diff options
author | Lukasz Rymanowski <lukasz.rymanowski@tieto.com> | 2013-12-05 14:59:53 +0100 |
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committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2013-12-16 17:41:56 +0200 |
commit | e47bb633c47ff4692bd8476d15ac28fe7b83af32 (patch) | |
tree | a78535096c278c2766d5d7065489acf67be5281e /android/hardware | |
parent | b8b681197e95c857be9576115d6a8c19c65e7afa (diff) | |
download | bluez-e47bb633c47ff4692bd8476d15ac28fe7b83af32.tar.gz |
android/audio: Add kitkat audio headers
This patch add audio headers required to implement A2DP audio module
Note that from all of these files #include <cutils/bitops.h> has been
removed. The only function used from this include is popcount() and it
is used in system/audio.h. Instead of this function we can use GCC
builtin function __builtin_popcount() which does what is needed.
Diffstat (limited to 'android/hardware')
-rw-r--r-- | android/hardware/audio.h | 564 | ||||
-rw-r--r-- | android/hardware/audio_effect.h | 1009 |
2 files changed, 1573 insertions, 0 deletions
diff --git a/android/hardware/audio.h b/android/hardware/audio.h new file mode 100644 index 000000000..61d92dbfd --- /dev/null +++ b/android/hardware/audio.h @@ -0,0 +1,564 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +#ifndef ANDROID_AUDIO_HAL_INTERFACE_H +#define ANDROID_AUDIO_HAL_INTERFACE_H + +#include <stdint.h> +#include <strings.h> +#include <sys/cdefs.h> +#include <sys/types.h> + +#include <hardware/hardware.h> +#include <system/audio.h> +#include <hardware/audio_effect.h> + +__BEGIN_DECLS + +/** + * The id of this module + */ +#define AUDIO_HARDWARE_MODULE_ID "audio" + +/** + * Name of the audio devices to open + */ +#define AUDIO_HARDWARE_INTERFACE "audio_hw_if" + + +/* Use version 0.1 to be compatible with first generation of audio hw module with version_major + * hardcoded to 1. No audio module API change. + */ +#define AUDIO_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1) +#define AUDIO_MODULE_API_VERSION_CURRENT AUDIO_MODULE_API_VERSION_0_1 + +/* First generation of audio devices had version hardcoded to 0. all devices with versions < 1.0 + * will be considered of first generation API. + */ +#define AUDIO_DEVICE_API_VERSION_0_0 HARDWARE_DEVICE_API_VERSION(0, 0) +#define AUDIO_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION(1, 0) +#define AUDIO_DEVICE_API_VERSION_2_0 HARDWARE_DEVICE_API_VERSION(2, 0) +#define AUDIO_DEVICE_API_VERSION_CURRENT AUDIO_DEVICE_API_VERSION_2_0 + +/** + * List of known audio HAL modules. This is the base name of the audio HAL + * library composed of the "audio." prefix, one of the base names below and + * a suffix specific to the device. + * e.g: audio.primary.goldfish.so or audio.a2dp.default.so + */ + +#define AUDIO_HARDWARE_MODULE_ID_PRIMARY "primary" +#define AUDIO_HARDWARE_MODULE_ID_A2DP "a2dp" +#define AUDIO_HARDWARE_MODULE_ID_USB "usb" +#define AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX "r_submix" +#define AUDIO_HARDWARE_MODULE_ID_CODEC_OFFLOAD "codec_offload" + +/**************************************/ + +/** + * standard audio parameters that the HAL may need to handle + */ + +/** + * audio device parameters + */ + +/* BT SCO Noise Reduction + Echo Cancellation parameters */ +#define AUDIO_PARAMETER_KEY_BT_NREC "bt_headset_nrec" +#define AUDIO_PARAMETER_VALUE_ON "on" +#define AUDIO_PARAMETER_VALUE_OFF "off" + +/* TTY mode selection */ +#define AUDIO_PARAMETER_KEY_TTY_MODE "tty_mode" +#define AUDIO_PARAMETER_VALUE_TTY_OFF "tty_off" +#define AUDIO_PARAMETER_VALUE_TTY_VCO "tty_vco" +#define AUDIO_PARAMETER_VALUE_TTY_HCO "tty_hco" +#define AUDIO_PARAMETER_VALUE_TTY_FULL "tty_full" + +/* A2DP sink address set by framework */ +#define AUDIO_PARAMETER_A2DP_SINK_ADDRESS "a2dp_sink_address" + +/* Screen state */ +#define AUDIO_PARAMETER_KEY_SCREEN_STATE "screen_state" + +/** + * audio stream parameters + */ + +#define AUDIO_PARAMETER_STREAM_ROUTING "routing" // audio_devices_t +#define AUDIO_PARAMETER_STREAM_FORMAT "format" // audio_format_t +#define AUDIO_PARAMETER_STREAM_CHANNELS "channels" // audio_channel_mask_t +#define AUDIO_PARAMETER_STREAM_FRAME_COUNT "frame_count" // size_t +#define AUDIO_PARAMETER_STREAM_INPUT_SOURCE "input_source" // audio_source_t +#define AUDIO_PARAMETER_STREAM_SAMPLING_RATE "sampling_rate" // uint32_t + +/* Query supported formats. The response is a '|' separated list of strings from + * audio_format_t enum e.g: "sup_formats=AUDIO_FORMAT_PCM_16_BIT" */ +#define AUDIO_PARAMETER_STREAM_SUP_FORMATS "sup_formats" +/* Query supported channel masks. The response is a '|' separated list of strings from + * audio_channel_mask_t enum e.g: "sup_channels=AUDIO_CHANNEL_OUT_STEREO|AUDIO_CHANNEL_OUT_MONO" */ +#define AUDIO_PARAMETER_STREAM_SUP_CHANNELS "sup_channels" +/* Query supported sampling rates. The response is a '|' separated list of integer values e.g: + * "sup_sampling_rates=44100|48000" */ +#define AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES "sup_sampling_rates" + +/** + * audio codec parameters + */ + +#define AUDIO_OFFLOAD_CODEC_PARAMS "music_offload_codec_param" +#define AUDIO_OFFLOAD_CODEC_BIT_PER_SAMPLE "music_offload_bit_per_sample" +#define AUDIO_OFFLOAD_CODEC_BIT_RATE "music_offload_bit_rate" +#define AUDIO_OFFLOAD_CODEC_AVG_BIT_RATE "music_offload_avg_bit_rate" +#define AUDIO_OFFLOAD_CODEC_ID "music_offload_codec_id" +#define AUDIO_OFFLOAD_CODEC_BLOCK_ALIGN "music_offload_block_align" +#define AUDIO_OFFLOAD_CODEC_SAMPLE_RATE "music_offload_sample_rate" +#define AUDIO_OFFLOAD_CODEC_ENCODE_OPTION "music_offload_encode_option" +#define AUDIO_OFFLOAD_CODEC_NUM_CHANNEL "music_offload_num_channels" +#define AUDIO_OFFLOAD_CODEC_DOWN_SAMPLING "music_offload_down_sampling" +#define AUDIO_OFFLOAD_CODEC_DELAY_SAMPLES "delay_samples" +#define AUDIO_OFFLOAD_CODEC_PADDING_SAMPLES "padding_samples" + +/**************************************/ + +/* common audio stream configuration parameters + * You should memset() the entire structure to zero before use to + * ensure forward compatibility + */ +struct audio_config { + uint32_t sample_rate; + audio_channel_mask_t channel_mask; + audio_format_t format; + audio_offload_info_t offload_info; +}; +typedef struct audio_config audio_config_t; + +/* common audio stream parameters and operations */ +struct audio_stream { + + /** + * Return the sampling rate in Hz - eg. 44100. + */ + uint32_t (*get_sample_rate)(const struct audio_stream *stream); + + /* currently unused - use set_parameters with key + * AUDIO_PARAMETER_STREAM_SAMPLING_RATE + */ + int (*set_sample_rate)(struct audio_stream *stream, uint32_t rate); + + /** + * Return size of input/output buffer in bytes for this stream - eg. 4800. + * It should be a multiple of the frame size. See also get_input_buffer_size. + */ + size_t (*get_buffer_size)(const struct audio_stream *stream); + + /** + * Return the channel mask - + * e.g. AUDIO_CHANNEL_OUT_STEREO or AUDIO_CHANNEL_IN_STEREO + */ + audio_channel_mask_t (*get_channels)(const struct audio_stream *stream); + + /** + * Return the audio format - e.g. AUDIO_FORMAT_PCM_16_BIT + */ + audio_format_t (*get_format)(const struct audio_stream *stream); + + /* currently unused - use set_parameters with key + * AUDIO_PARAMETER_STREAM_FORMAT + */ + int (*set_format)(struct audio_stream *stream, audio_format_t format); + + /** + * Put the audio hardware input/output into standby mode. + * Driver should exit from standby mode at the next I/O operation. + * Returns 0 on success and <0 on failure. + */ + int (*standby)(struct audio_stream *stream); + + /** dump the state of the audio input/output device */ + int (*dump)(const struct audio_stream *stream, int fd); + + /** Return the set of device(s) which this stream is connected to */ + audio_devices_t (*get_device)(const struct audio_stream *stream); + + /** + * Currently unused - set_device() corresponds to set_parameters() with key + * AUDIO_PARAMETER_STREAM_ROUTING for both input and output. + * AUDIO_PARAMETER_STREAM_INPUT_SOURCE is an additional information used by + * input streams only. + */ + int (*set_device)(struct audio_stream *stream, audio_devices_t device); + + /** + * set/get audio stream parameters. The function accepts a list of + * parameter key value pairs in the form: key1=value1;key2=value2;... + * + * Some keys are reserved for standard parameters (See AudioParameter class) + * + * If the implementation does not accept a parameter change while + * the output is active but the parameter is acceptable otherwise, it must + * return -ENOSYS. + * + * The audio flinger will put the stream in standby and then change the + * parameter value. + */ + int (*set_parameters)(struct audio_stream *stream, const char *kv_pairs); + + /* + * Returns a pointer to a heap allocated string. The caller is responsible + * for freeing the memory for it using free(). + */ + char * (*get_parameters)(const struct audio_stream *stream, + const char *keys); + int (*add_audio_effect)(const struct audio_stream *stream, + effect_handle_t effect); + int (*remove_audio_effect)(const struct audio_stream *stream, + effect_handle_t effect); +}; +typedef struct audio_stream audio_stream_t; + +/* type of asynchronous write callback events. Mutually exclusive */ +typedef enum { + STREAM_CBK_EVENT_WRITE_READY, /* non blocking write completed */ + STREAM_CBK_EVENT_DRAIN_READY /* drain completed */ +} stream_callback_event_t; + +typedef int (*stream_callback_t)(stream_callback_event_t event, void *param, void *cookie); + +/* type of drain requested to audio_stream_out->drain(). Mutually exclusive */ +typedef enum { + AUDIO_DRAIN_ALL, /* drain() returns when all data has been played */ + AUDIO_DRAIN_EARLY_NOTIFY /* drain() returns a short time before all data + from the current track has been played to + give time for gapless track switch */ +} audio_drain_type_t; + +/** + * audio_stream_out is the abstraction interface for the audio output hardware. + * + * It provides information about various properties of the audio output + * hardware driver. + */ + +struct audio_stream_out { + struct audio_stream common; + + /** + * Return the audio hardware driver estimated latency in milliseconds. + */ + uint32_t (*get_latency)(const struct audio_stream_out *stream); + + /** + * Use this method in situations where audio mixing is done in the + * hardware. This method serves as a direct interface with hardware, + * allowing you to directly set the volume as apposed to via the framework. + * This method might produce multiple PCM outputs or hardware accelerated + * codecs, such as MP3 or AAC. + */ + int (*set_volume)(struct audio_stream_out *stream, float left, float right); + + /** + * Write audio buffer to driver. Returns number of bytes written, or a + * negative status_t. If at least one frame was written successfully prior to the error, + * it is suggested that the driver return that successful (short) byte count + * and then return an error in the subsequent call. + * + * If set_callback() has previously been called to enable non-blocking mode + * the write() is not allowed to block. It must write only the number of + * bytes that currently fit in the driver/hardware buffer and then return + * this byte count. If this is less than the requested write size the + * callback function must be called when more space is available in the + * driver/hardware buffer. + */ + ssize_t (*write)(struct audio_stream_out *stream, const void* buffer, + size_t bytes); + + /* return the number of audio frames written by the audio dsp to DAC since + * the output has exited standby + */ + int (*get_render_position)(const struct audio_stream_out *stream, + uint32_t *dsp_frames); + + /** + * get the local time at which the next write to the audio driver will be presented. + * The units are microseconds, where the epoch is decided by the local audio HAL. + */ + int (*get_next_write_timestamp)(const struct audio_stream_out *stream, + int64_t *timestamp); + + /** + * set the callback function for notifying completion of non-blocking + * write and drain. + * Calling this function implies that all future write() and drain() + * must be non-blocking and use the callback to signal completion. + */ + int (*set_callback)(struct audio_stream_out *stream, + stream_callback_t callback, void *cookie); + + /** + * Notifies to the audio driver to stop playback however the queued buffers are + * retained by the hardware. Useful for implementing pause/resume. Empty implementation + * if not supported however should be implemented for hardware with non-trivial + * latency. In the pause state audio hardware could still be using power. User may + * consider calling suspend after a timeout. + * + * Implementation of this function is mandatory for offloaded playback. + */ + int (*pause)(struct audio_stream_out* stream); + + /** + * Notifies to the audio driver to resume playback following a pause. + * Returns error if called without matching pause. + * + * Implementation of this function is mandatory for offloaded playback. + */ + int (*resume)(struct audio_stream_out* stream); + + /** + * Requests notification when data buffered by the driver/hardware has + * been played. If set_callback() has previously been called to enable + * non-blocking mode, the drain() must not block, instead it should return + * quickly and completion of the drain is notified through the callback. + * If set_callback() has not been called, the drain() must block until + * completion. + * If type==AUDIO_DRAIN_ALL, the drain completes when all previously written + * data has been played. + * If type==AUDIO_DRAIN_EARLY_NOTIFY, the drain completes shortly before all + * data for the current track has played to allow time for the framework + * to perform a gapless track switch. + * + * Drain must return immediately on stop() and flush() call + * + * Implementation of this function is mandatory for offloaded playback. + */ + int (*drain)(struct audio_stream_out* stream, audio_drain_type_t type ); + + /** + * Notifies to the audio driver to flush the queued data. Stream must already + * be paused before calling flush(). + * + * Implementation of this function is mandatory for offloaded playback. + */ + int (*flush)(struct audio_stream_out* stream); + + /** + * Return a recent count of the number of audio frames presented to an external observer. + * This excludes frames which have been written but are still in the pipeline. + * The count is not reset to zero when output enters standby. + * Also returns the value of CLOCK_MONOTONIC as of this presentation count. + * The returned count is expected to be 'recent', + * but does not need to be the most recent possible value. + * However, the associated time should correspond to whatever count is returned. + * Example: assume that N+M frames have been presented, where M is a 'small' number. + * Then it is permissible to return N instead of N+M, + * and the timestamp should correspond to N rather than N+M. + * The terms 'recent' and 'small' are not defined. + * They reflect the quality of the implementation. + * + * 3.0 and higher only. + */ + int (*get_presentation_position)(const struct audio_stream_out *stream, + uint64_t *frames, struct timespec *timestamp); + +}; +typedef struct audio_stream_out audio_stream_out_t; + +struct audio_stream_in { + struct audio_stream common; + + /** set the input gain for the audio driver. This method is for + * for future use */ + int (*set_gain)(struct audio_stream_in *stream, float gain); + + /** Read audio buffer in from audio driver. Returns number of bytes read, or a + * negative status_t. If at least one frame was read prior to the error, + * read should return that byte count and then return an error in the subsequent call. + */ + ssize_t (*read)(struct audio_stream_in *stream, void* buffer, + size_t bytes); + + /** + * Return the amount of input frames lost in the audio driver since the + * last call of this function. + * Audio driver is expected to reset the value to 0 and restart counting + * upon returning the current value by this function call. + * Such loss typically occurs when the user space process is blocked + * longer than the capacity of audio driver buffers. + * + * Unit: the number of input audio frames + */ + uint32_t (*get_input_frames_lost)(struct audio_stream_in *stream); +}; +typedef struct audio_stream_in audio_stream_in_t; + +/** + * return the frame size (number of bytes per sample). + */ +static inline size_t audio_stream_frame_size(const struct audio_stream *s) +{ + size_t chan_samp_sz; + audio_format_t format = s->get_format(s); + + if (audio_is_linear_pcm(format)) { + chan_samp_sz = audio_bytes_per_sample(format); + return popcount(s->get_channels(s)) * chan_samp_sz; + } + + return sizeof(int8_t); +} + + +/**********************************************************************/ + +/** + * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM + * and the fields of this data structure must begin with hw_module_t + * followed by module specific information. + */ +struct audio_module { + struct hw_module_t common; +}; + +struct audio_hw_device { + struct hw_device_t common; + + /** + * used by audio flinger to enumerate what devices are supported by + * each audio_hw_device implementation. + * + * Return value is a bitmask of 1 or more values of audio_devices_t + * + * NOTE: audio HAL implementations starting with + * AUDIO_DEVICE_API_VERSION_2_0 do not implement this function. + * All supported devices should be listed in audio_policy.conf + * file and the audio policy manager must choose the appropriate + * audio module based on information in this file. + */ + uint32_t (*get_supported_devices)(const struct audio_hw_device *dev); + + /** + * check to see if the audio hardware interface has been initialized. + * returns 0 on success, -ENODEV on failure. + */ + int (*init_check)(const struct audio_hw_device *dev); + + /** set the audio volume of a voice call. Range is between 0.0 and 1.0 */ + int (*set_voice_volume)(struct audio_hw_device *dev, float volume); + + /** + * set the audio volume for all audio activities other than voice call. + * Range between 0.0 and 1.0. If any value other than 0 is returned, + * the software mixer will emulate this capability. + */ + int (*set_master_volume)(struct audio_hw_device *dev, float volume); + + /** + * Get the current master volume value for the HAL, if the HAL supports + * master volume control. AudioFlinger will query this value from the + * primary audio HAL when the service starts and use the value for setting + * the initial master volume across all HALs. HALs which do not support + * this method may leave it set to NULL. + */ + int (*get_master_volume)(struct audio_hw_device *dev, float *volume); + + /** + * set_mode is called when the audio mode changes. AUDIO_MODE_NORMAL mode + * is for standard audio playback, AUDIO_MODE_RINGTONE when a ringtone is + * playing, and AUDIO_MODE_IN_CALL when a call is in progress. + */ + int (*set_mode)(struct audio_hw_device *dev, audio_mode_t mode); + + /* mic mute */ + int (*set_mic_mute)(struct audio_hw_device *dev, bool state); + int (*get_mic_mute)(const struct audio_hw_device *dev, bool *state); + + /* set/get global audio parameters */ + int (*set_parameters)(struct audio_hw_device *dev, const char *kv_pairs); + + /* + * Returns a pointer to a heap allocated string. The caller is responsible + * for freeing the memory for it using free(). + */ + char * (*get_parameters)(const struct audio_hw_device *dev, + const char *keys); + + /* Returns audio input buffer size according to parameters passed or + * 0 if one of the parameters is not supported. + * See also get_buffer_size which is for a particular stream. + */ + size_t (*get_input_buffer_size)(const struct audio_hw_device *dev, + const struct audio_config *config); + + /** This method creates and opens the audio hardware output stream */ + int (*open_output_stream)(struct audio_hw_device *dev, + audio_io_handle_t handle, + audio_devices_t devices, + audio_output_flags_t flags, + struct audio_config *config, + struct audio_stream_out **stream_out); + + void (*close_output_stream)(struct audio_hw_device *dev, + struct audio_stream_out* stream_out); + + /** This method creates and opens the audio hardware input stream */ + int (*open_input_stream)(struct audio_hw_device *dev, + audio_io_handle_t handle, + audio_devices_t devices, + struct audio_config *config, + struct audio_stream_in **stream_in); + + void (*close_input_stream)(struct audio_hw_device *dev, + struct audio_stream_in *stream_in); + + /** This method dumps the state of the audio hardware */ + int (*dump)(const struct audio_hw_device *dev, int fd); + + /** + * set the audio mute status for all audio activities. If any value other + * than 0 is returned, the software mixer will emulate this capability. + */ + int (*set_master_mute)(struct audio_hw_device *dev, bool mute); + + /** + * Get the current master mute status for the HAL, if the HAL supports + * master mute control. AudioFlinger will query this value from the primary + * audio HAL when the service starts and use the value for setting the + * initial master mute across all HALs. HALs which do not support this + * method may leave it set to NULL. + */ + int (*get_master_mute)(struct audio_hw_device *dev, bool *mute); +}; +typedef struct audio_hw_device audio_hw_device_t; + +/** convenience API for opening and closing a supported device */ + +static inline int audio_hw_device_open(const struct hw_module_t* module, + struct audio_hw_device** device) +{ + return module->methods->open(module, AUDIO_HARDWARE_INTERFACE, + (struct hw_device_t**)device); +} + +static inline int audio_hw_device_close(struct audio_hw_device* device) +{ + return device->common.close(&device->common); +} + + +__END_DECLS + +#endif // ANDROID_AUDIO_INTERFACE_H diff --git a/android/hardware/audio_effect.h b/android/hardware/audio_effect.h new file mode 100644 index 000000000..857a30087 --- /dev/null +++ b/android/hardware/audio_effect.h @@ -0,0 +1,1009 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +#ifndef ANDROID_AUDIO_EFFECT_H +#define ANDROID_AUDIO_EFFECT_H + +#include <errno.h> +#include <stdint.h> +#include <strings.h> +#include <sys/cdefs.h> +#include <sys/types.h> + +#include <system/audio.h> + +__BEGIN_DECLS + + +///////////////////////////////////////////////// +// Common Definitions +///////////////////////////////////////////////// + +// +//--- Effect descriptor structure effect_descriptor_t +// + +// Unique effect ID (can be generated from the following site: +// http://www.itu.int/ITU-T/asn1/uuid.html) +// This format is used for both "type" and "uuid" fields of the effect descriptor structure. +// - When used for effect type and the engine is implementing and effect corresponding to a standard +// OpenSL ES interface, this ID must be the one defined in OpenSLES_IID.h for that interface. +// - When used as uuid, it should be a unique UUID for this particular implementation. +typedef struct effect_uuid_s { + uint32_t timeLow; + uint16_t timeMid; + uint16_t timeHiAndVersion; + uint16_t clockSeq; + uint8_t node[6]; +} effect_uuid_t; + +// Maximum length of character strings in structures defines by this API. +#define EFFECT_STRING_LEN_MAX 64 + +// NULL UUID definition (matches SL_IID_NULL_) +#define EFFECT_UUID_INITIALIZER { 0xec7178ec, 0xe5e1, 0x4432, 0xa3f4, \ + { 0x46, 0x57, 0xe6, 0x79, 0x52, 0x10 } } +static const effect_uuid_t EFFECT_UUID_NULL_ = EFFECT_UUID_INITIALIZER; +static const effect_uuid_t * const EFFECT_UUID_NULL = &EFFECT_UUID_NULL_; +static const char * const EFFECT_UUID_NULL_STR = "ec7178ec-e5e1-4432-a3f4-4657e6795210"; + + +// The effect descriptor contains necessary information to facilitate the enumeration of the effect +// engines present in a library. +typedef struct effect_descriptor_s { + effect_uuid_t type; // UUID of to the OpenSL ES interface implemented by this effect + effect_uuid_t uuid; // UUID for this particular implementation + uint32_t apiVersion; // Version of the effect control API implemented + uint32_t flags; // effect engine capabilities/requirements flags (see below) + uint16_t cpuLoad; // CPU load indication (see below) + uint16_t memoryUsage; // Data Memory usage (see below) + char name[EFFECT_STRING_LEN_MAX]; // human readable effect name + char implementor[EFFECT_STRING_LEN_MAX]; // human readable effect implementor name +} effect_descriptor_t; + +// CPU load and memory usage indication: each effect implementation must provide an indication of +// its CPU and memory usage for the audio effect framework to limit the number of effects +// instantiated at a given time on a given platform. +// The CPU load is expressed in 0.1 MIPS units as estimated on an ARM9E core (ARMv5TE) with 0 WS. +// The memory usage is expressed in KB and includes only dynamically allocated memory + +// Definitions for flags field of effect descriptor. +// +---------------------------+-----------+----------------------------------- +// | description | bits | values +// +---------------------------+-----------+----------------------------------- +// | connection mode | 0..2 | 0 insert: after track process +// | | | 1 auxiliary: connect to track auxiliary +// | | | output and use send level +// | | | 2 replace: replaces track process function; +// | | | must implement SRC, volume and mono to stereo. +// | | | 3 pre processing: applied below audio HAL on input +// | | | 4 post processing: applied below audio HAL on output +// | | | 5 - 7 reserved +// +---------------------------+-----------+----------------------------------- +// | insertion preference | 3..5 | 0 none +// | | | 1 first of the chain +// | | | 2 last of the chain +// | | | 3 exclusive (only effect in the insert chain) +// | | | 4..7 reserved +// +---------------------------+-----------+----------------------------------- +// | Volume management | 6..8 | 0 none +// | | | 1 implements volume control +// | | | 2 requires volume indication +// | | | 4 reserved +// +---------------------------+-----------+----------------------------------- +// | Device indication | 9..11 | 0 none +// | | | 1 requires device updates +// | | | 2, 4 reserved +// +---------------------------+-----------+----------------------------------- +// | Sample input mode | 12..13 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG +// | | | command must specify a buffer descriptor +// | | | 2 provider: process() function uses the +// | | | bufferProvider indicated by the +// | | | EFFECT_CMD_SET_CONFIG command to request input. +// | | | buffers. +// | | | 3 both: both input modes are supported +// +---------------------------+-----------+----------------------------------- +// | Sample output mode | 14..15 | 1 direct: process() function or EFFECT_CMD_SET_CONFIG +// | | | command must specify a buffer descriptor +// | | | 2 provider: process() function uses the +// | | | bufferProvider indicated by the +// | | | EFFECT_CMD_SET_CONFIG command to request output +// | | | buffers. +// | | | 3 both: both output modes are supported +// +---------------------------+-----------+----------------------------------- +// | Hardware acceleration | 16..17 | 0 No hardware acceleration +// | | | 1 non tunneled hw acceleration: the process() function +// | | | reads the samples, send them to HW accelerated +// | | | effect processor, reads back the processed samples +// | | | and returns them to the output buffer. +// | | | 2 tunneled hw acceleration: the process() function is +// | | | transparent. The effect interface is only used to +// | | | control the effect engine. This mode is relevant for +// | | | global effects actually applied by the audio +// | | | hardware on the output stream. +// +---------------------------+-----------+----------------------------------- +// | Audio Mode indication | 18..19 | 0 none +// | | | 1 requires audio mode updates +// | | | 2..3 reserved +// +---------------------------+-----------+----------------------------------- +// | Audio source indication | 20..21 | 0 none +// | | | 1 requires audio source updates +// | | | 2..3 reserved +// +---------------------------+-----------+----------------------------------- +// | Effect offload supported | 22 | 0 The effect cannot be offloaded to an audio DSP +// | | | 1 The effect can be offloaded to an audio DSP +// +---------------------------+-----------+----------------------------------- + +// Insert mode +#define EFFECT_FLAG_TYPE_SHIFT 0 +#define EFFECT_FLAG_TYPE_SIZE 3 +#define EFFECT_FLAG_TYPE_MASK (((1 << EFFECT_FLAG_TYPE_SIZE) -1) \ + << EFFECT_FLAG_TYPE_SHIFT) +#define EFFECT_FLAG_TYPE_INSERT (0 << EFFECT_FLAG_TYPE_SHIFT) +#define EFFECT_FLAG_TYPE_AUXILIARY (1 << EFFECT_FLAG_TYPE_SHIFT) +#define EFFECT_FLAG_TYPE_REPLACE (2 << EFFECT_FLAG_TYPE_SHIFT) +#define EFFECT_FLAG_TYPE_PRE_PROC (3 << EFFECT_FLAG_TYPE_SHIFT) +#define EFFECT_FLAG_TYPE_POST_PROC (4 << EFFECT_FLAG_TYPE_SHIFT) + +// Insert preference +#define EFFECT_FLAG_INSERT_SHIFT (EFFECT_FLAG_TYPE_SHIFT + EFFECT_FLAG_TYPE_SIZE) +#define EFFECT_FLAG_INSERT_SIZE 3 +#define EFFECT_FLAG_INSERT_MASK (((1 << EFFECT_FLAG_INSERT_SIZE) -1) \ + << EFFECT_FLAG_INSERT_SHIFT) +#define EFFECT_FLAG_INSERT_ANY (0 << EFFECT_FLAG_INSERT_SHIFT) +#define EFFECT_FLAG_INSERT_FIRST (1 << EFFECT_FLAG_INSERT_SHIFT) +#define EFFECT_FLAG_INSERT_LAST (2 << EFFECT_FLAG_INSERT_SHIFT) +#define EFFECT_FLAG_INSERT_EXCLUSIVE (3 << EFFECT_FLAG_INSERT_SHIFT) + + +// Volume control +#define EFFECT_FLAG_VOLUME_SHIFT (EFFECT_FLAG_INSERT_SHIFT + EFFECT_FLAG_INSERT_SIZE) +#define EFFECT_FLAG_VOLUME_SIZE 3 +#define EFFECT_FLAG_VOLUME_MASK (((1 << EFFECT_FLAG_VOLUME_SIZE) -1) \ + << EFFECT_FLAG_VOLUME_SHIFT) +#define EFFECT_FLAG_VOLUME_CTRL (1 << EFFECT_FLAG_VOLUME_SHIFT) +#define EFFECT_FLAG_VOLUME_IND (2 << EFFECT_FLAG_VOLUME_SHIFT) +#define EFFECT_FLAG_VOLUME_NONE (0 << EFFECT_FLAG_VOLUME_SHIFT) + +// Device indication +#define EFFECT_FLAG_DEVICE_SHIFT (EFFECT_FLAG_VOLUME_SHIFT + EFFECT_FLAG_VOLUME_SIZE) +#define EFFECT_FLAG_DEVICE_SIZE 3 +#define EFFECT_FLAG_DEVICE_MASK (((1 << EFFECT_FLAG_DEVICE_SIZE) -1) \ + << EFFECT_FLAG_DEVICE_SHIFT) +#define EFFECT_FLAG_DEVICE_IND (1 << EFFECT_FLAG_DEVICE_SHIFT) +#define EFFECT_FLAG_DEVICE_NONE (0 << EFFECT_FLAG_DEVICE_SHIFT) + +// Sample input modes +#define EFFECT_FLAG_INPUT_SHIFT (EFFECT_FLAG_DEVICE_SHIFT + EFFECT_FLAG_DEVICE_SIZE) +#define EFFECT_FLAG_INPUT_SIZE 2 +#define EFFECT_FLAG_INPUT_MASK (((1 << EFFECT_FLAG_INPUT_SIZE) -1) \ + << EFFECT_FLAG_INPUT_SHIFT) +#define EFFECT_FLAG_INPUT_DIRECT (1 << EFFECT_FLAG_INPUT_SHIFT) +#define EFFECT_FLAG_INPUT_PROVIDER (2 << EFFECT_FLAG_INPUT_SHIFT) +#define EFFECT_FLAG_INPUT_BOTH (3 << EFFECT_FLAG_INPUT_SHIFT) + +// Sample output modes +#define EFFECT_FLAG_OUTPUT_SHIFT (EFFECT_FLAG_INPUT_SHIFT + EFFECT_FLAG_INPUT_SIZE) +#define EFFECT_FLAG_OUTPUT_SIZE 2 +#define EFFECT_FLAG_OUTPUT_MASK (((1 << EFFECT_FLAG_OUTPUT_SIZE) -1) \ + << EFFECT_FLAG_OUTPUT_SHIFT) +#define EFFECT_FLAG_OUTPUT_DIRECT (1 << EFFECT_FLAG_OUTPUT_SHIFT) +#define EFFECT_FLAG_OUTPUT_PROVIDER (2 << EFFECT_FLAG_OUTPUT_SHIFT) +#define EFFECT_FLAG_OUTPUT_BOTH (3 << EFFECT_FLAG_OUTPUT_SHIFT) + +// Hardware acceleration mode +#define EFFECT_FLAG_HW_ACC_SHIFT (EFFECT_FLAG_OUTPUT_SHIFT + EFFECT_FLAG_OUTPUT_SIZE) +#define EFFECT_FLAG_HW_ACC_SIZE 2 +#define EFFECT_FLAG_HW_ACC_MASK (((1 << EFFECT_FLAG_HW_ACC_SIZE) -1) \ + << EFFECT_FLAG_HW_ACC_SHIFT) +#define EFFECT_FLAG_HW_ACC_SIMPLE (1 << EFFECT_FLAG_HW_ACC_SHIFT) +#define EFFECT_FLAG_HW_ACC_TUNNEL (2 << EFFECT_FLAG_HW_ACC_SHIFT) + +// Audio mode indication +#define EFFECT_FLAG_AUDIO_MODE_SHIFT (EFFECT_FLAG_HW_ACC_SHIFT + EFFECT_FLAG_HW_ACC_SIZE) +#define EFFECT_FLAG_AUDIO_MODE_SIZE 2 +#define EFFECT_FLAG_AUDIO_MODE_MASK (((1 << EFFECT_FLAG_AUDIO_MODE_SIZE) -1) \ + << EFFECT_FLAG_AUDIO_MODE_SHIFT) +#define EFFECT_FLAG_AUDIO_MODE_IND (1 << EFFECT_FLAG_AUDIO_MODE_SHIFT) +#define EFFECT_FLAG_AUDIO_MODE_NONE (0 << EFFECT_FLAG_AUDIO_MODE_SHIFT) + +// Audio source indication +#define EFFECT_FLAG_AUDIO_SOURCE_SHIFT (EFFECT_FLAG_AUDIO_MODE_SHIFT + EFFECT_FLAG_AUDIO_MODE_SIZE) +#define EFFECT_FLAG_AUDIO_SOURCE_SIZE 2 +#define EFFECT_FLAG_AUDIO_SOURCE_MASK (((1 << EFFECT_FLAG_AUDIO_SOURCE_SIZE) -1) \ + << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) +#define EFFECT_FLAG_AUDIO_SOURCE_IND (1 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) +#define EFFECT_FLAG_AUDIO_SOURCE_NONE (0 << EFFECT_FLAG_AUDIO_SOURCE_SHIFT) + +// Effect offload indication +#define EFFECT_FLAG_OFFLOAD_SHIFT (EFFECT_FLAG_AUDIO_SOURCE_SHIFT + \ + EFFECT_FLAG_AUDIO_SOURCE_SIZE) +#define EFFECT_FLAG_OFFLOAD_SIZE 1 +#define EFFECT_FLAG_OFFLOAD_MASK (((1 << EFFECT_FLAG_OFFLOAD_SIZE) -1) \ + << EFFECT_FLAG_OFFLOAD_SHIFT) +#define EFFECT_FLAG_OFFLOAD_SUPPORTED (1 << EFFECT_FLAG_OFFLOAD_SHIFT) + +#define EFFECT_MAKE_API_VERSION(M, m) (((M)<<16) | ((m) & 0xFFFF)) +#define EFFECT_API_VERSION_MAJOR(v) ((v)>>16) +#define EFFECT_API_VERSION_MINOR(v) ((m) & 0xFFFF) + + + +///////////////////////////////////////////////// +// Effect control interface +///////////////////////////////////////////////// + +// Effect control interface version 2.0 +#define EFFECT_CONTROL_API_VERSION EFFECT_MAKE_API_VERSION(2,0) + +// Effect control interface structure: effect_interface_s +// The effect control interface is exposed by each effect engine implementation. It consists of +// a set of functions controlling the configuration, activation and process of the engine. +// The functions are grouped in a structure of type effect_interface_s. +// +// Effect control interface handle: effect_handle_t +// The effect_handle_t serves two purposes regarding the implementation of the effect engine: +// - 1 it is the address of a pointer to an effect_interface_s structure where the functions +// of the effect control API for a particular effect are located. +// - 2 it is the address of the context of a particular effect instance. +// A typical implementation in the effect library would define a structure as follows: +// struct effect_module_s { +// const struct effect_interface_s *itfe; +// effect_config_t config; +// effect_context_t context; +// } +// The implementation of EffectCreate() function would then allocate a structure of this +// type and return its address as effect_handle_t +typedef struct effect_interface_s **effect_handle_t; + + +// Forward definition of type audio_buffer_t +typedef struct audio_buffer_s audio_buffer_t; + + + + + + +// Effect control interface definition +struct effect_interface_s { + //////////////////////////////////////////////////////////////////////////////// + // + // Function: process + // + // Description: Effect process function. Takes input samples as specified + // (count and location) in input buffer descriptor and output processed + // samples as specified in output buffer descriptor. If the buffer descriptor + // is not specified the function must use either the buffer or the + // buffer provider function installed by the EFFECT_CMD_SET_CONFIG command. + // The effect framework will call the process() function after the EFFECT_CMD_ENABLE + // command is received and until the EFFECT_CMD_DISABLE is received. When the engine + // receives the EFFECT_CMD_DISABLE command it should turn off the effect gracefully + // and when done indicate that it is OK to stop calling the process() function by + // returning the -ENODATA status. + // + // NOTE: the process() function implementation should be "real-time safe" that is + // it should not perform blocking calls: malloc/free, sleep, read/write/open/close, + // pthread_cond_wait/pthread_mutex_lock... + // + // Input: + // self: handle to the effect interface this function + // is called on. + // inBuffer: buffer descriptor indicating where to read samples to process. + // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. + // + // outBuffer: buffer descriptor indicating where to write processed samples. + // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG command. + // + // Output: + // returned value: 0 successful operation + // -ENODATA the engine has finished the disable phase and the framework + // can stop calling process() + // -EINVAL invalid interface handle or + // invalid input/output buffer description + //////////////////////////////////////////////////////////////////////////////// + int32_t (*process)(effect_handle_t self, + audio_buffer_t *inBuffer, + audio_buffer_t *outBuffer); + //////////////////////////////////////////////////////////////////////////////// + // + // Function: command + // + // Description: Send a command and receive a response to/from effect engine. + // + // Input: + // self: handle to the effect interface this function + // is called on. + // cmdCode: command code: the command can be a standardized command defined in + // effect_command_e (see below) or a proprietary command. + // cmdSize: size of command in bytes + // pCmdData: pointer to command data + // pReplyData: pointer to reply data + // + // Input/Output: + // replySize: maximum size of reply data as input + // actual size of reply data as output + // + // Output: + // returned value: 0 successful operation + // -EINVAL invalid interface handle or + // invalid command/reply size or format according to command code + // The return code should be restricted to indicate problems related to the this + // API specification. Status related to the execution of a particular command should be + // indicated as part of the reply field. + // + // *pReplyData updated with command response + // + //////////////////////////////////////////////////////////////////////////////// + int32_t (*command)(effect_handle_t self, + uint32_t cmdCode, + uint32_t cmdSize, + void *pCmdData, + uint32_t *replySize, + void *pReplyData); + //////////////////////////////////////////////////////////////////////////////// + // + // Function: get_descriptor + // + // Description: Returns the effect descriptor + // + // Input: + // self: handle to the effect interface this function + // is called on. + // + // Input/Output: + // pDescriptor: address where to return the effect descriptor. + // + // Output: + // returned value: 0 successful operation. + // -EINVAL invalid interface handle or invalid pDescriptor + // *pDescriptor: updated with the effect descriptor. + // + //////////////////////////////////////////////////////////////////////////////// + int32_t (*get_descriptor)(effect_handle_t self, + effect_descriptor_t *pDescriptor); + //////////////////////////////////////////////////////////////////////////////// + // + // Function: process_reverse + // + // Description: Process reverse stream function. This function is used to pass + // a reference stream to the effect engine. If the engine does not need a reference + // stream, this function pointer can be set to NULL. + // This function would typically implemented by an Echo Canceler. + // + // Input: + // self: handle to the effect interface this function + // is called on. + // inBuffer: buffer descriptor indicating where to read samples to process. + // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. + // + // outBuffer: buffer descriptor indicating where to write processed samples. + // If NULL, use the configuration passed by EFFECT_CMD_SET_CONFIG_REVERSE command. + // If the buffer and buffer provider in the configuration received by + // EFFECT_CMD_SET_CONFIG_REVERSE are also NULL, do not return modified reverse + // stream data + // + // Output: + // returned value: 0 successful operation + // -ENODATA the engine has finished the disable phase and the framework + // can stop calling process_reverse() + // -EINVAL invalid interface handle or + // invalid input/output buffer description + //////////////////////////////////////////////////////////////////////////////// + int32_t (*process_reverse)(effect_handle_t self, + audio_buffer_t *inBuffer, + audio_buffer_t *outBuffer); +}; + + +// +//--- Standardized command codes for command() function +// +enum effect_command_e { + EFFECT_CMD_INIT, // initialize effect engine + EFFECT_CMD_SET_CONFIG, // configure effect engine (see effect_config_t) + EFFECT_CMD_RESET, // reset effect engine + EFFECT_CMD_ENABLE, // enable effect process + EFFECT_CMD_DISABLE, // disable effect process + EFFECT_CMD_SET_PARAM, // set parameter immediately (see effect_param_t) + EFFECT_CMD_SET_PARAM_DEFERRED, // set parameter deferred + EFFECT_CMD_SET_PARAM_COMMIT, // commit previous set parameter deferred + EFFECT_CMD_GET_PARAM, // get parameter + EFFECT_CMD_SET_DEVICE, // set audio device (see audio.h, audio_devices_t) + EFFECT_CMD_SET_VOLUME, // set volume + EFFECT_CMD_SET_AUDIO_MODE, // set the audio mode (normal, ring, ...) + EFFECT_CMD_SET_CONFIG_REVERSE, // configure effect engine reverse stream(see effect_config_t) + EFFECT_CMD_SET_INPUT_DEVICE, // set capture device (see audio.h, audio_devices_t) + EFFECT_CMD_GET_CONFIG, // read effect engine configuration + EFFECT_CMD_GET_CONFIG_REVERSE, // read configure effect engine reverse stream configuration + EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS,// get all supported configurations for a feature. + EFFECT_CMD_GET_FEATURE_CONFIG, // get current feature configuration + EFFECT_CMD_SET_FEATURE_CONFIG, // set current feature configuration + EFFECT_CMD_SET_AUDIO_SOURCE, // set the audio source (see audio.h, audio_source_t) + EFFECT_CMD_OFFLOAD, // set if effect thread is an offload one, + // send the ioHandle of the effect thread + EFFECT_CMD_FIRST_PROPRIETARY = 0x10000 // first proprietary command code +}; + +//================================================================================================== +// command: EFFECT_CMD_INIT +//-------------------------------------------------------------------------------------------------- +// description: +// Initialize effect engine: All configurations return to default +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_SET_CONFIG +//-------------------------------------------------------------------------------------------------- +// description: +// Apply new audio parameters configurations for input and output buffers +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_config_t) +// data: effect_config_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_RESET +//-------------------------------------------------------------------------------------------------- +// description: +// Reset the effect engine. Keep configuration but resets state and buffer content +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_ENABLE +//-------------------------------------------------------------------------------------------------- +// description: +// Enable the process. Called by the framework before the first call to process() +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_DISABLE +//-------------------------------------------------------------------------------------------------- +// description: +// Disable the process. Called by the framework after the last call to process() +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_SET_PARAM +//-------------------------------------------------------------------------------------------------- +// description: +// Set a parameter and apply it immediately +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_param_t) + size of param and value +// data: effect_param_t + param + value. See effect_param_t definition below for value offset +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_SET_PARAM_DEFERRED +//-------------------------------------------------------------------------------------------------- +// description: +// Set a parameter but apply it only when receiving EFFECT_CMD_SET_PARAM_COMMIT command +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_param_t) + size of param and value +// data: effect_param_t + param + value. See effect_param_t definition below for value offset +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_SET_PARAM_COMMIT +//-------------------------------------------------------------------------------------------------- +// description: +// Apply all previously received EFFECT_CMD_SET_PARAM_DEFERRED commands +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_GET_PARAM +//-------------------------------------------------------------------------------------------------- +// description: +// Get a parameter value +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_param_t) + size of param +// data: effect_param_t + param +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(effect_param_t) + size of param and value +// data: effect_param_t + param + value. See effect_param_t definition below for value offset +//================================================================================================== +// command: EFFECT_CMD_SET_DEVICE +//-------------------------------------------------------------------------------------------------- +// description: +// Set the rendering device the audio output path is connected to. See audio.h, audio_devices_t +// for device values. +// The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this +// command when the device changes +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) +// data: uint32_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_SET_VOLUME +//-------------------------------------------------------------------------------------------------- +// description: +// Set and get volume. Used by audio framework to delegate volume control to effect engine. +// The effect implementation must set EFFECT_FLAG_VOLUME_IND or EFFECT_FLAG_VOLUME_CTRL flag in +// its descriptor to receive this command before every call to process() function +// If EFFECT_FLAG_VOLUME_CTRL flag is set in the effect descriptor, the effect engine must return +// the volume that should be applied before the effect is processed. The overall volume (the volume +// actually applied by the effect engine multiplied by the returned value) should match the value +// indicated in the command. +//-------------------------------------------------------------------------------------------------- +// command format: +// size: n * sizeof(uint32_t) +// data: volume for each channel defined in effect_config_t for output buffer expressed in +// 8.24 fixed point format +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: n * sizeof(uint32_t) / 0 +// data: - if EFFECT_FLAG_VOLUME_CTRL is set in effect descriptor: +// volume for each channel defined in effect_config_t for output buffer expressed in +// 8.24 fixed point format +// - if EFFECT_FLAG_VOLUME_CTRL is not set in effect descriptor: +// N/A +// It is legal to receive a null pointer as pReplyData in which case the effect framework has +// delegated volume control to another effect +//================================================================================================== +// command: EFFECT_CMD_SET_AUDIO_MODE +//-------------------------------------------------------------------------------------------------- +// description: +// Set the audio mode. The effect implementation must set EFFECT_FLAG_AUDIO_MODE_IND flag in its +// descriptor to receive this command when the audio mode changes. +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) +// data: audio_mode_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_SET_CONFIG_REVERSE +//-------------------------------------------------------------------------------------------------- +// description: +// Apply new audio parameters configurations for input and output buffers of reverse stream. +// An example of reverse stream is the echo reference supplied to an Acoustic Echo Canceler. +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_config_t) +// data: effect_config_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(int) +// data: status +//================================================================================================== +// command: EFFECT_CMD_SET_INPUT_DEVICE +//-------------------------------------------------------------------------------------------------- +// description: +// Set the capture device the audio input path is connected to. See audio.h, audio_devices_t +// for device values. +// The effect implementation must set EFFECT_FLAG_DEVICE_IND flag in its descriptor to receive this +// command when the device changes +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) +// data: uint32_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_GET_CONFIG +//-------------------------------------------------------------------------------------------------- +// description: +// Read audio parameters configurations for input and output buffers +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(effect_config_t) +// data: effect_config_t +//================================================================================================== +// command: EFFECT_CMD_GET_CONFIG_REVERSE +//-------------------------------------------------------------------------------------------------- +// description: +// Read audio parameters configurations for input and output buffers of reverse stream +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 0 +// data: N/A +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(effect_config_t) +// data: effect_config_t +//================================================================================================== +// command: EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS +//-------------------------------------------------------------------------------------------------- +// description: +// Queries for supported configurations for a particular feature (e.g. get the supported +// combinations of main and auxiliary channels for a noise suppressor). +// The command parameter is the feature identifier (See effect_feature_e for a list of defined +// features) followed by the maximum number of configuration descriptor to return. +// The reply is composed of: +// - status (uint32_t): +// - 0 if feature is supported +// - -ENOSYS if the feature is not supported, +// - -ENOMEM if the feature is supported but the total number of supported configurations +// exceeds the maximum number indicated by the caller. +// - total number of supported configurations (uint32_t) +// - an array of configuration descriptors. +// The actual number of descriptors returned must not exceed the maximum number indicated by +// the caller. +//-------------------------------------------------------------------------------------------------- +// command format: +// size: 2 x sizeof(uint32_t) +// data: effect_feature_e + maximum number of configurations to return +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 2 x sizeof(uint32_t) + n x sizeof (<config descriptor>) +// data: status + total number of configurations supported + array of n config descriptors +//================================================================================================== +// command: EFFECT_CMD_GET_FEATURE_CONFIG +//-------------------------------------------------------------------------------------------------- +// description: +// Retrieves current configuration for a given feature. +// The reply status is: +// - 0 if feature is supported +// - -ENOSYS if the feature is not supported, +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) +// data: effect_feature_e +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(uint32_t) + sizeof (<config descriptor>) +// data: status + config descriptor +//================================================================================================== +// command: EFFECT_CMD_SET_FEATURE_CONFIG +//-------------------------------------------------------------------------------------------------- +// description: +// Sets current configuration for a given feature. +// The reply status is: +// - 0 if feature is supported +// - -ENOSYS if the feature is not supported, +// - -EINVAL if the configuration is invalid +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) + sizeof (<config descriptor>) +// data: effect_feature_e + config descriptor +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(uint32_t) +// data: status +//================================================================================================== +// command: EFFECT_CMD_SET_AUDIO_SOURCE +//-------------------------------------------------------------------------------------------------- +// description: +// Set the audio source the capture path is configured for (Camcorder, voice recognition...). +// See audio.h, audio_source_t for values. +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(uint32_t) +// data: uint32_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: 0 +// data: N/A +//================================================================================================== +// command: EFFECT_CMD_OFFLOAD +//-------------------------------------------------------------------------------------------------- +// description: +// 1.indicate if the playback thread the effect is attached to is offloaded or not +// 2.update the io handle of the playback thread the effect is attached to +//-------------------------------------------------------------------------------------------------- +// command format: +// size: sizeof(effect_offload_param_t) +// data: effect_offload_param_t +//-------------------------------------------------------------------------------------------------- +// reply format: +// size: sizeof(uint32_t) +// data: uint32_t +//-------------------------------------------------------------------------------------------------- +// command: EFFECT_CMD_FIRST_PROPRIETARY +//-------------------------------------------------------------------------------------------------- +// description: +// All proprietary effect commands must use command codes above this value. The size and format of +// command and response fields is free in this case +//================================================================================================== + + +// Audio buffer descriptor used by process(), bufferProvider() functions and buffer_config_t +// structure. Multi-channel audio is always interleaved. The channel order is from LSB to MSB with +// regard to the channel mask definition in audio.h, audio_channel_mask_t e.g : +// Stereo: left, right +// 5 point 1: front left, front right, front center, low frequency, back left, back right +// The buffer size is expressed in frame count, a frame being composed of samples for all +// channels at a given time. Frame size for unspecified format (AUDIO_FORMAT_OTHER) is 8 bit by +// definition +struct audio_buffer_s { + size_t frameCount; // number of frames in buffer + union { + void* raw; // raw pointer to start of buffer + int32_t* s32; // pointer to signed 32 bit data at start of buffer + int16_t* s16; // pointer to signed 16 bit data at start of buffer + uint8_t* u8; // pointer to unsigned 8 bit data at start of buffer + }; +}; + +// The buffer_provider_s structure contains functions that can be used +// by the effect engine process() function to query and release input +// or output audio buffer. +// The getBuffer() function is called to retrieve a buffer where data +// should read from or written to by process() function. +// The releaseBuffer() function MUST be called when the buffer retrieved +// with getBuffer() is not needed anymore. +// The process function should use the buffer provider mechanism to retrieve +// input or output buffer if the inBuffer or outBuffer passed as argument is NULL +// and the buffer configuration (buffer_config_t) given by the EFFECT_CMD_SET_CONFIG +// command did not specify an audio buffer. + +typedef int32_t (* buffer_function_t)(void *cookie, audio_buffer_t *buffer); + +typedef struct buffer_provider_s { + buffer_function_t getBuffer; // retrieve next buffer + buffer_function_t releaseBuffer; // release used buffer + void *cookie; // for use by client of buffer provider functions +} buffer_provider_t; + + +// The buffer_config_s structure specifies the input or output audio format +// to be used by the effect engine. It is part of the effect_config_t +// structure that defines both input and output buffer configurations and is +// passed by the EFFECT_CMD_SET_CONFIG or EFFECT_CMD_SET_CONFIG_REVERSE command. +typedef struct buffer_config_s { + audio_buffer_t buffer; // buffer for use by process() function if not passed explicitly + uint32_t samplingRate; // sampling rate + uint32_t channels; // channel mask (see audio_channel_mask_t in audio.h) + buffer_provider_t bufferProvider; // buffer provider + uint8_t format; // Audio format (see see audio_format_t in audio.h) + uint8_t accessMode; // read/write or accumulate in buffer (effect_buffer_access_e) + uint16_t mask; // indicates which of the above fields is valid +} buffer_config_t; + +// Values for "accessMode" field of buffer_config_t: +// overwrite, read only, accumulate (read/modify/write) +enum effect_buffer_access_e { + EFFECT_BUFFER_ACCESS_WRITE, + EFFECT_BUFFER_ACCESS_READ, + EFFECT_BUFFER_ACCESS_ACCUMULATE + +}; + +// feature identifiers for EFFECT_CMD_GET_FEATURE_SUPPORTED_CONFIGS command +enum effect_feature_e { + EFFECT_FEATURE_AUX_CHANNELS, // supports auxiliary channels (e.g. dual mic noise suppressor) + EFFECT_FEATURE_CNT +}; + +// EFFECT_FEATURE_AUX_CHANNELS feature configuration descriptor. Describe a combination +// of main and auxiliary channels supported +typedef struct channel_config_s { + audio_channel_mask_t main_channels; // channel mask for main channels + audio_channel_mask_t aux_channels; // channel mask for auxiliary channels +} channel_config_t; + + +// Values for bit field "mask" in buffer_config_t. If a bit is set, the corresponding field +// in buffer_config_t must be taken into account when executing the EFFECT_CMD_SET_CONFIG command +#define EFFECT_CONFIG_BUFFER 0x0001 // buffer field must be taken into account +#define EFFECT_CONFIG_SMP_RATE 0x0002 // samplingRate field must be taken into account +#define EFFECT_CONFIG_CHANNELS 0x0004 // channels field must be taken into account +#define EFFECT_CONFIG_FORMAT 0x0008 // format field must be taken into account +#define EFFECT_CONFIG_ACC_MODE 0x0010 // accessMode field must be taken into account +#define EFFECT_CONFIG_PROVIDER 0x0020 // bufferProvider field must be taken into account +#define EFFECT_CONFIG_ALL (EFFECT_CONFIG_BUFFER | EFFECT_CONFIG_SMP_RATE | \ + EFFECT_CONFIG_CHANNELS | EFFECT_CONFIG_FORMAT | \ + EFFECT_CONFIG_ACC_MODE | EFFECT_CONFIG_PROVIDER) + + +// effect_config_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_CONFIG +// command to configure audio parameters and buffers for effect engine input and output. +typedef struct effect_config_s { + buffer_config_t inputCfg; + buffer_config_t outputCfg; +} effect_config_t; + + +// effect_param_s structure describes the format of the pCmdData argument of EFFECT_CMD_SET_PARAM +// command and pCmdData and pReplyData of EFFECT_CMD_GET_PARAM command. +// psize and vsize represent the actual size of parameter and value. +// +// NOTE: the start of value field inside the data field is always on a 32 bit boundary: +// +// +-----------+ +// | status | sizeof(int) +// +-----------+ +// | psize | sizeof(int) +// +-----------+ +// | vsize | sizeof(int) +// +-----------+ +// | | | | +// ~ parameter ~ > psize | +// | | | > ((psize - 1)/sizeof(int) + 1) * sizeof(int) +// +-----------+ | +// | padding | | +// +-----------+ +// | | | +// ~ value ~ > vsize +// | | | +// +-----------+ + +typedef struct effect_param_s { + int32_t status; // Transaction status (unused for command, used for reply) + uint32_t psize; // Parameter size + uint32_t vsize; // Value size + char data[]; // Start of Parameter + Value data +} effect_param_t; + +// structure used by EFFECT_CMD_OFFLOAD command +typedef struct effect_offload_param_s { + bool isOffload; // true if the playback thread the effect is attached to is offloaded + int ioHandle; // io handle of the playback thread the effect is attached to +} effect_offload_param_t; + + +///////////////////////////////////////////////// +// Effect library interface +///////////////////////////////////////////////// + +// Effect library interface version 3.0 +// Note that EffectsFactory.c only checks the major version component, so changes to the minor +// number can only be used for fully backwards compatible changes +#define EFFECT_LIBRARY_API_VERSION EFFECT_MAKE_API_VERSION(3,0) + +#define AUDIO_EFFECT_LIBRARY_TAG ((('A') << 24) | (('E') << 16) | (('L') << 8) | ('T')) + +// Every effect library must have a data structure named AUDIO_EFFECT_LIBRARY_INFO_SYM +// and the fields of this data structure must begin with audio_effect_library_t + +typedef struct audio_effect_library_s { + // tag must be initialized to AUDIO_EFFECT_LIBRARY_TAG + uint32_t tag; + // Version of the effect library API : 0xMMMMmmmm MMMM: Major, mmmm: minor + uint32_t version; + // Name of this library + const char *name; + // Author/owner/implementor of the library + const char *implementor; + + //////////////////////////////////////////////////////////////////////////////// + // + // Function: create_effect + // + // Description: Creates an effect engine of the specified implementation uuid and + // returns an effect control interface on this engine. The function will allocate the + // resources for an instance of the requested effect engine and return + // a handle on the effect control interface. + // + // Input: + // uuid: pointer to the effect uuid. + // sessionId: audio session to which this effect instance will be attached. All effects + // created with the same session ID are connected in series and process the same signal + // stream. Knowing that two effects are part of the same effect chain can help the + // library implement some kind of optimizations. + // ioId: identifies the output or input stream this effect is directed to at audio HAL. + // For future use especially with tunneled HW accelerated effects + // + // Input/Output: + // pHandle: address where to return the effect interface handle. + // + // Output: + // returned value: 0 successful operation. + // -ENODEV library failed to initialize + // -EINVAL invalid pEffectUuid or pHandle + // -ENOENT no effect with this uuid found + // *pHandle: updated with the effect interface handle. + // + //////////////////////////////////////////////////////////////////////////////// + int32_t (*create_effect)(const effect_uuid_t *uuid, + int32_t sessionId, + int32_t ioId, + effect_handle_t *pHandle); + + //////////////////////////////////////////////////////////////////////////////// + // + // Function: release_effect + // + // Description: Releases the effect engine whose handle is given as argument. + // All resources allocated to this particular instance of the effect are + // released. + // + // Input: + // handle: handle on the effect interface to be released. + // + // Output: + // returned value: 0 successful operation. + // -ENODEV library failed to initialize + // -EINVAL invalid interface handle + // + //////////////////////////////////////////////////////////////////////////////// + int32_t (*release_effect)(effect_handle_t handle); + + //////////////////////////////////////////////////////////////////////////////// + // + // Function: get_descriptor + // + // Description: Returns the descriptor of the effect engine which implementation UUID is + // given as argument. + // + // Input/Output: + // uuid: pointer to the effect uuid. + // pDescriptor: address where to return the effect descriptor. + // + // Output: + // returned value: 0 successful operation. + // -ENODEV library failed to initialize + // -EINVAL invalid pDescriptor or uuid + // *pDescriptor: updated with the effect descriptor. + // + //////////////////////////////////////////////////////////////////////////////// + int32_t (*get_descriptor)(const effect_uuid_t *uuid, + effect_descriptor_t *pDescriptor); +} audio_effect_library_t; + +// Name of the hal_module_info +#define AUDIO_EFFECT_LIBRARY_INFO_SYM AELI + +// Name of the hal_module_info as a string +#define AUDIO_EFFECT_LIBRARY_INFO_SYM_AS_STR "AELI" + +__END_DECLS + +#endif // ANDROID_AUDIO_EFFECT_H |