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path: root/libswresample/swresample.c (plain)
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1/*
2 * Copyright (C) 2011-2013 Michael Niedermayer (michaelni@gmx.at)
3 *
4 * This file is part of libswresample
5 *
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.
10 *
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.
15 *
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
19 */
20
21#include "libavutil/opt.h"
22#include "swresample_internal.h"
23#include "audioconvert.h"
24#include "libavutil/avassert.h"
25#include "libavutil/channel_layout.h"
26#include "libavutil/internal.h"
27
28#include <float.h>
29
30#define ALIGN 32
31
32#include "libavutil/ffversion.h"
33const char swr_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
34
35unsigned swresample_version(void)
36{
37 av_assert0(LIBSWRESAMPLE_VERSION_MICRO >= 100);
38 return LIBSWRESAMPLE_VERSION_INT;
39}
40
41const char *swresample_configuration(void)
42{
43 return FFMPEG_CONFIGURATION;
44}
45
46const char *swresample_license(void)
47{
48#define LICENSE_PREFIX "libswresample license: "
49 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
50}
51
52int swr_set_channel_mapping(struct SwrContext *s, const int *channel_map){
53 if(!s || s->in_convert) // s needs to be allocated but not initialized
54 return AVERROR(EINVAL);
55 s->channel_map = channel_map;
56 return 0;
57}
58
59struct SwrContext *swr_alloc_set_opts(struct SwrContext *s,
60 int64_t out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate,
61 int64_t in_ch_layout, enum AVSampleFormat in_sample_fmt, int in_sample_rate,
62 int log_offset, void *log_ctx){
63 if(!s) s= swr_alloc();
64 if(!s) return NULL;
65
66 s->log_level_offset= log_offset;
67 s->log_ctx= log_ctx;
68
69 if (av_opt_set_int(s, "ocl", out_ch_layout, 0) < 0)
70 goto fail;
71
72 if (av_opt_set_int(s, "osf", out_sample_fmt, 0) < 0)
73 goto fail;
74
75 if (av_opt_set_int(s, "osr", out_sample_rate, 0) < 0)
76 goto fail;
77
78 if (av_opt_set_int(s, "icl", in_ch_layout, 0) < 0)
79 goto fail;
80
81 if (av_opt_set_int(s, "isf", in_sample_fmt, 0) < 0)
82 goto fail;
83
84 if (av_opt_set_int(s, "isr", in_sample_rate, 0) < 0)
85 goto fail;
86
87 if (av_opt_set_int(s, "ich", av_get_channel_layout_nb_channels(s-> user_in_ch_layout), 0) < 0)
88 goto fail;
89
90 if (av_opt_set_int(s, "och", av_get_channel_layout_nb_channels(s->user_out_ch_layout), 0) < 0)
91 goto fail;
92
93 av_opt_set_int(s, "uch", 0, 0);
94 return s;
95fail:
96 av_log(s, AV_LOG_ERROR, "Failed to set option\n");
97 swr_free(&s);
98 return NULL;
99}
100
101static void set_audiodata_fmt(AudioData *a, enum AVSampleFormat fmt){
102 a->fmt = fmt;
103 a->bps = av_get_bytes_per_sample(fmt);
104 a->planar= av_sample_fmt_is_planar(fmt);
105 if (a->ch_count == 1)
106 a->planar = 1;
107}
108
109static void free_temp(AudioData *a){
110 av_free(a->data);
111 memset(a, 0, sizeof(*a));
112}
113
114static void clear_context(SwrContext *s){
115 s->in_buffer_index= 0;
116 s->in_buffer_count= 0;
117 s->resample_in_constraint= 0;
118 memset(s->in.ch, 0, sizeof(s->in.ch));
119 memset(s->out.ch, 0, sizeof(s->out.ch));
120 free_temp(&s->postin);
121 free_temp(&s->midbuf);
122 free_temp(&s->preout);
123 free_temp(&s->in_buffer);
124 free_temp(&s->silence);
125 free_temp(&s->drop_temp);
126 free_temp(&s->dither.noise);
127 free_temp(&s->dither.temp);
128 swri_audio_convert_free(&s-> in_convert);
129 swri_audio_convert_free(&s->out_convert);
130 swri_audio_convert_free(&s->full_convert);
131 swri_rematrix_free(s);
132
133 s->delayed_samples_fixup = 0;
134 s->flushed = 0;
135}
136
137av_cold void swr_free(SwrContext **ss){
138 SwrContext *s= *ss;
139 if(s){
140 clear_context(s);
141 if (s->resampler)
142 s->resampler->free(&s->resample);
143 }
144
145 av_freep(ss);
146}
147
148av_cold void swr_close(SwrContext *s){
149 clear_context(s);
150}
151
152av_cold int swr_init(struct SwrContext *s){
153 int ret;
154 char l1[1024], l2[1024];
155
156 clear_context(s);
157
158 if(s-> in_sample_fmt >= AV_SAMPLE_FMT_NB){
159 av_log(s, AV_LOG_ERROR, "Requested input sample format %d is invalid\n", s->in_sample_fmt);
160 return AVERROR(EINVAL);
161 }
162 if(s->out_sample_fmt >= AV_SAMPLE_FMT_NB){
163 av_log(s, AV_LOG_ERROR, "Requested output sample format %d is invalid\n", s->out_sample_fmt);
164 return AVERROR(EINVAL);
165 }
166
167 s->out.ch_count = s-> user_out_ch_count;
168 s-> in.ch_count = s-> user_in_ch_count;
169 s->used_ch_count = s->user_used_ch_count;
170
171 s-> in_ch_layout = s-> user_in_ch_layout;
172 s->out_ch_layout = s->user_out_ch_layout;
173
174 s->int_sample_fmt= s->user_int_sample_fmt;
175
176 s->dither.method = s->user_dither_method;
177
178 if(av_get_channel_layout_nb_channels(s-> in_ch_layout) > SWR_CH_MAX) {
179 av_log(s, AV_LOG_WARNING, "Input channel layout 0x%"PRIx64" is invalid or unsupported.\n", s-> in_ch_layout);
180 s->in_ch_layout = 0;
181 }
182
183 if(av_get_channel_layout_nb_channels(s->out_ch_layout) > SWR_CH_MAX) {
184 av_log(s, AV_LOG_WARNING, "Output channel layout 0x%"PRIx64" is invalid or unsupported.\n", s->out_ch_layout);
185 s->out_ch_layout = 0;
186 }
187
188 switch(s->engine){
189#if CONFIG_LIBSOXR
190 case SWR_ENGINE_SOXR: s->resampler = &swri_soxr_resampler; break;
191#endif
192 case SWR_ENGINE_SWR : s->resampler = &swri_resampler; break;
193 default:
194 av_log(s, AV_LOG_ERROR, "Requested resampling engine is unavailable\n");
195 return AVERROR(EINVAL);
196 }
197
198 if(!s->used_ch_count)
199 s->used_ch_count= s->in.ch_count;
200
201 if(s->used_ch_count && s-> in_ch_layout && s->used_ch_count != av_get_channel_layout_nb_channels(s-> in_ch_layout)){
202 av_log(s, AV_LOG_WARNING, "Input channel layout has a different number of channels than the number of used channels, ignoring layout\n");
203 s-> in_ch_layout= 0;
204 }
205
206 if(!s-> in_ch_layout)
207 s-> in_ch_layout= av_get_default_channel_layout(s->used_ch_count);
208 if(!s->out_ch_layout)
209 s->out_ch_layout= av_get_default_channel_layout(s->out.ch_count);
210
211 s->rematrix= s->out_ch_layout !=s->in_ch_layout || s->rematrix_volume!=1.0 ||
212 s->rematrix_custom;
213
214 if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){
215 if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
216 && av_get_bytes_per_sample(s->out_sample_fmt) <= 2){
217 s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
218 }else if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
219 && !s->rematrix
220 && s->out_sample_rate==s->in_sample_rate
221 && !(s->flags & SWR_FLAG_RESAMPLE)){
222 s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
223 }else if( av_get_planar_sample_fmt(s-> in_sample_fmt) == AV_SAMPLE_FMT_S32P
224 && av_get_planar_sample_fmt(s->out_sample_fmt) == AV_SAMPLE_FMT_S32P
225 && !s->rematrix
226 && s->out_sample_rate == s->in_sample_rate
227 && !(s->flags & SWR_FLAG_RESAMPLE)
228 && s->engine != SWR_ENGINE_SOXR){
229 s->int_sample_fmt= AV_SAMPLE_FMT_S32P;
230 }else if(av_get_bytes_per_sample(s->in_sample_fmt) <= 4){
231 s->int_sample_fmt= AV_SAMPLE_FMT_FLTP;
232 }else{
233 s->int_sample_fmt= AV_SAMPLE_FMT_DBLP;
234 }
235 }
236 av_log(s, AV_LOG_DEBUG, "Using %s internally between filters\n", av_get_sample_fmt_name(s->int_sample_fmt));
237
238 if( s->int_sample_fmt != AV_SAMPLE_FMT_S16P
239 &&s->int_sample_fmt != AV_SAMPLE_FMT_S32P
240 &&s->int_sample_fmt != AV_SAMPLE_FMT_S64P
241 &&s->int_sample_fmt != AV_SAMPLE_FMT_FLTP
242 &&s->int_sample_fmt != AV_SAMPLE_FMT_DBLP){
243 av_log(s, AV_LOG_ERROR, "Requested sample format %s is not supported internally, S16/S32/S64/FLT/DBL is supported\n", av_get_sample_fmt_name(s->int_sample_fmt));
244 return AVERROR(EINVAL);
245 }
246
247 set_audiodata_fmt(&s-> in, s-> in_sample_fmt);
248 set_audiodata_fmt(&s->out, s->out_sample_fmt);
249
250 if (s->firstpts_in_samples != AV_NOPTS_VALUE) {
251 if (!s->async && s->min_compensation >= FLT_MAX/2)
252 s->async = 1;
253 s->firstpts =
254 s->outpts = s->firstpts_in_samples * s->out_sample_rate;
255 } else
256 s->firstpts = AV_NOPTS_VALUE;
257
258 if (s->async) {
259 if (s->min_compensation >= FLT_MAX/2)
260 s->min_compensation = 0.001;
261 if (s->async > 1.0001) {
262 s->max_soft_compensation = s->async / (double) s->in_sample_rate;
263 }
264 }
265
266 if (s->out_sample_rate!=s->in_sample_rate || (s->flags & SWR_FLAG_RESAMPLE)){
267 s->resample = s->resampler->init(s->resample, s->out_sample_rate, s->in_sample_rate, s->filter_size, s->phase_shift, s->linear_interp, s->cutoff, s->int_sample_fmt, s->filter_type, s->kaiser_beta, s->precision, s->cheby, s->exact_rational);
268 if (!s->resample) {
269 av_log(s, AV_LOG_ERROR, "Failed to initialize resampler\n");
270 return AVERROR(ENOMEM);
271 }
272 }else
273 s->resampler->free(&s->resample);
274 if( s->int_sample_fmt != AV_SAMPLE_FMT_S16P
275 && s->int_sample_fmt != AV_SAMPLE_FMT_S32P
276 && s->int_sample_fmt != AV_SAMPLE_FMT_FLTP
277 && s->int_sample_fmt != AV_SAMPLE_FMT_DBLP
278 && s->resample){
279 av_log(s, AV_LOG_ERROR, "Resampling only supported with internal s16/s32/flt/dbl\n");
280 ret = AVERROR(EINVAL);
281 goto fail;
282 }
283
284#define RSC 1 //FIXME finetune
285 if(!s-> in.ch_count)
286 s-> in.ch_count= av_get_channel_layout_nb_channels(s-> in_ch_layout);
287 if(!s->used_ch_count)
288 s->used_ch_count= s->in.ch_count;
289 if(!s->out.ch_count)
290 s->out.ch_count= av_get_channel_layout_nb_channels(s->out_ch_layout);
291
292 if(!s-> in.ch_count){
293 av_assert0(!s->in_ch_layout);
294 av_log(s, AV_LOG_ERROR, "Input channel count and layout are unset\n");
295 ret = AVERROR(EINVAL);
296 goto fail;
297 }
298
299 av_get_channel_layout_string(l1, sizeof(l1), s-> in.ch_count, s-> in_ch_layout);
300 av_get_channel_layout_string(l2, sizeof(l2), s->out.ch_count, s->out_ch_layout);
301 if (s->out_ch_layout && s->out.ch_count != av_get_channel_layout_nb_channels(s->out_ch_layout)) {
302 av_log(s, AV_LOG_ERROR, "Output channel layout %s mismatches specified channel count %d\n", l2, s->out.ch_count);
303 ret = AVERROR(EINVAL);
304 goto fail;
305 }
306 if (s->in_ch_layout && s->used_ch_count != av_get_channel_layout_nb_channels(s->in_ch_layout)) {
307 av_log(s, AV_LOG_ERROR, "Input channel layout %s mismatches specified channel count %d\n", l1, s->used_ch_count);
308 ret = AVERROR(EINVAL);
309 goto fail;
310 }
311
312 if ((!s->out_ch_layout || !s->in_ch_layout) && s->used_ch_count != s->out.ch_count && !s->rematrix_custom) {
313 av_log(s, AV_LOG_ERROR, "Rematrix is needed between %s and %s "
314 "but there is not enough information to do it\n", l1, l2);
315 ret = AVERROR(EINVAL);
316 goto fail;
317 }
318
319av_assert0(s->used_ch_count);
320av_assert0(s->out.ch_count);
321 s->resample_first= RSC*s->out.ch_count/s->in.ch_count - RSC < s->out_sample_rate/(float)s-> in_sample_rate - 1.0;
322
323 s->in_buffer= s->in;
324 s->silence = s->in;
325 s->drop_temp= s->out;
326
327 if ((ret = swri_dither_init(s, s->out_sample_fmt, s->int_sample_fmt)) < 0)
328 goto fail;
329
330 if(!s->resample && !s->rematrix && !s->channel_map && !s->dither.method){
331 s->full_convert = swri_audio_convert_alloc(s->out_sample_fmt,
332 s-> in_sample_fmt, s-> in.ch_count, NULL, 0);
333 return 0;
334 }
335
336 s->in_convert = swri_audio_convert_alloc(s->int_sample_fmt,
337 s-> in_sample_fmt, s->used_ch_count, s->channel_map, 0);
338 s->out_convert= swri_audio_convert_alloc(s->out_sample_fmt,
339 s->int_sample_fmt, s->out.ch_count, NULL, 0);
340
341 if (!s->in_convert || !s->out_convert) {
342 ret = AVERROR(ENOMEM);
343 goto fail;
344 }
345
346 s->postin= s->in;
347 s->preout= s->out;
348 s->midbuf= s->in;
349
350 if(s->channel_map){
351 s->postin.ch_count=
352 s->midbuf.ch_count= s->used_ch_count;
353 if(s->resample)
354 s->in_buffer.ch_count= s->used_ch_count;
355 }
356 if(!s->resample_first){
357 s->midbuf.ch_count= s->out.ch_count;
358 if(s->resample)
359 s->in_buffer.ch_count = s->out.ch_count;
360 }
361
362 set_audiodata_fmt(&s->postin, s->int_sample_fmt);
363 set_audiodata_fmt(&s->midbuf, s->int_sample_fmt);
364 set_audiodata_fmt(&s->preout, s->int_sample_fmt);
365
366 if(s->resample){
367 set_audiodata_fmt(&s->in_buffer, s->int_sample_fmt);
368 }
369
370 av_assert0(!s->preout.count);
371 s->dither.noise = s->preout;
372 s->dither.temp = s->preout;
373 if (s->dither.method > SWR_DITHER_NS) {
374 s->dither.noise.bps = 4;
375 s->dither.noise.fmt = AV_SAMPLE_FMT_FLTP;
376 s->dither.noise_scale = 1;
377 }
378
379 if(s->rematrix || s->dither.method) {
380 ret = swri_rematrix_init(s);
381 if (ret < 0)
382 goto fail;
383 }
384
385 return 0;
386fail:
387 swr_close(s);
388 return ret;
389
390}
391
392int swri_realloc_audio(AudioData *a, int count){
393 int i, countb;
394 AudioData old;
395
396 if(count < 0 || count > INT_MAX/2/a->bps/a->ch_count)
397 return AVERROR(EINVAL);
398
399 if(a->count >= count)
400 return 0;
401
402 count*=2;
403
404 countb= FFALIGN(count*a->bps, ALIGN);
405 old= *a;
406
407 av_assert0(a->bps);
408 av_assert0(a->ch_count);
409
410 a->data= av_mallocz_array(countb, a->ch_count);
411 if(!a->data)
412 return AVERROR(ENOMEM);
413 for(i=0; i<a->ch_count; i++){
414 a->ch[i]= a->data + i*(a->planar ? countb : a->bps);
415 if(a->count && a->planar) memcpy(a->ch[i], old.ch[i], a->count*a->bps);
416 }
417 if(a->count && !a->planar) memcpy(a->ch[0], old.ch[0], a->count*a->ch_count*a->bps);
418 av_freep(&old.data);
419 a->count= count;
420
421 return 1;
422}
423
424static void copy(AudioData *out, AudioData *in,
425 int count){
426 av_assert0(out->planar == in->planar);
427 av_assert0(out->bps == in->bps);
428 av_assert0(out->ch_count == in->ch_count);
429 if(out->planar){
430 int ch;
431 for(ch=0; ch<out->ch_count; ch++)
432 memcpy(out->ch[ch], in->ch[ch], count*out->bps);
433 }else
434 memcpy(out->ch[0], in->ch[0], count*out->ch_count*out->bps);
435}
436
437static void fill_audiodata(AudioData *out, uint8_t *in_arg [SWR_CH_MAX]){
438 int i;
439 if(!in_arg){
440 memset(out->ch, 0, sizeof(out->ch));
441 }else if(out->planar){
442 for(i=0; i<out->ch_count; i++)
443 out->ch[i]= in_arg[i];
444 }else{
445 for(i=0; i<out->ch_count; i++)
446 out->ch[i]= in_arg[0] + i*out->bps;
447 }
448}
449
450static void reversefill_audiodata(AudioData *out, uint8_t *in_arg [SWR_CH_MAX]){
451 int i;
452 if(out->planar){
453 for(i=0; i<out->ch_count; i++)
454 in_arg[i]= out->ch[i];
455 }else{
456 in_arg[0]= out->ch[0];
457 }
458}
459
460/**
461 *
462 * out may be equal in.
463 */
464static void buf_set(AudioData *out, AudioData *in, int count){
465 int ch;
466 if(in->planar){
467 for(ch=0; ch<out->ch_count; ch++)
468 out->ch[ch]= in->ch[ch] + count*out->bps;
469 }else{
470 for(ch=out->ch_count-1; ch>=0; ch--)
471 out->ch[ch]= in->ch[0] + (ch + count*out->ch_count) * out->bps;
472 }
473}
474
475/**
476 *
477 * @return number of samples output per channel
478 */
479static int resample(SwrContext *s, AudioData *out_param, int out_count,
480 const AudioData * in_param, int in_count){
481 AudioData in, out, tmp;
482 int ret_sum=0;
483 int border=0;
484 int padless = ARCH_X86 && s->engine == SWR_ENGINE_SWR ? 7 : 0;
485
486 av_assert1(s->in_buffer.ch_count == in_param->ch_count);
487 av_assert1(s->in_buffer.planar == in_param->planar);
488 av_assert1(s->in_buffer.fmt == in_param->fmt);
489
490 tmp=out=*out_param;
491 in = *in_param;
492
493 border = s->resampler->invert_initial_buffer(s->resample, &s->in_buffer,
494 &in, in_count, &s->in_buffer_index, &s->in_buffer_count);
495 if (border == INT_MAX) {
496 return 0;
497 } else if (border < 0) {
498 return border;
499 } else if (border) {
500 buf_set(&in, &in, border);
501 in_count -= border;
502 s->resample_in_constraint = 0;
503 }
504
505 do{
506 int ret, size, consumed;
507 if(!s->resample_in_constraint && s->in_buffer_count){
508 buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
509 ret= s->resampler->multiple_resample(s->resample, &out, out_count, &tmp, s->in_buffer_count, &consumed);
510 out_count -= ret;
511 ret_sum += ret;
512 buf_set(&out, &out, ret);
513 s->in_buffer_count -= consumed;
514 s->in_buffer_index += consumed;
515
516 if(!in_count)
517 break;
518 if(s->in_buffer_count <= border){
519 buf_set(&in, &in, -s->in_buffer_count);
520 in_count += s->in_buffer_count;
521 s->in_buffer_count=0;
522 s->in_buffer_index=0;
523 border = 0;
524 }
525 }
526
527 if((s->flushed || in_count > padless) && !s->in_buffer_count){
528 s->in_buffer_index=0;
529 ret= s->resampler->multiple_resample(s->resample, &out, out_count, &in, FFMAX(in_count-padless, 0), &consumed);
530 out_count -= ret;
531 ret_sum += ret;
532 buf_set(&out, &out, ret);
533 in_count -= consumed;
534 buf_set(&in, &in, consumed);
535 }
536
537 //TODO is this check sane considering the advanced copy avoidance below
538 size= s->in_buffer_index + s->in_buffer_count + in_count;
539 if( size > s->in_buffer.count
540 && s->in_buffer_count + in_count <= s->in_buffer_index){
541 buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
542 copy(&s->in_buffer, &tmp, s->in_buffer_count);
543 s->in_buffer_index=0;
544 }else
545 if((ret=swri_realloc_audio(&s->in_buffer, size)) < 0)
546 return ret;
547
548 if(in_count){
549 int count= in_count;
550 if(s->in_buffer_count && s->in_buffer_count+2 < count && out_count) count= s->in_buffer_count+2;
551
552 buf_set(&tmp, &s->in_buffer, s->in_buffer_index + s->in_buffer_count);
553 copy(&tmp, &in, /*in_*/count);
554 s->in_buffer_count += count;
555 in_count -= count;
556 border += count;
557 buf_set(&in, &in, count);
558 s->resample_in_constraint= 0;
559 if(s->in_buffer_count != count || in_count)
560 continue;
561 if (padless) {
562 padless = 0;
563 continue;
564 }
565 }
566 break;
567 }while(1);
568
569 s->resample_in_constraint= !!out_count;
570
571 return ret_sum;
572}
573
574static int swr_convert_internal(struct SwrContext *s, AudioData *out, int out_count,
575 AudioData *in , int in_count){
576 AudioData *postin, *midbuf, *preout;
577 int ret/*, in_max*/;
578 AudioData preout_tmp, midbuf_tmp;
579
580 if(s->full_convert){
581 av_assert0(!s->resample);
582 swri_audio_convert(s->full_convert, out, in, in_count);
583 return out_count;
584 }
585
586// in_max= out_count*(int64_t)s->in_sample_rate / s->out_sample_rate + resample_filter_taps;
587// in_count= FFMIN(in_count, in_in + 2 - s->hist_buffer_count);
588
589 if((ret=swri_realloc_audio(&s->postin, in_count))<0)
590 return ret;
591 if(s->resample_first){
592 av_assert0(s->midbuf.ch_count == s->used_ch_count);
593 if((ret=swri_realloc_audio(&s->midbuf, out_count))<0)
594 return ret;
595 }else{
596 av_assert0(s->midbuf.ch_count == s->out.ch_count);
597 if((ret=swri_realloc_audio(&s->midbuf, in_count))<0)
598 return ret;
599 }
600 if((ret=swri_realloc_audio(&s->preout, out_count))<0)
601 return ret;
602
603 postin= &s->postin;
604
605 midbuf_tmp= s->midbuf;
606 midbuf= &midbuf_tmp;
607 preout_tmp= s->preout;
608 preout= &preout_tmp;
609
610 if(s->int_sample_fmt == s-> in_sample_fmt && s->in.planar && !s->channel_map)
611 postin= in;
612
613 if(s->resample_first ? !s->resample : !s->rematrix)
614 midbuf= postin;
615
616 if(s->resample_first ? !s->rematrix : !s->resample)
617 preout= midbuf;
618
619 if(s->int_sample_fmt == s->out_sample_fmt && s->out.planar
620 && !(s->out_sample_fmt==AV_SAMPLE_FMT_S32P && (s->dither.output_sample_bits&31))){
621 if(preout==in){
622 out_count= FFMIN(out_count, in_count); //TODO check at the end if this is needed or redundant
623 av_assert0(s->in.planar); //we only support planar internally so it has to be, we support copying non planar though
624 copy(out, in, out_count);
625 return out_count;
626 }
627 else if(preout==postin) preout= midbuf= postin= out;
628 else if(preout==midbuf) preout= midbuf= out;
629 else preout= out;
630 }
631
632 if(in != postin){
633 swri_audio_convert(s->in_convert, postin, in, in_count);
634 }
635
636 if(s->resample_first){
637 if(postin != midbuf)
638 out_count= resample(s, midbuf, out_count, postin, in_count);
639 if(midbuf != preout)
640 swri_rematrix(s, preout, midbuf, out_count, preout==out);
641 }else{
642 if(postin != midbuf)
643 swri_rematrix(s, midbuf, postin, in_count, midbuf==out);
644 if(midbuf != preout)
645 out_count= resample(s, preout, out_count, midbuf, in_count);
646 }
647
648 if(preout != out && out_count){
649 AudioData *conv_src = preout;
650 if(s->dither.method){
651 int ch;
652 int dither_count= FFMAX(out_count, 1<<16);
653
654 if (preout == in) {
655 conv_src = &s->dither.temp;
656 if((ret=swri_realloc_audio(&s->dither.temp, dither_count))<0)
657 return ret;
658 }
659
660 if((ret=swri_realloc_audio(&s->dither.noise, dither_count))<0)
661 return ret;
662 if(ret)
663 for(ch=0; ch<s->dither.noise.ch_count; ch++)
664 if((ret=swri_get_dither(s, s->dither.noise.ch[ch], s->dither.noise.count, (12345678913579ULL*ch + 3141592) % 2718281828U, s->dither.noise.fmt))<0)
665 return ret;
666 av_assert0(s->dither.noise.ch_count == preout->ch_count);
667
668 if(s->dither.noise_pos + out_count > s->dither.noise.count)
669 s->dither.noise_pos = 0;
670
671 if (s->dither.method < SWR_DITHER_NS){
672 if (s->mix_2_1_simd) {
673 int len1= out_count&~15;
674 int off = len1 * preout->bps;
675
676 if(len1)
677 for(ch=0; ch<preout->ch_count; ch++)
678 s->mix_2_1_simd(conv_src->ch[ch], preout->ch[ch], s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos, s->native_simd_one, 0, 0, len1);
679 if(out_count != len1)
680 for(ch=0; ch<preout->ch_count; ch++)
681 s->mix_2_1_f(conv_src->ch[ch] + off, preout->ch[ch] + off, s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos + off + len1, s->native_one, 0, 0, out_count - len1);
682 } else {
683 for(ch=0; ch<preout->ch_count; ch++)
684 s->mix_2_1_f(conv_src->ch[ch], preout->ch[ch], s->dither.noise.ch[ch] + s->dither.noise.bps * s->dither.noise_pos, s->native_one, 0, 0, out_count);
685 }
686 } else {
687 switch(s->int_sample_fmt) {
688 case AV_SAMPLE_FMT_S16P :swri_noise_shaping_int16(s, conv_src, preout, &s->dither.noise, out_count); break;
689 case AV_SAMPLE_FMT_S32P :swri_noise_shaping_int32(s, conv_src, preout, &s->dither.noise, out_count); break;
690 case AV_SAMPLE_FMT_FLTP :swri_noise_shaping_float(s, conv_src, preout, &s->dither.noise, out_count); break;
691 case AV_SAMPLE_FMT_DBLP :swri_noise_shaping_double(s,conv_src, preout, &s->dither.noise, out_count); break;
692 }
693 }
694 s->dither.noise_pos += out_count;
695 }
696//FIXME packed doesn't need more than 1 chan here!
697 swri_audio_convert(s->out_convert, out, conv_src, out_count);
698 }
699 return out_count;
700}
701
702int swr_is_initialized(struct SwrContext *s) {
703 return !!s->in_buffer.ch_count;
704}
705
706int attribute_align_arg swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_count,
707 const uint8_t *in_arg [SWR_CH_MAX], int in_count){
708 AudioData * in= &s->in;
709 AudioData *out= &s->out;
710 int av_unused max_output;
711
712 if (!swr_is_initialized(s)) {
713 av_log(s, AV_LOG_ERROR, "Context has not been initialized\n");
714 return AVERROR(EINVAL);
715 }
716#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >1
717 max_output = swr_get_out_samples(s, in_count);
718#endif
719
720 while(s->drop_output > 0){
721 int ret;
722 uint8_t *tmp_arg[SWR_CH_MAX];
723#define MAX_DROP_STEP 16384
724 if((ret=swri_realloc_audio(&s->drop_temp, FFMIN(s->drop_output, MAX_DROP_STEP)))<0)
725 return ret;
726
727 reversefill_audiodata(&s->drop_temp, tmp_arg);
728 s->drop_output *= -1; //FIXME find a less hackish solution
729 ret = swr_convert(s, tmp_arg, FFMIN(-s->drop_output, MAX_DROP_STEP), in_arg, in_count); //FIXME optimize but this is as good as never called so maybe it doesn't matter
730 s->drop_output *= -1;
731 in_count = 0;
732 if(ret>0) {
733 s->drop_output -= ret;
734 if (!s->drop_output && !out_arg)
735 return 0;
736 continue;
737 }
738
739 av_assert0(s->drop_output);
740 return 0;
741 }
742
743 if(!in_arg){
744 if(s->resample){
745 if (!s->flushed)
746 s->resampler->flush(s);
747 s->resample_in_constraint = 0;
748 s->flushed = 1;
749 }else if(!s->in_buffer_count){
750 return 0;
751 }
752 }else
753 fill_audiodata(in , (void*)in_arg);
754
755 fill_audiodata(out, out_arg);
756
757 if(s->resample){
758 int ret = swr_convert_internal(s, out, out_count, in, in_count);
759 if(ret>0 && !s->drop_output)
760 s->outpts += ret * (int64_t)s->in_sample_rate;
761
762 av_assert2(max_output < 0 || ret < 0 || ret <= max_output);
763
764 return ret;
765 }else{
766 AudioData tmp= *in;
767 int ret2=0;
768 int ret, size;
769 size = FFMIN(out_count, s->in_buffer_count);
770 if(size){
771 buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
772 ret= swr_convert_internal(s, out, size, &tmp, size);
773 if(ret<0)
774 return ret;
775 ret2= ret;
776 s->in_buffer_count -= ret;
777 s->in_buffer_index += ret;
778 buf_set(out, out, ret);
779 out_count -= ret;
780 if(!s->in_buffer_count)
781 s->in_buffer_index = 0;
782 }
783
784 if(in_count){
785 size= s->in_buffer_index + s->in_buffer_count + in_count - out_count;
786
787 if(in_count > out_count) { //FIXME move after swr_convert_internal
788 if( size > s->in_buffer.count
789 && s->in_buffer_count + in_count - out_count <= s->in_buffer_index){
790 buf_set(&tmp, &s->in_buffer, s->in_buffer_index);
791 copy(&s->in_buffer, &tmp, s->in_buffer_count);
792 s->in_buffer_index=0;
793 }else
794 if((ret=swri_realloc_audio(&s->in_buffer, size)) < 0)
795 return ret;
796 }
797
798 if(out_count){
799 size = FFMIN(in_count, out_count);
800 ret= swr_convert_internal(s, out, size, in, size);
801 if(ret<0)
802 return ret;
803 buf_set(in, in, ret);
804 in_count -= ret;
805 ret2 += ret;
806 }
807 if(in_count){
808 buf_set(&tmp, &s->in_buffer, s->in_buffer_index + s->in_buffer_count);
809 copy(&tmp, in, in_count);
810 s->in_buffer_count += in_count;
811 }
812 }
813 if(ret2>0 && !s->drop_output)
814 s->outpts += ret2 * (int64_t)s->in_sample_rate;
815 av_assert2(max_output < 0 || ret2 < 0 || ret2 <= max_output);
816 return ret2;
817 }
818}
819
820int swr_drop_output(struct SwrContext *s, int count){
821 const uint8_t *tmp_arg[SWR_CH_MAX];
822 s->drop_output += count;
823
824 if(s->drop_output <= 0)
825 return 0;
826
827 av_log(s, AV_LOG_VERBOSE, "discarding %d audio samples\n", count);
828 return swr_convert(s, NULL, s->drop_output, tmp_arg, 0);
829}
830
831int swr_inject_silence(struct SwrContext *s, int count){
832 int ret, i;
833 uint8_t *tmp_arg[SWR_CH_MAX];
834
835 if(count <= 0)
836 return 0;
837
838#define MAX_SILENCE_STEP 16384
839 while (count > MAX_SILENCE_STEP) {
840 if ((ret = swr_inject_silence(s, MAX_SILENCE_STEP)) < 0)
841 return ret;
842 count -= MAX_SILENCE_STEP;
843 }
844
845 if((ret=swri_realloc_audio(&s->silence, count))<0)
846 return ret;
847
848 if(s->silence.planar) for(i=0; i<s->silence.ch_count; i++) {
849 memset(s->silence.ch[i], s->silence.bps==1 ? 0x80 : 0, count*s->silence.bps);
850 } else
851 memset(s->silence.ch[0], s->silence.bps==1 ? 0x80 : 0, count*s->silence.bps*s->silence.ch_count);
852
853 reversefill_audiodata(&s->silence, tmp_arg);
854 av_log(s, AV_LOG_VERBOSE, "adding %d audio samples of silence\n", count);
855 ret = swr_convert(s, NULL, 0, (const uint8_t**)tmp_arg, count);
856 return ret;
857}
858
859int64_t swr_get_delay(struct SwrContext *s, int64_t base){
860 if (s->resampler && s->resample){
861 return s->resampler->get_delay(s, base);
862 }else{
863 return (s->in_buffer_count*base + (s->in_sample_rate>>1))/ s->in_sample_rate;
864 }
865}
866
867int swr_get_out_samples(struct SwrContext *s, int in_samples)
868{
869 int64_t out_samples;
870
871 if (in_samples < 0)
872 return AVERROR(EINVAL);
873
874 if (s->resampler && s->resample) {
875 if (!s->resampler->get_out_samples)
876 return AVERROR(ENOSYS);
877 out_samples = s->resampler->get_out_samples(s, in_samples);
878 } else {
879 out_samples = s->in_buffer_count + in_samples;
880 av_assert0(s->out_sample_rate == s->in_sample_rate);
881 }
882
883 if (out_samples > INT_MAX)
884 return AVERROR(EINVAL);
885
886 return out_samples;
887}
888
889int swr_set_compensation(struct SwrContext *s, int sample_delta, int compensation_distance){
890 int ret;
891
892 if (!s || compensation_distance < 0)
893 return AVERROR(EINVAL);
894 if (!compensation_distance && sample_delta)
895 return AVERROR(EINVAL);
896 if (!s->resample) {
897 s->flags |= SWR_FLAG_RESAMPLE;
898 ret = swr_init(s);
899 if (ret < 0)
900 return ret;
901 }
902 if (!s->resampler->set_compensation){
903 return AVERROR(EINVAL);
904 }else{
905 return s->resampler->set_compensation(s->resample, sample_delta, compensation_distance);
906 }
907}
908
909int64_t swr_next_pts(struct SwrContext *s, int64_t pts){
910 if(pts == INT64_MIN)
911 return s->outpts;
912
913 if (s->firstpts == AV_NOPTS_VALUE)
914 s->outpts = s->firstpts = pts;
915
916 if(s->min_compensation >= FLT_MAX) {
917 return (s->outpts = pts - swr_get_delay(s, s->in_sample_rate * (int64_t)s->out_sample_rate));
918 } else {
919 int64_t delta = pts - swr_get_delay(s, s->in_sample_rate * (int64_t)s->out_sample_rate) - s->outpts + s->drop_output*(int64_t)s->in_sample_rate;
920 double fdelta = delta /(double)(s->in_sample_rate * (int64_t)s->out_sample_rate);
921
922 if(fabs(fdelta) > s->min_compensation) {
923 if(s->outpts == s->firstpts || fabs(fdelta) > s->min_hard_compensation){
924 int ret;
925 if(delta > 0) ret = swr_inject_silence(s, delta / s->out_sample_rate);
926 else ret = swr_drop_output (s, -delta / s-> in_sample_rate);
927 if(ret<0){
928 av_log(s, AV_LOG_ERROR, "Failed to compensate for timestamp delta of %f\n", fdelta);
929 }
930 } else if(s->soft_compensation_duration && s->max_soft_compensation) {
931 int duration = s->out_sample_rate * s->soft_compensation_duration;
932 double max_soft_compensation = s->max_soft_compensation / (s->max_soft_compensation < 0 ? -s->in_sample_rate : 1);
933 int comp = av_clipf(fdelta, -max_soft_compensation, max_soft_compensation) * duration ;
934 av_log(s, AV_LOG_VERBOSE, "compensating audio timestamp drift:%f compensation:%d in:%d\n", fdelta, comp, duration);
935 swr_set_compensation(s, comp, duration);
936 }
937 }
938
939 return s->outpts;
940 }
941}
942
generated by cgit at 2024-05-17 06:08:44 (GMT)