path: root/libavcodec/utils.c (plain)
blob: 0c6883686e71182bd86b1b978d5ed7cbc65c8ff8

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 FFmpeg.
7	*
8	* FFmpeg 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	* FFmpeg 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 FFmpeg; 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/atomic.h"
30	#include "libavutil/attributes.h"
31	#include "libavutil/avassert.h"
32	#include "libavutil/avstring.h"
33	#include "libavutil/bprint.h"
34	#include "libavutil/channel_layout.h"
35	#include "libavutil/crc.h"
36	#include "libavutil/frame.h"
37	#include "libavutil/hwcontext.h"
38	#include "libavutil/internal.h"
39	#include "libavutil/mathematics.h"
40	#include "libavutil/mem_internal.h"
41	#include "libavutil/pixdesc.h"
42	#include "libavutil/imgutils.h"
43	#include "libavutil/samplefmt.h"
44	#include "libavutil/dict.h"
45	#include "libavutil/thread.h"
46	#include "avcodec.h"
47	#include "libavutil/opt.h"
48	#include "me_cmp.h"
49	#include "mpegvideo.h"
50	#include "thread.h"
51	#include "frame_thread_encoder.h"
52	#include "internal.h"
53	#include "raw.h"
54	#include "bytestream.h"
55	#include "version.h"
56	#include <stdlib.h>
57	#include <stdarg.h>
58	#include <limits.h>
59	#include <float.h>
60	#if CONFIG_ICONV
61	# include <iconv.h>
62	#endif
63
64	#include "libavutil/ffversion.h"
65	const char av_codec_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
66
67	#if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS
68	static int default_lockmgr_cb(void **arg, enum AVLockOp op)
69	{
70	void * volatile * mutex = arg;
71	int err;
72
73	switch (op) {
74	case AV_LOCK_CREATE:
75	return 0;
76	case AV_LOCK_OBTAIN:
77	if (!*mutex) {
78	pthread_mutex_t *tmp = av_malloc(sizeof(pthread_mutex_t));
79	if (!tmp)
80	return AVERROR(ENOMEM);
81	if ((err = pthread_mutex_init(tmp, NULL))) {
82	av_free(tmp);
83	return AVERROR(err);
84	}
85	if (avpriv_atomic_ptr_cas(mutex, NULL, tmp)) {
86	pthread_mutex_destroy(tmp);
87	av_free(tmp);
88	}
89	}
90
91	if ((err = pthread_mutex_lock(*mutex)))
92	return AVERROR(err);
93
94	return 0;
95	case AV_LOCK_RELEASE:
96	if ((err = pthread_mutex_unlock(*mutex)))
97	return AVERROR(err);
98
99	return 0;
100	case AV_LOCK_DESTROY:
101	if (*mutex)
102	pthread_mutex_destroy(*mutex);
103	av_free(*mutex);
104	avpriv_atomic_ptr_cas(mutex, *mutex, NULL);
105	return 0;
106	}
107	return 1;
108	}
109	static int (*lockmgr_cb)(void **mutex, enum AVLockOp op) = default_lockmgr_cb;
110	#else
111	static int (*lockmgr_cb)(void **mutex, enum AVLockOp op) = NULL;
112	#endif
113
114
115	volatile int ff_avcodec_locked;
116	static int volatile entangled_thread_counter = 0;
117	static void *codec_mutex;
118	static void *avformat_mutex;
119
120	void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
121	{
122	uint8_t **p = ptr;
123	if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
124	av_freep(p);
125	*size = 0;
126	return;
127	}
128	if (!ff_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE, 1))
129	memset(*p + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
130	}
131
132	void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
133	{
134	uint8_t **p = ptr;
135	if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
136	av_freep(p);
137	*size = 0;
138	return;
139	}
140	if (!ff_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE, 1))
141	memset(*p, 0, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
142	}
143
144	/* encoder management */
145	static AVCodec *first_avcodec = NULL;
146	static AVCodec **last_avcodec = &first_avcodec;
147
148	AVCodec *av_codec_next(const AVCodec *c)
149	{
150	if (c)
151	return c->next;
152	else
153	return first_avcodec;
154	}
155
156	static av_cold void avcodec_init(void)
157	{
158	static int initialized = 0;
159
160	if (initialized != 0)
161	return;
162	initialized = 1;
163
164	if (CONFIG_ME_CMP)
165	ff_me_cmp_init_static();
166	}
167
168	int av_codec_is_encoder(const AVCodec *codec)
169	{
170	return codec && (codec->encode_sub || codec->encode2 ||codec->send_frame);
171	}
172
173	int av_codec_is_decoder(const AVCodec *codec)
174	{
175	return codec && (codec->decode || codec->send_packet);
176	}
177
178	av_cold void avcodec_register(AVCodec *codec)
179	{
180	AVCodec **p;
181	avcodec_init();
182	p = last_avcodec;
183	codec->next = NULL;
184
185	while(*p || avpriv_atomic_ptr_cas((void * volatile *)p, NULL, codec))
186	p = &(*p)->next;
187	last_avcodec = &codec->next;
188
189	if (codec->init_static_data)
190	codec->init_static_data(codec);
191	}
192
193	#if FF_API_EMU_EDGE
194	unsigned avcodec_get_edge_width(void)
195	{
196	return EDGE_WIDTH;
197	}
198	#endif
199
200	#if FF_API_SET_DIMENSIONS
201	void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
202	{
203	int ret = ff_set_dimensions(s, width, height);
204	if (ret < 0) {
205	av_log(s, AV_LOG_WARNING, "Failed to set dimensions %d %d\n", width, height);
206	}
207	}
208	#endif
209
210	int ff_set_dimensions(AVCodecContext *s, int width, int height)
211	{
212	int ret = av_image_check_size2(width, height, s->max_pixels, AV_PIX_FMT_NONE, 0, s);
213
214	if (ret < 0)
215	width = height = 0;
216
217	s->coded_width = width;
218	s->coded_height = height;
219	s->width = AV_CEIL_RSHIFT(width, s->lowres);
220	s->height = AV_CEIL_RSHIFT(height, s->lowres);
221
222	return ret;
223	}
224
225	int ff_set_sar(AVCodecContext *avctx, AVRational sar)
226	{
227	int ret = av_image_check_sar(avctx->width, avctx->height, sar);
228
229	if (ret < 0) {
230	av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",
231	sar.num, sar.den);
232	avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
233	return ret;
234	} else {
235	avctx->sample_aspect_ratio = sar;
236	}
237	return 0;
238	}
239
240	int ff_side_data_update_matrix_encoding(AVFrame *frame,
241	enum AVMatrixEncoding matrix_encoding)
242	{
243	AVFrameSideData *side_data;
244	enum AVMatrixEncoding *data;
245
246	side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);
247	if (!side_data)
248	side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,
249	sizeof(enum AVMatrixEncoding));
250
251	if (!side_data)
252	return AVERROR(ENOMEM);
253
254	data = (enum AVMatrixEncoding*)side_data->data;
255	*data = matrix_encoding;
256
257	return 0;
258	}
259
260	void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
261	int linesize_align[AV_NUM_DATA_POINTERS])
262	{
263	int i;
264	int w_align = 1;
265	int h_align = 1;
266	AVPixFmtDescriptor const *desc = av_pix_fmt_desc_get(s->pix_fmt);
267
268	if (desc) {
269	w_align = 1 << desc->log2_chroma_w;
270	h_align = 1 << desc->log2_chroma_h;
271	}
272
273	switch (s->pix_fmt) {
274	case AV_PIX_FMT_YUV420P:
275	case AV_PIX_FMT_YUYV422:
276	case AV_PIX_FMT_YVYU422:
277	case AV_PIX_FMT_UYVY422:
278	case AV_PIX_FMT_YUV422P:
279	case AV_PIX_FMT_YUV440P:
280	case AV_PIX_FMT_YUV444P:
281	case AV_PIX_FMT_GBRP:
282	case AV_PIX_FMT_GBRAP:
283	case AV_PIX_FMT_GRAY8:
284	case AV_PIX_FMT_GRAY16BE:
285	case AV_PIX_FMT_GRAY16LE:
286	case AV_PIX_FMT_YUVJ420P:
287	case AV_PIX_FMT_YUVJ422P:
288	case AV_PIX_FMT_YUVJ440P:
289	case AV_PIX_FMT_YUVJ444P:
290	case AV_PIX_FMT_YUVA420P:
291	case AV_PIX_FMT_YUVA422P:
292	case AV_PIX_FMT_YUVA444P:
293	case AV_PIX_FMT_YUV420P9LE:
294	case AV_PIX_FMT_YUV420P9BE:
295	case AV_PIX_FMT_YUV420P10LE:
296	case AV_PIX_FMT_YUV420P10BE:
297	case AV_PIX_FMT_YUV420P12LE:
298	case AV_PIX_FMT_YUV420P12BE:
299	case AV_PIX_FMT_YUV420P14LE:
300	case AV_PIX_FMT_YUV420P14BE:
301	case AV_PIX_FMT_YUV420P16LE:
302	case AV_PIX_FMT_YUV420P16BE:
303	case AV_PIX_FMT_YUVA420P9LE:
304	case AV_PIX_FMT_YUVA420P9BE:
305	case AV_PIX_FMT_YUVA420P10LE:
306	case AV_PIX_FMT_YUVA420P10BE:
307	case AV_PIX_FMT_YUVA420P16LE:
308	case AV_PIX_FMT_YUVA420P16BE:
309	case AV_PIX_FMT_YUV422P9LE:
310	case AV_PIX_FMT_YUV422P9BE:
311	case AV_PIX_FMT_YUV422P10LE:
312	case AV_PIX_FMT_YUV422P10BE:
313	case AV_PIX_FMT_YUV422P12LE:
314	case AV_PIX_FMT_YUV422P12BE:
315	case AV_PIX_FMT_YUV422P14LE:
316	case AV_PIX_FMT_YUV422P14BE:
317	case AV_PIX_FMT_YUV422P16LE:
318	case AV_PIX_FMT_YUV422P16BE:
319	case AV_PIX_FMT_YUVA422P9LE:
320	case AV_PIX_FMT_YUVA422P9BE:
321	case AV_PIX_FMT_YUVA422P10LE:
322	case AV_PIX_FMT_YUVA422P10BE:
323	case AV_PIX_FMT_YUVA422P16LE:
324	case AV_PIX_FMT_YUVA422P16BE:
325	case AV_PIX_FMT_YUV440P10LE:
326	case AV_PIX_FMT_YUV440P10BE:
327	case AV_PIX_FMT_YUV440P12LE:
328	case AV_PIX_FMT_YUV440P12BE:
329	case AV_PIX_FMT_YUV444P9LE:
330	case AV_PIX_FMT_YUV444P9BE:
331	case AV_PIX_FMT_YUV444P10LE:
332	case AV_PIX_FMT_YUV444P10BE:
333	case AV_PIX_FMT_YUV444P12LE:
334	case AV_PIX_FMT_YUV444P12BE:
335	case AV_PIX_FMT_YUV444P14LE:
336	case AV_PIX_FMT_YUV444P14BE:
337	case AV_PIX_FMT_YUV444P16LE:
338	case AV_PIX_FMT_YUV444P16BE:
339	case AV_PIX_FMT_YUVA444P9LE:
340	case AV_PIX_FMT_YUVA444P9BE:
341	case AV_PIX_FMT_YUVA444P10LE:
342	case AV_PIX_FMT_YUVA444P10BE:
343	case AV_PIX_FMT_YUVA444P16LE:
344	case AV_PIX_FMT_YUVA444P16BE:
345	case AV_PIX_FMT_GBRP9LE:
346	case AV_PIX_FMT_GBRP9BE:
347	case AV_PIX_FMT_GBRP10LE:
348	case AV_PIX_FMT_GBRP10BE:
349	case AV_PIX_FMT_GBRP12LE:
350	case AV_PIX_FMT_GBRP12BE:
351	case AV_PIX_FMT_GBRP14LE:
352	case AV_PIX_FMT_GBRP14BE:
353	case AV_PIX_FMT_GBRP16LE:
354	case AV_PIX_FMT_GBRP16BE:
355	case AV_PIX_FMT_GBRAP12LE:
356	case AV_PIX_FMT_GBRAP12BE:
357	case AV_PIX_FMT_GBRAP16LE:
358	case AV_PIX_FMT_GBRAP16BE:
359	w_align = 16; //FIXME assume 16 pixel per macroblock
360	h_align = 16 * 2; // interlaced needs 2 macroblocks height
361	break;
362	case AV_PIX_FMT_YUV411P:
363	case AV_PIX_FMT_YUVJ411P:
364	case AV_PIX_FMT_UYYVYY411:
365	w_align = 32;
366	h_align = 16 * 2;
367	break;
368	case AV_PIX_FMT_YUV410P:
369	if (s->codec_id == AV_CODEC_ID_SVQ1) {
370	w_align = 64;
371	h_align = 64;
372	}
373	break;
374	case AV_PIX_FMT_RGB555:
375	if (s->codec_id == AV_CODEC_ID_RPZA) {
376	w_align = 4;
377	h_align = 4;
378	}
379	if (s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
380	w_align = 8;
381	h_align = 8;
382	}
383	break;
384	case AV_PIX_FMT_PAL8:
385	case AV_PIX_FMT_BGR8:
386	case AV_PIX_FMT_RGB8:
387	if (s->codec_id == AV_CODEC_ID_SMC ||
388	s->codec_id == AV_CODEC_ID_CINEPAK) {
389	w_align = 4;
390	h_align = 4;
391	}
392	if (s->codec_id == AV_CODEC_ID_JV ||
393	s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
394	w_align = 8;
395	h_align = 8;
396	}
397	break;
398	case AV_PIX_FMT_BGR24:
399	if ((s->codec_id == AV_CODEC_ID_MSZH) ||
400	(s->codec_id == AV_CODEC_ID_ZLIB)) {
401	w_align = 4;
402	h_align = 4;
403	}
404	break;
405	case AV_PIX_FMT_RGB24:
406	if (s->codec_id == AV_CODEC_ID_CINEPAK) {
407	w_align = 4;
408	h_align = 4;
409	}
410	break;
411	default:
412	break;
413	}
414
415	if (s->codec_id == AV_CODEC_ID_IFF_ILBM) {
416	w_align = FFMAX(w_align, 8);
417	}
418
419	*width = FFALIGN(*width, w_align);
420	*height = FFALIGN(*height, h_align);
421	if (s->codec_id == AV_CODEC_ID_H264 || s->lowres) {
422	// some of the optimized chroma MC reads one line too much
423	// which is also done in mpeg decoders with lowres > 0
424	*height += 2;
425
426	// H.264 uses edge emulation for out of frame motion vectors, for this
427	// it requires a temporary area large enough to hold a 21x21 block,
428	// increasing witdth ensure that the temporary area is large enough,
429	// the next rounded up width is 32
430	*width = FFMAX(*width, 32);
431	}
432
433	for (i = 0; i < 4; i++)
434	linesize_align[i] = STRIDE_ALIGN;
435	}
436
437	void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
438	{
439	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
440	int chroma_shift = desc->log2_chroma_w;
441	int linesize_align[AV_NUM_DATA_POINTERS];
442	int align;
443
444	avcodec_align_dimensions2(s, width, height, linesize_align);
445	align = FFMAX(linesize_align[0], linesize_align[3]);
446	linesize_align[1] <<= chroma_shift;
447	linesize_align[2] <<= chroma_shift;
448	align = FFMAX3(align, linesize_align[1], linesize_align[2]);
449	*width = FFALIGN(*width, align);
450	}
451
452	int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
453	{
454	if (pos <= AVCHROMA_LOC_UNSPECIFIED || pos >= AVCHROMA_LOC_NB)
455	return AVERROR(EINVAL);
456	pos--;
457
458	*xpos = (pos&1) * 128;
459	*ypos = ((pos>>1)^(pos<4)) * 128;
460
461	return 0;
462	}
463
464	enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
465	{
466	int pos, xout, yout;
467
468	for (pos = AVCHROMA_LOC_UNSPECIFIED + 1; pos < AVCHROMA_LOC_NB; pos++) {
469	if (avcodec_enum_to_chroma_pos(&xout, &yout, pos) == 0 && xout == xpos && yout == ypos)
470	return pos;
471	}
472	return AVCHROMA_LOC_UNSPECIFIED;
473	}
474
475	int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
476	enum AVSampleFormat sample_fmt, const uint8_t *buf,
477	int buf_size, int align)
478	{
479	int ch, planar, needed_size, ret = 0;
480
481	needed_size = av_samples_get_buffer_size(NULL, nb_channels,
482	frame->nb_samples, sample_fmt,
483	align);
484	if (buf_size < needed_size)
485	return AVERROR(EINVAL);
486
487	planar = av_sample_fmt_is_planar(sample_fmt);
488	if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
489	if (!(frame->extended_data = av_mallocz_array(nb_channels,
490	sizeof(*frame->extended_data))))
491	return AVERROR(ENOMEM);
492	} else {
493	frame->extended_data = frame->data;
494	}
495
496	if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
497	(uint8_t *)(intptr_t)buf, nb_channels, frame->nb_samples,
498	sample_fmt, align)) < 0) {
499	if (frame->extended_data != frame->data)
500	av_freep(&frame->extended_data);
501	return ret;
502	}
503	if (frame->extended_data != frame->data) {
504	for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
505	frame->data[ch] = frame->extended_data[ch];
506	}
507
508	return ret;
509	}
510
511	static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
512	{
513	FramePool *pool = avctx->internal->pool;
514	int i, ret;
515
516	switch (avctx->codec_type) {
517	case AVMEDIA_TYPE_VIDEO: {
518	uint8_t *data[4];
519	int linesize[4];
520	int size[4] = { 0 };
521	int w = frame->width;
522	int h = frame->height;
523	int tmpsize, unaligned;
524
525	if (pool->format == frame->format &&
526	pool->width == frame->width && pool->height == frame->height)
527	return 0;
528
529	avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
530
531	do {
532	// NOTE: do not align linesizes individually, this breaks e.g. assumptions
533	// that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
534	ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
535	if (ret < 0)
536	return ret;
537	// increase alignment of w for next try (rhs gives the lowest bit set in w)
538	w += w & ~(w - 1);
539
540	unaligned = 0;
541	for (i = 0; i < 4; i++)
542	unaligned |= linesize[i] % pool->stride_align[i];
543	} while (unaligned);
544
545	tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h,
546	NULL, linesize);
547	if (tmpsize < 0)
548	return -1;
549
550	for (i = 0; i < 3 && data[i + 1]; i++)
551	size[i] = data[i + 1] - data[i];
552	size[i] = tmpsize - (data[i] - data[0]);
553
554	for (i = 0; i < 4; i++) {
555	av_buffer_pool_uninit(&pool->pools[i]);
556	pool->linesize[i] = linesize[i];
557	if (size[i]) {
558	pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
559	CONFIG_MEMORY_POISONING ?
560	NULL :
561	av_buffer_allocz);
562	if (!pool->pools[i]) {
563	ret = AVERROR(ENOMEM);
564	goto fail;
565	}
566	}
567	}
568	pool->format = frame->format;
569	pool->width = frame->width;
570	pool->height = frame->height;
571
572	break;
573	}
574	case AVMEDIA_TYPE_AUDIO: {
575	int ch = av_frame_get_channels(frame); //av_get_channel_layout_nb_channels(frame->channel_layout);
576	int planar = av_sample_fmt_is_planar(frame->format);
577	int planes = planar ? ch : 1;
578
579	if (pool->format == frame->format && pool->planes == planes &&
580	pool->channels == ch && frame->nb_samples == pool->samples)
581	return 0;
582
583	av_buffer_pool_uninit(&pool->pools[0]);
584	ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
585	frame->nb_samples, frame->format, 0);
586	if (ret < 0)
587	goto fail;
588
589	pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
590	if (!pool->pools[0]) {
591	ret = AVERROR(ENOMEM);
592	goto fail;
593	}
594
595	pool->format = frame->format;
596	pool->planes = planes;
597	pool->channels = ch;
598	pool->samples = frame->nb_samples;
599	break;
600	}
601	default: av_assert0(0);
602	}
603	return 0;
604	fail:
605	for (i = 0; i < 4; i++)
606	av_buffer_pool_uninit(&pool->pools[i]);
607	pool->format = -1;
608	pool->planes = pool->channels = pool->samples = 0;
609	pool->width = pool->height = 0;
610	return ret;
611	}
612
613	static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
614	{
615	FramePool *pool = avctx->internal->pool;
616	int planes = pool->planes;
617	int i;
618
619	frame->linesize[0] = pool->linesize[0];
620
621	if (planes > AV_NUM_DATA_POINTERS) {
622	frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
623	frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
624	frame->extended_buf = av_mallocz_array(frame->nb_extended_buf,
625	sizeof(*frame->extended_buf));
626	if (!frame->extended_data || !frame->extended_buf) {
627	av_freep(&frame->extended_data);
628	av_freep(&frame->extended_buf);
629	return AVERROR(ENOMEM);
630	}
631	} else {
632	frame->extended_data = frame->data;
633	av_assert0(frame->nb_extended_buf == 0);
634	}
635
636	for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
637	frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
638	if (!frame->buf[i])
639	goto fail;
640	frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
641	}
642	for (i = 0; i < frame->nb_extended_buf; i++) {
643	frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
644	if (!frame->extended_buf[i])
645	goto fail;
646	frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
647	}
648
649	if (avctx->debug & FF_DEBUG_BUFFERS)
650	av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
651
652	return 0;
653	fail:
654	av_frame_unref(frame);
655	return AVERROR(ENOMEM);
656	}
657
658	static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
659	{
660	FramePool *pool = s->internal->pool;
661	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
662	int i;
663
664	if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
665	av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
666	return -1;
667	}
668
669	if (!desc) {
670	av_log(s, AV_LOG_ERROR,
671	"Unable to get pixel format descriptor for format %s\n",
672	av_get_pix_fmt_name(pic->format));
673	return AVERROR(EINVAL);
674	}
675
676	memset(pic->data, 0, sizeof(pic->data));
677	pic->extended_data = pic->data;
678
679	for (i = 0; i < 4 && pool->pools[i]; i++) {
680	pic->linesize[i] = pool->linesize[i];
681
682	pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
683	if (!pic->buf[i])
684	goto fail;
685
686	pic->data[i] = pic->buf[i]->data;
687	}
688	for (; i < AV_NUM_DATA_POINTERS; i++) {
689	pic->data[i] = NULL;
690	pic->linesize[i] = 0;
691	}
692	if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
693	desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
694	avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
695
696	if (s->debug & FF_DEBUG_BUFFERS)
697	av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
698
699	return 0;
700	fail:
701	av_frame_unref(pic);
702	return AVERROR(ENOMEM);
703	}
704
705	void ff_color_frame(AVFrame *frame, const int c[4])
706	{
707	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
708	int p, y, x;
709
710	av_assert0(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
711
712	for (p = 0; p<desc->nb_components; p++) {
713	uint8_t *dst = frame->data[p];
714	int is_chroma = p == 1 || p == 2;
715	int bytes = is_chroma ? AV_CEIL_RSHIFT(frame->width, desc->log2_chroma_w) : frame->width;
716	int height = is_chroma ? AV_CEIL_RSHIFT(frame->height, desc->log2_chroma_h) : frame->height;
717	for (y = 0; y < height; y++) {
718	if (desc->comp[0].depth >= 9) {
719	for (x = 0; x<bytes; x++)
720	((uint16_t*)dst)[x] = c[p];
721	}else
722	memset(dst, c[p], bytes);
723	dst += frame->linesize[p];
724	}
725	}
726	}
727
728	int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
729	{
730	int ret;
731
732	if (avctx->hw_frames_ctx)
733	return av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
734
735	if ((ret = update_frame_pool(avctx, frame)) < 0)
736	return ret;
737
738	switch (avctx->codec_type) {
739	case AVMEDIA_TYPE_VIDEO:
740	return video_get_buffer(avctx, frame);
741	case AVMEDIA_TYPE_AUDIO:
742	return audio_get_buffer(avctx, frame);
743	default:
744	return -1;
745	}
746	}
747
748	static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
749	{
750	int size;
751	const uint8_t *side_metadata;
752
753	AVDictionary **frame_md = avpriv_frame_get_metadatap(frame);
754
755	side_metadata = av_packet_get_side_data(avpkt,
756	AV_PKT_DATA_STRINGS_METADATA, &size);
757	return av_packet_unpack_dictionary(side_metadata, size, frame_md);
758	}
759
760	int ff_init_buffer_info(AVCodecContext *avctx, AVFrame *frame)
761	{
762	const AVPacket *pkt = avctx->internal->pkt;
763	int i;
764	static const struct {
765	enum AVPacketSideDataType packet;
766	enum AVFrameSideDataType frame;
767	} sd[] = {
768	{ AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN },
769	{ AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
770	{ AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL },
771	{ AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D },
772	{ AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
773	{ AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
774	};
775
776	if (pkt) {
777	frame->pts = pkt->pts;
778	#if FF_API_PKT_PTS
779	FF_DISABLE_DEPRECATION_WARNINGS
780	frame->pkt_pts = pkt->pts;
781	FF_ENABLE_DEPRECATION_WARNINGS
782	#endif
783	av_frame_set_pkt_pos (frame, pkt->pos);
784	av_frame_set_pkt_duration(frame, pkt->duration);
785	av_frame_set_pkt_size (frame, pkt->size);
786
787	for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
788	int size;
789	uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
790	if (packet_sd) {
791	AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
792	sd[i].frame,
793	size);
794	if (!frame_sd)
795	return AVERROR(ENOMEM);
796
797	memcpy(frame_sd->data, packet_sd, size);
798	}
799	}
800	add_metadata_from_side_data(pkt, frame);
801
802	if (pkt->flags & AV_PKT_FLAG_DISCARD) {
803	frame->flags |= AV_FRAME_FLAG_DISCARD;
804	} else {
805	frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
806	}
807	} else {
808	frame->pts = AV_NOPTS_VALUE;
809	#if FF_API_PKT_PTS
810	FF_DISABLE_DEPRECATION_WARNINGS
811	frame->pkt_pts = AV_NOPTS_VALUE;
812	FF_ENABLE_DEPRECATION_WARNINGS
813	#endif
814	av_frame_set_pkt_pos (frame, -1);
815	av_frame_set_pkt_duration(frame, 0);
816	av_frame_set_pkt_size (frame, -1);
817	}
818	frame->reordered_opaque = avctx->reordered_opaque;
819
820	if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
821	frame->color_primaries = avctx->color_primaries;
822	if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
823	frame->color_trc = avctx->color_trc;
824	if (av_frame_get_colorspace(frame) == AVCOL_SPC_UNSPECIFIED)
825	av_frame_set_colorspace(frame, avctx->colorspace);
826	if (av_frame_get_color_range(frame) == AVCOL_RANGE_UNSPECIFIED)
827	av_frame_set_color_range(frame, avctx->color_range);
828	if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED)
829	frame->chroma_location = avctx->chroma_sample_location;
830
831	switch (avctx->codec->type) {
832	case AVMEDIA_TYPE_VIDEO:
833	frame->format = avctx->pix_fmt;
834	if (!frame->sample_aspect_ratio.num)
835	frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
836
837	if (frame->width && frame->height &&
838	av_image_check_sar(frame->width, frame->height,
839	frame->sample_aspect_ratio) < 0) {
840	av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
841	frame->sample_aspect_ratio.num,
842	frame->sample_aspect_ratio.den);
843	frame->sample_aspect_ratio = (AVRational){ 0, 1 };
844	}
845
846	break;
847	case AVMEDIA_TYPE_AUDIO:
848	if (!frame->sample_rate)
849	frame->sample_rate = avctx->sample_rate;
850	if (frame->format < 0)
851	frame->format = avctx->sample_fmt;
852	if (!frame->channel_layout) {
853	if (avctx->channel_layout) {
854	if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
855	avctx->channels) {
856	av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
857	"configuration.\n");
858	return AVERROR(EINVAL);
859	}
860
861	frame->channel_layout = avctx->channel_layout;
862	} else {
863	if (avctx->channels > FF_SANE_NB_CHANNELS) {
864	av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
865	avctx->channels);
866	return AVERROR(ENOSYS);
867	}
868	}
869	}
870	av_frame_set_channels(frame, avctx->channels);
871	break;
872	}
873	return 0;
874	}
875
876	int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
877	{
878	return ff_init_buffer_info(avctx, frame);
879	}
880
881	static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
882	{
883	if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
884	int i;
885	int num_planes = av_pix_fmt_count_planes(frame->format);
886	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
887	int flags = desc ? desc->flags : 0;
888	if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
889	num_planes = 2;
890	for (i = 0; i < num_planes; i++) {
891	av_assert0(frame->data[i]);
892	}
893	// For now do not enforce anything for palette of pseudopal formats
894	if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PSEUDOPAL))
895	num_planes = 2;
896	// For formats without data like hwaccel allow unused pointers to be non-NULL.
897	for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
898	if (frame->data[i])
899	av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
900	frame->data[i] = NULL;
901	}
902	}
903	}
904
905	static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
906	{
907	const AVHWAccel *hwaccel = avctx->hwaccel;
908	int override_dimensions = 1;
909	int ret;
910
911	if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
912	if ((ret = av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) {
913	av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
914	return AVERROR(EINVAL);
915	}
916
917	if (frame->width <= 0 || frame->height <= 0) {
918	frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
919	frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
920	override_dimensions = 0;
921	}
922
923	if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
924	av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
925	return AVERROR(EINVAL);
926	}
927	}
928	ret = ff_decode_frame_props(avctx, frame);
929	if (ret < 0)
930	return ret;
931
932	if (hwaccel) {
933	if (hwaccel->alloc_frame) {
934	ret = hwaccel->alloc_frame(avctx, frame);
935	goto end;
936	}
937	} else
938	avctx->sw_pix_fmt = avctx->pix_fmt;
939
940	ret = avctx->get_buffer2(avctx, frame, flags);
941	if (ret >= 0)
942	validate_avframe_allocation(avctx, frame);
943
944	end:
945	if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions) {
946	frame->width = avctx->width;
947	frame->height = avctx->height;
948	}
949
950	return ret;
951	}
952
953	int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
954	{
955	int ret = get_buffer_internal(avctx, frame, flags);
956	if (ret < 0) {
957	av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
958	frame->width = frame->height = 0;
959	}
960	return ret;
961	}
962
963	static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame)
964	{
965	AVFrame *tmp;
966	int ret;
967
968	av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
969
970	if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
971	av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
972	frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
973	av_frame_unref(frame);
974	}
975
976	ff_init_buffer_info(avctx, frame);
977
978	if (!frame->data[0])
979	return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
980
981	if (av_frame_is_writable(frame))
982	return ff_decode_frame_props(avctx, frame);
983
984	tmp = av_frame_alloc();
985	if (!tmp)
986	return AVERROR(ENOMEM);
987
988	av_frame_move_ref(tmp, frame);
989
990	ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
991	if (ret < 0) {
992	av_frame_free(&tmp);
993	return ret;
994	}
995
996	av_frame_copy(frame, tmp);
997	av_frame_free(&tmp);
998
999	return 0;
1000	}
1001
1002	int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
1003	{
1004	int ret = reget_buffer_internal(avctx, frame);
1005	if (ret < 0)
1006	av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
1007	return ret;
1008	}
1009
1010	int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
1011	{
1012	int i;
1013
1014	for (i = 0; i < count; i++) {
1015	int r = func(c, (char *)arg + i * size);
1016	if (ret)
1017	ret[i] = r;
1018	}
1019	emms_c();
1020	return 0;
1021	}
1022
1023	int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
1024	{
1025	int i;
1026
1027	for (i = 0; i < count; i++) {
1028	int r = func(c, arg, i, 0);
1029	if (ret)
1030	ret[i] = r;
1031	}
1032	emms_c();
1033	return 0;
1034	}
1035
1036	enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
1037	unsigned int fourcc)
1038	{
1039	while (tags->pix_fmt >= 0) {
1040	if (tags->fourcc == fourcc)
1041	return tags->pix_fmt;
1042	tags++;
1043	}
1044	return AV_PIX_FMT_NONE;
1045	}
1046
1047	static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
1048	{
1049	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
1050	return desc->flags & AV_PIX_FMT_FLAG_HWACCEL;
1051	}
1052
1053	enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
1054	{
1055	while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
1056	++fmt;
1057	return fmt[0];
1058	}
1059
1060	static AVHWAccel *find_hwaccel(enum AVCodecID codec_id,
1061	enum AVPixelFormat pix_fmt)
1062	{
1063	AVHWAccel *hwaccel = NULL;
1064
1065	while ((hwaccel = av_hwaccel_next(hwaccel)))
1066	if (hwaccel->id == codec_id
1067	&& hwaccel->pix_fmt == pix_fmt)
1068	return hwaccel;
1069	return NULL;
1070	}
1071
1072	static int setup_hwaccel(AVCodecContext *avctx,
1073	const enum AVPixelFormat fmt,
1074	const char *name)
1075	{
1076	AVHWAccel *hwa = find_hwaccel(avctx->codec_id, fmt);
1077	int ret = 0;
1078
1079	if (!hwa) {
1080	av_log(avctx, AV_LOG_ERROR,
1081	"Could not find an AVHWAccel for the pixel format: %s",
1082	name);
1083	return AVERROR(ENOENT);
1084	}
1085
1086	if (hwa->capabilities & HWACCEL_CODEC_CAP_EXPERIMENTAL &&
1087	avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1088	av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
1089	hwa->name);
1090	return AVERROR_PATCHWELCOME;
1091	}
1092
1093	if (hwa->priv_data_size) {
1094	avctx->internal->hwaccel_priv_data = av_mallocz(hwa->priv_data_size);
1095	if (!avctx->internal->hwaccel_priv_data)
1096	return AVERROR(ENOMEM);
1097	}
1098
1099	if (hwa->init) {
1100	ret = hwa->init(avctx);
1101	if (ret < 0) {
1102	av_freep(&avctx->internal->hwaccel_priv_data);
1103	return ret;
1104	}
1105	}
1106
1107	avctx->hwaccel = hwa;
1108
1109	return 0;
1110	}
1111
1112	int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
1113	{
1114	const AVPixFmtDescriptor *desc;
1115	enum AVPixelFormat *choices;
1116	enum AVPixelFormat ret;
1117	unsigned n = 0;
1118
1119	while (fmt[n] != AV_PIX_FMT_NONE)
1120	++n;
1121
1122	av_assert0(n >= 1);
1123	avctx->sw_pix_fmt = fmt[n - 1];
1124	av_assert2(!is_hwaccel_pix_fmt(avctx->sw_pix_fmt));
1125
1126	choices = av_malloc_array(n + 1, sizeof(*choices));
1127	if (!choices)
1128	return AV_PIX_FMT_NONE;
1129
1130	memcpy(choices, fmt, (n + 1) * sizeof(*choices));
1131
1132	for (;;) {
1133	if (avctx->hwaccel && avctx->hwaccel->uninit)
1134	avctx->hwaccel->uninit(avctx);
1135	av_freep(&avctx->internal->hwaccel_priv_data);
1136	avctx->hwaccel = NULL;
1137
1138	av_buffer_unref(&avctx->hw_frames_ctx);
1139
1140	ret = avctx->get_format(avctx, choices);
1141
1142	desc = av_pix_fmt_desc_get(ret);
1143	if (!desc) {
1144	ret = AV_PIX_FMT_NONE;
1145	break;
1146	}
1147
1148	if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
1149	break;
1150	#if FF_API_CAP_VDPAU
1151	if (avctx->codec->capabilities&AV_CODEC_CAP_HWACCEL_VDPAU)
1152	break;
1153	#endif
1154
1155	if (avctx->hw_frames_ctx) {
1156	AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1157	if (hw_frames_ctx->format != ret) {
1158	av_log(avctx, AV_LOG_ERROR, "Format returned from get_buffer() "
1159	"does not match the format of provided AVHWFramesContext\n");
1160	ret = AV_PIX_FMT_NONE;
1161	break;
1162	}
1163	}
1164
1165	if (!setup_hwaccel(avctx, ret, desc->name))
1166	break;
1167
1168	/* Remove failed hwaccel from choices */
1169	for (n = 0; choices[n] != ret; n++)
1170	av_assert0(choices[n] != AV_PIX_FMT_NONE);
1171
1172	do
1173	choices[n] = choices[n + 1];
1174	while (choices[n++] != AV_PIX_FMT_NONE);
1175	}
1176
1177	av_freep(&choices);
1178	return ret;
1179	}
1180
1181	MAKE_ACCESSORS(AVCodecContext, codec, AVRational, pkt_timebase)
1182	MAKE_ACCESSORS(AVCodecContext, codec, const AVCodecDescriptor *, codec_descriptor)
1183	MAKE_ACCESSORS(AVCodecContext, codec, int, lowres)
1184	MAKE_ACCESSORS(AVCodecContext, codec, int, seek_preroll)
1185	MAKE_ACCESSORS(AVCodecContext, codec, uint16_t*, chroma_intra_matrix)
1186
1187	unsigned av_codec_get_codec_properties(const AVCodecContext *codec)
1188	{
1189	return codec->properties;
1190	}
1191
1192	int av_codec_get_max_lowres(const AVCodec *codec)
1193	{
1194	return codec->max_lowres;
1195	}
1196
1197	int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec){
1198	return !!(codec->caps_internal & FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM);
1199	}
1200
1201	static void get_subtitle_defaults(AVSubtitle *sub)
1202	{
1203	memset(sub, 0, sizeof(*sub));
1204	sub->pts = AV_NOPTS_VALUE;
1205	}
1206
1207	static int64_t get_bit_rate(AVCodecContext *ctx)
1208	{
1209	int64_t bit_rate;
1210	int bits_per_sample;
1211
1212	switch (ctx->codec_type) {
1213	case AVMEDIA_TYPE_VIDEO:
1214	case AVMEDIA_TYPE_DATA:
1215	case AVMEDIA_TYPE_SUBTITLE:
1216	case AVMEDIA_TYPE_ATTACHMENT:
1217	bit_rate = ctx->bit_rate;
1218	break;
1219	case AVMEDIA_TYPE_AUDIO:
1220	bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1221	bit_rate = bits_per_sample ? ctx->sample_rate * (int64_t)ctx->channels * bits_per_sample : ctx->bit_rate;
1222	break;
1223	default:
1224	bit_rate = 0;
1225	break;
1226	}
1227	return bit_rate;
1228	}
1229
1230	int attribute_align_arg ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
1231	{
1232	int ret = 0;
1233
1234	ff_unlock_avcodec(codec);
1235
1236	ret = avcodec_open2(avctx, codec, options);
1237
1238	ff_lock_avcodec(avctx, codec);
1239	return ret;
1240	}
1241
1242	int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
1243	{
1244	int ret = 0;
1245	AVDictionary *tmp = NULL;
1246	const AVPixFmtDescriptor *pixdesc;
1247
1248	if (avcodec_is_open(avctx))
1249	return 0;
1250
1251	if ((!codec && !avctx->codec)) {
1252	av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
1253	return AVERROR(EINVAL);
1254	}
1255	if ((codec && avctx->codec && codec != avctx->codec)) {
1256	av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
1257	"but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
1258	return AVERROR(EINVAL);
1259	}
1260	if (!codec)
1261	codec = avctx->codec;
1262
1263	if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
1264	return AVERROR(EINVAL);
1265
1266	if (options)
1267	av_dict_copy(&tmp, *options, 0);
1268
1269	ret = ff_lock_avcodec(avctx, codec);
1270	if (ret < 0)
1271	return ret;
1272
1273	avctx->internal = av_mallocz(sizeof(AVCodecInternal));
1274	if (!avctx->internal) {
1275	ret = AVERROR(ENOMEM);
1276	goto end;
1277	}
1278
1279	avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
1280	if (!avctx->internal->pool) {
1281	ret = AVERROR(ENOMEM);
1282	goto free_and_end;
1283	}
1284
1285	avctx->internal->to_free = av_frame_alloc();
1286	if (!avctx->internal->to_free) {
1287	ret = AVERROR(ENOMEM);
1288	goto free_and_end;
1289	}
1290
1291	avctx->internal->buffer_frame = av_frame_alloc();
1292	if (!avctx->internal->buffer_frame) {
1293	ret = AVERROR(ENOMEM);
1294	goto free_and_end;
1295	}
1296
1297	avctx->internal->buffer_pkt = av_packet_alloc();
1298	if (!avctx->internal->buffer_pkt) {
1299	ret = AVERROR(ENOMEM);
1300	goto free_and_end;
1301	}
1302
1303	avctx->internal->skip_samples_multiplier = 1;
1304
1305	if (codec->priv_data_size > 0) {
1306	if (!avctx->priv_data) {
1307	avctx->priv_data = av_mallocz(codec->priv_data_size);
1308	if (!avctx->priv_data) {
1309	ret = AVERROR(ENOMEM);
1310	goto end;
1311	}
1312	if (codec->priv_class) {
1313	*(const AVClass **)avctx->priv_data = codec->priv_class;
1314	av_opt_set_defaults(avctx->priv_data);
1315	}
1316	}
1317	if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
1318	goto free_and_end;
1319	} else {
1320	avctx->priv_data = NULL;
1321	}
1322	if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
1323	goto free_and_end;
1324
1325	if (avctx->codec_whitelist && av_match_list(codec->name, avctx->codec_whitelist, ',') <= 0) {
1326	av_log(avctx, AV_LOG_ERROR, "Codec (%s) not on whitelist \'%s\'\n", codec->name, avctx->codec_whitelist);
1327	ret = AVERROR(EINVAL);
1328	goto free_and_end;
1329	}
1330
1331	// only call ff_set_dimensions() for non H.264/VP6F/DXV codecs so as not to overwrite previously setup dimensions
1332	if (!(avctx->coded_width && avctx->coded_height && avctx->width && avctx->height &&
1333	(avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_VP6F || avctx->codec_id == AV_CODEC_ID_DXV))) {
1334	if (avctx->coded_width && avctx->coded_height)
1335	ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
1336	else if (avctx->width && avctx->height)
1337	ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
1338	if (ret < 0)
1339	goto free_and_end;
1340	}
1341
1342	if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
1343	&& ( av_image_check_size2(avctx->coded_width, avctx->coded_height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0
1344	|| av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0)) {
1345	av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
1346	ff_set_dimensions(avctx, 0, 0);
1347	}
1348
1349	if (avctx->width > 0 && avctx->height > 0) {
1350	if (av_image_check_sar(avctx->width, avctx->height,
1351	avctx->sample_aspect_ratio) < 0) {
1352	av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1353	avctx->sample_aspect_ratio.num,
1354	avctx->sample_aspect_ratio.den);
1355	avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
1356	}
1357	}
1358
1359	/* if the decoder init function was already called previously,
1360	* free the already allocated subtitle_header before overwriting it */
1361	if (av_codec_is_decoder(codec))
1362	av_freep(&avctx->subtitle_header);
1363
1364	if (avctx->channels > FF_SANE_NB_CHANNELS) {
1365	ret = AVERROR(EINVAL);
1366	goto free_and_end;
1367	}
1368
1369	avctx->codec = codec;
1370	if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
1371	avctx->codec_id == AV_CODEC_ID_NONE) {
1372	avctx->codec_type = codec->type;
1373	avctx->codec_id = codec->id;
1374	}
1375	if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
1376	&& avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
1377	av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
1378	ret = AVERROR(EINVAL);
1379	goto free_and_end;
1380	}
1381	avctx->frame_number = 0;
1382	avctx->codec_descriptor = avcodec_descriptor_get(avctx->codec_id);
1383
1384	if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&
1385	avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1386	const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
1387	AVCodec *codec2;
1388	av_log(avctx, AV_LOG_ERROR,
1389	"The %s '%s' is experimental but experimental codecs are not enabled, "
1390	"add '-strict %d' if you want to use it.\n",
1391	codec_string, codec->name, FF_COMPLIANCE_EXPERIMENTAL);
1392	codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
1393	if (!(codec2->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
1394	av_log(avctx, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
1395	codec_string, codec2->name);
1396	ret = AVERROR_EXPERIMENTAL;
1397	goto free_and_end;
1398	}
1399
1400	if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
1401	(!avctx->time_base.num || !avctx->time_base.den)) {
1402	avctx->time_base.num = 1;
1403	avctx->time_base.den = avctx->sample_rate;
1404	}
1405
1406	if (!HAVE_THREADS)
1407	av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");
1408
1409	if (CONFIG_FRAME_THREAD_ENCODER && av_codec_is_encoder(avctx->codec)) {
1410	ff_unlock_avcodec(codec); //we will instantiate a few encoders thus kick the counter to prevent false detection of a problem
1411	ret = ff_frame_thread_encoder_init(avctx, options ? *options : NULL);
1412	ff_lock_avcodec(avctx, codec);
1413	if (ret < 0)
1414	goto free_and_end;
1415	}
1416
1417	if (HAVE_THREADS
1418	&& !(avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) {
1419	ret = ff_thread_init(avctx);
1420	if (ret < 0) {
1421	goto free_and_end;
1422	}
1423	}
1424	if (!HAVE_THREADS && !(codec->capabilities & AV_CODEC_CAP_AUTO_THREADS))
1425	avctx->thread_count = 1;
1426
1427	if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
1428	av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
1429	avctx->codec->max_lowres);
1430	avctx->lowres = avctx->codec->max_lowres;
1431	}
1432
1433	#if FF_API_VISMV
1434	if (avctx->debug_mv)
1435	av_log(avctx, AV_LOG_WARNING, "The 'vismv' option is deprecated, "
1436	"see the codecview filter instead.\n");
1437	#endif
1438
1439	if (av_codec_is_encoder(avctx->codec)) {
1440	int i;
1441	#if FF_API_CODED_FRAME
1442	FF_DISABLE_DEPRECATION_WARNINGS
1443	avctx->coded_frame = av_frame_alloc();
1444	if (!avctx->coded_frame) {
1445	ret = AVERROR(ENOMEM);
1446	goto free_and_end;
1447	}
1448	FF_ENABLE_DEPRECATION_WARNINGS
1449	#endif
1450
1451	if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
1452	av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
1453	ret = AVERROR(EINVAL);
1454	goto free_and_end;
1455	}
1456
1457	if (avctx->codec->sample_fmts) {
1458	for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
1459	if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
1460	break;
1461	if (avctx->channels == 1 &&
1462	av_get_planar_sample_fmt(avctx->sample_fmt) ==
1463	av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
1464	avctx->sample_fmt = avctx->codec->sample_fmts[i];
1465	break;
1466	}
1467	}
1468	if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
1469	char buf[128];
1470	snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
1471	av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
1472	(char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
1473	ret = AVERROR(EINVAL);
1474	goto free_and_end;
1475	}
1476	}
1477	if (avctx->codec->pix_fmts) {
1478	for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
1479	if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
1480	break;
1481	if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE
1482	&& !((avctx->codec_id == AV_CODEC_ID_MJPEG || avctx->codec_id == AV_CODEC_ID_LJPEG)
1483	&& avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL)) {
1484	char buf[128];
1485	snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
1486	av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
1487	(char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
1488	ret = AVERROR(EINVAL);
1489	goto free_and_end;
1490	}
1491	if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
1492	avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
1493	avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
1494	avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
1495	avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
1496	avctx->color_range = AVCOL_RANGE_JPEG;
1497	}
1498	if (avctx->codec->supported_samplerates) {
1499	for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
1500	if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
1501	break;
1502	if (avctx->codec->supported_samplerates[i] == 0) {
1503	av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
1504	avctx->sample_rate);
1505	ret = AVERROR(EINVAL);
1506	goto free_and_end;
1507	}
1508	}
1509	if (avctx->sample_rate < 0) {
1510	av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
1511	avctx->sample_rate);
1512	ret = AVERROR(EINVAL);
1513	goto free_and_end;
1514	}
1515	if (avctx->codec->channel_layouts) {
1516	if (!avctx->channel_layout) {
1517	av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
1518	} else {
1519	for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
1520	if (avctx->channel_layout == avctx->codec->channel_layouts[i])
1521	break;
1522	if (avctx->codec->channel_layouts[i] == 0) {
1523	char buf[512];
1524	av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
1525	av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
1526	ret = AVERROR(EINVAL);
1527	goto free_and_end;
1528	}
1529	}
1530	}
1531	if (avctx->channel_layout && avctx->channels) {
1532	int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1533	if (channels != avctx->channels) {
1534	char buf[512];
1535	av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
1536	av_log(avctx, AV_LOG_ERROR,
1537	"Channel layout '%s' with %d channels does not match number of specified channels %d\n",
1538	buf, channels, avctx->channels);
1539	ret = AVERROR(EINVAL);
1540	goto free_and_end;
1541	}
1542	} else if (avctx->channel_layout) {
1543	avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1544	}
1545	if (avctx->channels < 0) {
1546	av_log(avctx, AV_LOG_ERROR, "Specified number of channels %d is not supported\n",
1547	avctx->channels);
1548	ret = AVERROR(EINVAL);
1549	goto free_and_end;
1550	}
1551	if(avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1552	pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
1553	if ( avctx->bits_per_raw_sample < 0
1554	|| (avctx->bits_per_raw_sample > 8 && pixdesc->comp[0].depth <= 8)) {
1555	av_log(avctx, AV_LOG_WARNING, "Specified bit depth %d not possible with the specified pixel formats depth %d\n",
1556	avctx->bits_per_raw_sample, pixdesc->comp[0].depth);
1557	avctx->bits_per_raw_sample = pixdesc->comp[0].depth;
1558	}
1559	if (avctx->width <= 0 || avctx->height <= 0) {
1560	av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
1561	ret = AVERROR(EINVAL);
1562	goto free_and_end;
1563	}
1564	}
1565	if ( (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
1566	&& avctx->bit_rate>0 && avctx->bit_rate<1000) {
1567	av_log(avctx, AV_LOG_WARNING, "Bitrate %"PRId64" is extremely low, maybe you mean %"PRId64"k\n", (int64_t)avctx->bit_rate, (int64_t)avctx->bit_rate);
1568	}
1569
1570	if (!avctx->rc_initial_buffer_occupancy)
1571	avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1572
1573	if (avctx->ticks_per_frame && avctx->time_base.num &&
1574	avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
1575	av_log(avctx, AV_LOG_ERROR,
1576	"ticks_per_frame %d too large for the timebase %d/%d.",
1577	avctx->ticks_per_frame,
1578	avctx->time_base.num,
1579	avctx->time_base.den);
1580	goto free_and_end;
1581	}
1582
1583	if (avctx->hw_frames_ctx) {
1584	AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1585	if (frames_ctx->format != avctx->pix_fmt) {
1586	av_log(avctx, AV_LOG_ERROR,
1587	"Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");
1588	ret = AVERROR(EINVAL);
1589	goto free_and_end;
1590	}
1591	if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&
1592	avctx->sw_pix_fmt != frames_ctx->sw_format) {
1593	av_log(avctx, AV_LOG_ERROR,
1594	"Mismatching AVCodecContext.sw_pix_fmt (%s) "
1595	"and AVHWFramesContext.sw_format (%s)\n",
1596	av_get_pix_fmt_name(avctx->sw_pix_fmt),
1597	av_get_pix_fmt_name(frames_ctx->sw_format));
1598	ret = AVERROR(EINVAL);
1599	goto free_and_end;
1600	}
1601	avctx->sw_pix_fmt = frames_ctx->sw_format;
1602	}
1603	}
1604
1605	avctx->pts_correction_num_faulty_pts =
1606	avctx->pts_correction_num_faulty_dts = 0;
1607	avctx->pts_correction_last_pts =
1608	avctx->pts_correction_last_dts = INT64_MIN;
1609
1610	if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY
1611	&& avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO)
1612	av_log(avctx, AV_LOG_WARNING,
1613	"gray decoding requested but not enabled at configuration time\n");
1614
1615	if ( avctx->codec->init && (!(avctx->active_thread_type&FF_THREAD_FRAME)
1616	|| avctx->internal->frame_thread_encoder)) {
1617	ret = avctx->codec->init(avctx);
1618	if (ret < 0) {
1619	goto free_and_end;
1620	}
1621	}
1622
1623	ret=0;
1624
1625	#if FF_API_AUDIOENC_DELAY
1626	if (av_codec_is_encoder(avctx->codec))
1627	avctx->delay = avctx->initial_padding;
1628	#endif
1629
1630	if (av_codec_is_decoder(avctx->codec)) {
1631	if (!avctx->bit_rate)
1632	avctx->bit_rate = get_bit_rate(avctx);
1633	/* validate channel layout from the decoder */
1634	if (avctx->channel_layout) {
1635	int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1636	if (!avctx->channels)
1637	avctx->channels = channels;
1638	else if (channels != avctx->channels) {
1639	char buf[512];
1640	av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
1641	av_log(avctx, AV_LOG_WARNING,
1642	"Channel layout '%s' with %d channels does not match specified number of channels %d: "
1643	"ignoring specified channel layout\n",
1644	buf, channels, avctx->channels);
1645	avctx->channel_layout = 0;
1646	}
1647	}
1648	if (avctx->channels && avctx->channels < 0 ||
1649	avctx->channels > FF_SANE_NB_CHANNELS) {
1650	ret = AVERROR(EINVAL);
1651	goto free_and_end;
1652	}
1653	if (avctx->sub_charenc) {
1654	if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1655	av_log(avctx, AV_LOG_ERROR, "Character encoding is only "
1656	"supported with subtitles codecs\n");
1657	ret = AVERROR(EINVAL);
1658	goto free_and_end;
1659	} else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) {
1660	av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, "
1661	"subtitles character encoding will be ignored\n",
1662	avctx->codec_descriptor->name);
1663	avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING;
1664	} else {
1665	/* input character encoding is set for a text based subtitle
1666	* codec at this point */
1667	if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC)
1668	avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER;
1669
1670	if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) {
1671	#if CONFIG_ICONV
1672	iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc);
1673	if (cd == (iconv_t)-1) {
1674	ret = AVERROR(errno);
1675	av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context "
1676	"with input character encoding \"%s\"\n", avctx->sub_charenc);
1677	goto free_and_end;
1678	}
1679	iconv_close(cd);
1680	#else
1681	av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles "
1682	"conversion needs a libavcodec built with iconv support "
1683	"for this codec\n");
1684	ret = AVERROR(ENOSYS);
1685	goto free_and_end;
1686	#endif
1687	}
1688	}
1689	}
1690
1691	#if FF_API_AVCTX_TIMEBASE
1692	if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
1693	avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
1694	#endif
1695	}
1696	if (codec->priv_data_size > 0 && avctx->priv_data && codec->priv_class) {
1697	av_assert0(*(const AVClass **)avctx->priv_data == codec->priv_class);
1698	}
1699
1700	end:
1701	ff_unlock_avcodec(codec);
1702	if (options) {
1703	av_dict_free(options);
1704	*options = tmp;
1705	}
1706
1707	return ret;
1708	free_and_end:
1709	if (avctx->codec &&
1710	(avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP))
1711	avctx->codec->close(avctx);
1712
1713	if (codec->priv_class && codec->priv_data_size)
1714	av_opt_free(avctx->priv_data);
1715	av_opt_free(avctx);
1716
1717	#if FF_API_CODED_FRAME
1718	FF_DISABLE_DEPRECATION_WARNINGS
1719	av_frame_free(&avctx->coded_frame);
1720	FF_ENABLE_DEPRECATION_WARNINGS
1721	#endif
1722
1723	av_dict_free(&tmp);
1724	av_freep(&avctx->priv_data);
1725	if (avctx->internal) {
1726	av_frame_free(&avctx->internal->to_free);
1727	av_frame_free(&avctx->internal->buffer_frame);
1728	av_packet_free(&avctx->internal->buffer_pkt);
1729	av_freep(&avctx->internal->pool);
1730	}
1731	av_freep(&avctx->internal);
1732	avctx->codec = NULL;
1733	goto end;
1734	}
1735
1736	int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
1737	{
1738	if (avpkt->size < 0) {
1739	av_log(avctx, AV_LOG_ERROR, "Invalid negative user packet size %d\n", avpkt->size);
1740	return AVERROR(EINVAL);
1741	}
1742	if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
1743	av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
1744	size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
1745	return AVERROR(EINVAL);
1746	}
1747
1748	if (avctx && 2*min_size < size) { // FIXME The factor needs to be finetuned
1749	av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
1750	if (!avpkt->data || avpkt->size < size) {
1751	av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
1752	avpkt->data = avctx->internal->byte_buffer;
1753	avpkt->size = avctx->internal->byte_buffer_size;
1754	}
1755	}
1756
1757	if (avpkt->data) {
1758	AVBufferRef *buf = avpkt->buf;
1759
1760	if (avpkt->size < size) {
1761	av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %"PRId64")\n", avpkt->size, size);
1762	return AVERROR(EINVAL);
1763	}
1764
1765	av_init_packet(avpkt);
1766	avpkt->buf = buf;
1767	avpkt->size = size;
1768	return 0;
1769	} else {
1770	int ret = av_new_packet(avpkt, size);
1771	if (ret < 0)
1772	av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
1773	return ret;
1774	}
1775	}
1776
1777	int ff_alloc_packet(AVPacket *avpkt, int size)
1778	{
1779	return ff_alloc_packet2(NULL, avpkt, size, 0);
1780	}
1781
1782	/**
1783	* Pad last frame with silence.
1784	*/
1785	static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1786	{
1787	AVFrame *frame = NULL;
1788	int ret;
1789
1790	if (!(frame = av_frame_alloc()))
1791	return AVERROR(ENOMEM);
1792
1793	frame->format = src->format;
1794	frame->channel_layout = src->channel_layout;
1795	av_frame_set_channels(frame, av_frame_get_channels(src));
1796	frame->nb_samples = s->frame_size;
1797	ret = av_frame_get_buffer(frame, 32);
1798	if (ret < 0)
1799	goto fail;
1800
1801	ret = av_frame_copy_props(frame, src);
1802	if (ret < 0)
1803	goto fail;
1804
1805	if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1806	src->nb_samples, s->channels, s->sample_fmt)) < 0)
1807	goto fail;
1808	if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1809	frame->nb_samples - src->nb_samples,
1810	s->channels, s->sample_fmt)) < 0)
1811	goto fail;
1812
1813	*dst = frame;
1814
1815	return 0;
1816
1817	fail:
1818	av_frame_free(&frame);
1819	return ret;
1820	}
1821
1822	int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
1823	AVPacket *avpkt,
1824	const AVFrame *frame,
1825	int *got_packet_ptr)
1826	{
1827	AVFrame *extended_frame = NULL;
1828	AVFrame *padded_frame = NULL;
1829	int ret;
1830	AVPacket user_pkt = *avpkt;
1831	int needs_realloc = !user_pkt.data;
1832
1833	*got_packet_ptr = 0;
1834
1835	if (!avctx->codec->encode2) {
1836	av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
1837	return AVERROR(ENOSYS);
1838	}
1839
1840	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
1841	av_packet_unref(avpkt);
1842	av_init_packet(avpkt);
1843	return 0;
1844	}
1845
1846	/* ensure that extended_data is properly set */
1847	if (frame && !frame->extended_data) {
1848	if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1849	avctx->channels > AV_NUM_DATA_POINTERS) {
1850	av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1851	"with more than %d channels, but extended_data is not set.\n",
1852	AV_NUM_DATA_POINTERS);
1853	return AVERROR(EINVAL);
1854	}
1855	av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1856
1857	extended_frame = av_frame_alloc();
1858	if (!extended_frame)
1859	return AVERROR(ENOMEM);
1860
1861	memcpy(extended_frame, frame, sizeof(AVFrame));
1862	extended_frame->extended_data = extended_frame->data;
1863	frame = extended_frame;
1864	}
1865
1866	/* extract audio service type metadata */
1867	if (frame) {
1868	AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
1869	if (sd && sd->size >= sizeof(enum AVAudioServiceType))
1870	avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
1871	}
1872
1873	/* check for valid frame size */
1874	if (frame) {
1875	if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
1876	if (frame->nb_samples > avctx->frame_size) {
1877	av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
1878	ret = AVERROR(EINVAL);
1879	goto end;
1880	}
1881	} else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1882	if (frame->nb_samples < avctx->frame_size &&
1883	!avctx->internal->last_audio_frame) {
1884	ret = pad_last_frame(avctx, &padded_frame, frame);
1885	if (ret < 0)
1886	goto end;
1887
1888	frame = padded_frame;
1889	avctx->internal->last_audio_frame = 1;
1890	}
1891
1892	if (frame->nb_samples != avctx->frame_size) {
1893	av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
1894	ret = AVERROR(EINVAL);
1895	goto end;
1896	}
1897	}
1898	}
1899
1900	av_assert0(avctx->codec->encode2);
1901
1902	ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1903	if (!ret) {
1904	if (*got_packet_ptr) {
1905	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
1906	if (avpkt->pts == AV_NOPTS_VALUE)
1907	avpkt->pts = frame->pts;
1908	if (!avpkt->duration)
1909	avpkt->duration = ff_samples_to_time_base(avctx,
1910	frame->nb_samples);
1911	}
1912	avpkt->dts = avpkt->pts;
1913	} else {
1914	avpkt->size = 0;
1915	}
1916	}
1917	if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
1918	needs_realloc = 0;
1919	if (user_pkt.data) {
1920	if (user_pkt.size >= avpkt->size) {
1921	memcpy(user_pkt.data, avpkt->data, avpkt->size);
1922	} else {
1923	av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
1924	avpkt->size = user_pkt.size;
1925	ret = -1;
1926	}
1927	avpkt->buf = user_pkt.buf;
1928	avpkt->data = user_pkt.data;
1929	} else {
1930	if (av_dup_packet(avpkt) < 0) {
1931	ret = AVERROR(ENOMEM);
1932	}
1933	}
1934	}
1935
1936	if (!ret) {
1937	if (needs_realloc && avpkt->data) {
1938	ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
1939	if (ret >= 0)
1940	avpkt->data = avpkt->buf->data;
1941	}
1942
1943	avctx->frame_number++;
1944	}
1945
1946	if (ret < 0 || !*got_packet_ptr) {
1947	av_packet_unref(avpkt);
1948	av_init_packet(avpkt);
1949	goto end;
1950	}
1951
1952	/* NOTE: if we add any audio encoders which output non-keyframe packets,
1953	* this needs to be moved to the encoders, but for now we can do it
1954	* here to simplify things */
1955	avpkt->flags |= AV_PKT_FLAG_KEY;
1956
1957	end:
1958	av_frame_free(&padded_frame);
1959	av_free(extended_frame);
1960
1961	#if FF_API_AUDIOENC_DELAY
1962	avctx->delay = avctx->initial_padding;
1963	#endif
1964
1965	return ret;
1966	}
1967
1968	int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
1969	AVPacket *avpkt,
1970	const AVFrame *frame,
1971	int *got_packet_ptr)
1972	{
1973	int ret;
1974	AVPacket user_pkt = *avpkt;
1975	int needs_realloc = !user_pkt.data;
1976
1977	*got_packet_ptr = 0;
1978
1979	if (!avctx->codec->encode2) {
1980	av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
1981	return AVERROR(ENOSYS);
1982	}
1983
1984	if(CONFIG_FRAME_THREAD_ENCODER &&
1985	avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))
1986	return ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
1987
1988	if ((avctx->flags&AV_CODEC_FLAG_PASS1) && avctx->stats_out)
1989	avctx->stats_out[0] = '\0';
1990
1991	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
1992	av_packet_unref(avpkt);
1993	av_init_packet(avpkt);
1994	avpkt->size = 0;
1995	return 0;
1996	}
1997
1998	if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
1999	return AVERROR(EINVAL);
2000
2001	if (frame && frame->format == AV_PIX_FMT_NONE)
2002	av_log(avctx, AV_LOG_WARNING, "AVFrame.format is not set\n");
2003	if (frame && (frame->width == 0 || frame->height == 0))
2004	av_log(avctx, AV_LOG_WARNING, "AVFrame.width or height is not set\n");
2005
2006	av_assert0(avctx->codec->encode2);
2007
2008	ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
2009	av_assert0(ret <= 0);
2010
2011	emms_c();
2012
2013	if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
2014	needs_realloc = 0;
2015	if (user_pkt.data) {
2016	if (user_pkt.size >= avpkt->size) {
2017	memcpy(user_pkt.data, avpkt->data, avpkt->size);
2018	} else {
2019	av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
2020	avpkt->size = user_pkt.size;
2021	ret = -1;
2022	}
2023	avpkt->buf = user_pkt.buf;
2024	avpkt->data = user_pkt.data;
2025	} else {
2026	if (av_dup_packet(avpkt) < 0) {
2027	ret = AVERROR(ENOMEM);
2028	}
2029	}
2030	}
2031
2032	if (!ret) {
2033	if (!*got_packet_ptr)
2034	avpkt->size = 0;
2035	else if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
2036	avpkt->pts = avpkt->dts = frame->pts;
2037
2038	if (needs_realloc && avpkt->data) {
2039	ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
2040	if (ret >= 0)
2041	avpkt->data = avpkt->buf->data;
2042	}
2043
2044	avctx->frame_number++;
2045	}
2046
2047	if (ret < 0 || !*got_packet_ptr)
2048	av_packet_unref(avpkt);
2049
2050	return ret;
2051	}
2052
2053	int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2054	const AVSubtitle *sub)
2055	{
2056	int ret;
2057	if (sub->start_display_time) {
2058	av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
2059	return -1;
2060	}
2061
2062	ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
2063	avctx->frame_number++;
2064	return ret;
2065	}
2066
2067	/**
2068	* Attempt to guess proper monotonic timestamps for decoded video frames
2069	* which might have incorrect times. Input timestamps may wrap around, in
2070	* which case the output will as well.
2071	*
2072	* @param pts the pts field of the decoded AVPacket, as passed through
2073	* AVFrame.pts
2074	* @param dts the dts field of the decoded AVPacket
2075	* @return one of the input values, may be AV_NOPTS_VALUE
2076	*/
2077	static int64_t guess_correct_pts(AVCodecContext *ctx,
2078	int64_t reordered_pts, int64_t dts)
2079	{
2080	int64_t pts = AV_NOPTS_VALUE;
2081
2082	if (dts != AV_NOPTS_VALUE) {
2083	ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
2084	ctx->pts_correction_last_dts = dts;
2085	} else if (reordered_pts != AV_NOPTS_VALUE)
2086	ctx->pts_correction_last_dts = reordered_pts;
2087
2088	if (reordered_pts != AV_NOPTS_VALUE) {
2089	ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
2090	ctx->pts_correction_last_pts = reordered_pts;
2091	} else if(dts != AV_NOPTS_VALUE)
2092	ctx->pts_correction_last_pts = dts;
2093
2094	if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
2095	&& reordered_pts != AV_NOPTS_VALUE)
2096	pts = reordered_pts;
2097	else
2098	pts = dts;
2099
2100	return pts;
2101	}
2102
2103	static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
2104	{
2105	int size = 0, ret;
2106	const uint8_t *data;
2107	uint32_t flags;
2108	int64_t val;
2109
2110	data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
2111	if (!data)
2112	return 0;
2113
2114	if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
2115	av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
2116	"changes, but PARAM_CHANGE side data was sent to it.\n");
2117	ret = AVERROR(EINVAL);
2118	goto fail2;
2119	}
2120
2121	if (size < 4)
2122	goto fail;
2123
2124	flags = bytestream_get_le32(&data);
2125	size -= 4;
2126
2127	if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
2128	if (size < 4)
2129	goto fail;
2130	val = bytestream_get_le32(&data);
2131	if (val <= 0 || val > INT_MAX) {
2132	av_log(avctx, AV_LOG_ERROR, "Invalid channel count");
2133	ret = AVERROR_INVALIDDATA;
2134	goto fail2;
2135	}
2136	avctx->channels = val;
2137	size -= 4;
2138	}
2139	if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
2140	if (size < 8)
2141	goto fail;
2142	avctx->channel_layout = bytestream_get_le64(&data);
2143	size -= 8;
2144	}
2145	if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
2146	if (size < 4)
2147	goto fail;
2148	val = bytestream_get_le32(&data);
2149	if (val <= 0 || val > INT_MAX) {
2150	av_log(avctx, AV_LOG_ERROR, "Invalid sample rate");
2151	ret = AVERROR_INVALIDDATA;
2152	goto fail2;
2153	}
2154	avctx->sample_rate = val;
2155	size -= 4;
2156	}
2157	if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
2158	if (size < 8)
2159	goto fail;
2160	avctx->width = bytestream_get_le32(&data);
2161	avctx->height = bytestream_get_le32(&data);
2162	size -= 8;
2163	ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
2164	if (ret < 0)
2165	goto fail2;
2166	}
2167
2168	return 0;
2169	fail:
2170	av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
2171	ret = AVERROR_INVALIDDATA;
2172	fail2:
2173	if (ret < 0) {
2174	av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
2175	if (avctx->err_recognition & AV_EF_EXPLODE)
2176	return ret;
2177	}
2178	return 0;
2179	}
2180
2181	static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
2182	{
2183	int ret;
2184
2185	/* move the original frame to our backup */
2186	av_frame_unref(avci->to_free);
2187	av_frame_move_ref(avci->to_free, frame);
2188
2189	/* now copy everything except the AVBufferRefs back
2190	* note that we make a COPY of the side data, so calling av_frame_free() on
2191	* the caller's frame will work properly */
2192	ret = av_frame_copy_props(frame, avci->to_free);
2193	if (ret < 0)
2194	return ret;
2195
2196	memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
2197	memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
2198	if (avci->to_free->extended_data != avci->to_free->data) {
2199	int planes = av_frame_get_channels(avci->to_free);
2200	int size = planes * sizeof(*frame->extended_data);
2201
2202	if (!size) {
2203	av_frame_unref(frame);
2204	return AVERROR_BUG;
2205	}
2206
2207	frame->extended_data = av_malloc(size);
2208	if (!frame->extended_data) {
2209	av_frame_unref(frame);
2210	return AVERROR(ENOMEM);
2211	}
2212	memcpy(frame->extended_data, avci->to_free->extended_data,
2213	size);
2214	} else
2215	frame->extended_data = frame->data;
2216
2217	frame->format = avci->to_free->format;
2218	frame->width = avci->to_free->width;
2219	frame->height = avci->to_free->height;
2220	frame->channel_layout = avci->to_free->channel_layout;
2221	frame->nb_samples = avci->to_free->nb_samples;
2222	av_frame_set_channels(frame, av_frame_get_channels(avci->to_free));
2223
2224	return 0;
2225	}
2226
2227	int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
2228	int *got_picture_ptr,
2229	const AVPacket *avpkt)
2230	{
2231	AVCodecInternal *avci = avctx->internal;
2232	int ret;
2233	// copy to ensure we do not change avpkt
2234	AVPacket tmp = *avpkt;
2235
2236	if (!avctx->codec)
2237	return AVERROR(EINVAL);
2238	if (avctx->codec->type != AVMEDIA_TYPE_VIDEO) {
2239	av_log(avctx, AV_LOG_ERROR, "Invalid media type for video\n");
2240	return AVERROR(EINVAL);
2241	}
2242
2243	if (!avctx->codec->decode) {
2244	av_log(avctx, AV_LOG_ERROR, "This decoder requires using the avcodec_send_packet() API.\n");
2245	return AVERROR(ENOSYS);
2246	}
2247
2248	*got_picture_ptr = 0;
2249	if ((avctx->coded_width || avctx->coded_height) && av_image_check_size2(avctx->coded_width, avctx->coded_height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
2250	return AVERROR(EINVAL);
2251
2252	avctx->internal->pkt = avpkt;
2253	ret = apply_param_change(avctx, avpkt);
2254	if (ret < 0)
2255	return ret;
2256
2257	av_frame_unref(picture);
2258
2259	if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size ||
2260	(avctx->active_thread_type & FF_THREAD_FRAME)) {
2261	#if FF_API_MERGE_SD
2262	FF_DISABLE_DEPRECATION_WARNINGS
2263	int did_split = av_packet_split_side_data(&tmp);
2264	FF_ENABLE_DEPRECATION_WARNINGS
2265	#endif
2266	ret = apply_param_change(avctx, &tmp);
2267	if (ret < 0)
2268	goto fail;
2269
2270	avctx->internal->pkt = &tmp;
2271	if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
2272	ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
2273	&tmp);
2274	else {
2275	ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
2276	&tmp);
2277	if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS))
2278	picture->pkt_dts = avpkt->dts;
2279
2280	if(!avctx->has_b_frames){
2281	av_frame_set_pkt_pos(picture, avpkt->pos);
2282	}
2283	//FIXME these should be under if(!avctx->has_b_frames)
2284	/* get_buffer is supposed to set frame parameters */
2285	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
2286	if (!picture->sample_aspect_ratio.num) picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
2287	if (!picture->width) picture->width = avctx->width;
2288	if (!picture->height) picture->height = avctx->height;
2289	if (picture->format == AV_PIX_FMT_NONE) picture->format = avctx->pix_fmt;
2290	}
2291	}
2292
2293	fail:
2294	emms_c(); //needed to avoid an emms_c() call before every return;
2295
2296	avctx->internal->pkt = NULL;
2297	#if FF_API_MERGE_SD
2298	if (did_split) {
2299	av_packet_free_side_data(&tmp);
2300	if(ret == tmp.size)
2301	ret = avpkt->size;
2302	}
2303	#endif
2304	if (picture->flags & AV_FRAME_FLAG_DISCARD) {
2305	*got_picture_ptr = 0;
2306	}
2307	if (*got_picture_ptr) {
2308	if (!avctx->refcounted_frames) {
2309	int err = unrefcount_frame(avci, picture);
2310	if (err < 0)
2311	return err;
2312	}
2313
2314	avctx->frame_number++;
2315	av_frame_set_best_effort_timestamp(picture,
2316	guess_correct_pts(avctx,
2317	picture->pts,
2318	picture->pkt_dts));
2319	} else
2320	av_frame_unref(picture);
2321	} else
2322	ret = 0;
2323
2324	/* many decoders assign whole AVFrames, thus overwriting extended_data;
2325	* make sure it's set correctly */
2326	av_assert0(!picture->extended_data || picture->extended_data == picture->data);
2327
2328	#if FF_API_AVCTX_TIMEBASE
2329	if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
2330	avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
2331	#endif
2332
2333	return ret;
2334	}
2335
2336	int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
2337	AVFrame *frame,
2338	int *got_frame_ptr,
2339	const AVPacket *avpkt)
2340	{
2341	AVCodecInternal *avci = avctx->internal;
2342	int ret = 0;
2343
2344	*got_frame_ptr = 0;
2345
2346	if (!avctx->codec)
2347	return AVERROR(EINVAL);
2348
2349	if (!avctx->codec->decode) {
2350	av_log(avctx, AV_LOG_ERROR, "This decoder requires using the avcodec_send_packet() API.\n");
2351	return AVERROR(ENOSYS);
2352	}
2353
2354	if (!avpkt->data && avpkt->size) {
2355	av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
2356	return AVERROR(EINVAL);
2357	}
2358	if (avctx->codec->type != AVMEDIA_TYPE_AUDIO) {
2359	av_log(avctx, AV_LOG_ERROR, "Invalid media type for audio\n");
2360	return AVERROR(EINVAL);
2361	}
2362
2363	av_frame_unref(frame);
2364
2365	if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
2366	uint8_t *side;
2367	int side_size;
2368	uint32_t discard_padding = 0;
2369	uint8_t skip_reason = 0;
2370	uint8_t discard_reason = 0;
2371	// copy to ensure we do not change avpkt
2372	AVPacket tmp = *avpkt;
2373	#if FF_API_MERGE_SD
2374	FF_DISABLE_DEPRECATION_WARNINGS
2375	int did_split = av_packet_split_side_data(&tmp);
2376	FF_ENABLE_DEPRECATION_WARNINGS
2377	#endif
2378	ret = apply_param_change(avctx, &tmp);
2379	if (ret < 0)
2380	goto fail;
2381
2382	avctx->internal->pkt = &tmp;
2383	if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
2384	ret = ff_thread_decode_frame(avctx, frame, got_frame_ptr, &tmp);
2385	else {
2386	ret = avctx->codec->decode(avctx, frame, got_frame_ptr, &tmp);
2387	av_assert0(ret <= tmp.size);
2388	frame->pkt_dts = avpkt->dts;
2389	}
2390	if (ret >= 0 && *got_frame_ptr) {
2391	avctx->frame_number++;
2392	av_frame_set_best_effort_timestamp(frame,
2393	guess_correct_pts(avctx,
2394	frame->pts,
2395	frame->pkt_dts));
2396	if (frame->format == AV_SAMPLE_FMT_NONE)
2397	frame->format = avctx->sample_fmt;
2398	if (!frame->channel_layout)
2399	frame->channel_layout = avctx->channel_layout;
2400	if (!av_frame_get_channels(frame))
2401	av_frame_set_channels(frame, avctx->channels);
2402	if (!frame->sample_rate)
2403	frame->sample_rate = avctx->sample_rate;
2404	}
2405
2406	side= av_packet_get_side_data(avctx->internal->pkt, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
2407	if(side && side_size>=10) {
2408	avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier;
2409	discard_padding = AV_RL32(side + 4);
2410	av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
2411	avctx->internal->skip_samples, (int)discard_padding);
2412	skip_reason = AV_RL8(side + 8);
2413	discard_reason = AV_RL8(side + 9);
2414	}
2415
2416	if ((frame->flags & AV_FRAME_FLAG_DISCARD) && *got_frame_ptr &&
2417	!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
2418	avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples);
2419	*got_frame_ptr = 0;
2420	}
2421
2422	if (avctx->internal->skip_samples > 0 && *got_frame_ptr &&
2423	!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
2424	if(frame->nb_samples <= avctx->internal->skip_samples){
2425	*got_frame_ptr = 0;
2426	avctx->internal->skip_samples -= frame->nb_samples;
2427	av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
2428	avctx->internal->skip_samples);
2429	} else {
2430	av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples,
2431	frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
2432	if(avctx->pkt_timebase.num && avctx->sample_rate) {
2433	int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
2434	(AVRational){1, avctx->sample_rate},
2435	avctx->pkt_timebase);
2436	if(frame->pts!=AV_NOPTS_VALUE)
2437	frame->pts += diff_ts;
2438	#if FF_API_PKT_PTS
2439	FF_DISABLE_DEPRECATION_WARNINGS
2440	if(frame->pkt_pts!=AV_NOPTS_VALUE)
2441	frame->pkt_pts += diff_ts;
2442	FF_ENABLE_DEPRECATION_WARNINGS
2443	#endif
2444	if(frame->pkt_dts!=AV_NOPTS_VALUE)
2445	frame->pkt_dts += diff_ts;
2446	if (av_frame_get_pkt_duration(frame) >= diff_ts)
2447	av_frame_set_pkt_duration(frame, av_frame_get_pkt_duration(frame) - diff_ts);
2448	} else {
2449	av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
2450	}
2451	av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
2452	avctx->internal->skip_samples, frame->nb_samples);
2453	frame->nb_samples -= avctx->internal->skip_samples;
2454	avctx->internal->skip_samples = 0;
2455	}
2456	}
2457
2458	if (discard_padding > 0 && discard_padding <= frame->nb_samples && *got_frame_ptr &&
2459	!(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
2460	if (discard_padding == frame->nb_samples) {
2461	*got_frame_ptr = 0;
2462	} else {
2463	if(avctx->pkt_timebase.num && avctx->sample_rate) {
2464	int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
2465	(AVRational){1, avctx->sample_rate},
2466	avctx->pkt_timebase);
2467	av_frame_set_pkt_duration(frame, diff_ts);
2468	} else {
2469	av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
2470	}
2471	av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
2472	(int)discard_padding, frame->nb_samples);
2473	frame->nb_samples -= discard_padding;
2474	}
2475	}
2476
2477	if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && *got_frame_ptr) {
2478	AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10);
2479	if (fside) {
2480	AV_WL32(fside->data, avctx->internal->skip_samples);
2481	AV_WL32(fside->data + 4, discard_padding);
2482	AV_WL8(fside->data + 8, skip_reason);
2483	AV_WL8(fside->data + 9, discard_reason);
2484	avctx->internal->skip_samples = 0;
2485	}
2486	}
2487	fail:
2488	avctx->internal->pkt = NULL;
2489	#if FF_API_MERGE_SD
2490	if (did_split) {
2491	av_packet_free_side_data(&tmp);
2492	if(ret == tmp.size)
2493	ret = avpkt->size;
2494	}
2495	#endif
2496
2497	if (ret >= 0 && *got_frame_ptr) {
2498	if (!avctx->refcounted_frames) {
2499	int err = unrefcount_frame(avci, frame);
2500	if (err < 0)
2501	return err;
2502	}
2503	} else
2504	av_frame_unref(frame);
2505	}
2506
2507	av_assert0(ret <= avpkt->size);
2508
2509	if (!avci->showed_multi_packet_warning &&
2510	ret >= 0 && ret != avpkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
2511	av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
2512	avci->showed_multi_packet_warning = 1;
2513	}
2514
2515	return ret;
2516	}
2517
2518	#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
2519	static int recode_subtitle(AVCodecContext *avctx,
2520	AVPacket *outpkt, const AVPacket *inpkt)
2521	{
2522	#if CONFIG_ICONV
2523	iconv_t cd = (iconv_t)-1;
2524	int ret = 0;
2525	char *inb, *outb;
2526	size_t inl, outl;
2527	AVPacket tmp;
2528	#endif
2529
2530	if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0)
2531	return 0;
2532
2533	#if CONFIG_ICONV
2534	cd = iconv_open("UTF-8", avctx->sub_charenc);
2535	av_assert0(cd != (iconv_t)-1);
2536
2537	inb = inpkt->data;
2538	inl = inpkt->size;
2539
2540	if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
2541	av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
2542	ret = AVERROR(ENOMEM);
2543	goto end;
2544	}
2545
2546	ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
2547	if (ret < 0)
2548	goto end;
2549	outpkt->buf = tmp.buf;
2550	outpkt->data = tmp.data;
2551	outpkt->size = tmp.size;
2552	outb = outpkt->data;
2553	outl = outpkt->size;
2554
2555	if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
2556	iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
2557	outl >= outpkt->size || inl != 0) {
2558	ret = FFMIN(AVERROR(errno), -1);
2559	av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
2560	"from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
2561	av_packet_unref(&tmp);
2562	goto end;
2563	}
2564	outpkt->size -= outl;
2565	memset(outpkt->data + outpkt->size, 0, outl);
2566
2567	end:
2568	if (cd != (iconv_t)-1)
2569	iconv_close(cd);
2570	return ret;
2571	#else
2572	av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
2573	return AVERROR(EINVAL);
2574	#endif
2575	}
2576
2577	static int utf8_check(const uint8_t *str)
2578	{
2579	const uint8_t *byte;
2580	uint32_t codepoint, min;
2581
2582	while (*str) {
2583	byte = str;
2584	GET_UTF8(codepoint, *(byte++), return 0;);
2585	min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 :
2586	1 << (5 * (byte - str) - 4);
2587	if (codepoint < min || codepoint >= 0x110000 ||
2588	codepoint == 0xFFFE /* BOM */ ||
2589	codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */)
2590	return 0;
2591	str = byte;
2592	}
2593	return 1;
2594	}
2595
2596	#if FF_API_ASS_TIMING
2597	static void insert_ts(AVBPrint *buf, int ts)
2598	{
2599	if (ts == -1) {
2600	av_bprintf(buf, "9:59:59.99,");
2601	} else {
2602	int h, m, s;
2603
2604	h = ts/360000; ts -= 360000*h;
2605	m = ts/ 6000; ts -= 6000*m;
2606	s = ts/ 100; ts -= 100*s;
2607	av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
2608	}
2609	}
2610
2611	static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
2612	{
2613	int i;
2614	AVBPrint buf;
2615
2616	av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
2617
2618	for (i = 0; i < sub->num_rects; i++) {
2619	char *final_dialog;
2620	const char *dialog;
2621	AVSubtitleRect *rect = sub->rects[i];
2622	int ts_start, ts_duration = -1;
2623	long int layer;
2624
2625	if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
2626	continue;
2627
2628	av_bprint_clear(&buf);
2629
2630	/* skip ReadOrder */
2631	dialog = strchr(rect->ass, ',');
2632	if (!dialog)
2633	continue;
2634	dialog++;
2635
2636	/* extract Layer or Marked */
2637	layer = strtol(dialog, (char**)&dialog, 10);
2638	if (*dialog != ',')
2639	continue;
2640	dialog++;
2641
2642	/* rescale timing to ASS time base (ms) */
2643	ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100));
2644	if (pkt->duration != -1)
2645	ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100));
2646	sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration);
2647
2648	/* construct ASS (standalone file form with timestamps) string */
2649	av_bprintf(&buf, "Dialogue: %ld,", layer);
2650	insert_ts(&buf, ts_start);
2651	insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration);
2652	av_bprintf(&buf, "%s\r\n", dialog);
2653
2654	final_dialog = av_strdup(buf.str);
2655	if (!av_bprint_is_complete(&buf) || !final_dialog) {
2656	av_freep(&final_dialog);
2657	av_bprint_finalize(&buf, NULL);
2658	return AVERROR(ENOMEM);
2659	}
2660	av_freep(&rect->ass);
2661	rect->ass = final_dialog;
2662	}
2663
2664	av_bprint_finalize(&buf, NULL);
2665	return 0;
2666	}
2667	#endif
2668
2669	int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
2670	int *got_sub_ptr,
2671	AVPacket *avpkt)
2672	{
2673	int i, ret = 0;
2674
2675	if (!avpkt->data && avpkt->size) {
2676	av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
2677	return AVERROR(EINVAL);
2678	}
2679	if (!avctx->codec)
2680	return AVERROR(EINVAL);
2681	if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
2682	av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
2683	return AVERROR(EINVAL);
2684	}
2685
2686	*got_sub_ptr = 0;
2687	get_subtitle_defaults(sub);
2688
2689	if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
2690	AVPacket pkt_recoded;
2691	AVPacket tmp = *avpkt;
2692	#if FF_API_MERGE_SD
2693	FF_DISABLE_DEPRECATION_WARNINGS
2694	int did_split = av_packet_split_side_data(&tmp);
2695	//apply_param_change(avctx, &tmp);
2696
2697	if (did_split) {
2698	/* FFMIN() prevents overflow in case the packet wasn't allocated with
2699	* proper padding.
2700	* If the side data is smaller than the buffer padding size, the
2701	* remaining bytes should have already been filled with zeros by the
2702	* original packet allocation anyway. */
2703	memset(tmp.data + tmp.size, 0,
2704	FFMIN(avpkt->size - tmp.size, AV_INPUT_BUFFER_PADDING_SIZE));
2705	}
2706	FF_ENABLE_DEPRECATION_WARNINGS
2707	#endif
2708
2709	pkt_recoded = tmp;
2710	ret = recode_subtitle(avctx, &pkt_recoded, &tmp);
2711	if (ret < 0) {
2712	*got_sub_ptr = 0;
2713	} else {
2714	avctx->internal->pkt = &pkt_recoded;
2715
2716	if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
2717	sub->pts = av_rescale_q(avpkt->pts,
2718	avctx->pkt_timebase, AV_TIME_BASE_Q);
2719	ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
2720	av_assert1((ret >= 0) >= !!*got_sub_ptr &&
2721	!!*got_sub_ptr >= !!sub->num_rects);
2722
2723	#if FF_API_ASS_TIMING
2724	if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
2725	&& *got_sub_ptr && sub->num_rects) {
2726	const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
2727	: avctx->time_base;
2728	int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
2729	if (err < 0)
2730	ret = err;
2731	}
2732	#endif
2733
2734	if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
2735	avctx->pkt_timebase.num) {
2736	AVRational ms = { 1, 1000 };
2737	sub->end_display_time = av_rescale_q(avpkt->duration,
2738	avctx->pkt_timebase, ms);
2739	}
2740
2741	if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB)
2742	sub->format = 0;
2743	else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
2744	sub->format = 1;
2745
2746	for (i = 0; i < sub->num_rects; i++) {
2747	if (sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
2748	av_log(avctx, AV_LOG_ERROR,
2749	"Invalid UTF-8 in decoded subtitles text; "
2750	"maybe missing -sub_charenc option\n");
2751	avsubtitle_free(sub);
2752	ret = AVERROR_INVALIDDATA;
2753	break;
2754	}
2755	}
2756
2757	if (tmp.data != pkt_recoded.data) { // did we recode?
2758	/* prevent from destroying side data from original packet */
2759	pkt_recoded.side_data = NULL;
2760	pkt_recoded.side_data_elems = 0;
2761
2762	av_packet_unref(&pkt_recoded);
2763	}
2764	avctx->internal->pkt = NULL;
2765	}
2766
2767	#if FF_API_MERGE_SD
2768	if (did_split) {
2769	av_packet_free_side_data(&tmp);
2770	if(ret == tmp.size)
2771	ret = avpkt->size;
2772	}
2773	#endif
2774
2775	if (*got_sub_ptr)
2776	avctx->frame_number++;
2777	}
2778
2779	return ret;
2780	}
2781
2782	void avsubtitle_free(AVSubtitle *sub)
2783	{
2784	int i;
2785
2786	for (i = 0; i < sub->num_rects; i++) {
2787	av_freep(&sub->rects[i]->data[0]);
2788	av_freep(&sub->rects[i]->data[1]);
2789	av_freep(&sub->rects[i]->data[2]);
2790	av_freep(&sub->rects[i]->data[3]);
2791	av_freep(&sub->rects[i]->text);
2792	av_freep(&sub->rects[i]->ass);
2793	av_freep(&sub->rects[i]);
2794	}
2795
2796	av_freep(&sub->rects);
2797
2798	memset(sub, 0, sizeof(AVSubtitle));
2799	}
2800
2801	static int do_decode(AVCodecContext *avctx, AVPacket *pkt)
2802	{
2803	int got_frame = 0;
2804	int ret;
2805
2806	av_assert0(!avctx->internal->buffer_frame->buf[0]);
2807
2808	if (!pkt)
2809	pkt = avctx->internal->buffer_pkt;
2810
2811	// This is the lesser evil. The field is for compatibility with legacy users
2812	// of the legacy API, and users using the new API should not be forced to
2813	// even know about this field.
2814	avctx->refcounted_frames = 1;
2815
2816	// Some codecs (at least wma lossless) will crash when feeding drain packets
2817	// after EOF was signaled.
2818	if (avctx->internal->draining_done)
2819	return AVERROR_EOF;
2820
2821	if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
2822	ret = avcodec_decode_video2(avctx, avctx->internal->buffer_frame,
2823	&got_frame, pkt);
2824	if (ret >= 0 && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
2825	ret = pkt->size;
2826	} else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2827	ret = avcodec_decode_audio4(avctx, avctx->internal->buffer_frame,
2828	&got_frame, pkt);
2829	} else {
2830	ret = AVERROR(EINVAL);
2831	}
2832
2833	if (ret == AVERROR(EAGAIN))
2834	ret = pkt->size;
2835
2836	if (avctx->internal->draining && !got_frame)
2837	avctx->internal->draining_done = 1;
2838
2839	if (ret < 0)
2840	return ret;
2841
2842	if (ret >= pkt->size) {
2843	av_packet_unref(avctx->internal->buffer_pkt);
2844	} else {
2845	int consumed = ret;
2846
2847	if (pkt != avctx->internal->buffer_pkt) {
2848	av_packet_unref(avctx->internal->buffer_pkt);
2849	if ((ret = av_packet_ref(avctx->internal->buffer_pkt, pkt)) < 0)
2850	return ret;
2851	}
2852
2853	avctx->internal->buffer_pkt->data += consumed;
2854	avctx->internal->buffer_pkt->size -= consumed;
2855	avctx->internal->buffer_pkt->pts = AV_NOPTS_VALUE;
2856	avctx->internal->buffer_pkt->dts = AV_NOPTS_VALUE;
2857	}
2858
2859	if (got_frame)
2860	av_assert0(avctx->internal->buffer_frame->buf[0]);
2861
2862	return 0;
2863	}
2864
2865	int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
2866	{
2867	int ret;
2868
2869	if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
2870	return AVERROR(EINVAL);
2871
2872	if (avctx->internal->draining)
2873	return AVERROR_EOF;
2874
2875	if (avpkt && !avpkt->size && avpkt->data)
2876	return AVERROR(EINVAL);
2877
2878	if (!avpkt || !avpkt->size) {
2879	avctx->internal->draining = 1;
2880	avpkt = NULL;
2881
2882	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
2883	return 0;
2884	}
2885
2886	if (avctx->codec->send_packet) {
2887	if (avpkt) {
2888	AVPacket tmp = *avpkt;
2889	#if FF_API_MERGE_SD
2890	FF_DISABLE_DEPRECATION_WARNINGS
2891	int did_split = av_packet_split_side_data(&tmp);
2892	FF_ENABLE_DEPRECATION_WARNINGS
2893	#endif
2894	ret = apply_param_change(avctx, &tmp);
2895	if (ret >= 0)
2896	ret = avctx->codec->send_packet(avctx, &tmp);
2897	#if FF_API_MERGE_SD
2898	if (did_split)
2899	av_packet_free_side_data(&tmp);
2900	#endif
2901	return ret;
2902	} else {
2903	return avctx->codec->send_packet(avctx, NULL);
2904	}
2905	}
2906
2907	// Emulation via old API. Assume avpkt is likely not refcounted, while
2908	// decoder output is always refcounted, and avoid copying.
2909
2910	if (avctx->internal->buffer_pkt->size || avctx->internal->buffer_frame->buf[0])
2911	return AVERROR(EAGAIN);
2912
2913	// The goal is decoding the first frame of the packet without using memcpy,
2914	// because the common case is having only 1 frame per packet (especially
2915	// with video, but audio too). In other cases, it can't be avoided, unless
2916	// the user is feeding refcounted packets.
2917	return do_decode(avctx, (AVPacket *)avpkt);
2918	}
2919
2920	int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
2921	{
2922	int ret;
2923
2924	av_frame_unref(frame);
2925
2926	if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
2927	return AVERROR(EINVAL);
2928
2929	if (avctx->codec->receive_frame) {
2930	if (avctx->internal->draining && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
2931	return AVERROR_EOF;
2932	ret = avctx->codec->receive_frame(avctx, frame);
2933	if (ret >= 0) {
2934	if (av_frame_get_best_effort_timestamp(frame) == AV_NOPTS_VALUE) {
2935	av_frame_set_best_effort_timestamp(frame,
2936	guess_correct_pts(avctx, frame->pts, frame->pkt_dts));
2937	}
2938	}
2939	return ret;
2940	}
2941
2942	// Emulation via old API.
2943
2944	if (!avctx->internal->buffer_frame->buf[0]) {
2945	if (!avctx->internal->buffer_pkt->size && !avctx->internal->draining)
2946	return AVERROR(EAGAIN);
2947
2948	while (1) {
2949	if ((ret = do_decode(avctx, avctx->internal->buffer_pkt)) < 0) {
2950	av_packet_unref(avctx->internal->buffer_pkt);
2951	return ret;
2952	}
2953	// Some audio decoders may consume partial data without returning
2954	// a frame (fate-wmapro-2ch). There is no way to make the caller
2955	// call avcodec_receive_frame() again without returning a frame,
2956	// so try to decode more in these cases.
2957	if (avctx->internal->buffer_frame->buf[0] ||
2958	!avctx->internal->buffer_pkt->size)
2959	break;
2960	}
2961	}
2962
2963	if (!avctx->internal->buffer_frame->buf[0])
2964	return avctx->internal->draining ? AVERROR_EOF : AVERROR(EAGAIN);
2965
2966	av_frame_move_ref(frame, avctx->internal->buffer_frame);
2967	return 0;
2968	}
2969
2970	static int do_encode(AVCodecContext *avctx, const AVFrame *frame, int *got_packet)
2971	{
2972	int ret;
2973	*got_packet = 0;
2974
2975	av_packet_unref(avctx->internal->buffer_pkt);
2976	avctx->internal->buffer_pkt_valid = 0;
2977
2978	if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
2979	ret = avcodec_encode_video2(avctx, avctx->internal->buffer_pkt,
2980	frame, got_packet);
2981	} else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
2982	ret = avcodec_encode_audio2(avctx, avctx->internal->buffer_pkt,
2983	frame, got_packet);
2984	} else {
2985	ret = AVERROR(EINVAL);
2986	}
2987
2988	if (ret >= 0 && *got_packet) {
2989	// Encoders must always return ref-counted buffers.
2990	// Side-data only packets have no data and can be not ref-counted.
2991	av_assert0(!avctx->internal->buffer_pkt->data || avctx->internal->buffer_pkt->buf);
2992	avctx->internal->buffer_pkt_valid = 1;
2993	ret = 0;
2994	} else {
2995	av_packet_unref(avctx->internal->buffer_pkt);
2996	}
2997
2998	return ret;
2999	}
3000
3001	int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
3002	{
3003	if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
3004	return AVERROR(EINVAL);
3005
3006	if (avctx->internal->draining)
3007	return AVERROR_EOF;
3008
3009	if (!frame) {
3010	avctx->internal->draining = 1;
3011
3012	if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
3013	return 0;
3014	}
3015
3016	if (avctx->codec->send_frame)
3017	return avctx->codec->send_frame(avctx, frame);
3018
3019	// Emulation via old API. Do it here instead of avcodec_receive_packet, because:
3020	// 1. if the AVFrame is not refcounted, the copying will be much more
3021	// expensive than copying the packet data
3022	// 2. assume few users use non-refcounted AVPackets, so usually no copy is
3023	// needed
3024
3025	if (avctx->internal->buffer_pkt_valid)
3026	return AVERROR(EAGAIN);
3027
3028	return do_encode(avctx, frame, &(int){0});
3029	}
3030
3031	int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
3032	{
3033	av_packet_unref(avpkt);
3034
3035	if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
3036	return AVERROR(EINVAL);
3037
3038	if (avctx->codec->receive_packet) {
3039	if (avctx->internal->draining && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
3040	return AVERROR_EOF;
3041	return avctx->codec->receive_packet(avctx, avpkt);
3042	}
3043
3044	// Emulation via old API.
3045
3046	if (!avctx->internal->buffer_pkt_valid) {
3047	int got_packet;
3048	int ret;
3049	if (!avctx->internal->draining)
3050	return AVERROR(EAGAIN);
3051	ret = do_encode(avctx, NULL, &got_packet);
3052	if (ret < 0)
3053	return ret;
3054	if (ret >= 0 && !got_packet)
3055	return AVERROR_EOF;
3056	}
3057
3058	av_packet_move_ref(avpkt, avctx->internal->buffer_pkt);
3059	avctx->internal->buffer_pkt_valid = 0;
3060	return 0;
3061	}
3062
3063	av_cold int avcodec_close(AVCodecContext *avctx)
3064	{
3065	int i;
3066
3067	if (!avctx)
3068	return 0;
3069
3070	if (avcodec_is_open(avctx)) {
3071	FramePool *pool = avctx->internal->pool;
3072	if (CONFIG_FRAME_THREAD_ENCODER &&
3073	avctx->internal->frame_thread_encoder && avctx->thread_count > 1) {
3074	ff_frame_thread_encoder_free(avctx);
3075	}
3076	if (HAVE_THREADS && avctx->internal->thread_ctx)
3077	ff_thread_free(avctx);
3078	if (avctx->codec && avctx->codec->close)
3079	avctx->codec->close(avctx);
3080	avctx->internal->byte_buffer_size = 0;
3081	av_freep(&avctx->internal->byte_buffer);
3082	av_frame_free(&avctx->internal->to_free);
3083	av_frame_free(&avctx->internal->buffer_frame);
3084	av_packet_free(&avctx->internal->buffer_pkt);
3085	for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
3086	av_buffer_pool_uninit(&pool->pools[i]);
3087	av_freep(&avctx->internal->pool);
3088
3089	if (avctx->hwaccel && avctx->hwaccel->uninit)
3090	avctx->hwaccel->uninit(avctx);
3091	av_freep(&avctx->internal->hwaccel_priv_data);
3092
3093	av_freep(&avctx->internal);
3094	}
3095
3096	for (i = 0; i < avctx->nb_coded_side_data; i++)
3097	av_freep(&avctx->coded_side_data[i].data);
3098	av_freep(&avctx->coded_side_data);
3099	avctx->nb_coded_side_data = 0;
3100
3101	av_buffer_unref(&avctx->hw_frames_ctx);
3102	av_buffer_unref(&avctx->hw_device_ctx);
3103
3104	if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
3105	av_opt_free(avctx->priv_data);
3106	av_opt_free(avctx);
3107	av_freep(&avctx->priv_data);
3108	if (av_codec_is_encoder(avctx->codec)) {
3109	av_freep(&avctx->extradata);
3110	#if FF_API_CODED_FRAME
3111	FF_DISABLE_DEPRECATION_WARNINGS
3112	av_frame_free(&avctx->coded_frame);
3113	FF_ENABLE_DEPRECATION_WARNINGS
3114	#endif
3115	}
3116	avctx->codec = NULL;
3117	avctx->active_thread_type = 0;
3118
3119	return 0;
3120	}
3121
3122	static enum AVCodecID remap_deprecated_codec_id(enum AVCodecID id)
3123	{
3124	switch(id){
3125	//This is for future deprecatec codec ids, its empty since
3126	//last major bump but will fill up again over time, please don't remove it
3127	default : return id;
3128	}
3129	}
3130
3131	static AVCodec *find_encdec(enum AVCodecID id, int encoder)
3132	{
3133	AVCodec *p, *experimental = NULL;
3134	p = first_avcodec;
3135	id= remap_deprecated_codec_id(id);
3136	while (p) {
3137	if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
3138	p->id == id) {
3139	if (p->capabilities & AV_CODEC_CAP_EXPERIMENTAL && !experimental) {
3140	experimental = p;
3141	} else
3142	return p;
3143	}
3144	p = p->next;
3145	}
3146	return experimental;
3147	}
3148
3149	AVCodec *avcodec_find_encoder(enum AVCodecID id)
3150	{
3151	return find_encdec(id, 1);
3152	}
3153
3154	AVCodec *avcodec_find_encoder_by_name(const char *name)
3155	{
3156	AVCodec *p;
3157	if (!name)
3158	return NULL;
3159	p = first_avcodec;
3160	while (p) {
3161	if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
3162	return p;
3163	p = p->next;
3164	}
3165	return NULL;
3166	}
3167
3168	AVCodec *avcodec_find_decoder(enum AVCodecID id)
3169	{
3170	return find_encdec(id, 0);
3171	}
3172
3173	AVCodec *avcodec_find_decoder_by_name(const char *name)
3174	{
3175	AVCodec *p;
3176	if (!name)
3177	return NULL;
3178	p = first_avcodec;
3179	while (p) {
3180	if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
3181	return p;
3182	p = p->next;
3183	}
3184	return NULL;
3185	}
3186
3187	const char *avcodec_get_name(enum AVCodecID id)
3188	{
3189	const AVCodecDescriptor *cd;
3190	AVCodec *codec;
3191
3192	if (id == AV_CODEC_ID_NONE)
3193	return "none";
3194	cd = avcodec_descriptor_get(id);
3195	if (cd)
3196	return cd->name;
3197	av_log(NULL, AV_LOG_WARNING, "Codec 0x%x is not in the full list.\n", id);
3198	codec = avcodec_find_decoder(id);
3199	if (codec)
3200	return codec->name;
3201	codec = avcodec_find_encoder(id);
3202	if (codec)
3203	return codec->name;
3204	return "unknown_codec";
3205	}
3206
3207	size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
3208	{
3209	int i, len, ret = 0;
3210
3211	#define TAG_PRINT(x) \
3212	(((x) >= '0' && (x) <= '9') || \
3213	((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
3214	((x) == '.' || (x) == ' ' || (x) == '-' || (x) == '_'))
3215
3216	for (i = 0; i < 4; i++) {
3217	len = snprintf(buf, buf_size,
3218	TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
3219	buf += len;
3220	buf_size = buf_size > len ? buf_size - len : 0;
3221	ret += len;
3222	codec_tag >>= 8;
3223	}
3224	return ret;
3225	}
3226
3227	void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
3228	{
3229	const char *codec_type;
3230	const char *codec_name;
3231	const char *profile = NULL;
3232	int64_t bitrate;
3233	int new_line = 0;
3234	AVRational display_aspect_ratio;
3235	const char *separator = enc->dump_separator ? (const char *)enc->dump_separator : ", ";
3236
3237	if (!buf || buf_size <= 0)
3238	return;
3239	codec_type = av_get_media_type_string(enc->codec_type);
3240	codec_name = avcodec_get_name(enc->codec_id);
3241	profile = avcodec_profile_name(enc->codec_id, enc->profile);
3242
3243	snprintf(buf, buf_size, "%s: %s", codec_type ? codec_type : "unknown",
3244	codec_name);
3245	buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
3246
3247	if (enc->codec && strcmp(enc->codec->name, codec_name))
3248	snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", enc->codec->name);
3249
3250	if (profile)
3251	snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile);
3252	if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
3253	&& av_log_get_level() >= AV_LOG_VERBOSE
3254	&& enc->refs)
3255	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3256	", %d reference frame%s",
3257	enc->refs, enc->refs > 1 ? "s" : "");
3258
3259	if (enc->codec_tag)
3260	snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s / 0x%04X)",
3261	av_fourcc2str(enc->codec_tag), enc->codec_tag);
3262
3263	switch (enc->codec_type) {
3264	case AVMEDIA_TYPE_VIDEO:
3265	{
3266	char detail[256] = "(";
3267
3268	av_strlcat(buf, separator, buf_size);
3269
3270	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3271	"%s", enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :
3272	av_get_pix_fmt_name(enc->pix_fmt));
3273	if (enc->bits_per_raw_sample && enc->pix_fmt != AV_PIX_FMT_NONE &&
3274	enc->bits_per_raw_sample < av_pix_fmt_desc_get(enc->pix_fmt)->comp[0].depth)
3275	av_strlcatf(detail, sizeof(detail), "%d bpc, ", enc->bits_per_raw_sample);
3276	if (enc->color_range != AVCOL_RANGE_UNSPECIFIED)
3277	av_strlcatf(detail, sizeof(detail), "%s, ",
3278	av_color_range_name(enc->color_range));
3279
3280	if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||
3281	enc->color_primaries != AVCOL_PRI_UNSPECIFIED ||
3282	enc->color_trc != AVCOL_TRC_UNSPECIFIED) {
3283	if (enc->colorspace != (int)enc->color_primaries ||
3284	enc->colorspace != (int)enc->color_trc) {
3285	new_line = 1;
3286	av_strlcatf(detail, sizeof(detail), "%s/%s/%s, ",
3287	av_color_space_name(enc->colorspace),
3288	av_color_primaries_name(enc->color_primaries),
3289	av_color_transfer_name(enc->color_trc));
3290	} else
3291	av_strlcatf(detail, sizeof(detail), "%s, ",
3292	av_get_colorspace_name(enc->colorspace));
3293	}
3294
3295	if (enc->field_order != AV_FIELD_UNKNOWN) {
3296	const char *field_order = "progressive";
3297	if (enc->field_order == AV_FIELD_TT)
3298	field_order = "top first";
3299	else if (enc->field_order == AV_FIELD_BB)
3300	field_order = "bottom first";
3301	else if (enc->field_order == AV_FIELD_TB)
3302	field_order = "top coded first (swapped)";
3303	else if (enc->field_order == AV_FIELD_BT)
3304	field_order = "bottom coded first (swapped)";
3305
3306	av_strlcatf(detail, sizeof(detail), "%s, ", field_order);
3307	}
3308
3309	if (av_log_get_level() >= AV_LOG_VERBOSE &&
3310	enc->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
3311	av_strlcatf(detail, sizeof(detail), "%s, ",
3312	av_chroma_location_name(enc->chroma_sample_location));
3313
3314	if (strlen(detail) > 1) {
3315	detail[strlen(detail) - 2] = 0;
3316	av_strlcatf(buf, buf_size, "%s)", detail);
3317	}
3318	}
3319
3320	if (enc->width) {
3321	av_strlcat(buf, new_line ? separator : ", ", buf_size);
3322
3323	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3324	"%dx%d",
3325	enc->width, enc->height);
3326
3327	if (av_log_get_level() >= AV_LOG_VERBOSE &&
3328	(enc->width != enc->coded_width ||
3329	enc->height != enc->coded_height))
3330	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3331	" (%dx%d)", enc->coded_width, enc->coded_height);
3332
3333	if (enc->sample_aspect_ratio.num) {
3334	av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3335	enc->width * (int64_t)enc->sample_aspect_ratio.num,
3336	enc->height * (int64_t)enc->sample_aspect_ratio.den,
3337	1024 * 1024);
3338	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3339	" [SAR %d:%d DAR %d:%d]",
3340	enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
3341	display_aspect_ratio.num, display_aspect_ratio.den);
3342	}
3343	if (av_log_get_level() >= AV_LOG_DEBUG) {
3344	int g = av_gcd(enc->time_base.num, enc->time_base.den);
3345	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3346	", %d/%d",
3347	enc->time_base.num / g, enc->time_base.den / g);
3348	}
3349	}
3350	if (encode) {
3351	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3352	", q=%d-%d", enc->qmin, enc->qmax);
3353	} else {
3354	if (enc->properties & FF_CODEC_PROPERTY_CLOSED_CAPTIONS)
3355	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3356	", Closed Captions");
3357	if (enc->properties & FF_CODEC_PROPERTY_LOSSLESS)
3358	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3359	", lossless");
3360	}
3361	break;
3362	case AVMEDIA_TYPE_AUDIO:
3363	av_strlcat(buf, separator, buf_size);
3364
3365	if (enc->sample_rate) {
3366	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3367	"%d Hz, ", enc->sample_rate);
3368	}
3369	av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
3370	if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
3371	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3372	", %s", av_get_sample_fmt_name(enc->sample_fmt));
3373	}
3374	if ( enc->bits_per_raw_sample > 0
3375	&& enc->bits_per_raw_sample != av_get_bytes_per_sample(enc->sample_fmt) * 8)
3376	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3377	" (%d bit)", enc->bits_per_raw_sample);
3378	if (av_log_get_level() >= AV_LOG_VERBOSE) {
3379	if (enc->initial_padding)
3380	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3381	", delay %d", enc->initial_padding);
3382	if (enc->trailing_padding)
3383	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3384	", padding %d", enc->trailing_padding);
3385	}
3386	break;
3387	case AVMEDIA_TYPE_DATA:
3388	if (av_log_get_level() >= AV_LOG_DEBUG) {
3389	int g = av_gcd(enc->time_base.num, enc->time_base.den);
3390	if (g)
3391	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3392	", %d/%d",
3393	enc->time_base.num / g, enc->time_base.den / g);
3394	}
3395	break;
3396	case AVMEDIA_TYPE_SUBTITLE:
3397	if (enc->width)
3398	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3399	", %dx%d", enc->width, enc->height);
3400	break;
3401	default:
3402	return;
3403	}
3404	if (encode) {
3405	if (enc->flags & AV_CODEC_FLAG_PASS1)
3406	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3407	", pass 1");
3408	if (enc->flags & AV_CODEC_FLAG_PASS2)
3409	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3410	", pass 2");
3411	}
3412	bitrate = get_bit_rate(enc);
3413	if (bitrate != 0) {
3414	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3415	", %"PRId64" kb/s", bitrate / 1000);
3416	} else if (enc->rc_max_rate > 0) {
3417	snprintf(buf + strlen(buf), buf_size - strlen(buf),
3418	", max. %"PRId64" kb/s", (int64_t)enc->rc_max_rate / 1000);
3419	}
3420	}
3421
3422	const char *av_get_profile_name(const AVCodec *codec, int profile)
3423	{
3424	const AVProfile *p;
3425	if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
3426	return NULL;
3427
3428	for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
3429	if (p->profile == profile)
3430	return p->name;
3431
3432	return NULL;
3433	}
3434
3435	const char *avcodec_profile_name(enum AVCodecID codec_id, int profile)
3436	{
3437	const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
3438	const AVProfile *p;
3439
3440	if (profile == FF_PROFILE_UNKNOWN || !desc || !desc->profiles)
3441	return NULL;
3442
3443	for (p = desc->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
3444	if (p->profile == profile)
3445	return p->name;
3446
3447	return NULL;
3448	}
3449
3450	unsigned avcodec_version(void)
3451	{
3452	// av_assert0(AV_CODEC_ID_V410==164);
3453	av_assert0(AV_CODEC_ID_PCM_S8_PLANAR==65563);
3454	av_assert0(AV_CODEC_ID_ADPCM_G722==69660);
3455	// av_assert0(AV_CODEC_ID_BMV_AUDIO==86071);
3456	av_assert0(AV_CODEC_ID_SRT==94216);
3457	av_assert0(LIBAVCODEC_VERSION_MICRO >= 100);
3458
3459	return LIBAVCODEC_VERSION_INT;
3460	}
3461
3462	const char *avcodec_configuration(void)
3463	{
3464	return FFMPEG_CONFIGURATION;
3465	}
3466
3467	const char *avcodec_license(void)
3468	{
3469	#define LICENSE_PREFIX "libavcodec license: "
3470	return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
3471	}
3472
3473	void avcodec_flush_buffers(AVCodecContext *avctx)
3474	{
3475	avctx->internal->draining = 0;
3476	avctx->internal->draining_done = 0;
3477	av_frame_unref(avctx->internal->buffer_frame);
3478	av_packet_unref(avctx->internal->buffer_pkt);
3479	avctx->internal->buffer_pkt_valid = 0;
3480
3481	if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
3482	ff_thread_flush(avctx);
3483	else if (avctx->codec->flush)
3484	avctx->codec->flush(avctx);
3485
3486	avctx->pts_correction_last_pts =
3487	avctx->pts_correction_last_dts = INT64_MIN;
3488
3489	if (!avctx->refcounted_frames)
3490	av_frame_unref(avctx->internal->to_free);
3491	}
3492
3493	int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
3494	{
3495	switch (codec_id) {
3496	case AV_CODEC_ID_8SVX_EXP:
3497	case AV_CODEC_ID_8SVX_FIB:
3498	case AV_CODEC_ID_ADPCM_CT:
3499	case AV_CODEC_ID_ADPCM_IMA_APC:
3500	case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
3501	case AV_CODEC_ID_ADPCM_IMA_OKI:
3502	case AV_CODEC_ID_ADPCM_IMA_WS:
3503	case AV_CODEC_ID_ADPCM_G722:
3504	case AV_CODEC_ID_ADPCM_YAMAHA:
3505	case AV_CODEC_ID_ADPCM_AICA:
3506	return 4;
3507	case AV_CODEC_ID_DSD_LSBF:
3508	case AV_CODEC_ID_DSD_MSBF:
3509	case AV_CODEC_ID_DSD_LSBF_PLANAR:
3510	case AV_CODEC_ID_DSD_MSBF_PLANAR:
3511	case AV_CODEC_ID_PCM_ALAW:
3512	case AV_CODEC_ID_PCM_MULAW:
3513	case AV_CODEC_ID_PCM_S8:
3514	case AV_CODEC_ID_PCM_S8_PLANAR:
3515	case AV_CODEC_ID_PCM_U8:
3516	case AV_CODEC_ID_PCM_ZORK:
3517	case AV_CODEC_ID_SDX2_DPCM:
3518	return 8;
3519	case AV_CODEC_ID_PCM_S16BE:
3520	case AV_CODEC_ID_PCM_S16BE_PLANAR:
3521	case AV_CODEC_ID_PCM_S16LE:
3522	case AV_CODEC_ID_PCM_S16LE_PLANAR:
3523	case AV_CODEC_ID_PCM_U16BE:
3524	case AV_CODEC_ID_PCM_U16LE:
3525	return 16;
3526	case AV_CODEC_ID_PCM_S24DAUD:
3527	case AV_CODEC_ID_PCM_S24BE:
3528	case AV_CODEC_ID_PCM_S24LE:
3529	case AV_CODEC_ID_PCM_S24LE_PLANAR:
3530	case AV_CODEC_ID_PCM_U24BE:
3531	case AV_CODEC_ID_PCM_U24LE:
3532	return 24;
3533	case AV_CODEC_ID_PCM_S32BE:
3534	case AV_CODEC_ID_PCM_S32LE:
3535	case AV_CODEC_ID_PCM_S32LE_PLANAR:
3536	case AV_CODEC_ID_PCM_U32BE:
3537	case AV_CODEC_ID_PCM_U32LE:
3538	case AV_CODEC_ID_PCM_F32BE:
3539	case AV_CODEC_ID_PCM_F32LE:
3540	case AV_CODEC_ID_PCM_F24LE:
3541	case AV_CODEC_ID_PCM_F16LE:
3542	return 32;
3543	case AV_CODEC_ID_PCM_F64BE:
3544	case AV_CODEC_ID_PCM_F64LE:
3545	case AV_CODEC_ID_PCM_S64BE:
3546	case AV_CODEC_ID_PCM_S64LE:
3547	return 64;
3548	default:
3549	return 0;
3550	}
3551	}
3552
3553	enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
3554	{
3555	static const enum AVCodecID map[AV_SAMPLE_FMT_NB][2] = {
3556	[AV_SAMPLE_FMT_U8 ] = { AV_CODEC_ID_PCM_U8, AV_CODEC_ID_PCM_U8 },
3557	[AV_SAMPLE_FMT_S16 ] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
3558	[AV_SAMPLE_FMT_S32 ] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
3559	[AV_SAMPLE_FMT_FLT ] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
3560	[AV_SAMPLE_FMT_DBL ] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
3561	[AV_SAMPLE_FMT_U8P ] = { AV_CODEC_ID_PCM_U8, AV_CODEC_ID_PCM_U8 },
3562	[AV_SAMPLE_FMT_S16P] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
3563	[AV_SAMPLE_FMT_S32P] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
3564	[AV_SAMPLE_FMT_S64P] = { AV_CODEC_ID_PCM_S64LE, AV_CODEC_ID_PCM_S64BE },
3565	[AV_SAMPLE_FMT_FLTP] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
3566	[AV_SAMPLE_FMT_DBLP] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
3567	};
3568	if (fmt < 0 || fmt >= AV_SAMPLE_FMT_NB)
3569	return AV_CODEC_ID_NONE;
3570	if (be < 0 || be > 1)
3571	be = AV_NE(1, 0);
3572	return map[fmt][be];
3573	}
3574
3575	int av_get_bits_per_sample(enum AVCodecID codec_id)
3576	{
3577	switch (codec_id) {
3578	case AV_CODEC_ID_ADPCM_SBPRO_2:
3579	return 2;
3580	case AV_CODEC_ID_ADPCM_SBPRO_3:
3581	return 3;
3582	case AV_CODEC_ID_ADPCM_SBPRO_4:
3583	case AV_CODEC_ID_ADPCM_IMA_WAV:
3584	case AV_CODEC_ID_ADPCM_IMA_QT:
3585	case AV_CODEC_ID_ADPCM_SWF:
3586	case AV_CODEC_ID_ADPCM_MS:
3587	return 4;
3588	default:
3589	return av_get_exact_bits_per_sample(codec_id);
3590	}
3591	}
3592
3593	static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
3594	uint32_t tag, int bits_per_coded_sample, int64_t bitrate,
3595	uint8_t * extradata, int frame_size, int frame_bytes)
3596	{
3597	int bps = av_get_exact_bits_per_sample(id);
3598	int framecount = (ba > 0 && frame_bytes / ba > 0) ? frame_bytes / ba : 1;
3599
3600	/* codecs with an exact constant bits per sample */
3601	if (bps > 0 && ch > 0 && frame_bytes > 0 && ch < 32768 && bps < 32768)
3602	return (frame_bytes * 8LL) / (bps * ch);
3603	bps = bits_per_coded_sample;
3604
3605	/* codecs with a fixed packet duration */
3606	switch (id) {
3607	case AV_CODEC_ID_ADPCM_ADX: return 32;
3608	case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
3609	case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
3610	case AV_CODEC_ID_AMR_NB:
3611	case AV_CODEC_ID_EVRC:
3612	case AV_CODEC_ID_GSM:
3613	case AV_CODEC_ID_QCELP:
3614	case AV_CODEC_ID_RA_288: return 160;
3615	case AV_CODEC_ID_AMR_WB:
3616	case AV_CODEC_ID_GSM_MS: return 320;
3617	case AV_CODEC_ID_MP1: return 384;
3618	case AV_CODEC_ID_ATRAC1: return 512;
3619	case AV_CODEC_ID_ATRAC3: return 1024 * framecount;
3620	case AV_CODEC_ID_ATRAC3P: return 2048;
3621	case AV_CODEC_ID_MP2:
3622	case AV_CODEC_ID_MUSEPACK7: return 1152;
3623	case AV_CODEC_ID_AC3: return 1536;
3624	}
3625
3626	if (sr > 0) {
3627	/* calc from sample rate */
3628	if (id == AV_CODEC_ID_TTA)
3629	return 256 * sr / 245;
3630	else if (id == AV_CODEC_ID_DST)
3631	return 588 * sr / 44100;
3632
3633	if (ch > 0) {
3634	/* calc from sample rate and channels */
3635	if (id == AV_CODEC_ID_BINKAUDIO_DCT)
3636	return (480 << (sr / 22050)) / ch;
3637	}
3638	}
3639
3640	if (ba > 0) {
3641	/* calc from block_align */
3642	if (id == AV_CODEC_ID_SIPR) {
3643	switch (ba) {
3644	case 20: return 160;
3645	case 19: return 144;
3646	case 29: return 288;
3647	case 37: return 480;
3648	}
3649	} else if (id == AV_CODEC_ID_ILBC) {
3650	switch (ba) {
3651	case 38: return 160;
3652	case 50: return 240;
3653	}
3654	}
3655	}
3656
3657	if (frame_bytes > 0) {
3658	/* calc from frame_bytes only */
3659	if (id == AV_CODEC_ID_TRUESPEECH)
3660	return 240 * (frame_bytes / 32);
3661	if (id == AV_CODEC_ID_NELLYMOSER)
3662	return 256 * (frame_bytes / 64);
3663	if (id == AV_CODEC_ID_RA_144)
3664	return 160 * (frame_bytes / 20);
3665	if (id == AV_CODEC_ID_G723_1)
3666	return 240 * (frame_bytes / 24);
3667
3668	if (bps > 0) {
3669	/* calc from frame_bytes and bits_per_coded_sample */
3670	if (id == AV_CODEC_ID_ADPCM_G726)
3671	return frame_bytes * 8 / bps;
3672	}
3673
3674	if (ch > 0 && ch < INT_MAX/16) {
3675	/* calc from frame_bytes and channels */
3676	switch (id) {
3677	case AV_CODEC_ID_ADPCM_AFC:
3678	return frame_bytes / (9 * ch) * 16;
3679	case AV_CODEC_ID_ADPCM_PSX:
3680	case AV_CODEC_ID_ADPCM_DTK:
3681	return frame_bytes / (16 * ch) * 28;
3682	case AV_CODEC_ID_ADPCM_4XM:
3683	case AV_CODEC_ID_ADPCM_IMA_DAT4:
3684	case AV_CODEC_ID_ADPCM_IMA_ISS:
3685	return (frame_bytes - 4 * ch) * 2 / ch;
3686	case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
3687	return (frame_bytes - 4) * 2 / ch;
3688	case AV_CODEC_ID_ADPCM_IMA_AMV:
3689	return (frame_bytes - 8) * 2 / ch;
3690	case AV_CODEC_ID_ADPCM_THP:
3691	case AV_CODEC_ID_ADPCM_THP_LE:
3692	if (extradata)
3693	return frame_bytes * 14 / (8 * ch);
3694	break;
3695	case AV_CODEC_ID_ADPCM_XA:
3696	return (frame_bytes / 128) * 224 / ch;
3697	case AV_CODEC_ID_INTERPLAY_DPCM:
3698	return (frame_bytes - 6 - ch) / ch;
3699	case AV_CODEC_ID_ROQ_DPCM:
3700	return (frame_bytes - 8) / ch;
3701	case AV_CODEC_ID_XAN_DPCM:
3702	return (frame_bytes - 2 * ch) / ch;
3703	case AV_CODEC_ID_MACE3:
3704	return 3 * frame_bytes / ch;
3705	case AV_CODEC_ID_MACE6:
3706	return 6 * frame_bytes / ch;
3707	case AV_CODEC_ID_PCM_LXF:
3708	return 2 * (frame_bytes / (5 * ch));
3709	case AV_CODEC_ID_IAC:
3710	case AV_CODEC_ID_IMC:
3711	return 4 * frame_bytes / ch;
3712	}
3713
3714	if (tag) {
3715	/* calc from frame_bytes, channels, and codec_tag */
3716	if (id == AV_CODEC_ID_SOL_DPCM) {
3717	if (tag == 3)
3718	return frame_bytes / ch;
3719	else
3720	return frame_bytes * 2 / ch;
3721	}
3722	}
3723
3724	if (ba > 0) {
3725	/* calc from frame_bytes, channels, and block_align */
3726	int blocks = frame_bytes / ba;
3727	switch (id) {
3728	case AV_CODEC_ID_ADPCM_IMA_WAV:
3729	if (bps < 2 || bps > 5)
3730	return 0;
3731	return blocks * (1 + (ba - 4 * ch) / (bps * ch) * 8);
3732	case AV_CODEC_ID_ADPCM_IMA_DK3:
3733	return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
3734	case AV_CODEC_ID_ADPCM_IMA_DK4:
3735	return blocks * (1 + (ba - 4 * ch) * 2 / ch);
3736	case AV_CODEC_ID_ADPCM_IMA_RAD:
3737	return blocks * ((ba - 4 * ch) * 2 / ch);
3738	case AV_CODEC_ID_ADPCM_MS:
3739	return blocks * (2 + (ba - 7 * ch) * 2 / ch);
3740	case AV_CODEC_ID_ADPCM_MTAF:
3741	return blocks * (ba - 16) * 2 / ch;
3742	}
3743	}
3744
3745	if (bps > 0) {
3746	/* calc from frame_bytes, channels, and bits_per_coded_sample */
3747	switch (id) {
3748	case AV_CODEC_ID_PCM_DVD:
3749	if(bps<4)
3750	return 0;
3751	return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
3752	case AV_CODEC_ID_PCM_BLURAY:
3753	if(bps<4)
3754	return 0;
3755	return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
3756	case AV_CODEC_ID_S302M:
3757	return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
3758	}
3759	}
3760	}
3761	}
3762
3763	/* Fall back on using frame_size */
3764	if (frame_size > 1 && frame_bytes)
3765	return frame_size;
3766
3767	//For WMA we currently have no other means to calculate duration thus we
3768	//do it here by assuming CBR, which is true for all known cases.
3769	if (bitrate > 0 && frame_bytes > 0 && sr > 0 && ba > 1) {
3770	if (id == AV_CODEC_ID_WMAV1 || id == AV_CODEC_ID_WMAV2)
3771	return (frame_bytes * 8LL * sr) / bitrate;
3772	}
3773
3774	return 0;
3775	}
3776
3777	int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
3778	{
3779	return get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
3780	avctx->channels, avctx->block_align,
3781	avctx->codec_tag, avctx->bits_per_coded_sample,
3782	avctx->bit_rate, avctx->extradata, avctx->frame_size,
3783	frame_bytes);
3784	}
3785
3786	int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
3787	{
3788	return get_audio_frame_duration(par->codec_id, par->sample_rate,
3789	par->channels, par->block_align,
3790	par->codec_tag, par->bits_per_coded_sample,
3791	par->bit_rate, par->extradata, par->frame_size,
3792	frame_bytes);
3793	}
3794
3795	#if !HAVE_THREADS
3796	int ff_thread_init(AVCodecContext *s)
3797	{
3798	return -1;
3799	}
3800
3801	#endif
3802
3803	unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
3804	{
3805	unsigned int n = 0;
3806
3807	while (v >= 0xff) {
3808	*s++ = 0xff;
3809	v -= 0xff;
3810	n++;
3811	}
3812	*s = v;
3813	n++;
3814	return n;
3815	}
3816
3817	int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
3818	{
3819	int i;
3820	for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
3821	return i;
3822	}
3823
3824	#if FF_API_MISSING_SAMPLE
3825	FF_DISABLE_DEPRECATION_WARNINGS
3826	void av_log_missing_feature(void *avc, const char *feature, int want_sample)
3827	{
3828	av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your FFmpeg "
3829	"version to the newest one from Git. If the problem still "
3830	"occurs, it means that your file has a feature which has not "
3831	"been implemented.\n", feature);
3832	if(want_sample)
3833	av_log_ask_for_sample(avc, NULL);
3834	}
3835
3836	void av_log_ask_for_sample(void *avc, const char *msg, ...)
3837	{
3838	va_list argument_list;
3839
3840	va_start(argument_list, msg);
3841
3842	if (msg)
3843	av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
3844	av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
3845	"of this file to ftp://upload.ffmpeg.org/incoming/ "
3846	"and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)\n");
3847
3848	va_end(argument_list);
3849	}
3850	FF_ENABLE_DEPRECATION_WARNINGS
3851	#endif /* FF_API_MISSING_SAMPLE */
3852
3853	static AVHWAccel *first_hwaccel = NULL;
3854	static AVHWAccel **last_hwaccel = &first_hwaccel;
3855
3856	void av_register_hwaccel(AVHWAccel *hwaccel)
3857	{
3858	AVHWAccel **p = last_hwaccel;
3859	hwaccel->next = NULL;
3860	while(*p || avpriv_atomic_ptr_cas((void * volatile *)p, NULL, hwaccel))
3861	p = &(*p)->next;
3862	last_hwaccel = &hwaccel->next;
3863	}
3864
3865	AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel)
3866	{
3867	return hwaccel ? hwaccel->next : first_hwaccel;
3868	}
3869
3870	int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
3871	{
3872	if (lockmgr_cb) {
3873	// There is no good way to rollback a failure to destroy the
3874	// mutex, so we ignore failures.
3875	lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY);
3876	lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY);
3877	lockmgr_cb = NULL;
3878	codec_mutex = NULL;
3879	avformat_mutex = NULL;
3880	}
3881
3882	if (cb) {
3883	void *new_codec_mutex = NULL;
3884	void *new_avformat_mutex = NULL;
3885	int err;
3886	if (err = cb(&new_codec_mutex, AV_LOCK_CREATE)) {
3887	return err > 0 ? AVERROR_UNKNOWN : err;
3888	}
3889	if (err = cb(&new_avformat_mutex, AV_LOCK_CREATE)) {
3890	// Ignore failures to destroy the newly created mutex.
3891	cb(&new_codec_mutex, AV_LOCK_DESTROY);
3892	return err > 0 ? AVERROR_UNKNOWN : err;
3893	}
3894	lockmgr_cb = cb;
3895	codec_mutex = new_codec_mutex;
3896	avformat_mutex = new_avformat_mutex;
3897	}
3898
3899	return 0;
3900	}
3901
3902	int ff_lock_avcodec(AVCodecContext *log_ctx, const AVCodec *codec)
3903	{
3904	if (codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE || !codec->init)
3905	return 0;
3906
3907	if (lockmgr_cb) {
3908	if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
3909	return -1;
3910	}
3911
3912	if (avpriv_atomic_int_add_and_fetch(&entangled_thread_counter, 1) != 1) {
3913	av_log(log_ctx, AV_LOG_ERROR,
3914	"Insufficient thread locking. At least %d threads are "
3915	"calling avcodec_open2() at the same time right now.\n",
3916	entangled_thread_counter);
3917	if (!lockmgr_cb)
3918	av_log(log_ctx, AV_LOG_ERROR, "No lock manager is set, please see av_lockmgr_register()\n");
3919	ff_avcodec_locked = 1;
3920	ff_unlock_avcodec(codec);
3921	return AVERROR(EINVAL);
3922	}
3923	av_assert0(!ff_avcodec_locked);
3924	ff_avcodec_locked = 1;
3925	return 0;
3926	}
3927
3928	int ff_unlock_avcodec(const AVCodec *codec)
3929	{
3930	if (codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE || !codec->init)
3931	return 0;
3932
3933	av_assert0(ff_avcodec_locked);
3934	ff_avcodec_locked = 0;
3935	avpriv_atomic_int_add_and_fetch(&entangled_thread_counter, -1);
3936	if (lockmgr_cb) {
3937	if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE))
3938	return -1;
3939	}
3940
3941	return 0;
3942	}
3943
3944	int avpriv_lock_avformat(void)
3945	{
3946	if (lockmgr_cb) {
3947	if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
3948	return -1;
3949	}
3950	return 0;
3951	}
3952
3953	int avpriv_unlock_avformat(void)
3954	{
3955	if (lockmgr_cb) {
3956	if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
3957	return -1;
3958	}
3959	return 0;
3960	}
3961
3962	unsigned int avpriv_toupper4(unsigned int x)
3963	{
3964	return av_toupper(x & 0xFF) +
3965	(av_toupper((x >> 8) & 0xFF) << 8) +
3966	(av_toupper((x >> 16) & 0xFF) << 16) +
3967	((unsigned)av_toupper((x >> 24) & 0xFF) << 24);
3968	}
3969
3970	int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
3971	{
3972	int ret;
3973
3974	dst->owner[0] = src->owner[0];
3975	dst->owner[1] = src->owner[1];
3976
3977	ret = av_frame_ref(dst->f, src->f);
3978	if (ret < 0)
3979	return ret;
3980
3981	av_assert0(!dst->progress);
3982
3983	if (src->progress &&
3984	!(dst->progress = av_buffer_ref(src->progress))) {
3985	ff_thread_release_buffer(dst->owner[0], dst);
3986	return AVERROR(ENOMEM);
3987	}
3988
3989	return 0;
3990	}
3991
3992	#if !HAVE_THREADS
3993
3994	enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
3995	{
3996	return ff_get_format(avctx, fmt);
3997	}
3998
3999	int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
4000	{
4001	f->owner[0] = f->owner[1] = avctx;
4002	return ff_get_buffer(avctx, f->f, flags);
4003	}
4004
4005	void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
4006	{
4007	if (f->f)
4008	av_frame_unref(f->f);
4009	}
4010
4011	void ff_thread_finish_setup(AVCodecContext *avctx)
4012	{
4013	}
4014
4015	void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
4016	{
4017	}
4018
4019	void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
4020	{
4021	}
4022
4023	int ff_thread_can_start_frame(AVCodecContext *avctx)
4024	{
4025	return 1;
4026	}
4027
4028	int ff_alloc_entries(AVCodecContext *avctx, int count)
4029	{
4030	return 0;
4031	}
4032
4033	void ff_reset_entries(AVCodecContext *avctx)
4034	{
4035	}
4036
4037	void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
4038	{
4039	}
4040
4041	void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
4042	{
4043	}
4044
4045	#endif
4046
4047	int avcodec_is_open(AVCodecContext *s)
4048	{
4049	return !!s->internal;
4050	}
4051
4052	int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf)
4053	{
4054	int ret;
4055	char *str;
4056
4057	ret = av_bprint_finalize(buf, &str);
4058	if (ret < 0)
4059	return ret;
4060	if (!av_bprint_is_complete(buf)) {
4061	av_free(str);
4062	return AVERROR(ENOMEM);
4063	}
4064
4065	avctx->extradata = str;
4066	/* Note: the string is NUL terminated (so extradata can be read as a
4067	* string), but the ending character is not accounted in the size (in
4068	* binary formats you are likely not supposed to mux that character). When
4069	* extradata is copied, it is also padded with AV_INPUT_BUFFER_PADDING_SIZE
4070	* zeros. */
4071	avctx->extradata_size = buf->len;
4072	return 0;
4073	}
4074
4075	const uint8_t *avpriv_find_start_code(const uint8_t *av_restrict p,
4076	const uint8_t *end,
4077	uint32_t *av_restrict state)
4078	{
4079	int i;
4080
4081	av_assert0(p <= end);
4082	if (p >= end)
4083	return end;
4084
4085	for (i = 0; i < 3; i++) {
4086	uint32_t tmp = *state << 8;
4087	*state = tmp + *(p++);
4088	if (tmp == 0x100 || p == end)
4089	return p;
4090	}
4091
4092	while (p < end) {
4093	if (p[-1] > 1 ) p += 3;
4094	else if (p[-2] ) p += 2;
4095	else if (p[-3]|(p[-1]-1)) p++;
4096	else {
4097	p++;
4098	break;
4099	}
4100	}
4101
4102	p = FFMIN(p, end) - 4;
4103	*state = AV_RB32(p);
4104
4105	return p + 4;
4106	}
4107
4108	AVCPBProperties *av_cpb_properties_alloc(size_t *size)
4109	{
4110	AVCPBProperties *props = av_mallocz(sizeof(AVCPBProperties));
4111	if (!props)
4112	return NULL;
4113
4114	if (size)
4115	*size = sizeof(*props);
4116
4117	props->vbv_delay = UINT64_MAX;
4118
4119	return props;
4120	}
4121
4122	AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx)
4123	{
4124	AVPacketSideData *tmp;
4125	AVCPBProperties *props;
4126	size_t size;
4127
4128	props = av_cpb_properties_alloc(&size);
4129	if (!props)
4130	return NULL;
4131
4132	tmp = av_realloc_array(avctx->coded_side_data, avctx->nb_coded_side_data + 1, sizeof(*tmp));
4133	if (!tmp) {
4134	av_freep(&props);
4135	return NULL;
4136	}
4137
4138	avctx->coded_side_data = tmp;
4139	avctx->nb_coded_side_data++;
4140
4141	avctx->coded_side_data[avctx->nb_coded_side_data - 1].type = AV_PKT_DATA_CPB_PROPERTIES;
4142	avctx->coded_side_data[avctx->nb_coded_side_data - 1].data = (uint8_t*)props;
4143	avctx->coded_side_data[avctx->nb_coded_side_data - 1].size = size;
4144
4145	return props;
4146	}
4147
4148	static void codec_parameters_reset(AVCodecParameters *par)
4149	{
4150	av_freep(&par->extradata);
4151
4152	memset(par, 0, sizeof(*par));
4153
4154	par->codec_type = AVMEDIA_TYPE_UNKNOWN;
4155	par->codec_id = AV_CODEC_ID_NONE;
4156	par->format = -1;
4157	par->field_order = AV_FIELD_UNKNOWN;
4158	par->color_range = AVCOL_RANGE_UNSPECIFIED;
4159	par->color_primaries = AVCOL_PRI_UNSPECIFIED;
4160	par->color_trc = AVCOL_TRC_UNSPECIFIED;
4161	par->color_space = AVCOL_SPC_UNSPECIFIED;
4162	par->chroma_location = AVCHROMA_LOC_UNSPECIFIED;
4163	par->sample_aspect_ratio = (AVRational){ 0, 1 };
4164	par->profile = FF_PROFILE_UNKNOWN;
4165	par->level = FF_LEVEL_UNKNOWN;
4166	}
4167
4168	AVCodecParameters *avcodec_parameters_alloc(void)
4169	{
4170	AVCodecParameters *par = av_mallocz(sizeof(*par));
4171
4172	if (!par)
4173	return NULL;
4174	codec_parameters_reset(par);
4175	return par;
4176	}
4177
4178	void avcodec_parameters_free(AVCodecParameters **ppar)
4179	{
4180	AVCodecParameters *par = *ppar;
4181
4182	if (!par)
4183	return;
4184	codec_parameters_reset(par);
4185
4186	av_freep(ppar);
4187	}
4188
4189	int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
4190	{
4191	codec_parameters_reset(dst);
4192	memcpy(dst, src, sizeof(*dst));
4193
4194	dst->extradata = NULL;
4195	dst->extradata_size = 0;
4196	if (src->extradata) {
4197	dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
4198	if (!dst->extradata)
4199	return AVERROR(ENOMEM);
4200	memcpy(dst->extradata, src->extradata, src->extradata_size);
4201	dst->extradata_size = src->extradata_size;
4202	}
4203
4204	return 0;
4205	}
4206
4207	int avcodec_parameters_from_context(AVCodecParameters *par,
4208	const AVCodecContext *codec)
4209	{
4210	codec_parameters_reset(par);
4211
4212	par->codec_type = codec->codec_type;
4213	par->codec_id = codec->codec_id;
4214	par->codec_tag = codec->codec_tag;
4215
4216	par->bit_rate = codec->bit_rate;
4217	par->bits_per_coded_sample = codec->bits_per_coded_sample;
4218	par->bits_per_raw_sample = codec->bits_per_raw_sample;
4219	par->profile = codec->profile;
4220	par->level = codec->level;
4221
4222	switch (par->codec_type) {
4223	case AVMEDIA_TYPE_VIDEO:
4224	par->format = codec->pix_fmt;
4225	par->width = codec->width;
4226	par->height = codec->height;
4227	par->field_order = codec->field_order;
4228	par->color_range = codec->color_range;
4229	par->color_primaries = codec->color_primaries;
4230	par->color_trc = codec->color_trc;
4231	par->color_space = codec->colorspace;
4232	par->chroma_location = codec->chroma_sample_location;
4233	par->sample_aspect_ratio = codec->sample_aspect_ratio;
4234	par->video_delay = codec->has_b_frames;
4235	break;
4236	case AVMEDIA_TYPE_AUDIO:
4237	par->format = codec->sample_fmt;
4238	par->channel_layout = codec->channel_layout;
4239	par->channels = codec->channels;
4240	par->sample_rate = codec->sample_rate;
4241	par->block_align = codec->block_align;
4242	par->frame_size = codec->frame_size;
4243	par->initial_padding = codec->initial_padding;
4244	par->trailing_padding = codec->trailing_padding;
4245	par->seek_preroll = codec->seek_preroll;
4246	break;
4247	case AVMEDIA_TYPE_SUBTITLE:
4248	par->width = codec->width;
4249	par->height = codec->height;
4250	break;
4251	}
4252
4253	if (codec->extradata) {
4254	par->extradata = av_mallocz(codec->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
4255	if (!par->extradata)
4256	return AVERROR(ENOMEM);
4257	memcpy(par->extradata, codec->extradata, codec->extradata_size);
4258	par->extradata_size = codec->extradata_size;
4259	}
4260
4261	return 0;
4262	}
4263
4264	int avcodec_parameters_to_context(AVCodecContext *codec,
4265	const AVCodecParameters *par)
4266	{
4267	codec->codec_type = par->codec_type;
4268	codec->codec_id = par->codec_id;
4269	codec->codec_tag = par->codec_tag;
4270
4271	codec->bit_rate = par->bit_rate;
4272	codec->bits_per_coded_sample = par->bits_per_coded_sample;
4273	codec->bits_per_raw_sample = par->bits_per_raw_sample;
4274	codec->profile = par->profile;
4275	codec->level = par->level;
4276
4277	switch (par->codec_type) {
4278	case AVMEDIA_TYPE_VIDEO:
4279	codec->pix_fmt = par->format;
4280	codec->width = par->width;
4281	codec->height = par->height;
4282	codec->field_order = par->field_order;
4283	codec->color_range = par->color_range;
4284	codec->color_primaries = par->color_primaries;
4285	codec->color_trc = par->color_trc;
4286	codec->colorspace = par->color_space;
4287	codec->chroma_sample_location = par->chroma_location;
4288	codec->sample_aspect_ratio = par->sample_aspect_ratio;
4289	codec->has_b_frames = par->video_delay;
4290	break;
4291	case AVMEDIA_TYPE_AUDIO:
4292	codec->sample_fmt = par->format;
4293	codec->channel_layout = par->channel_layout;
4294	codec->channels = par->channels;
4295	codec->sample_rate = par->sample_rate;
4296	codec->block_align = par->block_align;
4297	codec->frame_size = par->frame_size;
4298	codec->delay =
4299	codec->initial_padding = par->initial_padding;
4300	codec->trailing_padding = par->trailing_padding;
4301	codec->seek_preroll = par->seek_preroll;
4302	break;
4303	case AVMEDIA_TYPE_SUBTITLE:
4304	codec->width = par->width;
4305	codec->height = par->height;
4306	break;
4307	}
4308
4309	if (par->extradata) {
4310	av_freep(&codec->extradata);
4311	codec->extradata = av_mallocz(par->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
4312	if (!codec->extradata)
4313	return AVERROR(ENOMEM);
4314	memcpy(codec->extradata, par->extradata, par->extradata_size);
4315	codec->extradata_size = par->extradata_size;
4316	}
4317
4318	return 0;
4319	}
4320
4321	int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
4322	void **data, size_t *sei_size)
4323	{
4324	AVFrameSideData *side_data = NULL;
4325	uint8_t *sei_data;
4326
4327	if (frame)
4328	side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC);
4329
4330	if (!side_data) {
4331	*data = NULL;
4332	return 0;
4333	}
4334
4335	*sei_size = side_data->size + 11;
4336	*data = av_mallocz(*sei_size + prefix_len);
4337	if (!*data)
4338	return AVERROR(ENOMEM);
4339	sei_data = (uint8_t*)*data + prefix_len;
4340
4341	// country code
4342	sei_data[0] = 181;
4343	sei_data[1] = 0;
4344	sei_data[2] = 49;
4345
4346	/**
4347	* 'GA94' is standard in North America for ATSC, but hard coding
4348	* this style may not be the right thing to do -- other formats
4349	* do exist. This information is not available in the side_data
4350	* so we are going with this right now.
4351	*/
4352	AV_WL32(sei_data + 3, MKTAG('G', 'A', '9', '4'));
4353	sei_data[7] = 3;
4354	sei_data[8] = ((side_data->size/3) & 0x1f) | 0x40;
4355	sei_data[9] = 0;
4356
4357	memcpy(sei_data + 10, side_data->data, side_data->size);
4358
4359	sei_data[side_data->size+10] = 255;
4360
4361	return 0;
4362	}
4363
4364	int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)
4365	{
4366	AVRational framerate = avctx->framerate;
4367	int bits_per_coded_sample = avctx->bits_per_coded_sample;
4368	int64_t bitrate;
4369
4370	if (!(framerate.num && framerate.den))
4371	framerate = av_inv_q(avctx->time_base);
4372	if (!(framerate.num && framerate.den))
4373	return 0;
4374
4375	if (!bits_per_coded_sample) {
4376	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
4377	bits_per_coded_sample = av_get_bits_per_pixel(desc);
4378	}
4379	bitrate = (int64_t)bits_per_coded_sample * avctx->width * avctx->height *
4380	framerate.num / framerate.den;
4381
4382	return bitrate;
4383	}
4384