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d21ca0eeceec186b67ce2d6788034e1b87fe3126
[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 unsigned avcodec_get_edge_width(void)
131 {
132 return EDGE_WIDTH;
133 }
134
135 #if FF_API_SET_DIMENSIONS
136 void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
137 {
138 ff_set_dimensions(s, width, height);
139 }
140 #endif
141
142 int ff_set_dimensions(AVCodecContext *s, int width, int height)
143 {
144 int ret = av_image_check_size(width, height, 0, s);
145
146 if (ret < 0)
147 width = height = 0;
148 s->width = s->coded_width = width;
149 s->height = s->coded_height = height;
150
151 return ret;
152 }
153
154 #if HAVE_NEON || ARCH_PPC || HAVE_MMX
155 # define STRIDE_ALIGN 16
156 #else
157 # define STRIDE_ALIGN 8
158 #endif
159
160 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
161 int linesize_align[AV_NUM_DATA_POINTERS])
162 {
163 int i;
164 int w_align = 1;
165 int h_align = 1;
166
167 switch (s->pix_fmt) {
168 case AV_PIX_FMT_YUV420P:
169 case AV_PIX_FMT_YUYV422:
170 case AV_PIX_FMT_UYVY422:
171 case AV_PIX_FMT_YUV422P:
172 case AV_PIX_FMT_YUV440P:
173 case AV_PIX_FMT_YUV444P:
174 case AV_PIX_FMT_GBRP:
175 case AV_PIX_FMT_GRAY8:
176 case AV_PIX_FMT_GRAY16BE:
177 case AV_PIX_FMT_GRAY16LE:
178 case AV_PIX_FMT_YUVJ420P:
179 case AV_PIX_FMT_YUVJ422P:
180 case AV_PIX_FMT_YUVJ440P:
181 case AV_PIX_FMT_YUVJ444P:
182 case AV_PIX_FMT_YUVA420P:
183 case AV_PIX_FMT_YUVA422P:
184 case AV_PIX_FMT_YUVA444P:
185 case AV_PIX_FMT_YUV420P9LE:
186 case AV_PIX_FMT_YUV420P9BE:
187 case AV_PIX_FMT_YUV420P10LE:
188 case AV_PIX_FMT_YUV420P10BE:
189 case AV_PIX_FMT_YUV422P9LE:
190 case AV_PIX_FMT_YUV422P9BE:
191 case AV_PIX_FMT_YUV422P10LE:
192 case AV_PIX_FMT_YUV422P10BE:
193 case AV_PIX_FMT_YUV444P9LE:
194 case AV_PIX_FMT_YUV444P9BE:
195 case AV_PIX_FMT_YUV444P10LE:
196 case AV_PIX_FMT_YUV444P10BE:
197 case AV_PIX_FMT_GBRP9LE:
198 case AV_PIX_FMT_GBRP9BE:
199 case AV_PIX_FMT_GBRP10LE:
200 case AV_PIX_FMT_GBRP10BE:
201 w_align = 16; //FIXME assume 16 pixel per macroblock
202 h_align = 16 * 2; // interlaced needs 2 macroblocks height
203 break;
204 case AV_PIX_FMT_YUV411P:
205 case AV_PIX_FMT_UYYVYY411:
206 w_align = 32;
207 h_align = 8;
208 break;
209 case AV_PIX_FMT_YUV410P:
210 if (s->codec_id == AV_CODEC_ID_SVQ1) {
211 w_align = 64;
212 h_align = 64;
213 }
214 case AV_PIX_FMT_RGB555:
215 if (s->codec_id == AV_CODEC_ID_RPZA) {
216 w_align = 4;
217 h_align = 4;
218 }
219 case AV_PIX_FMT_PAL8:
220 case AV_PIX_FMT_BGR8:
221 case AV_PIX_FMT_RGB8:
222 if (s->codec_id == AV_CODEC_ID_SMC) {
223 w_align = 4;
224 h_align = 4;
225 }
226 break;
227 case AV_PIX_FMT_BGR24:
228 if ((s->codec_id == AV_CODEC_ID_MSZH) ||
229 (s->codec_id == AV_CODEC_ID_ZLIB)) {
230 w_align = 4;
231 h_align = 4;
232 }
233 break;
234 default:
235 w_align = 1;
236 h_align = 1;
237 break;
238 }
239
240 *width = FFALIGN(*width, w_align);
241 *height = FFALIGN(*height, h_align);
242 if (s->codec_id == AV_CODEC_ID_H264)
243 // some of the optimized chroma MC reads one line too much
244 *height += 2;
245
246 for (i = 0; i < 4; i++)
247 linesize_align[i] = STRIDE_ALIGN;
248 }
249
250 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
251 {
252 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
253 int chroma_shift = desc->log2_chroma_w;
254 int linesize_align[AV_NUM_DATA_POINTERS];
255 int align;
256
257 avcodec_align_dimensions2(s, width, height, linesize_align);
258 align = FFMAX(linesize_align[0], linesize_align[3]);
259 linesize_align[1] <<= chroma_shift;
260 linesize_align[2] <<= chroma_shift;
261 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
262 *width = FFALIGN(*width, align);
263 }
264
265 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
266 enum AVSampleFormat sample_fmt, const uint8_t *buf,
267 int buf_size, int align)
268 {
269 int ch, planar, needed_size, ret = 0;
270
271 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
272 frame->nb_samples, sample_fmt,
273 align);
274 if (buf_size < needed_size)
275 return AVERROR(EINVAL);
276
277 planar = av_sample_fmt_is_planar(sample_fmt);
278 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
279 if (!(frame->extended_data = av_mallocz(nb_channels *
280 sizeof(*frame->extended_data))))
281 return AVERROR(ENOMEM);
282 } else {
283 frame->extended_data = frame->data;
284 }
285
286 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
287 buf, nb_channels, frame->nb_samples,
288 sample_fmt, align)) < 0) {
289 if (frame->extended_data != frame->data)
290 av_free(frame->extended_data);
291 return ret;
292 }
293 if (frame->extended_data != frame->data) {
294 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
295 frame->data[ch] = frame->extended_data[ch];
296 }
297
298 return ret;
299 }
300
301 static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
302 {
303 FramePool *pool = avctx->internal->pool;
304 int i, ret;
305
306 switch (avctx->codec_type) {
307 case AVMEDIA_TYPE_VIDEO: {
308 AVPicture picture;
309 int size[4] = { 0 };
310 int w = frame->width;
311 int h = frame->height;
312 int tmpsize, unaligned;
313
314 if (pool->format == frame->format &&
315 pool->width == frame->width && pool->height == frame->height)
316 return 0;
317
318 avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
319
320 if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
321 w += EDGE_WIDTH * 2;
322 h += EDGE_WIDTH * 2;
323 }
324
325 do {
326 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
327 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
328 av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
329 // increase alignment of w for next try (rhs gives the lowest bit set in w)
330 w += w & ~(w - 1);
331
332 unaligned = 0;
333 for (i = 0; i < 4; i++)
334 unaligned |= picture.linesize[i] % pool->stride_align[i];
335 } while (unaligned);
336
337 tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
338 NULL, picture.linesize);
339 if (tmpsize < 0)
340 return -1;
341
342 for (i = 0; i < 3 && picture.data[i + 1]; i++)
343 size[i] = picture.data[i + 1] - picture.data[i];
344 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
345
346 for (i = 0; i < 4; i++) {
347 av_buffer_pool_uninit(&pool->pools[i]);
348 pool->linesize[i] = picture.linesize[i];
349 if (size[i]) {
350 pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
351 if (!pool->pools[i]) {
352 ret = AVERROR(ENOMEM);
353 goto fail;
354 }
355 }
356 }
357 pool->format = frame->format;
358 pool->width = frame->width;
359 pool->height = frame->height;
360
361 break;
362 }
363 case AVMEDIA_TYPE_AUDIO: {
364 int ch = av_get_channel_layout_nb_channels(frame->channel_layout);
365 int planar = av_sample_fmt_is_planar(frame->format);
366 int planes = planar ? ch : 1;
367
368 if (pool->format == frame->format && pool->planes == planes &&
369 pool->channels == ch && frame->nb_samples == pool->samples)
370 return 0;
371
372 av_buffer_pool_uninit(&pool->pools[0]);
373 ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
374 frame->nb_samples, frame->format, 0);
375 if (ret < 0)
376 goto fail;
377
378 pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
379 if (!pool->pools[0]) {
380 ret = AVERROR(ENOMEM);
381 goto fail;
382 }
383
384 pool->format = frame->format;
385 pool->planes = planes;
386 pool->channels = ch;
387 pool->samples = frame->nb_samples;
388 break;
389 }
390 default: av_assert0(0);
391 }
392 return 0;
393 fail:
394 for (i = 0; i < 4; i++)
395 av_buffer_pool_uninit(&pool->pools[i]);
396 pool->format = -1;
397 pool->planes = pool->channels = pool->samples = 0;
398 pool->width = pool->height = 0;
399 return ret;
400 }
401
402 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
403 {
404 FramePool *pool = avctx->internal->pool;
405 int planes = pool->planes;
406 int i;
407
408 frame->linesize[0] = pool->linesize[0];
409
410 if (planes > AV_NUM_DATA_POINTERS) {
411 frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
412 frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
413 frame->extended_buf = av_mallocz(frame->nb_extended_buf *
414 sizeof(*frame->extended_buf));
415 if (!frame->extended_data || !frame->extended_buf) {
416 av_freep(&frame->extended_data);
417 av_freep(&frame->extended_buf);
418 return AVERROR(ENOMEM);
419 }
420 } else
421 frame->extended_data = frame->data;
422
423 for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
424 frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
425 if (!frame->buf[i])
426 goto fail;
427 frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
428 }
429 for (i = 0; i < frame->nb_extended_buf; i++) {
430 frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
431 if (!frame->extended_buf[i])
432 goto fail;
433 frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
434 }
435
436 if (avctx->debug & FF_DEBUG_BUFFERS)
437 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
438
439 return 0;
440 fail:
441 av_frame_unref(frame);
442 return AVERROR(ENOMEM);
443 }
444
445 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
446 {
447 FramePool *pool = s->internal->pool;
448 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
449 int pixel_size = desc->comp[0].step_minus1 + 1;
450 int h_chroma_shift, v_chroma_shift;
451 int i;
452
453 if (pic->data[0] != NULL) {
454 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
455 return -1;
456 }
457
458 memset(pic->data, 0, sizeof(pic->data));
459 pic->extended_data = pic->data;
460
461 av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
462
463 for (i = 0; i < 4 && pool->pools[i]; i++) {
464 const int h_shift = i == 0 ? 0 : h_chroma_shift;
465 const int v_shift = i == 0 ? 0 : v_chroma_shift;
466
467 pic->linesize[i] = pool->linesize[i];
468
469 pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
470 if (!pic->buf[i])
471 goto fail;
472
473 // no edge if EDGE EMU or not planar YUV
474 if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
475 pic->data[i] = pic->buf[i]->data;
476 else {
477 pic->data[i] = pic->buf[i]->data +
478 FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
479 (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
480 }
481 }
482 for (; i < AV_NUM_DATA_POINTERS; i++) {
483 pic->data[i] = NULL;
484 pic->linesize[i] = 0;
485 }
486 if (pic->data[1] && !pic->data[2])
487 avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
488
489 if (s->debug & FF_DEBUG_BUFFERS)
490 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
491
492 return 0;
493 fail:
494 av_frame_unref(pic);
495 return AVERROR(ENOMEM);
496 }
497
498 int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
499 {
500 int ret;
501
502 if ((ret = update_frame_pool(avctx, frame)) < 0)
503 return ret;
504
505 #if FF_API_GET_BUFFER
506 FF_DISABLE_DEPRECATION_WARNINGS
507 frame->type = FF_BUFFER_TYPE_INTERNAL;
508 FF_ENABLE_DEPRECATION_WARNINGS
509 #endif
510
511 switch (avctx->codec_type) {
512 case AVMEDIA_TYPE_VIDEO:
513 return video_get_buffer(avctx, frame);
514 case AVMEDIA_TYPE_AUDIO:
515 return audio_get_buffer(avctx, frame);
516 default:
517 return -1;
518 }
519 }
520
521 #if FF_API_GET_BUFFER
522 FF_DISABLE_DEPRECATION_WARNINGS
523 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
524 {
525 return avcodec_default_get_buffer2(avctx, frame, 0);
526 }
527
528 typedef struct CompatReleaseBufPriv {
529 AVCodecContext avctx;
530 AVFrame frame;
531 } CompatReleaseBufPriv;
532
533 static void compat_free_buffer(void *opaque, uint8_t *data)
534 {
535 CompatReleaseBufPriv *priv = opaque;
536 if (priv->avctx.release_buffer)
537 priv->avctx.release_buffer(&priv->avctx, &priv->frame);
538 av_freep(&priv);
539 }
540
541 static void compat_release_buffer(void *opaque, uint8_t *data)
542 {
543 AVBufferRef *buf = opaque;
544 av_buffer_unref(&buf);
545 }
546 FF_ENABLE_DEPRECATION_WARNINGS
547 #endif
548
549 int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
550 {
551 int ret;
552
553 switch (avctx->codec_type) {
554 case AVMEDIA_TYPE_VIDEO:
555 frame->width = FFMAX(avctx->width, avctx->coded_width);
556 frame->height = FFMAX(avctx->height, avctx->coded_height);
557 if (frame->format < 0)
558 frame->format = avctx->pix_fmt;
559 if (!frame->sample_aspect_ratio.num)
560 frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
561
562 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
563 return ret;
564 break;
565 case AVMEDIA_TYPE_AUDIO:
566 if (!frame->sample_rate)
567 frame->sample_rate = avctx->sample_rate;
568 if (frame->format < 0)
569 frame->format = avctx->sample_fmt;
570 if (!frame->channel_layout) {
571 if (avctx->channel_layout) {
572 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
573 avctx->channels) {
574 av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
575 "configuration.\n");
576 return AVERROR(EINVAL);
577 }
578
579 frame->channel_layout = avctx->channel_layout;
580 } else {
581 if (avctx->channels > FF_SANE_NB_CHANNELS) {
582 av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
583 avctx->channels);
584 return AVERROR(ENOSYS);
585 }
586
587 frame->channel_layout = av_get_default_channel_layout(avctx->channels);
588 if (!frame->channel_layout)
589 frame->channel_layout = (1ULL << avctx->channels) - 1;
590 }
591 }
592 break;
593 default: return AVERROR(EINVAL);
594 }
595
596 frame->pkt_pts = avctx->internal->pkt ? avctx->internal->pkt->pts : AV_NOPTS_VALUE;
597 frame->reordered_opaque = avctx->reordered_opaque;
598
599 #if FF_API_GET_BUFFER
600 FF_DISABLE_DEPRECATION_WARNINGS
601 /*
602 * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
603 * We wrap each plane in its own AVBuffer. Each of those has a reference to
604 * a dummy AVBuffer as its private data, unreffing it on free.
605 * When all the planes are freed, the dummy buffer's free callback calls
606 * release_buffer().
607 */
608 if (avctx->get_buffer) {
609 CompatReleaseBufPriv *priv = NULL;
610 AVBufferRef *dummy_buf = NULL;
611 int planes, i, ret;
612
613 if (flags & AV_GET_BUFFER_FLAG_REF)
614 frame->reference = 1;
615
616 ret = avctx->get_buffer(avctx, frame);
617 if (ret < 0)
618 return ret;
619
620 /* return if the buffers are already set up
621 * this would happen e.g. when a custom get_buffer() calls
622 * avcodec_default_get_buffer
623 */
624 if (frame->buf[0])
625 return 0;
626
627 priv = av_mallocz(sizeof(*priv));
628 if (!priv) {
629 ret = AVERROR(ENOMEM);
630 goto fail;
631 }
632 priv->avctx = *avctx;
633 priv->frame = *frame;
634
635 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
636 if (!dummy_buf) {
637 ret = AVERROR(ENOMEM);
638 goto fail;
639 }
640
641 #define WRAP_PLANE(ref_out, data, data_size) \
642 do { \
643 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
644 if (!dummy_ref) { \
645 ret = AVERROR(ENOMEM); \
646 goto fail; \
647 } \
648 ref_out = av_buffer_create(data, data_size, compat_release_buffer, \
649 dummy_ref, 0); \
650 if (!ref_out) { \
651 av_frame_unref(frame); \
652 ret = AVERROR(ENOMEM); \
653 goto fail; \
654 } \
655 } while (0)
656
657 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
658 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
659
660 planes = av_pix_fmt_count_planes(frame->format);
661 /* workaround for AVHWAccel plane count of 0, buf[0] is used as
662 check for allocated buffers: make libavcodec happy */
663 if (desc && desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
664 planes = 1;
665 if (!desc || planes <= 0) {
666 ret = AVERROR(EINVAL);
667 goto fail;
668 }
669
670 for (i = 0; i < planes; i++) {
671 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
672 int plane_size = (frame->height >> v_shift) * frame->linesize[i];
673
674 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
675 }
676 } else {
677 int planar = av_sample_fmt_is_planar(frame->format);
678 planes = planar ? avctx->channels : 1;
679
680 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
681 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
682 frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
683 frame->nb_extended_buf);
684 if (!frame->extended_buf) {
685 ret = AVERROR(ENOMEM);
686 goto fail;
687 }
688 }
689
690 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
691 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
692
693 for (i = 0; i < frame->nb_extended_buf; i++)
694 WRAP_PLANE(frame->extended_buf[i],
695 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
696 frame->linesize[0]);
697 }
698
699 av_buffer_unref(&dummy_buf);
700
701 frame->width = avctx->width;
702 frame->height = avctx->height;
703
704 return 0;
705
706 fail:
707 avctx->release_buffer(avctx, frame);
708 av_freep(&priv);
709 av_buffer_unref(&dummy_buf);
710 return ret;
711 }
712 FF_ENABLE_DEPRECATION_WARNINGS
713 #endif
714
715 ret = avctx->get_buffer2(avctx, frame, flags);
716
717 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
718 frame->width = avctx->width;
719 frame->height = avctx->height;
720 }
721
722 return ret;
723 }
724
725 int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
726 {
727 AVFrame tmp;
728 int ret;
729
730 av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
731
732 if (!frame->data[0])
733 return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
734
735 if (av_frame_is_writable(frame))
736 return 0;
737
738 av_frame_move_ref(&tmp, frame);
739
740 ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
741 if (ret < 0) {
742 av_frame_unref(&tmp);
743 return ret;
744 }
745
746 av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
747 frame->format, frame->width, frame->height);
748
749 av_frame_unref(&tmp);
750
751 return 0;
752 }
753
754 #if FF_API_GET_BUFFER
755 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
756 {
757 av_frame_unref(pic);
758 }
759
760 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
761 {
762 av_assert0(0);
763 return AVERROR_BUG;
764 }
765 #endif
766
767 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
768 {
769 int i;
770
771 for (i = 0; i < count; i++) {
772 int r = func(c, (char *)arg + i * size);
773 if (ret)
774 ret[i] = r;
775 }
776 return 0;
777 }
778
779 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
780 {
781 int i;
782
783 for (i = 0; i < count; i++) {
784 int r = func(c, arg, i, 0);
785 if (ret)
786 ret[i] = r;
787 }
788 return 0;
789 }
790
791 static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
792 {
793 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
794 return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
795 }
796
797 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
798 {
799 while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
800 ++fmt;
801 return fmt[0];
802 }
803
804 void avcodec_get_frame_defaults(AVFrame *frame)
805 {
806 if (frame->extended_data != frame->data)
807 av_freep(&frame->extended_data);
808
809 memset(frame, 0, sizeof(AVFrame));
810
811 frame->pts = AV_NOPTS_VALUE;
812 frame->key_frame = 1;
813 frame->sample_aspect_ratio = (AVRational) {0, 1 };
814 frame->format = -1; /* unknown */
815 frame->extended_data = frame->data;
816 }
817
818 #if FF_API_AVFRAME_LAVC
819 AVFrame *avcodec_alloc_frame(void)
820 {
821 AVFrame *frame = av_mallocz(sizeof(AVFrame));
822
823 if (frame == NULL)
824 return NULL;
825
826 avcodec_get_frame_defaults(frame);
827
828 return frame;
829 }
830 #endif
831
832 void avcodec_free_frame(AVFrame **frame)
833 {
834 AVFrame *f;
835
836 if (!frame || !*frame)
837 return;
838
839 f = *frame;
840
841 if (f->extended_data != f->data)
842 av_freep(&f->extended_data);
843
844 av_freep(frame);
845 }
846
847 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
848 {
849 int ret = 0;
850 AVDictionary *tmp = NULL;
851
852 if (avcodec_is_open(avctx))
853 return 0;
854
855 if ((!codec && !avctx->codec)) {
856 av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
857 return AVERROR(EINVAL);
858 }
859 if ((codec && avctx->codec && codec != avctx->codec)) {
860 av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
861 "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
862 return AVERROR(EINVAL);
863 }
864 if (!codec)
865 codec = avctx->codec;
866
867 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
868 return AVERROR(EINVAL);
869
870 if (options)
871 av_dict_copy(&tmp, *options, 0);
872
873 /* If there is a user-supplied mutex locking routine, call it. */
874 if (lockmgr_cb) {
875 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
876 return -1;
877 }
878
879 entangled_thread_counter++;
880 if (entangled_thread_counter != 1) {
881 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
882 ret = -1;
883 goto end;
884 }
885
886 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
887 if (!avctx->internal) {
888 ret = AVERROR(ENOMEM);
889 goto end;
890 }
891
892 avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
893 if (!avctx->internal->pool) {
894 ret = AVERROR(ENOMEM);
895 goto free_and_end;
896 }
897
898 if (codec->priv_data_size > 0) {
899 if (!avctx->priv_data) {
900 avctx->priv_data = av_mallocz(codec->priv_data_size);
901 if (!avctx->priv_data) {
902 ret = AVERROR(ENOMEM);
903 goto end;
904 }
905 if (codec->priv_class) {
906 *(const AVClass **)avctx->priv_data = codec->priv_class;
907 av_opt_set_defaults(avctx->priv_data);
908 }
909 }
910 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
911 goto free_and_end;
912 } else {
913 avctx->priv_data = NULL;
914 }
915 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
916 goto free_and_end;
917
918 if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)
919 ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
920 else if (avctx->width && avctx->height)
921 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
922 if (ret < 0)
923 goto free_and_end;
924
925 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
926 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
927 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
928 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
929 ff_set_dimensions(avctx, 0, 0);
930 }
931
932 /* if the decoder init function was already called previously,
933 * free the already allocated subtitle_header before overwriting it */
934 if (av_codec_is_decoder(codec))
935 av_freep(&avctx->subtitle_header);
936
937 if (avctx->channels > FF_SANE_NB_CHANNELS) {
938 ret = AVERROR(EINVAL);
939 goto free_and_end;
940 }
941
942 avctx->codec = codec;
943 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
944 avctx->codec_id == AV_CODEC_ID_NONE) {
945 avctx->codec_type = codec->type;
946 avctx->codec_id = codec->id;
947 }
948 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
949 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
950 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
951 ret = AVERROR(EINVAL);
952 goto free_and_end;
953 }
954 avctx->frame_number = 0;
955
956 if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
957 avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
958 ret = AVERROR_EXPERIMENTAL;
959 goto free_and_end;
960 }
961
962 if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
963 (!avctx->time_base.num || !avctx->time_base.den)) {
964 avctx->time_base.num = 1;
965 avctx->time_base.den = avctx->sample_rate;
966 }
967
968 if (HAVE_THREADS) {
969 ret = ff_thread_init(avctx);
970 if (ret < 0) {
971 goto free_and_end;
972 }
973 }
974 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
975 avctx->thread_count = 1;
976
977 if (av_codec_is_encoder(avctx->codec)) {
978 int i;
979 if (avctx->codec->sample_fmts) {
980 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
981 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
982 break;
983 if (avctx->channels == 1 &&
984 av_get_planar_sample_fmt(avctx->sample_fmt) ==
985 av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
986 avctx->sample_fmt = avctx->codec->sample_fmts[i];
987 break;
988 }
989 }
990 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
991 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
992 ret = AVERROR(EINVAL);
993 goto free_and_end;
994 }
995 }
996 if (avctx->codec->pix_fmts) {
997 for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
998 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
999 break;
1000 if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
1001 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");
1002 ret = AVERROR(EINVAL);
1003 goto free_and_end;
1004 }
1005 }
1006 if (avctx->codec->supported_samplerates) {
1007 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1008 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1009 break;
1010 if (avctx->codec->supported_samplerates[i] == 0) {
1011 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
1012 ret = AVERROR(EINVAL);
1013 goto free_and_end;
1014 }
1015 }
1016 if (avctx->codec->channel_layouts) {
1017 if (!avctx->channel_layout) {
1018 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
1019 } else {
1020 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1021 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1022 break;
1023 if (avctx->codec->channel_layouts[i] == 0) {
1024 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
1025 ret = AVERROR(EINVAL);
1026 goto free_and_end;
1027 }
1028 }
1029 }
1030 if (avctx->channel_layout && avctx->channels) {
1031 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
1032 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
1033 ret = AVERROR(EINVAL);
1034 goto free_and_end;
1035 }
1036 } else if (avctx->channel_layout) {
1037 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1038 }
1039
1040 if (!avctx->rc_initial_buffer_occupancy)
1041 avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1042 }
1043
1044 if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {
1045 ret = avctx->codec->init(avctx);
1046 if (ret < 0) {
1047 goto free_and_end;
1048 }
1049 }
1050
1051 if (av_codec_is_decoder(avctx->codec)) {
1052 /* validate channel layout from the decoder */
1053 if (avctx->channel_layout) {
1054 int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1055 if (!avctx->channels)
1056 avctx->channels = channels;
1057 else if (channels != avctx->channels) {
1058 av_log(avctx, AV_LOG_WARNING,
1059 "channel layout does not match number of channels\n");
1060 avctx->channel_layout = 0;
1061 }
1062 }
1063 if (avctx->channels && avctx->channels < 0 ||
1064 avctx->channels > FF_SANE_NB_CHANNELS) {
1065 ret = AVERROR(EINVAL);
1066 goto free_and_end;
1067 }
1068 }
1069 end:
1070 entangled_thread_counter--;
1071
1072 /* Release any user-supplied mutex. */
1073 if (lockmgr_cb) {
1074 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1075 }
1076 if (options) {
1077 av_dict_free(options);
1078 *options = tmp;
1079 }
1080
1081 return ret;
1082 free_and_end:
1083 av_dict_free(&tmp);
1084 av_freep(&avctx->priv_data);
1085 if (avctx->internal)
1086 av_freep(&avctx->internal->pool);
1087 av_freep(&avctx->internal);
1088 avctx->codec = NULL;
1089 goto end;
1090 }
1091
1092 int ff_alloc_packet(AVPacket *avpkt, int size)
1093 {
1094 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
1095 return AVERROR(EINVAL);
1096
1097 if (avpkt->data) {
1098 AVBufferRef *buf = avpkt->buf;
1099 #if FF_API_DESTRUCT_PACKET
1100 FF_DISABLE_DEPRECATION_WARNINGS
1101 void *destruct = avpkt->destruct;
1102 FF_ENABLE_DEPRECATION_WARNINGS
1103 #endif
1104
1105 if (avpkt->size < size)
1106 return AVERROR(EINVAL);
1107
1108 av_init_packet(avpkt);
1109 #if FF_API_DESTRUCT_PACKET
1110 FF_DISABLE_DEPRECATION_WARNINGS
1111 avpkt->destruct = destruct;
1112 FF_ENABLE_DEPRECATION_WARNINGS
1113 #endif
1114 avpkt->buf = buf;
1115 avpkt->size = size;
1116 return 0;
1117 } else {
1118 return av_new_packet(avpkt, size);
1119 }
1120 }
1121
1122 /**
1123 * Pad last frame with silence.
1124 */
1125 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1126 {
1127 AVFrame *frame = NULL;
1128 int ret;
1129
1130 if (!(frame = av_frame_alloc()))
1131 return AVERROR(ENOMEM);
1132
1133 frame->format = src->format;
1134 frame->channel_layout = src->channel_layout;
1135 frame->nb_samples = s->frame_size;
1136 ret = av_frame_get_buffer(frame, 32);
1137 if (ret < 0)
1138 goto fail;
1139
1140 ret = av_frame_copy_props(frame, src);
1141 if (ret < 0)
1142 goto fail;
1143
1144 if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1145 src->nb_samples, s->channels, s->sample_fmt)) < 0)
1146 goto fail;
1147 if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1148 frame->nb_samples - src->nb_samples,
1149 s->channels, s->sample_fmt)) < 0)
1150 goto fail;
1151
1152 *dst = frame;
1153
1154 return 0;
1155
1156 fail:
1157 av_frame_free(&frame);
1158 return ret;
1159 }
1160
1161 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1162 AVPacket *avpkt,
1163 const AVFrame *frame,
1164 int *got_packet_ptr)
1165 {
1166 AVFrame tmp;
1167 AVFrame *padded_frame = NULL;
1168 int ret;
1169 int user_packet = !!avpkt->data;
1170
1171 *got_packet_ptr = 0;
1172
1173 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1174 av_free_packet(avpkt);
1175 av_init_packet(avpkt);
1176 return 0;
1177 }
1178
1179 /* ensure that extended_data is properly set */
1180 if (frame && !frame->extended_data) {
1181 if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1182 avctx->channels > AV_NUM_DATA_POINTERS) {
1183 av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1184 "with more than %d channels, but extended_data is not set.\n",
1185 AV_NUM_DATA_POINTERS);
1186 return AVERROR(EINVAL);
1187 }
1188 av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1189
1190 tmp = *frame;
1191 tmp.extended_data = tmp.data;
1192 frame = &tmp;
1193 }
1194
1195 /* check for valid frame size */
1196 if (frame) {
1197 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
1198 if (frame->nb_samples > avctx->frame_size)
1199 return AVERROR(EINVAL);
1200 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1201 if (frame->nb_samples < avctx->frame_size &&
1202 !avctx->internal->last_audio_frame) {
1203 ret = pad_last_frame(avctx, &padded_frame, frame);
1204 if (ret < 0)
1205 return ret;
1206
1207 frame = padded_frame;
1208 avctx->internal->last_audio_frame = 1;
1209 }
1210
1211 if (frame->nb_samples != avctx->frame_size) {
1212 ret = AVERROR(EINVAL);
1213 goto end;
1214 }
1215 }
1216 }
1217
1218 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1219 if (!ret) {
1220 if (*got_packet_ptr) {
1221 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1222 if (avpkt->pts == AV_NOPTS_VALUE)
1223 avpkt->pts = frame->pts;
1224 if (!avpkt->duration)
1225 avpkt->duration = ff_samples_to_time_base(avctx,
1226 frame->nb_samples);
1227 }
1228 avpkt->dts = avpkt->pts;
1229 } else {
1230 avpkt->size = 0;
1231 }
1232
1233 if (!user_packet && avpkt->size) {
1234 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1235 if (ret >= 0)
1236 avpkt->data = avpkt->buf->data;
1237 }
1238
1239 avctx->frame_number++;
1240 }
1241
1242 if (ret < 0 || !*got_packet_ptr) {
1243 av_free_packet(avpkt);
1244 av_init_packet(avpkt);
1245 goto end;
1246 }
1247
1248 /* NOTE: if we add any audio encoders which output non-keyframe packets,
1249 * this needs to be moved to the encoders, but for now we can do it
1250 * here to simplify things */
1251 avpkt->flags |= AV_PKT_FLAG_KEY;
1252
1253 end:
1254 av_frame_free(&padded_frame);
1255
1256 return ret;
1257 }
1258
1259 int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1260 AVPacket *avpkt,
1261 const AVFrame *frame,
1262 int *got_packet_ptr)
1263 {
1264 int ret;
1265 int user_packet = !!avpkt->data;
1266
1267 *got_packet_ptr = 0;
1268
1269 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1270 av_free_packet(avpkt);
1271 av_init_packet(avpkt);
1272 avpkt->size = 0;
1273 return 0;
1274 }
1275
1276 if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1277 return AVERROR(EINVAL);
1278
1279 av_assert0(avctx->codec->encode2);
1280
1281 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1282 if (!ret) {
1283 if (!*got_packet_ptr)
1284 avpkt->size = 0;
1285 else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1286 avpkt->pts = avpkt->dts = frame->pts;
1287
1288 if (!user_packet && avpkt->size) {
1289 ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
1290 if (ret >= 0)
1291 avpkt->data = avpkt->buf->data;
1292 }
1293
1294 avctx->frame_number++;
1295 }
1296
1297 if (ret < 0 || !*got_packet_ptr)
1298 av_free_packet(avpkt);
1299
1300 emms_c();
1301 return ret;
1302 }
1303
1304 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1305 const AVSubtitle *sub)
1306 {
1307 int ret;
1308 if (sub->start_display_time) {
1309 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1310 return -1;
1311 }
1312 if (sub->num_rects == 0 || !sub->rects)
1313 return -1;
1314 ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1315 avctx->frame_number++;
1316 return ret;
1317 }
1318
1319 static int apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1320 {
1321 int size = 0, ret;
1322 const uint8_t *data;
1323 uint32_t flags;
1324
1325 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1326 if (!data)
1327 return 0;
1328
1329 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE)) {
1330 av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
1331 "changes, but PARAM_CHANGE side data was sent to it.\n");
1332 return AVERROR(EINVAL);
1333 }
1334
1335 if (size < 4)
1336 goto fail;
1337
1338 flags = bytestream_get_le32(&data);
1339 size -= 4;
1340
1341 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1342 if (size < 4)
1343 goto fail;
1344 avctx->channels = bytestream_get_le32(&data);
1345 size -= 4;
1346 }
1347 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1348 if (size < 8)
1349 goto fail;
1350 avctx->channel_layout = bytestream_get_le64(&data);
1351 size -= 8;
1352 }
1353 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1354 if (size < 4)
1355 goto fail;
1356 avctx->sample_rate = bytestream_get_le32(&data);
1357 size -= 4;
1358 }
1359 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1360 if (size < 8)
1361 goto fail;
1362 avctx->width = bytestream_get_le32(&data);
1363 avctx->height = bytestream_get_le32(&data);
1364 size -= 8;
1365 ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
1366 if (ret < 0)
1367 return ret;
1368 }
1369
1370 return 0;
1371 fail:
1372 av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
1373 return AVERROR_INVALIDDATA;
1374 }
1375
1376 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1377 int *got_picture_ptr,
1378 AVPacket *avpkt)
1379 {
1380 AVCodecInternal *avci = avctx->internal;
1381 int ret;
1382
1383 *got_picture_ptr = 0;
1384 if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1385 return -1;
1386
1387 avctx->internal->pkt = avpkt;
1388 ret = apply_param_change(avctx, avpkt);
1389 if (ret < 0) {
1390 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1391 if (avctx->err_recognition & AV_EF_EXPLODE)
1392 return ret;
1393 }
1394
1395 avcodec_get_frame_defaults(picture);
1396
1397 if (!avctx->refcounted_frames)
1398 av_frame_unref(&avci->to_free);
1399
1400 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1401 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1402 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1403 avpkt);
1404 else {
1405 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1406 avpkt);
1407 picture->pkt_dts = avpkt->dts;
1408 /* get_buffer is supposed to set frame parameters */
1409 if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1410 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1411 picture->width = avctx->width;
1412 picture->height = avctx->height;
1413 picture->format = avctx->pix_fmt;
1414 }
1415 }
1416
1417 emms_c(); //needed to avoid an emms_c() call before every return;
1418
1419 if (ret < 0 && picture->data[0])
1420 av_frame_unref(picture);
1421
1422 if (*got_picture_ptr) {
1423 if (!avctx->refcounted_frames) {
1424 avci->to_free = *picture;
1425 avci->to_free.extended_data = avci->to_free.data;
1426 memset(picture->buf, 0, sizeof(picture->buf));
1427 }
1428
1429 avctx->frame_number++;
1430 }
1431 } else
1432 ret = 0;
1433
1434 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1435 * make sure it's set correctly */
1436 picture->extended_data = picture->data;
1437
1438 return ret;
1439 }
1440
1441 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1442 AVFrame *frame,
1443 int *got_frame_ptr,
1444 AVPacket *avpkt)
1445 {
1446 AVCodecInternal *avci = avctx->internal;
1447 int planar, channels;
1448 int ret = 0;
1449
1450 *got_frame_ptr = 0;
1451
1452 avctx->internal->pkt = avpkt;
1453
1454 if (!avpkt->data && avpkt->size) {
1455 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1456 return AVERROR(EINVAL);
1457 }
1458
1459 ret = apply_param_change(avctx, avpkt);
1460 if (ret < 0) {
1461 av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
1462 if (avctx->err_recognition & AV_EF_EXPLODE)
1463 return ret;
1464 }
1465
1466 avcodec_get_frame_defaults(frame);
1467
1468 if (!avctx->refcounted_frames)
1469 av_frame_unref(&avci->to_free);
1470
1471 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1472 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1473 if (ret >= 0 && *got_frame_ptr) {
1474 avctx->frame_number++;
1475 frame->pkt_dts = avpkt->dts;
1476 if (frame->format == AV_SAMPLE_FMT_NONE)
1477 frame->format = avctx->sample_fmt;
1478
1479 if (!avctx->refcounted_frames) {
1480 avci->to_free = *frame;
1481 avci->to_free.extended_data = avci->to_free.data;
1482 memset(frame->buf, 0, sizeof(frame->buf));
1483 frame->extended_buf = NULL;
1484 frame->nb_extended_buf = 0;
1485 }
1486 } else if (frame->data[0])
1487 av_frame_unref(frame);
1488 }
1489
1490 /* many decoders assign whole AVFrames, thus overwriting extended_data;
1491 * make sure it's set correctly; assume decoders that actually use
1492 * extended_data are doing it correctly */
1493 planar = av_sample_fmt_is_planar(frame->format);
1494 channels = av_get_channel_layout_nb_channels(frame->channel_layout);
1495 if (!(planar && channels > AV_NUM_DATA_POINTERS))
1496 frame->extended_data = frame->data;
1497
1498 return ret;
1499 }
1500
1501 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1502 int *got_sub_ptr,
1503 AVPacket *avpkt)
1504 {
1505 int ret;
1506
1507 avctx->internal->pkt = avpkt;
1508 *got_sub_ptr = 0;
1509 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1510 if (*got_sub_ptr)
1511 avctx->frame_number++;
1512 return ret;
1513 }
1514
1515 void avsubtitle_free(AVSubtitle *sub)
1516 {
1517 int i;
1518
1519 for (i = 0; i < sub->num_rects; i++) {
1520 av_freep(&sub->rects[i]->pict.data[0]);
1521 av_freep(&sub->rects[i]->pict.data[1]);
1522 av_freep(&sub->rects[i]->pict.data[2]);
1523 av_freep(&sub->rects[i]->pict.data[3]);
1524 av_freep(&sub->rects[i]->text);
1525 av_freep(&sub->rects[i]->ass);
1526 av_freep(&sub->rects[i]);
1527 }
1528
1529 av_freep(&sub->rects);
1530
1531 memset(sub, 0, sizeof(AVSubtitle));
1532 }
1533
1534 av_cold int avcodec_close(AVCodecContext *avctx)
1535 {
1536 /* If there is a user-supplied mutex locking routine, call it. */
1537 if (lockmgr_cb) {
1538 if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1539 return -1;
1540 }
1541
1542 entangled_thread_counter++;
1543 if (entangled_thread_counter != 1) {
1544 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1545 entangled_thread_counter--;
1546 return -1;
1547 }
1548
1549 if (avcodec_is_open(avctx)) {
1550 FramePool *pool = avctx->internal->pool;
1551 int i;
1552 if (HAVE_THREADS && avctx->internal->thread_ctx)
1553 ff_thread_free(avctx);
1554 if (avctx->codec && avctx->codec->close)
1555 avctx->codec->close(avctx);
1556 avctx->coded_frame = NULL;
1557 if (!avctx->refcounted_frames)
1558 av_frame_unref(&avctx->internal->to_free);
1559 for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1560 av_buffer_pool_uninit(&pool->pools[i]);
1561 av_freep(&avctx->internal->pool);
1562 av_freep(&avctx->internal);
1563 }
1564
1565 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1566 av_opt_free(avctx->priv_data);
1567 av_opt_free(avctx);
1568 av_freep(&avctx->priv_data);
1569 if (av_codec_is_encoder(avctx->codec))
1570 av_freep(&avctx->extradata);
1571 avctx->codec = NULL;
1572 avctx->active_thread_type = 0;
1573 entangled_thread_counter--;
1574
1575 /* Release any user-supplied mutex. */
1576 if (lockmgr_cb) {
1577 (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1578 }
1579 return 0;
1580 }
1581
1582 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1583 {
1584 AVCodec *p, *experimental = NULL;
1585 p = first_avcodec;
1586 while (p) {
1587 if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1588 p->id == id) {
1589 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1590 experimental = p;
1591 } else
1592 return p;
1593 }
1594 p = p->next;
1595 }
1596 return experimental;
1597 }
1598
1599 AVCodec *avcodec_find_encoder(enum AVCodecID id)
1600 {
1601 return find_encdec(id, 1);
1602 }
1603
1604 AVCodec *avcodec_find_encoder_by_name(const char *name)
1605 {
1606 AVCodec *p;
1607 if (!name)
1608 return NULL;
1609 p = first_avcodec;
1610 while (p) {
1611 if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1612 return p;
1613 p = p->next;
1614 }
1615 return NULL;
1616 }
1617
1618 AVCodec *avcodec_find_decoder(enum AVCodecID id)
1619 {
1620 return find_encdec(id, 0);
1621 }
1622
1623 AVCodec *avcodec_find_decoder_by_name(const char *name)
1624 {
1625 AVCodec *p;
1626 if (!name)
1627 return NULL;
1628 p = first_avcodec;
1629 while (p) {
1630 if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1631 return p;
1632 p = p->next;
1633 }
1634 return NULL;
1635 }
1636
1637 static int get_bit_rate(AVCodecContext *ctx)
1638 {
1639 int bit_rate;
1640 int bits_per_sample;
1641
1642 switch (ctx->codec_type) {
1643 case AVMEDIA_TYPE_VIDEO:
1644 case AVMEDIA_TYPE_DATA:
1645 case AVMEDIA_TYPE_SUBTITLE:
1646 case AVMEDIA_TYPE_ATTACHMENT:
1647 bit_rate = ctx->bit_rate;
1648 break;
1649 case AVMEDIA_TYPE_AUDIO:
1650 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1651 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1652 break;
1653 default:
1654 bit_rate = 0;
1655 break;
1656 }
1657 return bit_rate;
1658 }
1659
1660 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1661 {
1662 int i, len, ret = 0;
1663
1664 #define TAG_PRINT(x) \
1665 (((x) >= '0' && (x) <= '9') || \
1666 ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
1667 ((x) == '.' || (x) == ' '))
1668
1669 for (i = 0; i < 4; i++) {
1670 len = snprintf(buf, buf_size,
1671 TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
1672 buf += len;
1673 buf_size = buf_size > len ? buf_size - len : 0;
1674 ret += len;
1675 codec_tag >>= 8;
1676 }
1677 return ret;
1678 }
1679
1680 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1681 {
1682 const char *codec_name;
1683 const char *profile = NULL;
1684 const AVCodec *p;
1685 char buf1[32];
1686 int bitrate;
1687 AVRational display_aspect_ratio;
1688
1689 if (enc->codec)
1690 p = enc->codec;
1691 else if (encode)
1692 p = avcodec_find_encoder(enc->codec_id);
1693 else
1694 p = avcodec_find_decoder(enc->codec_id);
1695
1696 if (p) {
1697 codec_name = p->name;
1698 profile = av_get_profile_name(p, enc->profile);
1699 } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {
1700 /* fake mpeg2 transport stream codec (currently not
1701 * registered) */
1702 codec_name = "mpeg2ts";
1703 } else if (enc->codec_name[0] != '\0') {
1704 codec_name = enc->codec_name;
1705 } else {
1706 /* output avi tags */
1707 char tag_buf[32];
1708 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1709 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1710 codec_name = buf1;
1711 }
1712
1713 switch (enc->codec_type) {
1714 case AVMEDIA_TYPE_VIDEO:
1715 snprintf(buf, buf_size,
1716 "Video: %s%s",
1717 codec_name, enc->mb_decision ? " (hq)" : "");
1718 if (profile)
1719 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1720 " (%s)", profile);
1721 if (enc->pix_fmt != AV_PIX_FMT_NONE) {
1722 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1723 ", %s",
1724 av_get_pix_fmt_name(enc->pix_fmt));
1725 }
1726 if (enc->width) {
1727 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1728 ", %dx%d",
1729 enc->width, enc->height);
1730 if (enc->sample_aspect_ratio.num) {
1731 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1732 enc->width * enc->sample_aspect_ratio.num,
1733 enc->height * enc->sample_aspect_ratio.den,
1734 1024 * 1024);
1735 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1736 " [PAR %d:%d DAR %d:%d]",
1737 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1738 display_aspect_ratio.num, display_aspect_ratio.den);
1739 }
1740 if (av_log_get_level() >= AV_LOG_DEBUG) {
1741 int g = av_gcd(enc->time_base.num, enc->time_base.den);
1742 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1743 ", %d/%d",
1744 enc->time_base.num / g, enc->time_base.den / g);
1745 }
1746 }
1747 if (encode) {
1748 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1749 ", q=%d-%d", enc->qmin, enc->qmax);
1750 }
1751 break;
1752 case AVMEDIA_TYPE_AUDIO:
1753 snprintf(buf, buf_size,
1754 "Audio: %s",
1755 codec_name);
1756 if (profile)
1757 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1758 " (%s)", profile);
1759 if (enc->sample_rate) {
1760 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1761 ", %d Hz", enc->sample_rate);
1762 }
1763 av_strlcat(buf, ", ", buf_size);
1764 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1765 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1766 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1767 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1768 }
1769 break;
1770 case AVMEDIA_TYPE_DATA:
1771 snprintf(buf, buf_size, "Data: %s", codec_name);
1772 break;
1773 case AVMEDIA_TYPE_SUBTITLE:
1774 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1775 break;
1776 case AVMEDIA_TYPE_ATTACHMENT:
1777 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1778 break;
1779 default:
1780 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1781 return;
1782 }
1783 if (encode) {
1784 if (enc->flags & CODEC_FLAG_PASS1)
1785 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1786 ", pass 1");
1787 if (enc->flags & CODEC_FLAG_PASS2)
1788 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1789 ", pass 2");
1790 }
1791 bitrate = get_bit_rate(enc);
1792 if (bitrate != 0) {
1793 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1794 ", %d kb/s", bitrate / 1000);
1795 }
1796 }
1797
1798 const char *av_get_profile_name(const AVCodec *codec, int profile)
1799 {
1800 const AVProfile *p;
1801 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1802 return NULL;
1803
1804 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1805 if (p->profile == profile)
1806 return p->name;
1807
1808 return NULL;
1809 }
1810
1811 unsigned avcodec_version(void)
1812 {
1813 return LIBAVCODEC_VERSION_INT;
1814 }
1815
1816 const char *avcodec_configuration(void)
1817 {
1818 return LIBAV_CONFIGURATION;
1819 }
1820
1821 const char *avcodec_license(void)
1822 {
1823 #define LICENSE_PREFIX "libavcodec license: "
1824 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1825 }
1826
1827 void avcodec_flush_buffers(AVCodecContext *avctx)
1828 {
1829 if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1830 ff_thread_flush(avctx);
1831 else if (avctx->codec->flush)
1832 avctx->codec->flush(avctx);
1833
1834 if (!avctx->refcounted_frames)
1835 av_frame_unref(&avctx->internal->to_free);
1836 }
1837
1838 int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
1839 {
1840 switch (codec_id) {
1841 case AV_CODEC_ID_ADPCM_CT:
1842 case AV_CODEC_ID_ADPCM_IMA_APC:
1843 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1844 case AV_CODEC_ID_ADPCM_IMA_WS:
1845 case AV_CODEC_ID_ADPCM_G722:
1846 case AV_CODEC_ID_ADPCM_YAMAHA:
1847 return 4;
1848 case AV_CODEC_ID_PCM_ALAW:
1849 case AV_CODEC_ID_PCM_MULAW:
1850 case AV_CODEC_ID_PCM_S8:
1851 case AV_CODEC_ID_PCM_U8:
1852 case AV_CODEC_ID_PCM_ZORK:
1853 return 8;
1854 case AV_CODEC_ID_PCM_S16BE:
1855 case AV_CODEC_ID_PCM_S16LE:
1856 case AV_CODEC_ID_PCM_S16LE_PLANAR:
1857 case AV_CODEC_ID_PCM_U16BE:
1858 case AV_CODEC_ID_PCM_U16LE:
1859 return 16;
1860 case AV_CODEC_ID_PCM_S24DAUD:
1861 case AV_CODEC_ID_PCM_S24BE:
1862 case AV_CODEC_ID_PCM_S24LE:
1863 case AV_CODEC_ID_PCM_S24LE_PLANAR:
1864 case AV_CODEC_ID_PCM_U24BE:
1865 case AV_CODEC_ID_PCM_U24LE:
1866 return 24;
1867 case AV_CODEC_ID_PCM_S32BE:
1868 case AV_CODEC_ID_PCM_S32LE:
1869 case AV_CODEC_ID_PCM_S32LE_PLANAR:
1870 case AV_CODEC_ID_PCM_U32BE:
1871 case AV_CODEC_ID_PCM_U32LE:
1872 case AV_CODEC_ID_PCM_F32BE:
1873 case AV_CODEC_ID_PCM_F32LE:
1874 return 32;
1875 case AV_CODEC_ID_PCM_F64BE:
1876 case AV_CODEC_ID_PCM_F64LE:
1877 return 64;
1878 default:
1879 return 0;
1880 }
1881 }
1882
1883 int av_get_bits_per_sample(enum AVCodecID codec_id)
1884 {
1885 switch (codec_id) {
1886 case AV_CODEC_ID_ADPCM_SBPRO_2:
1887 return 2;
1888 case AV_CODEC_ID_ADPCM_SBPRO_3:
1889 return 3;
1890 case AV_CODEC_ID_ADPCM_SBPRO_4:
1891 case AV_CODEC_ID_ADPCM_IMA_WAV:
1892 case AV_CODEC_ID_ADPCM_IMA_QT:
1893 case AV_CODEC_ID_ADPCM_SWF:
1894 case AV_CODEC_ID_ADPCM_MS:
1895 return 4;
1896 default:
1897 return av_get_exact_bits_per_sample(codec_id);
1898 }
1899 }
1900
1901 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
1902 {
1903 int id, sr, ch, ba, tag, bps;
1904
1905 id = avctx->codec_id;
1906 sr = avctx->sample_rate;
1907 ch = avctx->channels;
1908 ba = avctx->block_align;
1909 tag = avctx->codec_tag;
1910 bps = av_get_exact_bits_per_sample(avctx->codec_id);
1911
1912 /* codecs with an exact constant bits per sample */
1913 if (bps > 0 && ch > 0 && frame_bytes > 0)
1914 return (frame_bytes * 8) / (bps * ch);
1915 bps = avctx->bits_per_coded_sample;
1916
1917 /* codecs with a fixed packet duration */
1918 switch (id) {
1919 case AV_CODEC_ID_ADPCM_ADX: return 32;
1920 case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
1921 case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
1922 case AV_CODEC_ID_AMR_NB:
1923 case AV_CODEC_ID_GSM:
1924 case AV_CODEC_ID_QCELP:
1925 case AV_CODEC_ID_RA_144:
1926 case AV_CODEC_ID_RA_288: return 160;
1927 case AV_CODEC_ID_IMC: return 256;
1928 case AV_CODEC_ID_AMR_WB:
1929 case AV_CODEC_ID_GSM_MS: return 320;
1930 case AV_CODEC_ID_MP1: return 384;
1931 case AV_CODEC_ID_ATRAC1: return 512;
1932 case AV_CODEC_ID_ATRAC3: return 1024;
1933 case AV_CODEC_ID_MP2:
1934 case AV_CODEC_ID_MUSEPACK7: return 1152;
1935 case AV_CODEC_ID_AC3: return 1536;
1936 }
1937
1938 if (sr > 0) {
1939 /* calc from sample rate */
1940 if (id == AV_CODEC_ID_TTA)
1941 return 256 * sr / 245;
1942
1943 if (ch > 0) {
1944 /* calc from sample rate and channels */
1945 if (id == AV_CODEC_ID_BINKAUDIO_DCT)
1946 return (480 << (sr / 22050)) / ch;
1947 }
1948 }
1949
1950 if (ba > 0) {
1951 /* calc from block_align */
1952 if (id == AV_CODEC_ID_SIPR) {
1953 switch (ba) {
1954 case 20: return 160;
1955 case 19: return 144;
1956 case 29: return 288;
1957 case 37: return 480;
1958 }
1959 } else if (id == AV_CODEC_ID_ILBC) {
1960 switch (ba) {
1961 case 38: return 160;
1962 case 50: return 240;
1963 }
1964 }
1965 }
1966
1967 if (frame_bytes > 0) {
1968 /* calc from frame_bytes only */
1969 if (id == AV_CODEC_ID_TRUESPEECH)
1970 return 240 * (frame_bytes / 32);
1971 if (id == AV_CODEC_ID_NELLYMOSER)
1972 return 256 * (frame_bytes / 64);
1973
1974 if (bps > 0) {
1975 /* calc from frame_bytes and bits_per_coded_sample */
1976 if (id == AV_CODEC_ID_ADPCM_G726)
1977 return frame_bytes * 8 / bps;
1978 }
1979
1980 if (ch > 0) {
1981 /* calc from frame_bytes and channels */
1982 switch (id) {
1983 case AV_CODEC_ID_ADPCM_4XM:
1984 case AV_CODEC_ID_ADPCM_IMA_ISS:
1985 return (frame_bytes - 4 * ch) * 2 / ch;
1986 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1987 return (frame_bytes - 4) * 2 / ch;
1988 case AV_CODEC_ID_ADPCM_IMA_AMV:
1989 return (frame_bytes - 8) * 2 / ch;
1990 case AV_CODEC_ID_ADPCM_XA:
1991 return (frame_bytes / 128) * 224 / ch;
1992 case AV_CODEC_ID_INTERPLAY_DPCM:
1993 return (frame_bytes - 6 - ch) / ch;
1994 case AV_CODEC_ID_ROQ_DPCM:
1995 return (frame_bytes - 8) / ch;
1996 case AV_CODEC_ID_XAN_DPCM:
1997 return (frame_bytes - 2 * ch) / ch;
1998 case AV_CODEC_ID_MACE3:
1999 return 3 * frame_bytes / ch;
2000 case AV_CODEC_ID_MACE6:
2001 return 6 * frame_bytes / ch;
2002 case AV_CODEC_ID_PCM_LXF:
2003 return 2 * (frame_bytes / (5 * ch));
2004 }
2005
2006 if (tag) {
2007 /* calc from frame_bytes, channels, and codec_tag */
2008 if (id == AV_CODEC_ID_SOL_DPCM) {
2009 if (tag == 3)
2010 return frame_bytes / ch;
2011 else
2012 return frame_bytes * 2 / ch;
2013 }
2014 }
2015
2016 if (ba > 0) {
2017 /* calc from frame_bytes, channels, and block_align */
2018 int blocks = frame_bytes / ba;
2019 switch (avctx->codec_id) {
2020 case AV_CODEC_ID_ADPCM_IMA_WAV:
2021 return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2022 case AV_CODEC_ID_ADPCM_IMA_DK3:
2023 return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2024 case AV_CODEC_ID_ADPCM_IMA_DK4:
2025 return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2026 case AV_CODEC_ID_ADPCM_MS:
2027 return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2028 }
2029 }
2030
2031 if (bps > 0) {
2032 /* calc from frame_bytes, channels, and bits_per_coded_sample */
2033 switch (avctx->codec_id) {
2034 case AV_CODEC_ID_PCM_DVD:
2035 return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2036 case AV_CODEC_ID_PCM_BLURAY:
2037 return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2038 case AV_CODEC_ID_S302M:
2039 return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2040 }
2041 }
2042 }
2043 }
2044
2045 return 0;
2046 }
2047
2048 #if !HAVE_THREADS
2049 int ff_thread_init(AVCodecContext *s)
2050 {
2051 return -1;
2052 }
2053
2054 #endif
2055
2056 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2057 {
2058 unsigned int n = 0;
2059
2060 while (v >= 0xff) {
2061 *s++ = 0xff;
2062 v -= 0xff;
2063 n++;
2064 }
2065 *s = v;
2066 n++;
2067 return n;
2068 }
2069
2070 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2071 {
2072 int i;
2073 for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2074 return i;
2075 }
2076
2077 #if FF_API_MISSING_SAMPLE
2078 FF_DISABLE_DEPRECATION_WARNINGS
2079 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2080 {
2081 av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your Libav "
2082 "version to the newest one from Git. If the problem still "
2083 "occurs, it means that your file has a feature which has not "
2084 "been implemented.\n", feature);
2085 if(want_sample)
2086 av_log_ask_for_sample(avc, NULL);
2087 }
2088
2089 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2090 {
2091 va_list argument_list;
2092
2093 va_start(argument_list, msg);
2094
2095 if (msg)
2096 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2097 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2098 "of this file to ftp://upload.libav.org/incoming/ "
2099 "and contact the libav-devel mailing list.\n");
2100
2101 va_end(argument_list);
2102 }
2103 FF_ENABLE_DEPRECATION_WARNINGS
2104 #endif /* FF_API_MISSING_SAMPLE */
2105
2106 static AVHWAccel *first_hwaccel = NULL;
2107
2108 void av_register_hwaccel(AVHWAccel *hwaccel)
2109 {
2110 AVHWAccel **p = &first_hwaccel;
2111 while (*p)
2112 p = &(*p)->next;
2113 *p = hwaccel;
2114 hwaccel->next = NULL;
2115 }
2116
2117 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
2118 {
2119 return hwaccel ? hwaccel->next : first_hwaccel;
2120 }
2121
2122 AVHWAccel *ff_find_hwaccel(AVCodecContext *avctx)
2123 {
2124 enum AVCodecID codec_id = avctx->codec->id;
2125 enum AVPixelFormat pix_fmt = avctx->pix_fmt;
2126
2127 AVHWAccel *hwaccel = NULL;
2128
2129 while ((hwaccel = av_hwaccel_next(hwaccel)))
2130 if (hwaccel->id == codec_id
2131 && hwaccel->pix_fmt == pix_fmt)
2132 return hwaccel;
2133 return NULL;
2134 }
2135
2136 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2137 {
2138 if (lockmgr_cb) {
2139 if (lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
2140 return -1;
2141 if (lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
2142 return -1;
2143 }
2144
2145 lockmgr_cb = cb;
2146
2147 if (lockmgr_cb) {
2148 if (lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
2149 return -1;
2150 if (lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
2151 return -1;
2152 }
2153 return 0;
2154 }
2155
2156 int avpriv_lock_avformat(void)
2157 {
2158 if (lockmgr_cb) {
2159 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
2160 return -1;
2161 }
2162 return 0;
2163 }
2164
2165 int avpriv_unlock_avformat(void)
2166 {
2167 if (lockmgr_cb) {
2168 if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
2169 return -1;
2170 }
2171 return 0;
2172 }
2173
2174 unsigned int avpriv_toupper4(unsigned int x)
2175 {
2176 return av_toupper(x & 0xFF) +
2177 (av_toupper((x >> 8) & 0xFF) << 8) +
2178 (av_toupper((x >> 16) & 0xFF) << 16) +
2179 (av_toupper((x >> 24) & 0xFF) << 24);
2180 }
2181
2182 int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
2183 {
2184 int ret;
2185
2186 dst->owner = src->owner;
2187
2188 ret = av_frame_ref(dst->f, src->f);
2189 if (ret < 0)
2190 return ret;
2191
2192 if (src->progress &&
2193 !(dst->progress = av_buffer_ref(src->progress))) {
2194 ff_thread_release_buffer(dst->owner, dst);
2195 return AVERROR(ENOMEM);
2196 }
2197
2198 return 0;
2199 }
2200
2201 #if !HAVE_THREADS
2202
2203 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
2204 {
2205 f->owner = avctx;
2206 return ff_get_buffer(avctx, f->f, flags);
2207 }
2208
2209 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
2210 {
2211 av_frame_unref(f->f);
2212 }
2213
2214 void ff_thread_finish_setup(AVCodecContext *avctx)
2215 {
2216 }
2217
2218 void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
2219 {
2220 }
2221
2222 void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
2223 {
2224 }
2225
2226 #endif
2227
2228 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
2229 {
2230 if (codec_id <= AV_CODEC_ID_NONE)
2231 return AVMEDIA_TYPE_UNKNOWN;
2232 else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2233 return AVMEDIA_TYPE_VIDEO;
2234 else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2235 return AVMEDIA_TYPE_AUDIO;
2236 else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2237 return AVMEDIA_TYPE_SUBTITLE;
2238
2239 return AVMEDIA_TYPE_UNKNOWN;
2240 }
2241
2242 int avcodec_is_open(AVCodecContext *s)
2243 {
2244 return !!s->internal;
2245 }
2246
2247 const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
2248 const uint8_t *end,
2249 uint32_t * restrict state)
2250 {
2251 int i;
2252
2253 assert(p <= end);
2254 if (p >= end)
2255 return end;
2256
2257 for (i = 0; i < 3; i++) {
2258 uint32_t tmp = *state << 8;
2259 *state = tmp + *(p++);
2260 if (tmp == 0x100 || p == end)
2261 return p;
2262 }
2263
2264 while (p < end) {
2265 if (p[-1] > 1 ) p += 3;
2266 else if (p[-2] ) p += 2;
2267 else if (p[-3]|(p[-1]-1)) p++;
2268 else {
2269 p++;
2270 break;
2271 }
2272 }
2273
2274 p = FFMIN(p, end) - 4;
2275 *state = AV_RB32(p);
2276
2277 return p + 4;
2278 }
Libav master