Libav
audio_mix.h
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1 /*
2  * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVRESAMPLE_AUDIO_MIX_H
22 #define AVRESAMPLE_AUDIO_MIX_H
23 
24 #include <stdint.h>
25 
26 #include "libavutil/samplefmt.h"
27 #include "avresample.h"
28 #include "internal.h"
29 #include "audio_data.h"
30 
31 typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch,
32  int in_ch);
33 
55  enum AVMixCoeffType coeff_type, int in_channels,
56  int out_channels, int ptr_align, int samples_align,
57  const char *descr, void *mix_func);
58 
69 
73 void ff_audio_mix_free(AudioMix **am);
74 
78 int ff_audio_mix(AudioMix *am, AudioData *src);
79 
83 int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride);
84 
88 int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride);
89 
90 /* arch-specific initialization functions */
91 
93 
94 #endif /* AVRESAMPLE_AUDIO_MIX_H */
Audio buffer used for intermediate storage between conversion phases.
Definition: oss_audio.c:47
int stride
Definition: mace.c:144
int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride)
Get the current mixing matrix.
Definition: audio_mix.c:483
uint8_t
AudioMix * ff_audio_mix_alloc(AVAudioResampleContext *avr)
Allocate and initialize an AudioMix context.
Definition: audio_mix.c:341
void ff_audio_mix_free(AudioMix **am)
Free an AudioMix context.
Definition: audio_mix.c:409
external API header
void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt, enum AVMixCoeffType coeff_type, int in_channels, int out_channels, int ptr_align, int samples_align, const char *descr, void *mix_func)
Set mixing function if the parameters match.
Definition: audio_mix.c:61
int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride)
Set the current mixing matrix.
Definition: audio_mix.c:653
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
void ff_audio_mix_init_x86(AudioMix *am)
void( mix_func)(uint8_t **src, void **matrix, int len, int out_ch, int in_ch)
Definition: audio_mix.h:31
int ff_audio_mix(AudioMix *am, AudioData *src)
Apply channel mixing to audio data using the current mixing matrix.
Definition: audio_mix.c:428
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:49
AVMixCoeffType
Mixing Coefficient Types.
Definition: avresample.h:108
int len