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