2 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4 * This file is part of Libav.
6 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/common.h"
24 #include "libavutil/libm.h"
25 #include "libavutil/samplefmt.h"
26 #include "avresample.h"
28 #include "audio_data.h"
29 #include "audio_mix.h"
31 static const char *coeff_type_names[] = { "q8", "q15", "flt" };
33 void ff_audio_mix_set_func(AudioMix *am, enum AVSampleFormat fmt,
34 enum AVMixCoeffType coeff_type, int in_channels,
35 int out_channels, int ptr_align, int samples_align,
36 const char *descr, void *mix_func)
38 if (fmt == am->fmt && coeff_type == am->coeff_type &&
39 ( in_channels == am->in_channels || in_channels == 0) &&
40 (out_channels == am->out_channels || out_channels == 0)) {
43 am->func_descr = descr;
44 am->ptr_align = ptr_align;
45 am->samples_align = samples_align;
46 if (ptr_align == 1 && samples_align == 1) {
47 am->mix_generic = mix_func;
48 am->func_descr_generic = descr;
50 am->has_optimized_func = 1;
54 snprintf(chan_str, sizeof(chan_str), "[%d to %d] ",
55 in_channels, out_channels);
57 snprintf(chan_str, sizeof(chan_str), "[%d to any] ",
59 } else if (out_channels) {
60 snprintf(chan_str, sizeof(chan_str), "[any to %d] ",
63 av_log(am->avr, AV_LOG_DEBUG, "audio_mix: found function: [fmt=%s] "
64 "[c=%s] %s(%s)\n", av_get_sample_fmt_name(fmt),
65 coeff_type_names[coeff_type],
66 (in_channels || out_channels) ? chan_str : "", descr);
70 #define MIX_FUNC_NAME(fmt, cfmt) mix_any_ ## fmt ##_## cfmt ##_c
72 #define MIX_FUNC_GENERIC(fmt, cfmt, stype, ctype, sumtype, expr) \
73 static void MIX_FUNC_NAME(fmt, cfmt)(stype **samples, ctype **matrix, \
74 int len, int out_ch, int in_ch) \
77 stype temp[AVRESAMPLE_MAX_CHANNELS]; \
78 for (i = 0; i < len; i++) { \
79 for (out = 0; out < out_ch; out++) { \
81 for (in = 0; in < in_ch; in++) \
82 sum += samples[in][i] * matrix[out][in]; \
85 for (out = 0; out < out_ch; out++) \
86 samples[out][i] = temp[out]; \
90 MIX_FUNC_GENERIC(FLTP, FLT, float, float, float, sum)
91 MIX_FUNC_GENERIC(S16P, FLT, int16_t, float, float, av_clip_int16(lrintf(sum)))
92 MIX_FUNC_GENERIC(S16P, Q15, int16_t, int32_t, int64_t, av_clip_int16(sum >> 15))
93 MIX_FUNC_GENERIC(S16P, Q8, int16_t, int16_t, int32_t, av_clip_int16(sum >> 8))
95 /* TODO: templatize the channel-specific C functions */
97 static void mix_2_to_1_fltp_flt_c(float **samples, float **matrix, int len,
98 int out_ch, int in_ch)
100 float *src0 = samples[0];
101 float *src1 = samples[1];
103 float m0 = matrix[0][0];
104 float m1 = matrix[0][1];
107 *dst++ = *src0++ * m0 + *src1++ * m1;
108 *dst++ = *src0++ * m0 + *src1++ * m1;
109 *dst++ = *src0++ * m0 + *src1++ * m1;
110 *dst++ = *src0++ * m0 + *src1++ * m1;
114 *dst++ = *src0++ * m0 + *src1++ * m1;
119 static void mix_2_to_1_s16p_flt_c(int16_t **samples, float **matrix, int len,
120 int out_ch, int in_ch)
122 int16_t *src0 = samples[0];
123 int16_t *src1 = samples[1];
125 float m0 = matrix[0][0];
126 float m1 = matrix[0][1];
129 *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
130 *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
131 *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
132 *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
136 *dst++ = av_clip_int16(lrintf(*src0++ * m0 + *src1++ * m1));
141 static void mix_2_to_1_s16p_q8_c(int16_t **samples, int16_t **matrix, int len,
142 int out_ch, int in_ch)
144 int16_t *src0 = samples[0];
145 int16_t *src1 = samples[1];
147 int16_t m0 = matrix[0][0];
148 int16_t m1 = matrix[0][1];
151 *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
152 *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
153 *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
154 *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
158 *dst++ = (*src0++ * m0 + *src1++ * m1) >> 8;
163 static void mix_1_to_2_fltp_flt_c(float **samples, float **matrix, int len,
164 int out_ch, int in_ch)
167 float *dst0 = samples[0];
168 float *dst1 = samples[1];
170 float m0 = matrix[0][0];
171 float m1 = matrix[1][0];
196 static void mix_6_to_2_fltp_flt_c(float **samples, float **matrix, int len,
197 int out_ch, int in_ch)
200 float *src0 = samples[0];
201 float *src1 = samples[1];
202 float *src2 = samples[2];
203 float *src3 = samples[3];
204 float *src4 = samples[4];
205 float *src5 = samples[5];
208 float *m0 = matrix[0];
209 float *m1 = matrix[1];
214 *dst0++ = v0 * m0[0] +
220 *dst1++ = v0 * m1[0] +
230 static void mix_2_to_6_fltp_flt_c(float **samples, float **matrix, int len,
231 int out_ch, int in_ch)
234 float *dst0 = samples[0];
235 float *dst1 = samples[1];
236 float *dst2 = samples[2];
237 float *dst3 = samples[3];
238 float *dst4 = samples[4];
239 float *dst5 = samples[5];
246 *dst0++ = v0 * matrix[0][0] + v1 * matrix[0][1];
247 *dst1++ = v0 * matrix[1][0] + v1 * matrix[1][1];
248 *dst2++ = v0 * matrix[2][0] + v1 * matrix[2][1];
249 *dst3++ = v0 * matrix[3][0] + v1 * matrix[3][1];
250 *dst4++ = v0 * matrix[4][0] + v1 * matrix[4][1];
251 *dst5++ = v0 * matrix[5][0] + v1 * matrix[5][1];
256 static int mix_function_init(AudioMix *am)
258 /* any-to-any C versions */
260 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
261 0, 0, 1, 1, "C", MIX_FUNC_NAME(FLTP, FLT));
263 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_FLT,
264 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, FLT));
266 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q15,
267 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, Q15));
269 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q8,
270 0, 0, 1, 1, "C", MIX_FUNC_NAME(S16P, Q8));
272 /* channel-specific C versions */
274 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
275 2, 1, 1, 1, "C", mix_2_to_1_fltp_flt_c);
277 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_FLT,
278 2, 1, 1, 1, "C", mix_2_to_1_s16p_flt_c);
280 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_S16P, AV_MIX_COEFF_TYPE_Q8,
281 2, 1, 1, 1, "C", mix_2_to_1_s16p_q8_c);
283 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
284 1, 2, 1, 1, "C", mix_1_to_2_fltp_flt_c);
286 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
287 6, 2, 1, 1, "C", mix_6_to_2_fltp_flt_c);
289 ff_audio_mix_set_func(am, AV_SAMPLE_FMT_FLTP, AV_MIX_COEFF_TYPE_FLT,
290 2, 6, 1, 1, "C", mix_2_to_6_fltp_flt_c);
293 ff_audio_mix_init_x86(am);
296 av_log(am->avr, AV_LOG_ERROR, "audio_mix: NO FUNCTION FOUND: [fmt=%s] "
297 "[c=%s] [%d to %d]\n", av_get_sample_fmt_name(am->fmt),
298 coeff_type_names[am->coeff_type], am->in_channels,
300 return AVERROR_PATCHWELCOME;
305 AudioMix *ff_audio_mix_alloc(AVAudioResampleContext *avr)
310 am = av_mallocz(sizeof(*am));
315 if (avr->internal_sample_fmt != AV_SAMPLE_FMT_S16P &&
316 avr->internal_sample_fmt != AV_SAMPLE_FMT_FLTP) {
317 av_log(avr, AV_LOG_ERROR, "Unsupported internal format for "
319 av_get_sample_fmt_name(avr->internal_sample_fmt));
323 am->fmt = avr->internal_sample_fmt;
324 am->coeff_type = avr->mix_coeff_type;
325 am->in_layout = avr->in_channel_layout;
326 am->out_layout = avr->out_channel_layout;
327 am->in_channels = avr->in_channels;
328 am->out_channels = avr->out_channels;
330 /* build matrix if the user did not already set one */
331 if (avr->mix_matrix) {
332 ret = ff_audio_mix_set_matrix(am, avr->mix_matrix, avr->in_channels);
335 av_freep(&avr->mix_matrix);
338 char in_layout_name[128];
339 char out_layout_name[128];
340 double *matrix_dbl = av_mallocz(avr->out_channels * avr->in_channels *
341 sizeof(*matrix_dbl));
345 ret = avresample_build_matrix(avr->in_channel_layout,
346 avr->out_channel_layout,
347 avr->center_mix_level,
348 avr->surround_mix_level,
350 avr->normalize_mix_level,
353 avr->matrix_encoding);
359 av_get_channel_layout_string(in_layout_name, sizeof(in_layout_name),
360 avr->in_channels, avr->in_channel_layout);
361 av_get_channel_layout_string(out_layout_name, sizeof(out_layout_name),
362 avr->out_channels, avr->out_channel_layout);
363 av_log(avr, AV_LOG_DEBUG, "audio_mix: %s to %s\n",
364 in_layout_name, out_layout_name);
365 for (i = 0; i < avr->out_channels; i++) {
366 for (j = 0; j < avr->in_channels; j++) {
367 av_log(avr, AV_LOG_DEBUG, " %0.3f ",
368 matrix_dbl[i * avr->in_channels + j]);
370 av_log(avr, AV_LOG_DEBUG, "\n");
373 ret = ff_audio_mix_set_matrix(am, matrix_dbl, avr->in_channels);
381 ret = mix_function_init(am);
392 void ff_audio_mix_free(AudioMix **am_p)
401 av_free(am->matrix[0]);
404 memset(am->matrix_q8, 0, sizeof(am->matrix_q8 ));
405 memset(am->matrix_q15, 0, sizeof(am->matrix_q15));
406 memset(am->matrix_flt, 0, sizeof(am->matrix_flt));
411 int ff_audio_mix(AudioMix *am, AudioData *src)
414 int len = src->nb_samples;
416 /* determine whether to use the optimized function based on pointer and
417 samples alignment in both the input and output */
418 if (am->has_optimized_func) {
419 int aligned_len = FFALIGN(len, am->samples_align);
420 if (!(src->ptr_align % am->ptr_align) &&
421 src->samples_align >= aligned_len) {
426 av_dlog(am->avr, "audio_mix: %d samples - %d to %d channels (%s)\n",
427 src->nb_samples, am->in_channels, am->out_channels,
428 use_generic ? am->func_descr_generic : am->func_descr);
431 am->mix_generic(src->data, am->matrix, len, am->out_channels,
434 am->mix(src->data, am->matrix, len, am->out_channels, am->in_channels);
436 ff_audio_data_set_channels(src, am->out_channels);
441 int ff_audio_mix_get_matrix(AudioMix *am, double *matrix, int stride)
445 if ( am->in_channels <= 0 || am->in_channels > AVRESAMPLE_MAX_CHANNELS ||
446 am->out_channels <= 0 || am->out_channels > AVRESAMPLE_MAX_CHANNELS) {
447 av_log(am, AV_LOG_ERROR, "Invalid channel counts\n");
448 return AVERROR(EINVAL);
451 #define GET_MATRIX_CONVERT(suffix, scale) \
452 if (!am->matrix_ ## suffix[0]) { \
453 av_log(am, AV_LOG_ERROR, "matrix is not set\n"); \
454 return AVERROR(EINVAL); \
456 for (o = 0; o < am->out_channels; o++) \
457 for (i = 0; i < am->in_channels; i++) \
458 matrix[o * stride + i] = am->matrix_ ## suffix[o][i] * (scale);
460 switch (am->coeff_type) {
461 case AV_MIX_COEFF_TYPE_Q8:
462 GET_MATRIX_CONVERT(q8, 1.0 / 256.0);
464 case AV_MIX_COEFF_TYPE_Q15:
465 GET_MATRIX_CONVERT(q15, 1.0 / 32768.0);
467 case AV_MIX_COEFF_TYPE_FLT:
468 GET_MATRIX_CONVERT(flt, 1.0);
471 av_log(am, AV_LOG_ERROR, "Invalid mix coeff type\n");
472 return AVERROR(EINVAL);
478 int ff_audio_mix_set_matrix(AudioMix *am, const double *matrix, int stride)
482 if ( am->in_channels <= 0 || am->in_channels > AVRESAMPLE_MAX_CHANNELS ||
483 am->out_channels <= 0 || am->out_channels > AVRESAMPLE_MAX_CHANNELS) {
484 av_log(am, AV_LOG_ERROR, "Invalid channel counts\n");
485 return AVERROR(EINVAL);
489 av_free(am->matrix[0]);
493 #define CONVERT_MATRIX(type, expr) \
494 am->matrix_## type[0] = av_mallocz(am->out_channels * am->in_channels * \
495 sizeof(*am->matrix_## type[0])); \
496 if (!am->matrix_## type[0]) \
497 return AVERROR(ENOMEM); \
498 for (o = 0; o < am->out_channels; o++) { \
500 am->matrix_## type[o] = am->matrix_## type[o - 1] + \
502 for (i = 0; i < am->in_channels; i++) { \
503 double v = matrix[o * stride + i]; \
504 am->matrix_## type[o][i] = expr; \
507 am->matrix = (void **)am->matrix_## type;
509 switch (am->coeff_type) {
510 case AV_MIX_COEFF_TYPE_Q8:
511 CONVERT_MATRIX(q8, av_clip_int16(lrint(256.0 * v)))
513 case AV_MIX_COEFF_TYPE_Q15:
514 CONVERT_MATRIX(q15, av_clipl_int32(llrint(32768.0 * v)))
516 case AV_MIX_COEFF_TYPE_FLT:
517 CONVERT_MATRIX(flt, v)
520 av_log(am, AV_LOG_ERROR, "Invalid mix coeff type\n");
521 return AVERROR(EINVAL);
524 /* TODO: detect situations where we can just swap around pointers
525 instead of doing matrix multiplications with 0.0 and 1.0 */