46f339fafde7b7d37a6fe46771b1d7a5023692f6
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of Libav.
7 *
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * utils.
26 */
27
28 #include "config.h"
29 #include "libavutil/attributes.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/crc.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
40 #include "libavutil/dict.h"
41 #include "avcodec.h"
42 #include "dsputil.h"
43 #include "libavutil/opt.h"
44 #include "thread.h"
45 #include "internal.h"
46 #include "bytestream.h"
47 #include "version.h"
48 #include <stdlib.h>
49 #include <stdarg.h>
50 #include <limits.h>
51 #include <float.h>
52
53 static int volatile entangled_thread_counter = 0;
54 static int (*lockmgr_cb)(void **mutex, enum AVLockOp op);
55 static void *codec_mutex;
56 static void *avformat_mutex;
57
58 #if FF_API_FAST_MALLOC && CONFIG_SHARED && HAVE_SYMVER
59 FF_SYMVER(void*, av_fast_realloc, (void *ptr, unsigned int *size, size_t min_size), "LIBAVCODEC_55")
60 {
61 return av_fast_realloc(ptr, size, min_size);
62 }
63
64 FF_SYMVER(void, av_fast_malloc, (void *ptr, unsigned int *size, size_t min_size), "LIBAVCODEC_55")
65 {
66 av_fast_malloc(ptr, size, min_size);
67 }
68 #endif
69
70 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
71 {
72 void **p = ptr;
73 if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
74 av_freep(p);
75 *size = 0;
76 return;
77 }
78 av_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
79 if (*size)
80 memset((uint8_t *)*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
81 }
82
83 /* encoder management */
84 static AVCodec *first_avcodec = NULL;
85
86 AVCodec *av_codec_next(const AVCodec *c)
87 {
88 if (c)
89 return c->next;
90 else
91 return first_avcodec;
92 }
93
94 static av_cold void avcodec_init(void)
95 {
96 static int initialized = 0;
97
98 if (initialized != 0)
99 return;
100 initialized = 1;
101
102 if (CONFIG_DSPUTIL)
103 ff_dsputil_static_init();
104 }
105
106 int av_codec_is_encoder(const AVCodec *codec)
107 {
108 return codec && (codec->encode_sub || codec->encode2);
109 }
110
111 int av_codec_is_decoder(const AVCodec *codec)
112 {
113 return codec && codec->decode;
114 }
115
116 av_cold void avcodec_register(AVCodec *codec)
117 {
118 AVCodec **p;
119 avcodec_init();
120 p = &first_avcodec;
121 while (*p != NULL)
122 p = &(*p)->next;
123 *p = codec;
124 codec->next = NULL;
125
126 if (codec->init_static_data)
127 codec->init_static_data(codec);
128 }
129
130 #if FF_API_EMU_EDGE
131 unsigned avcodec_get_edge_width(void)
132 {
133 return EDGE_WIDTH;
134 }
135 #endif
136
137 #if FF_API_SET_DIMENSIONS
138 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
139 {
140 ff_set_dimensions(s, width, height);
141 }
142 #endif
143
144 int ff_set_dimensions(AVCodecContext *s, int width, int height)
145 {
146 int ret = av_image_check_size(width, height, 0, s);
147
148 if (ret < 0)
149 width = height = 0;
150 s->width = s->coded_width = width;
151 s->height = s->coded_height = height;
152
153 return ret;
154 }
155
156 int ff_side_data_update_matrix_encoding(AVFrame *frame,
157 enum AVMatrixEncoding matrix_encoding)
158 {
159 AVFrameSideData *side_data;
160 enum AVMatrixEncoding *data;
161
162 side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);
163 if (!side_data)
164 side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,
165 sizeof(enum AVMatrixEncoding));
166
167 if (!side_data)
168 return AVERROR(ENOMEM);
169
170 data = (enum AVMatrixEncoding*)side_data->data;
171 *data = matrix_encoding;
172
173 return 0;
174 }
175
176 #if HAVE_NEON || ARCH_PPC || HAVE_MMX
177 # define STRIDE_ALIGN 16
178 #else
179 # define STRIDE_ALIGN 8
180 #endif
181
182 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
183 int linesize_align[AV_NUM_DATA_POINTERS])
184 {
185 int i;
186 int w_align = 1;
187 int h_align = 1;
188
189 switch (s->pix_fmt) {
190 case AV_PIX_FMT_YUV420P:
191 case AV_PIX_FMT_YUYV422:
192 case AV_PIX_FMT_UYVY422:
193 case AV_PIX_FMT_YUV422P:
194 case AV_PIX_FMT_YUV440P:
195 case AV_PIX_FMT_YUV444P:
196 case AV_PIX_FMT_GBRP:
197 case AV_PIX_FMT_GRAY8:
198 case AV_PIX_FMT_GRAY16BE:
199 case AV_PIX_FMT_GRAY16LE:
200 case AV_PIX_FMT_YUVJ420P:
201 case AV_PIX_FMT_YUVJ422P:
202 case AV_PIX_FMT_YUVJ440P:
203 case AV_PIX_FMT_YUVJ444P:
204 case AV_PIX_FMT_YUVA420P:
205 case AV_PIX_FMT_YUVA422P:
206 case AV_PIX_FMT_YUVA444P:
207 case AV_PIX_FMT_YUV420P9LE:
208 case AV_PIX_FMT_YUV420P9BE:
209 case AV_PIX_FMT_YUV420P10LE:
210 case AV_PIX_FMT_YUV420P10BE:
211 case AV_PIX_FMT_YUV422P9LE:
212 case AV_PIX_FMT_YUV422P9BE:
213 case AV_PIX_FMT_YUV422P10LE:
214 case AV_PIX_FMT_YUV422P10BE:
215 case AV_PIX_FMT_YUVA422P10LE:
216 case AV_PIX_FMT_YUVA422P10BE:
217 case AV_PIX_FMT_YUV444P9LE:
218 case AV_PIX_FMT_YUV444P9BE:
219 case AV_PIX_FMT_YUV444P10LE:
220 case AV_PIX_FMT_YUV444P10BE:
221 case AV_PIX_FMT_YUVA444P10LE:
222 case AV_PIX_FMT_YUVA444P10BE:
223 case AV_PIX_FMT_GBRP9LE:
224 case AV_PIX_FMT_GBRP9BE:
225 case AV_PIX_FMT_GBRP10LE:
226 case AV_PIX_FMT_GBRP10BE:
227 w_align = 16; //FIXME assume 16 pixel per macroblock
228 h_align = 16 * 2; // interlaced needs 2 macroblocks height
229 break;
230 case AV_PIX_FMT_YUV411P:
231 case AV_PIX_FMT_UYYVYY411:
232 w_align = 32;
233 h_align = 8;
234 break;
235 case AV_PIX_FMT_YUV410P:
236 if (s->codec_id == AV_CODEC_ID_SVQ1) {
237 w_align = 64;
238 h_align = 64;
239 }
240 case AV_PIX_FMT_RGB555:
241 if (s->codec_id == AV_CODEC_ID_RPZA) {
242 w_align = 4;
243 h_align = 4;
244 }
245 case AV_PIX_FMT_PAL8:
246 case AV_PIX_FMT_BGR8:
247 case AV_PIX_FMT_RGB8:
248 if (s->codec_id == AV_CODEC_ID_SMC) {
249 w_align = 4;
250 h_align = 4;
251 }
252 break;
253 case AV_PIX_FMT_BGR24:
254 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
255 (s->codec_id == AV_CODEC_ID_ZLIB)) {
256 w_align = 4;
257 h_align = 4;
258 }
259 break;
260 default:
261 w_align = 1;
262 h_align = 1;
263 break;
264 }
265
266 *width = FFALIGN(*width, w_align);
267 *height = FFALIGN(*height, h_align);
268 if (s->codec_id == AV_CODEC_ID_H264)
269 // some of the optimized chroma MC reads one line too much
270 *height += 2;
271
272 for (i = 0; i < 4; i++)
273 linesize_align[i] = STRIDE_ALIGN;
274 }
275
276 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
277 {
278 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
279 int chroma_shift = desc->log2_chroma_w;
280 int linesize_align[AV_NUM_DATA_POINTERS];
281 int align;
282
283 avcodec_align_dimensions2(s, width, height, linesize_align);
284 align = FFMAX(linesize_align[0], linesize_align[3]);
285 linesize_align[1] <<= chroma_shift;
286 linesize_align[2] <<= chroma_shift;
287 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
288 *width = FFALIGN(*width, align);
289 }
290
291 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
292 enum AVSampleFormat sample_fmt, const uint8_t *buf,
293 int buf_size, int align)
294 {
295 int ch, planar, needed_size, ret = 0;
296
297 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
298 frame->nb_samples, sample_fmt,
299 align);
300 if (buf_size < needed_size)
301 return AVERROR(EINVAL);
302
303 planar = av_sample_fmt_is_planar(sample_fmt);
304 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
305 if (!(frame->extended_data = av_mallocz(nb_channels *
306 sizeof(*frame->extended_data))))
307 return AVERROR(ENOMEM);
308 } else {
309 frame->extended_data = frame->data;
310 }
311
312 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
313 buf, nb_channels, frame->nb_samples,
314 sample_fmt, align)) < 0) {
315 if (frame->extended_data != frame->data)
316 av_free(frame->extended_data);
317 return ret;
318 }
319 if (frame->extended_data != frame->data) {
320 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
321 frame->data[ch] = frame->extended_data[ch];
322 }
323
324 return ret;
325 }
326
327 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
328 {
329 FramePool *pool = avctx->internal->pool;
330 int i, ret;
331
332 switch (avctx->codec_type) {
333 case AVMEDIA_TYPE_VIDEO: {
334 AVPicture picture;
335 int size[4] = { 0 };
336 int w = frame->width;
337 int h = frame->height;
338 int tmpsize, unaligned;
339
340 if (pool->format == frame->format &&
341 pool->width == frame->width && pool->height == frame->height)
342 return 0;
343
344 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
345
346 if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
347 w += EDGE_WIDTH * 2;
348 h += EDGE_WIDTH * 2;
349 }
350
351 do {
352 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
353 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
354 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
355 // increase alignment of w for next try (rhs gives the lowest bit set in w)
356 w += w & ~(w - 1);
357
358 unaligned = 0;
359 for (i = 0; i < 4; i++)
360 unaligned |= picture.linesize[i] % pool->stride_align[i];
361 } while (unaligned);
362
363 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
364 NULL, picture.linesize);
365 if (tmpsize < 0)
366 return -1;
367
368 for (i = 0; i < 3 && picture.data[i + 1]; i++)
369 size[i] = picture.data[i + 1] - picture.data[i];
370 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
371
372 for (i = 0; i < 4; i++) {
373 av_buffer_pool_uninit(&pool->pools[i]);
374 pool->linesize[i] = picture.linesize[i];
375 if (size[i]) {
376 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
377 if (!pool->pools[i]) {
378 ret = AVERROR(ENOMEM);
379 goto fail;
380 }
381 }
382 }
383 pool->format = frame->format;
384 pool->width = frame->width;
385 pool->height = frame->height;
386
387 break;
388 }
389 case AVMEDIA_TYPE_AUDIO: {
390 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
391 int planar = av_sample_fmt_is_planar(frame->format);
392 int planes = planar ? ch : 1;
393
394 if (pool->format == frame->format && pool->planes == planes &&
395 pool->channels == ch && frame->nb_samples == pool->samples)
396 return 0;
397
398 av_buffer_pool_uninit(&pool->pools[0]);
399 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
400 frame->nb_samples, frame->format, 0);
401 if (ret < 0)
402 goto fail;
403
404 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
405 if (!pool->pools[0]) {
406 ret = AVERROR(ENOMEM);
407 goto fail;
408 }
409
410 pool->format = frame->format;
411 pool->planes = planes;
412 pool->channels = ch;
413 pool->samples = frame->nb_samples;
414 break;
415 }
416 default: av_assert0(0);
417 }
418 return 0;
419 fail:
420 for (i = 0; i < 4; i++)
421 av_buffer_pool_uninit(&pool->pools[i]);
422 pool->format = -1;
423 pool->planes = pool->channels = pool->samples = 0;
424 pool->width = pool->height = 0;
425 return ret;
426 }
427
428 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
429 {
430 FramePool *pool = avctx->internal->pool;
431 int planes = pool->planes;
432 int i;
433
434 frame->linesize[0] = pool->linesize[0];
435
436 if (planes > AV_NUM_DATA_POINTERS) {
437 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
438 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
439 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
440 sizeof(*frame->extended_buf));
441 if (!frame->extended_data || !frame->extended_buf) {
442 av_freep(&frame->extended_data);
443 av_freep(&frame->extended_buf);
444 return AVERROR(ENOMEM);
445 }
446 } else
447 frame->extended_data = frame->data;
448
449 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
450 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
451 if (!frame->buf[i])
452 goto fail;
453 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
454 }
455 for (i = 0; i < frame->nb_extended_buf; i++) {
456 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
457 if (!frame->extended_buf[i])
458 goto fail;
459 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
460 }
461
462 if (avctx->debug & FF_DEBUG_BUFFERS)
463 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
464
465 return 0;
466 fail:
467 av_frame_unref(frame);
468 return AVERROR(ENOMEM);
469 }
470
471 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
472 {
473 FramePool *pool = s->internal->pool;
474 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
475 int pixel_size = desc->comp[0].step_minus1 + 1;
476 int h_chroma_shift, v_chroma_shift;
477 int i;
478
479 if (pic->data[0] != NULL) {
480 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
481 return -1;
482 }
483
484 memset(pic->data, 0, sizeof(pic->data));
485 pic->extended_data = pic->data;
486
487 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
488
489 for (i = 0; i < 4 && pool->pools[i]; i++) {
490 const int h_shift = i == 0 ? 0 : h_chroma_shift;
491 const int v_shift = i == 0 ? 0 : v_chroma_shift;
492
493 pic->linesize[i] = pool->linesize[i];
494
495 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
496 if (!pic->buf[i])
497 goto fail;
498
499 // no edge if EDGE EMU or not planar YUV
500 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
501 pic->data[i] = pic->buf[i]->data;
502 else {
503 pic->data[i] = pic->buf[i]->data +
504 FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
505 (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
506 }
507 }
508 for (; i < AV_NUM_DATA_POINTERS; i++) {
509 pic->data[i] = NULL;
510 pic->linesize[i] = 0;
511 }
512 if (pic->data[1] && !pic->data[2])
513 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
514
515 if (s->debug & FF_DEBUG_BUFFERS)
516 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
517
518 return 0;
519 fail:
520 av_frame_unref(pic);
521 return AVERROR(ENOMEM);
522 }
523
524 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
525 {
526 int ret;
527
528 if ((ret = update_frame_pool(avctx, frame)) < 0)
529 return ret;
530
531 #if FF_API_GET_BUFFER
532 FF_DISABLE_DEPRECATION_WARNINGS
533 frame->type = FF_BUFFER_TYPE_INTERNAL;
534 FF_ENABLE_DEPRECATION_WARNINGS
535 #endif
536
537 switch (avctx->codec_type) {
538 case AVMEDIA_TYPE_VIDEO:
539 return video_get_buffer(avctx, frame);
540 case AVMEDIA_TYPE_AUDIO:
541 return audio_get_buffer(avctx, frame);
542 default:
543 return -1;
544 }
545 }
546
547 #if FF_API_GET_BUFFER
548 FF_DISABLE_DEPRECATION_WARNINGS
549 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
550 {
551 return avcodec_default_get_buffer2(avctx, frame, 0);
552 }
553
554 typedef struct CompatReleaseBufPriv {
555 AVCodecContext avctx;
556 AVFrame frame;
557 } CompatReleaseBufPriv;
558
559 static void compat_free_buffer(void *opaque, uint8_t *data)
560 {
561 CompatReleaseBufPriv *priv = opaque;
562 if (priv->avctx.release_buffer)
563 priv->avctx.release_buffer(&priv->avctx, &priv->frame);
564 av_freep(&priv);
565 }
566
567 static void compat_release_buffer(void *opaque, uint8_t *data)
568 {
569 AVBufferRef *buf = opaque;
570 av_buffer_unref(&buf);
571 }
572 FF_ENABLE_DEPRECATION_WARNINGS
573 #endif
574
575 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
576 {
577 int override_dimensions = 1;
578 int ret;
579
580 switch (avctx->codec_type) {
581 case AVMEDIA_TYPE_VIDEO:
582 if (frame->width <= 0 || frame->height <= 0) {
583 frame->width = FFMAX(avctx->width, avctx->coded_width);
584 frame->height = FFMAX(avctx->height, avctx->coded_height);
585 override_dimensions = 0;
586 }
587 if (frame->format < 0)
588 frame->format = avctx->pix_fmt;
589 if (!frame->sample_aspect_ratio.num)
590 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
591
592 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
593 return ret;
594 break;
595 case AVMEDIA_TYPE_AUDIO:
596 if (!frame->sample_rate)
597 frame->sample_rate = avctx->sample_rate;
598 if (frame->format < 0)
599 frame->format = avctx->sample_fmt;
600 if (!frame->channel_layout) {
601 if (avctx->channel_layout) {
602 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
603 avctx->channels) {
604 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
605 "configuration.\n");
606 return AVERROR(EINVAL);
607 }
608
609 frame->channel_layout = avctx->channel_layout;
610 } else {
611 if (avctx->channels > FF_SANE_NB_CHANNELS) {
612 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
613 avctx->channels);
614 return AVERROR(ENOSYS);
615 }
616
617 frame->channel_layout = av_get_default_channel_layout(avctx->channels);
618 if (!frame->channel_layout)
619 frame->channel_layout = (1ULL << avctx->channels) - 1;
620 }
621 }
622 break;
623 default: return AVERROR(EINVAL);
624 }
625
626 frame->pkt_pts = avctx->internal->pkt ? avctx->internal->pkt->pts : AV_NOPTS_VALUE;
627 frame->reordered_opaque = avctx->reordered_opaque;
628
629 #if FF_API_GET_BUFFER
630 FF_DISABLE_DEPRECATION_WARNINGS
631 /*
632 * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
633 * We wrap each plane in its own AVBuffer. Each of those has a reference to
634 * a dummy AVBuffer as its private data, unreffing it on free.
635 * When all the planes are freed, the dummy buffer's free callback calls
636 * release_buffer().
637 */
638 if (avctx->get_buffer) {
639 CompatReleaseBufPriv *priv = NULL;
640 AVBufferRef *dummy_buf = NULL;
641 int planes, i, ret;
642
643 if (flags & AV_GET_BUFFER_FLAG_REF)
644 frame->reference = 1;
645
646 ret = avctx->get_buffer(avctx, frame);
647 if (ret < 0)
648 return ret;
649
650 /* return if the buffers are already set up
651 * this would happen e.g. when a custom get_buffer() calls
652 * avcodec_default_get_buffer
653 */
654 if (frame->buf[0])
655 return 0;
656
657 priv = av_mallocz(sizeof(*priv));
658 if (!priv) {
659 ret = AVERROR(ENOMEM);
660 goto fail;
661 }
662 priv->avctx = *avctx;
663 priv->frame = *frame;
664
665 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
666 if (!dummy_buf) {
667 ret = AVERROR(ENOMEM);
668 goto fail;
669 }
670
671 #define WRAP_PLANE(ref_out, data, data_size) \
672 do { \
673 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
674 if (!dummy_ref) { \
675 ret = AVERROR(ENOMEM); \
676 goto fail; \
677 } \
678 ref_out = av_buffer_create(data, data_size, compat_release_buffer, \
679 dummy_ref, 0); \
680 if (!ref_out) { \
681 av_frame_unref(frame); \
682 ret = AVERROR(ENOMEM); \
683 goto fail; \
684 } \
685 } while (0)
686
687 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
688 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
689
690 planes = av_pix_fmt_count_planes(frame->format);
691 /* workaround for AVHWAccel plane count of 0, buf[0] is used as
692 check for allocated buffers: make libavcodec happy */
693 if (desc && desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
694 planes = 1;
695 if (!desc || planes <= 0) {
696 ret = AVERROR(EINVAL);
697 goto fail;
698 }
699
700 for (i = 0; i < planes; i++) {
701 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
702 int plane_size = (frame->height >> v_shift) * frame->linesize[i];
703
704 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
705 }
706 } else {
707 int planar = av_sample_fmt_is_planar(frame->format);
708 planes = planar ? avctx->channels : 1;
709
710 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
711 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
712 frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
713 frame->nb_extended_buf);
714 if (!frame->extended_buf) {
715 ret = AVERROR(ENOMEM);
716 goto fail;
717 }
718 }
719
720 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
721 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
722
723 for (i = 0; i < frame->nb_extended_buf; i++)
724 WRAP_PLANE(frame->extended_buf[i],
725 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
726 frame->linesize[0]);
727 }
728
729 av_buffer_unref(&dummy_buf);
730
731 frame->width = avctx->width;
732 frame->height = avctx->height;
733
734 return 0;
735
736 fail:
737 avctx->release_buffer(avctx, frame);
738 av_freep(&priv);
739 av_buffer_unref(&dummy_buf);
740 return ret;
741 }
742 FF_ENABLE_DEPRECATION_WARNINGS
743 #endif
744
745 ret = avctx->get_buffer2(avctx, frame, flags);
746
747 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions) {
748 frame->width = avctx->width;
749 frame->height = avctx->height;
750 }
751
752 return ret;
753 }
754
755 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
756 {
757 AVFrame tmp;
758 int ret;
759
760 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
761
762 if (!frame->data[0])
763 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
764
765 if (av_frame_is_writable(frame))
766 return 0;
767
768 av_frame_move_ref(&tmp, frame);
769
770 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
771 if (ret < 0) {
772 av_frame_unref(&tmp);
773 return ret;
774 }
775
776 av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
777 frame->format, frame->width, frame->height);
778
779 av_frame_unref(&tmp);
780
781 return 0;
782 }
783
784 #if FF_API_GET_BUFFER
785 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
786 {
787 av_frame_unref(pic);
788 }
789
790 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
791 {
792 av_assert0(0);
793 return AVERROR_BUG;
794 }
795 #endif
796
797 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
798 {
799 int i;
800
801 for (i = 0; i < count; i++) {
802 int r = func(c, (char *)arg + i * size);
803 if (ret)
804 ret[i] = r;
805 }
806 return 0;
807 }
808
809 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
810 {
811 int i;
812
813 for (i = 0; i < count; i++) {
814 int r = func(c, arg, i, 0);
815 if (ret)
816 ret[i] = r;
817 }
818 return 0;
819 }
820
821 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
822 {
823 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
824 return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
825 }
826
827 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
828 {
829 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
830 ++fmt;
831 return fmt[0];
832 }
833
834 #if FF_API_AVFRAME_LAVC
835 void avcodec_get_frame_defaults(AVFrame *frame)
836 {
837 if (frame->extended_data != frame->data)
838 av_freep(&frame->extended_data);
839
840 memset(frame, 0, sizeof(AVFrame));
841
842 frame->pts = AV_NOPTS_VALUE;
843 frame->key_frame = 1;
844 frame->sample_aspect_ratio = (AVRational) {0, 1 };
845 frame->format = -1; /* unknown */
846 frame->extended_data = frame->data;
847 }
848
849 AVFrame *avcodec_alloc_frame(void)
850 {
851 AVFrame *frame = av_mallocz(sizeof(AVFrame));
852
853 if (frame == NULL)
854 return NULL;
855
856 FF_DISABLE_DEPRECATION_WARNINGS
857 avcodec_get_frame_defaults(frame);
858 FF_ENABLE_DEPRECATION_WARNINGS
859
860 return frame;
861 }
862
863 void avcodec_free_frame(AVFrame **frame)
864 {
865 av_frame_free(frame);
866 }
867 #endif
868
869 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
870 {
871 int ret = 0;
872 AVDictionary *tmp = NULL;
873
874 if (avcodec_is_open(avctx))
875 return 0;
876
877 if ((!codec && !avctx->codec)) {
878 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
879 return AVERROR(EINVAL);
880 }
881 if ((codec && avctx->codec && codec != avctx->codec)) {
882 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
883 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
884 return AVERROR(EINVAL);
885 }
886 if (!codec)
887 codec = avctx->codec;
888
889 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
890 return AVERROR(EINVAL);
891
892 if (options)
893 av_dict_copy(&tmp, *options, 0);
894
895 /* If there is a user-supplied mutex locking routine, call it. */
896 if (lockmgr_cb) {
897 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
898 return -1;
899 }
900
901 entangled_thread_counter++;
902 if (entangled_thread_counter != 1) {
903 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
904 ret = -1;
905 goto end;
906 }
907
908 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
909 if (!avctx->internal) {
910 ret = AVERROR(ENOMEM);
911 goto end;
912 }
913
914 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
915 if (!avctx->internal->pool) {
916 ret = AVERROR(ENOMEM);
917 goto free_and_end;
918 }
919
920 avctx->internal->to_free = av_frame_alloc();
921 if (!avctx->internal->to_free) {
922 ret = AVERROR(ENOMEM);
923 goto free_and_end;
924 }
925
926 if (codec->priv_data_size > 0) {
927 if (!avctx->priv_data) {
928 avctx->priv_data = av_mallocz(codec->priv_data_size);
929 if (!avctx->priv_data) {
930 ret = AVERROR(ENOMEM);
931 goto end;
932 }
933 if (codec->priv_class) {
934 *(const AVClass **)avctx->priv_data = codec->priv_class;
935 av_opt_set_defaults(avctx->priv_data);
936 }
937 }
938 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
939 goto free_and_end;
940 } else {
941 avctx->priv_data = NULL;
942 }
943 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
944 goto free_and_end;
945
946 if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)
947 ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
948 else if (avctx->width && avctx->height)
949 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
950 if (ret < 0)
951 goto free_and_end;
952
953 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
954 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
955 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
956 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
957 ff_set_dimensions(avctx, 0, 0);
958 }
959
960 /* if the decoder init function was already called previously,
961 * free the already allocated subtitle_header before overwriting it */
962 if (av_codec_is_decoder(codec))
963 av_freep(&avctx->subtitle_header);
964
965 if (avctx->channels > FF_SANE_NB_CHANNELS) {
966 ret = AVERROR(EINVAL);
967 goto free_and_end;
968 }
969
970 avctx->codec = codec;
971 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
972 avctx->codec_id == AV_CODEC_ID_NONE) {
973 avctx->codec_type = codec->type;
974 avctx->codec_id = codec->id;
975 }
976 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
977 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
978 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
979 ret = AVERROR(EINVAL);
980 goto free_and_end;
981 }
982 avctx->frame_number = 0;
983
984 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
985 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
986 ret = AVERROR_EXPERIMENTAL;
987 goto free_and_end;
988 }
989
990 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
991 (!avctx->time_base.num || !avctx->time_base.den)) {
992 avctx->time_base.num = 1;
993 avctx->time_base.den = avctx->sample_rate;
994 }
995
996 if (HAVE_THREADS) {
997 ret = ff_thread_init(avctx);
998 if (ret < 0) {
999 goto free_and_end;
1000 }
1001 }
1002 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
1003 avctx->thread_count = 1;
1004
1005 if (av_codec_is_encoder(avctx->codec)) {
1006 int i;
1007 if (avctx->codec->sample_fmts) {
1008 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
1009 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
1010 break;
1011 if (avctx->channels == 1 &&
1012 av_get_planar_sample_fmt(avctx->sample_fmt) ==
1013 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
1014 avctx->sample_fmt = avctx->codec->sample_fmts[i];
1015 break;
1016 }
1017 }
1018 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
1019 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
1020 ret = AVERROR(EINVAL);
1021 goto free_and_end;
1022 }
1023 }
1024 if (avctx->codec->pix_fmts) {
1025 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
1026 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
1027 break;
1028 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
1029 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
1030 ret = AVERROR(EINVAL);
1031 goto free_and_end;
1032 }
1033 }
1034 if (avctx->codec->supported_samplerates) {
1035 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1036 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1037 break;
1038 if (avctx->codec->supported_samplerates[i] == 0) {
1039 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
1040 ret = AVERROR(EINVAL);
1041 goto free_and_end;
1042 }
1043 }
1044 if (avctx->codec->channel_layouts) {
1045 if (!avctx->channel_layout) {
1046 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
1047 } else {
1048 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1049 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1050 break;
1051 if (avctx->codec->channel_layouts[i] == 0) {
1052 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
1053 ret = AVERROR(EINVAL);
1054 goto free_and_end;
1055 }
1056 }
1057 }
1058 if (avctx->channel_layout && avctx->channels) {
1059 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
1060 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
1061 ret = AVERROR(EINVAL);
1062 goto free_and_end;
1063 }
1064 } else if (avctx->channel_layout) {
1065 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1066 }
1067
1068 if (!avctx->rc_initial_buffer_occupancy)
1069 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1070 }
1071
1072 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
1073 ret = avctx->codec->init(avctx);
1074 if (ret < 0) {
1075 goto free_and_end;
1076 }
1077 }
1078
1079 if (av_codec_is_decoder(avctx->codec)) {
1080 /* validate channel layout from the decoder */
1081 if (avctx->channel_layout) {
1082 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1083 if (!avctx->channels)
1084 avctx->channels = channels;
1085 else if (channels != avctx->channels) {
1086 av_log(avctx, AV_LOG_WARNING,
1087 "channel layout does not match number of channels\n");
1088 avctx->channel_layout = 0;
1089 }
1090 }
1091 if (avctx->channels && avctx->channels < 0 ||
1092 avctx->channels > FF_SANE_NB_CHANNELS) {
1093 ret = AVERROR(EINVAL);
1094 goto free_and_end;
1095 }
1096 }
1097 end:
1098 entangled_thread_counter--;
1099
1100 /* Release any user-supplied mutex. */
1101 if (lockmgr_cb) {
1102 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1103 }
1104 if (options) {
1105 av_dict_free(options);
1106 *options = tmp;
1107 }
1108
1109 return ret;
1110 free_and_end:
1111 av_dict_free(&tmp);
1112 av_freep(&avctx->priv_data);
1113 if (avctx->internal) {
1114 av_frame_free(&avctx->internal->to_free);
1115 av_freep(&avctx->internal->pool);
1116 }
1117 av_freep(&avctx->internal);
1118 avctx->codec = NULL;
1119 goto end;
1120 }
1121
1122 int ff_alloc_packet(AVPacket *avpkt, int size)
1123 {
1124 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
1125 return AVERROR(EINVAL);
1126
1127 if (avpkt->data) {
1128 AVBufferRef *buf = avpkt->buf;
1129 #if FF_API_DESTRUCT_PACKET
1130 FF_DISABLE_DEPRECATION_WARNINGS
1131 void *destruct = avpkt->destruct;
1132 FF_ENABLE_DEPRECATION_WARNINGS
1133 #endif
1134
1135 if (avpkt->size < size)
1136 return AVERROR(EINVAL);
1137
1138 av_init_packet(avpkt);
1139 #if FF_API_DESTRUCT_PACKET
1140 FF_DISABLE_DEPRECATION_WARNINGS
1141 avpkt->destruct = destruct;
1142 FF_ENABLE_DEPRECATION_WARNINGS
1143 #endif
1144 avpkt->buf = buf;
1145 avpkt->size = size;
1146 return 0;
1147 } else {
1148 return av_new_packet(avpkt, size);
1149 }
1150 }
1151
1152 /**
1153 * Pad last frame with silence.
1154 */
1155 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1156 {
1157 AVFrame *frame = NULL;
1158 int ret;
1159
1160 if (!(frame = av_frame_alloc()))
1161 return AVERROR(ENOMEM);
1162
1163 frame->format = src->format;
1164 frame->channel_layout = src->channel_layout;
1165 frame->nb_samples = s->frame_size;
1166 ret = av_frame_get_buffer(frame, 32);
1167 if (ret < 0)
1168 goto fail;
1169
1170 ret = av_frame_copy_props(frame, src);
1171 if (ret < 0)
1172 goto fail;
1173
1174 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1175 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1176 goto fail;
1177 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1178 frame->nb_samples - src->nb_samples,
1179 s->channels, s->sample_fmt)) < 0)
1180 goto fail;
1181
1182 *dst = frame;
1183
1184 return 0;
1185
1186 fail:
1187 av_frame_free(&frame);
1188 return ret;
1189 }
1190
1191 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1192 AVPacket *avpkt,
1193 const AVFrame *frame,
1194 int *got_packet_ptr)
1195 {
1196 AVFrame tmp;
1197 AVFrame *padded_frame = NULL;
1198 int ret;
1199 int user_packet = !!avpkt->data;
1200
1201 *got_packet_ptr = 0;
1202
1203 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1204 av_free_packet(avpkt);
1205 av_init_packet(avpkt);
1206 return 0;
1207 }
1208
1209 /* ensure that extended_data is properly set */
1210 if (frame && !frame->extended_data) {
1211 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1212 avctx->channels > AV_NUM_DATA_POINTERS) {
1213 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1214 "with more than %d channels, but extended_data is not set.\n",
1215 AV_NUM_DATA_POINTERS);
1216 return AVERROR(EINVAL);
1217 }
1218 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1219
1220 tmp = *frame;
1221 tmp.extended_data = tmp.data;
1222 frame = &tmp;
1223 }
1224
1225 /* check for valid frame size */
1226 if (frame) {
1227 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1228 if (frame->nb_samples > avctx->frame_size)
1229 return AVERROR(EINVAL);
1230 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1231 if (frame->nb_samples < avctx->frame_size &&
1232 !avctx->internal->last_audio_frame) {
1233 ret = pad_last_frame(avctx, &padded_frame, frame);
1234 if (ret < 0)
1235 return ret;
1236
1237 frame = padded_frame;
1238 avctx->internal->last_audio_frame = 1;
1239 }
1240
1241 if (frame->nb_samples != avctx->frame_size) {
1242 ret = AVERROR(EINVAL);
1243 goto end;
1244 }
1245 }
1246 }
1247
1248 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1249 if (!ret) {
1250 if (*got_packet_ptr) {
1251 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1252 if (avpkt->pts == AV_NOPTS_VALUE)
1253 avpkt->pts = frame->pts;
1254 if (!avpkt->duration)
1255 avpkt->duration = ff_samples_to_time_base(avctx,
1256 frame->nb_samples);
1257 }
1258 avpkt->dts = avpkt->pts;
1259 } else {
1260 avpkt->size = 0;
1261 }
1262
1263 if (!user_packet && avpkt->size) {
1264 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1265 if (ret >= 0)
1266 avpkt->data = avpkt->buf->data;
1267 }
1268
1269 avctx->frame_number++;
1270 }
1271
1272 if (ret < 0 || !*got_packet_ptr) {
1273 av_free_packet(avpkt);
1274 av_init_packet(avpkt);
1275 goto end;
1276 }
1277
1278 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1279 * this needs to be moved to the encoders, but for now we can do it
1280 * here to simplify things */
1281 avpkt->flags |= AV_PKT_FLAG_KEY;
1282
1283 end:
1284 av_frame_free(&padded_frame);
1285
1286 return ret;
1287 }
1288
1289 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1290 AVPacket *avpkt,
1291 const AVFrame *frame,
1292 int *got_packet_ptr)
1293 {
1294 int ret;
1295 int user_packet = !!avpkt->data;
1296
1297 *got_packet_ptr = 0;
1298
1299 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1300 av_free_packet(avpkt);
1301 av_init_packet(avpkt);
1302 avpkt->size = 0;
1303 return 0;
1304 }
1305
1306 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1307 return AVERROR(EINVAL);
1308
1309 av_assert0(avctx->codec->encode2);
1310
1311 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1312 if (!ret) {
1313 if (!*got_packet_ptr)
1314 avpkt->size = 0;
1315 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1316 avpkt->pts = avpkt->dts = frame->pts;
1317
1318 if (!user_packet && avpkt->size) {
1319 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1320 if (ret >= 0)
1321 avpkt->data = avpkt->buf->data;
1322 }
1323
1324 avctx->frame_number++;
1325 }
1326
1327 if (ret < 0 || !*got_packet_ptr)
1328 av_free_packet(avpkt);
1329
1330 emms_c();
1331 return ret;
1332 }
1333
1334 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1335 const AVSubtitle *sub)
1336 {
1337 int ret;
1338 if (sub->start_display_time) {
1339 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1340 return -1;
1341 }
1342 if (sub->num_rects == 0 || !sub->rects)
1343 return -1;
1344 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1345 avctx->frame_number++;
1346 return ret;
1347 }
1348
1349 static int apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1350 {
1351 int size = 0, ret;
1352 const uint8_t *data;
1353 uint32_t flags;
1354
1355 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1356 if (!data)
1357 return 0;
1358
1359 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE)) {
1360 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
1361 "changes, but PARAM_CHANGE side data was sent to it.\n");
1362 return AVERROR(EINVAL);
1363 }
1364
1365 if (size < 4)
1366 goto fail;
1367
1368 flags = bytestream_get_le32(&data);
1369 size -= 4;
1370
1371 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1372 if (size < 4)
1373 goto fail;
1374 avctx->channels = bytestream_get_le32(&data);
1375 size -= 4;
1376 }
1377 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1378 if (size < 8)
1379 goto fail;
1380 avctx->channel_layout = bytestream_get_le64(&data);
1381 size -= 8;
1382 }
1383 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1384 if (size < 4)
1385 goto fail;
1386 avctx->sample_rate = bytestream_get_le32(&data);
1387 size -= 4;
1388 }
1389 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1390 if (size < 8)
1391 goto fail;
1392 avctx->width = bytestream_get_le32(&data);
1393 avctx->height = bytestream_get_le32(&data);
1394 size -= 8;
1395 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
1396 if (ret < 0)
1397 return ret;
1398 }
1399
1400 return 0;
1401 fail:
1402 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
1403 return AVERROR_INVALIDDATA;
1404 }
1405
1406 static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
1407 {
1408 int ret;
1409
1410 /* move the original frame to our backup */
1411 av_frame_unref(avci->to_free);
1412 av_frame_move_ref(avci->to_free, frame);
1413
1414 /* now copy everything except the AVBufferRefs back
1415 * note that we make a COPY of the side data, so calling av_frame_free() on
1416 * the caller's frame will work properly */
1417 ret = av_frame_copy_props(frame, avci->to_free);
1418 if (ret < 0)
1419 return ret;
1420
1421 memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
1422 memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
1423 if (avci->to_free->extended_data != avci->to_free->data) {
1424 int planes = av_get_channel_layout_nb_channels(avci->to_free->channel_layout);
1425 int size = planes * sizeof(*frame->extended_data);
1426
1427 if (!size) {
1428 av_frame_unref(frame);
1429 return AVERROR_BUG;
1430 }
1431
1432 frame->extended_data = av_malloc(size);
1433 if (!frame->extended_data) {
1434 av_frame_unref(frame);
1435 return AVERROR(ENOMEM);
1436 }
1437 memcpy(frame->extended_data, avci->to_free->extended_data,
1438 size);
1439 } else
1440 frame->extended_data = frame->data;
1441
1442 frame->format = avci->to_free->format;
1443 frame->width = avci->to_free->width;
1444 frame->height = avci->to_free->height;
1445 frame->channel_layout = avci->to_free->channel_layout;
1446 frame->nb_samples = avci->to_free->nb_samples;
1447
1448 return 0;
1449 }
1450
1451 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1452 int *got_picture_ptr,
1453 AVPacket *avpkt)
1454 {
1455 AVCodecInternal *avci = avctx->internal;
1456 int ret;
1457
1458 *got_picture_ptr = 0;
1459 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1460 return -1;
1461
1462 avctx->internal->pkt = avpkt;
1463 ret = apply_param_change(avctx, avpkt);
1464 if (ret < 0) {
1465 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1466 if (avctx->err_recognition & AV_EF_EXPLODE)
1467 return ret;
1468 }
1469
1470 av_frame_unref(picture);
1471
1472 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1473 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1474 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1475 avpkt);
1476 else {
1477 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1478 avpkt);
1479 picture->pkt_dts = avpkt->dts;
1480 /* get_buffer is supposed to set frame parameters */
1481 if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1482 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1483 picture->width = avctx->width;
1484 picture->height = avctx->height;
1485 picture->format = avctx->pix_fmt;
1486 }
1487 }
1488
1489 emms_c(); //needed to avoid an emms_c() call before every return;
1490
1491 if (*got_picture_ptr) {
1492 if (!avctx->refcounted_frames) {
1493 int err = unrefcount_frame(avci, picture);
1494 if (err < 0)
1495 return err;
1496 }
1497
1498 avctx->frame_number++;
1499 } else
1500 av_frame_unref(picture);
1501 } else
1502 ret = 0;
1503
1504 return ret;
1505 }
1506
1507 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1508 AVFrame *frame,
1509 int *got_frame_ptr,
1510 AVPacket *avpkt)
1511 {
1512 AVCodecInternal *avci = avctx->internal;
1513 int ret = 0;
1514
1515 *got_frame_ptr = 0;
1516
1517 avctx->internal->pkt = avpkt;
1518
1519 if (!avpkt->data && avpkt->size) {
1520 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1521 return AVERROR(EINVAL);
1522 }
1523
1524 ret = apply_param_change(avctx, avpkt);
1525 if (ret < 0) {
1526 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1527 if (avctx->err_recognition & AV_EF_EXPLODE)
1528 return ret;
1529 }
1530
1531 av_frame_unref(frame);
1532
1533 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1534 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1535 if (ret >= 0 && *got_frame_ptr) {
1536 avctx->frame_number++;
1537 frame->pkt_dts = avpkt->dts;
1538 if (frame->format == AV_SAMPLE_FMT_NONE)
1539 frame->format = avctx->sample_fmt;
1540
1541 if (!avctx->refcounted_frames) {
1542 int err = unrefcount_frame(avci, frame);
1543 if (err < 0)
1544 return err;
1545 }
1546 } else
1547 av_frame_unref(frame);
1548 }
1549
1550
1551 return ret;
1552 }
1553
1554 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1555 int *got_sub_ptr,
1556 AVPacket *avpkt)
1557 {
1558 int ret;
1559
1560 avctx->internal->pkt = avpkt;
1561 *got_sub_ptr = 0;
1562 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1563 if (*got_sub_ptr)
1564 avctx->frame_number++;
1565 return ret;
1566 }
1567
1568 void avsubtitle_free(AVSubtitle *sub)
1569 {
1570 int i;
1571
1572 for (i = 0; i < sub->num_rects; i++) {
1573 av_freep(&sub->rects[i]->pict.data[0]);
1574 av_freep(&sub->rects[i]->pict.data[1]);
1575 av_freep(&sub->rects[i]->pict.data[2]);
1576 av_freep(&sub->rects[i]->pict.data[3]);
1577 av_freep(&sub->rects[i]->text);
1578 av_freep(&sub->rects[i]->ass);
1579 av_freep(&sub->rects[i]);
1580 }
1581
1582 av_freep(&sub->rects);
1583
1584 memset(sub, 0, sizeof(AVSubtitle));
1585 }
1586
1587 av_cold int avcodec_close(AVCodecContext *avctx)
1588 {
1589 /* If there is a user-supplied mutex locking routine, call it. */
1590 if (lockmgr_cb) {
1591 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1592 return -1;
1593 }
1594
1595 entangled_thread_counter++;
1596 if (entangled_thread_counter != 1) {
1597 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1598 entangled_thread_counter--;
1599 return -1;
1600 }
1601
1602 if (avcodec_is_open(avctx)) {
1603 FramePool *pool = avctx->internal->pool;
1604 int i;
1605 if (HAVE_THREADS && avctx->internal->thread_ctx)
1606 ff_thread_free(avctx);
1607 if (avctx->codec && avctx->codec->close)
1608 avctx->codec->close(avctx);
1609 avctx->coded_frame = NULL;
1610 av_frame_free(&avctx->internal->to_free);
1611 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1612 av_buffer_pool_uninit(&pool->pools[i]);
1613 av_freep(&avctx->internal->pool);
1614 av_freep(&avctx->internal);
1615 }
1616
1617 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1618 av_opt_free(avctx->priv_data);
1619 av_opt_free(avctx);
1620 av_freep(&avctx->priv_data);
1621 if (av_codec_is_encoder(avctx->codec))
1622 av_freep(&avctx->extradata);
1623 avctx->codec = NULL;
1624 avctx->active_thread_type = 0;
1625 entangled_thread_counter--;
1626
1627 /* Release any user-supplied mutex. */
1628 if (lockmgr_cb) {
1629 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1630 }
1631 return 0;
1632 }
1633
1634 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1635 {
1636 AVCodec *p, *experimental = NULL;
1637 p = first_avcodec;
1638 while (p) {
1639 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1640 p->id == id) {
1641 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1642 experimental = p;
1643 } else
1644 return p;
1645 }
1646 p = p->next;
1647 }
1648 return experimental;
1649 }
1650
1651 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1652 {
1653 return find_encdec(id, 1);
1654 }
1655
1656 AVCodec *avcodec_find_encoder_by_name(const char *name)
1657 {
1658 AVCodec *p;
1659 if (!name)
1660 return NULL;
1661 p = first_avcodec;
1662 while (p) {
1663 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1664 return p;
1665 p = p->next;
1666 }
1667 return NULL;
1668 }
1669
1670 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1671 {
1672 return find_encdec(id, 0);
1673 }
1674
1675 AVCodec *avcodec_find_decoder_by_name(const char *name)
1676 {
1677 AVCodec *p;
1678 if (!name)
1679 return NULL;
1680 p = first_avcodec;
1681 while (p) {
1682 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1683 return p;
1684 p = p->next;
1685 }
1686 return NULL;
1687 }
1688
1689 static int get_bit_rate(AVCodecContext *ctx)
1690 {
1691 int bit_rate;
1692 int bits_per_sample;
1693
1694 switch (ctx->codec_type) {
1695 case AVMEDIA_TYPE_VIDEO:
1696 case AVMEDIA_TYPE_DATA:
1697 case AVMEDIA_TYPE_SUBTITLE:
1698 case AVMEDIA_TYPE_ATTACHMENT:
1699 bit_rate = ctx->bit_rate;
1700 break;
1701 case AVMEDIA_TYPE_AUDIO:
1702 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1703 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1704 break;
1705 default:
1706 bit_rate = 0;
1707 break;
1708 }
1709 return bit_rate;
1710 }
1711
1712 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1713 {
1714 int i, len, ret = 0;
1715
1716 #define TAG_PRINT(x) \
1717 (((x) >= '0' && (x) <= '9') || \
1718 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1719 ((x) == '.' || (x) == ' '))
1720
1721 for (i = 0; i < 4; i++) {
1722 len = snprintf(buf, buf_size,
1723 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1724 buf += len;
1725 buf_size = buf_size > len ? buf_size - len : 0;
1726 ret += len;
1727 codec_tag >>= 8;
1728 }
1729 return ret;
1730 }
1731
1732 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1733 {
1734 const char *codec_name;
1735 const char *profile = NULL;
1736 const AVCodec *p;
1737 char buf1[32];
1738 int bitrate;
1739 AVRational display_aspect_ratio;
1740
1741 if (enc->codec)
1742 p = enc->codec;
1743 else if (encode)
1744 p = avcodec_find_encoder(enc->codec_id);
1745 else
1746 p = avcodec_find_decoder(enc->codec_id);
1747
1748 if (p) {
1749 codec_name = p->name;
1750 profile = av_get_profile_name(p, enc->profile);
1751 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1752 /* fake mpeg2 transport stream codec (currently not
1753 * registered) */
1754 codec_name = "mpeg2ts";
1755 } else if (enc->codec_name[0] != '\0') {
1756 codec_name = enc->codec_name;
1757 } else {
1758 /* output avi tags */
1759 char tag_buf[32];
1760 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1761 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1762 codec_name = buf1;
1763 }
1764
1765 switch (enc->codec_type) {
1766 case AVMEDIA_TYPE_VIDEO:
1767 snprintf(buf, buf_size,
1768 "Video: %s%s",
1769 codec_name, enc->mb_decision ? " (hq)" : "");
1770 if (profile)
1771 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1772 " (%s)", profile);
1773 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1774 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1775 ", %s",
1776 av_get_pix_fmt_name(enc->pix_fmt));
1777 }
1778 if (enc->width) {
1779 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1780 ", %dx%d",
1781 enc->width, enc->height);
1782 if (enc->sample_aspect_ratio.num) {
1783 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1784 enc->width * enc->sample_aspect_ratio.num,
1785 enc->height * enc->sample_aspect_ratio.den,
1786 1024 * 1024);
1787 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1788 " [PAR %d:%d DAR %d:%d]",
1789 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1790 display_aspect_ratio.num, display_aspect_ratio.den);
1791 }
1792 if (av_log_get_level() >= AV_LOG_DEBUG) {
1793 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1794 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1795 ", %d/%d",
1796 enc->time_base.num / g, enc->time_base.den / g);
1797 }
1798 }
1799 if (encode) {
1800 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1801 ", q=%d-%d", enc->qmin, enc->qmax);
1802 }
1803 break;
1804 case AVMEDIA_TYPE_AUDIO:
1805 snprintf(buf, buf_size,
1806 "Audio: %s",
1807 codec_name);
1808 if (profile)
1809 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1810 " (%s)", profile);
1811 if (enc->sample_rate) {
1812 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1813 ", %d Hz", enc->sample_rate);
1814 }
1815 av_strlcat(buf, ", ", buf_size);
1816 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1817 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1818 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1819 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1820 }
1821 break;
1822 case AVMEDIA_TYPE_DATA:
1823 snprintf(buf, buf_size, "Data: %s", codec_name);
1824 break;
1825 case AVMEDIA_TYPE_SUBTITLE:
1826 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1827 break;
1828 case AVMEDIA_TYPE_ATTACHMENT:
1829 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1830 break;
1831 default:
1832 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1833 return;
1834 }
1835 if (encode) {
1836 if (enc->flags & CODEC_FLAG_PASS1)
1837 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1838 ", pass 1");
1839 if (enc->flags & CODEC_FLAG_PASS2)
1840 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1841 ", pass 2");
1842 }
1843 bitrate = get_bit_rate(enc);
1844 if (bitrate != 0) {
1845 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1846 ", %d kb/s", bitrate / 1000);
1847 }
1848 }
1849
1850 const char *av_get_profile_name(const AVCodec *codec, int profile)
1851 {
1852 const AVProfile *p;
1853 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1854 return NULL;
1855
1856 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1857 if (p->profile == profile)
1858 return p->name;
1859
1860 return NULL;
1861 }
1862
1863 unsigned avcodec_version(void)
1864 {
1865 return LIBAVCODEC_VERSION_INT;
1866 }
1867
1868 const char *avcodec_configuration(void)
1869 {
1870 return LIBAV_CONFIGURATION;
1871 }
1872
1873 const char *avcodec_license(void)
1874 {
1875 #define LICENSE_PREFIX "libavcodec license: "
1876 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1877 }
1878
1879 void avcodec_flush_buffers(AVCodecContext *avctx)
1880 {
1881 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1882 ff_thread_flush(avctx);
1883 else if (avctx->codec->flush)
1884 avctx->codec->flush(avctx);
1885
1886 if (!avctx->refcounted_frames)
1887 av_frame_unref(avctx->internal->to_free);
1888 }
1889
1890 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1891 {
1892 switch (codec_id) {
1893 case AV_CODEC_ID_ADPCM_CT:
1894 case AV_CODEC_ID_ADPCM_IMA_APC:
1895 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1896 case AV_CODEC_ID_ADPCM_IMA_WS:
1897 case AV_CODEC_ID_ADPCM_G722:
1898 case AV_CODEC_ID_ADPCM_YAMAHA:
1899 return 4;
1900 case AV_CODEC_ID_PCM_ALAW:
1901 case AV_CODEC_ID_PCM_MULAW:
1902 case AV_CODEC_ID_PCM_S8:
1903 case AV_CODEC_ID_PCM_U8:
1904 case AV_CODEC_ID_PCM_ZORK:
1905 return 8;
1906 case AV_CODEC_ID_PCM_S16BE:
1907 case AV_CODEC_ID_PCM_S16LE:
1908 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1909 case AV_CODEC_ID_PCM_U16BE:
1910 case AV_CODEC_ID_PCM_U16LE:
1911 return 16;
1912 case AV_CODEC_ID_PCM_S24DAUD:
1913 case AV_CODEC_ID_PCM_S24BE:
1914 case AV_CODEC_ID_PCM_S24LE:
1915 case AV_CODEC_ID_PCM_S24LE_PLANAR:
1916 case AV_CODEC_ID_PCM_U24BE:
1917 case AV_CODEC_ID_PCM_U24LE:
1918 return 24;
1919 case AV_CODEC_ID_PCM_S32BE:
1920 case AV_CODEC_ID_PCM_S32LE:
1921 case AV_CODEC_ID_PCM_S32LE_PLANAR:
1922 case AV_CODEC_ID_PCM_U32BE:
1923 case AV_CODEC_ID_PCM_U32LE:
1924 case AV_CODEC_ID_PCM_F32BE:
1925 case AV_CODEC_ID_PCM_F32LE:
1926 return 32;
1927 case AV_CODEC_ID_PCM_F64BE:
1928 case AV_CODEC_ID_PCM_F64LE:
1929 return 64;
1930 default:
1931 return 0;
1932 }
1933 }
1934
1935 int av_get_bits_per_sample(enum AVCodecID codec_id)
1936 {
1937 switch (codec_id) {
1938 case AV_CODEC_ID_ADPCM_SBPRO_2:
1939 return 2;
1940 case AV_CODEC_ID_ADPCM_SBPRO_3:
1941 return 3;
1942 case AV_CODEC_ID_ADPCM_SBPRO_4:
1943 case AV_CODEC_ID_ADPCM_IMA_WAV:
1944 case AV_CODEC_ID_ADPCM_IMA_QT:
1945 case AV_CODEC_ID_ADPCM_SWF:
1946 case AV_CODEC_ID_ADPCM_MS:
1947 return 4;
1948 default:
1949 return av_get_exact_bits_per_sample(codec_id);
1950 }
1951 }
1952
1953 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1954 {
1955 int id, sr, ch, ba, tag, bps;
1956
1957 id = avctx->codec_id;
1958 sr = avctx->sample_rate;
1959 ch = avctx->channels;
1960 ba = avctx->block_align;
1961 tag = avctx->codec_tag;
1962 bps = av_get_exact_bits_per_sample(avctx->codec_id);
1963
1964 /* codecs with an exact constant bits per sample */
1965 if (bps > 0 && ch > 0 && frame_bytes > 0)
1966 return (frame_bytes * 8) / (bps * ch);
1967 bps = avctx->bits_per_coded_sample;
1968
1969 /* codecs with a fixed packet duration */
1970 switch (id) {
1971 case AV_CODEC_ID_ADPCM_ADX: return 32;
1972 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
1973 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
1974 case AV_CODEC_ID_AMR_NB:
1975 case AV_CODEC_ID_GSM:
1976 case AV_CODEC_ID_QCELP:
1977 case AV_CODEC_ID_RA_144:
1978 case AV_CODEC_ID_RA_288: return 160;
1979 case AV_CODEC_ID_IMC: return 256;
1980 case AV_CODEC_ID_AMR_WB:
1981 case AV_CODEC_ID_GSM_MS: return 320;
1982 case AV_CODEC_ID_MP1: return 384;
1983 case AV_CODEC_ID_ATRAC1: return 512;
1984 case AV_CODEC_ID_ATRAC3: return 1024;
1985 case AV_CODEC_ID_MP2:
1986 case AV_CODEC_ID_MUSEPACK7: return 1152;
1987 case AV_CODEC_ID_AC3: return 1536;
1988 }
1989
1990 if (sr > 0) {
1991 /* calc from sample rate */
1992 if (id == AV_CODEC_ID_TTA)
1993 return 256 * sr / 245;
1994
1995 if (ch > 0) {
1996 /* calc from sample rate and channels */
1997 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
1998 return (480 << (sr / 22050)) / ch;
1999 }
2000 }
2001
2002 if (ba > 0) {
2003 /* calc from block_align */
2004 if (id == AV_CODEC_ID_SIPR) {
2005 switch (ba) {
2006 case 20: return 160;
2007 case 19: return 144;
2008 case 29: return 288;
2009 case 37: return 480;
2010 }
2011 } else if (id == AV_CODEC_ID_ILBC) {
2012 switch (ba) {
2013 case 38: return 160;
2014 case 50: return 240;
2015 }
2016 }
2017 }
2018
2019 if (frame_bytes > 0) {
2020 /* calc from frame_bytes only */
2021 if (id == AV_CODEC_ID_TRUESPEECH)
2022 return 240 * (frame_bytes / 32);
2023 if (id == AV_CODEC_ID_NELLYMOSER)
2024 return 256 * (frame_bytes / 64);
2025
2026 if (bps > 0) {
2027 /* calc from frame_bytes and bits_per_coded_sample */
2028 if (id == AV_CODEC_ID_ADPCM_G726)
2029 return frame_bytes * 8 / bps;
2030 }
2031
2032 if (ch > 0) {
2033 /* calc from frame_bytes and channels */
2034 switch (id) {
2035 case AV_CODEC_ID_ADPCM_4XM:
2036 case AV_CODEC_ID_ADPCM_IMA_ISS:
2037 return (frame_bytes - 4 * ch) * 2 / ch;
2038 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
2039 return (frame_bytes - 4) * 2 / ch;
2040 case AV_CODEC_ID_ADPCM_IMA_AMV:
2041 return (frame_bytes - 8) * 2 / ch;
2042 case AV_CODEC_ID_ADPCM_XA:
2043 return (frame_bytes / 128) * 224 / ch;
2044 case AV_CODEC_ID_INTERPLAY_DPCM:
2045 return (frame_bytes - 6 - ch) / ch;
2046 case AV_CODEC_ID_ROQ_DPCM:
2047 return (frame_bytes - 8) / ch;
2048 case AV_CODEC_ID_XAN_DPCM:
2049 return (frame_bytes - 2 * ch) / ch;
2050 case AV_CODEC_ID_MACE3:
2051 return 3 * frame_bytes / ch;
2052 case AV_CODEC_ID_MACE6:
2053 return 6 * frame_bytes / ch;
2054 case AV_CODEC_ID_PCM_LXF:
2055 return 2 * (frame_bytes / (5 * ch));
2056 }
2057
2058 if (tag) {
2059 /* calc from frame_bytes, channels, and codec_tag */
2060 if (id == AV_CODEC_ID_SOL_DPCM) {
2061 if (tag == 3)
2062 return frame_bytes / ch;
2063 else
2064 return frame_bytes * 2 / ch;
2065 }
2066 }
2067
2068 if (ba > 0) {
2069 /* calc from frame_bytes, channels, and block_align */
2070 int blocks = frame_bytes / ba;
2071 switch (avctx->codec_id) {
2072 case AV_CODEC_ID_ADPCM_IMA_WAV:
2073 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2074 case AV_CODEC_ID_ADPCM_IMA_DK3:
2075 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2076 case AV_CODEC_ID_ADPCM_IMA_DK4:
2077 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2078 case AV_CODEC_ID_ADPCM_MS:
2079 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2080 }
2081 }
2082
2083 if (bps > 0) {
2084 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2085 switch (avctx->codec_id) {
2086 case AV_CODEC_ID_PCM_DVD:
2087 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2088 case AV_CODEC_ID_PCM_BLURAY:
2089 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2090 case AV_CODEC_ID_S302M:
2091 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2092 }
2093 }
2094 }
2095 }
2096
2097 return 0;
2098 }
2099
2100 #if !HAVE_THREADS
2101 int ff_thread_init(AVCodecContext *s)
2102 {
2103 return -1;
2104 }
2105
2106 #endif
2107
2108 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2109 {
2110 unsigned int n = 0;
2111
2112 while (v >= 0xff) {
2113 *s++ = 0xff;
2114 v -= 0xff;
2115 n++;
2116 }
2117 *s = v;
2118 n++;
2119 return n;
2120 }
2121
2122 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2123 {
2124 int i;
2125 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2126 return i;
2127 }
2128
2129 #if FF_API_MISSING_SAMPLE
2130 FF_DISABLE_DEPRECATION_WARNINGS
2131 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2132 {
2133 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2134 "version to the newest one from Git. If the problem still "
2135 "occurs, it means that your file has a feature which has not "
2136 "been implemented.\n", feature);
2137 if(want_sample)
2138 av_log_ask_for_sample(avc, NULL);
2139 }
2140
2141 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2142 {
2143 va_list argument_list;
2144
2145 va_start(argument_list, msg);
2146
2147 if (msg)
2148 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2149 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2150 "of this file to ftp://upload.libav.org/incoming/ "
2151 "and contact the libav-devel mailing list.\n");
2152
2153 va_end(argument_list);
2154 }
2155 FF_ENABLE_DEPRECATION_WARNINGS
2156 #endif /* FF_API_MISSING_SAMPLE */
2157
2158 static AVHWAccel *first_hwaccel = NULL;
2159
2160 void av_register_hwaccel(AVHWAccel *hwaccel)
2161 {
2162 AVHWAccel **p = &first_hwaccel;
2163 while (*p)
2164 p = &(*p)->next;
2165 *p = hwaccel;
2166 hwaccel->next = NULL;
2167 }
2168
2169 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2170 {
2171 return hwaccel ? hwaccel->next : first_hwaccel;
2172 }
2173
2174 AVHWAccel *ff_find_hwaccel(AVCodecContext *avctx)
2175 {
2176 enum AVCodecID codec_id = avctx->codec->id;
2177 enum AVPixelFormat pix_fmt = avctx->pix_fmt;
2178
2179 AVHWAccel *hwaccel = NULL;
2180
2181 while ((hwaccel = av_hwaccel_next(hwaccel)))
2182 if (hwaccel->id == codec_id
2183 && hwaccel->pix_fmt == pix_fmt)
2184 return hwaccel;
2185 return NULL;
2186 }
2187
2188 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2189 {
2190 if (lockmgr_cb) {
2191 if (lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2192 return -1;
2193 if (lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2194 return -1;
2195 }
2196
2197 lockmgr_cb = cb;
2198
2199 if (lockmgr_cb) {
2200 if (lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2201 return -1;
2202 if (lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2203 return -1;
2204 }
2205 return 0;
2206 }
2207
2208 int avpriv_lock_avformat(void)
2209 {
2210 if (lockmgr_cb) {
2211 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2212 return -1;
2213 }
2214 return 0;
2215 }
2216
2217 int avpriv_unlock_avformat(void)
2218 {
2219 if (lockmgr_cb) {
2220 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2221 return -1;
2222 }
2223 return 0;
2224 }
2225
2226 unsigned int avpriv_toupper4(unsigned int x)
2227 {
2228 return av_toupper(x & 0xFF) +
2229 (av_toupper((x >> 8) & 0xFF) << 8) +
2230 (av_toupper((x >> 16) & 0xFF) << 16) +
2231 (av_toupper((x >> 24) & 0xFF) << 24);
2232 }
2233
2234 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2235 {
2236 int ret;
2237
2238 dst->owner = src->owner;
2239
2240 ret = av_frame_ref(dst->f, src->f);
2241 if (ret < 0)
2242 return ret;
2243
2244 if (src->progress &&
2245 !(dst->progress = av_buffer_ref(src->progress))) {
2246 ff_thread_release_buffer(dst->owner, dst);
2247 return AVERROR(ENOMEM);
2248 }
2249
2250 return 0;
2251 }
2252
2253 #if !HAVE_THREADS
2254
2255 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
2256 {
2257 f->owner = avctx;
2258 return ff_get_buffer(avctx, f->f, flags);
2259 }
2260
2261 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
2262 {
2263 av_frame_unref(f->f);
2264 }
2265
2266 void ff_thread_finish_setup(AVCodecContext *avctx)
2267 {
2268 }
2269
2270 void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
2271 {
2272 }
2273
2274 void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
2275 {
2276 }
2277
2278 #endif
2279
2280 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2281 {
2282 if (codec_id <= AV_CODEC_ID_NONE)
2283 return AVMEDIA_TYPE_UNKNOWN;
2284 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2285 return AVMEDIA_TYPE_VIDEO;
2286 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2287 return AVMEDIA_TYPE_AUDIO;
2288 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2289 return AVMEDIA_TYPE_SUBTITLE;
2290
2291 return AVMEDIA_TYPE_UNKNOWN;
2292 }
2293
2294 int avcodec_is_open(AVCodecContext *s)
2295 {
2296 return !!s->internal;
2297 }
2298
2299 const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
2300 const uint8_t *end,
2301 uint32_t * restrict state)
2302 {
2303 int i;
2304
2305 assert(p <= end);
2306 if (p >= end)
2307 return end;
2308
2309 for (i = 0; i < 3; i++) {
2310 uint32_t tmp = *state << 8;
2311 *state = tmp + *(p++);
2312 if (tmp == 0x100 || p == end)
2313 return p;
2314 }
2315
2316 while (p < end) {
2317 if (p[-1] > 1 ) p += 3;
2318 else if (p[-2] ) p += 2;
2319 else if (p[-3]|(p[-1]-1)) p++;
2320 else {
2321 p++;
2322 break;
2323 }
2324 }
2325
2326 p = FFMIN(p, end) - 4;
2327 *state = AV_RB32(p);
2328
2329 return p + 4;
2330 }