2 * Copyright (C) 2011-2012 Michael Niedermayer (michaelni@gmx.at)
4 * This file is part of libswresample
6 * libswresample is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * libswresample is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with libswresample; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "swresample_internal.h"
22 #include "libavutil/audioconvert.h"
23 #include "libavutil/avassert.h"
29 #define RENAME(x) x ## _float
30 #include "rematrix_template.c"
41 #define RENAME(x) x ## _double
42 #include "rematrix_template.c"
50 #define R(x) (((x) + 16384)>>15)
51 #define SAMPLE int16_t
53 #define RENAME(x) x ## _s16
54 #include "rematrix_template.c"
59 #define FRONT_CENTER 2
60 #define LOW_FREQUENCY 3
63 #define FRONT_LEFT_OF_CENTER 6
64 #define FRONT_RIGHT_OF_CENTER 7
69 #define TOP_FRONT_LEFT 12
70 #define TOP_FRONT_CENTER 13
71 #define TOP_FRONT_RIGHT 14
72 #define TOP_BACK_LEFT 15
73 #define TOP_BACK_CENTER 16
74 #define TOP_BACK_RIGHT 17
76 int swr_set_matrix(struct SwrContext *s, const double *matrix, int stride)
78 int nb_in, nb_out, in, out;
80 if (!s || s->in_convert) // s needs to be allocated but not initialized
81 return AVERROR(EINVAL);
82 memset(s->matrix, 0, sizeof(s->matrix));
83 nb_in = av_get_channel_layout_nb_channels(s->in_ch_layout);
84 nb_out = av_get_channel_layout_nb_channels(s->out_ch_layout);
85 for (out = 0; out < nb_out; out++) {
86 for (in = 0; in < nb_in; in++)
87 s->matrix[out][in] = matrix[in];
90 s->rematrix_custom = 1;
94 static int even(int64_t layout){
96 if(layout&(layout-1)) return 1;
100 static int sane_layout(int64_t layout){
101 if(!(layout & AV_CH_LAYOUT_SURROUND)) // at least 1 front speaker
103 if(!even(layout & (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT))) // no asymetric front
105 if(!even(layout & (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT))) // no asymetric side
107 if(!even(layout & (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)))
109 if(!even(layout & (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)))
111 if(av_get_channel_layout_nb_channels(layout) >= SWR_CH_MAX)
117 static int auto_matrix(SwrContext *s)
120 double matrix[64][64]={{0}};
121 int64_t unaccounted= s->in_ch_layout & ~s->out_ch_layout;
124 memset(s->matrix, 0, sizeof(s->matrix));
126 if(s->in_ch_layout & s->out_ch_layout & (1LL<<i))
130 if(!sane_layout(s->in_ch_layout)){
131 av_log(s, AV_LOG_ERROR, "Input channel layout isnt supported\n");
132 return AVERROR(EINVAL);
134 if(!sane_layout(s->out_ch_layout)){
135 av_log(s, AV_LOG_ERROR, "Output channel layout isnt supported\n");
136 return AVERROR(EINVAL);
139 //FIXME implement dolby surround
140 //FIXME implement full ac3
143 if(unaccounted & AV_CH_FRONT_CENTER){
144 if((s->out_ch_layout & AV_CH_LAYOUT_STEREO) == AV_CH_LAYOUT_STEREO){
145 matrix[ FRONT_LEFT][FRONT_CENTER]+= M_SQRT1_2;
146 matrix[FRONT_RIGHT][FRONT_CENTER]+= M_SQRT1_2;
150 if(unaccounted & AV_CH_LAYOUT_STEREO){
151 if(s->out_ch_layout & AV_CH_FRONT_CENTER){
152 matrix[FRONT_CENTER][ FRONT_LEFT]+= M_SQRT1_2;
153 matrix[FRONT_CENTER][FRONT_RIGHT]+= M_SQRT1_2;
154 if(s->in_ch_layout & AV_CH_FRONT_CENTER)
155 matrix[FRONT_CENTER][ FRONT_CENTER] = s->clev*sqrt(2);
160 if(unaccounted & AV_CH_BACK_CENTER){
161 if(s->out_ch_layout & AV_CH_BACK_LEFT){
162 matrix[ BACK_LEFT][BACK_CENTER]+= M_SQRT1_2;
163 matrix[BACK_RIGHT][BACK_CENTER]+= M_SQRT1_2;
164 }else if(s->out_ch_layout & AV_CH_SIDE_LEFT){
165 matrix[ SIDE_LEFT][BACK_CENTER]+= M_SQRT1_2;
166 matrix[SIDE_RIGHT][BACK_CENTER]+= M_SQRT1_2;
167 }else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
168 matrix[ FRONT_LEFT][BACK_CENTER]+= s->slev*M_SQRT1_2;
169 matrix[FRONT_RIGHT][BACK_CENTER]+= s->slev*M_SQRT1_2;
170 }else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
171 matrix[ FRONT_CENTER][BACK_CENTER]+= s->slev*M_SQRT1_2;
175 if(unaccounted & AV_CH_BACK_LEFT){
176 if(s->out_ch_layout & AV_CH_BACK_CENTER){
177 matrix[BACK_CENTER][ BACK_LEFT]+= M_SQRT1_2;
178 matrix[BACK_CENTER][BACK_RIGHT]+= M_SQRT1_2;
179 }else if(s->out_ch_layout & AV_CH_SIDE_LEFT){
180 if(s->in_ch_layout & AV_CH_SIDE_LEFT){
181 matrix[ SIDE_LEFT][ BACK_LEFT]+= M_SQRT1_2;
182 matrix[SIDE_RIGHT][BACK_RIGHT]+= M_SQRT1_2;
184 matrix[ SIDE_LEFT][ BACK_LEFT]+= 1.0;
185 matrix[SIDE_RIGHT][BACK_RIGHT]+= 1.0;
187 }else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
188 matrix[ FRONT_LEFT][ BACK_LEFT]+= s->slev;
189 matrix[FRONT_RIGHT][BACK_RIGHT]+= s->slev;
190 }else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
191 matrix[ FRONT_CENTER][BACK_LEFT ]+= s->slev*M_SQRT1_2;
192 matrix[ FRONT_CENTER][BACK_RIGHT]+= s->slev*M_SQRT1_2;
197 if(unaccounted & AV_CH_SIDE_LEFT){
198 if(s->out_ch_layout & AV_CH_BACK_LEFT){
199 /* if back channels do not exist in the input, just copy side
200 channels to back channels, otherwise mix side into back */
201 if (s->in_ch_layout & AV_CH_BACK_LEFT) {
202 matrix[BACK_LEFT ][SIDE_LEFT ] += M_SQRT1_2;
203 matrix[BACK_RIGHT][SIDE_RIGHT] += M_SQRT1_2;
205 matrix[BACK_LEFT ][SIDE_LEFT ] += 1.0;
206 matrix[BACK_RIGHT][SIDE_RIGHT] += 1.0;
208 }else if(s->out_ch_layout & AV_CH_BACK_CENTER){
209 matrix[BACK_CENTER][ SIDE_LEFT]+= M_SQRT1_2;
210 matrix[BACK_CENTER][SIDE_RIGHT]+= M_SQRT1_2;
211 }else if(s->out_ch_layout & AV_CH_FRONT_LEFT){
212 matrix[ FRONT_LEFT][ SIDE_LEFT]+= s->slev;
213 matrix[FRONT_RIGHT][SIDE_RIGHT]+= s->slev;
214 }else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
215 matrix[ FRONT_CENTER][SIDE_LEFT ]+= s->slev*M_SQRT1_2;
216 matrix[ FRONT_CENTER][SIDE_RIGHT]+= s->slev*M_SQRT1_2;
221 if(unaccounted & AV_CH_FRONT_LEFT_OF_CENTER){
222 if(s->out_ch_layout & AV_CH_FRONT_LEFT){
223 matrix[ FRONT_LEFT][ FRONT_LEFT_OF_CENTER]+= 1.0;
224 matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER]+= 1.0;
225 }else if(s->out_ch_layout & AV_CH_FRONT_CENTER){
226 matrix[ FRONT_CENTER][ FRONT_LEFT_OF_CENTER]+= M_SQRT1_2;
227 matrix[ FRONT_CENTER][FRONT_RIGHT_OF_CENTER]+= M_SQRT1_2;
231 /* mix LFE into front left/right or center */
232 if (unaccounted & AV_CH_LOW_FREQUENCY) {
233 if (s->out_ch_layout & AV_CH_FRONT_CENTER) {
234 matrix[FRONT_CENTER][LOW_FREQUENCY] += s->lfe_mix_level;
235 } else if (s->out_ch_layout & AV_CH_FRONT_LEFT) {
236 matrix[FRONT_LEFT ][LOW_FREQUENCY] += s->lfe_mix_level * M_SQRT1_2;
237 matrix[FRONT_RIGHT][LOW_FREQUENCY] += s->lfe_mix_level * M_SQRT1_2;
242 for(out_i=i=0; i<64; i++){
246 s->matrix[out_i][in_i]= matrix[i][j];
248 sum += fabs(matrix[i][j]);
250 if(s->in_ch_layout & (1ULL<<j))
253 maxcoef= FFMAX(maxcoef, sum);
254 if(s->out_ch_layout & (1ULL<<i))
257 if(s->rematrix_volume < 0)
258 maxcoef = -s->rematrix_volume;
260 if(( av_get_packed_sample_fmt(s->out_sample_fmt) < AV_SAMPLE_FMT_FLT
261 || av_get_packed_sample_fmt(s->int_sample_fmt) < AV_SAMPLE_FMT_FLT) && maxcoef > 1.0){
262 for(i=0; i<SWR_CH_MAX; i++)
263 for(j=0; j<SWR_CH_MAX; j++){
264 s->matrix[i][j] /= maxcoef;
268 if(s->rematrix_volume > 0){
269 for(i=0; i<SWR_CH_MAX; i++)
270 for(j=0; j<SWR_CH_MAX; j++){
271 s->matrix[i][j] *= s->rematrix_volume;
275 for(i=0; i<av_get_channel_layout_nb_channels(s->out_ch_layout); i++){
276 for(j=0; j<av_get_channel_layout_nb_channels(s->in_ch_layout); j++){
277 av_log(NULL, AV_LOG_DEBUG, "%f ", s->matrix[i][j]);
279 av_log(NULL, AV_LOG_DEBUG, "\n");
284 int swri_rematrix_init(SwrContext *s){
286 int nb_in = av_get_channel_layout_nb_channels(s->in_ch_layout);
287 int nb_out = av_get_channel_layout_nb_channels(s->out_ch_layout);
289 if (!s->rematrix_custom) {
290 int r = auto_matrix(s);
294 if (s->midbuf.fmt == AV_SAMPLE_FMT_S16P){
295 s->native_matrix = av_mallocz(nb_in * nb_out * sizeof(int));
296 s->native_one = av_mallocz(sizeof(int));
297 for (i = 0; i < nb_out; i++)
298 for (j = 0; j < nb_in; j++)
299 ((int*)s->native_matrix)[i * nb_in + j] = lrintf(s->matrix[i][j] * 32768);
300 *((int*)s->native_one) = 32768;
301 s->mix_1_1_f = copy_s16;
302 s->mix_2_1_f = sum2_s16;
303 }else if(s->midbuf.fmt == AV_SAMPLE_FMT_FLTP){
304 s->native_matrix = av_mallocz(nb_in * nb_out * sizeof(float));
305 s->native_one = av_mallocz(sizeof(float));
306 for (i = 0; i < nb_out; i++)
307 for (j = 0; j < nb_in; j++)
308 ((float*)s->native_matrix)[i * nb_in + j] = s->matrix[i][j];
309 *((float*)s->native_one) = 1.0;
310 s->mix_1_1_f = copy_float;
311 s->mix_2_1_f = sum2_float;
312 }else if(s->midbuf.fmt == AV_SAMPLE_FMT_DBLP){
313 s->native_matrix = av_mallocz(nb_in * nb_out * sizeof(double));
314 s->native_one = av_mallocz(sizeof(double));
315 for (i = 0; i < nb_out; i++)
316 for (j = 0; j < nb_in; j++)
317 ((double*)s->native_matrix)[i * nb_in + j] = s->matrix[i][j];
318 *((double*)s->native_one) = 1.0;
319 s->mix_1_1_f = copy_double;
320 s->mix_2_1_f = sum2_double;
323 //FIXME quantize for integeres
324 for (i = 0; i < SWR_CH_MAX; i++) {
326 for (j = 0; j < SWR_CH_MAX; j++) {
327 s->matrix32[i][j]= lrintf(s->matrix[i][j] * 32768);
329 s->matrix_ch[i][++ch_in]= j;
331 s->matrix_ch[i][0]= ch_in;
336 void swri_rematrix_free(SwrContext *s){
337 av_freep(&s->native_matrix);
338 av_freep(&s->native_one);
341 int swri_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mustcopy){
342 int out_i, in_i, i, j;
344 av_assert0(out->ch_count == av_get_channel_layout_nb_channels(s->out_ch_layout));
345 av_assert0(in ->ch_count == av_get_channel_layout_nb_channels(s-> in_ch_layout));
347 for(out_i=0; out_i<out->ch_count; out_i++){
348 switch(s->matrix_ch[out_i][0]){
350 memset(out->ch[out_i], 0, len * av_get_bytes_per_sample(s->int_sample_fmt));
353 in_i= s->matrix_ch[out_i][1];
354 if(s->matrix[out_i][in_i]!=1.0){
355 s->mix_1_1_f(out->ch[out_i], in->ch[in_i], s->native_matrix, in->ch_count*out_i + in_i, len);
357 memcpy(out->ch[out_i], in->ch[in_i], len*out->bps);
359 out->ch[out_i]= in->ch[in_i];
363 int in_i1 = s->matrix_ch[out_i][1];
364 int in_i2 = s->matrix_ch[out_i][2];
365 s->mix_2_1_f(out->ch[out_i], in->ch[in_i1], in->ch[in_i2], s->native_matrix, in->ch_count*out_i + in_i1, in->ch_count*out_i + in_i2, len);
368 if(s->int_sample_fmt == AV_SAMPLE_FMT_FLTP){
369 for(i=0; i<len; i++){
371 for(j=0; j<s->matrix_ch[out_i][0]; j++){
372 in_i= s->matrix_ch[out_i][1+j];
373 v+= ((float*)in->ch[in_i])[i] * s->matrix[out_i][in_i];
375 ((float*)out->ch[out_i])[i]= v;
377 }else if(s->int_sample_fmt == AV_SAMPLE_FMT_DBLP){
378 for(i=0; i<len; i++){
380 for(j=0; j<s->matrix_ch[out_i][0]; j++){
381 in_i= s->matrix_ch[out_i][1+j];
382 v+= ((double*)in->ch[in_i])[i] * s->matrix[out_i][in_i];
384 ((double*)out->ch[out_i])[i]= v;
387 for(i=0; i<len; i++){
389 for(j=0; j<s->matrix_ch[out_i][0]; j++){
390 in_i= s->matrix_ch[out_i][1+j];
391 v+= ((int16_t*)in->ch[in_i])[i] * s->matrix32[out_i][in_i];
393 ((int16_t*)out->ch[out_i])[i]= (v + 16384)>>15;