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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* Copyright (C) 2013 Sebastian Dröge <slomo@circular-chaos.org>
*
* gstaudiomixer.h: Header for GstAudioMixer element
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_AUDIO_MIXER_H__
#define __GST_AUDIO_MIXER_H__
#include <gst/gst.h>
#include <gst/base/gstaggregator.h>
#include <gst/audio/audio.h>
G_BEGIN_DECLS
#define GST_TYPE_AUDIO_MIXER (gst_audiomixer_get_type())
#define GST_AUDIO_MIXER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_MIXER,GstAudioMixer))
#define GST_IS_AUDIO_MIXER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_MIXER))
#define GST_AUDIO_MIXER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_MIXER,GstAudioMixerClass))
#define GST_IS_AUDIO_MIXER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_MIXER))
#define GST_AUDIO_MIXER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_MIXER,GstAudioMixerClass))
typedef struct _GstAudioMixer GstAudioMixer;
typedef struct _GstAudioMixerClass GstAudioMixerClass;
typedef struct _GstAudioMixerPad GstAudioMixerPad;
typedef struct _GstAudioMixerPadClass GstAudioMixerPadClass;
/**
* GstAudioMixer:
*
* The audiomixer object structure.
*/
struct _GstAudioMixer {
GstAggregator element;
/* the next are valid for both int and float */
GstAudioInfo info;
/* counters to keep track of timestamps */
gint64 offset;
/* Buffer starting at offset containing block_size samples */
GstBuffer *current_buffer;
/* current caps */
GstCaps *current_caps;
gboolean send_caps;
/* target caps (set via property) */
GstCaps *filter_caps;
GstClockTime alignment_threshold;
GstClockTime discont_wait;
/* Last time we noticed a discont */
GstClockTime discont_time;
gint64 base_time;
/* Size in samples that is output per buffer */
guint blocksize;
};
struct _GstAudioMixerClass {
GstAggregatorClass parent_class;
};
GType gst_audiomixer_get_type (void);
#define GST_TYPE_AUDIO_MIXER_PAD (gst_audiomixer_pad_get_type())
#define GST_AUDIO_MIXER_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_MIXER_PAD,GstAudioMixerPad))
#define GST_IS_AUDIO_MIXER_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_MIXER_PAD))
#define GST_AUDIO_MIXER_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_MIXER_PAD,GstAudioMixerPadClass))
#define GST_IS_AUDIO_MIXER_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_MIXER_PAD))
#define GST_AUDIO_MIXER_PAD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_MIXER_PAD,GstAudioMixerPadClass))
struct _GstAudioMixerPad {
GstAggregatorPad parent;
gdouble volume;
gint volume_i32;
gint volume_i16;
gint volume_i8;
gboolean mute;
/* < private > */
GstBuffer *buffer; /* current buffer we're mixing,
for comparison with collect.buffer
to see if we need to update our
cached values. */
guint position, size;
guint64 output_offset; /* Offset in output segment that
collect.pos refers to in the
current buffer. */
guint64 next_offset; /* Next expected offset in the input segment */
};
struct _GstAudioMixerPadClass {
GstAggregatorPadClass parent_class;
};
GType gst_audiomixer_pad_get_type (void);
G_END_DECLS
#endif /* __GST_AUDIO_MIXER_H__ */
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