Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavresample / utils.c
CommitLineData
2ba45a60
DM
1/*
2 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/common.h"
22#include "libavutil/dict.h"
23// #include "libavutil/error.h"
24#include "libavutil/frame.h"
25#include "libavutil/log.h"
26#include "libavutil/mem.h"
27#include "libavutil/opt.h"
28
29#include "avresample.h"
30#include "internal.h"
31#include "audio_data.h"
32#include "audio_convert.h"
33#include "audio_mix.h"
34#include "resample.h"
35
36int avresample_open(AVAudioResampleContext *avr)
37{
38 int ret;
39
40 if (avresample_is_open(avr)) {
41 av_log(avr, AV_LOG_ERROR, "The resampling context is already open.\n");
42 return AVERROR(EINVAL);
43 }
44
45 /* set channel mixing parameters */
46 avr->in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
47 if (avr->in_channels <= 0 || avr->in_channels > AVRESAMPLE_MAX_CHANNELS) {
48 av_log(avr, AV_LOG_ERROR, "Invalid input channel layout: %"PRIu64"\n",
49 avr->in_channel_layout);
50 return AVERROR(EINVAL);
51 }
52 avr->out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
53 if (avr->out_channels <= 0 || avr->out_channels > AVRESAMPLE_MAX_CHANNELS) {
54 av_log(avr, AV_LOG_ERROR, "Invalid output channel layout: %"PRIu64"\n",
55 avr->out_channel_layout);
56 return AVERROR(EINVAL);
57 }
58 avr->resample_channels = FFMIN(avr->in_channels, avr->out_channels);
59 avr->downmix_needed = avr->in_channels > avr->out_channels;
60 avr->upmix_needed = avr->out_channels > avr->in_channels ||
61 (!avr->downmix_needed && (avr->mix_matrix ||
62 avr->in_channel_layout != avr->out_channel_layout));
63 avr->mixing_needed = avr->downmix_needed || avr->upmix_needed;
64
65 /* set resampling parameters */
66 avr->resample_needed = avr->in_sample_rate != avr->out_sample_rate ||
67 avr->force_resampling;
68
69 /* select internal sample format if not specified by the user */
70 if (avr->internal_sample_fmt == AV_SAMPLE_FMT_NONE &&
71 (avr->mixing_needed || avr->resample_needed)) {
72 enum AVSampleFormat in_fmt = av_get_planar_sample_fmt(avr->in_sample_fmt);
73 enum AVSampleFormat out_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt);
74 int max_bps = FFMAX(av_get_bytes_per_sample(in_fmt),
75 av_get_bytes_per_sample(out_fmt));
76 if (max_bps <= 2) {
77 avr->internal_sample_fmt = AV_SAMPLE_FMT_S16P;
78 } else if (avr->mixing_needed) {
79 avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP;
80 } else {
81 if (max_bps <= 4) {
82 if (in_fmt == AV_SAMPLE_FMT_S32P ||
83 out_fmt == AV_SAMPLE_FMT_S32P) {
84 if (in_fmt == AV_SAMPLE_FMT_FLTP ||
85 out_fmt == AV_SAMPLE_FMT_FLTP) {
86 /* if one is s32 and the other is flt, use dbl */
87 avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP;
88 } else {
89 /* if one is s32 and the other is s32, s16, or u8, use s32 */
90 avr->internal_sample_fmt = AV_SAMPLE_FMT_S32P;
91 }
92 } else {
93 /* if one is flt and the other is flt, s16 or u8, use flt */
94 avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP;
95 }
96 } else {
97 /* if either is dbl, use dbl */
98 avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP;
99 }
100 }
101 av_log(avr, AV_LOG_DEBUG, "Using %s as internal sample format\n",
102 av_get_sample_fmt_name(avr->internal_sample_fmt));
103 }
104
105 /* we may need to add an extra conversion in order to remap channels if
106 the output format is not planar */
107 if (avr->use_channel_map && !avr->mixing_needed && !avr->resample_needed &&
108 !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels)) {
109 avr->internal_sample_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt);
110 }
111
112 /* set sample format conversion parameters */
113 if (avr->resample_needed || avr->mixing_needed)
114 avr->in_convert_needed = avr->in_sample_fmt != avr->internal_sample_fmt;
115 else
116 avr->in_convert_needed = avr->use_channel_map &&
117 !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels);
118
119 if (avr->resample_needed || avr->mixing_needed || avr->in_convert_needed)
120 avr->out_convert_needed = avr->internal_sample_fmt != avr->out_sample_fmt;
121 else
122 avr->out_convert_needed = avr->in_sample_fmt != avr->out_sample_fmt;
123
124 avr->in_copy_needed = !avr->in_convert_needed && (avr->mixing_needed ||
125 (avr->use_channel_map && avr->resample_needed));
126
127 if (avr->use_channel_map) {
128 if (avr->in_copy_needed) {
129 avr->remap_point = REMAP_IN_COPY;
130 av_dlog(avr, "remap channels during in_copy\n");
131 } else if (avr->in_convert_needed) {
132 avr->remap_point = REMAP_IN_CONVERT;
133 av_dlog(avr, "remap channels during in_convert\n");
134 } else if (avr->out_convert_needed) {
135 avr->remap_point = REMAP_OUT_CONVERT;
136 av_dlog(avr, "remap channels during out_convert\n");
137 } else {
138 avr->remap_point = REMAP_OUT_COPY;
139 av_dlog(avr, "remap channels during out_copy\n");
140 }
141
142#ifdef DEBUG
143 {
144 int ch;
145 av_dlog(avr, "output map: ");
146 if (avr->ch_map_info.do_remap)
147 for (ch = 0; ch < avr->in_channels; ch++)
148 av_dlog(avr, " % 2d", avr->ch_map_info.channel_map[ch]);
149 else
150 av_dlog(avr, "n/a");
151 av_dlog(avr, "\n");
152 av_dlog(avr, "copy map: ");
153 if (avr->ch_map_info.do_copy)
154 for (ch = 0; ch < avr->in_channels; ch++)
155 av_dlog(avr, " % 2d", avr->ch_map_info.channel_copy[ch]);
156 else
157 av_dlog(avr, "n/a");
158 av_dlog(avr, "\n");
159 av_dlog(avr, "zero map: ");
160 if (avr->ch_map_info.do_zero)
161 for (ch = 0; ch < avr->in_channels; ch++)
162 av_dlog(avr, " % 2d", avr->ch_map_info.channel_zero[ch]);
163 else
164 av_dlog(avr, "n/a");
165 av_dlog(avr, "\n");
166 av_dlog(avr, "input map: ");
167 for (ch = 0; ch < avr->in_channels; ch++)
168 av_dlog(avr, " % 2d", avr->ch_map_info.input_map[ch]);
169 av_dlog(avr, "\n");
170 }
171#endif
172 } else
173 avr->remap_point = REMAP_NONE;
174
175 /* allocate buffers */
176 if (avr->in_copy_needed || avr->in_convert_needed) {
177 avr->in_buffer = ff_audio_data_alloc(FFMAX(avr->in_channels, avr->out_channels),
178 0, avr->internal_sample_fmt,
179 "in_buffer");
180 if (!avr->in_buffer) {
181 ret = AVERROR(EINVAL);
182 goto error;
183 }
184 }
185 if (avr->resample_needed) {
186 avr->resample_out_buffer = ff_audio_data_alloc(avr->out_channels,
187 1024, avr->internal_sample_fmt,
188 "resample_out_buffer");
189 if (!avr->resample_out_buffer) {
190 ret = AVERROR(EINVAL);
191 goto error;
192 }
193 }
194 if (avr->out_convert_needed) {
195 avr->out_buffer = ff_audio_data_alloc(avr->out_channels, 0,
196 avr->out_sample_fmt, "out_buffer");
197 if (!avr->out_buffer) {
198 ret = AVERROR(EINVAL);
199 goto error;
200 }
201 }
202 avr->out_fifo = av_audio_fifo_alloc(avr->out_sample_fmt, avr->out_channels,
203 1024);
204 if (!avr->out_fifo) {
205 ret = AVERROR(ENOMEM);
206 goto error;
207 }
208
209 /* setup contexts */
210 if (avr->in_convert_needed) {
211 avr->ac_in = ff_audio_convert_alloc(avr, avr->internal_sample_fmt,
212 avr->in_sample_fmt, avr->in_channels,
213 avr->in_sample_rate,
214 avr->remap_point == REMAP_IN_CONVERT);
215 if (!avr->ac_in) {
216 ret = AVERROR(ENOMEM);
217 goto error;
218 }
219 }
220 if (avr->out_convert_needed) {
221 enum AVSampleFormat src_fmt;
222 if (avr->in_convert_needed)
223 src_fmt = avr->internal_sample_fmt;
224 else
225 src_fmt = avr->in_sample_fmt;
226 avr->ac_out = ff_audio_convert_alloc(avr, avr->out_sample_fmt, src_fmt,
227 avr->out_channels,
228 avr->out_sample_rate,
229 avr->remap_point == REMAP_OUT_CONVERT);
230 if (!avr->ac_out) {
231 ret = AVERROR(ENOMEM);
232 goto error;
233 }
234 }
235 if (avr->resample_needed) {
236 avr->resample = ff_audio_resample_init(avr);
237 if (!avr->resample) {
238 ret = AVERROR(ENOMEM);
239 goto error;
240 }
241 }
242 if (avr->mixing_needed) {
243 avr->am = ff_audio_mix_alloc(avr);
244 if (!avr->am) {
245 ret = AVERROR(ENOMEM);
246 goto error;
247 }
248 }
249
250 return 0;
251
252error:
253 avresample_close(avr);
254 return ret;
255}
256
257int avresample_is_open(AVAudioResampleContext *avr)
258{
259 return !!avr->out_fifo;
260}
261
262void avresample_close(AVAudioResampleContext *avr)
263{
264 ff_audio_data_free(&avr->in_buffer);
265 ff_audio_data_free(&avr->resample_out_buffer);
266 ff_audio_data_free(&avr->out_buffer);
267 av_audio_fifo_free(avr->out_fifo);
268 avr->out_fifo = NULL;
269 ff_audio_convert_free(&avr->ac_in);
270 ff_audio_convert_free(&avr->ac_out);
271 ff_audio_resample_free(&avr->resample);
272 ff_audio_mix_free(&avr->am);
273 av_freep(&avr->mix_matrix);
274
275 avr->use_channel_map = 0;
276}
277
278void avresample_free(AVAudioResampleContext **avr)
279{
280 if (!*avr)
281 return;
282 avresample_close(*avr);
283 av_opt_free(*avr);
284 av_freep(avr);
285}
286
287static int handle_buffered_output(AVAudioResampleContext *avr,
288 AudioData *output, AudioData *converted)
289{
290 int ret;
291
292 if (!output || av_audio_fifo_size(avr->out_fifo) > 0 ||
293 (converted && output->allocated_samples < converted->nb_samples)) {
294 if (converted) {
295 /* if there are any samples in the output FIFO or if the
296 user-supplied output buffer is not large enough for all samples,
297 we add to the output FIFO */
298 av_dlog(avr, "[FIFO] add %s to out_fifo\n", converted->name);
299 ret = ff_audio_data_add_to_fifo(avr->out_fifo, converted, 0,
300 converted->nb_samples);
301 if (ret < 0)
302 return ret;
303 }
304
305 /* if the user specified an output buffer, read samples from the output
306 FIFO to the user output */
307 if (output && output->allocated_samples > 0) {
308 av_dlog(avr, "[FIFO] read from out_fifo to output\n");
309 av_dlog(avr, "[end conversion]\n");
310 return ff_audio_data_read_from_fifo(avr->out_fifo, output,
311 output->allocated_samples);
312 }
313 } else if (converted) {
314 /* copy directly to output if it is large enough or there is not any
315 data in the output FIFO */
316 av_dlog(avr, "[copy] %s to output\n", converted->name);
317 output->nb_samples = 0;
318 ret = ff_audio_data_copy(output, converted,
319 avr->remap_point == REMAP_OUT_COPY ?
320 &avr->ch_map_info : NULL);
321 if (ret < 0)
322 return ret;
323 av_dlog(avr, "[end conversion]\n");
324 return output->nb_samples;
325 }
326 av_dlog(avr, "[end conversion]\n");
327 return 0;
328}
329
330int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
331 uint8_t **output, int out_plane_size,
332 int out_samples, uint8_t **input,
333 int in_plane_size, int in_samples)
334{
335 AudioData input_buffer;
336 AudioData output_buffer;
337 AudioData *current_buffer;
338 int ret, direct_output;
339
340 /* reset internal buffers */
341 if (avr->in_buffer) {
342 avr->in_buffer->nb_samples = 0;
343 ff_audio_data_set_channels(avr->in_buffer,
344 avr->in_buffer->allocated_channels);
345 }
346 if (avr->resample_out_buffer) {
347 avr->resample_out_buffer->nb_samples = 0;
348 ff_audio_data_set_channels(avr->resample_out_buffer,
349 avr->resample_out_buffer->allocated_channels);
350 }
351 if (avr->out_buffer) {
352 avr->out_buffer->nb_samples = 0;
353 ff_audio_data_set_channels(avr->out_buffer,
354 avr->out_buffer->allocated_channels);
355 }
356
357 av_dlog(avr, "[start conversion]\n");
358
359 /* initialize output_buffer with output data */
360 direct_output = output && av_audio_fifo_size(avr->out_fifo) == 0;
361 if (output) {
362 ret = ff_audio_data_init(&output_buffer, output, out_plane_size,
363 avr->out_channels, out_samples,
364 avr->out_sample_fmt, 0, "output");
365 if (ret < 0)
366 return ret;
367 output_buffer.nb_samples = 0;
368 }
369
370 if (input) {
371 /* initialize input_buffer with input data */
372 ret = ff_audio_data_init(&input_buffer, input, in_plane_size,
373 avr->in_channels, in_samples,
374 avr->in_sample_fmt, 1, "input");
375 if (ret < 0)
376 return ret;
377 current_buffer = &input_buffer;
378
379 if (avr->upmix_needed && !avr->in_convert_needed && !avr->resample_needed &&
380 !avr->out_convert_needed && direct_output && out_samples >= in_samples) {
381 /* in some rare cases we can copy input to output and upmix
382 directly in the output buffer */
383 av_dlog(avr, "[copy] %s to output\n", current_buffer->name);
384 ret = ff_audio_data_copy(&output_buffer, current_buffer,
385 avr->remap_point == REMAP_OUT_COPY ?
386 &avr->ch_map_info : NULL);
387 if (ret < 0)
388 return ret;
389 current_buffer = &output_buffer;
390 } else if (avr->remap_point == REMAP_OUT_COPY &&
391 (!direct_output || out_samples < in_samples)) {
392 /* if remapping channels during output copy, we may need to
393 * use an intermediate buffer in order to remap before adding
394 * samples to the output fifo */
395 av_dlog(avr, "[copy] %s to out_buffer\n", current_buffer->name);
396 ret = ff_audio_data_copy(avr->out_buffer, current_buffer,
397 &avr->ch_map_info);
398 if (ret < 0)
399 return ret;
400 current_buffer = avr->out_buffer;
401 } else if (avr->in_copy_needed || avr->in_convert_needed) {
402 /* if needed, copy or convert input to in_buffer, and downmix if
403 applicable */
404 if (avr->in_convert_needed) {
405 ret = ff_audio_data_realloc(avr->in_buffer,
406 current_buffer->nb_samples);
407 if (ret < 0)
408 return ret;
409 av_dlog(avr, "[convert] %s to in_buffer\n", current_buffer->name);
410 ret = ff_audio_convert(avr->ac_in, avr->in_buffer,
411 current_buffer);
412 if (ret < 0)
413 return ret;
414 } else {
415 av_dlog(avr, "[copy] %s to in_buffer\n", current_buffer->name);
416 ret = ff_audio_data_copy(avr->in_buffer, current_buffer,
417 avr->remap_point == REMAP_IN_COPY ?
418 &avr->ch_map_info : NULL);
419 if (ret < 0)
420 return ret;
421 }
422 ff_audio_data_set_channels(avr->in_buffer, avr->in_channels);
423 if (avr->downmix_needed) {
424 av_dlog(avr, "[downmix] in_buffer\n");
425 ret = ff_audio_mix(avr->am, avr->in_buffer);
426 if (ret < 0)
427 return ret;
428 }
429 current_buffer = avr->in_buffer;
430 }
431 } else {
432 /* flush resampling buffer and/or output FIFO if input is NULL */
433 if (!avr->resample_needed)
434 return handle_buffered_output(avr, output ? &output_buffer : NULL,
435 NULL);
436 current_buffer = NULL;
437 }
438
439 if (avr->resample_needed) {
440 AudioData *resample_out;
441
442 if (!avr->out_convert_needed && direct_output && out_samples > 0)
443 resample_out = &output_buffer;
444 else
445 resample_out = avr->resample_out_buffer;
446 av_dlog(avr, "[resample] %s to %s\n",
447 current_buffer ? current_buffer->name : "null",
448 resample_out->name);
449 ret = ff_audio_resample(avr->resample, resample_out,
450 current_buffer);
451 if (ret < 0)
452 return ret;
453
454 /* if resampling did not produce any samples, just return 0 */
455 if (resample_out->nb_samples == 0) {
456 av_dlog(avr, "[end conversion]\n");
457 return 0;
458 }
459
460 current_buffer = resample_out;
461 }
462
463 if (avr->upmix_needed) {
464 av_dlog(avr, "[upmix] %s\n", current_buffer->name);
465 ret = ff_audio_mix(avr->am, current_buffer);
466 if (ret < 0)
467 return ret;
468 }
469
470 /* if we resampled or upmixed directly to output, return here */
471 if (current_buffer == &output_buffer) {
472 av_dlog(avr, "[end conversion]\n");
473 return current_buffer->nb_samples;
474 }
475
476 if (avr->out_convert_needed) {
477 if (direct_output && out_samples >= current_buffer->nb_samples) {
478 /* convert directly to output */
479 av_dlog(avr, "[convert] %s to output\n", current_buffer->name);
480 ret = ff_audio_convert(avr->ac_out, &output_buffer, current_buffer);
481 if (ret < 0)
482 return ret;
483
484 av_dlog(avr, "[end conversion]\n");
485 return output_buffer.nb_samples;
486 } else {
487 ret = ff_audio_data_realloc(avr->out_buffer,
488 current_buffer->nb_samples);
489 if (ret < 0)
490 return ret;
491 av_dlog(avr, "[convert] %s to out_buffer\n", current_buffer->name);
492 ret = ff_audio_convert(avr->ac_out, avr->out_buffer,
493 current_buffer);
494 if (ret < 0)
495 return ret;
496 current_buffer = avr->out_buffer;
497 }
498 }
499
500 return handle_buffered_output(avr, output ? &output_buffer : NULL,
501 current_buffer);
502}
503
504int avresample_config(AVAudioResampleContext *avr, AVFrame *out, AVFrame *in)
505{
506 if (avresample_is_open(avr)) {
507 avresample_close(avr);
508 }
509
510 if (in) {
511 avr->in_channel_layout = in->channel_layout;
512 avr->in_sample_rate = in->sample_rate;
513 avr->in_sample_fmt = in->format;
514 }
515
516 if (out) {
517 avr->out_channel_layout = out->channel_layout;
518 avr->out_sample_rate = out->sample_rate;
519 avr->out_sample_fmt = out->format;
520 }
521
522 return 0;
523}
524
525static int config_changed(AVAudioResampleContext *avr,
526 AVFrame *out, AVFrame *in)
527{
528 int ret = 0;
529
530 if (in) {
531 if (avr->in_channel_layout != in->channel_layout ||
532 avr->in_sample_rate != in->sample_rate ||
533 avr->in_sample_fmt != in->format) {
534 ret |= AVERROR_INPUT_CHANGED;
535 }
536 }
537
538 if (out) {
539 if (avr->out_channel_layout != out->channel_layout ||
540 avr->out_sample_rate != out->sample_rate ||
541 avr->out_sample_fmt != out->format) {
542 ret |= AVERROR_OUTPUT_CHANGED;
543 }
544 }
545
546 return ret;
547}
548
549static inline int convert_frame(AVAudioResampleContext *avr,
550 AVFrame *out, AVFrame *in)
551{
552 int ret;
553 uint8_t **out_data = NULL, **in_data = NULL;
554 int out_linesize = 0, in_linesize = 0;
555 int out_nb_samples = 0, in_nb_samples = 0;
556
557 if (out) {
558 out_data = out->extended_data;
559 out_linesize = out->linesize[0];
560 out_nb_samples = out->nb_samples;
561 }
562
563 if (in) {
564 in_data = in->extended_data;
565 in_linesize = in->linesize[0];
566 in_nb_samples = in->nb_samples;
567 }
568
569 ret = avresample_convert(avr, out_data, out_linesize,
570 out_nb_samples,
571 in_data, in_linesize,
572 in_nb_samples);
573
574 if (ret < 0) {
575 if (out)
576 out->nb_samples = 0;
577 return ret;
578 }
579
580 if (out)
581 out->nb_samples = ret;
582
583 return 0;
584}
585
586static inline int available_samples(AVFrame *out)
587{
f6fa7814 588 int samples;
2ba45a60 589 int bytes_per_sample = av_get_bytes_per_sample(out->format);
f6fa7814
DM
590 if (!bytes_per_sample)
591 return AVERROR(EINVAL);
2ba45a60 592
f6fa7814 593 samples = out->linesize[0] / bytes_per_sample;
2ba45a60
DM
594 if (av_sample_fmt_is_planar(out->format)) {
595 return samples;
596 } else {
597 int channels = av_get_channel_layout_nb_channels(out->channel_layout);
598 return samples / channels;
599 }
600}
601
602int avresample_convert_frame(AVAudioResampleContext *avr,
603 AVFrame *out, AVFrame *in)
604{
605 int ret, setup = 0;
606
607 if (!avresample_is_open(avr)) {
608 if ((ret = avresample_config(avr, out, in)) < 0)
609 return ret;
610 if ((ret = avresample_open(avr)) < 0)
611 return ret;
612 setup = 1;
613 } else {
614 // return as is or reconfigure for input changes?
615 if ((ret = config_changed(avr, out, in)))
616 return ret;
617 }
618
619 if (out) {
620 if (!out->linesize[0]) {
621 out->nb_samples = avresample_get_out_samples(avr, in->nb_samples);
622 if ((ret = av_frame_get_buffer(out, 0)) < 0) {
623 if (setup)
624 avresample_close(avr);
625 return ret;
626 }
627 } else {
628 if (!out->nb_samples)
629 out->nb_samples = available_samples(out);
630 }
631 }
632
633 return convert_frame(avr, out, in);
634}
635
636int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix,
637 int stride)
638{
639 int in_channels, out_channels, i, o;
640
641 if (avr->am)
642 return ff_audio_mix_get_matrix(avr->am, matrix, stride);
643
644 in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
645 out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
646
647 if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS ||
648 out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) {
649 av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n");
650 return AVERROR(EINVAL);
651 }
652
653 if (!avr->mix_matrix) {
654 av_log(avr, AV_LOG_ERROR, "matrix is not set\n");
655 return AVERROR(EINVAL);
656 }
657
658 for (o = 0; o < out_channels; o++)
659 for (i = 0; i < in_channels; i++)
660 matrix[o * stride + i] = avr->mix_matrix[o * in_channels + i];
661
662 return 0;
663}
664
665int avresample_set_matrix(AVAudioResampleContext *avr, const double *matrix,
666 int stride)
667{
668 int in_channels, out_channels, i, o;
669
670 if (avr->am)
671 return ff_audio_mix_set_matrix(avr->am, matrix, stride);
672
673 in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
674 out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
675
676 if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS ||
677 out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) {
678 av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n");
679 return AVERROR(EINVAL);
680 }
681
682 if (avr->mix_matrix)
683 av_freep(&avr->mix_matrix);
684 avr->mix_matrix = av_malloc(in_channels * out_channels *
685 sizeof(*avr->mix_matrix));
686 if (!avr->mix_matrix)
687 return AVERROR(ENOMEM);
688
689 for (o = 0; o < out_channels; o++)
690 for (i = 0; i < in_channels; i++)
691 avr->mix_matrix[o * in_channels + i] = matrix[o * stride + i];
692
693 return 0;
694}
695
696int avresample_set_channel_mapping(AVAudioResampleContext *avr,
697 const int *channel_map)
698{
699 ChannelMapInfo *info = &avr->ch_map_info;
700 int in_channels, ch, i;
701
702 in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
703 if (in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS) {
704 av_log(avr, AV_LOG_ERROR, "Invalid input channel layout\n");
705 return AVERROR(EINVAL);
706 }
707
708 memset(info, 0, sizeof(*info));
709 memset(info->input_map, -1, sizeof(info->input_map));
710
711 for (ch = 0; ch < in_channels; ch++) {
712 if (channel_map[ch] >= in_channels) {
713 av_log(avr, AV_LOG_ERROR, "Invalid channel map\n");
714 return AVERROR(EINVAL);
715 }
716 if (channel_map[ch] < 0) {
717 info->channel_zero[ch] = 1;
718 info->channel_map[ch] = -1;
719 info->do_zero = 1;
720 } else if (info->input_map[channel_map[ch]] >= 0) {
721 info->channel_copy[ch] = info->input_map[channel_map[ch]];
722 info->channel_map[ch] = -1;
723 info->do_copy = 1;
724 } else {
725 info->channel_map[ch] = channel_map[ch];
726 info->input_map[channel_map[ch]] = ch;
727 info->do_remap = 1;
728 }
729 }
730 /* Fill-in unmapped input channels with unmapped output channels.
731 This is used when remapping during conversion from interleaved to
732 planar format. */
733 for (ch = 0, i = 0; ch < in_channels && i < in_channels; ch++, i++) {
734 while (ch < in_channels && info->input_map[ch] >= 0)
735 ch++;
736 while (i < in_channels && info->channel_map[i] >= 0)
737 i++;
738 if (ch >= in_channels || i >= in_channels)
739 break;
740 info->input_map[ch] = i;
741 }
742
743 avr->use_channel_map = 1;
744 return 0;
745}
746
747int avresample_available(AVAudioResampleContext *avr)
748{
749 return av_audio_fifo_size(avr->out_fifo);
750}
751
752int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples)
753{
754 int64_t samples = avresample_get_delay(avr) + (int64_t)in_nb_samples;
755
756 if (avr->resample_needed) {
757 samples = av_rescale_rnd(samples,
758 avr->out_sample_rate,
759 avr->in_sample_rate,
760 AV_ROUND_UP);
761 }
762
763 samples += avresample_available(avr);
764
765 if (samples > INT_MAX)
766 return AVERROR(EINVAL);
767
768 return samples;
769}
770
771int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples)
772{
773 if (!output)
774 return av_audio_fifo_drain(avr->out_fifo, nb_samples);
775 return av_audio_fifo_read(avr->out_fifo, (void**)output, nb_samples);
776}
777
778unsigned avresample_version(void)
779{
780 return LIBAVRESAMPLE_VERSION_INT;
781}
782
783const char *avresample_license(void)
784{
785#define LICENSE_PREFIX "libavresample license: "
786 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
787}
788
789const char *avresample_configuration(void)
790{
791 return FFMPEG_CONFIGURATION;
792}