adds timed audio

30 files changed, 7099 insertions, 0 deletions

diff --git a/examples/alsa_timed_audio/Makefile b/examples/alsa_timed_audio/Makefile
new file mode 100644
index 00000000..0348a88e
--- /dev/null
+++ b/examples/alsa_timed_audio/Makefile
@@ -0,0 +1,94 @@
+ALSA_INC=/usr/include/alsa
+ISAUDK_ROOT:=$(strip $(shell dirname $(realpath $(lastword \
+	$(MAKEFILE_LIST)))))
+ISAUDK_INC=$(ISAUDK_ROOT)
+DOC_DIR=$(ISAUDK_ROOT)/documentation
+
+PTP_INC=$(ISAUDK_ROOT)/../../daemons/gptp/common
+
+CFLAGS=-g -I$(ISAUDK_INC) -Wall -Wextra -Wno-unused-but-set-variable -Werror
+EXTERNAL_LIBS=-lasound -lpthread -lsndfile
+EXTERNAL_LIB_DIRS=-L/usr/local/lib/
+
+QUIET_CC=@/bin/echo -e '* [CC]\t\t$@';
+QUIET_MD=@/bin/echo -e '* [MAKEDEP]\t$@';
+QUIET_LD=@/bin/echo -e '* [LD]??$@ {$^}' | fold -w 62 -s | \
+	sed -e '1h;2,$$H;$$!d;g' -re 's/\n/\n\t\t/g;s/\?/\t/g';
+
+TEST_TARGETS=alsa_test
+PYTHON_HELPERS=play_file_at record_file_at monoraw_to_net_time \
+	net_time_to_monoraw
+
+.PHONY: all
+all: $(TEST_TARGETS) $(PYTHON_HELPERS)
+
+.PHONY: clean
+clean:
+	/usr/bin/env rm -f *.o $(TEST_TARGETS) $(PYTHON_HELPERS)
+
+.PHONY: pristine
+pristine: clean
+	/usr/bin/env rm -f *~ *.d \#*
+
+%.o: %.c
+	 $(QUIET_CC) $(CC) $(CFLAGS) -c $< -o $@
+
+%.d: %.c
+	$(QUIET_MD) $(CC) $(CFLAGS) -MM $< -o $@
+
+-include alsa.d
+alsa.o: CFLAGS += -I$(ALSA_INC)
+
+-include monoraw_to_net_time.d
+monoraw_to_net_time.o: CFLAGS += -I$(PTP_INC)
+
+-include net_time_to_monoraw.d
+net_time_to_monoraw.o: CFLAGS += -I$(PTP_INC)
+
+-include linked_list.d
+
+-include stack.d
+
+-include stream.d
+
+-include mixer.d
+
+-include thread_signal.d
+
+-include args.d
+
+-include alsa_test.d
+
+-include capture.d
+
+alsa_test: alsa_test.o alsa.o stream.o mixer.o linked_list.o thread_signal.o \
+	stack.o capture.o
+	$(QUIET_LD) $(CC) $(CFLAGS) $^ -o $@ $(EXTERNAL_LIB_DIRS) \
+	$(EXTERNAL_LIBS)
+
+-include play_file_at.d
+
+play_file_at: play_file_at.o args.o stream.o mixer.o linked_list.o alsa.o \
+	thread_signal.o stack.o capture.o
+	$(QUIET_LD) $(CC) $(CFLAGS) $^ -o $@ $(EXTERNAL_LIB_DIRS) \
+	$(EXTERNAL_LIBS)
+
+-include record_file_at.d
+
+record_file_at:	record_file_at.o args.o stream.o capture.o alsa.o \
+	thread_signal.o linked_list.o mixer.o stack.o
+	$(QUIET_LD) $(CC) $(CFLAGS) $^ -o $@ $(EXTERNAL_LIB_DIRS) \
+	$(EXTERNAL_LIBS)
+
+monoraw_to_net_time: monoraw_to_net_time.o args.o
+	$(QUIET_LD) $(CC) $(CFLAGS) $^ -o $@ -lrt
+
+net_time_to_monoraw: net_time_to_monoraw.o args.o
+	$(QUIET_LD) $(CC) $(CFLAGS) $^ -o $@ -lrt
+
+.PHONY: docs
+docs:
+	cd $(DOC_DIR); PROJECT_ROOT=$(ISAUDK_ROOT) SRC_DIR=$(ISAUDK_ROOT) \
+	doxygen Doxyfile
+	cd $(DOC_DIR)/latex; $(MAKE) pdf
+	cp $(DOC_DIR)/latex/refman.pdf $(ISAUDK_ROOT)/documentation.pdf
diff --git a/examples/alsa_timed_audio/README.md b/examples/alsa_timed_audio/README.md
new file mode 100644
index 00000000..ede17ca2
--- /dev/null
+++ b/examples/alsa_timed_audio/README.md
@@ -0,0 +1,65 @@
+<h1>
+Introduction
+</h1>
+The Intel Synchronized Audio Toolkit consists of several pieces of sample
+code that wrap ALSA timing primitives. It contains building blocks for a time
+aware mixer and capture module. It uses the OpenAVB time sync daemon for
+the 802.1AS protocol.
+
+There are several Python scripts that use this example code creating a simple
+demo that measures distance between two devices
+
+<h1>
+Prerequisites
+</h1>
+- **libsndfile** development package/source
+- **Doxygen**
+- **pdxlatex** - usually part of **TeX Live** package
+
+<h1>
+Building
+</h1>
+<h2>
+Build sample applications
+</h2>
+Checkout the Open-AVB submodule:
+<pre>
+git submodule update --init
+</pre>
+In the support directory run:
+<pre>
+make
+</pre>
+This generates the time sync daemon and helper application for the ranging
+demo that finds a "chirp" signal given an audio file
+
+In the top level directory run:
+<pre>
+make
+</pre>
+<h2>
+Build the documentation
+</h2>
+In the top level directory run:
+<pre>
+make docs
+</pre>
+Produces <i>documentation.pdf</i> in the top level directory.
+<h1>
+Running the demo
+</h1>
+In the support/RangingDemo directory run:
+<pre>
+./RangingDemo <-p|-r> -d \<peer IP address\> -i \<local interface name\>
+</pre>
+
+One machine should use the -p flag to play audio, the other machine should
+use the -r flag, to record audio.
+
+<h1>
+Example applications
+</h1>
+<p>@subpage play_at</p>
+<p>@subpage record_at</p>
+<p>@subpage sys_to_net_time</p>
+<p>@subpage net_to_sys_time</p>
diff --git a/examples/alsa_timed_audio/alsa.c b/examples/alsa_timed_audio/alsa.c
new file mode 100644
index 00000000..6b8a7fd0
--- /dev/null
+++ b/examples/alsa_timed_audio/alsa.c
@@ -0,0 +1,498 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <audio_output.h>
+#include <audio_input.h>
+#include <stack.h>
+#include <init.h>
+
+#include <asoundlib.h>
+
+#include <limits.h>
+
+void alsa_init( void ) _isaudk_io_init;
+
+#define DEFAULT_ALSA_DEVICE "hw:0,0"
+
+#define ALSA_PERIOD_TIME	( 20000		/* microsec */)
+#define ALSA_PERIODS_PER_BUFFER	( 15 ) /* ALSA always allocates 1 extra */
+
+typedef enum
+{
+	ISAUDK_ALSA_INTERNAL_ERROR,
+	ISAUDK_ALSA_FORMAT_ERROR,
+	ISAUDK_ALSA_OK,
+} isaudk_alsa_error_t;
+
+struct alsa_context
+{
+	snd_pcm_t			*alsa_handle;
+	snd_pcm_status_t		*alsa_status;
+	char *devname;
+	isaudk_alsa_error_t	 last_error;
+	const char		*last_error_func;
+	unsigned short		 last_error_line;
+};
+
+struct isaudk_input_context
+{
+	struct alsa_context ctx;
+};
+
+struct isaudk_output_context
+{
+	struct alsa_context ctx;
+};
+
+const struct isaudk_output *default_alsa_output;
+
+const struct isaudk_output *isaudk_get_default_alsa_output()
+{
+	return default_alsa_output;
+}
+
+const struct isaudk_input *default_alsa_input;
+
+const struct isaudk_input *isaudk_get_default_alsa_input()
+{
+	return default_alsa_input;
+}
+
+static inline void
+alsa_no_error( struct alsa_context *ctx )
+{
+	ctx->last_error = ISAUDK_ALSA_OK;
+	ctx->last_error_func = "";
+	ctx->last_error_line = 0;
+}
+
+static inline void
+_alsa_set_error( struct alsa_context *ctx, isaudk_alsa_error_t error,
+		const char *func, unsigned short line )
+{
+	ctx->last_error = error;
+	ctx->last_error_func = func;
+	ctx->last_error_line = line;
+}
+
+#define alsa_set_error( ctx, error )			\
+	_alsa_set_error( ctx, error, __FUNCTION__, __LINE__ );
+
+#define CHECK_ALSA_RESULT( err_code, ctx )				\
+	if( err < 0 )							\
+	{								\
+		alsa_set_error( ctx, err_code );			\
+		return false;						\
+	}
+
+static bool
+_alsa_set_audio_param( struct alsa_context *ctx,
+		       struct isaudk_format *format,
+		       unsigned rate )
+{
+        snd_pcm_hw_params_t *hwparams;
+        snd_pcm_sw_params_t *swparams;
+	snd_pcm_audio_tstamp_config_t tstamp_config;
+	snd_pcm_format_t alsa_format;
+
+	unsigned int period_time;
+	unsigned int periods_per_buffer;
+	int dir;
+	int err;
+
+	if( format == NULL )
+	{
+		alsa_set_error( ctx, ISAUDK_ALSA_FORMAT_ERROR );
+		return false;
+	}
+	switch( format->encoding )
+	{
+	default:
+		// Unsupported format request
+		alsa_set_error( ctx, ISAUDK_ALSA_FORMAT_ERROR );
+		return false;
+	case ISAUDK_ENC_PS16:
+		alsa_format = SND_PCM_FORMAT_S16;
+		break;
+	}
+
+        snd_pcm_hw_params_alloca( &hwparams );
+        snd_pcm_sw_params_alloca( &swparams );
+
+	err = snd_pcm_hw_params_any( ctx->alsa_handle, hwparams );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_hw_params_set_rate_resample( ctx->alsa_handle, hwparams,
+						   0 );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_hw_params_set_access( ctx->alsa_handle, hwparams,
+					    SND_PCM_ACCESS_MMAP_INTERLEAVED );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_hw_params_set_format( ctx->alsa_handle, hwparams,
+					    alsa_format );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_FORMAT_ERROR, ctx );
+
+	err = snd_pcm_hw_params_set_channels
+		( ctx->alsa_handle, hwparams, format->channels );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_FORMAT_ERROR, ctx );
+
+	err = snd_pcm_hw_params_set_rate
+		( ctx->alsa_handle, hwparams, rate*ISAUDK_RATE_MULTIPLIER, 0 );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_FORMAT_ERROR, ctx );
+
+	dir = 1;
+	period_time = ALSA_PERIOD_TIME;
+	err = snd_pcm_hw_params_set_period_time_near
+		( ctx->alsa_handle, hwparams, &period_time, &dir );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	dir = 1;
+	periods_per_buffer = ALSA_PERIODS_PER_BUFFER;
+	err = snd_pcm_hw_params_set_periods_near
+		( ctx->alsa_handle, hwparams, &periods_per_buffer, &dir );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_hw_params( ctx->alsa_handle, hwparams );
+
+	err = snd_pcm_sw_params_current( ctx->alsa_handle, swparams );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_sw_params_set_tstamp_mode
+		( ctx->alsa_handle, swparams, SND_PCM_TSTAMP_ENABLE );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_sw_params_set_tstamp_type
+		( ctx->alsa_handle, swparams,
+		  //		  SND_PCM_TSTAMP_TYPE_GETTIMEOFDAY );
+		  SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	tstamp_config.type_requested = 5;
+	tstamp_config.report_delay = 0;
+	snd_pcm_status_set_audio_htstamp_config
+		( ctx->alsa_status, &tstamp_config );
+
+	err = snd_pcm_sw_params_set_start_threshold
+		( ctx->alsa_handle, swparams, INT_MAX );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_sw_params( ctx->alsa_handle, swparams );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	alsa_no_error( ctx );
+	return true;
+}
+
+static bool
+alsa_set_audio_output_param( struct isaudk_output_context *ctx,
+			     struct isaudk_format *format,
+			     unsigned rate )
+{
+	int err;
+
+	err = snd_pcm_open( &ctx->ctx.alsa_handle, ctx->ctx.devname,
+			    SND_PCM_STREAM_PLAYBACK, 0 );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, &ctx->ctx );
+
+	return _alsa_set_audio_param( &ctx->ctx, format, rate );
+}
+
+static bool
+alsa_set_audio_input_param( struct isaudk_input_context *ctx,
+			     struct isaudk_format *format,
+			     unsigned rate )
+{
+	int err;
+
+	err = snd_pcm_open( &ctx->ctx.alsa_handle, ctx->ctx.devname,
+			    SND_PCM_STREAM_CAPTURE, 0 );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, &ctx->ctx );
+
+	return _alsa_set_audio_param( &ctx->ctx, format, rate );
+}
+
+#define NSEC_PER_SEC (1000000000)
+
+#define snd_htstamp_to_systime( ts )				\
+	((struct isaudk_system_time)					\
+	{ .time = (ts)->tv_sec*NSEC_PER_SEC*1ULL + (ts)->tv_nsec })
+
+#define snd_htstamp_to_audiotime( ts )				\
+	((struct isaudk_audio_time)					\
+	{ .time = (ts)->tv_sec*NSEC_PER_SEC*1ULL + (ts)->tv_nsec })
+
+bool _alsa_get_cross_tstamp( struct alsa_context *ctx,
+			     struct isaudk_cross_time *time )
+{
+	int err;
+	snd_htimestamp_t sys_ts, audio_ts;
+	snd_pcm_state_t state;
+
+	err = snd_pcm_status( ctx->alsa_handle, ctx->alsa_status );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	state = snd_pcm_status_get_state( ctx->alsa_status );
+	switch( state )
+	{
+		// These states will give valid results
+	case SND_PCM_STATE_RUNNING:
+	case SND_PCM_STATE_DRAINING:
+		break;
+		// Other states will not
+	default:
+		return false;
+	}
+
+	snd_pcm_status_get_htstamp( ctx->alsa_status, &sys_ts );
+	snd_pcm_status_get_audio_htstamp( ctx->alsa_status, &audio_ts );
+	time->sys = snd_htstamp_to_systime( &sys_ts );
+	time->dev = snd_htstamp_to_audiotime( &audio_ts );
+
+	alsa_no_error( ctx );
+	return true;
+}
+
+bool _alsa_start( struct alsa_context *ctx )
+{
+	int err;
+
+	alsa_no_error( ctx );
+	err = snd_pcm_start( ctx->alsa_handle );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	alsa_no_error( ctx );
+	return true;
+}
+
+bool _alsa_stop( struct alsa_context *ctx )
+{
+	int err;
+
+	err = snd_pcm_drain( ctx->alsa_handle );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	err = snd_pcm_close( ctx->alsa_handle );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, ctx );
+
+	alsa_no_error( ctx );
+	return true;
+}
+
+bool alsa_get_output_cross_tstamp( struct isaudk_output_context *ctx,
+				   struct isaudk_cross_time *time )
+{
+	return _alsa_get_cross_tstamp( &ctx->ctx, time );
+}
+
+bool alsa_start_output( isaudk_output_context_t ctx )
+{
+	return _alsa_start( &ctx->ctx );
+}
+
+bool alsa_stop_output( isaudk_output_context_t ctx )
+{
+	return _alsa_stop( &ctx->ctx );
+}
+
+bool alsa_queue_output_buffer( isaudk_output_context_t ctx,
+			       void *buffer, unsigned *count )
+{
+	snd_pcm_sframes_t err;
+
+	err = snd_pcm_mmap_writei( ctx->ctx.alsa_handle, buffer, *count );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, &ctx->ctx );
+
+	*count = err;
+	alsa_no_error( &ctx->ctx );
+	return true;
+}
+
+static struct isaudk_output_fn default_alsa_output_fn =
+{
+	.set_audio_param		= alsa_set_audio_output_param,
+	.get_cross_tstamp		= alsa_get_output_cross_tstamp,
+	.start				= alsa_start_output,
+	.stop				= alsa_stop_output,
+	.queue_output_buffer		= alsa_queue_output_buffer,
+};
+
+void alsa_delete_output( struct isaudk_output *output )
+{
+	if( output == NULL )
+		return;
+	else
+	{
+		if( output->ctx != NULL )
+		{
+			if( output->ctx->ctx.devname != NULL )
+				free(( void * ) output->ctx->ctx.devname );
+			snd_pcm_status_free( output->ctx->ctx.alsa_status );
+			free(( void * ) output->ctx );
+		}
+		free(( void * ) output );
+	}
+}
+
+struct isaudk_output *
+alsa_open_output( char *devname )
+{
+	struct isaudk_output *output;
+	int err;
+
+	output = (__typeof__( output )) malloc(( size_t ) sizeof( *output ));
+	if( output == NULL )
+		goto error;
+
+	output->ctx = (__typeof__( output->ctx ))
+		malloc(( size_t ) sizeof( *output->ctx ));
+	if( output->ctx == NULL )
+		goto error;
+
+	output->ctx->ctx.devname = (__typeof__( output->ctx->ctx.devname ))
+		malloc(( size_t ) sizeof( *output->ctx->ctx.devname )*
+		       strlen( devname ) + 1 );
+	if( output->ctx->ctx.devname == NULL )
+		goto error;
+	strncpy( output->ctx->ctx.devname, DEFAULT_ALSA_DEVICE, 7 );
+
+	err = snd_pcm_status_malloc( &output->ctx->ctx.alsa_status );
+	if( err == 0 )
+	{
+		alsa_no_error( &output->ctx->ctx );
+		output->fn = &default_alsa_output_fn;
+		return output;
+	}
+
+error:
+	alsa_delete_output( output );
+	return NULL;
+}
+
+bool alsa_get_input_cross_tstamp( struct isaudk_input_context *ctx,
+				   struct isaudk_cross_time *time )
+{
+	return _alsa_get_cross_tstamp( &ctx->ctx, time );
+}
+
+bool alsa_start_input( isaudk_input_context_t ctx )
+{
+	return _alsa_start( &ctx->ctx );
+}
+
+bool alsa_stop_input( isaudk_input_context_t ctx )
+{
+	return _alsa_stop( &ctx->ctx );
+}
+
+bool alsa_read_input_buffer( isaudk_input_context_t ctx,
+			     void *buffer, unsigned *count )
+{
+	snd_pcm_sframes_t err;
+
+	err = snd_pcm_mmap_readi( ctx->ctx.alsa_handle, buffer, *count );
+	CHECK_ALSA_RESULT( ISAUDK_ALSA_INTERNAL_ERROR, &ctx->ctx );
+
+	*count = err;
+	alsa_no_error( &ctx->ctx );
+	return true;
+}
+
+static struct isaudk_input_fn default_alsa_input_fn =
+{
+	.set_audio_param		= alsa_set_audio_input_param,
+	.get_cross_tstamp		= alsa_get_input_cross_tstamp,
+	.start				= alsa_start_input,
+	.stop				= alsa_stop_input,
+	.read_input_buffer		= alsa_read_input_buffer,
+};
+
+void alsa_delete_input( struct isaudk_input *input )
+{
+	if( input == NULL )
+		return;
+	else
+	{
+		if( input->ctx != NULL )
+		{
+			if( input->ctx->ctx.devname != NULL )
+				free(( void * ) input->ctx->ctx.devname );
+			snd_pcm_status_free( input->ctx->ctx.alsa_status );
+			free(( void * ) input->ctx );
+		}
+		free(( void * ) input );
+	}
+}
+
+struct isaudk_input *
+alsa_open_input( char *devname )
+{
+	struct isaudk_input *input;
+	int err;
+
+	input = (__typeof__( input )) malloc(( size_t ) sizeof( *input ));
+	if( input == NULL )
+		goto error;
+
+	input->ctx = (__typeof__( input->ctx ))
+		malloc(( size_t ) sizeof( *input->ctx ));
+	if( input->ctx == NULL )
+		goto error;
+
+	input->ctx->ctx.devname = (__typeof__( input->ctx->ctx.devname ))
+		malloc(( size_t ) sizeof( *input->ctx->ctx.devname )*
+		       strlen( devname ) + 1 );
+	if( input->ctx->ctx.devname == NULL )
+		goto error;
+	strncpy( input->ctx->ctx.devname, DEFAULT_ALSA_DEVICE, 7 );
+
+	err = snd_pcm_status_malloc( &input->ctx->ctx.alsa_status );
+	if( err == 0 )
+	{
+		alsa_no_error( &input->ctx->ctx );
+		input->fn = &default_alsa_input_fn;
+		return input;
+	}
+
+error:
+	alsa_delete_input( input );
+	return NULL;
+}
+
+void
+alsa_init( void )
+{
+	default_alsa_output = alsa_open_output( DEFAULT_ALSA_DEVICE );
+	default_alsa_input = alsa_open_input( DEFAULT_ALSA_DEVICE );
+}
diff --git a/examples/alsa_timed_audio/alsa.h b/examples/alsa_timed_audio/alsa.h
new file mode 100644
index 00000000..af2c00c9
--- /dev/null
+++ b/examples/alsa_timed_audio/alsa.h
@@ -0,0 +1,18 @@
+#ifndef ALSA_H
+#define ALSA_H
+
+#include <audio_output.h>
+
+struct isaudk_output *
+isaudk_get_default_alsa_output();
+
+struct isaudk_output *
+alsa_open_output( char *devname );
+
+struct isaudk_input *
+isaudk_get_default_alsa_input();
+
+struct isaudk_input *
+alsa_open_input( char *devname );
+
+#endif/*ALSA_H*/
diff --git a/examples/alsa_timed_audio/alsa_test.c b/examples/alsa_timed_audio/alsa_test.c
new file mode 100644
index 00000000..78ba1f5c
--- /dev/null
+++ b/examples/alsa_timed_audio/alsa_test.c
@@ -0,0 +1,69 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <alsa.h>
+#include <stdio.h>
+#include <inttypes.h>
+
+int main()
+{
+	struct isaudk_output *output;
+	struct isaudk_format format;
+	struct isaudk_cross_time cross_time;
+
+	format.encoding = ISAUDK_ENC_PS16;
+	format.channels = 2;
+
+	// Open alsa
+	output = isaudk_get_default_alsa_output();
+	if( output == NULL )
+		printf( "Get default ALSA output failed\n" );
+	else
+		printf( "Get default ALSA output succeeded\n" );
+
+	if( !output->fn->set_audio_param( output->ctx, &format,
+					  _48K_SAMPLE_RATE ) )
+		printf( "Set ALSA output params failed\n" );
+	else
+		printf( "Set ALSA output params succeeded\n" );
+
+	if( !output->fn->get_cross_tstamp( output->ctx, &cross_time ))
+		printf( "Get ALSA cross timestamp failed\n" );
+	else
+		printf( "Get ALSA cross timestamp succeeded\n" );
+
+	printf( "System time: %"PRIu64"\n", cross_time.sys.time );
+	printf( "Audio time: %"PRIu64"\n", cross_time.dev.time );
+
+	return 0;
+}
diff --git a/examples/alsa_timed_audio/args.c b/examples/alsa_timed_audio/args.c
new file mode 100644
index 00000000..2f03e582
--- /dev/null
+++ b/examples/alsa_timed_audio/args.c
@@ -0,0 +1,224 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <args.h>
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+char *isaudk_input_file_arg = "if";
+char *isaudk_output_file_arg = "of";
+char *isaudk_start_time_arg = "st";
+char *isaudk_duration_arg = "dn";
+char *isaudk_systime_arg = "syst";
+char *isaudk_nettime_arg = "netwkt";
+
+// Change string to lower case
+static inline void str_lower( char *str )
+{
+	char *c;
+	for( c = str; *c != '\0'; ++c )
+		*c = tolower(*c);
+}
+
+static inline isaudk_parse_error_t
+generic_string_parse( char **dest, char *src, bool *dynamic )
+{
+	*dynamic = true;
+	*dest = (__typeof__(*dest))
+		malloc((size_t) sizeof(char)*(strlen(src)+1));
+	strncpy( *dest, src, strlen(src)+1 );
+
+	return ISAUDK_PARSE_SUCCESS;
+}
+
+static inline isaudk_parse_error_t
+generic_u64_parse( uint64_t *dest, char *src, bool *dynamic )
+{
+	*dynamic = false;
+	*dest = strtoull( src, NULL, 0 );
+
+	if( *dest != ULLONG_MAX )
+		return ISAUDK_PARSE_SUCCESS;
+	else
+		return ISAUDK_PARSE_ARG_FAIL;
+}
+
+static inline isaudk_parse_error_t
+generic_u32_parse( uint32_t *dest, char *src, bool *dynamic )
+{
+	uint64_t tmp;
+
+	*dynamic = false;
+	tmp = strtoull( src, NULL, 0 );
+
+	if( tmp != ULLONG_MAX && tmp <= UINT_MAX )
+	{
+		*dest = tmp & UINT_MAX;
+		return ISAUDK_PARSE_SUCCESS;
+	}
+	else
+		return ISAUDK_PARSE_ARG_FAIL;
+}
+
+// Sort arguments, bubble sort
+static void sort_arg( struct isaudk_arg **arg, size_t count )
+{
+	size_t i;
+	struct isaudk_arg *tmp;
+	int inorder = 0;
+
+	while( !inorder )
+	{
+		inorder = 1;
+		for( i = 0; i < count-1; ++i ) {
+			if( strcmp( arg[i]->label, arg[i+1]->label ) > 0 ) {
+				tmp		= arg[i];
+				arg[i]		= arg[i+1];
+				arg[i+1]	= tmp;
+				inorder = 0;
+			}
+		}
+	}
+}
+
+// Find entry corresponding to argument
+static struct isaudk_arg *find_arg_n( struct isaudk_arg **arg, size_t count,
+				      char *match, size_t n )
+{
+	size_t i;
+
+	for( i = 0; i < count; ++i )
+	{
+		int order = strncmp( match, arg[i]->label, n );
+		if( order == 0 )
+			return arg[i];
+		if( order < 0 )
+			return NULL;
+	}
+	return NULL;
+}
+
+// Find length of flag, stop at punctuation or NUL
+static size_t flaglen( char *flag )
+{
+	char *saveflag = flag;
+
+	while( !ispunct( *flag ) && *flag != '\0' )
+		++flag;
+	return flag - saveflag;
+}
+
+#define PARSE_OPTION(opt) \
+case ISAUDK_##opt##_IDX:				\
+	match->found = true;				\
+	*parse_error =					\
+	ISAUDK_##opt##_PARSE_FN				\
+		( match->arg.ISAUDK_##opt##_VAR,	\
+		  argv[i]+fln+2, &match->dynamic );	\
+							\
+	if( *parse_error != ISAUDK_PARSE_SUCCESS )	\
+		return i;				\
+	break;
+
+int isaudk_parse_args( struct isaudk_arg *_args, size_t count, int argc,
+		       char **argv, isaudk_parse_error_t *parse_error )
+{
+	int i;
+	size_t j;
+
+	struct isaudk_arg **args;
+	args = (__typeof__(args))
+		malloc((size_t) sizeof(struct isaudk_arg *) * count);
+
+	for( j = 0; j < count; ++j )
+	{
+		args[j] = _args+j;
+	}
+
+	sort_arg( args, count );
+
+	i = 0;
+	while( i < argc )
+	{
+		if( ispunct( *argv[i] ))
+		{
+			struct isaudk_arg *match;
+			size_t fln;
+
+			fln = flaglen( argv[i]+1 );
+			match = find_arg_n( args, count, argv[i]+1, fln );
+			if( match == NULL )
+			{
+				*parse_error = ISAUDK_PARSE_ARG_UNKNOWN;
+				return i;
+			}
+
+			switch( match->index )
+			{
+			default:
+				// Fatal internal error
+				*parse_error = ISAUDK_PARSE_ARG_UNKNOWN_INDEX;
+				return i;
+
+				PARSE_OPTION(INPUT_FILE)
+				PARSE_OPTION(OUTPUT_FILE)
+				PARSE_OPTION(START_TIME)
+				PARSE_OPTION(DURATION)
+				PARSE_OPTION(SYSTIME)
+				PARSE_OPTION(NETTIME)
+			}
+			++i;
+		}
+		else
+		{
+			// Non-option argument encountered
+			*parse_error = ISAUDK_PARSE_SUCCESS;
+			break;
+		}
+	}
+
+	// Check for required arguments that were not found
+	for( j = 0; j < count; ++j )
+	{
+		if( args[j]->optional == false && args[j]->found == false )
+		{
+			*parse_error = ISAUDK_PARSE_ARG_NOT_FOUND;
+			return i;
+		}
+	}
+
+	return ISAUDK_PARSE_SUCCESS;
+}
diff --git a/examples/alsa_timed_audio/args.h b/examples/alsa_timed_audio/args.h
new file mode 100644
index 00000000..8cdc6556
--- /dev/null
+++ b/examples/alsa_timed_audio/args.h
@@ -0,0 +1,125 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef ISAUDK_ARGS_H
+#define ISAUDK_ARGS_H
+
+#include <sdk.h>
+
+#define STRING_PTR_TYPE char *
+#define TIME_TYPE uint64_t
+
+extern char *isaudk_input_file_arg;
+#define ISAUDK_INPUT_FILE_VAR input_file
+#define ISAUDK_INPUT_FILE_IDX 0
+#define ISAUDK_INPUT_FILE_TYPE STRING_PTR_TYPE
+#define ISAUDK_INPUT_FILE_ARG isaudk_input_file_arg
+#define ISAUDK_INPUT_FILE_PARSE_FN generic_string_parse
+
+extern char *isaudk_output_file_arg;
+#define ISAUDK_OUTPUT_FILE_VAR output_file
+#define ISAUDK_OUTPUT_FILE_IDX 1
+#define ISAUDK_OUTPUT_FILE_TYPE STRING_PTR_TYPE
+#define ISAUDK_OUTPUT_FILE_ARG isaudk_output_file_arg
+#define ISAUDK_OUTPUT_FILE_PARSE_FN generic_string_parse
+
+extern char *isaudk_start_time_arg;
+#define ISAUDK_START_TIME_VAR start_time
+#define ISAUDK_START_TIME_IDX 2
+#define ISAUDK_START_TIME_TYPE TIME_TYPE
+#define ISAUDK_START_TIME_ARG isaudk_start_time_arg
+#define ISAUDK_START_TIME_PARSE_FN generic_u64_parse
+
+extern char *isaudk_duration_arg;
+#define ISAUDK_DURATION_VAR duration
+#define ISAUDK_DURATION_IDX 3
+#define ISAUDK_DURATION_TYPE uint32_t
+#define ISAUDK_DURATION_ARG isaudk_duration_arg
+#define ISAUDK_DURATION_PARSE_FN generic_u32_parse
+
+extern char *isaudk_systime_arg;
+#define ISAUDK_SYSTIME_VAR systime
+#define ISAUDK_SYSTIME_IDX 4
+#define ISAUDK_SYSTIME_TYPE uint64_t
+#define ISAUDK_SYSTIME_ARG isaudk_systime_arg
+#define ISAUDK_SYSTIME_PARSE_FN generic_u64_parse
+
+extern char *isaudk_nettime_arg;
+#define ISAUDK_NETTIME_VAR nettime
+#define ISAUDK_NETTIME_IDX 5
+#define ISAUDK_NETTIME_TYPE uint64_t
+#define ISAUDK_NETTIME_ARG isaudk_nettime_arg
+#define ISAUDK_NETTIME_PARSE_FN generic_u64_parse
+
+#define ISAUDK_DECLARE_VAR(x) ISAUDK_##x##_TYPE * ISAUDK_##x##_VAR
+#define _ISAUDK_DECLARE_ARG(x,y,z) { .label = ISAUDK_##x##_ARG, \
+			.arg = { . ISAUDK_##x##_VAR = y },		\
+			.found = false, .dynamic = false, .optional = z, \
+				 .index = ISAUDK_##x##_IDX }
+
+#define ISAUDK_DECLARE_OPTIONAL_ARG(x,y) _ISAUDK_DECLARE_ARG(x,y,true)
+#define ISAUDK_DECLARE_REQUIRED_ARG(x,y) _ISAUDK_DECLARE_ARG(x,y,false)
+
+typedef union
+{
+	ISAUDK_DECLARE_VAR(OUTPUT_FILE);
+	ISAUDK_DECLARE_VAR(INPUT_FILE);
+	ISAUDK_DECLARE_VAR(START_TIME);
+	ISAUDK_DECLARE_VAR(DURATION);
+	ISAUDK_DECLARE_VAR(SYSTIME);
+	ISAUDK_DECLARE_VAR(NETTIME);
+} _isaudk_arg_t;
+
+struct isaudk_arg
+{
+	char *label;
+	unsigned index;
+	bool found;
+	bool optional;
+	bool dynamic;
+	_isaudk_arg_t arg;
+};
+
+typedef enum
+{
+	ISAUDK_PARSE_SUCCESS,
+	ISAUDK_PARSE_ARG_FAIL,
+	ISAUDK_PARSE_ARG_NOT_FOUND,
+	ISAUDK_PARSE_ARG_UNKNOWN,
+	ISAUDK_PARSE_ARG_UNKNOWN_INDEX,
+} isaudk_parse_error_t;
+
+int isaudk_parse_args( struct isaudk_arg *args, size_t count, int argc,
+		       char **argv, isaudk_parse_error_t *parse_error );
+
+#endif/*ISAUDK_ARGS_H*/
diff --git a/examples/alsa_timed_audio/audio_input.h b/examples/alsa_timed_audio/audio_input.h
new file mode 100644
index 00000000..8aaa06de
--- /dev/null
+++ b/examples/alsa_timed_audio/audio_input.h
@@ -0,0 +1,67 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef AUDIO_INPUT_H
+#define AUDIO_INPUT_H
+
+#include <sdk.h>
+#include <stack.h>
+
+typedef struct isaudk_input_context*	isaudk_input_context_t;
+
+// Audio output operations
+//
+struct isaudk_input_fn {
+	// Set audio format
+	bool ( *set_audio_param )( isaudk_input_context_t ctx,
+				   struct isaudk_format *format,
+				   unsigned rate );
+	// Get system/device timestamp
+	bool ( *get_cross_tstamp )( isaudk_input_context_t ctx,
+				    struct isaudk_cross_time *time );
+	// Read buffer
+	bool ( *read_input_buffer )( isaudk_input_context_t ctx,
+				     void *buffer, unsigned *count );
+	// Start
+	bool ( *start )( isaudk_input_context_t ctx );
+
+	// Stop
+	bool ( *stop )( isaudk_input_context_t ctx );
+};
+
+struct isaudk_input {
+	struct isaudk_input_fn 	*fn;
+	isaudk_input_context_t	 ctx;
+};
+
+#endif/*AUDIO_INPUT_H*/
diff --git a/examples/alsa_timed_audio/audio_output.h b/examples/alsa_timed_audio/audio_output.h
new file mode 100644
index 00000000..9fc43eca
--- /dev/null
+++ b/examples/alsa_timed_audio/audio_output.h
@@ -0,0 +1,67 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef OUTPUT_H
+#define OUTPUT_H
+
+#include <sdk.h>
+#include <stack.h>
+
+typedef struct isaudk_output_context*	isaudk_output_context_t;
+
+// Audio output operations
+//
+struct isaudk_output_fn {
+	// Set audio format
+	bool ( *set_audio_param )( isaudk_output_context_t ctx,
+				   struct isaudk_format *format,
+				   unsigned rate );
+	// Get system/device timestamp
+	bool ( *get_cross_tstamp )( isaudk_output_context_t ctx,
+				    struct isaudk_cross_time *time );
+	// Queue buffer
+	bool ( *queue_output_buffer )( isaudk_output_context_t ctx,
+				       void *buffer, unsigned *count );
+	// Start
+	bool ( *start )( isaudk_output_context_t ctx );
+
+	// Stop
+	bool ( *stop )( isaudk_output_context_t ctx );
+};
+
+struct isaudk_output {
+	struct isaudk_output_fn 	*fn;
+	isaudk_output_context_t		 ctx;
+};
+
+#endif/*OUTPUT_H*/
diff --git a/examples/alsa_timed_audio/bool.h b/examples/alsa_timed_audio/bool.h
new file mode 100644
index 00000000..570b8e9a
--- /dev/null
+++ b/examples/alsa_timed_audio/bool.h
@@ -0,0 +1,12 @@
+#ifndef BOOL_H
+#define BOOL_H
+
+typedef _Bool	bool;
+
+typedef enum
+{
+	true 	= -1,
+	false	= 0,
+} _bool_t;
+
+#endif/*BOOL_H*/
diff --git a/examples/alsa_timed_audio/capture.c b/examples/alsa_timed_audio/capture.c
new file mode 100644
index 00000000..39172ee8
--- /dev/null
+++ b/examples/alsa_timed_audio/capture.c
@@ -0,0 +1,502 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <sdk.h>
+#include <pthread.h>
+#include <thread_signal.h>
+#include <util.h>
+#include <stream.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <init.h>
+#include <audio_input.h>
+#include <alsa.h>
+#include <stdio.h>
+
+#define PER_STREAM_BUFFER_COUNT 3
+
+// We'll get a "pretty good" estimation of the start time at 50 ms
+#define CROSSTSTAMP_THRESHOLD	( 50000000 ) /*ns*/
+
+struct isaudk_capture_handle {
+        struct isaudk_input *input;
+        struct isaudk_format format;
+        isaudk_sample_rate_t rate;
+
+	isaudk_stream_handle_t stream;
+
+        bool start_req;
+        bool exit_req;
+	bool capturing;
+        bool running;
+
+        pthread_t thread;
+
+        pthread_mutex_t capture_state_lock;
+        pthread_mutex_t capture_control_lock;
+        isaudk_signal_t wake_signal;
+
+        bool fatal;
+        isaudk_error_t thread_exit_code;
+        bool fatal_loop; // Failsafe indicator
+
+        struct isaudk_system_time       start_time;
+        struct isaudk_cross_time        curr_cross_time;
+        struct isaudk_cross_time        initial_cross_time;
+};
+
+struct per_stream_sample_buffer
+{
+	isaudk_sample_block_t buffer[PER_STREAM_BUFFER_COUNT];
+	uint16_t count[PER_STREAM_BUFFER_COUNT];
+
+	// incremented by the mixer loop each time buffer is read
+	uint8_t read_seq[PER_STREAM_BUFFER_COUNT];
+	// incremented each time buffer is written
+	uint8_t write_seq[PER_STREAM_BUFFER_COUNT];
+
+	uint8_t idx;
+	isaudk_signal_t signal;
+};
+
+static void capture_init( void ) _isaudk_capture_init;
+
+static struct isaudk_capture_handle _default_capture;
+static struct isaudk_capture_handle *default_capture;
+
+isaudk_capture_handle_t isaudk_get_default_capture()
+{
+	return default_capture;
+}
+
+static unsigned
+get_buffer_sample_count( isaudk_capture_handle_t capture )
+{
+	return PS16_SAMPLE_COUNT / capture->format.channels;
+}
+
+isaudk_error_t
+isaudk_capture_register_stream( isaudk_capture_handle_t capture,
+				isaudk_stream_handle_t stream,
+				struct isaudk_format *format,
+				isaudk_sample_rate_t rate )
+{
+	isaudk_error_t ret = ISAUDK_SUCCESS;
+	struct per_stream_sample_buffer *sample_buffer;
+	int i;
+
+	// Check that the format matches
+	if( format != NULL &&
+	    !isaudk_is_format_equal( format, &capture->format ))
+		return ISAUDK_BADFORMAT;
+
+	// Check that the format matches
+	if( rate != DEFAULT_SAMPLE_RATE && capture->rate != rate )
+		return ISAUDK_BADFORMAT;
+
+	// Allocate a buffer for the stream and add this to the provate
+	sample_buffer = (__typeof__(sample_buffer))
+		malloc((size_t) sizeof( struct per_stream_sample_buffer ));
+	if( sample_buffer == NULL )
+		return ISAUDK_NOMEMORY;
+	sample_buffer->idx = 0;
+	if( isaudk_create_signal( &sample_buffer->signal )
+	    != ISAUDK_SIGNAL_OK )
+	{
+		return ISAUDK_NOMEMORY;
+	}
+	for( i = 0; i < PER_STREAM_BUFFER_COUNT; ++i )
+	{
+		sample_buffer->read_seq[i] = 0;
+		sample_buffer->write_seq[i] = 0;
+	}
+
+	isaudk_stream_set_capture_private( stream, sample_buffer );
+
+	capture->stream = stream;
+
+	return ret;
+}
+
+// Inside loop reports fatal error
+#define CHECKED_PTHREAD_CALL_FATAL(pthread_call,capture)	\
+	{							\
+		int err;					\
+		err = pthread_call;				\
+		if( err != 0 ) {				\
+			(capture)->fatal_loop = true;		\
+			return NULL;				\
+		}						\
+	}
+
+#define CAPTURE_LOOP_LOCK_CAPTURE				\
+	CHECKED_PTHREAD_CALL_FATAL				\
+	( pthread_mutex_lock( &capture->capture_state_lock ), capture )
+
+#define CAPTURE_LOOP_UNLOCK_CAPTURE				\
+	CHECKED_PTHREAD_CALL_FATAL				\
+	( pthread_mutex_unlock( &capture->capture_state_lock ), capture )
+
+struct capture_loop_arg
+{
+	struct isaudk_capture_handle *capture;
+	isaudk_signal_t signal;
+};
+
+void *capture_loop( void *_arg )
+{
+	struct capture_loop_arg *arg = (struct capture_loop_arg *) _arg;
+	struct isaudk_capture_handle *capture = arg->capture;
+	isaudk_signal_error_t sigerr;
+	struct per_stream_sample_buffer *stream_buffer;
+	bool cross_tstamp_result;
+
+	void *buffer;
+
+	capture->running = true;
+	capture->initial_cross_time = INVALID_CROSS_TIME;
+	capture->curr_cross_time = INVALID_CROSS_TIME;
+	capture->thread_exit_code = ISAUDK_SUCCESS;
+	capture->start_time.time = ULLONG_MAX;
+
+	// Signal the calling thread
+	sigerr = isaudk_signal_send( arg->signal );
+	if( sigerr != ISAUDK_SIGNAL_OK ) {
+		CAPTURE_LOOP_LOCK_CAPTURE;
+		capture->running = false;
+		capture->thread_exit_code = ISAUDK_PTHREAD;
+		CAPTURE_LOOP_UNLOCK_CAPTURE;
+
+		return NULL;
+	}
+
+	capture->input->fn->start( capture->input->ctx );
+	CAPTURE_LOOP_LOCK_CAPTURE;
+	cross_tstamp_result = capture->input->fn->get_cross_tstamp
+		( capture->input->ctx, &capture->initial_cross_time );
+	CAPTURE_LOOP_UNLOCK_CAPTURE;
+	capture->capturing = true;
+
+	while( !capture->exit_req )
+	{
+		unsigned samples_to_read;
+		bool read_result;
+		struct isaudk_cross_time curr_cross_time;
+
+		stream_buffer = isaudk_stream_get_capture_private
+			( capture->stream );
+		buffer = get_buffer_pointer
+			( &capture->format,
+			  stream_buffer->buffer + stream_buffer->idx );
+
+		// Capture buffer
+		while( stream_buffer->read_seq[stream_buffer->idx] !=
+		       stream_buffer->write_seq[stream_buffer->idx] )
+		{
+			isaudk_signal_wait( capture->wake_signal, 0 );
+		}
+
+		samples_to_read = get_buffer_sample_count( capture );
+		read_result = capture->input->fn->read_input_buffer
+			( capture->input->ctx, buffer, &samples_to_read );
+		if( !read_result )
+		{
+			CAPTURE_LOOP_LOCK_CAPTURE;
+			capture->thread_exit_code = ISAUDK_FATAL;
+			CAPTURE_LOOP_UNLOCK_CAPTURE;
+			break;
+		}
+		++stream_buffer->write_seq[stream_buffer->idx];
+
+		cross_tstamp_result = capture->input->fn->get_cross_tstamp
+			( capture->input->ctx, &curr_cross_time );
+
+		if( !isaudk_crosstime_equal
+		    ( &capture->curr_cross_time, &INVALID_CROSS_TIME ) &&
+		    ((capture->curr_cross_time.dev.time <=
+		      CROSSTSTAMP_THRESHOLD &&
+		      curr_cross_time.dev.time > CROSSTSTAMP_THRESHOLD) ))
+		{
+			double ratio;
+			unsigned delta;
+
+			ratio  = curr_cross_time.sys.time;
+			ratio -= capture->initial_cross_time.sys.time;
+			ratio /= curr_cross_time.dev.time -
+				capture->initial_cross_time.dev.time;
+
+			delta = capture->initial_cross_time.dev.time * ratio;
+
+			capture->start_time = capture->initial_cross_time.sys;
+			capture->start_time.time -= delta;
+		}
+
+		stream_buffer->idx = ( stream_buffer->idx + 1 ) %
+			PER_STREAM_BUFFER_COUNT;
+		CAPTURE_LOOP_LOCK_CAPTURE;
+		capture->curr_cross_time = curr_cross_time;
+		CAPTURE_LOOP_UNLOCK_CAPTURE;
+		// Signal for more data
+		isaudk_signal_send( stream_buffer->signal );
+	}
+
+	capture->input->fn->stop( capture->input->ctx );
+	// Exit normally
+	capture->running = false;
+
+	// Send a signal at the end, if we exit abnormally the client may
+	// be "hung" waiting for a signal
+	isaudk_signal_send( stream_buffer->signal );
+
+	return NULL;
+}
+
+// Inside loop reports fatal error
+#define CHECKED_PTHREAD_CALL_FATAL(pthread_call,capture)	\
+	{							\
+		int err;					\
+		err = pthread_call;				\
+		if( err != 0 ) {				\
+			(capture)->fatal_loop = true;		\
+			return NULL;				\
+		}						\
+	}
+
+#define CAPTURE_LOOP_LOCK_CAPTURE					\
+	CHECKED_PTHREAD_CALL_FATAL					\
+	( pthread_mutex_lock( &capture->capture_state_lock ), capture )
+
+#define CAPTURE_LOOP_UNLOCK_CAPTURE					\
+	CHECKED_PTHREAD_CALL_FATAL					\
+	( pthread_mutex_unlock( &capture->capture_state_lock ), capture )
+
+#define COND_RETURN_UNLOCK(cond,stmt,retval)	\
+	if(( cond ))				\
+	{					\
+		stmt;				\
+		ret = (retval);			\
+		goto unlock;			\
+	}
+
+
+isaudk_error_t
+isaudk_start_capture( isaudk_capture_handle_t capture )
+{
+	struct capture_loop_arg arg;
+	isaudk_error_t ret = ISAUDK_SUCCESS;
+
+	if( pthread_mutex_lock( &capture->capture_control_lock ) != 0 )
+		return ISAUDK_PTHREAD;
+
+	if( capture->start_req )
+	{
+		COND_RETURN_UNLOCK( capture->running,, ISAUDK_SUCCESS )
+		else
+			COND_RETURN_UNLOCK( capture->fatal ||
+					    capture->fatal_loop,,
+					    ISAUDK_FATAL )
+			else
+				COND_RETURN_UNLOCK
+					( true,, capture->thread_exit_code );
+	}
+
+	COND_RETURN_UNLOCK
+		( isaudk_create_signal( &arg.signal ) != ISAUDK_SIGNAL_OK,
+		  capture->fatal = true, ISAUDK_PTHREAD );
+
+	arg.capture = capture;
+	capture->exit_req = false;
+
+	COND_RETURN_UNLOCK
+		( pthread_create( &capture->thread, NULL, capture_loop, &arg )
+		  != 0, capture->fatal = true, ISAUDK_PTHREAD );
+
+	COND_RETURN_UNLOCK
+		( isaudk_signal_wait( arg.signal, 0 ) != ISAUDK_SIGNAL_OK,
+		  {
+			  pthread_cancel( capture->thread );
+			  capture->fatal = true; }, ISAUDK_PTHREAD )
+
+	capture->start_req = true;
+
+unlock:
+	pthread_mutex_unlock( &capture->capture_control_lock );
+
+	return ret;
+}
+
+void isaudk_capture_get_stream_buffer( isaudk_stream_handle_t stream,
+				     isaudk_sample_block_t **sample_buffer,
+				     unsigned *count,
+				     isaudk_signal_t *signal )
+{
+	struct per_stream_sample_buffer *buffer;
+
+	buffer = isaudk_stream_get_capture_private( stream );
+	*sample_buffer = buffer->buffer;
+	*count = PER_STREAM_BUFFER_COUNT;
+	*signal = buffer->signal;
+}
+
+
+uint8_t
+isaudk_capture_get_current_index( isaudk_stream_handle_t stream, bool *roll )
+{
+	struct per_stream_sample_buffer *buffer;
+	uint8_t retval;
+
+	buffer = isaudk_stream_get_capture_private( stream );
+	retval = buffer->idx;
+
+	if( buffer->write_seq[retval] != buffer->read_seq[retval] )
+		*roll = true;
+	else
+		*roll = false;
+
+	return buffer->idx;
+}
+
+// Mark buffer as read and usable by capture loop
+isaudk_error_t
+isaudk_capture_mark_buffer_done( isaudk_stream_handle_t stream,
+				 struct isaudk_capture_handle *capture,
+				 size_t idx )
+{
+	struct per_stream_sample_buffer *buffer;
+	isaudk_error_t thread_exit_code;
+
+	buffer = (__typeof__(buffer))
+		isaudk_stream_get_capture_private( stream );
+
+	if( capture->fatal )
+		return ISAUDK_FATAL;
+
+	// Check the arguments
+	if( idx > PER_STREAM_BUFFER_COUNT - 1 )
+		return ISAUDK_INVALIDARG;
+
+	// Don't read old data in the buffer
+	if( UINT8_ADD( buffer->read_seq[idx], 1 ) != buffer->write_seq[idx] )
+		return ISAUDK_AGAIN;
+
+	pthread_mutex_lock( &capture->capture_state_lock );
+	thread_exit_code = capture->thread_exit_code;
+	pthread_mutex_unlock( &capture->capture_state_lock );
+	if( thread_exit_code != ISAUDK_SUCCESS )
+		return thread_exit_code;
+
+	++buffer->read_seq[idx];
+	isaudk_signal_send( capture->wake_signal );
+
+	return ISAUDK_SUCCESS;
+}
+
+isaudk_error_t
+isaudk_capture_get_start_time( isaudk_capture_handle_t capture,
+			       struct isaudk_system_time *start_time )
+{
+	struct isaudk_system_time start_time_tmp;
+	isaudk_error_t error;
+
+	pthread_mutex_lock( &capture->capture_state_lock );
+	start_time_tmp = capture->start_time;
+	error = capture->thread_exit_code;
+	pthread_mutex_unlock( &capture->capture_state_lock );
+
+	if( error != ISAUDK_SUCCESS )
+		return error;
+
+	if( start_time_tmp.time != ULLONG_MAX )
+	{
+		*start_time = start_time_tmp;
+		return ISAUDK_SUCCESS;
+	}
+
+	return ISAUDK_AGAIN;
+}
+
+bool _capture_init( struct isaudk_capture_handle *capture )
+{
+	if( pthread_mutex_init( &capture->capture_control_lock, NULL ) != 0 )
+		return false;
+
+	if( pthread_mutex_init( &capture->capture_state_lock, NULL ) != 0 )
+		return false;
+
+	capture->fatal = false;
+	capture->running = false;
+	capture->start_req = false;
+
+	if( isaudk_create_signal( &capture->wake_signal ) != ISAUDK_SIGNAL_OK )
+	{
+		return ISAUDK_NOMEMORY;
+	}
+
+	return true;
+}
+
+static void capture_init( void )
+{
+	// Default ALSA settings must match these defaults
+	_default_capture.input = isaudk_get_default_alsa_input();
+
+	if( _default_capture.input == NULL )
+		return;
+
+	// Setup the default capture here
+	if( !_capture_init( &_default_capture ))
+		return;
+
+	_default_capture.format.encoding = ISAUDK_ENC_PS16;
+	_default_capture.format.channels = 2;
+	_default_capture.rate = _48K_SAMPLE_RATE;
+	if( !_default_capture.input->fn->set_audio_param
+	    ( _default_capture.input->ctx, &_default_capture.format,
+	      _48K_SAMPLE_RATE ))
+		return;
+
+	default_capture = &_default_capture;
+}
+
+isaudk_error_t
+isaudk_capture_get_stream_info( struct isaudk_capture_handle *handle,
+				struct isaudk_format *format,
+				isaudk_sample_rate_t *rate )
+{
+	if( format != NULL )
+		*format = handle->format;
+	if( rate != NULL )
+		*rate = handle->rate;
+
+	return ISAUDK_SUCCESS;
+}
diff --git a/examples/alsa_timed_audio/capture.h b/examples/alsa_timed_audio/capture.h
new file mode 100644
index 00000000..f6aa7927
--- /dev/null
+++ b/examples/alsa_timed_audio/capture.h
@@ -0,0 +1,72 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef CAPTURE_H
+#define CAPTURE_H
+
+#include <sdk.h>
+
+isaudk_capture_handle_t isaudk_get_default_capture();
+
+isaudk_error_t
+isaudk_start_capture( isaudk_capture_handle_t capture );
+
+void isaudk_capture_get_stream_buffer( isaudk_stream_handle_t stream,
+				     isaudk_sample_block_t **sample_buffer,
+				     unsigned *count,
+				     isaudk_signal_t *signal );
+
+uint8_t
+isaudk_capture_get_current_index( isaudk_stream_handle_t stream, bool *roll );
+
+isaudk_error_t
+isaudk_capture_get_start_time( isaudk_capture_handle_t mixer,
+			       struct isaudk_system_time *start_time );
+
+isaudk_error_t
+isaudk_capture_register_stream( isaudk_capture_handle_t capture,
+				isaudk_stream_handle_t stream,
+				struct isaudk_format *format,
+				isaudk_sample_rate_t rate );
+
+isaudk_error_t
+isaudk_capture_get_stream_info( isaudk_capture_handle_t handle,
+				struct isaudk_format *format,
+				isaudk_sample_rate_t *rate );
+
+isaudk_error_t
+isaudk_capture_mark_buffer_done( isaudk_stream_handle_t stream,
+				 isaudk_capture_handle_t capture,
+				 size_t idx );
+
+#endif/*CAPTURE_H*/
diff --git a/examples/alsa_timed_audio/documentation/Doxyfile b/examples/alsa_timed_audio/documentation/Doxyfile
new file mode 100644
index 00000000..dc4b2dbe
--- /dev/null
+++ b/examples/alsa_timed_audio/documentation/Doxyfile
@@ -0,0 +1,2386 @@
+# Doxyfile 1.8.9.1
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project.
+#
+# All text after a double hash (##) is considered a comment and is placed in
+# front of the TAG it is preceding.
+#
+# All text after a single hash (#) is considered a comment and will be ignored.
+# The format is:
+# TAG = value [value, ...]
+# For lists, items can also be appended using:
+# TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (\" \").
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# This tag specifies the encoding used for all characters in the config file
+# that follow. The default is UTF-8 which is also the encoding used for all text
+# before the first occurrence of this tag. Doxygen uses libiconv (or the iconv
+# built into libc) for the transcoding. See http://www.gnu.org/software/libiconv
+# for the list of possible encodings.
+# The default value is: UTF-8.
+
+DOXYFILE_ENCODING      = UTF-8
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by
+# double-quotes, unless you are using Doxywizard) that should identify the
+# project for which the documentation is generated. This name is used in the
+# title of most generated pages and in a few other places.
+# The default value is: My Project.
+
+PROJECT_NAME           = "Intel Synchronized Audio Toolkit"
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. This
+# could be handy for archiving the generated documentation or if some version
+# control system is used.
+
+PROJECT_NUMBER         =
+
+# Using the PROJECT_BRIEF tag one can provide an optional one line description
+# for a project that appears at the top of each page and should give viewer a
+# quick idea about the purpose of the project. Keep the description short.
+
+PROJECT_BRIEF          = "Determine location using time synchronized audio"
+
+# With the PROJECT_LOGO tag one can specify a logo or an icon that is included
+# in the documentation. The maximum height of the logo should not exceed 55
+# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
+# the logo to the output directory.
+
+PROJECT_LOGO           =
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
+# into which the generated documentation will be written. If a relative path is
+# entered, it will be relative to the location where doxygen was started. If
+# left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       =
+
+# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
+# directories (in 2 levels) under the output directory of each output format and
+# will distribute the generated files over these directories. Enabling this
+# option can be useful when feeding doxygen a huge amount of source files, where
+# putting all generated files in the same directory would otherwise causes
+# performance problems for the file system.
+# The default value is: NO.
+
+CREATE_SUBDIRS         = NO
+
+# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
+# characters to appear in the names of generated files. If set to NO, non-ASCII
+# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode
+# U+3044.
+# The default value is: NO.
+
+ALLOW_UNICODE_NAMES    = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all
+# documentation generated by doxygen is written. Doxygen will use this
+# information to generate all constant output in the proper language.
+# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese,
+# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States),
+# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian,
+# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages),
+# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian,
+# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian,
+# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish,
+# Ukrainian and Vietnamese.
+# The default value is: English.
+
+OUTPUT_LANGUAGE        = English
+
+# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member
+# descriptions after the members that are listed in the file and class
+# documentation (similar to Javadoc). Set to NO to disable this.
+# The default value is: YES.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
+# description of a member or function before the detailed description
+#
+# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
+# brief descriptions will be completely suppressed.
+# The default value is: YES.
+
+REPEAT_BRIEF           = YES
+
+# This tag implements a quasi-intelligent brief description abbreviator that is
+# used to form the text in various listings. Each string in this list, if found
+# as the leading text of the brief description, will be stripped from the text
+# and the result, after processing the whole list, is used as the annotated
+# text. Otherwise, the brief description is used as-is. If left blank, the
+# following values are used ($name is automatically replaced with the name of
+# the entity):The $name class, The $name widget, The $name file, is, provides,
+# specifies, contains, represents, a, an and the.
+
+ABBREVIATE_BRIEF       =
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
+# doxygen will generate a detailed section even if there is only a brief
+# description.
+# The default value is: NO.
+
+ALWAYS_DETAILED_SEC    = NO
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
+# inherited members of a class in the documentation of that class as if those
+# members were ordinary class members. Constructors, destructors and assignment
+# operators of the base classes will not be shown.
+# The default value is: NO.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path
+# before files name in the file list and in the header files. If set to NO the
+# shortest path that makes the file name unique will be used
+# The default value is: YES.
+
+FULL_PATH_NAMES        = YES
+
+# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path.
+# Stripping is only done if one of the specified strings matches the left-hand
+# part of the path. The tag can be used to show relative paths in the file list.
+# If left blank the directory from which doxygen is run is used as the path to
+# strip.
+#
+# Note that you can specify absolute paths here, but also relative paths, which
+# will be relative from the directory where doxygen is started.
+# This tag requires that the tag FULL_PATH_NAMES is set to YES.
+
+STRIP_FROM_PATH        = $(PROJECT_ROOT)
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
+# path mentioned in the documentation of a class, which tells the reader which
+# header file to include in order to use a class. If left blank only the name of
+# the header file containing the class definition is used. Otherwise one should
+# specify the list of include paths that are normally passed to the compiler
+# using the -I flag.
+
+STRIP_FROM_INC_PATH    =
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
+# less readable) file names. This can be useful is your file systems doesn't
+# support long names like on DOS, Mac, or CD-ROM.
+# The default value is: NO.
+
+SHORT_NAMES            = NO
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
+# first line (until the first dot) of a Javadoc-style comment as the brief
+# description. If set to NO, the Javadoc-style will behave just like regular Qt-
+# style comments (thus requiring an explicit @brief command for a brief
+# description.)
+# The default value is: NO.
+
+JAVADOC_AUTOBRIEF      = NO
+
+# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
+# line (until the first dot) of a Qt-style comment as the brief description. If
+# set to NO, the Qt-style will behave just like regular Qt-style comments (thus
+# requiring an explicit \brief command for a brief description.)
+# The default value is: NO.
+
+QT_AUTOBRIEF           = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
+# multi-line C++ special comment block (i.e. a block of //! or /// comments) as
+# a brief description. This used to be the default behavior. The new default is
+# to treat a multi-line C++ comment block as a detailed description. Set this
+# tag to YES if you prefer the old behavior instead.
+#
+# Note that setting this tag to YES also means that rational rose comments are
+# not recognized any more.
+# The default value is: NO.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the
+# documentation from any documented member that it re-implements.
+# The default value is: YES.
+
+INHERIT_DOCS           = YES
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new
+# page for each member. If set to NO, the documentation of a member will be part
+# of the file/class/namespace that contains it.
+# The default value is: NO.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
+# uses this value to replace tabs by spaces in code fragments.
+# Minimum value: 1, maximum value: 16, default value: 4.
+
+TAB_SIZE               = 4
+
+# This tag can be used to specify a number of aliases that act as commands in
+# the documentation. An alias has the form:
+# name=value
+# For example adding
+# "sideeffect=@par Side Effects:\n"
+# will allow you to put the command \sideeffect (or @sideeffect) in the
+# documentation, which will result in a user-defined paragraph with heading
+# "Side Effects:". You can put \n's in the value part of an alias to insert
+# newlines.
+
+ALIASES                =
+
+# This tag can be used to specify a number of word-keyword mappings (TCL only).
+# A mapping has the form "name=value". For example adding "class=itcl::class"
+# will allow you to use the command class in the itcl::class meaning.
+
+TCL_SUBST              =
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
+# only. Doxygen will then generate output that is more tailored for C. For
+# instance, some of the names that are used will be different. The list of all
+# members will be omitted, etc.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_FOR_C  = YES
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or
+# Python sources only. Doxygen will then generate output that is more tailored
+# for that language. For instance, namespaces will be presented as packages,
+# qualified scopes will look different, etc.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_JAVA   = YES
+
+# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
+# sources. Doxygen will then generate output that is tailored for Fortran.
+# The default value is: NO.
+
+OPTIMIZE_FOR_FORTRAN   = NO
+
+# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
+# sources. Doxygen will then generate output that is tailored for VHDL.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_VHDL   = NO
+
+# Doxygen selects the parser to use depending on the extension of the files it
+# parses. With this tag you can assign which parser to use for a given
+# extension. Doxygen has a built-in mapping, but you can override or extend it
+# using this tag. The format is ext=language, where ext is a file extension, and
+# language is one of the parsers supported by doxygen: IDL, Java, Javascript,
+# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran:
+# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran:
+# Fortran. In the later case the parser tries to guess whether the code is fixed
+# or free formatted code, this is the default for Fortran type files), VHDL. For
+# instance to make doxygen treat .inc files as Fortran files (default is PHP),
+# and .f files as C (default is Fortran), use: inc=Fortran f=C.
+#
+# Note: For files without extension you can use no_extension as a placeholder.
+#
+# Note that for custom extensions you also need to set FILE_PATTERNS otherwise
+# the files are not read by doxygen.
+
+EXTENSION_MAPPING      =
+
+# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
+# according to the Markdown format, which allows for more readable
+# documentation. See http://daringfireball.net/projects/markdown/ for details.
+# The output of markdown processing is further processed by doxygen, so you can
+# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in
+# case of backward compatibilities issues.
+# The default value is: YES.
+
+MARKDOWN_SUPPORT       = YES
+
+# When enabled doxygen tries to link words that correspond to documented
+# classes, or namespaces to their corresponding documentation. Such a link can
+# be prevented in individual cases by putting a % sign in front of the word or
+# globally by setting AUTOLINK_SUPPORT to NO.
+# The default value is: YES.
+
+AUTOLINK_SUPPORT       = YES
+
+# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
+# to include (a tag file for) the STL sources as input, then you should set this
+# tag to YES in order to let doxygen match functions declarations and
+# definitions whose arguments contain STL classes (e.g. func(std::string);
+# versus func(std::string) {}). This also make the inheritance and collaboration
+# diagrams that involve STL classes more complete and accurate.
+# The default value is: NO.
+
+BUILTIN_STL_SUPPORT    = NO
+
+# If you use Microsoft's C++/CLI language, you should set this option to YES to
+# enable parsing support.
+# The default value is: NO.
+
+CPP_CLI_SUPPORT        = NO
+
+# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
+# http://www.riverbankcomputing.co.uk/software/sip/intro) sources only. Doxygen
+# will parse them like normal C++ but will assume all classes use public instead
+# of private inheritance when no explicit protection keyword is present.
+# The default value is: NO.
+
+SIP_SUPPORT            = NO
+
+# For Microsoft's IDL there are propget and propput attributes to indicate
+# getter and setter methods for a property. Setting this option to YES will make
+# doxygen to replace the get and set methods by a property in the documentation.
+# This will only work if the methods are indeed getting or setting a simple
+# type. If this is not the case, or you want to show the methods anyway, you
+# should set this option to NO.
+# The default value is: YES.
+
+IDL_PROPERTY_SUPPORT   = YES
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
+# tag is set to YES then doxygen will reuse the documentation of the first
+# member in the group (if any) for the other members of the group. By default
+# all members of a group must be documented explicitly.
+# The default value is: NO.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# Set the SUBGROUPING tag to YES to allow class member groups of the same type
+# (for instance a group of public functions) to be put as a subgroup of that
+# type (e.g. under the Public Functions section). Set it to NO to prevent
+# subgrouping. Alternatively, this can be done per class using the
+# \nosubgrouping command.
+# The default value is: YES.
+
+SUBGROUPING            = YES
+
+# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions
+# are shown inside the group in which they are included (e.g. using \ingroup)
+# instead of on a separate page (for HTML and Man pages) or section (for LaTeX
+# and RTF).
+#
+# Note that this feature does not work in combination with
+# SEPARATE_MEMBER_PAGES.
+# The default value is: NO.
+
+INLINE_GROUPED_CLASSES = NO
+
+# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions
+# with only public data fields or simple typedef fields will be shown inline in
+# the documentation of the scope in which they are defined (i.e. file,
+# namespace, or group documentation), provided this scope is documented. If set
+# to NO, structs, classes, and unions are shown on a separate page (for HTML and
+# Man pages) or section (for LaTeX and RTF).
+# The default value is: NO.
+
+INLINE_SIMPLE_STRUCTS  = NO
+
+# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
+# enum is documented as struct, union, or enum with the name of the typedef. So
+# typedef struct TypeS {} TypeT, will appear in the documentation as a struct
+# with name TypeT. When disabled the typedef will appear as a member of a file,
+# namespace, or class. And the struct will be named TypeS. This can typically be
+# useful for C code in case the coding convention dictates that all compound
+# types are typedef'ed and only the typedef is referenced, never the tag name.
+# The default value is: NO.
+
+TYPEDEF_HIDES_STRUCT   = NO
+
+# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This
+# cache is used to resolve symbols given their name and scope. Since this can be
+# an expensive process and often the same symbol appears multiple times in the
+# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small
+# doxygen will become slower. If the cache is too large, memory is wasted. The
+# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range
+# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
+# symbols. At the end of a run doxygen will report the cache usage and suggest
+# the optimal cache size from a speed point of view.
+# Minimum value: 0, maximum value: 9, default value: 0.
+
+LOOKUP_CACHE_SIZE      = 0
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
+# documentation are documented, even if no documentation was available. Private
+# class members and static file members will be hidden unless the
+# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
+# Note: This will also disable the warnings about undocumented members that are
+# normally produced when WARNINGS is set to YES.
+# The default value is: NO.
+
+EXTRACT_ALL            = NO
+
+# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
+# be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PRIVATE        = NO
+
+# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal
+# scope will be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PACKAGE        = NO
+
+# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
+# included in the documentation.
+# The default value is: NO.
+
+EXTRACT_STATIC         = NO
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
+# locally in source files will be included in the documentation. If set to NO,
+# only classes defined in header files are included. Does not have any effect
+# for Java sources.
+# The default value is: YES.
+
+EXTRACT_LOCAL_CLASSES  = YES
+
+# This flag is only useful for Objective-C code. If set to YES, local methods,
+# which are defined in the implementation section but not in the interface are
+# included in the documentation. If set to NO, only methods in the interface are
+# included.
+# The default value is: NO.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If this flag is set to YES, the members of anonymous namespaces will be
+# extracted and appear in the documentation as a namespace called
+# 'anonymous_namespace{file}', where file will be replaced with the base name of
+# the file that contains the anonymous namespace. By default anonymous namespace
+# are hidden.
+# The default value is: NO.
+
+EXTRACT_ANON_NSPACES   = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
+# undocumented members inside documented classes or files. If set to NO these
+# members will be included in the various overviews, but no documentation
+# section is generated. This option has no effect if EXTRACT_ALL is enabled.
+# The default value is: NO.
+
+HIDE_UNDOC_MEMBERS     = NO
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
+# undocumented classes that are normally visible in the class hierarchy. If set
+# to NO, these classes will be included in the various overviews. This option
+# has no effect if EXTRACT_ALL is enabled.
+# The default value is: NO.
+
+HIDE_UNDOC_CLASSES     = NO
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend
+# (class|struct|union) declarations. If set to NO, these declarations will be
+# included in the documentation.
+# The default value is: NO.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
+# documentation blocks found inside the body of a function. If set to NO, these
+# blocks will be appended to the function's detailed documentation block.
+# The default value is: NO.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation that is typed after a
+# \internal command is included. If the tag is set to NO then the documentation
+# will be excluded. Set it to YES to include the internal documentation.
+# The default value is: NO.
+
+INTERNAL_DOCS          = NO
+
+# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file
+# names in lower-case letters. If set to YES, upper-case letters are also
+# allowed. This is useful if you have classes or files whose names only differ
+# in case and if your file system supports case sensitive file names. Windows
+# and Mac users are advised to set this option to NO.
+# The default value is: system dependent.
+
+CASE_SENSE_NAMES       = YES
+
+# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with
+# their full class and namespace scopes in the documentation. If set to YES, the
+# scope will be hidden.
+# The default value is: NO.
+
+HIDE_SCOPE_NAMES       = NO
+
+# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will
+# append additional text to a page's title, such as Class Reference. If set to
+# YES the compound reference will be hidden.
+# The default value is: NO.
+
+HIDE_COMPOUND_REFERENCE= NO
+
+# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
+# the files that are included by a file in the documentation of that file.
+# The default value is: YES.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each
+# grouped member an include statement to the documentation, telling the reader
+# which file to include in order to use the member.
+# The default value is: NO.
+
+SHOW_GROUPED_MEMB_INC  = NO
+
+# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include
+# files with double quotes in the documentation rather than with sharp brackets.
+# The default value is: NO.
+
+FORCE_LOCAL_INCLUDES   = NO
+
+# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the
+# documentation for inline members.
+# The default value is: YES.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
+# (detailed) documentation of file and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order.
+# The default value is: YES.
+
+SORT_MEMBER_DOCS       = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
+# descriptions of file, namespace and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order. Note that
+# this will also influence the order of the classes in the class list.
+# The default value is: NO.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
+# (brief and detailed) documentation of class members so that constructors and
+# destructors are listed first. If set to NO the constructors will appear in the
+# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
+# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief
+# member documentation.
+# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
+# detailed member documentation.
+# The default value is: NO.
+
+SORT_MEMBERS_CTORS_1ST = NO
+
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
+# of group names into alphabetical order. If set to NO the group names will
+# appear in their defined order.
+# The default value is: NO.
+
+SORT_GROUP_NAMES       = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
+# fully-qualified names, including namespaces. If set to NO, the class list will
+# be sorted only by class name, not including the namespace part.
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
+# Note: This option applies only to the class list, not to the alphabetical
+# list.
+# The default value is: NO.
+
+SORT_BY_SCOPE_NAME     = NO
+
+# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper
+# type resolution of all parameters of a function it will reject a match between
+# the prototype and the implementation of a member function even if there is
+# only one candidate or it is obvious which candidate to choose by doing a
+# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
+# accept a match between prototype and implementation in such cases.
+# The default value is: NO.
+
+STRICT_PROTO_MATCHING  = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo
+# list. This list is created by putting \todo commands in the documentation.
+# The default value is: YES.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test
+# list. This list is created by putting \test commands in the documentation.
+# The default value is: YES.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug
+# list. This list is created by putting \bug commands in the documentation.
+# The default value is: YES.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO)
+# the deprecated list. This list is created by putting \deprecated commands in
+# the documentation.
+# The default value is: YES.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional documentation
+# sections, marked by \if <section_label> ... \endif and \cond <section_label>
+# ... \endcond blocks.
+
+ENABLED_SECTIONS       =
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
+# initial value of a variable or macro / define can have for it to appear in the
+# documentation. If the initializer consists of more lines than specified here
+# it will be hidden. Use a value of 0 to hide initializers completely. The
+# appearance of the value of individual variables and macros / defines can be
+# controlled using \showinitializer or \hideinitializer command in the
+# documentation regardless of this setting.
+# Minimum value: 0, maximum value: 10000, default value: 30.
+
+MAX_INITIALIZER_LINES  = 30
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at
+# the bottom of the documentation of classes and structs. If set to YES, the
+# list will mention the files that were used to generate the documentation.
+# The default value is: YES.
+
+SHOW_USED_FILES        = YES
+
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This
+# will remove the Files entry from the Quick Index and from the Folder Tree View
+# (if specified).
+# The default value is: YES.
+
+SHOW_FILES             = YES
+
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces
+# page. This will remove the Namespaces entry from the Quick Index and from the
+# Folder Tree View (if specified).
+# The default value is: YES.
+
+SHOW_NAMESPACES        = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that
+# doxygen should invoke to get the current version for each file (typically from
+# the version control system). Doxygen will invoke the program by executing (via
+# popen()) the command command input-file, where command is the value of the
+# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided
+# by doxygen. Whatever the program writes to standard output is used as the file
+# version. For an example see the documentation.
+
+FILE_VERSION_FILTER    =
+
+# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed
+# by doxygen. The layout file controls the global structure of the generated
+# output files in an output format independent way. To create the layout file
+# that represents doxygen's defaults, run doxygen with the -l option. You can
+# optionally specify a file name after the option, if omitted DoxygenLayout.xml
+# will be used as the name of the layout file.
+#
+# Note that if you run doxygen from a directory containing a file called
+# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE
+# tag is left empty.
+
+LAYOUT_FILE            =
+
+# The CITE_BIB_FILES tag can be used to specify one or more bib files containing
+# the reference definitions. This must be a list of .bib files. The .bib
+# extension is automatically appended if omitted. This requires the bibtex tool
+# to be installed. See also http://en.wikipedia.org/wiki/BibTeX for more info.
+# For LaTeX the style of the bibliography can be controlled using
+# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
+# search path. See also \cite for info how to create references.
+
+CITE_BIB_FILES         =
+
+#---------------------------------------------------------------------------
+# Configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated to
+# standard output by doxygen. If QUIET is set to YES this implies that the
+# messages are off.
+# The default value is: NO.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are
+# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
+# this implies that the warnings are on.
+#
+# Tip: Turn warnings on while writing the documentation.
+# The default value is: YES.
+
+WARNINGS               = YES
+
+# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
+# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag
+# will automatically be disabled.
+# The default value is: YES.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
+# potential errors in the documentation, such as not documenting some parameters
+# in a documented function, or documenting parameters that don't exist or using
+# markup commands wrongly.
+# The default value is: YES.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
+# are documented, but have no documentation for their parameters or return
+# value. If set to NO, doxygen will only warn about wrong or incomplete
+# parameter documentation, but not about the absence of documentation.
+# The default value is: NO.
+
+WARN_NO_PARAMDOC       = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that doxygen
+# can produce. The string should contain the $file, $line, and $text tags, which
+# will be replaced by the file and line number from which the warning originated
+# and the warning text. Optionally the format may contain $version, which will
+# be replaced by the version of the file (if it could be obtained via
+# FILE_VERSION_FILTER)
+# The default value is: $file:$line: $text.
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning and error
+# messages should be written. If left blank the output is written to standard
+# error (stderr).
+
+WARN_LOGFILE           =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag is used to specify the files and/or directories that contain
+# documented source files. You may enter file names like myfile.cpp or
+# directories like /usr/src/myproject. Separate the files or directories with
+# spaces.
+# Note: If this tag is empty the current directory is searched.
+
+INPUT                  = $(SRC_DIR) \
+	$(SRC_DIR)/support/RangingDemo/RangingDemo.py \
+	$(SRC_DIR)/support/RangingDemo/timesync.py
+
+# This tag can be used to specify the character encoding of the source files
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
+# libiconv (or the iconv built into libc) for the transcoding. See the libiconv
+# documentation (see: http://www.gnu.org/software/libiconv) for the list of
+# possible encodings.
+# The default value is: UTF-8.
+
+INPUT_ENCODING         = UTF-8
+
+# If the value of the INPUT tag contains directories, you can use the
+# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
+# *.h) to filter out the source-files in the directories. If left blank the
+# following patterns are tested:*.c, *.cc, *.cxx, *.cpp, *.c++, *.java, *.ii,
+# *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h, *.hh, *.hxx, *.hpp,
+# *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc, *.m, *.markdown,
+# *.md, *.mm, *.dox, *.py, *.f90, *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf,
+# *.qsf, *.as and *.js.
+
+FILE_PATTERNS          =
+
+# The RECURSIVE tag can be used to specify whether or not subdirectories should
+# be searched for input files as well.
+# The default value is: NO.
+
+RECURSIVE              = NO
+
+# The EXCLUDE tag can be used to specify files and/or directories that should be
+# excluded from the INPUT source files. This way you can easily exclude a
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+#
+# Note that relative paths are relative to the directory from which doxygen is
+# run.
+
+EXCLUDE                =
+
+# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
+# directories that are symbolic links (a Unix file system feature) are excluded
+# from the input.
+# The default value is: NO.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
+# certain files from those directories.
+#
+# Note that the wildcards are matched against the file with absolute path, so to
+# exclude all test directories for example use the pattern */test/*
+
+EXCLUDE_PATTERNS       =
+
+# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
+# (namespaces, classes, functions, etc.) that should be excluded from the
+# output. The symbol name can be a fully qualified name, a word, or if the
+# wildcard * is used, a substring. Examples: ANamespace, AClass,
+# AClass::ANamespace, ANamespace::*Test
+#
+# Note that the wildcards are matched against the file with absolute path, so to
+# exclude all test directories use the pattern */test/*
+
+EXCLUDE_SYMBOLS        =
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or directories
+# that contain example code fragments that are included (see the \include
+# command).
+
+EXAMPLE_PATH           =
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
+# *.h) to filter out the source-files in the directories. If left blank all
+# files are included.
+
+EXAMPLE_PATTERNS       =
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
+# searched for input files to be used with the \include or \dontinclude commands
+# irrespective of the value of the RECURSIVE tag.
+# The default value is: NO.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or directories
+# that contain images that are to be included in the documentation (see the
+# \image command).
+
+IMAGE_PATH             =
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should
+# invoke to filter for each input file. Doxygen will invoke the filter program
+# by executing (via popen()) the command:
+#
+# <filter> <input-file>
+#
+# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the
+# name of an input file. Doxygen will then use the output that the filter
+# program writes to standard output. If FILTER_PATTERNS is specified, this tag
+# will be ignored.
+#
+# Note that the filter must not add or remove lines; it is applied before the
+# code is scanned, but not when the output code is generated. If lines are added
+# or removed, the anchors will not be placed correctly.
+
+INPUT_FILTER           =
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
+# basis. Doxygen will compare the file name with each pattern and apply the
+# filter if there is a match. The filters are a list of the form: pattern=filter
+# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how
+# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
+# patterns match the file name, INPUT_FILTER is applied.
+
+FILTER_PATTERNS        =
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
+# INPUT_FILTER) will also be used to filter the input files that are used for
+# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES).
+# The default value is: NO.
+
+FILTER_SOURCE_FILES    = NO
+
+# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file
+# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and
+# it is also possible to disable source filtering for a specific pattern using
+# *.ext= (so without naming a filter).
+# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
+
+FILTER_SOURCE_PATTERNS =
+
+# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that
+# is part of the input, its contents will be placed on the main page
+# (index.html). This can be useful if you have a project on for instance GitHub
+# and want to reuse the introduction page also for the doxygen output.
+
+USE_MDFILE_AS_MAINPAGE = $(SRC_DIR)/README.md
+
+#---------------------------------------------------------------------------
+# Configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will be
+# generated. Documented entities will be cross-referenced with these sources.
+#
+# Note: To get rid of all source code in the generated output, make sure that
+# also VERBATIM_HEADERS is set to NO.
+# The default value is: NO.
+
+SOURCE_BROWSER         = NO
+
+# Setting the INLINE_SOURCES tag to YES will include the body of functions,
+# classes and enums directly into the documentation.
+# The default value is: NO.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any
+# special comment blocks from generated source code fragments. Normal C, C++ and
+# Fortran comments will always remain visible.
+# The default value is: YES.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
+# function all documented functions referencing it will be listed.
+# The default value is: NO.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES then for each documented function
+# all documented entities called/used by that function will be listed.
+# The default value is: NO.
+
+REFERENCES_RELATION    = NO
+
+# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set
+# to YES then the hyperlinks from functions in REFERENCES_RELATION and
+# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will
+# link to the documentation.
+# The default value is: YES.
+
+REFERENCES_LINK_SOURCE = YES
+
+# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the
+# source code will show a tooltip with additional information such as prototype,
+# brief description and links to the definition and documentation. Since this
+# will make the HTML file larger and loading of large files a bit slower, you
+# can opt to disable this feature.
+# The default value is: YES.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
+
+SOURCE_TOOLTIPS        = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code will
+# point to the HTML generated by the htags(1) tool instead of doxygen built-in
+# source browser. The htags tool is part of GNU's global source tagging system
+# (see http://www.gnu.org/software/global/global.html). You will need version
+# 4.8.6 or higher.
+#
+# To use it do the following:
+# - Install the latest version of global
+# - Enable SOURCE_BROWSER and USE_HTAGS in the config file
+# - Make sure the INPUT points to the root of the source tree
+# - Run doxygen as normal
+#
+# Doxygen will invoke htags (and that will in turn invoke gtags), so these
+# tools must be available from the command line (i.e. in the search path).
+#
+# The result: instead of the source browser generated by doxygen, the links to
+# source code will now point to the output of htags.
+# The default value is: NO.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
+
+USE_HTAGS              = NO
+
+# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
+# verbatim copy of the header file for each class for which an include is
+# specified. Set to NO to disable this.
+# See also: Section \class.
+# The default value is: YES.
+
+VERBATIM_HEADERS       = YES
+
+# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the
+# clang parser (see: http://clang.llvm.org/) for more accurate parsing at the
+# cost of reduced performance. This can be particularly helpful with template
+# rich C++ code for which doxygen's built-in parser lacks the necessary type
+# information.
+# Note: The availability of this option depends on whether or not doxygen was
+# compiled with the --with-libclang option.
+# The default value is: NO.
+
+CLANG_ASSISTED_PARSING = NO
+
+# If clang assisted parsing is enabled you can provide the compiler with command
+# line options that you would normally use when invoking the compiler. Note that
+# the include paths will already be set by doxygen for the files and directories
+# specified with INPUT and INCLUDE_PATH.
+# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
+
+CLANG_OPTIONS          =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
+# compounds will be generated. Enable this if the project contains a lot of
+# classes, structs, unions or interfaces.
+# The default value is: YES.
+
+ALPHABETICAL_INDEX     = YES
+
+# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
+# which the alphabetical index list will be split.
+# Minimum value: 1, maximum value: 20, default value: 5.
+# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
+
+COLS_IN_ALPHA_INDEX    = 5
+
+# In case all classes in a project start with a common prefix, all classes will
+# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
+# can be used to specify a prefix (or a list of prefixes) that should be ignored
+# while generating the index headers.
+# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
+
+IGNORE_PREFIX          =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
+# The default value is: YES.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
+# generated HTML page (for example: .htm, .php, .asp).
+# The default value is: .html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a user-defined HTML header file for
+# each generated HTML page. If the tag is left blank doxygen will generate a
+# standard header.
+#
+# To get valid HTML the header file that includes any scripts and style sheets
+# that doxygen needs, which is dependent on the configuration options used (e.g.
+# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
+# default header using
+# doxygen -w html new_header.html new_footer.html new_stylesheet.css
+# YourConfigFile
+# and then modify the file new_header.html. See also section "Doxygen usage"
+# for information on how to generate the default header that doxygen normally
+# uses.
+# Note: The header is subject to change so you typically have to regenerate the
+# default header when upgrading to a newer version of doxygen. For a description
+# of the possible markers and block names see the documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_HEADER            =
+
+# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
+# generated HTML page. If the tag is left blank doxygen will generate a standard
+# footer. See HTML_HEADER for more information on how to generate a default
+# footer and what special commands can be used inside the footer. See also
+# section "Doxygen usage" for information on how to generate the default footer
+# that doxygen normally uses.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_FOOTER            =
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
+# sheet that is used by each HTML page. It can be used to fine-tune the look of
+# the HTML output. If left blank doxygen will generate a default style sheet.
+# See also section "Doxygen usage" for information on how to generate the style
+# sheet that doxygen normally uses.
+# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as
+# it is more robust and this tag (HTML_STYLESHEET) will in the future become
+# obsolete.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_STYLESHEET        =
+
+# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# cascading style sheets that are included after the standard style sheets
+# created by doxygen. Using this option one can overrule certain style aspects.
+# This is preferred over using HTML_STYLESHEET since it does not replace the
+# standard style sheet and is therefore more robust against future updates.
+# Doxygen will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list). For an example see the documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_STYLESHEET  =
+
+# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the HTML output directory. Note
+# that these files will be copied to the base HTML output directory. Use the
+# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
+# files. In the HTML_STYLESHEET file, use the file name only. Also note that the
+# files will be copied as-is; there are no commands or markers available.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_FILES       =
+
+# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
+# will adjust the colors in the style sheet and background images according to
+# this color. Hue is specified as an angle on a colorwheel, see
+# http://en.wikipedia.org/wiki/Hue for more information. For instance the value
+# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300
+# purple, and 360 is red again.
+# Minimum value: 0, maximum value: 359, default value: 220.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_HUE    = 220
+
+# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
+# in the HTML output. For a value of 0 the output will use grayscales only. A
+# value of 255 will produce the most vivid colors.
+# Minimum value: 0, maximum value: 255, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_SAT    = 100
+
+# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
+# luminance component of the colors in the HTML output. Values below 100
+# gradually make the output lighter, whereas values above 100 make the output
+# darker. The value divided by 100 is the actual gamma applied, so 80 represents
+# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
+# change the gamma.
+# Minimum value: 40, maximum value: 240, default value: 80.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_GAMMA  = 80
+
+# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
+# page will contain the date and time when the page was generated. Setting this
+# to YES can help to show when doxygen was last run and thus if the
+# documentation is up to date.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_TIMESTAMP         = NO
+
+# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
+# documentation will contain sections that can be hidden and shown after the
+# page has loaded.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_DYNAMIC_SECTIONS  = NO
+
+# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
+# shown in the various tree structured indices initially; the user can expand
+# and collapse entries dynamically later on. Doxygen will expand the tree to
+# such a level that at most the specified number of entries are visible (unless
+# a fully collapsed tree already exceeds this amount). So setting the number of
+# entries 1 will produce a full collapsed tree by default. 0 is a special value
+# representing an infinite number of entries and will result in a full expanded
+# tree by default.
+# Minimum value: 0, maximum value: 9999, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_INDEX_NUM_ENTRIES = 100
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files will be
+# generated that can be used as input for Apple's Xcode 3 integrated development
+# environment (see: http://developer.apple.com/tools/xcode/), introduced with
+# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
+# Makefile in the HTML output directory. Running make will produce the docset in
+# that directory and running make install will install the docset in
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
+# startup. See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html
+# for more information.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_DOCSET        = NO
+
+# This tag determines the name of the docset feed. A documentation feed provides
+# an umbrella under which multiple documentation sets from a single provider
+# (such as a company or product suite) can be grouped.
+# The default value is: Doxygen generated docs.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_FEEDNAME        = "Doxygen generated docs"
+
+# This tag specifies a string that should uniquely identify the documentation
+# set bundle. This should be a reverse domain-name style string, e.g.
+# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_BUNDLE_ID       = org.doxygen.Project
+
+# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify
+# the documentation publisher. This should be a reverse domain-name style
+# string, e.g. com.mycompany.MyDocSet.documentation.
+# The default value is: org.doxygen.Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
+
+# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
+# The default value is: Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_NAME  = Publisher
+
+# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
+# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
+# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
+# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on
+# Windows.
+#
+# The HTML Help Workshop contains a compiler that can convert all HTML output
+# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML
+# files are now used as the Windows 98 help format, and will replace the old
+# Windows help format (.hlp) on all Windows platforms in the future. Compressed
+# HTML files also contain an index, a table of contents, and you can search for
+# words in the documentation. The HTML workshop also contains a viewer for
+# compressed HTML files.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_HTMLHELP      = NO
+
+# The CHM_FILE tag can be used to specify the file name of the resulting .chm
+# file. You can add a path in front of the file if the result should not be
+# written to the html output directory.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+CHM_FILE               =
+
+# The HHC_LOCATION tag can be used to specify the location (absolute path
+# including file name) of the HTML help compiler (hhc.exe). If non-empty,
+# doxygen will try to run the HTML help compiler on the generated index.hhp.
+# The file has to be specified with full path.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+HHC_LOCATION           =
+
+# The GENERATE_CHI flag controls if a separate .chi index file is generated
+# (YES) or that it should be included in the master .chm file (NO).
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+GENERATE_CHI           = NO
+
+# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc)
+# and project file content.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+CHM_INDEX_ENCODING     =
+
+# The BINARY_TOC flag controls whether a binary table of contents is generated
+# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
+# enables the Previous and Next buttons.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members to
+# the table of contents of the HTML help documentation and to the tree view.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
+
+TOC_EXPAND             = NO
+
+# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
+# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
+# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help
+# (.qch) of the generated HTML documentation.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_QHP           = NO
+
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify
+# the file name of the resulting .qch file. The path specified is relative to
+# the HTML output folder.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QCH_FILE               =
+
+# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help
+# Project output. For more information please see Qt Help Project / Namespace
+# (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#namespace).
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_NAMESPACE          = org.doxygen.Project
+
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt
+# Help Project output. For more information please see Qt Help Project / Virtual
+# Folders (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#virtual-
+# folders).
+# The default value is: doc.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_VIRTUAL_FOLDER     = doc
+
+# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
+# filter to add. For more information please see Qt Help Project / Custom
+# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
+# filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_CUST_FILTER_NAME   =
+
+# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
+# custom filter to add. For more information please see Qt Help Project / Custom
+# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
+# filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_CUST_FILTER_ATTRS  =
+
+# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
+# project's filter section matches. Qt Help Project / Filter Attributes (see:
+# http://qt-project.org/doc/qt-4.8/qthelpproject.html#filter-attributes).
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHP_SECT_FILTER_ATTRS  =
+
+# The QHG_LOCATION tag can be used to specify the location of Qt's
+# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the
+# generated .qhp file.
+# This tag requires that the tag GENERATE_QHP is set to YES.
+
+QHG_LOCATION           =
+
+# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be
+# generated, together with the HTML files, they form an Eclipse help plugin. To
+# install this plugin and make it available under the help contents menu in
+# Eclipse, the contents of the directory containing the HTML and XML files needs
+# to be copied into the plugins directory of eclipse. The name of the directory
+# within the plugins directory should be the same as the ECLIPSE_DOC_ID value.
+# After copying Eclipse needs to be restarted before the help appears.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_ECLIPSEHELP   = NO
+
+# A unique identifier for the Eclipse help plugin. When installing the plugin
+# the directory name containing the HTML and XML files should also have this
+# name. Each documentation set should have its own identifier.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
+
+ECLIPSE_DOC_ID         = org.doxygen.Project
+
+# If you want full control over the layout of the generated HTML pages it might
+# be necessary to disable the index and replace it with your own. The
+# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top
+# of each HTML page. A value of NO enables the index and the value YES disables
+# it. Since the tabs in the index contain the same information as the navigation
+# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+DISABLE_INDEX          = NO
+
+# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
+# structure should be generated to display hierarchical information. If the tag
+# value is set to YES, a side panel will be generated containing a tree-like
+# index structure (just like the one that is generated for HTML Help). For this
+# to work a browser that supports JavaScript, DHTML, CSS and frames is required
+# (i.e. any modern browser). Windows users are probably better off using the
+# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can
+# further fine-tune the look of the index. As an example, the default style
+# sheet generated by doxygen has an example that shows how to put an image at
+# the root of the tree instead of the PROJECT_NAME. Since the tree basically has
+# the same information as the tab index, you could consider setting
+# DISABLE_INDEX to YES when enabling this option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+GENERATE_TREEVIEW      = NO
+
+# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
+# doxygen will group on one line in the generated HTML documentation.
+#
+# Note that a value of 0 will completely suppress the enum values from appearing
+# in the overview section.
+# Minimum value: 0, maximum value: 20, default value: 4.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used
+# to set the initial width (in pixels) of the frame in which the tree is shown.
+# Minimum value: 0, maximum value: 1500, default value: 250.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+TREEVIEW_WIDTH         = 250
+
+# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
+# external symbols imported via tag files in a separate window.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+EXT_LINKS_IN_WINDOW    = NO
+
+# Use this tag to change the font size of LaTeX formulas included as images in
+# the HTML documentation. When you change the font size after a successful
+# doxygen run you need to manually remove any form_*.png images from the HTML
+# output directory to force them to be regenerated.
+# Minimum value: 8, maximum value: 50, default value: 10.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+FORMULA_FONTSIZE       = 10
+
+# Use the FORMULA_TRANPARENT tag to determine whether or not the images
+# generated for formulas are transparent PNGs. Transparent PNGs are not
+# supported properly for IE 6.0, but are supported on all modern browsers.
+#
+# Note that when changing this option you need to delete any form_*.png files in
+# the HTML output directory before the changes have effect.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+FORMULA_TRANSPARENT    = YES
+
+# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
+# http://www.mathjax.org) which uses client side Javascript for the rendering
+# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
+# installed or if you want to formulas look prettier in the HTML output. When
+# enabled you may also need to install MathJax separately and configure the path
+# to it using the MATHJAX_RELPATH option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+USE_MATHJAX            = NO
+
+# When MathJax is enabled you can set the default output format to be used for
+# the MathJax output. See the MathJax site (see:
+# http://docs.mathjax.org/en/latest/output.html) for more details.
+# Possible values are: HTML-CSS (which is slower, but has the best
+# compatibility), NativeMML (i.e. MathML) and SVG.
+# The default value is: HTML-CSS.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_FORMAT         = HTML-CSS
+
+# When MathJax is enabled you need to specify the location relative to the HTML
+# output directory using the MATHJAX_RELPATH option. The destination directory
+# should contain the MathJax.js script. For instance, if the mathjax directory
+# is located at the same level as the HTML output directory, then
+# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
+# Content Delivery Network so you can quickly see the result without installing
+# MathJax. However, it is strongly recommended to install a local copy of
+# MathJax from http://www.mathjax.org before deployment.
+# The default value is: http://cdn.mathjax.org/mathjax/latest.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
+
+# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
+# extension names that should be enabled during MathJax rendering. For example
+# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_EXTENSIONS     =
+
+# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
+# of code that will be used on startup of the MathJax code. See the MathJax site
+# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an
+# example see the documentation.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_CODEFILE       =
+
+# When the SEARCHENGINE tag is enabled doxygen will generate a search box for
+# the HTML output. The underlying search engine uses javascript and DHTML and
+# should work on any modern browser. Note that when using HTML help
+# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
+# there is already a search function so this one should typically be disabled.
+# For large projects the javascript based search engine can be slow, then
+# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to
+# search using the keyboard; to jump to the search box use <access key> + S
+# (what the <access key> is depends on the OS and browser, but it is typically
+# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down
+# key> to jump into the search results window, the results can be navigated
+# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel
+# the search. The filter options can be selected when the cursor is inside the
+# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys>
+# to select a filter and <Enter> or <escape> to activate or cancel the filter
+# option.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+SEARCHENGINE           = YES
+
+# When the SERVER_BASED_SEARCH tag is enabled the search engine will be
+# implemented using a web server instead of a web client using Javascript. There
+# are two flavors of web server based searching depending on the EXTERNAL_SEARCH
+# setting. When disabled, doxygen will generate a PHP script for searching and
+# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing
+# and searching needs to be provided by external tools. See the section
+# "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SERVER_BASED_SEARCH    = NO
+
+# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP
+# script for searching. Instead the search results are written to an XML file
+# which needs to be processed by an external indexer. Doxygen will invoke an
+# external search engine pointed to by the SEARCHENGINE_URL option to obtain the
+# search results.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see: http://xapian.org/).
+#
+# See the section "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH        = NO
+
+# The SEARCHENGINE_URL should point to a search engine hosted by a web server
+# which will return the search results when EXTERNAL_SEARCH is enabled.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see: http://xapian.org/). See the section "External Indexing and
+# Searching" for details.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHENGINE_URL       =
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
+# search data is written to a file for indexing by an external tool. With the
+# SEARCHDATA_FILE tag the name of this file can be specified.
+# The default file is: searchdata.xml.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHDATA_FILE        = searchdata.xml
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
+# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is
+# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple
+# projects and redirect the results back to the right project.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH_ID     =
+
+# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen
+# projects other than the one defined by this configuration file, but that are
+# all added to the same external search index. Each project needs to have a
+# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of
+# to a relative location where the documentation can be found. The format is:
+# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTRA_SEARCH_MAPPINGS  =
+
+#---------------------------------------------------------------------------
+# Configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
+# The default value is: YES.
+
+GENERATE_LATEX         = YES
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: latex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
+# invoked.
+#
+# Note that when enabling USE_PDFLATEX this option is only used for generating
+# bitmaps for formulas in the HTML output, but not in the Makefile that is
+# written to the output directory.
+# The default file is: latex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate
+# index for LaTeX.
+# The default file is: makeindex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+COMPACT_LATEX          = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used by the
+# printer.
+# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x
+# 14 inches) and executive (7.25 x 10.5 inches).
+# The default value is: a4.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+PAPER_TYPE             = a4
+
+# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names
+# that should be included in the LaTeX output. To get the times font for
+# instance you can specify
+# EXTRA_PACKAGES=times
+# If left blank no extra packages will be included.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+EXTRA_PACKAGES         =
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for the
+# generated LaTeX document. The header should contain everything until the first
+# chapter. If it is left blank doxygen will generate a standard header. See
+# section "Doxygen usage" for information on how to let doxygen write the
+# default header to a separate file.
+#
+# Note: Only use a user-defined header if you know what you are doing! The
+# following commands have a special meaning inside the header: $title,
+# $datetime, $date, $doxygenversion, $projectname, $projectnumber,
+# $projectbrief, $projectlogo. Doxygen will replace $title with the empty
+# string, for the replacement values of the other commands the user is referred
+# to HTML_HEADER.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_HEADER           =
+
+# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for the
+# generated LaTeX document. The footer should contain everything after the last
+# chapter. If it is left blank doxygen will generate a standard footer. See
+# LATEX_HEADER for more information on how to generate a default footer and what
+# special commands can be used inside the footer.
+#
+# Note: Only use a user-defined footer if you know what you are doing!
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_FOOTER           =
+
+# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# LaTeX style sheets that are included after the standard style sheets created
+# by doxygen. Using this option one can overrule certain style aspects. Doxygen
+# will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list).
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_STYLESHEET =
+
+# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the LATEX_OUTPUT output
+# directory. Note that the files will be copied as-is; there are no commands or
+# markers available.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_FILES      =
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
+# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will
+# contain links (just like the HTML output) instead of page references. This
+# makes the output suitable for online browsing using a PDF viewer.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to generate
+# the PDF file directly from the LaTeX files. Set this option to YES, to get a
+# higher quality PDF documentation.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode
+# command to the generated LaTeX files. This will instruct LaTeX to keep running
+# if errors occur, instead of asking the user for help. This option is also used
+# when generating formulas in HTML.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_BATCHMODE        = NO
+
+# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the
+# index chapters (such as File Index, Compound Index, etc.) in the output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_HIDE_INDICES     = NO
+
+# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include source
+# code with syntax highlighting in the LaTeX output.
+#
+# Note that which sources are shown also depends on other settings such as
+# SOURCE_BROWSER.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_SOURCE_CODE      = NO
+
+# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
+# bibliography, e.g. plainnat, or ieeetr. See
+# http://en.wikipedia.org/wiki/BibTeX and \cite for more info.
+# The default value is: plain.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_BIB_STYLE        = plain
+
+#---------------------------------------------------------------------------
+# Configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The
+# RTF output is optimized for Word 97 and may not look too pretty with other RTF
+# readers/editors.
+# The default value is: NO.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: rtf.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
+# contain hyperlink fields. The RTF file will contain links (just like the HTML
+# output) instead of page references. This makes the output suitable for online
+# browsing using Word or some other Word compatible readers that support those
+# fields.
+#
+# Note: WordPad (write) and others do not support links.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's config
+# file, i.e. a series of assignments. You only have to provide replacements,
+# missing definitions are set to their default value.
+#
+# See also section "Doxygen usage" for information on how to generate the
+# default style sheet that doxygen normally uses.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_STYLESHEET_FILE    =
+
+# Set optional variables used in the generation of an RTF document. Syntax is
+# similar to doxygen's config file. A template extensions file can be generated
+# using doxygen -e rtf extensionFile.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_EXTENSIONS_FILE    =
+
+# If the RTF_SOURCE_CODE tag is set to YES then doxygen will include source code
+# with syntax highlighting in the RTF output.
+#
+# Note that which sources are shown also depends on other settings such as
+# SOURCE_BROWSER.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
+
+RTF_SOURCE_CODE        = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
+# classes and files.
+# The default value is: NO.
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it. A directory man3 will be created inside the directory specified by
+# MAN_OUTPUT.
+# The default directory is: man.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to the generated
+# man pages. In case the manual section does not start with a number, the number
+# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
+# optional.
+# The default value is: .3.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_EXTENSION          = .3
+
+# The MAN_SUBDIR tag determines the name of the directory created within
+# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by
+# MAN_EXTENSION with the initial . removed.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_SUBDIR             =
+
+# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it
+# will generate one additional man file for each entity documented in the real
+# man page(s). These additional files only source the real man page, but without
+# them the man command would be unable to find the correct page.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# Configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that
+# captures the structure of the code including all documentation.
+# The default value is: NO.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: xml.
+# This tag requires that the tag GENERATE_XML is set to YES.
+
+XML_OUTPUT             = xml
+
+# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
+# listings (including syntax highlighting and cross-referencing information) to
+# the XML output. Note that enabling this will significantly increase the size
+# of the XML output.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_XML is set to YES.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# Configuration options related to the DOCBOOK output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files
+# that can be used to generate PDF.
+# The default value is: NO.
+
+GENERATE_DOCBOOK       = NO
+
+# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
+# front of it.
+# The default directory is: docbook.
+# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
+
+DOCBOOK_OUTPUT         = docbook
+
+# If the DOCBOOK_PROGRAMLISTING tag is set to YES, doxygen will include the
+# program listings (including syntax highlighting and cross-referencing
+# information) to the DOCBOOK output. Note that enabling this will significantly
+# increase the size of the DOCBOOK output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
+
+DOCBOOK_PROGRAMLISTING = NO
+
+#---------------------------------------------------------------------------
+# Configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
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+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
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+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
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+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
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+PREDEFINED             =
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+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
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+# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor will
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+SKIP_FUNCTION_MACROS   = YES
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+#---------------------------------------------------------------------------
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+# The TAGFILES tag can be used to specify one or more tag files. For each tag
+# file the location of the external documentation should be added. The format of
+# a tag file without this location is as follows:
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+# of tag files.
+# Note: Each tag file must have a unique name (where the name does NOT include
+# the path). If a tag file is not located in the directory in which doxygen is
+# run, you must also specify the path to the tagfile here.
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+TAGFILES               =
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create a
+# tag file that is based on the input files it reads. See section "Linking to
+# external documentation" for more information about the usage of tag files.
+
+GENERATE_TAGFILE       =
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+# If the ALLEXTERNALS tag is set to YES, all external class will be listed in
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+
+# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed
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+EXTERNAL_GROUPS        = YES
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+# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in
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+# The PERL_PATH should be the absolute path and name of the perl script
+# interpreter (i.e. the result of 'which perl').
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+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
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+# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram
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+# powerful graphs.
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+# You can define message sequence charts within doxygen comments using the \msc
+# command. Doxygen will then run the mscgen tool (see:
+# http://www.mcternan.me.uk/mscgen/)) to produce the chart and insert it in the
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+# the mscgen tool resides. If left empty the tool is assumed to be found in the
+# default search path.
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+MSCGEN_PATH            =
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+# You can include diagrams made with dia in doxygen documentation. Doxygen will
+# then run dia to produce the diagram and insert it in the documentation. The
+# DIA_PATH tag allows you to specify the directory where the dia binary resides.
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+DIA_PATH               =
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+# If set to YES the inheritance and collaboration graphs will hide inheritance
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+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
+# available from the path. This tool is part of Graphviz (see:
+# http://www.graphviz.org/), a graph visualization toolkit from AT&T and Lucent
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+# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
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+# When you want a differently looking font in the dot files that doxygen
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+# sure dot is able to find the font, which can be done by putting it in a
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+# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph for
+# each documented class showing the direct and indirect inheritance relations.
+# Setting this tag to YES will force the CLASS_DIAGRAMS tag to NO.
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+# This tag requires that the tag HAVE_DOT is set to YES.
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+# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
+# graph for each documented class showing the direct and indirect implementation
+# dependencies (inheritance, containment, and class references variables) of the
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+# This tag requires that the tag HAVE_DOT is set to YES.
+
+COLLABORATION_GRAPH    = YES
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+# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for
+# groups, showing the direct groups dependencies.
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+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GROUP_GRAPHS           = YES
+
+# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
+# collaboration diagrams in a style similar to the OMG's Unified Modeling
+# Language.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+UML_LOOK               = NO
+
+# If the UML_LOOK tag is enabled, the fields and methods are shown inside the
+# class node. If there are many fields or methods and many nodes the graph may
+# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the
+# number of items for each type to make the size more manageable. Set this to 0
+# for no limit. Note that the threshold may be exceeded by 50% before the limit
+# is enforced. So when you set the threshold to 10, up to 15 fields may appear,
+# but if the number exceeds 15, the total amount of fields shown is limited to
+# 10.
+# Minimum value: 0, maximum value: 100, default value: 10.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+UML_LIMIT_NUM_FIELDS   = 10
+
+# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and
+# collaboration graphs will show the relations between templates and their
+# instances.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are set to
+# YES then doxygen will generate a graph for each documented file showing the
+# direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INCLUDE_GRAPH          = YES
+
+# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are
+# set to YES then doxygen will generate a graph for each documented file showing
+# the direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INCLUDED_BY_GRAPH      = YES
+
+# If the CALL_GRAPH tag is set to YES then doxygen will generate a call
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable call graphs for selected
+# functions only using the \callgraph command.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+CALL_GRAPH             = NO
+
+# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable caller graphs for selected
+# functions only using the \callergraph command.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+CALLER_GRAPH           = NO
+
+# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
+# hierarchy of all classes instead of a textual one.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GRAPHICAL_HIERARCHY    = YES
+
+# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the
+# dependencies a directory has on other directories in a graphical way. The
+# dependency relations are determined by the #include relations between the
+# files in the directories.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DIRECTORY_GRAPH        = YES
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
+# generated by dot.
+# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in order
+# to make the SVG files visible in IE 9+ (other browsers do not have this
+# requirement).
+# Possible values are: png, png:cairo, png:cairo:cairo, png:cairo:gd, png:gd,
+# png:gd:gd, jpg, jpg:cairo, jpg:cairo:gd, jpg:gd, jpg:gd:gd, gif, gif:cairo,
+# gif:cairo:gd, gif:gd, gif:gd:gd and svg.
+# The default value is: png.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_IMAGE_FORMAT       = png
+
+# If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
+# enable generation of interactive SVG images that allow zooming and panning.
+#
+# Note that this requires a modern browser other than Internet Explorer. Tested
+# and working are Firefox, Chrome, Safari, and Opera.
+# Note: For IE 9+ you need to set HTML_FILE_EXTENSION to xhtml in order to make
+# the SVG files visible. Older versions of IE do not have SVG support.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INTERACTIVE_SVG        = NO
+
+# The DOT_PATH tag can be used to specify the path where the dot tool can be
+# found. If left blank, it is assumed the dot tool can be found in the path.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_PATH               =
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that
+# contain dot files that are included in the documentation (see the \dotfile
+# command).
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOTFILE_DIRS           =
+
+# The MSCFILE_DIRS tag can be used to specify one or more directories that
+# contain msc files that are included in the documentation (see the \mscfile
+# command).
+
+MSCFILE_DIRS           =
+
+# The DIAFILE_DIRS tag can be used to specify one or more directories that
+# contain dia files that are included in the documentation (see the \diafile
+# command).
+
+DIAFILE_DIRS           =
+
+# When using plantuml, the PLANTUML_JAR_PATH tag should be used to specify the
+# path where java can find the plantuml.jar file. If left blank, it is assumed
+# PlantUML is not used or called during a preprocessing step. Doxygen will
+# generate a warning when it encounters a \startuml command in this case and
+# will not generate output for the diagram.
+
+PLANTUML_JAR_PATH      =
+
+# When using plantuml, the specified paths are searched for files specified by
+# the !include statement in a plantuml block.
+
+PLANTUML_INCLUDE_PATH  =
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes
+# that will be shown in the graph. If the number of nodes in a graph becomes
+# larger than this value, doxygen will truncate the graph, which is visualized
+# by representing a node as a red box. Note that doxygen if the number of direct
+# children of the root node in a graph is already larger than
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note that
+# the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+# Minimum value: 0, maximum value: 10000, default value: 50.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_GRAPH_MAX_NODES    = 50
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the graphs
+# generated by dot. A depth value of 3 means that only nodes reachable from the
+# root by following a path via at most 3 edges will be shown. Nodes that lay
+# further from the root node will be omitted. Note that setting this option to 1
+# or 2 may greatly reduce the computation time needed for large code bases. Also
+# note that the size of a graph can be further restricted by
+# DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+# Minimum value: 0, maximum value: 1000, default value: 0.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
+# background. This is disabled by default, because dot on Windows does not seem
+# to support this out of the box.
+#
+# Warning: Depending on the platform used, enabling this option may lead to
+# badly anti-aliased labels on the edges of a graph (i.e. they become hard to
+# read).
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
+# files in one run (i.e. multiple -o and -T options on the command line). This
+# makes dot run faster, but since only newer versions of dot (>1.8.10) support
+# this, this feature is disabled by default.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend page
+# explaining the meaning of the various boxes and arrows in the dot generated
+# graphs.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES, doxygen will remove the intermediate dot
+# files that are used to generate the various graphs.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_CLEANUP            = YES
diff --git a/examples/alsa_timed_audio/init.h b/examples/alsa_timed_audio/init.h
new file mode 100644
index 00000000..3838dde1
--- /dev/null
+++ b/examples/alsa_timed_audio/init.h
@@ -0,0 +1,47 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef INIT_H
+#define INIT_H
+
+#define _isaudk_io_init __attribute__((constructor(101)))
+#define _isaudk_mixer_init __attribute__((constructor(102)))
+#define _isaudk_capture_init __attribute__((constructor(102)))
+#define _isaudk_stream_init __attribute__((constructor(103)))
+
+#define _isaudk_io_stop __attribute__((destructor(101)))
+#define _isaudk_mixer_stop __attribute__((destructor(102)))
+#define _isaudk_capture_stop __attribute__((destructor(102)))
+#define _isaudk_stream_stop __attribute__((destructor(103)))
+
+#endif/*INIT_H*/
diff --git a/examples/alsa_timed_audio/linked_list.c b/examples/alsa_timed_audio/linked_list.c
new file mode 100644
index 00000000..69f2be4e
--- /dev/null
+++ b/examples/alsa_timed_audio/linked_list.c
@@ -0,0 +1,132 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <linked_list.h>
+
+#include <stdlib.h>
+
+struct linked_list_element {
+	struct linked_list_element **addr;
+	struct linked_list_element *next;
+};
+
+struct linked_list {
+	struct linked_list_element *head;
+};
+
+struct linked_list *ll_init()
+{
+	return NULL;
+}
+
+struct linked_list *ll_alloc()
+{
+	struct linked_list *ret;
+	ret = (__typeof__(ret)) malloc((size_t) sizeof(*ret));
+	ret->head = NULL;
+	return ret;
+}
+
+bool ll_is_valid( struct linked_list *list )
+{
+	return list != NULL;
+}
+
+bool
+ll_add_head( struct linked_list *list, struct linked_list_element **element )
+{
+	if( *element == NULL )
+	{
+		*element = (__typeof__(*element))
+			malloc((size_t) sizeof(**element));
+		if( *element == NULL )
+			return false;
+	}
+
+	(*element)->next = list->head;
+	(*element)->addr = element;
+	list->head = *element;
+
+	return true;
+}
+
+struct linked_list_element *
+ll_get_head( struct linked_list *list )
+{
+	if( list != NULL )
+		return list->head;
+	return NULL;
+}
+
+void
+ll_remove_head( struct linked_list *list )
+{
+	list->head = list->head->next;
+}
+
+void
+ll_free_element( struct linked_list_element **element )
+{
+	free( *element );
+	*element = NULL;
+}
+
+void
+ll_init_element( struct linked_list_element **element )
+{
+	*element = NULL;
+}
+
+struct linked_list_element **
+ll_get_addr( struct linked_list_element *element )
+{
+	return element->addr;
+}
+
+void
+ll_clean( struct linked_list **list )
+{
+	struct linked_list *iter = *list;
+	struct linked_list_element *tmp;
+
+	if( !ll_is_valid( iter ))
+		return;
+
+	while(( tmp = ll_get_head( iter )) != NULL )
+	{
+		ll_remove_head( iter );
+		ll_free_element( ll_get_addr( tmp ));
+	}
+
+	free( iter );
+}
diff --git a/examples/alsa_timed_audio/linked_list.h b/examples/alsa_timed_audio/linked_list.h
new file mode 100644
index 00000000..66ef483b
--- /dev/null
+++ b/examples/alsa_timed_audio/linked_list.h
@@ -0,0 +1,68 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef LINKED_LIST_H
+#define LINKED_LIST_H
+
+#include <bool.h>
+
+typedef struct linked_list*		linked_list_t;
+typedef struct linked_list_element*	linked_list_element_t;
+
+linked_list_t ll_init();
+linked_list_t ll_alloc();
+
+bool ll_is_valid( linked_list_t list );
+
+void
+ll_init_element( linked_list_element_t *element );
+
+bool
+ll_add_head( linked_list_t list, linked_list_element_t *element );
+
+linked_list_element_t
+ll_get_head( linked_list_t list );
+
+linked_list_element_t *
+ll_get_addr( linked_list_element_t element );
+
+void
+ll_remove_head( linked_list_t list );
+
+void
+ll_free_element( linked_list_element_t *element );
+
+void
+ll_clean( linked_list_t *list );
+
+#endif/*LINKED_LIST_H*/
diff --git a/examples/alsa_timed_audio/mixer.c b/examples/alsa_timed_audio/mixer.c
new file mode 100644
index 00000000..76eb6f26
--- /dev/null
+++ b/examples/alsa_timed_audio/mixer.c
@@ -0,0 +1,735 @@
+
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+******************************************************************************/
+
+#include <sdk.h>
+
+#include <linked_list.h>
+#include <audio_output.h>
+#include <util.h>
+#include <stream.h>
+#include <init.h>
+#include <string.h>
+#include <alsa.h>
+#include <math.h>
+#include <thread_signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <stdint.h>
+#include <pthread.h>
+#include <limits.h>
+//maximum allowed PER_STREAM_BUFFER_COUNT is 100
+#define PER_STREAM_BUFFER_COUNT 3
+
+#define NSEC_PER_SEC 			( 1000000000ULL )
+#define START_THRESHOLD			( 30000000 ) /*ns*/
+
+// We'll get a "pretty good" estimation of the start time at 50 ms
+#define CROSSTSTAMP_THRESHOLD_INIT	( 1000 ) /*ns*/
+#define CROSSTSTAMP_THRESHOLD_STOP	( 50000000 ) /*ns*/
+
+struct isaudk_mixer_handle {
+	uint8_t master_output_volume;
+	struct isaudk_output *output;
+	struct isaudk_format format;
+	isaudk_sample_rate_t rate;
+
+	bool start_req;
+	bool exit_req;
+	bool running;
+	bool playing;
+	isaudk_mode_t mode;
+
+	pthread_t thread;
+
+	pthread_mutex_t mixer_state_lock;
+	pthread_mutex_t mixer_control_lock;
+	isaudk_signal_t wake_signal;
+
+	bool fatal;
+	isaudk_error_t thread_exit_code;
+	bool fatal_loop; // Failsafe indicator
+
+	struct isaudk_system_time	start_time;
+	struct isaudk_system_time	requested_start_time;
+	struct isaudk_system_time	audio_start_time;
+	struct isaudk_cross_time	curr_cross_time;
+	struct isaudk_cross_time	initial_cross_time;
+	struct isaudk_cross_time	audio_initial_cross_time;
+	uint64_t samples_written;
+
+	linked_list_t stream_list;
+};
+
+struct per_stream_sample_buffer
+{
+	isaudk_sample_block_t buffer[PER_STREAM_BUFFER_COUNT];
+	uint16_t count[PER_STREAM_BUFFER_COUNT];
+
+	// incremented by the mixer loop each time buffer is read
+	uint8_t read_seq[PER_STREAM_BUFFER_COUNT];
+	// incremented each time buffer is written
+	uint8_t write_seq[PER_STREAM_BUFFER_COUNT];
+
+	uint8_t idx;
+	uint8_t eos;
+	bool flag;
+	int remainder;
+	isaudk_signal_t signal;
+};
+
+void mixer_init( void ) _isaudk_mixer_init;
+void mixer_stop( void ) _isaudk_mixer_stop;
+
+static struct isaudk_mixer_handle _default_mixer;
+static struct isaudk_mixer_handle *default_mixer;
+
+bool _mixer_init( struct isaudk_mixer_handle *mixer )
+{
+	if( pthread_mutex_init( &mixer->mixer_control_lock, NULL ) != 0 )
+		return false;
+
+	if( pthread_mutex_init( &mixer->mixer_state_lock, NULL ) != 0 )
+		return false;
+
+	mixer->master_output_volume = 0xFF;
+	mixer->fatal = false;
+	mixer->running = false;
+	mixer->start_req = false;
+	mixer->stream_list = ll_alloc();
+	mixer->mode = ISAUDK_SILENCE;
+
+	if( isaudk_create_signal( &mixer->wake_signal ) != ISAUDK_SIGNAL_OK )
+	{
+		return ISAUDK_NOMEMORY;
+	}
+
+	return true;
+}
+
+void mixer_init( void )
+{
+	// Default ALSA settings must match these defaults
+	_default_mixer.output = isaudk_get_default_alsa_output();
+
+	if( _default_mixer.output == NULL )
+		return;
+
+	// Setup the default mixer here
+	if( !_mixer_init( &_default_mixer ))
+		return;
+
+	_default_mixer.format.encoding = ISAUDK_ENC_PS16;
+	_default_mixer.format.channels = 2;
+	_default_mixer.rate = _48K_SAMPLE_RATE;
+	if( !_default_mixer.output->fn->set_audio_param
+	    ( _default_mixer.output->ctx, &_default_mixer.format,
+	      _48K_SAMPLE_RATE ))
+		return;
+
+	default_mixer = &_default_mixer;
+}
+
+struct isaudk_mixer_handle *isaudk_get_default_mixer()
+{
+	return default_mixer;
+}
+
+isaudk_error_t
+isaudk_mixer_register_stream( struct isaudk_mixer_handle *mixer,
+			      isaudk_stream_handle_t stream,
+			      struct isaudk_format *format,
+			      isaudk_sample_rate_t rate )
+{
+	isaudk_error_t ret = ISAUDK_SUCCESS;
+	struct per_stream_sample_buffer *sample_buffer;
+	int i;
+
+	// Check that the format matches
+	if( format != NULL &&
+	    !isaudk_is_format_equal( format, &mixer->format ))
+		return ISAUDK_BADFORMAT;
+
+	// Check that the format matches
+	if( rate != DEFAULT_SAMPLE_RATE && mixer->rate != rate )
+		return ISAUDK_BADFORMAT;
+
+	// Allocate a buffer for the stream and add this to the provate
+	sample_buffer = (__typeof__(sample_buffer))
+		malloc((size_t) sizeof( struct per_stream_sample_buffer ));
+	if( sample_buffer == NULL )
+		return ISAUDK_NOMEMORY;
+	sample_buffer->idx = 0;
+	sample_buffer->flag = false;
+	sample_buffer->remainder = PS16_SAMPLE_COUNT/mixer->format.channels;
+	if( isaudk_create_signal( &sample_buffer->signal )
+	    != ISAUDK_SIGNAL_OK )
+	{
+		return ISAUDK_NOMEMORY;
+	}
+	for( i = 0; i < PER_STREAM_BUFFER_COUNT; ++i )
+	{
+		sample_buffer->read_seq[i] = 1;
+		sample_buffer->write_seq[i] = 0;
+	}
+	sample_buffer->eos = UCHAR_MAX;
+
+	isaudk_stream_set_mixer_private( stream, sample_buffer );
+
+	if( pthread_mutex_lock( &mixer->mixer_state_lock ) != 0 )
+		return ISAUDK_PTHREAD;
+
+	if( !ll_add_head( mixer->stream_list,
+			  isaudk_get_stream_mixer_reference( stream )))
+	{
+		ret = ISAUDK_NOMEMORY;
+		goto unlock;
+	}
+
+
+unlock:
+	if( pthread_mutex_unlock( &mixer->mixer_state_lock ) != 0 )
+		return ISAUDK_PTHREAD;
+
+	return ret;
+}
+
+static unsigned get_buffer_sample_count( struct isaudk_mixer_handle *mixer )
+{
+	switch( mixer->format.encoding )
+	{
+	default:
+		// Unsupported format request
+		return 0;
+	case ISAUDK_ENC_PS16:
+		return PS16_SAMPLE_COUNT;
+	}
+
+	return 0;
+}
+
+static unsigned get_start_threshold( struct isaudk_mixer_handle *mixer )
+{
+	return START_THRESHOLD /
+		( NSEC_PER_SEC / ( mixer->rate * ISAUDK_RATE_MULTIPLIER ));
+}
+
+isaudk_error_t
+isaudk_mixer_set_buffer_sample_count( isaudk_stream_handle_t stream,
+				      struct isaudk_mixer_handle *mixer,
+				      size_t idx, size_t count, bool eos )
+{
+	struct per_stream_sample_buffer *buffer;
+	isaudk_error_t thread_exit_code;
+
+	buffer = (__typeof__(buffer))
+		isaudk_stream_get_mixer_private( stream );
+
+	if( mixer->fatal )
+		return ISAUDK_FATAL;
+
+	// Check the arguments
+	if( idx > PER_STREAM_BUFFER_COUNT - 1 )
+		return ISAUDK_INVALIDARG;
+
+	if( count > get_buffer_sample_count( mixer ))
+		return ISAUDK_INVALIDARG;
+
+	// This would cause us to over-write a buffer that hasn't rendered
+	if( UINT8_ADD( buffer->write_seq[idx], 1 ) != buffer->read_seq[idx] )
+	{
+		return ISAUDK_AGAIN;
+	}
+
+	pthread_mutex_lock( &mixer->mixer_state_lock );
+	thread_exit_code = mixer->thread_exit_code;
+	pthread_mutex_unlock( &mixer->mixer_state_lock );
+	if( thread_exit_code != ISAUDK_SUCCESS )
+		return thread_exit_code;
+
+	buffer->count[idx] = count;
+	if( eos )
+		buffer->eos = idx;
+
+	++buffer->write_seq[idx];
+	isaudk_signal_send( mixer->wake_signal );
+
+	return ISAUDK_SUCCESS;
+}
+
+struct mixer_loop_arg
+{
+	struct isaudk_mixer_handle *mixer;
+	isaudk_signal_t signal;
+};
+
+// Inside loop reports fatal error
+#define CHECKED_PTHREAD_CALL_FATAL(pthread_call,mixer)	\
+	{						\
+		int err;				\
+		err = pthread_call;			\
+		if( err != 0 ) {			\
+			(mixer)->fatal_loop = true;	\
+			return NULL;			\
+		}					\
+	}
+
+#define MIXER_LOOP_LOCK_MIXER				\
+	CHECKED_PTHREAD_CALL_FATAL			\
+	( pthread_mutex_lock( &mixer->mixer_state_lock ), mixer )
+
+#define MIXER_LOOP_UNLOCK_MIXER				\
+	CHECKED_PTHREAD_CALL_FATAL			\
+	( pthread_mutex_unlock( &mixer->mixer_state_lock ), mixer )
+
+void *mixer_loop( void *_arg )
+{
+	struct mixer_loop_arg *arg = (struct mixer_loop_arg *) _arg;
+	struct isaudk_mixer_handle *mixer = arg->mixer;
+	isaudk_signal_error_t sigerr;
+	struct per_stream_sample_buffer *stream_buffer;
+	unsigned cross_timestamp_thresh = CROSSTSTAMP_THRESHOLD_INIT;
+	int64_t buffer_cycles_done = 0;
+	int64_t remainder_sample_count, wait_buffer_count = -10, wait_time;
+	int64_t wait_samples, samples_played = 0;
+	double small_remainder;
+
+	void *buffer;
+	void *buffer_from;
+	void *next_buffer;
+	void *audio_buffer;
+	isaudk_stream_handle_t stream;
+
+	mixer->running = true;
+	mixer->initial_cross_time = INVALID_CROSS_TIME;
+	mixer->curr_cross_time = INVALID_CROSS_TIME;
+	mixer->samples_written = 0;
+	mixer->playing = false;
+	mixer->thread_exit_code = ISAUDK_SUCCESS;
+	mixer->start_time.time = ULLONG_MAX;
+	mixer->mode = ISAUDK_SILENCE;
+
+
+	mixer->audio_initial_cross_time.sys.time = 0;
+	mixer->audio_initial_cross_time.dev.time = 0;
+
+	struct isaudk_cross_time init_cross_time;
+	mixer->output->fn->get_cross_tstamp
+		( mixer->output->ctx, &init_cross_time );
+
+	// Signal the calling thread
+	sigerr = isaudk_signal_send( arg->signal );
+	if( sigerr != ISAUDK_SIGNAL_OK ) {
+		MIXER_LOOP_LOCK_MIXER;
+		mixer->running = false;
+		mixer->thread_exit_code = ISAUDK_PTHREAD;
+		MIXER_LOOP_UNLOCK_MIXER;
+
+		return NULL;
+	}
+
+	while( !mixer->exit_req )
+	{
+		unsigned samples_to_write;
+		bool write_result;
+		struct isaudk_cross_time curr_cross_time;
+		int16_t SILENCE[PS16_SAMPLE_COUNT] = {0};
+		int16_t offset;
+		int buffer_idx;
+
+		MIXER_LOOP_LOCK_MIXER;
+		stream = isaudk_mixer_reference_to_stream
+			( ll_get_addr( ll_get_head( mixer->stream_list )) );
+		MIXER_LOOP_UNLOCK_MIXER;
+
+		stream_buffer = isaudk_stream_get_mixer_private( stream );
+		stream_buffer->remainder = 0;
+		buffer = get_buffer_pointer
+			( &mixer->format,
+			  stream_buffer->buffer + stream_buffer->idx );
+
+		// Play buffer
+		while( stream_buffer->read_seq[stream_buffer->idx] !=
+		       stream_buffer->write_seq[stream_buffer->idx] )
+		{
+			isaudk_signal_wait( mixer->wake_signal, 0 );
+		}
+
+		samples_to_write = stream_buffer->count[stream_buffer->idx];
+		if  (mixer->mode == ISAUDK_AUDIO) {
+			buffer_idx = stream_buffer->idx;
+			audio_buffer = get_buffer_pointer( &mixer->format, stream_buffer->buffer + buffer_idx );
+			if ( buffer_idx == (PER_STREAM_BUFFER_COUNT - 1) ) {
+				next_buffer = get_buffer_pointer( &mixer->format, stream_buffer->buffer );
+			}
+			else {
+				next_buffer = get_buffer_pointer( &mixer->format, stream_buffer->buffer + buffer_idx + 1 );
+			}
+			memcpy( (void *)( SILENCE ), (const void *)( &((int16_t *)(audio_buffer))[PS16_SAMPLE_COUNT - offset] ), offset*sizeof(int16_t) );
+			memcpy( (void *)( &(SILENCE[offset]) ), (const void *)(next_buffer), (PS16_SAMPLE_COUNT - offset)*sizeof(int16_t) );
+			write_result = mixer->output->fn->queue_output_buffer( mixer->output->ctx, SILENCE, &samples_to_write );
+		}
+		else {
+			write_result = mixer->output->fn->queue_output_buffer( mixer->output->ctx, SILENCE, &samples_to_write );
+		}
+
+		buffer_cycles_done++;
+		samples_played += samples_to_write;
+
+		if( !write_result )
+		{
+			MIXER_LOOP_LOCK_MIXER;
+			mixer->thread_exit_code = ISAUDK_FATAL;
+			MIXER_LOOP_UNLOCK_MIXER;
+			break;
+		}
+
+		mixer->samples_written += samples_to_write;
+		if  (mixer->mode == ISAUDK_AUDIO ) {
+			++stream_buffer->read_seq[stream_buffer->idx];
+		}
+
+		if( !mixer->playing )
+		{
+			if( mixer->samples_written >
+			    get_start_threshold( mixer ))
+			{
+				mixer->output->fn->start( mixer->output->ctx );
+
+				MIXER_LOOP_LOCK_MIXER;
+				mixer->output->fn->get_cross_tstamp
+					( mixer->output->ctx,
+					  &mixer->initial_cross_time );
+				MIXER_LOOP_UNLOCK_MIXER;
+
+				mixer->playing = true;
+			}
+		}
+
+		if( mixer->playing )
+		{
+			mixer->output->fn->get_cross_tstamp
+				( mixer->output->ctx, &curr_cross_time );
+		}
+
+		if( mixer->playing &&
+		    ((mixer->curr_cross_time.dev.time <= cross_timestamp_thresh
+		      && curr_cross_time.dev.time > cross_timestamp_thresh) ||
+		     stream_buffer->eos == stream_buffer->idx ) )
+		{
+			double ratio;
+			unsigned delta;
+
+			ratio  = curr_cross_time.sys.time;
+			ratio -= mixer->initial_cross_time.sys.time;
+			ratio /= curr_cross_time.dev.time -
+				mixer->initial_cross_time.dev.time;
+
+			delta = mixer->initial_cross_time.dev.time * ratio;
+
+			mixer->start_time = mixer->initial_cross_time.sys;
+
+			mixer->start_time.time -= delta;
+
+			cross_timestamp_thresh = curr_cross_time.dev.time * 2;
+
+			if (( mixer->mode == ISAUDK_SILENCE )&&(cross_timestamp_thresh > CROSSTSTAMP_THRESHOLD_STOP )) {
+				wait_time = mixer->requested_start_time.time - mixer->start_time.time;
+					if (wait_time < 0) {
+						mixer->start_time.time = 0xffffff;
+					stream_buffer->idx = ISAUDK_INVALIDTIME;
+					isaudk_signal_send( stream_buffer->signal );
+					return NULL;
+				}
+				wait_samples = (int64_t)(((double)wait_time/1000000.0)*48.0);
+				small_remainder = (((double)wait_time/1000000.0)*48.0 - wait_samples)*(1000000.0/48.0);
+				wait_samples -= samples_played;
+				wait_buffer_count = wait_samples/(PS16_SAMPLE_COUNT/2);
+				remainder_sample_count = wait_samples%(PS16_SAMPLE_COUNT/2);
+				buffer_cycles_done = 0;
+
+				samples_to_write = PS16_SAMPLE_COUNT/2;
+				offset = 2*remainder_sample_count;
+				for (int i = 0; i < wait_buffer_count; i++) {
+					write_result = mixer->output->fn->queue_output_buffer
+						( mixer->output->ctx, SILENCE, &samples_to_write );
+				}
+
+
+				for (int i = 0; i < offset; i++) {
+					SILENCE[i] = 0;
+				}
+				buffer_from = get_buffer_pointer( &mixer->format,stream_buffer->buffer );
+				memcpy( (void *)( &(SILENCE[offset]) ), (const void *)buffer_from, (PS16_SAMPLE_COUNT - offset)*sizeof(int16_t) );
+
+				write_result = mixer->output->fn->queue_output_buffer
+					( mixer->output->ctx, SILENCE, &samples_to_write );
+
+				mixer->audio_start_time.time =mixer->start_time.time + wait_time - small_remainder;
+				stream_buffer->idx = 0;
+				++stream_buffer->read_seq[stream_buffer->idx];
+				stream_buffer->remainder = remainder_sample_count;
+				mixer->start_time.time = mixer->requested_start_time.time;
+				mixer->mode = ISAUDK_AUDIO;
+			}
+
+
+			// After stop threshold is reached stop
+			if( cross_timestamp_thresh >
+			    CROSSTSTAMP_THRESHOLD_STOP )
+				cross_timestamp_thresh = 0;
+
+		}
+
+		if( mixer->playing )
+		{
+			MIXER_LOOP_LOCK_MIXER;
+			mixer->curr_cross_time = curr_cross_time;
+			// Signal for more data
+			MIXER_LOOP_UNLOCK_MIXER;
+		}
+		if ( mixer->mode == ISAUDK_AUDIO ) {
+			isaudk_signal_send( stream_buffer->signal );
+			if( stream_buffer->eos == stream_buffer->idx )
+			{
+				mixer->output->fn->stop( mixer->output->ctx );
+				break;
+			}
+			stream_buffer->idx = ( stream_buffer->idx + 1 ) %PER_STREAM_BUFFER_COUNT;
+		}
+
+	}
+
+	// Exit normally
+	mixer->running = false;
+
+	// Send a signal at the end, if we exit abnormally the client may
+	// be "hung" waiting for a signal
+	isaudk_signal_send( stream_buffer->signal );
+
+	return NULL;
+}
+
+#define COND_RETURN_UNLOCK(cond,stmt,retval)	\
+	if(( cond ))				\
+	{					\
+		stmt;				\
+		ret = (retval);			\
+		goto unlock;			\
+	}
+
+
+
+isaudk_error_t
+isaudk_start_mixer( struct isaudk_mixer_handle *mixer, struct isaudk_system_time start_time )
+{
+	struct mixer_loop_arg arg;
+	isaudk_error_t ret = ISAUDK_SUCCESS;
+
+	if( pthread_mutex_lock( &mixer->mixer_control_lock ) != 0 )
+		return ISAUDK_PTHREAD;
+
+	if( mixer->start_req )
+	{
+		COND_RETURN_UNLOCK( mixer->running,, ISAUDK_SUCCESS )
+		else
+			COND_RETURN_UNLOCK( mixer->fatal || mixer->fatal_loop,,
+					    ISAUDK_FATAL )
+			else
+				COND_RETURN_UNLOCK( true,,
+						    mixer->thread_exit_code );
+	}
+
+	COND_RETURN_UNLOCK
+		( isaudk_create_signal( &arg.signal ) != ISAUDK_SIGNAL_OK,
+		  mixer->fatal = true, ISAUDK_PTHREAD );
+
+	arg.mixer = mixer;
+	mixer->exit_req = false;
+	mixer->requested_start_time = start_time;
+
+	COND_RETURN_UNLOCK
+		( pthread_create( &mixer->thread, NULL, mixer_loop, &arg ) !=
+		  0, mixer->fatal = true, ISAUDK_PTHREAD );
+
+	COND_RETURN_UNLOCK
+		( isaudk_signal_wait( arg.signal, 0 ) != ISAUDK_SIGNAL_OK,
+		  {
+			  pthread_cancel( mixer->thread );
+			  mixer->fatal = true; }, ISAUDK_PTHREAD )
+
+	mixer->start_req = true;
+
+unlock:
+	pthread_mutex_unlock( &mixer->mixer_control_lock );
+
+	return ret;
+}
+
+isaudk_error_t
+isaudk_drain_mixer( struct isaudk_mixer_handle *mixer )
+{
+	if( mixer == NULL )
+		return ISAUDK_INVALIDARG;
+
+	pthread_join( mixer->thread, NULL );
+
+	return ISAUDK_SUCCESS;
+}
+
+void mixer_stop( void )
+{
+	isaudk_drain_mixer( default_mixer );
+}
+
+void isaudk_mixer_get_stream_buffer( isaudk_stream_handle_t stream,
+				     isaudk_sample_block_t **sample_buffer,
+				     unsigned *count,
+				     isaudk_signal_t *signal )
+{
+	struct per_stream_sample_buffer *buffer;
+
+	buffer = isaudk_stream_get_mixer_private( stream );
+	*sample_buffer = buffer->buffer;
+	*count = PER_STREAM_BUFFER_COUNT;
+	*signal = buffer->signal;
+}
+
+uint8_t
+isaudk_mixer_get_current_index( isaudk_stream_handle_t stream, bool *roll )
+{
+	struct per_stream_sample_buffer *buffer;
+	uint8_t retval;
+
+	buffer = isaudk_stream_get_mixer_private( stream );
+	retval = buffer->idx;
+
+	if( buffer->write_seq[retval] != buffer->read_seq[retval] )
+		*roll = true;
+	else
+		*roll = false;
+
+	return buffer->idx;
+}
+
+bool
+isaudk_mixer_get_flag( isaudk_stream_handle_t stream )
+{
+	struct per_stream_sample_buffer *buffer;
+	bool retval;
+
+	buffer = isaudk_stream_get_mixer_private( stream );
+	retval = buffer->flag;
+	return retval;
+}
+
+void
+isaudk_mixer_clear_flag( isaudk_stream_handle_t stream )
+{
+
+	struct per_stream_sample_buffer *buffer;
+	buffer = isaudk_stream_get_mixer_private( stream );
+	buffer->flag = false;
+}
+
+int
+isaudk_mixer_get_remainder( isaudk_stream_handle_t stream )
+{
+	struct per_stream_sample_buffer *buffer;
+	int retval;
+
+	buffer = isaudk_stream_get_mixer_private( stream );
+	retval = buffer->remainder;
+	return retval;
+}
+
+isaudk_error_t
+isaudk_mixer_get_start_time( isaudk_mixer_handle_t mixer,
+			     struct isaudk_system_time *start_time )
+{
+	struct isaudk_system_time start_time_tmp;
+	isaudk_error_t error;
+
+	pthread_mutex_lock( &mixer->mixer_state_lock );
+	start_time_tmp = mixer->start_time;
+	error = mixer->thread_exit_code;
+	pthread_mutex_unlock( &mixer->mixer_state_lock );
+
+	if( error != ISAUDK_SUCCESS )
+		return error;
+
+	if( start_time_tmp.time != ULLONG_MAX )
+	{
+		*start_time = start_time_tmp;
+		return ISAUDK_SUCCESS;
+	}
+
+	return ISAUDK_AGAIN;
+}
+
+isaudk_error_t
+isaudk_mixer_get_audio_start_time( isaudk_mixer_handle_t mixer,
+			     struct isaudk_system_time *audio_start_time )
+{
+	struct isaudk_system_time audio_start_time_tmp;
+	isaudk_error_t error;
+
+	pthread_mutex_lock( &mixer->mixer_state_lock );
+	audio_start_time_tmp = mixer->audio_start_time;
+	error = mixer->thread_exit_code;
+	pthread_mutex_unlock( &mixer->mixer_state_lock );
+
+	if( error != ISAUDK_SUCCESS )
+		return error;
+
+	if( audio_start_time_tmp.time != ULLONG_MAX )
+	{
+		*audio_start_time = audio_start_time_tmp;
+		return ISAUDK_SUCCESS;
+	}
+
+	return ISAUDK_AGAIN;
+}
+
+isaudk_error_t
+isaudk_mixer_get_stream_info( struct isaudk_mixer_handle *handle,
+			      struct isaudk_format *format,
+			      isaudk_sample_rate_t *rate )
+{
+	if( format != NULL )
+		*format = handle->format;
+	if( rate != NULL )
+		*rate = handle->rate;
+
+	return ISAUDK_SUCCESS;
+}
diff --git a/examples/alsa_timed_audio/mixer.h b/examples/alsa_timed_audio/mixer.h
new file mode 100644
index 00000000..43e21af7
--- /dev/null
+++ b/examples/alsa_timed_audio/mixer.h
@@ -0,0 +1,84 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef MIXER_H
+#define MIXER_H
+
+#include <sdk.h>
+
+isaudk_mixer_handle_t isaudk_get_default_mixer();
+
+isaudk_error_t
+isaudk_start_mixer( isaudk_mixer_handle_t mixer, struct isaudk_system_time start_time );
+
+void isaudk_mixer_get_stream_buffer( isaudk_stream_handle_t stream,
+				     isaudk_sample_block_t **sample_buffer,
+				     unsigned *count,
+				     isaudk_signal_t *signal );
+
+uint8_t
+isaudk_mixer_get_current_index( isaudk_stream_handle_t stream, bool *roll );
+
+bool
+isaudk_mixer_get_flag( isaudk_stream_handle_t stream );
+
+void
+isaudk_mixer_clear_flag( isaudk_stream_handle_t stream );
+
+int
+isaudk_mixer_get_remainder( isaudk_stream_handle_t stream );
+
+isaudk_error_t
+isaudk_mixer_set_buffer_sample_count( isaudk_stream_handle_t stream,
+				      isaudk_mixer_handle_t mixer,
+				      size_t idx, size_t count, bool eos );
+
+isaudk_error_t
+isaudk_mixer_get_start_time( isaudk_mixer_handle_t mixer,
+			     struct isaudk_system_time *start_time );
+isaudk_error_t
+isaudk_mixer_get_audio_start_time( isaudk_mixer_handle_t mixer,
+			     struct isaudk_system_time *start_time );
+
+isaudk_error_t
+isaudk_mixer_register_stream( struct isaudk_mixer_handle *mixer,
+			      isaudk_stream_handle_t stream,
+			      struct isaudk_format *format,
+			      isaudk_sample_rate_t rate );
+
+isaudk_error_t
+isaudk_mixer_get_stream_info( isaudk_mixer_handle_t handle,
+			      struct isaudk_format *format,
+			      isaudk_sample_rate_t *rate );
+
+#endif/*MIXER_H*/
diff --git a/examples/alsa_timed_audio/monoraw_to_net_time.c b/examples/alsa_timed_audio/monoraw_to_net_time.c
new file mode 100644
index 00000000..2aeda04e
--- /dev/null
+++ b/examples/alsa_timed_audio/monoraw_to_net_time.c
@@ -0,0 +1,80 @@
+//! \file 	monoraw_to_net_time.c
+//! \author	Christopher Hall
+//! \copyright	(C) 2016 Intel Corporation, All Rights Reserved
+//!		\<\<INTEL CONFIDENTIAL\>\>
+
+//! \page sys_to_net_time Monotonic raw to network time
+//!
+//! This application connects to the timesync daemon and converts system time
+//! in terms of monotonic raw to network (802.1AS) time. The command line is:
+//! <br><br><tt>
+//! monoraw_to_net_time -syst=\<system time\> -if=\<shared memory segment\>
+//! </tt><br><br>
+//!
+//! Prints the network time to standard out
+
+#include <args.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <ipcdef.hpp>
+
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <pthread.h>
+
+int main( int argc, char **argv )
+{
+	uint64_t system_time;
+	char *input_file;
+	int stop_idx;
+	isaudk_parse_error_t parse_error;
+
+	uint64_t system_update_time, master_time_adj;
+	int64_t system_delta, master_delta;
+
+	struct __attribute__ ((__packed__)) {
+		pthread_mutex_t lock;
+		gPtpTimeData data;
+	} *shm_data;
+
+	int shm_fd;
+
+        struct isaudk_arg args[] =
+        {
+                ISAUDK_DECLARE_REQUIRED_ARG(SYSTIME,&system_time),
+                ISAUDK_DECLARE_REQUIRED_ARG(INPUT_FILE,&input_file),
+        };
+
+        stop_idx = isaudk_parse_args( args, sizeof(args)/sizeof(args[0]),
+                                      argc-1, argv+1, &parse_error );
+        if( parse_error != ISAUDK_PARSE_SUCCESS )
+        {
+                printf( "Error parsing arguments\n" );
+                return -1;
+        }
+
+	shm_fd = shm_open( input_file, O_RDWR, 0 );
+	if( shm_fd == -1 )
+	{
+		printf( "Failed to open shared memory segment: %s(%s)\n",
+			input_file, strerror( errno ));
+	}
+
+	shm_data = mmap( NULL, sizeof( *shm_data ), PROT_READ | PROT_WRITE,
+			 MAP_SHARED, shm_fd, 0 );
+
+	pthread_mutex_lock( &shm_data->lock );
+	system_update_time = shm_data->data.local_time +
+		shm_data->data.ls_phoffset;
+	system_delta = system_time - system_update_time;
+	master_delta = system_delta * shm_data->data.ls_freqoffset *
+		shm_data->data.ml_freqoffset;
+	master_time_adj = master_delta +
+		shm_data->data.local_time - shm_data->data.ml_phoffset;
+	pthread_mutex_unlock( &shm_data->lock );
+
+	printf( "%lu\n", master_time_adj );
+
+	return 0;
+}
diff --git a/examples/alsa_timed_audio/net_time_to_monoraw.c b/examples/alsa_timed_audio/net_time_to_monoraw.c
new file mode 100644
index 00000000..07226a38
--- /dev/null
+++ b/examples/alsa_timed_audio/net_time_to_monoraw.c
@@ -0,0 +1,80 @@
+//! \file 	net_time_to_monoraw.c
+//! \author	Christopher Hall
+//! \copyright	(C) 2016 Intel Corporation, All Rights Reserved
+//!		\<\<INTEL CONFIDENTIAL\>\>
+
+//! \page net_to_sys_time Network time to monotonic raw
+//!
+//! This application connects to the timesync daemon and converts network time
+//! (802.1AS) to system time in terms of monotonic raw. The command line is:
+//! <br><br><tt>
+//! net_time_to_monoraw -netwkt=\<network time\> -if=\<shared memory segment\>
+//! </tt><br><br>
+//!
+//! Prints the system time to standard out
+
+#include <args.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <ipcdef.hpp>
+
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <pthread.h>
+
+int main( int argc, char **argv )
+{
+	uint64_t net_time;
+	char *input_file;
+	int stop_idx;
+	isaudk_parse_error_t parse_error;
+
+	uint64_t master_update_time, system_time_adj;
+	int64_t system_delta, master_delta;
+
+	struct __attribute__ ((__packed__)) {
+		pthread_mutex_t lock;
+		gPtpTimeData data;
+	} *shm_data;
+
+	int shm_fd;
+
+        struct isaudk_arg args[] =
+        {
+                ISAUDK_DECLARE_REQUIRED_ARG(NETTIME,&net_time),
+                ISAUDK_DECLARE_REQUIRED_ARG(INPUT_FILE,&input_file),
+        };
+
+        stop_idx = isaudk_parse_args( args, sizeof(args)/sizeof(args[0]),
+                                      argc-1, argv+1, &parse_error );
+        if( parse_error != ISAUDK_PARSE_SUCCESS )
+        {
+                printf( "Error parsing arguments\n" );
+                return -1;
+        }
+
+	shm_fd = shm_open( input_file, O_RDWR, 0 );
+	if( shm_fd == -1 )
+	{
+		printf( "Failed to open shared memory segment: %s(%s)\n",
+			input_file, strerror( errno ));
+	}
+
+	shm_data = mmap( NULL, sizeof( *shm_data ), PROT_READ | PROT_WRITE,
+			 MAP_SHARED, shm_fd, 0 );
+
+	pthread_mutex_lock( &shm_data->lock );
+	master_update_time = shm_data->data.local_time -
+		shm_data->data.ml_phoffset;
+	master_delta = net_time - master_update_time;
+	system_delta = master_delta /
+		(shm_data->data.ls_freqoffset * shm_data->data.ml_freqoffset);
+	system_time_adj = system_delta +
+		shm_data->data.local_time + shm_data->data.ls_phoffset;
+	pthread_mutex_unlock( &shm_data->lock );
+
+	printf( "%lu\n", system_time_adj );
+
+	return 0;
+}
diff --git a/examples/alsa_timed_audio/play_file_at.c b/examples/alsa_timed_audio/play_file_at.c
new file mode 100644
index 00000000..4e723a00
--- /dev/null
+++ b/examples/alsa_timed_audio/play_file_at.c
@@ -0,0 +1,214 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+//! \page play_at Play file at time
+//! This application plays a file at the specified time. The command line is:
+//! <br><br><tt>
+//! play_file_at -st=\<start time\> -if=\<input file\>
+//! </tt><br><br>
+//! A start time of zero means start now
+//!
+
+#include <sdk.h>
+#include <args.h>
+#include <time.h>
+#include <math.h>
+
+#include <sndfile.h>
+#include <stdio.h>
+#include <string.h>
+
+// Attempt to read a buffers worth of samples, detecting eof (end-of-stream)
+// Returns the end-of-stream value, indicating that the stream is finished
+static isaudk_error_t
+readf_short_eos_detect
+( SNDFILE *sndfile, isaudk_stream_handle_t stream, uint8_t channels,
+  isaudk_sample_block_t *buffer, uint8_t idx, bool *eos)
+{
+	sf_count_t samples_read;
+
+	samples_read = PS16_SAMPLE_COUNT/channels;
+	samples_read = sf_readf_short
+			( sndfile, buffer[idx].PS16, samples_read );
+
+	if( samples_read < (PS16_SAMPLE_COUNT / channels)  ) {
+		*eos = true;
+	}
+	else {
+		*eos = false;
+	}
+
+	return isaudk_stream_set_buffer_sample_count
+		( stream, idx, samples_read, *eos );
+}
+
+static isaudk_error_t
+readf_short_multi_eos_detect
+( SNDFILE *sndfile, isaudk_stream_handle_t stream, uint8_t channels,
+  isaudk_sample_block_t *buffer, size_t *start, size_t end, size_t count,
+  bool *eos, bool roll )
+{
+	size_t buffer_index;
+	isaudk_error_t err;
+
+	if( end < *start || ( end == *start && roll )) end += count;
+
+	for( buffer_index = *start; buffer_index < end; ++buffer_index )
+	{
+		err = readf_short_eos_detect
+			( sndfile, stream, channels, buffer,
+			  buffer_index % count, eos);
+		if( err != ISAUDK_SUCCESS )
+		{
+			if( err == ISAUDK_AGAIN )
+			{
+				break;
+			}
+			else
+				return err;
+		}
+		if( *eos ) break;
+	}
+
+	*start = buffer_index % count;
+
+	return ISAUDK_SUCCESS;
+}
+
+
+int main( int argc, char **argv )
+{
+
+	char *input_file = NULL;
+	uint64_t start_time;
+
+	int stop_idx;
+	isaudk_parse_error_t parse_error;
+
+	struct isaudk_format format;
+	isaudk_stream_handle_t stream_handle;
+	isaudk_error_t err;
+	SNDFILE *audiofile = NULL;
+	SF_INFO af_info, pre_info;
+	isaudk_sample_rate_t rate;
+	bool eos;
+	bool roll;
+
+
+	isaudk_sample_block_t *buffer;
+	size_t buffer_count, buffer_index_prev, buffer_index = 0;
+	isaudk_signal_t buffer_signal;
+
+	struct isaudk_system_time requested_start_time, actual_start_time;
+
+	struct isaudk_arg args[] =
+	{
+		ISAUDK_DECLARE_REQUIRED_ARG(START_TIME,&start_time),
+		ISAUDK_DECLARE_REQUIRED_ARG(INPUT_FILE,&input_file),
+	};
+
+	stop_idx = isaudk_parse_args( args, sizeof(args)/sizeof(args[0]),
+				      argc-1, argv+1, &parse_error );
+	if( parse_error != ISAUDK_PARSE_SUCCESS )
+	{
+		printf( "Error parsing arguments\n" );
+		return -1;
+	}
+
+	memset( &af_info, 0, sizeof( af_info ));
+	memset( &pre_info, 0, sizeof( pre_info ));
+	if( input_file != NULL ) {
+		audiofile = sf_open( input_file, SFM_READ, &af_info );
+	}
+	if( audiofile == NULL )
+	{
+		printf( "Unable to open audio file: %s\n",
+			input_file == NULL ? "(unspecified)" : input_file );
+		return -1;
+	}
+
+	format.encoding = ISAUDK_ENC_PS16;
+	format.channels = af_info.channels;
+	rate = af_info.samplerate / ISAUDK_RATE_MULTIPLIER;
+	err = isaudk_open_stream
+		( &stream_handle, &format, rate, ISAUDK_RENDER );
+
+	isaudk_get_stream_buffers( stream_handle, &buffer, &buffer_count,
+				   &buffer_signal );
+
+	//fill audio buffer
+	buffer_index_prev = 0;
+	err = readf_short_multi_eos_detect
+		( audiofile, stream_handle, format.channels, buffer,
+		  &buffer_index_prev, buffer_count, buffer_count, &eos,
+		  false);
+	if( err != ISAUDK_SUCCESS )
+	{
+		printf( "Failed to write audio buffer\n" );
+		return -1;
+	}
+
+
+	requested_start_time.time = start_time;
+	isaudk_start_stream_at( stream_handle, requested_start_time);
+
+	buffer_index_prev = 0;
+	while( !eos )
+	{
+		// Wait for signal
+		isaudk_signal_wait( buffer_signal, 0 );
+
+		// Get HW position
+		buffer_index = isaudk_get_stream_buffer_index
+			( stream_handle, &roll );
+		if (buffer_index == ISAUDK_INVALIDTIME) { break; }
+
+		// Write up to HW position
+		err = readf_short_multi_eos_detect
+			( audiofile, stream_handle, format.channels, buffer,
+			  &buffer_index_prev, buffer_index, buffer_count,
+			  &eos, roll);
+		if( err != ISAUDK_SUCCESS )
+		{
+			printf( "Failed to write audio buffer\n" );
+			return -1;
+		}
+
+	}
+
+	err = isaudk_get_stream_audio_start_time( stream_handle, &actual_start_time );
+	printf("%lu/n", actual_start_time.time);
+
+	if (err == ISAUDK_INVALIDTIME) { return -1; }
+	return 0;
+}
diff --git a/examples/alsa_timed_audio/record_file_at.c b/examples/alsa_timed_audio/record_file_at.c
new file mode 100644
index 00000000..be7d420d
--- /dev/null
+++ b/examples/alsa_timed_audio/record_file_at.c
@@ -0,0 +1,190 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+//! \page record_at Record file at time
+//!
+//! This application records a file at the specified time. The command line is:
+//! <br><br><tt>
+//! record_file_at -st=\<start time\> -of=\<output file\>
+//! </tt><br><br>
+//! A start time of zero means start now
+//!
+//! At exit the actual start time is printed to standard out
+
+#include <sdk.h>
+#include <args.h>
+
+#include <sndfile.h>
+#include <stdio.h>
+#include <string.h>
+
+#define NANOSEC_PER_MILLISEC	(1000000ULL)
+#define NANOSEC_PER_SEC		(1000000000)
+#define DEFAULT_DURATION	(5000)
+
+// Returns sample count (round up) given milliseconds
+static uint32_t
+milliseconds_to_samples( uint32_t millis, isaudk_sample_rate_t rate )
+{
+	uint64_t ret;
+	uint32_t tmp;
+
+	ret = millis*NANOSEC_PER_MILLISEC;
+	tmp = NANOSEC_PER_SEC / ( rate * ISAUDK_RATE_MULTIPLIER );
+	ret = ret / tmp + (ret % tmp > 0 ? 1 : 0);
+
+	return ret;
+}
+
+static isaudk_error_t
+write_buffer_to_disk( SNDFILE *sndfile, isaudk_stream_handle_t stream,
+		      uint8_t channels, isaudk_sample_block_t *buffer,
+		      size_t *start_idx, size_t stop_idx, size_t count,
+		      bool roll, size_t *sample_count )
+{
+	size_t current_idx;
+	isaudk_error_t err;
+	sf_count_t sf_count;
+
+	if( stop_idx < *start_idx || ( stop_idx == *start_idx && roll ))
+		stop_idx += count;
+
+	for( current_idx = *start_idx; current_idx < stop_idx; ++current_idx )
+	{
+		sf_count = sf_writef_short
+			( sndfile, buffer[current_idx % count].PS16,
+			  PS16_SAMPLE_COUNT / channels );
+		if( sf_count != PS16_SAMPLE_COUNT / channels )
+			return ISAUDK_FATAL;
+
+		*sample_count = *sample_count + sf_count;
+
+		err = isaudk_stream_mark_buffer_done
+			( stream, current_idx % count );
+		if( err != ISAUDK_SUCCESS )
+		{
+			if( err == ISAUDK_AGAIN )
+				break;
+
+			else
+				return err;
+
+		}
+	}
+	*start_idx = current_idx % count;
+
+	return ISAUDK_SUCCESS;
+}
+
+int main( int argc, char **argv )
+{
+	char *output_file = NULL;
+	uint64_t start_time;
+	uint32_t duration = DEFAULT_DURATION;
+
+	int stop_idx;
+	isaudk_parse_error_t parse_error;
+
+	SNDFILE *audiofile = NULL;
+	SF_INFO af_info;
+
+	isaudk_stream_handle_t stream_handle;
+	struct isaudk_format format;
+	isaudk_sample_rate_t rate;
+
+	isaudk_sample_block_t *buffer;
+	size_t buffer_count;
+	isaudk_signal_t buffer_signal;
+	size_t capture_index, prev_capture_index;
+	bool roll;
+	struct isaudk_system_time actual_start_time;
+
+	size_t sample_count;
+
+	struct isaudk_arg args[] =
+	{
+		ISAUDK_DECLARE_REQUIRED_ARG(START_TIME,&start_time),
+		ISAUDK_DECLARE_REQUIRED_ARG(OUTPUT_FILE,&output_file),
+		ISAUDK_DECLARE_OPTIONAL_ARG(DURATION,&duration),
+	};
+
+	stop_idx = isaudk_parse_args( args, sizeof(args)/sizeof(args[0]),
+				      argc-1, argv+1, &parse_error );
+	if( parse_error != ISAUDK_PARSE_SUCCESS )
+	{
+		printf( "Error parsing arguments\n" );
+		return -1;
+	}
+
+	memset( &af_info, 0, sizeof( af_info ));
+	isaudk_open_default_stream( &stream_handle, ISAUDK_CAPTURE );
+	isaudk_get_stream_info( stream_handle, &format, &rate, NULL );
+	af_info.samplerate = rate * ISAUDK_RATE_MULTIPLIER;
+	af_info.channels = format.channels;
+	af_info.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
+	if( output_file != NULL )
+		audiofile = sf_open( output_file, SFM_WRITE, &af_info );
+	if( audiofile == NULL )
+	{
+		printf( "Unable to open audio file: %s\n",
+			output_file == NULL ? "(unspecified)" : output_file );
+		return -1;
+	}
+
+	isaudk_get_stream_buffers( stream_handle, &buffer, &buffer_count,
+				   &buffer_signal );
+
+	isaudk_start_stream_at( stream_handle, ISAUDK_PLAY_IMMED );
+
+	prev_capture_index = 0;
+	sample_count = 0;
+	while( sample_count < milliseconds_to_samples( duration, rate ))
+	{
+		isaudk_signal_wait( buffer_signal, 0 );
+
+		capture_index = isaudk_get_stream_buffer_index
+			( stream_handle, &roll );
+
+		write_buffer_to_disk( audiofile, stream_handle,
+				      format.channels, buffer,
+				      &prev_capture_index, capture_index,
+				      buffer_count, roll, &sample_count );
+	}
+
+	isaudk_get_stream_start_time( stream_handle, &actual_start_time );
+	printf( "Start time: %lu\n", actual_start_time.time );
+
+	sf_close( audiofile );
+
+	return 0;
+}
diff --git a/examples/alsa_timed_audio/sdk.h b/examples/alsa_timed_audio/sdk.h
new file mode 100644
index 00000000..82f8a93b
--- /dev/null
+++ b/examples/alsa_timed_audio/sdk.h
@@ -0,0 +1,372 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef SDK_H
+#define SDK_H
+
+#include <bool.h>
+
+#include <thread_signal.h>
+
+#include <stdint.h>
+#include <unistd.h>
+
+//! \addtogroup StreamAPI Stream API
+//! The Stream API is is used to create time synchronized audio applications.
+//! It implements a mixer and capture module that are time-aware. The API is
+//! similar in scope (albeit simplified) to PulseAudio adding calls to start
+//! audio at a requested system time and returns the actual start time. It
+//! provides a simplified API as well as a mixer that is able to mix streams
+//! with a precision of +/- .5 sample.
+
+//! \typedef isaudk_stream_handle_t
+//! \brief Audio stream reference
+//! \detail	Each is either capture or render
+//!
+//! \typedef isaudk_mixer_handle_t
+//! \brief Audio mixer reference.
+//! \details	One per audio output device. Default mixer is sufficient for
+//!		most users
+//!
+//! \typedef isaudk_capture_handle_t
+//! \brief Audio capture reference.
+//! \details	One per audio input device. Default capture is sufficient for
+//!		most users
+//!
+typedef struct isaudk_stream_handle*	isaudk_stream_handle_t;
+typedef struct isaudk_mixer_handle*	isaudk_mixer_handle_t;
+typedef struct isaudk_capture_handle*	isaudk_capture_handle_t;
+
+//! \enum isaudk_direction_t
+//! \brief Stream direction.
+//! \details	Either render or capture
+typedef enum
+{
+	ISAUDK_RENDER,		//!< Render stream
+	ISAUDK_CAPTURE,		//!< Capture stream
+} isaudk_direction_t;
+
+// \enum isaudk_mode_t
+// \either pre-play mode (playing zeros)
+// \or audio-play mode (playing audio file)
+typedef enum
+{
+	ISAUDK_SILENCE,		//play silence
+	ISAUDK_AUDIO,		//play audio
+} isaudk_mode_t;
+
+//! \enum isaudk_error_t
+//! \brief Error return value.
+typedef enum
+{
+	ISAUDK_SUCCESS,	    	//!< No error
+	ISAUDK_NOMEMORY,	//!< Failed to allocate dynamic memory
+	ISAUDK_PTHREAD,		//!< Error internal to pthread library
+	ISAUDK_BADFORMAT,	//!< Requested format is unavailable
+	ISAUDK_INVALIDARG,	//!< One or more arguments are invalid
+	ISAUDK_UNIMPL,		//!< Feature not implemented
+	ISAUDK_AGAIN,		//!< Procedure may succeed if called again
+	ISAUDK_FATAL,		//!< Error is unrecoverable, system error
+	ISAUDK_INVALIDTIME = 255,	//!< An invalid start time was requested
+} isaudk_error_t;
+
+//! \enum isaudk_encoding_t
+//! \brief Frame sample encoding.
+//! \details	Includes frame layout (e.g. default is interleaved)
+typedef enum
+{
+	ISAUDK_ENC_NONE,	//!< Defer format
+	ISAUDK_ENC_PS16 = 0x02,	//!< PCM signed 16 bit
+} isaudk_encoding_t;
+
+//! \def PS16_SAMPLE_COUNT
+//! \brief 16 bit signed sample count per sample block.
+//!
+//! \def PS16_JUMBO_SAMPLE_COUNT
+//! \brief 16 bit signed sample count per jumbo sample block.
+//!
+#define PS16_SAMPLE_COUNT 2016
+#define PS16_JUMBO_SAMPLE_COUNT 24576
+
+//! \struct isaudk_format
+//! \brief Audio frame format.
+//! \details	Consists of sample encoding (including frame layout e.g.
+//!		interleaved is default) and number of channels
+struct isaudk_format
+{
+	isaudk_encoding_t encoding; //!< per-sample encoding / frame layout
+	uint8_t channels;	    //!< channel count
+};
+
+//! \def ISAUDK_RATE_MULTIPLIER
+//! \brief Multiplier for sample rate constant.
+//! \details	Results in number of samples per second
+//!
+//! \typedef isaudk_sample_rate_t
+//! \brief Sample rate.
+//! \details	multiply by rate multiplier for samples per second
+//!		\see ISAUDK_RATE_MULTIPLIER
+//! \var _48K_SAMPLE_RATE
+//! \brief 48 KHz sample rate
+#define ISAUDK_RATE_MULTIPLIER 25
+typedef unsigned short isaudk_sample_rate_t;
+extern const isaudk_sample_rate_t _48K_SAMPLE_RATE;
+
+
+//! \union isaudk_sample_block_t
+//! \brief Sample block.
+//! \details	Maximum 4096 byte block containing a whole number of audio
+//!		frames for common channel configuration and sample sizes
+typedef union
+{
+	int16_t PS16[2*PS16_SAMPLE_COUNT]; //!< 16 bit signed sample values
+} isaudk_sample_block_t;
+
+//! \union isaudk_jumbo_sample_block_t
+//! \brief Large sample block.
+//! \details	Maximum 12 x 4096 byte block containing a whole number of audio
+//!		frames for common channel configuration and sample sizes.
+//!		Contains several milliseconds of audio at high sample rates
+//!		and 8 channel audio
+typedef union
+{
+	int16_t PS16[PS16_JUMBO_SAMPLE_COUNT];
+} isaudk_jumbo_sample_block_t;
+
+//! \struct isaudk_system_time
+//! \brief Local system time.
+//! \details	In terms of POSIX-ish CLOCK_MONOTONIC_RAW
+struct isaudk_system_time
+{
+	uint64_t time; //!< 64-bit system time scalar
+};
+
+//! \var ISAUDK_PLAY_IMMED
+//! \brief system time indicating that playback or record begins immediately
+extern const struct isaudk_system_time ISAUDK_PLAY_IMMED;
+
+//! \struct isaudk_audio_time
+//! \brief Audio device time.
+//! \details	Is the sample count multiplied by nominal nanoseconds per
+//!		sample. Includes fractional samples.
+struct isaudk_audio_time
+{
+	uint64_t time;
+};
+
+//! \struct isaudk_cross_time
+//! \brief Correlated audio and system time.
+//! \details	Captured simultaneously. Degree of simultaneity depends on
+//!		timestamp function of underlying audio driver. If available,
+//!		ALSA can capture timestamps using hardware
+struct isaudk_cross_time
+{
+	struct isaudk_system_time	sys;
+	struct isaudk_audio_time	dev;
+};
+
+//! \brief Check cross-timestamps for equality
+//!
+//! \param a one cross-timestamp
+//! \param b another cross-timestamp
+//!
+//! \return true if cross-timestamps are equal
+static inline bool
+isaudk_crosstime_equal( const struct isaudk_cross_time *a,
+			const struct isaudk_cross_time *b )
+{
+	if( a->sys.time != b->sys.time )
+		return false;
+	if( a->dev.time != b->dev.time )
+		return false;
+
+	return true;
+}
+
+//! \brief Opens render stream.
+//! \details	Using specified mixer.
+//! \ingroup StreamAPI
+//!
+//! \param handle[out]		stream_handle
+//! \param format[in]		audio frame format
+//! \param rate[in]		sample rate
+//! \param mixer[in]		mixer handle (NULL: use default)
+//!
+//! \return Return code
+isaudk_error_t
+isaudk_open_stream_mixer( isaudk_stream_handle_t *handle,
+			  struct isaudk_format *format,
+			  isaudk_sample_rate_t rate,
+			  isaudk_mixer_handle_t mixer );
+
+//! \brief Opens capture stream.
+//! \details	Using specified capture module.
+//! \ingroup StreamAPI
+//!
+//! \param handle[out]		stream_handle
+//! \param format[in]		audio frame format
+//! \param rate[in]		sample rate
+//! \param capture[in]		capture module handle (NULL: use default)
+//!
+//! \return Return code
+isaudk_error_t
+isaudk_open_stream_capture( isaudk_stream_handle_t *handle,
+			  struct isaudk_format *format,
+			  isaudk_sample_rate_t rate,
+			  isaudk_capture_handle_t capture );
+
+//! \brief Opens stream.
+//! \details	Using default mixer or capture module.
+//! \ingroup StreamAPI
+//!
+//! \param handle[out]		stream_handle
+//! \param format[in]		audio frame format
+//! \param rate[in]		sample rate
+//! \param direction[in]	specify capture or render \see
+//!				isaudk_direction_t
+//! \return Return code
+isaudk_error_t
+isaudk_open_stream( isaudk_stream_handle_t *handle,
+		    struct isaudk_format *format,
+		    isaudk_sample_rate_t rate,
+		    isaudk_direction_t direction );
+
+//! \brief Opens stream using default stream format/rate.
+//! \ingroup StreamAPI
+//!
+//! \param handle[out]		stream_handle
+//! \param direction[in]	specify capture or render \see
+//!				isaudk_direction_t
+//! \return Return code
+isaudk_error_t
+isaudk_open_default_stream( isaudk_stream_handle_t *handle,
+			    isaudk_direction_t direction );
+
+//! \brief Get stream info.
+//! \details	Useful after stream is opened using default parameters
+//!		\see isaudk_open_default_stream
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param format[out]		audio frame format
+//! \param rate[out]		sample rate
+//! \param direction[out]	specify capture or render \see
+//!				isaudk_direction_t
+//! \return Return code
+isaudk_error_t
+isaudk_get_stream_info( isaudk_stream_handle_t handle,
+			struct isaudk_format *format,
+			isaudk_sample_rate_t *rate,
+			isaudk_direction_t *direction );
+
+//! \brief Get buffers.
+//! \details	Exchange data with mixer or capture module.
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param buffer[out]		audio buffer array
+//! \param count[out]		buffer array size
+//! \param signal[out]		signals when mixer is ready for more data or
+//!				capture stream is ready for reading
+//! \return Return code
+void
+isaudk_get_stream_buffers( isaudk_stream_handle_t handle,
+			   isaudk_sample_block_t **buffer, size_t *count,
+			   isaudk_signal_t *signal );
+
+//! \brief Get buffers.
+//! \details	Useful after stream is opened using default parameters
+//!		\see isaudk_open_default_stream
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param buffer[out]		audio buffer array
+//! \param count[out]		buffer array size
+//! \param signal[out]		signals when mixer is ready for more data or
+//!				capture stream is ready for reading
+//! \return Return code
+isaudk_error_t
+isaudk_stream_set_buffer_sample_count( isaudk_stream_handle_t handle,
+				       size_t idx, size_t count, bool eos );
+
+//! \brief Get current buffer index for render.
+//! \details	Useful after stream is opened using default parameters
+//!		\see isaudk_open_default_stream
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param roll[out]		Current buffer index is ready to read, may
+//!				indicate that wrap-around has occured
+//! \return Buffer index
+uint8_t
+isaudk_get_stream_buffer_index( isaudk_stream_handle_t handle, bool *roll );
+
+//! \brief Mark buffer index as consumed.
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param idx[in]		Buffer index consumed
+//!
+//! \return Return code
+isaudk_error_t
+isaudk_stream_mark_buffer_done( isaudk_stream_handle_t stream, size_t idx );
+
+//! \brief Request stream start time.
+//! \details	Is accurated within 1 samples period. \see ISAUDK_PLAY_IMMED
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param start_time[out]	Start time in nanoseconds
+//!
+//! \return Return code
+isaudk_error_t
+isaudk_start_stream_at( isaudk_stream_handle_t handle,
+			struct isaudk_system_time start_time );
+
+//! \brief Get actual stream start time.
+//! \details	In nanosecond units, accurate within system clock tick
+//!		usually sub-microsecond
+//! \ingroup StreamAPI
+//!
+//! \param handle[in]		stream_handle
+//! \param roll[out]		Current buffer index is ready to read, may
+//!				indicate that wrap-around has occured
+//! \return Return code
+isaudk_error_t
+isaudk_get_stream_start_time( isaudk_stream_handle_t handle,
+		       struct isaudk_system_time *start_time );
+isaudk_error_t
+isaudk_get_stream_audio_start_time( isaudk_stream_handle_t handle,
+		       struct isaudk_system_time *start_time );
+
+#endif/*SDK_H*/
diff --git a/examples/alsa_timed_audio/stack.c b/examples/alsa_timed_audio/stack.c
new file mode 100644
index 00000000..bff41a74
--- /dev/null
+++ b/examples/alsa_timed_audio/stack.c
@@ -0,0 +1,52 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <stack.h>
+#include <stdlib.h>
+
+stack_element_t *
+pop( stack_t stack )
+{
+	linked_list_element_t tmp;
+	linked_list_element_t *ret = NULL;
+
+	if( !ll_is_valid( stack ))
+		return NULL;
+	tmp = ll_get_head( stack );
+	if( tmp != NULL ) {
+		ll_remove_head( stack );
+		ret = ll_get_addr( tmp );
+	}
+
+	return ret;
+}
diff --git a/examples/alsa_timed_audio/stack.h b/examples/alsa_timed_audio/stack.h
new file mode 100644
index 00000000..495a004c
--- /dev/null
+++ b/examples/alsa_timed_audio/stack.h
@@ -0,0 +1,50 @@
+#ifndef STACK_H
+#define STACK_H
+
+#include <linked_list.h>
+
+typedef linked_list_t stack_t;
+typedef linked_list_element_t stack_element_t;
+
+#define STATIC_STACK_INIT NULL
+
+static inline stack_t stack_init()
+{
+	return ll_init();
+}
+
+static inline stack_t stack_alloc()
+{
+	return ll_alloc();
+}
+
+static inline bool stack_is_valid( stack_t stack )
+{
+	return ll_is_valid( stack );
+}
+
+static inline void stack_init_element( stack_element_t *element )
+{
+	ll_init_element( element );
+}
+
+
+static inline bool push( stack_t stack, stack_element_t *element )
+{
+	return ll_add_head( stack, element );
+}
+
+static inline void free_stack_element( stack_element_t *element )
+{
+	ll_free_element( element );
+}
+
+static inline linked_list_t get_list( stack_t stack )
+{
+	return (linked_list_t) stack;
+}
+
+stack_element_t *
+pop( stack_t stack );
+
+#endif/*STACK_H*/
diff --git a/examples/alsa_timed_audio/stream.c b/examples/alsa_timed_audio/stream.c
new file mode 100644
index 00000000..c060eb68
--- /dev/null
+++ b/examples/alsa_timed_audio/stream.c
@@ -0,0 +1,394 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <sdk.h>
+#include <util.h>
+#include <stack.h>
+#include <mixer.h>
+#include <capture.h>
+
+#include <stdlib.h>
+#include <limits.h>
+
+enum isaudk_stream_state {
+	ISAUDK_STREAM_RUNNING,
+	ISAUDK_STREAM_STOPPED,
+};
+
+struct isaudk_stream_handle {
+	isaudk_direction_t direction;
+	enum isaudk_stream_state state;
+	struct isaudk_system_time req_start_time;
+	union {
+		isaudk_mixer_handle_t mixer;
+		isaudk_capture_handle_t capture;
+	};
+
+	union {
+		void *mixer_private;
+		void *capture_private;
+	};
+
+	stack_element_t stream_stack_element;
+	linked_list_element_t mixer_list_element;
+};
+
+#define HANDLE_ALLOCATION_COUNT 4
+
+const struct isaudk_cross_time
+INVALID_CROSS_TIME = { .sys = { .time = ULLONG_MAX },
+		       .dev = { .time = 0 }};
+
+const isaudk_sample_rate_t DEFAULT_SAMPLE_RATE = 0;
+
+const isaudk_sample_rate_t _48K_SAMPLE_RATE = 48000/ISAUDK_RATE_MULTIPLIER;
+const struct isaudk_system_time ISAUDK_PLAY_IMMED = { .time = 0 };
+
+static stack_t stream_handle_free = STATIC_STACK_INIT;
+static stack_t stream_handle_use = STATIC_STACK_INIT;
+
+#define stackelement_to_stream( strm_stack_element ) \
+	container_addr( stream_stack_element, strm_stack_element,	\
+			struct isaudk_stream_handle );
+
+#define mixer_listelement_to_stream( mixr_list_element ) \
+	container_addr( mixer_list_element, mixr_list_element,	\
+			struct isaudk_stream_handle );
+
+bool check_stack( stack_t *stack )
+{
+	if( !stack_is_valid( *stack )) {
+		*stack = stack_alloc();
+		if( !stack_is_valid( *stack ))
+			return false;
+	}
+
+	return true;
+}
+
+
+// Cleans up all stream state, called on unload
+void stream_cleanup( void )
+{
+	// Delete all stream state
+}
+
+static bool
+allocate_stream_handle( void )
+{
+	int i;
+
+	if( !check_stack( &stream_handle_free ))
+		return ISAUDK_NOMEMORY;
+
+	struct isaudk_stream_handle *handle = (__typeof__(handle))
+		malloc((size_t) HANDLE_ALLOCATION_COUNT*sizeof(*handle));
+	if( handle == NULL )
+		return false;
+
+	for( i = 0; i < HANDLE_ALLOCATION_COUNT; ++i )
+	{
+		stack_init_element( &( handle+i )->stream_stack_element );
+		ll_init_element( &( handle+i )->mixer_list_element );
+		push( stream_handle_free,
+		      &( handle+i )->stream_stack_element );
+	}
+
+	return true;
+}
+
+static isaudk_error_t
+isaudk_allocate_stream( struct isaudk_stream_handle **handle,
+			isaudk_direction_t direction )
+{
+	stack_element_t *stream_stack_element;
+
+	stream_stack_element = pop( stream_handle_free );
+	if( stream_stack_element == NULL ) {
+		if( allocate_stream_handle() )
+			stream_stack_element = pop( stream_handle_free );
+		else
+			return ISAUDK_NOMEMORY;
+	}
+	*handle = stackelement_to_stream( stream_stack_element );
+	(*handle)->direction = direction;
+
+	if( !check_stack( &stream_handle_use ))
+		return ISAUDK_NOMEMORY;
+
+	push( stream_handle_use, stream_stack_element );
+
+	return ISAUDK_SUCCESS;
+}
+
+#if 0
+static isaudk_error_t
+isaudk_deallocate_stream( struct isaudk_stream_handle **handle )
+{
+}
+#endif
+
+isaudk_error_t
+isaudk_open_stream_capture( struct isaudk_stream_handle **handle,
+			    struct isaudk_format *format,
+			    isaudk_sample_rate_t rate,
+			    isaudk_capture_handle_t capture )
+{
+	isaudk_error_t err;
+
+	err = isaudk_allocate_stream( handle, ISAUDK_CAPTURE );
+	if( err != ISAUDK_SUCCESS )
+		return err;
+
+	if( capture != NULL )
+		(*handle)->capture = capture;
+	else
+		(*handle)->capture = isaudk_get_default_capture();
+
+	return isaudk_capture_register_stream
+		( (*handle)->capture, *handle, format, rate );
+}
+
+isaudk_error_t
+isaudk_open_stream_mixer( struct isaudk_stream_handle **handle,
+			  struct isaudk_format *format,
+			  isaudk_sample_rate_t rate,
+			  isaudk_mixer_handle_t mixer )
+{
+	isaudk_error_t err;
+
+	err = isaudk_allocate_stream( handle, ISAUDK_RENDER );
+	if( err != ISAUDK_SUCCESS )
+		return err;
+
+	if( mixer != NULL )
+		(*handle)->mixer = mixer;
+	else
+		(*handle)->mixer = isaudk_get_default_mixer();
+
+	return isaudk_mixer_register_stream
+		( (*handle)->mixer, *handle, format, rate );
+}
+
+isaudk_error_t
+isaudk_open_stream( struct isaudk_stream_handle **handle,
+		    struct isaudk_format *format,
+		    isaudk_sample_rate_t rate,
+		    isaudk_direction_t direction )
+{
+	if( direction == ISAUDK_RENDER )
+		return isaudk_open_stream_mixer( handle, format, rate, NULL );
+	else
+		return isaudk_open_stream_capture
+			( handle, format, rate, NULL );
+
+	return ISAUDK_UNIMPL; // Place holder for capture
+}
+
+isaudk_error_t
+isaudk_open_default_stream( struct isaudk_stream_handle **handle,
+			    isaudk_direction_t direction )
+{
+	return isaudk_open_stream( handle, NULL, DEFAULT_SAMPLE_RATE,
+				   direction );
+}
+
+
+isaudk_error_t
+isaudk_get_stream_info( struct isaudk_stream_handle *handle,
+			struct isaudk_format *format,
+			isaudk_sample_rate_t *rate,
+			isaudk_direction_t *direction )
+{
+	if( direction != NULL )
+		*direction = handle->direction;
+	if( handle->direction == ISAUDK_RENDER )
+	{
+		return isaudk_mixer_get_stream_info
+			( handle->mixer, format, rate );
+	}
+	else
+	{
+		return isaudk_capture_get_stream_info
+			( handle->capture, format, rate );
+	}
+
+	return ISAUDK_UNIMPL;
+}
+
+void
+isaudk_get_stream_buffers( struct isaudk_stream_handle *handle,
+			   isaudk_sample_block_t **buffer, size_t *count,
+			   isaudk_signal_t *signal )
+{
+	unsigned u_count;
+
+	if( handle->direction == ISAUDK_RENDER )
+		isaudk_mixer_get_stream_buffer
+			( handle, buffer, &u_count, signal );
+	else
+		isaudk_capture_get_stream_buffer
+			( handle, buffer, &u_count, signal );
+
+	*count = u_count;
+}
+
+uint8_t
+isaudk_get_stream_buffer_index( struct isaudk_stream_handle *handle,
+				bool *roll )
+{
+	if( handle->direction == ISAUDK_RENDER )
+		return isaudk_mixer_get_current_index( handle, roll );
+	else
+		return isaudk_capture_get_current_index( handle, roll );
+
+	return ISAUDK_UNIMPL;
+}
+
+bool
+isaudk_get_stream_flag( struct isaudk_stream_handle *handle )
+{
+	return isaudk_mixer_get_flag( handle );
+}
+
+void
+isaudk_clear_stream_flag( struct isaudk_stream_handle *handle )
+{
+	return isaudk_mixer_clear_flag( handle );
+}
+
+int
+isaudk_get_stream_remainder( struct isaudk_stream_handle *handle )
+{
+	return isaudk_mixer_get_remainder( handle );
+}
+
+isaudk_error_t
+isaudk_stream_set_buffer_sample_count( struct isaudk_stream_handle *handle,
+				       size_t idx, size_t count, bool eos )
+{
+	return isaudk_mixer_set_buffer_sample_count( handle, handle->mixer,
+						     idx, count, eos );
+}
+
+isaudk_error_t
+isaudk_start_stream_at( struct isaudk_stream_handle *handle,
+			struct isaudk_system_time start_time )
+{
+//	if( start_time.time != ISAUDK_PLAY_IMMED.time )
+//		return ISAUDK_UNIMPL;
+
+
+	if( handle->direction == ISAUDK_RENDER )
+		return isaudk_start_mixer( handle->mixer, start_time );
+	else
+		return isaudk_start_capture( handle->capture );
+
+	return ISAUDK_UNIMPL;
+}
+
+isaudk_error_t
+isaudk_get_stream_start_time( isaudk_stream_handle_t handle,
+			      struct isaudk_system_time *start_time )
+{
+	if( handle->direction == ISAUDK_RENDER )
+		return isaudk_mixer_get_start_time
+			( handle->mixer, start_time );
+	else
+		return isaudk_capture_get_start_time
+			( handle->capture, start_time );
+
+	return ISAUDK_UNIMPL;
+}
+
+isaudk_error_t
+isaudk_get_stream_audio_start_time( isaudk_stream_handle_t handle,
+			      struct isaudk_system_time *start_time )
+{
+	if (start_time->time == 0xFFFFFF)
+		return ISAUDK_INVALIDTIME;
+	if( handle->direction == ISAUDK_RENDER )
+		return isaudk_mixer_get_audio_start_time
+			( handle->mixer, start_time );
+	else
+		return isaudk_capture_get_start_time
+			( handle->capture, start_time );
+
+	return ISAUDK_UNIMPL;
+}
+
+void
+isaudk_stream_set_mixer_private
+( struct isaudk_stream_handle *handle, void *priv )
+{
+	handle->mixer_private = priv;
+}
+
+void *
+isaudk_stream_get_mixer_private( struct isaudk_stream_handle *handle )
+{
+	return handle->mixer_private;
+}
+
+void isaudk_stream_set_capture_private
+( struct isaudk_stream_handle *handle, void *priv )
+{
+	handle->capture_private = priv;
+}
+
+void *isaudk_stream_get_capture_private( isaudk_stream_handle_t handle )
+{
+	return handle->capture_private;
+}
+
+linked_list_element_t *
+isaudk_get_stream_mixer_reference( struct isaudk_stream_handle *handle )
+{
+	return &handle->mixer_list_element;
+}
+
+struct isaudk_stream_handle *isaudk_mixer_reference_to_stream
+( linked_list_element_t *mix_ref )
+{
+	return mixer_listelement_to_stream( mix_ref );
+}
+
+isaudk_error_t
+isaudk_stream_mark_buffer_done( struct isaudk_stream_handle *stream,
+				size_t idx )
+{
+	if( stream->direction != ISAUDK_CAPTURE )
+		return ISAUDK_INVALIDARG;
+
+	return isaudk_capture_mark_buffer_done( stream, stream->capture, idx );
+}
diff --git a/examples/alsa_timed_audio/stream.h b/examples/alsa_timed_audio/stream.h
new file mode 100644
index 00000000..da6c5368
--- /dev/null
+++ b/examples/alsa_timed_audio/stream.h
@@ -0,0 +1,61 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef STREAM_H
+#define STREAM_H
+
+#include <sdk.h>
+#include <linked_list.h>
+
+extern const struct isaudk_cross_time INVALID_CROSS_TIME;
+extern const isaudk_sample_rate_t DEFAULT_SAMPLE_RATE;
+
+// These functions are for internal use
+
+linked_list_element_t *
+isaudk_get_stream_mixer_reference( isaudk_stream_handle_t handle );
+
+isaudk_stream_handle_t isaudk_mixer_reference_to_stream
+( linked_list_element_t *mix_ref );
+
+void isaudk_stream_set_mixer_private
+( struct isaudk_stream_handle *handle, void *priv );
+
+void *isaudk_stream_get_mixer_private( isaudk_stream_handle_t handle );
+
+void isaudk_stream_set_capture_private
+( struct isaudk_stream_handle *handle, void *priv );
+
+void *isaudk_stream_get_capture_private( isaudk_stream_handle_t handle );
+
+#endif/*STREAM_H*/
diff --git a/examples/alsa_timed_audio/thread_signal.c b/examples/alsa_timed_audio/thread_signal.c
new file mode 100644
index 00000000..c7cab3e7
--- /dev/null
+++ b/examples/alsa_timed_audio/thread_signal.c
@@ -0,0 +1,182 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#include <thread_signal.h>
+#include <sdk.h>
+
+#include <pthread.h>
+#include <stdlib.h>
+#include <errno.h>
+
+struct isaudk_signal
+{
+	pthread_cond_t cond;
+	pthread_mutex_t mutex;
+	bool signaled;
+};
+
+isaudk_signal_error_t
+isaudk_create_signal( struct isaudk_signal **signal )
+{
+	int err;
+
+	*signal = (struct isaudk_signal *)
+		malloc((size_t) sizeof( **signal ));
+	if( *signal == NULL )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	err = pthread_cond_init( &(*signal)->cond, NULL );
+	if( err != 0 )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	err = pthread_mutex_init( &(*signal)->mutex, NULL );
+	if( err != 0 )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	return ISAUDK_SIGNAL_OK;
+}
+
+isaudk_signal_error_t
+isaudk_free_signal( isaudk_signal_t signal )
+{
+	int err;
+
+	err = pthread_mutex_lock( &signal->mutex );
+	if( err )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	err = pthread_cond_destroy( &signal->cond );
+	if( err )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	err = pthread_mutex_destroy( &signal->mutex );
+	if( err )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	free(( void * ) signal );
+
+	return ISAUDK_SIGNAL_OK;
+}
+
+#define NS_PER_SEC (1000000000LL)
+#define MS_PER_SEC (1000)
+#define NS_PER_MS (NS_PER_SEC/MS_PER_SEC)
+
+static inline void
+timespec_add_ns( struct timespec *ts, unsigned ns )
+{
+	ts->tv_nsec += ns % NS_PER_SEC;
+	ts->tv_sec += ns / NS_PER_SEC;
+	if( ts->tv_nsec >= NS_PER_SEC ) {
+		ts->tv_nsec -= NS_PER_SEC;
+		ts->tv_sec += 1;
+	}
+}
+
+#include <stdio.h>
+
+// Wait for signal, *wait* == 0: forever, *wait* != 0: *wait* milliseconds
+isaudk_signal_error_t
+isaudk_signal_wait( isaudk_signal_t signal, unsigned wait )
+{
+	int err;
+	isaudk_signal_error_t retval = ISAUDK_SIGNAL_OK;
+
+	err = pthread_mutex_lock( &signal->mutex );
+	if( err != 0 )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	while( !signal->signaled )
+	{
+		if( wait != 0 )
+		{
+			struct timespec timeout;
+
+			err = clock_gettime( CLOCK_REALTIME, &timeout );
+			if( err != 0 )
+			{
+				retval = ISAUDK_SIGNAL_SYSERROR;
+				goto done;
+			}
+			timespec_add_ns( &timeout, wait*NS_PER_MS );
+
+			err = pthread_cond_timedwait
+				( &signal->cond, &signal->mutex, &timeout );
+		}
+		else
+		{
+			err = pthread_cond_wait
+				( &signal->cond, &signal->mutex );
+		}
+		if( err == ETIMEDOUT )
+			goto done;
+	}
+
+	signal->signaled = false;
+
+done:
+	err = pthread_mutex_unlock( &signal->mutex );
+	if( err != 0 )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	return retval;
+}
+
+isaudk_signal_error_t
+isaudk_signal_send( isaudk_signal_t signal )
+{
+	int err;
+	isaudk_signal_error_t retval = ISAUDK_SIGNAL_OK;
+
+	err = pthread_mutex_lock( &signal->mutex );
+	if( err != 0 )
+	{
+		retval = ISAUDK_SIGNAL_SYSERROR;
+		goto done;
+	}
+
+	signal->signaled = true;
+	err = pthread_cond_broadcast( &signal->cond );
+	if( err != 0 )
+	{
+		retval = ISAUDK_SIGNAL_SYSERROR;
+		goto done;
+	}
+
+done:
+	err = pthread_mutex_unlock( &signal->mutex );
+	if( err != 0 )
+		return ISAUDK_SIGNAL_SYSERROR;
+
+	return ISAUDK_SIGNAL_OK;
+}
diff --git a/examples/alsa_timed_audio/thread_signal.h b/examples/alsa_timed_audio/thread_signal.h
new file mode 100644
index 00000000..50c37d0d
--- /dev/null
+++ b/examples/alsa_timed_audio/thread_signal.h
@@ -0,0 +1,87 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef THREAD_SIGNAL_H
+#define THREAD_SIGNAL_H
+
+//! \typedef isaudk_signal_t
+//! \brief Signal object handle
+typedef struct isaudk_signal* isaudk_signal_t;
+
+//! \enum isaudk_signal_error_t
+//! \brief Signal API return code
+typedef enum {
+	ISAUDK_SIGNAL_OK,		//!< No error
+	ISAUDK_SIGNAL_SYSERROR,		//!< Internal error
+	ISAUDK_SIGNAL_TIMEDOUT,		//!< Wait timeout
+} isaudk_signal_error_t;
+
+// Signal is created in an unsignaled state
+// Auto-reset on wait
+
+//! \brief Allocate signal object.
+//! \details	Created in unsignalled state
+//!
+//! \param signal[out]		Reference to signal object
+//!
+//! \return Return code
+isaudk_signal_error_t
+isaudk_create_signal( isaudk_signal_t *signal );
+
+//! \brief Free signal object.
+//!
+//! \param signal[in]		Reference to signal object
+//!
+//! \return Return code
+isaudk_signal_error_t
+isaudk_free_signal( isaudk_signal_t signal );
+
+//! \brief Wait for signal.
+//! \details	Set to unsignalled state after successful wait operation
+//!
+//! \param signal[in]		Reference to signal object
+//! \param wait[in]		Number of milliseconds to wait (0 = forever)
+//!
+//! \return Return code
+isaudk_signal_error_t
+isaudk_signal_wait( isaudk_signal_t signal, unsigned wait );
+
+//! \brief Send/set signal.
+//!
+//! \param signal[in]		Reference to signal object
+//!
+//! \return Return code
+isaudk_signal_error_t
+isaudk_signal_send( isaudk_signal_t signal );
+
+#endif/*THREAD_SIGNAL_H*/
diff --git a/examples/alsa_timed_audio/util.h b/examples/alsa_timed_audio/util.h
new file mode 100644
index 00000000..ccff18d8
--- /dev/null
+++ b/examples/alsa_timed_audio/util.h
@@ -0,0 +1,72 @@
+/******************************************************************************
+
+  Copyright (c) 2018, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+
+******************************************************************************/
+
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <sdk.h>
+
+#define container_addr(member, addr, type) \
+	(type *)(((char *)addr) - ((char *)&((type *)0)->member))
+
+static inline bool
+isaudk_is_format_equal( const struct isaudk_format *a,
+			const struct isaudk_format *b )
+{
+	if( a->encoding != b->encoding )
+		return false;
+	if( a->channels != b->channels )
+		return false;
+	return true;
+}
+
+static inline void *
+get_buffer_pointer( struct isaudk_format *format,
+		    isaudk_sample_block_t *buffer )
+{
+	switch( format->encoding )
+	{
+	default:
+		// Unsupported format request
+		return NULL;
+	case ISAUDK_ENC_PS16:
+		return buffer->PS16;
+	}
+
+	return NULL;
+}
+
+#define UINT8_ADD( x, y )			\
+	(( (x) + (y) ) % ( UCHAR_MAX + 1 ))
+
+#endif/*UTILS_H*/