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295 lines
11 KiB
295 lines
11 KiB
/* |
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* Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at) |
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* |
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* This file is part of libswresample |
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* |
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* libswresample is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* libswresample is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with libswresample; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "swresample_internal.h" |
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#include "libavutil/audioconvert.h" |
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#include "libavutil/avassert.h" |
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#define ONE (1.0) |
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#define R(x) x |
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#define SAMPLE float |
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#define COEFF float |
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#define RENAME(x) x ## _float |
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#include "rematrix_template.c" |
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#undef SAMPLE |
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#undef RENAME |
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#undef R |
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#undef ONE |
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#undef COEFF |
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#define ONE (-32768) |
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#define R(x) (((x) + 16384)>>15) |
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#define SAMPLE int16_t |
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#define COEFF int |
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#define RENAME(x) x ## _s16 |
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#include "rematrix_template.c" |
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#define FRONT_LEFT 0 |
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#define FRONT_RIGHT 1 |
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#define FRONT_CENTER 2 |
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#define LOW_FREQUENCY 3 |
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#define BACK_LEFT 4 |
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#define BACK_RIGHT 5 |
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#define FRONT_LEFT_OF_CENTER 6 |
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#define FRONT_RIGHT_OF_CENTER 7 |
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#define BACK_CENTER 8 |
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#define SIDE_LEFT 9 |
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#define SIDE_RIGHT 10 |
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#define TOP_CENTER 11 |
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#define TOP_FRONT_LEFT 12 |
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#define TOP_FRONT_CENTER 13 |
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#define TOP_FRONT_RIGHT 14 |
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#define TOP_BACK_LEFT 15 |
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#define TOP_BACK_CENTER 16 |
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#define TOP_BACK_RIGHT 17 |
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static int even(int64_t layout){ |
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if(!layout) return 1; |
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if(layout&(layout-1)) return 1; |
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return 0; |
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} |
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static int sane_layout(int64_t layout){ |
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if(!(layout & AV_CH_LAYOUT_SURROUND)) // at least 1 front speaker |
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return 0; |
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if(!even(layout & (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT))) // no asymetric front |
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return 0; |
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if(!even(layout & (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT))) // no asymetric side |
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return 0; |
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if(!even(layout & (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT))) |
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return 0; |
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if(!even(layout & (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER))) |
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return 0; |
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if(av_get_channel_layout_nb_channels(layout) >= SWR_CH_MAX) |
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return 0; |
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return 1; |
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} |
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int swr_rematrix_init(SwrContext *s){ |
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int i, j, out_i; |
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double matrix[64][64]={{0}}; |
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int64_t unaccounted= s->in_ch_layout & ~s->out_ch_layout; |
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double maxcoef=0; |
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for(i=0; i<64; i++){ |
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if(s->in_ch_layout & s->out_ch_layout & (1LL<<i)) |
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matrix[i][i]= 1.0; |
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} |
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if(!sane_layout(s->in_ch_layout)){ |
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av_log(s, AV_LOG_ERROR, "Input channel layout isnt supported\n"); |
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return AVERROR(EINVAL); |
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} |
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if(!sane_layout(s->out_ch_layout)){ |
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av_log(s, AV_LOG_ERROR, "Output channel layout isnt supported\n"); |
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return AVERROR(EINVAL); |
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} |
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//FIXME implement dolby surround |
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//FIXME implement full ac3 |
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if(unaccounted & AV_CH_FRONT_CENTER){ |
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if((s->out_ch_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO){ |
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matrix[ FRONT_LEFT][FRONT_CENTER]+= M_SQRT1_2; |
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matrix[FRONT_RIGHT][FRONT_CENTER]+= M_SQRT1_2; |
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}else |
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av_assert0(0); |
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} |
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if(unaccounted & AV_CH_LAYOUT_STEREO){ |
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if(s->out_ch_layout & AV_CH_FRONT_CENTER){ |
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matrix[FRONT_CENTER][ FRONT_LEFT]+= M_SQRT1_2; |
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matrix[FRONT_CENTER][FRONT_RIGHT]+= M_SQRT1_2; |
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if(s->in_ch_layout & AV_CH_FRONT_CENTER) |
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matrix[FRONT_CENTER][ FRONT_CENTER] = s->clev*sqrt(2); |
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}else |
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av_assert0(0); |
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} |
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if(unaccounted & AV_CH_BACK_CENTER){ |
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if(s->out_ch_layout & AV_CH_BACK_LEFT){ |
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matrix[ BACK_LEFT][BACK_CENTER]+= M_SQRT1_2; |
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matrix[BACK_RIGHT][BACK_CENTER]+= M_SQRT1_2; |
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}else if(s->out_ch_layout & AV_CH_SIDE_LEFT){ |
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matrix[ SIDE_LEFT][BACK_CENTER]+= M_SQRT1_2; |
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matrix[SIDE_RIGHT][BACK_CENTER]+= M_SQRT1_2; |
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}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){ |
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matrix[ FRONT_LEFT][BACK_CENTER]+= s->slev*M_SQRT1_2; |
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matrix[FRONT_RIGHT][BACK_CENTER]+= s->slev*M_SQRT1_2; |
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}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){ |
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matrix[ FRONT_CENTER][BACK_CENTER]+= s->slev*M_SQRT1_2; |
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}else |
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av_assert0(0); |
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} |
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if(unaccounted & AV_CH_BACK_LEFT){ |
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if(s->out_ch_layout & AV_CH_BACK_CENTER){ |
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matrix[BACK_CENTER][ BACK_LEFT]+= M_SQRT1_2; |
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matrix[BACK_CENTER][BACK_RIGHT]+= M_SQRT1_2; |
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}else if(s->out_ch_layout & AV_CH_SIDE_LEFT){ |
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if(s->in_ch_layout & AV_CH_SIDE_LEFT){ |
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matrix[ SIDE_LEFT][ BACK_LEFT]+= M_SQRT1_2; |
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matrix[SIDE_RIGHT][BACK_RIGHT]+= M_SQRT1_2; |
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}else{ |
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matrix[ SIDE_LEFT][ BACK_LEFT]+= 1.0; |
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matrix[SIDE_RIGHT][BACK_RIGHT]+= 1.0; |
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} |
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}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){ |
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matrix[ FRONT_LEFT][ BACK_LEFT]+= s->slev; |
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matrix[FRONT_RIGHT][BACK_RIGHT]+= s->slev; |
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}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){ |
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matrix[ FRONT_CENTER][BACK_LEFT ]+= s->slev*M_SQRT1_2; |
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matrix[ FRONT_CENTER][BACK_RIGHT]+= s->slev*M_SQRT1_2; |
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}else |
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av_assert0(0); |
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} |
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if(unaccounted & AV_CH_SIDE_LEFT){ |
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if(s->out_ch_layout & AV_CH_BACK_LEFT){ |
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matrix[ BACK_LEFT][ SIDE_LEFT]+= 1.0; |
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matrix[BACK_RIGHT][SIDE_RIGHT]+= 1.0; |
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}else if(s->out_ch_layout & AV_CH_BACK_CENTER){ |
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matrix[BACK_CENTER][ SIDE_LEFT]+= M_SQRT1_2; |
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matrix[BACK_CENTER][SIDE_RIGHT]+= M_SQRT1_2; |
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}else if(s->out_ch_layout & AV_CH_FRONT_LEFT){ |
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matrix[ FRONT_LEFT][ SIDE_LEFT]+= s->slev; |
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matrix[FRONT_RIGHT][SIDE_RIGHT]+= s->slev; |
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}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){ |
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matrix[ FRONT_CENTER][SIDE_LEFT ]+= s->slev*M_SQRT1_2; |
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matrix[ FRONT_CENTER][SIDE_RIGHT]+= s->slev*M_SQRT1_2; |
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}else |
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av_assert0(0); |
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} |
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if(unaccounted & AV_CH_FRONT_LEFT_OF_CENTER){ |
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if(s->out_ch_layout & AV_CH_FRONT_LEFT){ |
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matrix[ FRONT_LEFT][ FRONT_LEFT_OF_CENTER]+= 1.0; |
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matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER]+= 1.0; |
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}else if(s->out_ch_layout & AV_CH_FRONT_CENTER){ |
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matrix[ FRONT_CENTER][ FRONT_LEFT_OF_CENTER]+= M_SQRT1_2; |
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matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= M_SQRT1_2; |
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}else |
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av_assert0(0); |
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} |
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//FIXME quantize for integeres |
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for(out_i=i=0; i<64; i++){ |
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double sum=0; |
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int in_i=0; |
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int ch_in=0; |
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for(j=0; j<64; j++){ |
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s->matrix[out_i][in_i]= matrix[i][j]; |
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s->matrix32[out_i][in_i]= lrintf(matrix[i][j] * 32768); |
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if(matrix[i][j]){ |
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s->matrix_ch[out_i][++ch_in]= in_i; |
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sum += fabs(matrix[i][j]); |
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} |
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if(s->in_ch_layout & (1ULL<<j)) |
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in_i++; |
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} |
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s->matrix_ch[out_i][0]= ch_in; |
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maxcoef= FFMAX(maxcoef, sum); |
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if(s->out_ch_layout & (1ULL<<i)) |
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out_i++; |
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} |
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if(s->rematrix_volume < 0) |
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maxcoef = -s->rematrix_volume; |
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if(( s->out_sample_fmt < AV_SAMPLE_FMT_FLT |
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|| s->int_sample_fmt < AV_SAMPLE_FMT_FLT) && maxcoef > 1.0){ |
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for(i=0; i<SWR_CH_MAX; i++) |
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for(j=0; j<SWR_CH_MAX; j++){ |
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s->matrix[i][j] /= maxcoef; |
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s->matrix32[i][j]= lrintf(s->matrix[i][j] * 32768); |
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} |
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} |
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if(s->rematrix_volume > 0){ |
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for(i=0; i<SWR_CH_MAX; i++) |
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for(j=0; j<SWR_CH_MAX; j++){ |
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s->matrix[i][j] *= s->rematrix_volume; |
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s->matrix32[i][j]= lrintf(s->matrix[i][j] * 32768); |
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} |
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} |
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for(i=0; i<av_get_channel_layout_nb_channels(s->out_ch_layout); i++){ |
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for(j=0; j<av_get_channel_layout_nb_channels(s->in_ch_layout); j++){ |
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av_log(NULL, AV_LOG_DEBUG, "%f ", s->matrix[i][j]); |
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} |
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av_log(NULL, AV_LOG_DEBUG, "\n"); |
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} |
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return 0; |
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} |
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int swr_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mustcopy){ |
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int out_i, in_i, i, j; |
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av_assert0(out->ch_count == av_get_channel_layout_nb_channels(s->out_ch_layout)); |
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av_assert0(in ->ch_count == av_get_channel_layout_nb_channels(s-> in_ch_layout)); |
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for(out_i=0; out_i<out->ch_count; out_i++){ |
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switch(s->matrix_ch[out_i][0]){ |
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case 1: |
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in_i= s->matrix_ch[out_i][1]; |
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if(mustcopy || s->matrix[out_i][in_i]!=1.0){ |
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if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){ |
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copy_float((float *)out->ch[out_i], (const float *)in->ch[in_i], s->matrix [out_i][in_i], len); |
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}else |
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copy_s16 ((int16_t*)out->ch[out_i], (const int16_t*)in->ch[in_i], s->matrix32[out_i][in_i], len); |
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}else{ |
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out->ch[out_i]= in->ch[in_i]; |
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} |
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break; |
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case 2: |
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if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){ |
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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] ], |
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s->matrix[out_i][ s->matrix_ch[out_i][1] ], s->matrix[out_i][ s->matrix_ch[out_i][2] ], |
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len); |
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}else{ |
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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] ], |
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s->matrix32[out_i][ s->matrix_ch[out_i][1] ], s->matrix32[out_i][ s->matrix_ch[out_i][2] ], |
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len); |
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} |
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break; |
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default: |
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if(s->int_sample_fmt == AV_SAMPLE_FMT_FLT){ |
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for(i=0; i<len; i++){ |
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float v=0; |
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for(j=0; j<s->matrix_ch[out_i][0]; j++){ |
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in_i= s->matrix_ch[out_i][1+j]; |
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v+= ((float*)in->ch[in_i])[i] * s->matrix[out_i][in_i]; |
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} |
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((float*)out->ch[out_i])[i]= v; |
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} |
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}else{ |
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for(i=0; i<len; i++){ |
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int v=0; |
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for(j=0; j<s->matrix_ch[out_i][0]; j++){ |
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in_i= s->matrix_ch[out_i][1+j]; |
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v+= ((int16_t*)in->ch[in_i])[i] * s->matrix32[out_i][in_i]; |
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} |
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((int16_t*)out->ch[out_i])[i]= (v + 16384)>>15; |
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} |
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} |
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} |
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} |
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return 0; |
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}
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