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utils.c
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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 "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/bprint.h"
32 #include "libavutil/crc.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/samplefmt.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/avassert.h"
39 #include "avcodec.h"
40 #include "dsputil.h"
41 #include "libavutil/opt.h"
42 #include "thread.h"
43 #include "frame_thread_encoder.h"
44 #include "internal.h"
45 #include "bytestream.h"
46 #include <stdlib.h>
47 #include <stdarg.h>
48 #include <limits.h>
49 #include <float.h>
50 
51 volatile int ff_avcodec_locked;
52 static int volatile entangled_thread_counter = 0;
53 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
54 static void *codec_mutex;
55 static void *avformat_mutex;
56 
57 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
58 {
59  if (min_size < *size)
60  return ptr;
61 
62  min_size = FFMAX(17 * min_size / 16 + 32, min_size);
63 
64  ptr = av_realloc(ptr, min_size);
65  /* we could set this to the unmodified min_size but this is safer
66  * if the user lost the ptr and uses NULL now
67  */
68  if (!ptr)
69  min_size = 0;
70 
71  *size = min_size;
72 
73  return ptr;
74 }
75 
76 static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
77 {
78  void **p = ptr;
79  if (min_size < *size)
80  return 0;
81  min_size = FFMAX(17 * min_size / 16 + 32, min_size);
82  av_free(*p);
83  *p = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
84  if (!*p)
85  min_size = 0;
86  *size = min_size;
87  return 1;
88 }
89 
90 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
91 {
92  ff_fast_malloc(ptr, size, min_size, 0);
93 }
94 
95 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
96 {
97  uint8_t **p = ptr;
98  if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
99  av_freep(p);
100  *size = 0;
101  return;
102  }
103  if (!ff_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE, 1))
104  memset(*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
105 }
106 
107 void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
108 {
109  uint8_t **p = ptr;
110  if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
111  av_freep(p);
112  *size = 0;
113  return;
114  }
115  if (!ff_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE, 1))
116  memset(*p, 0, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
117 }
118 
119 /* encoder management */
121 
123 {
124  if (c)
125  return c->next;
126  else
127  return first_avcodec;
128 }
129 
130 static void avcodec_init(void)
131 {
132  static int initialized = 0;
133 
134  if (initialized != 0)
135  return;
136  initialized = 1;
137 
139 }
140 
141 int av_codec_is_encoder(const AVCodec *codec)
142 {
143  return codec && (codec->encode_sub || codec->encode2);
144 }
145 
146 int av_codec_is_decoder(const AVCodec *codec)
147 {
148  return codec && codec->decode;
149 }
150 
152 {
153  AVCodec **p;
154  avcodec_init();
155  p = &first_avcodec;
156  while (*p != NULL)
157  p = &(*p)->next;
158  *p = codec;
159  codec->next = NULL;
160 
161  if (codec->init_static_data)
162  codec->init_static_data(codec);
163 }
164 
166 {
167  return EDGE_WIDTH;
168 }
169 
171 {
172  s->coded_width = width;
173  s->coded_height = height;
174  s->width = -((-width ) >> s->lowres);
175  s->height = -((-height) >> s->lowres);
176 }
177 
178 #define INTERNAL_BUFFER_SIZE (32 + 1)
179 
181  int linesize_align[AV_NUM_DATA_POINTERS])
182 {
183  int i;
184  int w_align = 1;
185  int h_align = 1;
186 
187  switch (s->pix_fmt) {
188  case AV_PIX_FMT_YUV420P:
189  case AV_PIX_FMT_YUYV422:
190  case AV_PIX_FMT_UYVY422:
191  case AV_PIX_FMT_YUV422P:
192  case AV_PIX_FMT_YUV440P:
193  case AV_PIX_FMT_YUV444P:
194  case AV_PIX_FMT_GBRP:
195  case AV_PIX_FMT_GRAY8:
196  case AV_PIX_FMT_GRAY16BE:
197  case AV_PIX_FMT_GRAY16LE:
198  case AV_PIX_FMT_YUVJ420P:
199  case AV_PIX_FMT_YUVJ422P:
200  case AV_PIX_FMT_YUVJ440P:
201  case AV_PIX_FMT_YUVJ444P:
202  case AV_PIX_FMT_YUVA420P:
203  case AV_PIX_FMT_YUVA422P:
204  case AV_PIX_FMT_YUVA444P:
229  case AV_PIX_FMT_GBRP9LE:
230  case AV_PIX_FMT_GBRP9BE:
231  case AV_PIX_FMT_GBRP10LE:
232  case AV_PIX_FMT_GBRP10BE:
233  case AV_PIX_FMT_GBRP12LE:
234  case AV_PIX_FMT_GBRP12BE:
235  case AV_PIX_FMT_GBRP14LE:
236  case AV_PIX_FMT_GBRP14BE:
237  w_align = 16; //FIXME assume 16 pixel per macroblock
238  h_align = 16 * 2; // interlaced needs 2 macroblocks height
239  break;
240  case AV_PIX_FMT_YUV411P:
242  w_align = 32;
243  h_align = 8;
244  break;
245  case AV_PIX_FMT_YUV410P:
246  if (s->codec_id == AV_CODEC_ID_SVQ1) {
247  w_align = 64;
248  h_align = 64;
249  }
250  break;
251  case AV_PIX_FMT_RGB555:
252  if (s->codec_id == AV_CODEC_ID_RPZA) {
253  w_align = 4;
254  h_align = 4;
255  }
256  break;
257  case AV_PIX_FMT_PAL8:
258  case AV_PIX_FMT_BGR8:
259  case AV_PIX_FMT_RGB8:
260  if (s->codec_id == AV_CODEC_ID_SMC) {
261  w_align = 4;
262  h_align = 4;
263  }
264  break;
265  case AV_PIX_FMT_BGR24:
266  if ((s->codec_id == AV_CODEC_ID_MSZH) ||
267  (s->codec_id == AV_CODEC_ID_ZLIB)) {
268  w_align = 4;
269  h_align = 4;
270  }
271  break;
272  default:
273  w_align = 1;
274  h_align = 1;
275  break;
276  }
277 
279  w_align = FFMAX(w_align, 8);
280  }
281 
282  *width = FFALIGN(*width, w_align);
283  *height = FFALIGN(*height, h_align);
284  if (s->codec_id == AV_CODEC_ID_H264 || s->lowres)
285  // some of the optimized chroma MC reads one line too much
286  // which is also done in mpeg decoders with lowres > 0
287  *height += 2;
288 
289  for (i = 0; i < 4; i++)
290  linesize_align[i] = STRIDE_ALIGN;
291 }
292 
294 {
296  int chroma_shift = desc->log2_chroma_w;
297  int linesize_align[AV_NUM_DATA_POINTERS];
298  int align;
299 
300  avcodec_align_dimensions2(s, width, height, linesize_align);
301  align = FFMAX(linesize_align[0], linesize_align[3]);
302  linesize_align[1] <<= chroma_shift;
303  linesize_align[2] <<= chroma_shift;
304  align = FFMAX3(align, linesize_align[1], linesize_align[2]);
305  *width = FFALIGN(*width, align);
306 }
307 
309  enum AVSampleFormat sample_fmt, const uint8_t *buf,
310  int buf_size, int align)
311 {
312  int ch, planar, needed_size, ret = 0;
313 
314  needed_size = av_samples_get_buffer_size(NULL, nb_channels,
315  frame->nb_samples, sample_fmt,
316  align);
317  if (buf_size < needed_size)
318  return AVERROR(EINVAL);
319 
320  planar = av_sample_fmt_is_planar(sample_fmt);
321  if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
322  if (!(frame->extended_data = av_mallocz(nb_channels *
323  sizeof(*frame->extended_data))))
324  return AVERROR(ENOMEM);
325  } else {
326  frame->extended_data = frame->data;
327  }
328 
329  if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
330  (uint8_t *)(intptr_t)buf, nb_channels, frame->nb_samples,
331  sample_fmt, align)) < 0) {
332  if (frame->extended_data != frame->data)
333  av_freep(&frame->extended_data);
334  return ret;
335  }
336  if (frame->extended_data != frame->data) {
337  for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
338  frame->data[ch] = frame->extended_data[ch];
339  }
340 
341  return ret;
342 }
343 
345 {
346  AVCodecInternal *avci = avctx->internal;
347  int buf_size, ret;
348 
349  av_freep(&avci->audio_data);
350  buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
351  frame->nb_samples, avctx->sample_fmt,
352  0);
353  if (buf_size < 0)
354  return AVERROR(EINVAL);
355 
356  frame->data[0] = av_mallocz(buf_size);
357  if (!frame->data[0])
358  return AVERROR(ENOMEM);
359 
360  ret = avcodec_fill_audio_frame(frame, avctx->channels, avctx->sample_fmt,
361  frame->data[0], buf_size, 0);
362  if (ret < 0) {
363  av_freep(&frame->data[0]);
364  return ret;
365  }
366 
367  avci->audio_data = frame->data[0];
368  if (avctx->debug & FF_DEBUG_BUFFERS)
369  av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
370  "internal audio buffer used\n", frame);
371 
372  return 0;
373 }
374 
376 {
377  int i;
378  int w = s->width;
379  int h = s->height;
380  InternalBuffer *buf;
381  AVCodecInternal *avci = s->internal;
382 
383  if (pic->data[0] != NULL) {
384  av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
385  return -1;
386  }
387  if (avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
388  av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
389  return -1;
390  }
391 
392  if (av_image_check_size(w, h, 0, s) || s->pix_fmt<0) {
393  av_log(s, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
394  return -1;
395  }
396 
397  if (!avci->buffer) {
398  avci->buffer = av_mallocz((INTERNAL_BUFFER_SIZE + 1) *
399  sizeof(InternalBuffer));
400  }
401 
402  buf = &avci->buffer[avci->buffer_count];
403 
404  if (buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)) {
405  for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
406  av_freep(&buf->base[i]);
407  buf->data[i] = NULL;
408  }
409  }
410 
411  if (!buf->base[0]) {
412  int h_chroma_shift, v_chroma_shift;
413  int size[4] = { 0 };
414  int tmpsize;
415  int unaligned;
416  AVPicture picture;
417  int stride_align[AV_NUM_DATA_POINTERS];
419  const int pixel_size = desc->comp[0].step_minus1 + 1;
420 
421  av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift,
422  &v_chroma_shift);
423 
424  avcodec_align_dimensions2(s, &w, &h, stride_align);
425 
426  if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
427  w += EDGE_WIDTH * 2;
428  h += EDGE_WIDTH * 2;
429  }
430 
431  do {
432  // NOTE: do not align linesizes individually, this breaks e.g. assumptions
433  // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
434  av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
435  // increase alignment of w for next try (rhs gives the lowest bit set in w)
436  w += w & ~(w - 1);
437 
438  unaligned = 0;
439  for (i = 0; i < 4; i++)
440  unaligned |= picture.linesize[i] % stride_align[i];
441  } while (unaligned);
442 
443  tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
444  if (tmpsize < 0)
445  return -1;
446 
447  for (i = 0; i < 3 && picture.data[i + 1]; i++)
448  size[i] = picture.data[i + 1] - picture.data[i];
449  size[i] = tmpsize - (picture.data[i] - picture.data[0]);
450 
451  memset(buf->base, 0, sizeof(buf->base));
452  memset(buf->data, 0, sizeof(buf->data));
453 
454  for (i = 0; i < 4 && size[i]; i++) {
455  const int h_shift = i == 0 ? 0 : h_chroma_shift;
456  const int v_shift = i == 0 ? 0 : v_chroma_shift;
457 
458  buf->linesize[i] = picture.linesize[i];
459 
460  buf->base[i] = av_malloc(size[i] + 16); //FIXME 16
461  if (buf->base[i] == NULL)
462  return AVERROR(ENOMEM);
463  memset(buf->base[i], 128, size[i]);
464 
465  // no edge if EDGE EMU or not planar YUV
466  if ((s->flags & CODEC_FLAG_EMU_EDGE) || !size[2])
467  buf->data[i] = buf->base[i];
468  else
469  buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i] * EDGE_WIDTH >> v_shift) + (pixel_size * EDGE_WIDTH >> h_shift), stride_align[i]);
470  }
471  for (; i < AV_NUM_DATA_POINTERS; i++) {
472  buf->base[i] = buf->data[i] = NULL;
473  buf->linesize[i] = 0;
474  }
475  if (size[1] && !size[2])
476  avpriv_set_systematic_pal2((uint32_t *)buf->data[1], s->pix_fmt);
477  buf->width = s->width;
478  buf->height = s->height;
479  buf->pix_fmt = s->pix_fmt;
480  }
481 
482  for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
483  pic->base[i] = buf->base[i];
484  pic->data[i] = buf->data[i];
485  pic->linesize[i] = buf->linesize[i];
486  }
487  pic->extended_data = pic->data;
488  avci->buffer_count++;
489 
490  if (s->debug & FF_DEBUG_BUFFERS)
491  av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d "
492  "buffers used\n", pic, avci->buffer_count);
493 
494  return 0;
495 }
496 
498 {
499  frame->type = FF_BUFFER_TYPE_INTERNAL;
500  switch (avctx->codec_type) {
501  case AVMEDIA_TYPE_VIDEO:
502  return video_get_buffer(avctx, frame);
503  case AVMEDIA_TYPE_AUDIO:
504  return audio_get_buffer(avctx, frame);
505  default:
506  return -1;
507  }
508 }
509 
511 {
512  if (s->pkt) {
513  frame->pkt_pts = s->pkt->pts;
514  frame->pkt_pos = s->pkt->pos;
515  frame->pkt_duration = s->pkt->duration;
516  frame->pkt_size = s->pkt->size;
517  } else {
518  frame->pkt_pts = AV_NOPTS_VALUE;
519  frame->pkt_pos = -1;
520  frame->pkt_duration = 0;
521  frame->pkt_size = -1;
522  }
524 
525  switch (s->codec->type) {
526  case AVMEDIA_TYPE_VIDEO:
527  frame->width = s->width;
528  frame->height = s->height;
529  frame->format = s->pix_fmt;
531  break;
532  case AVMEDIA_TYPE_AUDIO:
533  frame->sample_rate = s->sample_rate;
534  frame->format = s->sample_fmt;
535  frame->channel_layout = s->channel_layout;
536  frame->channels = s->channels;
537  break;
538  }
539 }
540 
542 {
543  ff_init_buffer_info(avctx, frame);
544 
545  return avctx->get_buffer(avctx, frame);
546 }
547 
549 {
550  int i;
551  InternalBuffer *buf, *last;
552  AVCodecInternal *avci = s->internal;
553 
555 
556  assert(pic->type == FF_BUFFER_TYPE_INTERNAL);
557  assert(avci->buffer_count);
558 
559  if (avci->buffer) {
560  buf = NULL; /* avoids warning */
561  for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
562  buf = &avci->buffer[i];
563  if (buf->data[0] == pic->data[0])
564  break;
565  }
566  av_assert0(i < avci->buffer_count);
567  avci->buffer_count--;
568  last = &avci->buffer[avci->buffer_count];
569 
570  if (buf != last)
571  FFSWAP(InternalBuffer, *buf, *last);
572  }
573 
574  for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
575  pic->data[i] = NULL;
576 // pic->base[i]=NULL;
577 
578  if (s->debug & FF_DEBUG_BUFFERS)
579  av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d "
580  "buffers used\n", pic, avci->buffer_count);
581 }
582 
584 {
585  AVFrame temp_pic;
586  int i, ret;
587 
589 
590  if (pic->data[0] && (pic->width != s->width || pic->height != s->height || pic->format != s->pix_fmt)) {
591  av_log(s, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
593  s->release_buffer(s, pic);
594  }
595 
596  ff_init_buffer_info(s, pic);
597 
598  /* If no picture return a new buffer */
599  if (pic->data[0] == NULL) {
600  /* We will copy from buffer, so must be readable */
602  return ff_get_buffer(s, pic);
603  }
604 
605  assert(s->pix_fmt == pic->format);
606 
607  /* If internal buffer type return the same buffer */
608  if (pic->type == FF_BUFFER_TYPE_INTERNAL) {
609  return 0;
610  }
611 
612  /*
613  * Not internal type and reget_buffer not overridden, emulate cr buffer
614  */
615  temp_pic = *pic;
616  for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
617  pic->data[i] = pic->base[i] = NULL;
618  pic->opaque = NULL;
619  /* Allocate new frame */
620  if ((ret = ff_get_buffer(s, pic)))
621  return ret;
622  /* Copy image data from old buffer to new buffer */
623  av_picture_copy((AVPicture *)pic, (AVPicture *)&temp_pic, s->pix_fmt, s->width,
624  s->height);
625  s->release_buffer(s, &temp_pic); // Release old frame
626  return 0;
627 }
628 
629 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
630 {
631  int i;
632 
633  for (i = 0; i < count; i++) {
634  int r = func(c, (char *)arg + i * size);
635  if (ret)
636  ret[i] = r;
637  }
638  return 0;
639 }
640 
641 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
642 {
643  int i;
644 
645  for (i = 0; i < count; i++) {
646  int r = func(c, arg, i, 0);
647  if (ret)
648  ret[i] = r;
649  }
650  return 0;
651 }
652 
654 {
655  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
656  return desc->flags & PIX_FMT_HWACCEL;
657 }
658 
660 {
661  while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
662  ++fmt;
663  return fmt[0];
664 }
665 
667 {
668 #if LIBAVCODEC_VERSION_MAJOR >= 55
669  // extended_data should explicitly be freed when needed, this code is unsafe currently
670  // also this is not compatible to the <55 ABI/API
671  if (frame->extended_data != frame->data && 0)
672  av_freep(&frame->extended_data);
673 #endif
674 
675  memset(frame, 0, sizeof(AVFrame));
676 
677  frame->pts =
678  frame->pkt_dts =
679  frame->pkt_pts =
681  frame->pkt_duration = 0;
682  frame->pkt_pos = -1;
683  frame->pkt_size = -1;
684  frame->key_frame = 1;
685  frame->sample_aspect_ratio = (AVRational) {0, 1 };
686  frame->format = -1; /* unknown */
687  frame->extended_data = frame->data;
688 }
689 
691 {
692  AVFrame *frame = av_malloc(sizeof(AVFrame));
693 
694  if (frame == NULL)
695  return NULL;
696 
697  frame->extended_data = NULL;
699 
700  return frame;
701 }
702 
704 {
705  AVFrame *f;
706 
707  if (!frame || !*frame)
708  return;
709 
710  f = *frame;
711 
712  if (f->extended_data != f->data)
713  av_freep(&f->extended_data);
714 
715  av_freep(frame);
716 }
717 
718 #define MAKE_ACCESSORS(str, name, type, field) \
719  type av_##name##_get_##field(const str *s) { return s->field; } \
720  void av_##name##_set_##field(str *s, type v) { s->field = v; }
721 
722 MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp)
723 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration)
724 MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos)
725 MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout)
726 MAKE_ACCESSORS(AVFrame, frame, int, channels)
727 MAKE_ACCESSORS(AVFrame, frame, int, sample_rate)
728 MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
729 MAKE_ACCESSORS(AVFrame, frame, int, decode_error_flags)
730 MAKE_ACCESSORS(AVFrame, frame, int, pkt_size)
731 
732 MAKE_ACCESSORS(AVCodecContext, codec, AVRational, pkt_timebase)
733 MAKE_ACCESSORS(AVCodecContext, codec, const AVCodecDescriptor *, codec_descriptor)
734 
736 {
737  memset(sub, 0, sizeof(*sub));
738  sub->pts = AV_NOPTS_VALUE;
739 }
740 
741 static int get_bit_rate(AVCodecContext *ctx)
742 {
743  int bit_rate;
744  int bits_per_sample;
745 
746  switch (ctx->codec_type) {
747  case AVMEDIA_TYPE_VIDEO:
748  case AVMEDIA_TYPE_DATA:
751  bit_rate = ctx->bit_rate;
752  break;
753  case AVMEDIA_TYPE_AUDIO:
754  bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
755  bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
756  break;
757  default:
758  bit_rate = 0;
759  break;
760  }
761  return bit_rate;
762 }
763 
764 #if FF_API_AVCODEC_OPEN
765 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
766 {
767  return avcodec_open2(avctx, codec, NULL);
768 }
769 #endif
770 
772 {
773  int ret = 0;
774 
776 
777  ret = avcodec_open2(avctx, codec, options);
778 
779  ff_lock_avcodec(avctx);
780  return ret;
781 }
782 
784 {
785  int ret = 0;
786  AVDictionary *tmp = NULL;
787 
788  if (avcodec_is_open(avctx))
789  return 0;
790 
791  if ((!codec && !avctx->codec)) {
792  av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
793  return AVERROR(EINVAL);
794  }
795  if ((codec && avctx->codec && codec != avctx->codec)) {
796  av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
797  "but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
798  return AVERROR(EINVAL);
799  }
800  if (!codec)
801  codec = avctx->codec;
802 
803  if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
804  return AVERROR(EINVAL);
805 
806  if (options)
807  av_dict_copy(&tmp, *options, 0);
808 
809  ret = ff_lock_avcodec(avctx);
810  if (ret < 0)
811  return ret;
812 
813  avctx->internal = av_mallocz(sizeof(AVCodecInternal));
814  if (!avctx->internal) {
815  ret = AVERROR(ENOMEM);
816  goto end;
817  }
818 
819  if (codec->priv_data_size > 0) {
820  if (!avctx->priv_data) {
821  avctx->priv_data = av_mallocz(codec->priv_data_size);
822  if (!avctx->priv_data) {
823  ret = AVERROR(ENOMEM);
824  goto end;
825  }
826  if (codec->priv_class) {
827  *(const AVClass **)avctx->priv_data = codec->priv_class;
829  }
830  }
831  if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
832  goto free_and_end;
833  } else {
834  avctx->priv_data = NULL;
835  }
836  if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
837  goto free_and_end;
838 
839  //We only call avcodec_set_dimensions() for non h264 codecs so as not to overwrite previously setup dimensions
840  if (!( avctx->coded_width && avctx->coded_height && avctx->width && avctx->height && avctx->codec_id == AV_CODEC_ID_H264)){
841 
842  if (avctx->coded_width && avctx->coded_height)
843  avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
844  else if (avctx->width && avctx->height)
845  avcodec_set_dimensions(avctx, avctx->width, avctx->height);
846  }
847 
848  if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
849  && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
850  || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
851  av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
852  avcodec_set_dimensions(avctx, 0, 0);
853  }
854 
855  /* if the decoder init function was already called previously,
856  * free the already allocated subtitle_header before overwriting it */
857  if (av_codec_is_decoder(codec))
858  av_freep(&avctx->subtitle_header);
859 
860  if (avctx->channels > FF_SANE_NB_CHANNELS) {
861  ret = AVERROR(EINVAL);
862  goto free_and_end;
863  }
864 
865  avctx->codec = codec;
866  if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
867  avctx->codec_id == AV_CODEC_ID_NONE) {
868  avctx->codec_type = codec->type;
869  avctx->codec_id = codec->id;
870  }
871  if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
872  && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
873  av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
874  ret = AVERROR(EINVAL);
875  goto free_and_end;
876  }
877  avctx->frame_number = 0;
879 
880  if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
882  const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
883  AVCodec *codec2;
885  "The %s '%s' is experimental but experimental codecs are not enabled, "
886  "add '-strict %d' if you want to use it.\n",
887  codec_string, codec->name, FF_COMPLIANCE_EXPERIMENTAL);
888  codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
889  if (!(codec2->capabilities & CODEC_CAP_EXPERIMENTAL))
890  av_log(NULL, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
891  codec_string, codec2->name);
892  ret = AVERROR_EXPERIMENTAL;
893  goto free_and_end;
894  }
895 
896  if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
897  (!avctx->time_base.num || !avctx->time_base.den)) {
898  avctx->time_base.num = 1;
899  avctx->time_base.den = avctx->sample_rate;
900  }
901 
902  if (!HAVE_THREADS)
903  av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");
904 
905  if (HAVE_THREADS) {
906  ff_unlock_avcodec(); //we will instanciate a few encoders thus kick the counter to prevent false detection of a problem
907  ret = ff_frame_thread_encoder_init(avctx, options ? *options : NULL);
908  ff_lock_avcodec(avctx);
909  if (ret < 0)
910  goto free_and_end;
911  }
912 
913  if (HAVE_THREADS && !avctx->thread_opaque
915  ret = ff_thread_init(avctx);
916  if (ret < 0) {
917  goto free_and_end;
918  }
919  }
920  if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
921  avctx->thread_count = 1;
922 
923  if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
924  av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
925  avctx->codec->max_lowres);
926  ret = AVERROR(EINVAL);
927  goto free_and_end;
928  }
929 
930  if (av_codec_is_encoder(avctx->codec)) {
931  int i;
932  if (avctx->codec->sample_fmts) {
933  for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
934  if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
935  break;
936  if (avctx->channels == 1 &&
939  avctx->sample_fmt = avctx->codec->sample_fmts[i];
940  break;
941  }
942  }
943  if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
944  char buf[128];
945  snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
946  av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
947  (char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
948  ret = AVERROR(EINVAL);
949  goto free_and_end;
950  }
951  }
952  if (avctx->codec->pix_fmts) {
953  for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
954  if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
955  break;
956  if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE
957  && !((avctx->codec_id == AV_CODEC_ID_MJPEG || avctx->codec_id == AV_CODEC_ID_LJPEG)
959  char buf[128];
960  snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
961  av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
962  (char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
963  ret = AVERROR(EINVAL);
964  goto free_and_end;
965  }
966  }
967  if (avctx->codec->supported_samplerates) {
968  for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
969  if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
970  break;
971  if (avctx->codec->supported_samplerates[i] == 0) {
972  av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
973  avctx->sample_rate);
974  ret = AVERROR(EINVAL);
975  goto free_and_end;
976  }
977  }
978  if (avctx->codec->channel_layouts) {
979  if (!avctx->channel_layout) {
980  av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
981  } else {
982  for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
983  if (avctx->channel_layout == avctx->codec->channel_layouts[i])
984  break;
985  if (avctx->codec->channel_layouts[i] == 0) {
986  char buf[512];
987  av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
988  av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
989  ret = AVERROR(EINVAL);
990  goto free_and_end;
991  }
992  }
993  }
994  if (avctx->channel_layout && avctx->channels) {
995  int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
996  if (channels != avctx->channels) {
997  char buf[512];
998  av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
999  av_log(avctx, AV_LOG_ERROR,
1000  "Channel layout '%s' with %d channels does not match number of specified channels %d\n",
1001  buf, channels, avctx->channels);
1002  ret = AVERROR(EINVAL);
1003  goto free_and_end;
1004  }
1005  } else if (avctx->channel_layout) {
1007  }
1008  if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
1009  avctx->codec_id != AV_CODEC_ID_PNG // For mplayer
1010  ) {
1011  if (avctx->width <= 0 || avctx->height <= 0) {
1012  av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
1013  ret = AVERROR(EINVAL);
1014  goto free_and_end;
1015  }
1016  }
1017  if ( (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
1018  && avctx->bit_rate>0 && avctx->bit_rate<1000) {
1019  av_log(avctx, AV_LOG_WARNING, "Bitrate %d is extreemly low, did you mean %dk\n", avctx->bit_rate, avctx->bit_rate);
1020  }
1021 
1022  if (!avctx->rc_initial_buffer_occupancy)
1023  avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
1024  }
1025 
1027  avctx->pts_correction_num_faulty_dts = 0;
1028  avctx->pts_correction_last_pts =
1029  avctx->pts_correction_last_dts = INT64_MIN;
1030 
1031  if ( avctx->codec->init && (!(avctx->active_thread_type&FF_THREAD_FRAME)
1032  || avctx->internal->frame_thread_encoder)) {
1033  ret = avctx->codec->init(avctx);
1034  if (ret < 0) {
1035  goto free_and_end;
1036  }
1037  }
1038 
1039  ret=0;
1040 
1041  if (av_codec_is_decoder(avctx->codec)) {
1042  if (!avctx->bit_rate)
1043  avctx->bit_rate = get_bit_rate(avctx);
1044  /* validate channel layout from the decoder */
1045  if (avctx->channel_layout) {
1046  int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
1047  if (!avctx->channels)
1048  avctx->channels = channels;
1049  else if (channels != avctx->channels) {
1050  char buf[512];
1051  av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
1052  av_log(avctx, AV_LOG_WARNING,
1053  "Channel layout '%s' with %d channels does not match specified number of channels %d: "
1054  "ignoring specified channel layout\n",
1055  buf, channels, avctx->channels);
1056  avctx->channel_layout = 0;
1057  }
1058  }
1059  if (avctx->channels && avctx->channels < 0 ||
1060  avctx->channels > FF_SANE_NB_CHANNELS) {
1061  ret = AVERROR(EINVAL);
1062  goto free_and_end;
1063  }
1064  }
1065 end:
1067  if (options) {
1068  av_dict_free(options);
1069  *options = tmp;
1070  }
1071 
1072  return ret;
1073 free_and_end:
1074  av_dict_free(&tmp);
1075  av_freep(&avctx->priv_data);
1076  av_freep(&avctx->internal);
1077  avctx->codec = NULL;
1078  goto end;
1079 }
1080 
1082 {
1083  if (size < 0 || avpkt->size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
1084  av_log(avctx, AV_LOG_ERROR, "Size %d invalid\n", size);
1085  return AVERROR(EINVAL);
1086  }
1087 
1088  if (avctx) {
1089  av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
1090  if (!avpkt->data || avpkt->size < size) {
1092  avpkt->data = avctx->internal->byte_buffer;
1093  avpkt->size = avctx->internal->byte_buffer_size;
1094  avpkt->destruct = NULL;
1095  }
1096  }
1097 
1098  if (avpkt->data) {
1099  void *destruct = avpkt->destruct;
1100 
1101  if (avpkt->size < size) {
1102  av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %d)\n", avpkt->size, size);
1103  return AVERROR(EINVAL);
1104  }
1105 
1106  av_init_packet(avpkt);
1107  avpkt->destruct = destruct;
1108  avpkt->size = size;
1109  return 0;
1110  } else {
1111  int ret = av_new_packet(avpkt, size);
1112  if (ret < 0)
1113  av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", size);
1114  return ret;
1115  }
1116 }
1117 
1119 {
1120  return ff_alloc_packet2(NULL, avpkt, size);
1121 }
1122 
1123 /**
1124  * Pad last frame with silence.
1125  */
1126 static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
1127 {
1128  AVFrame *frame = NULL;
1129  uint8_t *buf = NULL;
1130  int ret;
1131 
1132  if (!(frame = avcodec_alloc_frame()))
1133  return AVERROR(ENOMEM);
1134  *frame = *src;
1135 
1136  if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
1137  s->frame_size, s->sample_fmt, 0)) < 0)
1138  goto fail;
1139 
1140  if (!(buf = av_malloc(ret))) {
1141  ret = AVERROR(ENOMEM);
1142  goto fail;
1143  }
1144 
1145  frame->nb_samples = s->frame_size;
1146  if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
1147  buf, ret, 0)) < 0)
1148  goto fail;
1149  if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
1150  src->nb_samples, s->channels, s->sample_fmt)) < 0)
1151  goto fail;
1152  if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
1153  frame->nb_samples - src->nb_samples,
1154  s->channels, s->sample_fmt)) < 0)
1155  goto fail;
1156 
1157  *dst = frame;
1158 
1159  return 0;
1160 
1161 fail:
1162  if (frame->extended_data != frame->data)
1163  av_freep(&frame->extended_data);
1164  av_freep(&buf);
1165  av_freep(&frame);
1166  return ret;
1167 }
1168 
1170  AVPacket *avpkt,
1171  const AVFrame *frame,
1172  int *got_packet_ptr)
1173 {
1174  AVFrame tmp;
1175  AVFrame *padded_frame = NULL;
1176  int ret;
1177  AVPacket user_pkt = *avpkt;
1178  int needs_realloc = !user_pkt.data;
1179 
1180  *got_packet_ptr = 0;
1181 
1182  if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1183  av_free_packet(avpkt);
1184  av_init_packet(avpkt);
1185  return 0;
1186  }
1187 
1188  /* ensure that extended_data is properly set */
1189  if (frame && !frame->extended_data) {
1190  if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
1191  avctx->channels > AV_NUM_DATA_POINTERS) {
1192  av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
1193  "with more than %d channels, but extended_data is not set.\n",
1195  return AVERROR(EINVAL);
1196  }
1197  av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
1198 
1199  tmp = *frame;
1200  tmp.extended_data = tmp.data;
1201  frame = &tmp;
1202  }
1203 
1204  /* check for valid frame size */
1205  if (frame) {
1207  if (frame->nb_samples > avctx->frame_size) {
1208  av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
1209  return AVERROR(EINVAL);
1210  }
1211  } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
1212  if (frame->nb_samples < avctx->frame_size &&
1213  !avctx->internal->last_audio_frame) {
1214  ret = pad_last_frame(avctx, &padded_frame, frame);
1215  if (ret < 0)
1216  return ret;
1217 
1218  frame = padded_frame;
1219  avctx->internal->last_audio_frame = 1;
1220  }
1221 
1222  if (frame->nb_samples != avctx->frame_size) {
1223  av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
1224  ret = AVERROR(EINVAL);
1225  goto end;
1226  }
1227  }
1228  }
1229 
1230  ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1231  if (!ret) {
1232  if (*got_packet_ptr) {
1233  if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
1234  if (avpkt->pts == AV_NOPTS_VALUE)
1235  avpkt->pts = frame->pts;
1236  if (!avpkt->duration)
1237  avpkt->duration = ff_samples_to_time_base(avctx,
1238  frame->nb_samples);
1239  }
1240  avpkt->dts = avpkt->pts;
1241  } else {
1242  avpkt->size = 0;
1243  }
1244  }
1245  if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
1246  needs_realloc = 0;
1247  if (user_pkt.data) {
1248  if (user_pkt.size >= avpkt->size) {
1249  memcpy(user_pkt.data, avpkt->data, avpkt->size);
1250  } else {
1251  av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
1252  avpkt->size = user_pkt.size;
1253  ret = -1;
1254  }
1255  avpkt->data = user_pkt.data;
1256  avpkt->destruct = user_pkt.destruct;
1257  } else {
1258  if (av_dup_packet(avpkt) < 0) {
1259  ret = AVERROR(ENOMEM);
1260  }
1261  }
1262  }
1263 
1264  if (!ret) {
1265  if (needs_realloc && avpkt->data) {
1266  uint8_t *new_data = av_realloc(avpkt->data, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
1267  if (new_data)
1268  avpkt->data = new_data;
1269  }
1270 
1271  avctx->frame_number++;
1272  }
1273 
1274  if (ret < 0 || !*got_packet_ptr) {
1275  av_free_packet(avpkt);
1276  av_init_packet(avpkt);
1277  goto end;
1278  }
1279 
1280  /* NOTE: if we add any audio encoders which output non-keyframe packets,
1281  * this needs to be moved to the encoders, but for now we can do it
1282  * here to simplify things */
1283  avpkt->flags |= AV_PKT_FLAG_KEY;
1284 
1285 end:
1286  if (padded_frame) {
1287  av_freep(&padded_frame->data[0]);
1288  if (padded_frame->extended_data != padded_frame->data)
1289  av_freep(&padded_frame->extended_data);
1290  av_freep(&padded_frame);
1291  }
1292 
1293  return ret;
1294 }
1295 
1296 #if FF_API_OLD_ENCODE_AUDIO
1297 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
1298  uint8_t *buf, int buf_size,
1299  const short *samples)
1300 {
1301  AVPacket pkt;
1302  AVFrame frame0 = { { 0 } };
1303  AVFrame *frame;
1304  int ret, samples_size, got_packet;
1305 
1306  av_init_packet(&pkt);
1307  pkt.data = buf;
1308  pkt.size = buf_size;
1309 
1310  if (samples) {
1311  frame = &frame0;
1313 
1314  if (avctx->frame_size) {
1315  frame->nb_samples = avctx->frame_size;
1316  } else {
1317  /* if frame_size is not set, the number of samples must be
1318  * calculated from the buffer size */
1319  int64_t nb_samples;
1320  if (!av_get_bits_per_sample(avctx->codec_id)) {
1321  av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
1322  "support this codec\n");
1323  return AVERROR(EINVAL);
1324  }
1325  nb_samples = (int64_t)buf_size * 8 /
1326  (av_get_bits_per_sample(avctx->codec_id) *
1327  avctx->channels);
1328  if (nb_samples >= INT_MAX)
1329  return AVERROR(EINVAL);
1330  frame->nb_samples = nb_samples;
1331  }
1332 
1333  /* it is assumed that the samples buffer is large enough based on the
1334  * relevant parameters */
1335  samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
1336  frame->nb_samples,
1337  avctx->sample_fmt, 1);
1338  if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
1339  avctx->sample_fmt,
1340  (const uint8_t *)samples,
1341  samples_size, 1)) < 0)
1342  return ret;
1343 
1344  /* fabricate frame pts from sample count.
1345  * this is needed because the avcodec_encode_audio() API does not have
1346  * a way for the user to provide pts */
1347  if (avctx->sample_rate && avctx->time_base.num)
1348  frame->pts = ff_samples_to_time_base(avctx,
1349  avctx->internal->sample_count);
1350  else
1351  frame->pts = AV_NOPTS_VALUE;
1352  avctx->internal->sample_count += frame->nb_samples;
1353  } else {
1354  frame = NULL;
1355  }
1356 
1357  got_packet = 0;
1358  ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
1359  if (!ret && got_packet && avctx->coded_frame) {
1360  avctx->coded_frame->pts = pkt.pts;
1361  avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1362  }
1363  /* free any side data since we cannot return it */
1365 
1366  if (frame && frame->extended_data != frame->data)
1367  av_freep(&frame->extended_data);
1368 
1369  return ret ? ret : pkt.size;
1370 }
1371 
1372 #endif
1373 
1374 #if FF_API_OLD_ENCODE_VIDEO
1375 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1376  const AVFrame *pict)
1377 {
1378  AVPacket pkt;
1379  int ret, got_packet = 0;
1380 
1381  if (buf_size < FF_MIN_BUFFER_SIZE) {
1382  av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
1383  return -1;
1384  }
1385 
1386  av_init_packet(&pkt);
1387  pkt.data = buf;
1388  pkt.size = buf_size;
1389 
1390  ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
1391  if (!ret && got_packet && avctx->coded_frame) {
1392  avctx->coded_frame->pts = pkt.pts;
1393  avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1394  }
1395 
1396  /* free any side data since we cannot return it */
1397  if (pkt.side_data_elems > 0) {
1398  int i;
1399  for (i = 0; i < pkt.side_data_elems; i++)
1400  av_free(pkt.side_data[i].data);
1401  av_freep(&pkt.side_data);
1402  pkt.side_data_elems = 0;
1403  }
1404 
1405  return ret ? ret : pkt.size;
1406 }
1407 
1408 #endif
1409 
1411  AVPacket *avpkt,
1412  const AVFrame *frame,
1413  int *got_packet_ptr)
1414 {
1415  int ret;
1416  AVPacket user_pkt = *avpkt;
1417  int needs_realloc = !user_pkt.data;
1418 
1419  *got_packet_ptr = 0;
1420 
1421  if(HAVE_THREADS && avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))
1422  return ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
1423 
1424  if ((avctx->flags&CODEC_FLAG_PASS1) && avctx->stats_out)
1425  avctx->stats_out[0] = '\0';
1426 
1427  if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
1428  av_free_packet(avpkt);
1429  av_init_packet(avpkt);
1430  avpkt->size = 0;
1431  return 0;
1432  }
1433 
1434  if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
1435  return AVERROR(EINVAL);
1436 
1437  av_assert0(avctx->codec->encode2);
1438 
1439  ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
1440  av_assert0(ret <= 0);
1441 
1442  if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
1443  needs_realloc = 0;
1444  if (user_pkt.data) {
1445  if (user_pkt.size >= avpkt->size) {
1446  memcpy(user_pkt.data, avpkt->data, avpkt->size);
1447  } else {
1448  av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
1449  avpkt->size = user_pkt.size;
1450  ret = -1;
1451  }
1452  avpkt->data = user_pkt.data;
1453  avpkt->destruct = user_pkt.destruct;
1454  } else {
1455  if (av_dup_packet(avpkt) < 0) {
1456  ret = AVERROR(ENOMEM);
1457  }
1458  }
1459  }
1460 
1461  if (!ret) {
1462  if (!*got_packet_ptr)
1463  avpkt->size = 0;
1464  else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
1465  avpkt->pts = avpkt->dts = frame->pts;
1466 
1467  if (needs_realloc && avpkt->data &&
1468  avpkt->destruct == av_destruct_packet) {
1469  uint8_t *new_data = av_realloc(avpkt->data, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
1470  if (new_data)
1471  avpkt->data = new_data;
1472  }
1473 
1474  avctx->frame_number++;
1475  }
1476 
1477  if (ret < 0 || !*got_packet_ptr)
1478  av_free_packet(avpkt);
1479 
1480  emms_c();
1481  return ret;
1482 }
1483 
1484 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1485  const AVSubtitle *sub)
1486 {
1487  int ret;
1488  if (sub->start_display_time) {
1489  av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1490  return -1;
1491  }
1492 
1493  ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
1494  avctx->frame_number++;
1495  return ret;
1496 }
1497 
1498 /**
1499  * Attempt to guess proper monotonic timestamps for decoded video frames
1500  * which might have incorrect times. Input timestamps may wrap around, in
1501  * which case the output will as well.
1502  *
1503  * @param pts the pts field of the decoded AVPacket, as passed through
1504  * AVFrame.pkt_pts
1505  * @param dts the dts field of the decoded AVPacket
1506  * @return one of the input values, may be AV_NOPTS_VALUE
1507  */
1508 static int64_t guess_correct_pts(AVCodecContext *ctx,
1509  int64_t reordered_pts, int64_t dts)
1510 {
1511  int64_t pts = AV_NOPTS_VALUE;
1512 
1513  if (dts != AV_NOPTS_VALUE) {
1515  ctx->pts_correction_last_dts = dts;
1516  }
1517  if (reordered_pts != AV_NOPTS_VALUE) {
1518  ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
1519  ctx->pts_correction_last_pts = reordered_pts;
1520  }
1522  && reordered_pts != AV_NOPTS_VALUE)
1523  pts = reordered_pts;
1524  else
1525  pts = dts;
1526 
1527  return pts;
1528 }
1529 
1530 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1531 {
1532  int size = 0;
1533  const uint8_t *data;
1534  uint32_t flags;
1535 
1536  if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1537  return;
1538 
1539  data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1540  if (!data || size < 4)
1541  return;
1542  flags = bytestream_get_le32(&data);
1543  size -= 4;
1544  if (size < 4) /* Required for any of the changes */
1545  return;
1547  avctx->channels = bytestream_get_le32(&data);
1548  size -= 4;
1549  }
1551  if (size < 8)
1552  return;
1553  avctx->channel_layout = bytestream_get_le64(&data);
1554  size -= 8;
1555  }
1556  if (size < 4)
1557  return;
1559  avctx->sample_rate = bytestream_get_le32(&data);
1560  size -= 4;
1561  }
1563  if (size < 8)
1564  return;
1565  avctx->width = bytestream_get_le32(&data);
1566  avctx->height = bytestream_get_le32(&data);
1567  avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1568  size -= 8;
1569  }
1570 }
1571 
1573 {
1574  int size, ret = 0;
1575  const uint8_t *side_metadata;
1576  const uint8_t *end;
1577 
1578  av_dict_free(&avctx->metadata);
1579  side_metadata = av_packet_get_side_data(avctx->pkt,
1581  if (!side_metadata)
1582  goto end;
1583  end = side_metadata + size;
1584  while (side_metadata < end) {
1585  const uint8_t *key = side_metadata;
1586  const uint8_t *val = side_metadata + strlen(key) + 1;
1587  int ret = av_dict_set(&frame->metadata, key, val, 0);
1588  if (ret < 0)
1589  break;
1590  side_metadata = val + strlen(val) + 1;
1591  }
1592 end:
1593  avctx->metadata = frame->metadata;
1594  return ret;
1595 }
1596 
1598  int *got_picture_ptr,
1599  const AVPacket *avpkt)
1600 {
1601  int ret;
1602  // copy to ensure we do not change avpkt
1603  AVPacket tmp = *avpkt;
1604 
1605  if (avctx->codec->type != AVMEDIA_TYPE_VIDEO) {
1606  av_log(avctx, AV_LOG_ERROR, "Invalid media type for video\n");
1607  return AVERROR(EINVAL);
1608  }
1609 
1610  *got_picture_ptr = 0;
1611  if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1612  return AVERROR(EINVAL);
1613 
1614  avcodec_get_frame_defaults(picture);
1615 
1616  if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
1617  int did_split = av_packet_split_side_data(&tmp);
1618  apply_param_change(avctx, &tmp);
1619  avctx->pkt = &tmp;
1620  if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
1621  ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1622  &tmp);
1623  else {
1624  ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1625  &tmp);
1626  picture->pkt_dts = avpkt->dts;
1627 
1628  if(!avctx->has_b_frames){
1629  picture->pkt_pos = avpkt->pos;
1630  }
1631  //FIXME these should be under if(!avctx->has_b_frames)
1632  /* get_buffer is supposed to set frame parameters */
1633  if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
1634  if (!picture->sample_aspect_ratio.num) picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1635  if (!picture->width) picture->width = avctx->width;
1636  if (!picture->height) picture->height = avctx->height;
1637  if (picture->format == AV_PIX_FMT_NONE) picture->format = avctx->pix_fmt;
1638  }
1639  }
1640  add_metadata_from_side_data(avctx, picture);
1641 
1642  emms_c(); //needed to avoid an emms_c() call before every return;
1643 
1644  avctx->pkt = NULL;
1645  if (did_split) {
1647  if(ret == tmp.size)
1648  ret = avpkt->size;
1649  }
1650 
1651  if (*got_picture_ptr){
1652  avctx->frame_number++;
1653  picture->best_effort_timestamp = guess_correct_pts(avctx,
1654  picture->pkt_pts,
1655  picture->pkt_dts);
1656  }
1657  } else
1658  ret = 0;
1659 
1660  /* many decoders assign whole AVFrames, thus overwriting extended_data;
1661  * make sure it's set correctly */
1662  picture->extended_data = picture->data;
1663 
1664  return ret;
1665 }
1666 
1667 #if FF_API_OLD_DECODE_AUDIO
1668 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
1669  int *frame_size_ptr,
1670  AVPacket *avpkt)
1671 {
1672  AVFrame frame = { { 0 } };
1673  int ret, got_frame = 0;
1674 
1675  if (avctx->get_buffer != avcodec_default_get_buffer) {
1676  av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
1677  "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
1678  av_log(avctx, AV_LOG_ERROR, "Please port your application to "
1679  "avcodec_decode_audio4()\n");
1682  }
1683 
1684  ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
1685 
1686  if (ret >= 0 && got_frame) {
1687  int ch, plane_size;
1688  int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
1689  int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
1690  frame.nb_samples,
1691  avctx->sample_fmt, 1);
1692  if (*frame_size_ptr < data_size) {
1693  av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
1694  "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
1695  return AVERROR(EINVAL);
1696  }
1697 
1698  memcpy(samples, frame.extended_data[0], plane_size);
1699 
1700  if (planar && avctx->channels > 1) {
1701  uint8_t *out = ((uint8_t *)samples) + plane_size;
1702  for (ch = 1; ch < avctx->channels; ch++) {
1703  memcpy(out, frame.extended_data[ch], plane_size);
1704  out += plane_size;
1705  }
1706  }
1707  *frame_size_ptr = data_size;
1708  } else {
1709  *frame_size_ptr = 0;
1710  }
1711  return ret;
1712 }
1713 
1714 #endif
1715 
1717  AVFrame *frame,
1718  int *got_frame_ptr,
1719  const AVPacket *avpkt)
1720 {
1721  int planar, channels;
1722  int ret = 0;
1723 
1724  *got_frame_ptr = 0;
1725 
1726  if (!avpkt->data && avpkt->size) {
1727  av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1728  return AVERROR(EINVAL);
1729  }
1730  if (avctx->codec->type != AVMEDIA_TYPE_AUDIO) {
1731  av_log(avctx, AV_LOG_ERROR, "Invalid media type for audio\n");
1732  return AVERROR(EINVAL);
1733  }
1734 
1736 
1737  if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1738  uint8_t *side;
1739  int side_size;
1740  // copy to ensure we do not change avpkt
1741  AVPacket tmp = *avpkt;
1742  int did_split = av_packet_split_side_data(&tmp);
1743  apply_param_change(avctx, &tmp);
1744 
1745  avctx->pkt = &tmp;
1746  ret = avctx->codec->decode(avctx, frame, got_frame_ptr, &tmp);
1747  if (ret >= 0 && *got_frame_ptr) {
1748  avctx->frame_number++;
1749  frame->pkt_dts = avpkt->dts;
1751  frame->pkt_pts,
1752  frame->pkt_dts);
1753  if (frame->format == AV_SAMPLE_FMT_NONE)
1754  frame->format = avctx->sample_fmt;
1755  if (!frame->channel_layout)
1756  frame->channel_layout = avctx->channel_layout;
1757  if (!frame->channels)
1758  frame->channels = avctx->channels;
1759  if (!frame->sample_rate)
1760  frame->sample_rate = avctx->sample_rate;
1761  }
1762  add_metadata_from_side_data(avctx, frame);
1763 
1764  side= av_packet_get_side_data(avctx->pkt, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
1765  if(side && side_size>=10) {
1766  avctx->internal->skip_samples = AV_RL32(side);
1767  av_log(avctx, AV_LOG_DEBUG, "skip %d samples due to side data\n",
1768  avctx->internal->skip_samples);
1769  }
1770  if (avctx->internal->skip_samples && *got_frame_ptr) {
1771  if(frame->nb_samples <= avctx->internal->skip_samples){
1772  *got_frame_ptr = 0;
1773  avctx->internal->skip_samples -= frame->nb_samples;
1774  av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
1775  avctx->internal->skip_samples);
1776  } else {
1778  frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
1779  if(avctx->pkt_timebase.num && avctx->sample_rate) {
1780  int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
1781  (AVRational){1, avctx->sample_rate},
1782  avctx->pkt_timebase);
1783  if(frame->pkt_pts!=AV_NOPTS_VALUE)
1784  frame->pkt_pts += diff_ts;
1785  if(frame->pkt_dts!=AV_NOPTS_VALUE)
1786  frame->pkt_dts += diff_ts;
1787  if (frame->pkt_duration >= diff_ts)
1788  frame->pkt_duration -= diff_ts;
1789  } else {
1790  av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
1791  }
1792  av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
1793  avctx->internal->skip_samples, frame->nb_samples);
1794  frame->nb_samples -= avctx->internal->skip_samples;
1795  avctx->internal->skip_samples = 0;
1796  }
1797  }
1798 
1799  avctx->pkt = NULL;
1800  if (did_split) {
1802  if(ret == tmp.size)
1803  ret = avpkt->size;
1804  }
1805  }
1806 
1807  /* many decoders assign whole AVFrames, thus overwriting extended_data;
1808  * make sure it's set correctly; assume decoders that actually use
1809  * extended_data are doing it correctly */
1810  if (*got_frame_ptr) {
1811  planar = av_sample_fmt_is_planar(frame->format);
1812  channels = frame->channels;
1813  if (!(planar && channels > AV_NUM_DATA_POINTERS))
1814  frame->extended_data = frame->data;
1815  } else {
1816  frame->extended_data = NULL;
1817  }
1818 
1819  return ret;
1820 }
1821 
1823  int *got_sub_ptr,
1824  AVPacket *avpkt)
1825 {
1826  int ret = 0;
1827 
1828  if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
1829  av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
1830  return AVERROR(EINVAL);
1831  }
1832 
1833  *got_sub_ptr = 0;
1835 
1836  if (avpkt->size) {
1837  AVPacket tmp = *avpkt;
1838  int did_split = av_packet_split_side_data(&tmp);
1839  //apply_param_change(avctx, &tmp);
1840 
1841  avctx->pkt = &tmp;
1842 
1843  if (avctx->pkt_timebase.den && avpkt->pts != AV_NOPTS_VALUE)
1844  sub->pts = av_rescale_q(avpkt->pts,
1845  avctx->pkt_timebase, AV_TIME_BASE_Q);
1846  ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &tmp);
1847  sub->format = sub->num_rects && sub->rects[0]->ass;
1848 
1849  avctx->pkt = NULL;
1850  if (did_split) {
1852  if(ret == tmp.size)
1853  ret = avpkt->size;
1854  }
1855 
1856  if (*got_sub_ptr)
1857  avctx->frame_number++;
1858  }
1859 
1860  return ret;
1861 }
1862 
1864 {
1865  int i;
1866 
1867  for (i = 0; i < sub->num_rects; i++) {
1868  av_freep(&sub->rects[i]->pict.data[0]);
1869  av_freep(&sub->rects[i]->pict.data[1]);
1870  av_freep(&sub->rects[i]->pict.data[2]);
1871  av_freep(&sub->rects[i]->pict.data[3]);
1872  av_freep(&sub->rects[i]->text);
1873  av_freep(&sub->rects[i]->ass);
1874  av_freep(&sub->rects[i]);
1875  }
1876 
1877  av_freep(&sub->rects);
1878 
1879  memset(sub, 0, sizeof(AVSubtitle));
1880 }
1881 
1883 {
1884  int ret = 0;
1885 
1887 
1888  ret = avcodec_close(avctx);
1889 
1891  return ret;
1892 }
1893 
1895 {
1896  int ret = ff_lock_avcodec(avctx);
1897  if (ret < 0)
1898  return ret;
1899 
1900  if (avcodec_is_open(avctx)) {
1901  if (HAVE_THREADS && avctx->internal->frame_thread_encoder && avctx->thread_count > 1) {
1904  ff_lock_avcodec(avctx);
1905  }
1906  if (HAVE_THREADS && avctx->thread_opaque)
1907  ff_thread_free(avctx);
1908  if (avctx->codec && avctx->codec->close)
1909  avctx->codec->close(avctx);
1911  avctx->coded_frame = NULL;
1912  avctx->internal->byte_buffer_size = 0;
1913  av_freep(&avctx->internal->byte_buffer);
1914  av_freep(&avctx->internal);
1915  av_dict_free(&avctx->metadata);
1916  }
1917 
1918  if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1919  av_opt_free(avctx->priv_data);
1920  av_opt_free(avctx);
1921  av_freep(&avctx->priv_data);
1922  if (av_codec_is_encoder(avctx->codec))
1923  av_freep(&avctx->extradata);
1924  avctx->codec = NULL;
1925  avctx->active_thread_type = 0;
1926 
1928  return 0;
1929 }
1930 
1932 {
1933  switch(id){
1934  //This is for future deprecatec codec ids, its empty since
1935  //last major bump but will fill up again over time, please don't remove it
1936 // case AV_CODEC_ID_UTVIDEO_DEPRECATED: return AV_CODEC_ID_UTVIDEO;
1939  default : return id;
1940  }
1941 }
1942 
1943 static AVCodec *find_encdec(enum AVCodecID id, int encoder)
1944 {
1945  AVCodec *p, *experimental = NULL;
1946  p = first_avcodec;
1947  id= remap_deprecated_codec_id(id);
1948  while (p) {
1949  if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
1950  p->id == id) {
1951  if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1952  experimental = p;
1953  } else
1954  return p;
1955  }
1956  p = p->next;
1957  }
1958  return experimental;
1959 }
1960 
1962 {
1963  return find_encdec(id, 1);
1964 }
1965 
1967 {
1968  AVCodec *p;
1969  if (!name)
1970  return NULL;
1971  p = first_avcodec;
1972  while (p) {
1973  if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
1974  return p;
1975  p = p->next;
1976  }
1977  return NULL;
1978 }
1979 
1981 {
1982  return find_encdec(id, 0);
1983 }
1984 
1986 {
1987  AVCodec *p;
1988  if (!name)
1989  return NULL;
1990  p = first_avcodec;
1991  while (p) {
1992  if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
1993  return p;
1994  p = p->next;
1995  }
1996  return NULL;
1997 }
1998 
1999 const char *avcodec_get_name(enum AVCodecID id)
2000 {
2001  const AVCodecDescriptor *cd;
2002  AVCodec *codec;
2003 
2004  if (id == AV_CODEC_ID_NONE)
2005  return "none";
2006  cd = avcodec_descriptor_get(id);
2007  if (cd)
2008  return cd->name;
2009  av_log(NULL, AV_LOG_WARNING, "Codec 0x%x is not in the full list.\n", id);
2010  codec = avcodec_find_decoder(id);
2011  if (codec)
2012  return codec->name;
2013  codec = avcodec_find_encoder(id);
2014  if (codec)
2015  return codec->name;
2016  return "unknown_codec";
2017 }
2018 
2019 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
2020 {
2021  int i, len, ret = 0;
2022 
2023 #define IS_PRINT(x) \
2024  (((x) >= '0' && (x) <= '9') || \
2025  ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') || \
2026  ((x) == '.' || (x) == ' ' || (x) == '-' || (x) == '_'))
2027 
2028  for (i = 0; i < 4; i++) {
2029  len = snprintf(buf, buf_size,
2030  IS_PRINT(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
2031  buf += len;
2032  buf_size = buf_size > len ? buf_size - len : 0;
2033  ret += len;
2034  codec_tag >>= 8;
2035  }
2036  return ret;
2037 }
2038 
2039 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
2040 {
2041  const char *codec_type;
2042  const char *codec_name;
2043  const char *profile = NULL;
2044  const AVCodec *p;
2045  int bitrate;
2046  AVRational display_aspect_ratio;
2047 
2048  if (!buf || buf_size <= 0)
2049  return;
2050  codec_type = av_get_media_type_string(enc->codec_type);
2051  codec_name = avcodec_get_name(enc->codec_id);
2052  if (enc->profile != FF_PROFILE_UNKNOWN) {
2053  if (enc->codec)
2054  p = enc->codec;
2055  else
2056  p = encode ? avcodec_find_encoder(enc->codec_id) :
2058  if (p)
2059  profile = av_get_profile_name(p, enc->profile);
2060  }
2061 
2062  snprintf(buf, buf_size, "%s: %s%s", codec_type ? codec_type : "unknown",
2063  codec_name, enc->mb_decision ? " (hq)" : "");
2064  buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
2065  if (profile)
2066  snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile);
2067  if (enc->codec_tag) {
2068  char tag_buf[32];
2069  av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
2070  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2071  " (%s / 0x%04X)", tag_buf, enc->codec_tag);
2072  }
2073 
2074  switch (enc->codec_type) {
2075  case AVMEDIA_TYPE_VIDEO:
2076  if (enc->pix_fmt != AV_PIX_FMT_NONE) {
2077  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2078  ", %s",
2080  if (enc->bits_per_raw_sample &&
2082  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2083  " (%d bpc)", enc->bits_per_raw_sample);
2084  }
2085  if (enc->width) {
2086  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2087  ", %dx%d",
2088  enc->width, enc->height);
2089  if (enc->sample_aspect_ratio.num) {
2090  av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
2091  enc->width * enc->sample_aspect_ratio.num,
2092  enc->height * enc->sample_aspect_ratio.den,
2093  1024 * 1024);
2094  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2095  " [SAR %d:%d DAR %d:%d]",
2097  display_aspect_ratio.num, display_aspect_ratio.den);
2098  }
2099  if (av_log_get_level() >= AV_LOG_DEBUG) {
2100  int g = av_gcd(enc->time_base.num, enc->time_base.den);
2101  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2102  ", %d/%d",
2103  enc->time_base.num / g, enc->time_base.den / g);
2104  }
2105  }
2106  if (encode) {
2107  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2108  ", q=%d-%d", enc->qmin, enc->qmax);
2109  }
2110  break;
2111  case AVMEDIA_TYPE_AUDIO:
2112  if (enc->sample_rate) {
2113  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2114  ", %d Hz", enc->sample_rate);
2115  }
2116  av_strlcat(buf, ", ", buf_size);
2117  av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
2118  if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
2119  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2120  ", %s", av_get_sample_fmt_name(enc->sample_fmt));
2121  }
2122  break;
2123  default:
2124  return;
2125  }
2126  if (encode) {
2127  if (enc->flags & CODEC_FLAG_PASS1)
2128  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2129  ", pass 1");
2130  if (enc->flags & CODEC_FLAG_PASS2)
2131  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2132  ", pass 2");
2133  }
2134  bitrate = get_bit_rate(enc);
2135  if (bitrate != 0) {
2136  snprintf(buf + strlen(buf), buf_size - strlen(buf),
2137  ", %d kb/s", bitrate / 1000);
2138  }
2139 }
2140 
2141 const char *av_get_profile_name(const AVCodec *codec, int profile)
2142 {
2143  const AVProfile *p;
2144  if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
2145  return NULL;
2146 
2147  for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
2148  if (p->profile == profile)
2149  return p->name;
2150 
2151  return NULL;
2152 }
2153 
2154 unsigned avcodec_version(void)
2155 {
2156 // av_assert0(AV_CODEC_ID_V410==164);
2159 // av_assert0(AV_CODEC_ID_BMV_AUDIO==86071);
2160  av_assert0(AV_CODEC_ID_SRT==94216);
2162 
2163  return LIBAVCODEC_VERSION_INT;
2164 }
2165 
2166 const char *avcodec_configuration(void)
2167 {
2168  return FFMPEG_CONFIGURATION;
2169 }
2170 
2171 const char *avcodec_license(void)
2172 {
2173 #define LICENSE_PREFIX "libavcodec license: "
2174  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
2175 }
2176 
2178 {
2179  if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
2180  ff_thread_flush(avctx);
2181  else if (avctx->codec->flush)
2182  avctx->codec->flush(avctx);
2183 
2184  avctx->pts_correction_last_pts =
2185  avctx->pts_correction_last_dts = INT64_MIN;
2186 }
2187 
2189 {
2190  AVCodecInternal *avci = s->internal;
2191  int i, j;
2192 
2193  if (!avci->buffer)
2194  return;
2195 
2196  if (avci->buffer_count)
2197  av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
2198  avci->buffer_count);
2199  for (i = 0; i < INTERNAL_BUFFER_SIZE; i++) {
2200  InternalBuffer *buf = &avci->buffer[i];
2201  for (j = 0; j < 4; j++) {
2202  av_freep(&buf->base[j]);
2203  buf->data[j] = NULL;
2204  }
2205  }
2206  av_freep(&avci->buffer);
2207 
2208  avci->buffer_count = 0;
2209 }
2210 
2212 {
2213  AVCodecInternal *avci = avctx->internal;
2214  av_freep(&avci->audio_data);
2215 }
2216 
2218 {
2219  switch (avctx->codec_type) {
2220  case AVMEDIA_TYPE_VIDEO:
2221  video_free_buffers(avctx);
2222  break;
2223  case AVMEDIA_TYPE_AUDIO:
2224  audio_free_buffers(avctx);
2225  break;
2226  default:
2227  break;
2228  }
2229 }
2230 
2232 {
2233  switch (codec_id) {
2234  case AV_CODEC_ID_8SVX_EXP:
2235  case AV_CODEC_ID_8SVX_FIB:
2236  case AV_CODEC_ID_ADPCM_CT:
2243  return 4;
2244  case AV_CODEC_ID_PCM_ALAW:
2245  case AV_CODEC_ID_PCM_MULAW:
2246  case AV_CODEC_ID_PCM_S8:
2248  case AV_CODEC_ID_PCM_U8:
2249  case AV_CODEC_ID_PCM_ZORK:
2250  return 8;
2251  case AV_CODEC_ID_PCM_S16BE:
2253  case AV_CODEC_ID_PCM_S16LE:
2255  case AV_CODEC_ID_PCM_U16BE:
2256  case AV_CODEC_ID_PCM_U16LE:
2257  return 16;
2259  case AV_CODEC_ID_PCM_S24BE:
2260  case AV_CODEC_ID_PCM_S24LE:
2262  case AV_CODEC_ID_PCM_U24BE:
2263  case AV_CODEC_ID_PCM_U24LE:
2264  return 24;
2265  case AV_CODEC_ID_PCM_S32BE:
2266  case AV_CODEC_ID_PCM_S32LE:
2268  case AV_CODEC_ID_PCM_U32BE:
2269  case AV_CODEC_ID_PCM_U32LE:
2270  case AV_CODEC_ID_PCM_F32BE:
2271  case AV_CODEC_ID_PCM_F32LE:
2272  return 32;
2273  case AV_CODEC_ID_PCM_F64BE:
2274  case AV_CODEC_ID_PCM_F64LE:
2275  return 64;
2276  default:
2277  return 0;
2278  }
2279 }
2280 
2282 {
2283  static const enum AVCodecID map[AV_SAMPLE_FMT_NB][2] = {
2294  };
2295  if (fmt < 0 || fmt >= AV_SAMPLE_FMT_NB)
2296  return AV_CODEC_ID_NONE;
2297  if (be < 0 || be > 1)
2298  be = AV_NE(1, 0);
2299  return map[fmt][be];
2300 }
2301 
2303 {
2304  switch (codec_id) {
2306  return 2;
2308  return 3;
2312  case AV_CODEC_ID_ADPCM_SWF:
2313  case AV_CODEC_ID_ADPCM_MS:
2314  return 4;
2315  default:
2316  return av_get_exact_bits_per_sample(codec_id);
2317  }
2318 }
2319 
2320 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
2321 {
2322  int id, sr, ch, ba, tag, bps;
2323 
2324  id = avctx->codec_id;
2325  sr = avctx->sample_rate;
2326  ch = avctx->channels;
2327  ba = avctx->block_align;
2328  tag = avctx->codec_tag;
2329  bps = av_get_exact_bits_per_sample(avctx->codec_id);
2330 
2331  /* codecs with an exact constant bits per sample */
2332  if (bps > 0 && ch > 0 && frame_bytes > 0 && ch < 32768 && bps < 32768)
2333  return (frame_bytes * 8LL) / (bps * ch);
2334  bps = avctx->bits_per_coded_sample;
2335 
2336  /* codecs with a fixed packet duration */
2337  switch (id) {
2338  case AV_CODEC_ID_ADPCM_ADX: return 32;
2339  case AV_CODEC_ID_ADPCM_IMA_QT: return 64;
2340  case AV_CODEC_ID_ADPCM_EA_XAS: return 128;
2341  case AV_CODEC_ID_AMR_NB:
2342  case AV_CODEC_ID_GSM:
2343  case AV_CODEC_ID_QCELP:
2344  case AV_CODEC_ID_RA_288: return 160;
2345  case AV_CODEC_ID_AMR_WB:
2346  case AV_CODEC_ID_GSM_MS: return 320;
2347  case AV_CODEC_ID_MP1: return 384;
2348  case AV_CODEC_ID_ATRAC1: return 512;
2349  case AV_CODEC_ID_ATRAC3: return 1024;
2350  case AV_CODEC_ID_MP2:
2351  case AV_CODEC_ID_MUSEPACK7: return 1152;
2352  case AV_CODEC_ID_AC3: return 1536;
2353  }
2354 
2355  if (sr > 0) {
2356  /* calc from sample rate */
2357  if (id == AV_CODEC_ID_TTA)
2358  return 256 * sr / 245;
2359 
2360  if (ch > 0) {
2361  /* calc from sample rate and channels */
2362  if (id == AV_CODEC_ID_BINKAUDIO_DCT)
2363  return (480 << (sr / 22050)) / ch;
2364  }
2365  }
2366 
2367  if (ba > 0) {
2368  /* calc from block_align */
2369  if (id == AV_CODEC_ID_SIPR) {
2370  switch (ba) {
2371  case 20: return 160;
2372  case 19: return 144;
2373  case 29: return 288;
2374  case 37: return 480;
2375  }
2376  } else if (id == AV_CODEC_ID_ILBC) {
2377  switch (ba) {
2378  case 38: return 160;
2379  case 50: return 240;
2380  }
2381  }
2382  }
2383 
2384  if (frame_bytes > 0) {
2385  /* calc from frame_bytes only */
2386  if (id == AV_CODEC_ID_TRUESPEECH)
2387  return 240 * (frame_bytes / 32);
2388  if (id == AV_CODEC_ID_NELLYMOSER)
2389  return 256 * (frame_bytes / 64);
2390  if (id == AV_CODEC_ID_RA_144)
2391  return 160 * (frame_bytes / 20);
2392  if (id == AV_CODEC_ID_G723_1)
2393  return 240 * (frame_bytes / 24);
2394 
2395  if (bps > 0) {
2396  /* calc from frame_bytes and bits_per_coded_sample */
2397  if (id == AV_CODEC_ID_ADPCM_G726)
2398  return frame_bytes * 8 / bps;
2399  }
2400 
2401  if (ch > 0) {
2402  /* calc from frame_bytes and channels */
2403  switch (id) {
2404  case AV_CODEC_ID_ADPCM_AFC:
2405  return frame_bytes / (9 * ch) * 16;
2406  case AV_CODEC_ID_ADPCM_4XM:
2408  return (frame_bytes - 4 * ch) * 2 / ch;
2410  return (frame_bytes - 4) * 2 / ch;
2412  return (frame_bytes - 8) * 2 / ch;
2413  case AV_CODEC_ID_ADPCM_XA:
2414  return (frame_bytes / 128) * 224 / ch;
2416  return (frame_bytes - 6 - ch) / ch;
2417  case AV_CODEC_ID_ROQ_DPCM:
2418  return (frame_bytes - 8) / ch;
2419  case AV_CODEC_ID_XAN_DPCM:
2420  return (frame_bytes - 2 * ch) / ch;
2421  case AV_CODEC_ID_MACE3:
2422  return 3 * frame_bytes / ch;
2423  case AV_CODEC_ID_MACE6:
2424  return 6 * frame_bytes / ch;
2425  case AV_CODEC_ID_PCM_LXF:
2426  return 2 * (frame_bytes / (5 * ch));
2427  case AV_CODEC_ID_IAC:
2428  case AV_CODEC_ID_IMC:
2429  return 4 * frame_bytes / ch;
2430  }
2431 
2432  if (tag) {
2433  /* calc from frame_bytes, channels, and codec_tag */
2434  if (id == AV_CODEC_ID_SOL_DPCM) {
2435  if (tag == 3)
2436  return frame_bytes / ch;
2437  else
2438  return frame_bytes * 2 / ch;
2439  }
2440  }
2441 
2442  if (ba > 0) {
2443  /* calc from frame_bytes, channels, and block_align */
2444  int blocks = frame_bytes / ba;
2445  switch (avctx->codec_id) {
2447  return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
2449  return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
2451  return blocks * (1 + (ba - 4 * ch) * 2 / ch);
2452  case AV_CODEC_ID_ADPCM_MS:
2453  return blocks * (2 + (ba - 7 * ch) * 2 / ch);
2454  }
2455  }
2456 
2457  if (bps > 0) {
2458  /* calc from frame_bytes, channels, and bits_per_coded_sample */
2459  switch (avctx->codec_id) {
2460  case AV_CODEC_ID_PCM_DVD:
2461  if(bps<4)
2462  return 0;
2463  return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
2465  if(bps<4)
2466  return 0;
2467  return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
2468  case AV_CODEC_ID_S302M:
2469  return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
2470  }
2471  }
2472  }
2473  }
2474 
2475  return 0;
2476 }
2477 
2478 #if !HAVE_THREADS
2480 {
2481  return -1;
2482 }
2483 
2484 #endif
2485 
2486 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
2487 {
2488  unsigned int n = 0;
2489 
2490  while (v >= 0xff) {
2491  *s++ = 0xff;
2492  v -= 0xff;
2493  n++;
2494  }
2495  *s = v;
2496  n++;
2497  return n;
2498 }
2499 
2500 int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
2501 {
2502  int i;
2503  for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
2504  return i;
2505 }
2506 
2507 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
2508 {
2509  av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your FFmpeg "
2510  "version to the newest one from Git. If the problem still "
2511  "occurs, it means that your file has a feature which has not "
2512  "been implemented.\n", feature);
2513  if(want_sample)
2515 }
2516 
2517 void av_log_ask_for_sample(void *avc, const char *msg, ...)
2518 {
2519  va_list argument_list;
2520 
2521  va_start(argument_list, msg);
2522 
2523  if (msg)
2524  av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
2525  av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
2526  "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
2527  "and contact the ffmpeg-devel mailing list.\n");
2528 
2529  va_end(argument_list);
2530 }
2531 
2533 
2535 {
2536  AVHWAccel **p = &first_hwaccel;
2537  while (*p)
2538  p = &(*p)->next;
2539  *p = hwaccel;
2540  hwaccel->next = NULL;
2541 }
2542 
2544 {
2545  return hwaccel ? hwaccel->next : first_hwaccel;
2546 }
2547 
2549 {
2550  AVHWAccel *hwaccel = NULL;
2551 
2552  while ((hwaccel = av_hwaccel_next(hwaccel)))
2553  if (hwaccel->id == codec_id
2554  && hwaccel->pix_fmt == pix_fmt)
2555  return hwaccel;
2556  return NULL;
2557 }
2558 
2559 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
2560 {
2561  if (ff_lockmgr_cb) {
2563  return -1;
2565  return -1;
2566  }
2567 
2568  ff_lockmgr_cb = cb;
2569 
2570  if (ff_lockmgr_cb) {
2572  return -1;
2574  return -1;
2575  }
2576  return 0;
2577 }
2578 
2580 {
2581  if (ff_lockmgr_cb) {
2583  return -1;
2584  }
2586  if (entangled_thread_counter != 1) {
2587  av_log(log_ctx, AV_LOG_ERROR, "Insufficient thread locking around avcodec_open/close()\n");
2588  ff_avcodec_locked = 1;
2590  return AVERROR(EINVAL);
2591  }
2593  ff_avcodec_locked = 1;
2594  return 0;
2595 }
2596 
2598 {
2600  ff_avcodec_locked = 0;
2602  if (ff_lockmgr_cb) {
2604  return -1;
2605  }
2606  return 0;
2607 }
2608 
2610 {
2611  if (ff_lockmgr_cb) {
2613  return -1;
2614  }
2615  return 0;
2616 }
2617 
2619 {
2620  if (ff_lockmgr_cb) {
2622  return -1;
2623  }
2624  return 0;
2625 }
2626 
2627 unsigned int avpriv_toupper4(unsigned int x)
2628 {
2629  return toupper(x & 0xFF)
2630  + (toupper((x >> 8) & 0xFF) << 8)
2631  + (toupper((x >> 16) & 0xFF) << 16)
2632  + (toupper((x >> 24) & 0xFF) << 24);
2633 }
2634 
2635 #if !HAVE_THREADS
2636 
2638 {
2639  f->owner = avctx;
2640 
2641  return ff_get_buffer(avctx, f);
2642 }
2643 
2645 {
2646  f->owner->release_buffer(f->owner, f);
2647 }
2648 
2650 {
2651 }
2652 
2653 void ff_thread_report_progress(AVFrame *f, int progress, int field)
2654 {
2655 }
2656 
2657 void ff_thread_await_progress(AVFrame *f, int progress, int field)
2658 {
2659 }
2660 
2662 {
2663  return 1;
2664 }
2665 
2666 #endif
2667 
2669 {
2670  AVCodec *c= avcodec_find_decoder(codec_id);
2671  if(!c)
2672  c= avcodec_find_encoder(codec_id);
2673  if(c)
2674  return c->type;
2675 
2676  if (codec_id <= AV_CODEC_ID_NONE)
2677  return AVMEDIA_TYPE_UNKNOWN;
2678  else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
2679  return AVMEDIA_TYPE_VIDEO;
2680  else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
2681  return AVMEDIA_TYPE_AUDIO;
2682  else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
2683  return AVMEDIA_TYPE_SUBTITLE;
2684 
2685  return AVMEDIA_TYPE_UNKNOWN;
2686 }
2687 
2689 {
2690  return !!s->internal;
2691 }
2692 
2694 {
2695  int ret;
2696  char *str;
2697 
2698  ret = av_bprint_finalize(buf, &str);
2699  if (ret < 0)
2700  return ret;
2701  avctx->extradata = str;
2702  /* Note: the string is NUL terminated (so extradata can be read as a
2703  * string), but the ending character is not accounted in the size (in
2704  * binary formats you are likely not supposed to mux that character). When
2705  * extradata is copied, it is also padded with FF_INPUT_BUFFER_PADDING_SIZE
2706  * zeros. */
2707  avctx->extradata_size = buf->len;
2708  return 0;
2709 }