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