| /* |
| * 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; |
| } |
