272 lines
10 KiB
C
272 lines
10 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
|
||
|
|
*
|
||
|
|
* This file is part of libswresample
|
||
|
|
*
|
||
|
|
* libswresample 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.
|
||
|
|
*
|
||
|
|
* libswresample 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 libswresample; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "swresample_internal.h"
|
||
|
|
#include "libavutil/audioconvert.h"
|
||
|
|
#include "libavutil/avassert.h"
|
||
|
|
|
||
|
|
#define SAMPLE float
|
||
|
|
#define RENAME(x) x ## _float
|
||
|
|
#include "rematrix_template.c"
|
||
|
|
#undef SAMPLE
|
||
|
|
#undef RENAME
|
||
|
|
|
||
|
|
#define SAMPLE int16_t
|
||
|
|
#define RENAME(x) x ## _s16
|
||
|
|
#include "rematrix_template.c"
|
||
|
|
|
||
|
|
|
||
|
|
#define FRONT_LEFT 0
|
||
|
|
#define FRONT_RIGHT 1
|
||
|
|
#define FRONT_CENTER 2
|
||
|
|
#define LOW_FREQUENCY 3
|
||
|
|
#define BACK_LEFT 4
|
||
|
|
#define BACK_RIGHT 5
|
||
|
|
#define FRONT_LEFT_OF_CENTER 6
|
||
|
|
#define FRONT_RIGHT_OF_CENTER 7
|
||
|
|
#define BACK_CENTER 8
|
||
|
|
#define SIDE_LEFT 9
|
||
|
|
#define SIDE_RIGHT 10
|
||
|
|
#define TOP_CENTER 11
|
||
|
|
#define TOP_FRONT_LEFT 12
|
||
|
|
#define TOP_FRONT_CENTER 13
|
||
|
|
#define TOP_FRONT_RIGHT 14
|
||
|
|
#define TOP_BACK_LEFT 15
|
||
|
|
#define TOP_BACK_CENTER 16
|
||
|
|
#define TOP_BACK_RIGHT 17
|
||
|
|
|
||
|
|
static int even(int64_t layout){
|
||
|
|
if(!layout) return 1;
|
||
|
|
if(layout&(layout-1)) return 1;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sane_layout(int64_t layout){
|
||
|
|
if(!(layout & AV_CH_LAYOUT_SURROUND)) // at least 1 front speaker
|
||
|
|
return 0;
|
||
|
|
if(!even(layout & (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT))) // no asymetric front
|
||
|
|
return 0;
|
||
|
|
if(!even(layout & (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT))) // no asymetric side
|
||
|
|
return 0;
|
||
|
|
if(!even(layout & (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)))
|
||
|
|
return 0;
|
||
|
|
if(!even(layout & (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)))
|
||
|
|
return 0;
|
||
|
|
if(av_get_channel_layout_nb_channels(layout) >= SWR_CH_MAX)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int swr_rematrix_init(SwrContext *s){
|
||
|
|
int i, j, in_i, out_i;
|
||
|
|
float matrix[64][64]={0};
|
||
|
|
int64_t unaccounted= s->in_ch_layout & ~s->out_ch_layout;
|
||
|
|
float maxcoef=0;
|
||
|
|
|
||
|
|
for(i=0; i<64; i++){
|
||
|
|
if(s->in_ch_layout & s->out_ch_layout & (1LL<<i))
|
||
|
|
matrix[i][i]= 1.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!sane_layout(s->in_ch_layout)){
|
||
|
|
av_log(s, AV_LOG_ERROR, "Input channel layout isnt supported\n");
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
if(!sane_layout(s->out_ch_layout)){
|
||
|
|
av_log(s, AV_LOG_ERROR, "Output channel layout isnt supported\n");
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
|
||
|
|
//FIXME implement dolby surround
|
||
|
|
//FIXME implement full ac3
|
||
|
|
|
||
|
|
|
||
|
|
if(unaccounted & AV_CH_FRONT_CENTER){
|
||
|
|
if((s->out_ch_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO){
|
||
|
|
matrix[ FRONT_LEFT][FRONT_CENTER]+= sqrt(0.5);
|
||
|
|
matrix[FRONT_RIGHT][FRONT_CENTER]+= sqrt(0.5);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
if(unaccounted & AV_CH_LAYOUT_STEREO){
|
||
|
|
if(s->out_ch_layout & AV_CH_FRONT_CENTER){
|
||
|
|
matrix[FRONT_CENTER][ FRONT_LEFT]+= sqrt(0.5);
|
||
|
|
matrix[FRONT_CENTER][FRONT_RIGHT]+= sqrt(0.5);
|
||
|
|
if(s->in_ch_layout & AV_CH_FRONT_CENTER)
|
||
|
|
matrix[FRONT_CENTER][ FRONT_CENTER] = s->clev*sqrt(2);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(unaccounted & AV_CH_BACK_CENTER){
|
||
|
|
if(s->out_ch_layout & AV_CH_BACK_LEFT){
|
||
|
|
matrix[ BACK_LEFT][BACK_CENTER]+= sqrt(0.5);
|
||
|
|
matrix[BACK_RIGHT][BACK_CENTER]+= sqrt(0.5);
|
||
|
|
}else if(s->out_ch_layout & AV_CH_SIDE_LEFT){
|
||
|
|
matrix[ SIDE_LEFT][BACK_CENTER]+= sqrt(0.5);
|
||
|
|
matrix[SIDE_RIGHT][BACK_CENTER]+= sqrt(0.5);
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
|
||
|
|
matrix[ FRONT_LEFT][BACK_CENTER]+= s->slev*sqrt(0.5);
|
||
|
|
matrix[FRONT_RIGHT][BACK_CENTER]+= s->slev*sqrt(0.5);
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
|
||
|
|
matrix[ FRONT_CENTER][BACK_CENTER]+= s->slev*sqrt(0.5);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
if(unaccounted & AV_CH_BACK_LEFT){
|
||
|
|
if(s->out_ch_layout & AV_CH_BACK_CENTER){
|
||
|
|
matrix[BACK_CENTER][ BACK_LEFT]+= sqrt(0.5);
|
||
|
|
matrix[BACK_CENTER][BACK_RIGHT]+= sqrt(0.5);
|
||
|
|
}else if(s->out_ch_layout & AV_CH_SIDE_LEFT){
|
||
|
|
if(s->in_ch_layout & AV_CH_SIDE_LEFT){
|
||
|
|
matrix[ SIDE_LEFT][ BACK_LEFT]+= sqrt(0.5);
|
||
|
|
matrix[SIDE_RIGHT][BACK_RIGHT]+= sqrt(0.5);
|
||
|
|
}else{
|
||
|
|
matrix[ SIDE_LEFT][ BACK_LEFT]+= 1.0;
|
||
|
|
matrix[SIDE_RIGHT][BACK_RIGHT]+= 1.0;
|
||
|
|
}
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
|
||
|
|
matrix[ FRONT_LEFT][ BACK_LEFT]+= s->slev;
|
||
|
|
matrix[FRONT_RIGHT][BACK_RIGHT]+= s->slev;
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
|
||
|
|
matrix[ FRONT_CENTER][BACK_LEFT ]+= s->slev*sqrt(0.5);
|
||
|
|
matrix[ FRONT_CENTER][BACK_RIGHT]+= s->slev*sqrt(0.5);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(unaccounted & AV_CH_SIDE_LEFT){
|
||
|
|
if(s->out_ch_layout & AV_CH_BACK_LEFT){
|
||
|
|
matrix[ BACK_LEFT][ SIDE_LEFT]+= 1.0;
|
||
|
|
matrix[BACK_RIGHT][SIDE_RIGHT]+= 1.0;
|
||
|
|
}else if(s->out_ch_layout & AV_CH_BACK_CENTER){
|
||
|
|
matrix[BACK_CENTER][ SIDE_LEFT]+= sqrt(0.5);
|
||
|
|
matrix[BACK_CENTER][SIDE_RIGHT]+= sqrt(0.5);
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
|
||
|
|
matrix[ FRONT_LEFT][ SIDE_LEFT]+= s->slev;
|
||
|
|
matrix[FRONT_RIGHT][SIDE_RIGHT]+= s->slev;
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
|
||
|
|
matrix[ FRONT_CENTER][SIDE_LEFT ]+= s->slev*sqrt(0.5);
|
||
|
|
matrix[ FRONT_CENTER][SIDE_RIGHT]+= s->slev*sqrt(0.5);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(unaccounted & AV_CH_FRONT_LEFT_OF_CENTER){
|
||
|
|
if(s->out_ch_layout & AV_CH_FRONT_LEFT){
|
||
|
|
matrix[ FRONT_LEFT][ FRONT_LEFT_OF_CENTER]+= 1.0;
|
||
|
|
matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER]+= 1.0;
|
||
|
|
}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
|
||
|
|
matrix[ FRONT_CENTER][ FRONT_LEFT_OF_CENTER]+= sqrt(0.5);
|
||
|
|
matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= sqrt(0.5);
|
||
|
|
}else
|
||
|
|
av_assert0(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
//FIXME quantize for integeres
|
||
|
|
for(out_i=i=0; i<64; i++){
|
||
|
|
double sum=0;
|
||
|
|
int in_i=0;
|
||
|
|
int ch_in=0;
|
||
|
|
for(j=0; j<64; j++){
|
||
|
|
s->matrix[out_i][in_i]= matrix[i][j];
|
||
|
|
if(matrix[i][j]){
|
||
|
|
s->matrix_ch[out_i][++ch_in]= in_i;
|
||
|
|
sum += fabs(matrix[i][j]);
|
||
|
|
}
|
||
|
|
if(s->in_ch_layout & (1ULL<<j))
|
||
|
|
in_i++;
|
||
|
|
}
|
||
|
|
s->matrix_ch[out_i][0]= ch_in;
|
||
|
|
maxcoef= FFMAX(maxcoef, sum);
|
||
|
|
if(s->out_ch_layout & (1ULL<<i))
|
||
|
|
out_i++;
|
||
|
|
}
|
||
|
|
if(( s->out_sample_fmt < AV_SAMPLE_FMT_FLT
|
||
|
|
|| s->int_sample_fmt < AV_SAMPLE_FMT_FLT) && maxcoef > 1.0){
|
||
|
|
for(i=0; i<SWR_CH_MAX; i++)
|
||
|
|
for(j=0; j<SWR_CH_MAX; j++)
|
||
|
|
s->matrix[i][j] /= maxcoef;
|
||
|
|
}
|
||
|
|
for(i=0; i<av_get_channel_layout_nb_channels(s->out_ch_layout); i++){
|
||
|
|
for(j=0; j<av_get_channel_layout_nb_channels(s->in_ch_layout); j++){
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "%f ", s->matrix[i][j]);
|
||
|
|
}
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "\n");
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int swr_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mustcopy){
|
||
|
|
int out_i, in_i, i, j;
|
||
|
|
|
||
|
|
av_assert0(out->ch_count == av_get_channel_layout_nb_channels(s->out_ch_layout));
|
||
|
|
av_assert0(in ->ch_count == av_get_channel_layout_nb_channels(s-> in_ch_layout));
|
||
|
|
|
||
|
|
for(out_i=0; out_i<out->ch_count; out_i++){
|
||
|
|
switch(s->matrix_ch[out_i][0]){
|
||
|
|
case 1:
|
||
|
|
in_i= s->matrix_ch[out_i][1];
|
||
|
|
if(mustcopy || s->matrix[out_i][in_i]!=1.0){
|
||
|
|
if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){
|
||
|
|
copy_float(out->ch[out_i], in->ch[in_i], s->matrix[out_i][in_i], len);
|
||
|
|
}else
|
||
|
|
copy_s16 (out->ch[out_i], in->ch[in_i], s->matrix[out_i][in_i], len);
|
||
|
|
}else{
|
||
|
|
out->ch[out_i]= in->ch[in_i];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){
|
||
|
|
sum2_float(out->ch[out_i], in->ch[ s->matrix_ch[out_i][1] ], in->ch[ s->matrix_ch[out_i][2] ],
|
||
|
|
s->matrix[out_i][ s->matrix_ch[out_i][1] ], s->matrix[out_i][ s->matrix_ch[out_i][2] ],
|
||
|
|
len);
|
||
|
|
}else{
|
||
|
|
sum2_s16 (out->ch[out_i], in->ch[ s->matrix_ch[out_i][1] ], in->ch[ s->matrix_ch[out_i][2] ],
|
||
|
|
s->matrix[out_i][ s->matrix_ch[out_i][1] ], s->matrix[out_i][ s->matrix_ch[out_i][2] ],
|
||
|
|
len);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){
|
||
|
|
for(i=0; i<len; i++){
|
||
|
|
float v=0;
|
||
|
|
for(j=0; j<s->matrix_ch[out_i][0]; j++){
|
||
|
|
in_i= s->matrix_ch[out_i][1+j];
|
||
|
|
v+= ((float*)in->ch[in_i])[i] * s->matrix[out_i][in_i];
|
||
|
|
}
|
||
|
|
((float*)out->ch[out_i])[i]= v;
|
||
|
|
}
|
||
|
|
}else{
|
||
|
|
for(i=0; i<len; i++){
|
||
|
|
int v=0;
|
||
|
|
for(j=0; j<s->matrix_ch[out_i][0]; j++){
|
||
|
|
in_i= s->matrix_ch[out_i][1+j];
|
||
|
|
v+= ((int16_t*)in->ch[in_i])[i] * s->matrix[out_i][in_i]; //FIXME use int16 coeffs
|
||
|
|
}
|
||
|
|
((int16_t*)out->ch[out_i])[i]= v;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|