diff options
Diffstat (limited to 'libswresample/rematrix.c')
-rw-r--r-- | libswresample/rematrix.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/libswresample/rematrix.c b/libswresample/rematrix.c new file mode 100644 index 0000000000..0e4d9630c8 --- /dev/null +++ b/libswresample/rematrix.c @@ -0,0 +1,295 @@ +/* + * 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 ONE (1.0) +#define R(x) x +#define SAMPLE float +#define COEFF float +#define RENAME(x) x ## _float +#include "rematrix_template.c" +#undef SAMPLE +#undef RENAME +#undef R +#undef ONE +#undef COEFF + +#define ONE (-32768) +#define R(x) (((x) + 16384)>>15) +#define SAMPLE int16_t +#define COEFF int +#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 swri_rematrix_init(SwrContext *s){ + int i, j, out_i; + double matrix[64][64]={{0}}; + int64_t unaccounted= s->in_ch_layout & ~s->out_ch_layout; + double 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]+= M_SQRT1_2; + matrix[FRONT_RIGHT][FRONT_CENTER]+= M_SQRT1_2; + }else + av_assert0(0); + } + if(unaccounted & AV_CH_LAYOUT_STEREO){ + if(s->out_ch_layout & AV_CH_FRONT_CENTER){ + matrix[FRONT_CENTER][ FRONT_LEFT]+= M_SQRT1_2; + matrix[FRONT_CENTER][FRONT_RIGHT]+= M_SQRT1_2; + 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]+= M_SQRT1_2; + matrix[BACK_RIGHT][BACK_CENTER]+= M_SQRT1_2; + }else if(s->out_ch_layout & AV_CH_SIDE_LEFT){ + matrix[ SIDE_LEFT][BACK_CENTER]+= M_SQRT1_2; + matrix[SIDE_RIGHT][BACK_CENTER]+= M_SQRT1_2; + }else if(s->out_ch_layout & AV_CH_FRONT_LEFT){ + matrix[ FRONT_LEFT][BACK_CENTER]+= s->slev*M_SQRT1_2; + matrix[FRONT_RIGHT][BACK_CENTER]+= s->slev*M_SQRT1_2; + }else if(s->out_ch_layout & AV_CH_FRONT_CENTER){ + matrix[ FRONT_CENTER][BACK_CENTER]+= s->slev*M_SQRT1_2; + }else + av_assert0(0); + } + if(unaccounted & AV_CH_BACK_LEFT){ + if(s->out_ch_layout & AV_CH_BACK_CENTER){ + matrix[BACK_CENTER][ BACK_LEFT]+= M_SQRT1_2; + matrix[BACK_CENTER][BACK_RIGHT]+= M_SQRT1_2; + }else if(s->out_ch_layout & AV_CH_SIDE_LEFT){ + if(s->in_ch_layout & AV_CH_SIDE_LEFT){ + matrix[ SIDE_LEFT][ BACK_LEFT]+= M_SQRT1_2; + matrix[SIDE_RIGHT][BACK_RIGHT]+= M_SQRT1_2; + }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*M_SQRT1_2; + matrix[ FRONT_CENTER][BACK_RIGHT]+= s->slev*M_SQRT1_2; + }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]+= M_SQRT1_2; + matrix[BACK_CENTER][SIDE_RIGHT]+= M_SQRT1_2; + }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*M_SQRT1_2; + matrix[ FRONT_CENTER][SIDE_RIGHT]+= s->slev*M_SQRT1_2; + }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]+= M_SQRT1_2; + matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= M_SQRT1_2; + }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]; + s->matrix32[out_i][in_i]= lrintf(matrix[i][j] * 32768); + 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->rematrix_volume < 0) + maxcoef = -s->rematrix_volume; + + 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; + s->matrix32[i][j]= lrintf(s->matrix[i][j] * 32768); + } + } + + if(s->rematrix_volume > 0){ + for(i=0; i<SWR_CH_MAX; i++) + for(j=0; j<SWR_CH_MAX; j++){ + s->matrix[i][j] *= s->rematrix_volume; + s->matrix32[i][j]= lrintf(s->matrix[i][j] * 32768); + } + } + + 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_DEBUG, "%f ", s->matrix[i][j]); + } + av_log(NULL, AV_LOG_DEBUG, "\n"); + } + return 0; +} + +int swri_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((float *)out->ch[out_i], (const float *)in->ch[in_i], s->matrix [out_i][in_i], len); + }else + copy_s16 ((int16_t*)out->ch[out_i], (const int16_t*)in->ch[in_i], s->matrix32[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((float *)out->ch[out_i], (const float *)in->ch[ s->matrix_ch[out_i][1] ], (const float *)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 ((int16_t*)out->ch[out_i], (const int16_t*)in->ch[ s->matrix_ch[out_i][1] ], (const int16_t*)in->ch[ s->matrix_ch[out_i][2] ], + s->matrix32[out_i][ s->matrix_ch[out_i][1] ], s->matrix32[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->matrix32[out_i][in_i]; + } + ((int16_t*)out->ch[out_i])[i]= (v + 16384)>>15; + } + } + } + } + return 0; +} |