mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 03:59:43 +00:00
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVRESAMPLE_AUDIO_MIX_H
|
|
#define AVRESAMPLE_AUDIO_MIX_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/samplefmt.h"
|
|
#include "avresample.h"
|
|
#include "audio_data.h"
|
|
|
|
typedef void (mix_func)(uint8_t **src, void **matrix, int len, int out_ch,
|
|
int in_ch);
|
|
|
|
typedef struct AudioMix {
|
|
AVAudioResampleContext *avr;
|
|
enum AVSampleFormat fmt;
|
|
enum AVMixCoeffType coeff_type;
|
|
uint64_t in_layout;
|
|
uint64_t out_layout;
|
|
int in_channels;
|
|
int out_channels;
|
|
|
|
int ptr_align;
|
|
int samples_align;
|
|
int has_optimized_func;
|
|
const char *func_descr;
|
|
const char *func_descr_generic;
|
|
mix_func *mix;
|
|
mix_func *mix_generic;
|
|
|
|
int16_t *matrix_q8[AVRESAMPLE_MAX_CHANNELS];
|
|
int32_t *matrix_q15[AVRESAMPLE_MAX_CHANNELS];
|
|
float *matrix_flt[AVRESAMPLE_MAX_CHANNELS];
|
|
void **matrix;
|
|
} AudioMix;
|
|
|
|
/**
|
|
* Set mixing function if the parameters match.
|
|
*
|
|
* This compares the parameters of the mixing function to the parameters in the
|
|
* AudioMix context. If the parameters do not match, no changes are made to the
|
|
* active functions. If the parameters do match and the alignment is not
|
|
* constrained, the function is set as the generic mixing function. If the
|
|
* parameters match and the alignment is constrained, the function is set as
|
|
* the optimized mixing function.
|
|
*
|
|
* @param am AudioMix context
|
|
* @param fmt input/output sample format
|
|
* @param coeff_type mixing coefficient type
|
|
* @param in_channels number of input channels, or 0 for any number of channels
|
|
* @param out_channels number of output channels, or 0 for any number of channels
|
|
* @param ptr_align buffer pointer alignment, in bytes
|
|
* @param samples_align buffer size alignment, in samples
|
|
* @param descr function type description (e.g. "C" or "SSE")
|
|
* @param mix_func mixing function pointer
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* Initialize the AudioMix context in the AVAudioResampleContext.
|
|
*
|
|
* The parameters in the AVAudioResampleContext are used to initialize the
|
|
* AudioMix context and set the mixing matrix.
|
|
*
|
|
* @param avr AVAudioResampleContext
|
|
* @return 0 on success, negative AVERROR code on failure
|
|
*/
|
|
int ff_audio_mix_init(AVAudioResampleContext *avr);
|
|
|
|
/**
|
|
* Close an AudioMix context.
|
|
*
|
|
* This clears and frees the mixing matrix arrays.
|
|
*/
|
|
void ff_audio_mix_close(AudioMix *am);
|
|
|
|
/**
|
|
* Apply channel mixing to audio data using the current mixing matrix.
|
|
*/
|
|
int ff_audio_mix(AudioMix *am, AudioData *src);
|
|
|
|
/* arch-specific initialization functions */
|
|
|
|
void ff_audio_mix_init_x86(AudioMix *am);
|
|
|
|
#endif /* AVRESAMPLE_AUDIO_MIX_H */
|