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 Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/crc.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/audioconvert.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/samplefmt.h"
36 #include "libavutil/dict.h"
37 #include "avcodec.h"
38 #include "dsputil.h"
39 #include "libavutil/opt.h"
40 #include "imgconvert.h"
41 #include "thread.h"
42 #include "audioconvert.h"
43 #include "internal.h"
44 #include "bytestream.h"
45 #include <stdlib.h>
46 #include <stdarg.h>
47 #include <limits.h>
48 #include <float.h>
49 
50 static int volatile entangled_thread_counter=0;
51 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
52 static void *codec_mutex;
53 static void *avformat_mutex;
54 
55 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
56 {
57  if(min_size < *size)
58  return ptr;
59 
60  min_size= FFMAX(17*min_size/16 + 32, min_size);
61 
62  ptr= av_realloc(ptr, min_size);
63  if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
64  min_size= 0;
65 
66  *size= min_size;
67 
68  return ptr;
69 }
70 
71 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
72 {
73  void **p = ptr;
74  if (min_size < *size)
75  return;
76  min_size= FFMAX(17*min_size/16 + 32, min_size);
77  av_free(*p);
78  *p = av_malloc(min_size);
79  if (!*p) min_size = 0;
80  *size= min_size;
81 }
82 
83 /* encoder management */
85 
87  if(c) return c->next;
88  else return first_avcodec;
89 }
90 
91 #if !FF_API_AVCODEC_INIT
92 static
93 #endif
94 void avcodec_init(void)
95 {
96  static int initialized = 0;
97 
98  if (initialized != 0)
99  return;
100  initialized = 1;
101 
103 }
104 
106 {
107  return codec && (codec->encode || codec->encode2);
108 }
109 
111 {
112  return codec && codec->decode;
113 }
114 
116 {
117  AVCodec **p;
118  avcodec_init();
119  p = &first_avcodec;
120  while (*p != NULL) p = &(*p)->next;
121  *p = codec;
122  codec->next = NULL;
123 
124  if (codec->init_static_data)
125  codec->init_static_data(codec);
126 }
127 
129 {
130  return EDGE_WIDTH;
131 }
132 
134  s->coded_width = width;
135  s->coded_height= height;
136  s->width = -((-width )>>s->lowres);
137  s->height= -((-height)>>s->lowres);
138 }
139 
140 #define INTERNAL_BUFFER_SIZE (32+1)
141 
143  int linesize_align[AV_NUM_DATA_POINTERS])
144 {
145  int i;
146  int w_align= 1;
147  int h_align= 1;
148 
149  switch(s->pix_fmt){
150  case PIX_FMT_YUV420P:
151  case PIX_FMT_YUYV422:
152  case PIX_FMT_UYVY422:
153  case PIX_FMT_YUV422P:
154  case PIX_FMT_YUV440P:
155  case PIX_FMT_YUV444P:
156  case PIX_FMT_GBRP:
157  case PIX_FMT_GRAY8:
158  case PIX_FMT_GRAY16BE:
159  case PIX_FMT_GRAY16LE:
160  case PIX_FMT_YUVJ420P:
161  case PIX_FMT_YUVJ422P:
162  case PIX_FMT_YUVJ440P:
163  case PIX_FMT_YUVJ444P:
164  case PIX_FMT_YUVA420P:
165  case PIX_FMT_YUV420P9LE:
166  case PIX_FMT_YUV420P9BE:
167  case PIX_FMT_YUV420P10LE:
168  case PIX_FMT_YUV420P10BE:
169  case PIX_FMT_YUV422P9LE:
170  case PIX_FMT_YUV422P9BE:
171  case PIX_FMT_YUV422P10LE:
172  case PIX_FMT_YUV422P10BE:
173  case PIX_FMT_YUV444P9LE:
174  case PIX_FMT_YUV444P9BE:
175  case PIX_FMT_YUV444P10LE:
176  case PIX_FMT_YUV444P10BE:
177  case PIX_FMT_GBRP9LE:
178  case PIX_FMT_GBRP9BE:
179  case PIX_FMT_GBRP10LE:
180  case PIX_FMT_GBRP10BE:
181  w_align = 16; //FIXME assume 16 pixel per macroblock
182  h_align = 16 * 2; // interlaced needs 2 macroblocks height
183  break;
184  case PIX_FMT_YUV411P:
185  case PIX_FMT_UYYVYY411:
186  w_align=32;
187  h_align=8;
188  break;
189  case PIX_FMT_YUV410P:
190  if(s->codec_id == CODEC_ID_SVQ1){
191  w_align=64;
192  h_align=64;
193  }
194  case PIX_FMT_RGB555:
195  if(s->codec_id == CODEC_ID_RPZA){
196  w_align=4;
197  h_align=4;
198  }
199  case PIX_FMT_PAL8:
200  case PIX_FMT_BGR8:
201  case PIX_FMT_RGB8:
202  if(s->codec_id == CODEC_ID_SMC){
203  w_align=4;
204  h_align=4;
205  }
206  break;
207  case PIX_FMT_BGR24:
208  if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
209  w_align=4;
210  h_align=4;
211  }
212  break;
213  default:
214  w_align= 1;
215  h_align= 1;
216  break;
217  }
218 
219  *width = FFALIGN(*width , w_align);
220  *height= FFALIGN(*height, h_align);
221  if(s->codec_id == CODEC_ID_H264 || s->lowres)
222  *height+=2; // some of the optimized chroma MC reads one line too much
223  // which is also done in mpeg decoders with lowres > 0
224 
225  for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
226  linesize_align[i] = STRIDE_ALIGN;
227 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
228 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
229 //picture size unneccessarily in some cases. The solution here is not
230 //pretty and better ideas are welcome!
231 #if HAVE_MMX
232  if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
233  s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
234  s->codec_id == CODEC_ID_VP6A) {
235  for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
236  linesize_align[i] = 16;
237  }
238 #endif
239 }
240 
242  int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
243  int linesize_align[AV_NUM_DATA_POINTERS];
244  int align;
245  avcodec_align_dimensions2(s, width, height, linesize_align);
246  align = FFMAX(linesize_align[0], linesize_align[3]);
247  linesize_align[1] <<= chroma_shift;
248  linesize_align[2] <<= chroma_shift;
249  align = FFMAX3(align, linesize_align[1], linesize_align[2]);
250  *width=FFALIGN(*width, align);
251 }
252 
254  enum AVSampleFormat sample_fmt, const uint8_t *buf,
255  int buf_size, int align)
256 {
257  int ch, planar, needed_size, ret = 0;
258 
259  needed_size = av_samples_get_buffer_size(NULL, nb_channels,
260  frame->nb_samples, sample_fmt,
261  align);
262  if (buf_size < needed_size)
263  return AVERROR(EINVAL);
264 
265  planar = av_sample_fmt_is_planar(sample_fmt);
266  if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
267  if (!(frame->extended_data = av_mallocz(nb_channels *
268  sizeof(*frame->extended_data))))
269  return AVERROR(ENOMEM);
270  } else {
271  frame->extended_data = frame->data;
272  }
273 
274  if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
275  buf, nb_channels, frame->nb_samples,
276  sample_fmt, align)) < 0) {
277  if (frame->extended_data != frame->data)
278  av_free(frame->extended_data);
279  return ret;
280  }
281  if (frame->extended_data != frame->data) {
282  for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
283  frame->data[ch] = frame->extended_data[ch];
284  }
285 
286  return ret;
287 }
288 
289 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
290 {
291  AVCodecInternal *avci = avctx->internal;
292  InternalBuffer *buf;
293  int buf_size, ret;
294 
295  buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
296  frame->nb_samples, avctx->sample_fmt,
297  32);
298  if (buf_size < 0)
299  return AVERROR(EINVAL);
300 
301  /* allocate InternalBuffer if needed */
302  if (!avci->buffer) {
303  avci->buffer = av_mallocz(sizeof(InternalBuffer));
304  if (!avci->buffer)
305  return AVERROR(ENOMEM);
306  }
307  buf = avci->buffer;
308 
309  /* if there is a previously-used internal buffer, check its size and
310  channel count to see if we can reuse it */
311  if (buf->extended_data) {
312  /* if current buffer is too small, free it */
313  if (buf->extended_data[0] && buf_size > buf->audio_data_size) {
314  av_free(buf->extended_data[0]);
315  if (buf->extended_data != buf->data)
316  av_free(&buf->extended_data);
317  buf->extended_data = NULL;
318  buf->data[0] = NULL;
319  }
320  /* if number of channels has changed, reset and/or free extended data
321  pointers but leave data buffer in buf->data[0] for reuse */
322  if (buf->nb_channels != avctx->channels) {
323  if (buf->extended_data != buf->data)
324  av_free(buf->extended_data);
325  buf->extended_data = NULL;
326  }
327  }
328 
329  /* if there is no previous buffer or the previous buffer cannot be used
330  as-is, allocate a new buffer and/or rearrange the channel pointers */
331  if (!buf->extended_data) {
332  if (!buf->data[0]) {
333  if (!(buf->data[0] = av_mallocz(buf_size)))
334  return AVERROR(ENOMEM);
335  buf->audio_data_size = buf_size;
336  }
337  if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
338  avctx->sample_fmt, buf->data[0],
339  buf->audio_data_size, 32)))
340  return ret;
341 
342  if (frame->extended_data == frame->data)
343  buf->extended_data = buf->data;
344  else
345  buf->extended_data = frame->extended_data;
346  memcpy(buf->data, frame->data, sizeof(frame->data));
347  buf->linesize[0] = frame->linesize[0];
348  buf->nb_channels = avctx->channels;
349  } else {
350  /* copy InternalBuffer info to the AVFrame */
351  frame->extended_data = buf->extended_data;
352  frame->linesize[0] = buf->linesize[0];
353  memcpy(frame->data, buf->data, sizeof(frame->data));
354  }
355 
356  frame->type = FF_BUFFER_TYPE_INTERNAL;
357 
358  if (avctx->pkt) frame->pkt_pts = avctx->pkt->pts;
359  else frame->pkt_pts = AV_NOPTS_VALUE;
360  frame->reordered_opaque = avctx->reordered_opaque;
361 
362  if (avctx->debug & FF_DEBUG_BUFFERS)
363  av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
364  "internal audio buffer used\n", frame);
365 
366  return 0;
367 }
368 
370 {
371  int i;
372  int w= s->width;
373  int h= s->height;
374  InternalBuffer *buf;
375  AVCodecInternal *avci = s->internal;
376 
377  if(pic->data[0]!=NULL) {
378  av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
379  return -1;
380  }
381  if(avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
382  av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
383  return -1;
384  }
385 
386  if(av_image_check_size(w, h, 0, s))
387  return -1;
388 
389  if (!avci->buffer) {
391  sizeof(InternalBuffer));
392  }
393 
394  buf = &avci->buffer[avci->buffer_count];
395 
396  if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
398  av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
399  return -1;
400  }
401 
402  for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
403  av_freep(&buf->base[i]);
404  buf->data[i]= NULL;
405  }
406  }
407 
408  if (!buf->base[0]) {
409  int h_chroma_shift, v_chroma_shift;
410  int size[4] = {0};
411  int tmpsize;
412  int unaligned;
414  int stride_align[AV_NUM_DATA_POINTERS];
415  const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
416 
417  avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
418 
419  avcodec_align_dimensions2(s, &w, &h, stride_align);
420 
421  if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
422  w+= EDGE_WIDTH*2;
423  h+= EDGE_WIDTH*2;
424  }
425 
426  do {
427  // NOTE: do not align linesizes individually, this breaks e.g. assumptions
428  // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
429  av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
430  // increase alignment of w for next try (rhs gives the lowest bit set in w)
431  w += w & ~(w-1);
432 
433  unaligned = 0;
434  for (i=0; i<4; i++){
435  unaligned |= picture.linesize[i] % stride_align[i];
436  }
437  } while (unaligned);
438 
439  tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
440  if (tmpsize < 0)
441  return -1;
442 
443  for (i=0; i<3 && picture.data[i+1]; i++)
444  size[i] = picture.data[i+1] - picture.data[i];
445  size[i] = tmpsize - (picture.data[i] - picture.data[0]);
446 
447  memset(buf->base, 0, sizeof(buf->base));
448  memset(buf->data, 0, sizeof(buf->data));
449 
450  for(i=0; i<4 && size[i]; i++){
451  const int h_shift= i==0 ? 0 : h_chroma_shift;
452  const int v_shift= i==0 ? 0 : v_chroma_shift;
453 
454  buf->linesize[i]= picture.linesize[i];
455 
456  buf->base[i]= av_malloc(size[i]+16); //FIXME 16
457  if(buf->base[i]==NULL) return -1;
458  memset(buf->base[i], 128, size[i]);
459 
460  // no edge if EDGE EMU or not planar YUV
461  if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
462  buf->data[i] = buf->base[i];
463  else
464  buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
465  }
466  for (; i < AV_NUM_DATA_POINTERS; i++) {
467  buf->base[i] = buf->data[i] = NULL;
468  buf->linesize[i] = 0;
469  }
470  if(size[1] && !size[2])
471  ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
472  buf->width = s->width;
473  buf->height = s->height;
474  buf->pix_fmt= s->pix_fmt;
475  }
477 
478  for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
479  pic->base[i]= buf->base[i];
480  pic->data[i]= buf->data[i];
481  pic->linesize[i]= buf->linesize[i];
482  }
483  pic->extended_data = pic->data;
484  avci->buffer_count++;
485 
486  if(s->pkt) pic->pkt_pts= s->pkt->pts;
487  else pic->pkt_pts= AV_NOPTS_VALUE;
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  switch (avctx->codec_type) {
500  case AVMEDIA_TYPE_VIDEO:
501  return video_get_buffer(avctx, frame);
502  case AVMEDIA_TYPE_AUDIO:
503  return audio_get_buffer(avctx, frame);
504  default:
505  return -1;
506  }
507 }
508 
510  int i;
511  InternalBuffer *buf, *last;
512  AVCodecInternal *avci = s->internal;
513 
514  assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
515 
516  assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
517  assert(avci->buffer_count);
518 
519  if (avci->buffer) {
520  buf = NULL; /* avoids warning */
521  for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
522  buf = &avci->buffer[i];
523  if (buf->data[0] == pic->data[0])
524  break;
525  }
526  assert(i < avci->buffer_count);
527  avci->buffer_count--;
528  last = &avci->buffer[avci->buffer_count];
529 
530  if (buf != last)
531  FFSWAP(InternalBuffer, *buf, *last);
532  }
533 
534  for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
535  pic->data[i]=NULL;
536 // pic->base[i]=NULL;
537  }
538 //printf("R%X\n", pic->opaque);
539 
540  if(s->debug&FF_DEBUG_BUFFERS)
541  av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d "
542  "buffers used\n", pic, avci->buffer_count);
543 }
544 
546  AVFrame temp_pic;
547  int i;
548 
549  assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
550 
551  /* If no picture return a new buffer */
552  if(pic->data[0] == NULL) {
553  /* We will copy from buffer, so must be readable */
555  return s->get_buffer(s, pic);
556  }
557 
558  /* If internal buffer type return the same buffer */
559  if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
560  if(s->pkt) pic->pkt_pts= s->pkt->pts;
561  else pic->pkt_pts= AV_NOPTS_VALUE;
563  return 0;
564  }
565 
566  /*
567  * Not internal type and reget_buffer not overridden, emulate cr buffer
568  */
569  temp_pic = *pic;
570  for(i = 0; i < AV_NUM_DATA_POINTERS; i++)
571  pic->data[i] = pic->base[i] = NULL;
572  pic->opaque = NULL;
573  /* Allocate new frame */
574  if (s->get_buffer(s, pic))
575  return -1;
576  /* Copy image data from old buffer to new buffer */
577  av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
578  s->height);
579  s->release_buffer(s, &temp_pic); // Release old frame
580  return 0;
581 }
582 
583 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
584  int i;
585 
586  for(i=0; i<count; i++){
587  int r= func(c, (char*)arg + i*size);
588  if(ret) ret[i]= r;
589  }
590  return 0;
591 }
592 
593 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
594  int i;
595 
596  for(i=0; i<count; i++){
597  int r= func(c, arg, i, 0);
598  if(ret) ret[i]= r;
599  }
600  return 0;
601 }
602 
604  while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
605  ++fmt;
606  return fmt[0];
607 }
608 
610  memset(pic, 0, sizeof(AVFrame));
611 
612  pic->pts= AV_NOPTS_VALUE;
613  pic->key_frame= 1;
614  pic->sample_aspect_ratio = (AVRational){0, 1};
615  pic->format = -1; /* unknown */
616 }
617 
619  AVFrame *pic= av_malloc(sizeof(AVFrame));
620 
621  if(pic==NULL) return NULL;
622 
624 
625  return pic;
626 }
627 
628 #if FF_API_AVCODEC_OPEN
629 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
630 {
631  return avcodec_open2(avctx, codec, NULL);
632 }
633 #endif
634 
636 {
637  int ret = 0;
638  AVDictionary *tmp = NULL;
639 
640  if (avcodec_is_open(avctx))
641  return 0;
642 
643  if ((!codec && !avctx->codec)) {
644  av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");
645  return AVERROR(EINVAL);
646  }
647  if ((codec && avctx->codec && codec != avctx->codec)) {
648  av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
649  "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);
650  return AVERROR(EINVAL);
651  }
652  if (!codec)
653  codec = avctx->codec;
654 
655  if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
656  return AVERROR(EINVAL);
657 
658  if (options)
659  av_dict_copy(&tmp, *options, 0);
660 
661  /* If there is a user-supplied mutex locking routine, call it. */
662  if (ff_lockmgr_cb) {
664  return -1;
665  }
666 
668  if(entangled_thread_counter != 1){
669  av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
670  ret = -1;
671  goto end;
672  }
673 
674  avctx->internal = av_mallocz(sizeof(AVCodecInternal));
675  if (!avctx->internal) {
676  ret = AVERROR(ENOMEM);
677  goto end;
678  }
679 
680  if (codec->priv_data_size > 0) {
681  if(!avctx->priv_data){
682  avctx->priv_data = av_mallocz(codec->priv_data_size);
683  if (!avctx->priv_data) {
684  ret = AVERROR(ENOMEM);
685  goto end;
686  }
687  if (codec->priv_class) {
688  *(AVClass**)avctx->priv_data= codec->priv_class;
690  }
691  }
692  if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
693  goto free_and_end;
694  } else {
695  avctx->priv_data = NULL;
696  }
697  if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
698  goto free_and_end;
699 
700  if(avctx->coded_width && avctx->coded_height)
701  avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
702  else if(avctx->width && avctx->height)
703  avcodec_set_dimensions(avctx, avctx->width, avctx->height);
704 
705  if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
706  && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
707  || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
708  av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
709  avcodec_set_dimensions(avctx, 0, 0);
710  }
711 
712  /* if the decoder init function was already called previously,
713  free the already allocated subtitle_header before overwriting it */
714  if (codec_is_decoder(codec))
715  av_freep(&avctx->subtitle_header);
716 
717 #define SANE_NB_CHANNELS 128U
718  if (avctx->channels > SANE_NB_CHANNELS) {
719  ret = AVERROR(EINVAL);
720  goto free_and_end;
721  }
722 
723  avctx->codec = codec;
724  if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
725  avctx->codec_id == CODEC_ID_NONE) {
726  avctx->codec_type = codec->type;
727  avctx->codec_id = codec->id;
728  }
729  if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
730  && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
731  av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
732  ret = AVERROR(EINVAL);
733  goto free_and_end;
734  }
735  avctx->frame_number = 0;
736 #if FF_API_ER
737 
738  av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition separate: %d; %d\n",
739  avctx->error_recognition, avctx->err_recognition);
740  /* FF_ER_CAREFUL (==1) implies AV_EF_CRCCHECK (== 1<<1 - 1),
741  FF_ER_COMPLIANT (==2) implies AV_EF_{CRCCHECK,BITSTREAM} (== 1<<2 - 1), et cetera} */
742  avctx->err_recognition |= (1<<(avctx->error_recognition-(avctx->error_recognition>=FF_ER_VERY_AGGRESSIVE))) - 1;
743  av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition combined: %d; %d\n",
744  avctx->error_recognition, avctx->err_recognition);
745 #endif
746 
747  if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
748  (!avctx->time_base.num || !avctx->time_base.den)) {
749  avctx->time_base.num = 1;
750  avctx->time_base.den = avctx->sample_rate;
751  }
752 
753  if (HAVE_THREADS && !avctx->thread_opaque) {
754  ret = ff_thread_init(avctx);
755  if (ret < 0) {
756  goto free_and_end;
757  }
758  }
760  avctx->thread_count = 1;
761 
762  if (avctx->codec->max_lowres < avctx->lowres) {
763  av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
764  avctx->codec->max_lowres);
765  ret = AVERROR(EINVAL);
766  goto free_and_end;
767  }
768  if (codec_is_encoder(avctx->codec)) {
769  int i;
770  if (avctx->codec->sample_fmts) {
771  for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
772  if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
773  break;
774  if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
775  av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
776  ret = AVERROR(EINVAL);
777  goto free_and_end;
778  }
779  }
780  if (avctx->codec->supported_samplerates) {
781  for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
782  if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
783  break;
784  if (avctx->codec->supported_samplerates[i] == 0) {
785  av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
786  ret = AVERROR(EINVAL);
787  goto free_and_end;
788  }
789  }
790  if (avctx->codec->channel_layouts) {
791  if (!avctx->channel_layout) {
792  av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
793  } else {
794  for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
795  if (avctx->channel_layout == avctx->codec->channel_layouts[i])
796  break;
797  if (avctx->codec->channel_layouts[i] == 0) {
798  av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
799  ret = AVERROR(EINVAL);
800  goto free_and_end;
801  }
802  }
803  }
804  if (avctx->channel_layout && avctx->channels) {
806  av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
807  ret = AVERROR(EINVAL);
808  goto free_and_end;
809  }
810  } else if (avctx->channel_layout) {
812  }
813  }
814 
815  if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
816  ret = avctx->codec->init(avctx);
817  if (ret < 0) {
818  goto free_and_end;
819  }
820  }
821 end:
823 
824  /* Release any user-supplied mutex. */
825  if (ff_lockmgr_cb) {
826  (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
827  }
828  if (options) {
829  av_dict_free(options);
830  *options = tmp;
831  }
832 
833  return ret;
834 free_and_end:
835  av_dict_free(&tmp);
836  av_freep(&avctx->priv_data);
837  av_freep(&avctx->internal);
838  avctx->codec= NULL;
839  goto end;
840 }
841 
842 int ff_alloc_packet(AVPacket *avpkt, int size)
843 {
844  if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
845  return AVERROR(EINVAL);
846 
847  if (avpkt->data) {
848  uint8_t *pkt_data;
849  int pkt_size;
850 
851  if (avpkt->size < size)
852  return AVERROR(EINVAL);
853 
854  pkt_data = avpkt->data;
855  pkt_size = avpkt->size;
856  av_init_packet(avpkt);
857  avpkt->data = pkt_data;
858  avpkt->size = pkt_size;
859  return 0;
860  } else {
861  return av_new_packet(avpkt, size);
862  }
863 }
864 
866  AVPacket *avpkt,
867  const AVFrame *frame,
868  int *got_packet_ptr)
869 {
870  int ret;
871  int user_packet = !!avpkt->data;
872  int nb_samples;
873 
874  if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
875  av_init_packet(avpkt);
876  avpkt->size = 0;
877  return 0;
878  }
879 
880  /* check for valid frame size */
881  if (frame) {
882  nb_samples = frame->nb_samples;
884  if (nb_samples > avctx->frame_size)
885  return AVERROR(EINVAL);
886  } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
887  if (nb_samples != avctx->frame_size)
888  return AVERROR(EINVAL);
889  }
890  } else {
891  nb_samples = avctx->frame_size;
892  }
893 
894  if (avctx->codec->encode2) {
895  *got_packet_ptr = 0;
896  ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
897  if (!ret && *got_packet_ptr &&
898  !(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
899  avpkt->pts = frame->pts;
900  avpkt->duration = av_rescale_q(frame->nb_samples,
901  (AVRational){ 1, avctx->sample_rate },
902  avctx->time_base);
903  }
904  } else {
905  /* for compatibility with encoders not supporting encode2(), we need to
906  allocate a packet buffer if the user has not provided one or check
907  the size otherwise */
908  int fs_tmp = 0;
909  int buf_size = avpkt->size;
910  if (!user_packet) {
911  if (avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE) {
912  av_assert0(av_get_bits_per_sample(avctx->codec_id) != 0);
913  buf_size = nb_samples * avctx->channels *
914  av_get_bits_per_sample(avctx->codec_id) / 8;
915  } else {
916  /* this is a guess as to the required size.
917  if an encoder needs more than this, it should probably
918  implement encode2() */
919  buf_size = 2 * avctx->frame_size * avctx->channels *
920  av_get_bytes_per_sample(avctx->sample_fmt);
921  buf_size += FF_MIN_BUFFER_SIZE;
922  }
923  }
924  if ((ret = ff_alloc_packet(avpkt, buf_size)))
925  return ret;
926 
927  /* Encoders using AVCodec.encode() that support
928  CODEC_CAP_SMALL_LAST_FRAME require avctx->frame_size to be set to
929  the smaller size when encoding the last frame.
930  This code can be removed once all encoders supporting
931  CODEC_CAP_SMALL_LAST_FRAME use encode2() */
932  if ((avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) &&
933  nb_samples < avctx->frame_size) {
934  fs_tmp = avctx->frame_size;
935  avctx->frame_size = nb_samples;
936  }
937 
938  /* encode the frame */
939  ret = avctx->codec->encode(avctx, avpkt->data, avpkt->size,
940  frame ? frame->data[0] : NULL);
941  if (ret >= 0) {
942  if (!ret) {
943  /* no output. if the packet data was allocated by libavcodec,
944  free it */
945  if (!user_packet)
946  av_freep(&avpkt->data);
947  } else {
948  if (avctx->coded_frame)
949  avpkt->pts = avctx->coded_frame->pts;
950  /* Set duration for final small packet. This can be removed
951  once all encoders supporting CODEC_CAP_SMALL_LAST_FRAME use
952  encode2() */
953  if (fs_tmp) {
954  avpkt->duration = av_rescale_q(avctx->frame_size,
955  (AVRational){ 1, avctx->sample_rate },
956  avctx->time_base);
957  }
958  }
959  avpkt->size = ret;
960  *got_packet_ptr = (ret > 0);
961  ret = 0;
962  }
963 
964  if (fs_tmp)
965  avctx->frame_size = fs_tmp;
966  }
967  if (!ret)
968  avctx->frame_number++;
969 
970  /* NOTE: if we add any audio encoders which output non-keyframe packets,
971  this needs to be moved to the encoders, but for now we can do it
972  here to simplify things */
973  avpkt->flags |= AV_PKT_FLAG_KEY;
974 
975  return ret;
976 }
977 
978 #if FF_API_OLD_DECODE_AUDIO
979 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
980  uint8_t *buf, int buf_size,
981  const short *samples)
982 {
983  AVPacket pkt;
984  AVFrame frame0;
985  AVFrame *frame;
986  int ret, samples_size, got_packet;
987 
988  av_init_packet(&pkt);
989  pkt.data = buf;
990  pkt.size = buf_size;
991 
992  if (samples) {
993  frame = &frame0;
995 
996  if (avctx->frame_size) {
997  frame->nb_samples = avctx->frame_size;
998  } else {
999  /* if frame_size is not set, the number of samples must be
1000  calculated from the buffer size */
1001  int64_t nb_samples;
1002  if (!av_get_bits_per_sample(avctx->codec_id)) {
1003  av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
1004  "support this codec\n");
1005  return AVERROR(EINVAL);
1006  }
1007  nb_samples = (int64_t)buf_size * 8 /
1008  (av_get_bits_per_sample(avctx->codec_id) *
1009  avctx->channels);
1010  if (nb_samples >= INT_MAX)
1011  return AVERROR(EINVAL);
1012  frame->nb_samples = nb_samples;
1013  }
1014 
1015  /* it is assumed that the samples buffer is large enough based on the
1016  relevant parameters */
1017  samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
1018  frame->nb_samples,
1019  avctx->sample_fmt, 1);
1020  if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
1021  avctx->sample_fmt,
1022  samples, samples_size, 1)))
1023  return ret;
1024 
1025  /* fabricate frame pts from sample count.
1026  this is needed because the avcodec_encode_audio() API does not have
1027  a way for the user to provide pts */
1028  frame->pts = av_rescale_q(avctx->internal->sample_count,
1029  (AVRational){ 1, avctx->sample_rate },
1030  avctx->time_base);
1031  avctx->internal->sample_count += frame->nb_samples;
1032  } else {
1033  frame = NULL;
1034  }
1035 
1036  got_packet = 0;
1037  ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
1038  if (!ret && got_packet && avctx->coded_frame) {
1039  avctx->coded_frame->pts = pkt.pts;
1040  avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1041  }
1042  /* free any side data since we cannot return it */
1043  if (pkt.side_data_elems > 0) {
1044  int i;
1045  for (i = 0; i < pkt.side_data_elems; i++)
1046  av_free(pkt.side_data[i].data);
1047  av_freep(&pkt.side_data);
1048  pkt.side_data_elems = 0;
1049  }
1050 
1051  if (frame && frame->extended_data != frame->data)
1052  av_free(frame->extended_data);
1053 
1054  return ret ? ret : pkt.size;
1055 }
1056 #endif
1057 
1058 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1059  const AVFrame *pict)
1060 {
1061  if(buf_size < FF_MIN_BUFFER_SIZE){
1062  av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
1063  return -1;
1064  }
1065  if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
1066  return -1;
1067  if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
1068  int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
1069  avctx->frame_number++;
1070  emms_c(); //needed to avoid an emms_c() call before every return;
1071 
1072  return ret;
1073  }else
1074  return 0;
1075 }
1076 
1077 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1078  const AVSubtitle *sub)
1079 {
1080  int ret;
1081  if(sub->start_display_time) {
1082  av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1083  return -1;
1084  }
1085  if(sub->num_rects == 0 || !sub->rects)
1086  return -1;
1087  ret = avctx->codec->encode(avctx, buf, buf_size, sub);
1088  avctx->frame_number++;
1089  return ret;
1090 }
1091 
1092 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1093 {
1094  int size = 0;
1095  const uint8_t *data;
1096  uint32_t flags;
1097 
1098  if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1099  return;
1100 
1101  data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1102  if (!data || size < 4)
1103  return;
1104  flags = bytestream_get_le32(&data);
1105  size -= 4;
1106  if (size < 4) /* Required for any of the changes */
1107  return;
1109  avctx->channels = bytestream_get_le32(&data);
1110  size -= 4;
1111  }
1113  if (size < 8)
1114  return;
1115  avctx->channel_layout = bytestream_get_le64(&data);
1116  size -= 8;
1117  }
1118  if (size < 4)
1119  return;
1121  avctx->sample_rate = bytestream_get_le32(&data);
1122  size -= 4;
1123  }
1125  if (size < 8)
1126  return;
1127  avctx->width = bytestream_get_le32(&data);
1128  avctx->height = bytestream_get_le32(&data);
1129  avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1130  size -= 8;
1131  }
1132 }
1133 
1135  int *got_picture_ptr,
1136  AVPacket *avpkt)
1137 {
1138  int ret;
1139 
1140  *got_picture_ptr= 0;
1141  if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1142  return -1;
1143 
1144  avctx->pkt = avpkt;
1145  apply_param_change(avctx, avpkt);
1146 
1147  if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
1149  ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1150  avpkt);
1151  else {
1152  ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1153  avpkt);
1154  picture->pkt_dts= avpkt->dts;
1155  picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1156  picture->width = avctx->width;
1157  picture->height = avctx->height;
1158  picture->format = avctx->pix_fmt;
1159  }
1160 
1161  emms_c(); //needed to avoid an emms_c() call before every return;
1162 
1163  if (*got_picture_ptr)
1164  avctx->frame_number++;
1165  }else
1166  ret= 0;
1167 
1168  return ret;
1169 }
1170 
1171 #if FF_API_OLD_DECODE_AUDIO
1172 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
1173  int *frame_size_ptr,
1174  AVPacket *avpkt)
1175 {
1176  AVFrame frame;
1177  int ret, got_frame = 0;
1178 
1179  if (avctx->get_buffer != avcodec_default_get_buffer) {
1180  av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
1181  "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
1182  av_log(avctx, AV_LOG_ERROR, "Please port your application to "
1183  "avcodec_decode_audio4()\n");
1185  }
1186 
1187  ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
1188 
1189  if (ret >= 0 && got_frame) {
1190  int ch, plane_size;
1191  int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
1192  int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
1193  frame.nb_samples,
1194  avctx->sample_fmt, 1);
1195  if (*frame_size_ptr < data_size) {
1196  av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
1197  "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
1198  return AVERROR(EINVAL);
1199  }
1200 
1201  memcpy(samples, frame.extended_data[0], plane_size);
1202 
1203  if (planar && avctx->channels > 1) {
1204  uint8_t *out = ((uint8_t *)samples) + plane_size;
1205  for (ch = 1; ch < avctx->channels; ch++) {
1206  memcpy(out, frame.extended_data[ch], plane_size);
1207  out += plane_size;
1208  }
1209  }
1210  *frame_size_ptr = data_size;
1211  } else {
1212  *frame_size_ptr = 0;
1213  }
1214  return ret;
1215 }
1216 #endif
1217 
1219  AVFrame *frame,
1220  int *got_frame_ptr,
1221  AVPacket *avpkt)
1222 {
1223  int ret = 0;
1224 
1225  *got_frame_ptr = 0;
1226 
1227  avctx->pkt = avpkt;
1228 
1229  if (!avpkt->data && avpkt->size) {
1230  av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1231  return AVERROR(EINVAL);
1232  }
1233 
1234  apply_param_change(avctx, avpkt);
1235 
1236  if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1237  ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1238  if (ret >= 0 && *got_frame_ptr) {
1239  avctx->frame_number++;
1240  frame->pkt_dts = avpkt->dts;
1241  if (frame->format == AV_SAMPLE_FMT_NONE)
1242  frame->format = avctx->sample_fmt;
1243  }
1244  }
1245  return ret;
1246 }
1247 
1249  int *got_sub_ptr,
1250  AVPacket *avpkt)
1251 {
1252  int ret;
1253 
1254  avctx->pkt = avpkt;
1255  *got_sub_ptr = 0;
1256  ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1257  if (*got_sub_ptr)
1258  avctx->frame_number++;
1259  return ret;
1260 }
1261 
1263 {
1264  int i;
1265 
1266  for (i = 0; i < sub->num_rects; i++)
1267  {
1268  av_freep(&sub->rects[i]->pict.data[0]);
1269  av_freep(&sub->rects[i]->pict.data[1]);
1270  av_freep(&sub->rects[i]->pict.data[2]);
1271  av_freep(&sub->rects[i]->pict.data[3]);
1272  av_freep(&sub->rects[i]->text);
1273  av_freep(&sub->rects[i]->ass);
1274  av_freep(&sub->rects[i]);
1275  }
1276 
1277  av_freep(&sub->rects);
1278 
1279  memset(sub, 0, sizeof(AVSubtitle));
1280 }
1281 
1283 {
1284  /* If there is a user-supplied mutex locking routine, call it. */
1285  if (ff_lockmgr_cb) {
1287  return -1;
1288  }
1289 
1291  if(entangled_thread_counter != 1){
1292  av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1294  return -1;
1295  }
1296 
1297  if (avcodec_is_open(avctx)) {
1298  if (HAVE_THREADS && avctx->thread_opaque)
1299  ff_thread_free(avctx);
1300  if (avctx->codec && avctx->codec->close)
1301  avctx->codec->close(avctx);
1303  avctx->coded_frame = NULL;
1304  av_freep(&avctx->internal);
1305  }
1306 
1307  if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
1308  av_opt_free(avctx->priv_data);
1309  av_opt_free(avctx);
1310  av_freep(&avctx->priv_data);
1311  if (codec_is_encoder(avctx->codec))
1312  av_freep(&avctx->extradata);
1313  avctx->codec = NULL;
1314  avctx->active_thread_type = 0;
1316 
1317  /* Release any user-supplied mutex. */
1318  if (ff_lockmgr_cb) {
1319  (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1320  }
1321  return 0;
1322 }
1323 
1325 {
1326  AVCodec *p, *experimental=NULL;
1327  p = first_avcodec;
1328  while (p) {
1329  if (codec_is_encoder(p) && p->id == id) {
1330  if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1331  experimental = p;
1332  } else
1333  return p;
1334  }
1335  p = p->next;
1336  }
1337  return experimental;
1338 }
1339 
1341 {
1342  AVCodec *p;
1343  if (!name)
1344  return NULL;
1345  p = first_avcodec;
1346  while (p) {
1347  if (codec_is_encoder(p) && strcmp(name,p->name) == 0)
1348  return p;
1349  p = p->next;
1350  }
1351  return NULL;
1352 }
1353 
1355 {
1356  AVCodec *p;
1357  p = first_avcodec;
1358  while (p) {
1359  if (codec_is_decoder(p) && p->id == id)
1360  return p;
1361  p = p->next;
1362  }
1363  return NULL;
1364 }
1365 
1367 {
1368  AVCodec *p;
1369  if (!name)
1370  return NULL;
1371  p = first_avcodec;
1372  while (p) {
1373  if (codec_is_decoder(p) && strcmp(name,p->name) == 0)
1374  return p;
1375  p = p->next;
1376  }
1377  return NULL;
1378 }
1379 
1381 {
1382  int bit_rate;
1383  int bits_per_sample;
1384 
1385  switch(ctx->codec_type) {
1386  case AVMEDIA_TYPE_VIDEO:
1387  case AVMEDIA_TYPE_DATA:
1388  case AVMEDIA_TYPE_SUBTITLE:
1390  bit_rate = ctx->bit_rate;
1391  break;
1392  case AVMEDIA_TYPE_AUDIO:
1393  bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1394  bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1395  break;
1396  default:
1397  bit_rate = 0;
1398  break;
1399  }
1400  return bit_rate;
1401 }
1402 
1403 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1404 {
1405  int i, len, ret = 0;
1406 
1407  for (i = 0; i < 4; i++) {
1408  len = snprintf(buf, buf_size,
1409  isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
1410  buf += len;
1411  buf_size = buf_size > len ? buf_size - len : 0;
1412  ret += len;
1413  codec_tag>>=8;
1414  }
1415  return ret;
1416 }
1417 
1418 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1419 {
1420  const char *codec_name;
1421  const char *profile = NULL;
1422  AVCodec *p;
1423  char buf1[32];
1424  int bitrate;
1425  AVRational display_aspect_ratio;
1426 
1427  if (encode)
1428  p = avcodec_find_encoder(enc->codec_id);
1429  else
1430  p = avcodec_find_decoder(enc->codec_id);
1431 
1432  if (p) {
1433  codec_name = p->name;
1434  profile = av_get_profile_name(p, enc->profile);
1435  } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1436  /* fake mpeg2 transport stream codec (currently not
1437  registered) */
1438  codec_name = "mpeg2ts";
1439  } else if (enc->codec_name[0] != '\0') {
1440  codec_name = enc->codec_name;
1441  } else {
1442  /* output avi tags */
1443  char tag_buf[32];
1444  av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1445  snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1446  codec_name = buf1;
1447  }
1448 
1449  switch(enc->codec_type) {
1450  case AVMEDIA_TYPE_VIDEO:
1451  snprintf(buf, buf_size,
1452  "Video: %s%s",
1453  codec_name, enc->mb_decision ? " (hq)" : "");
1454  if (profile)
1455  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1456  " (%s)", profile);
1457  if (enc->pix_fmt != PIX_FMT_NONE) {
1458  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1459  ", %s",
1461  }
1462  if (enc->width) {
1463  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1464  ", %dx%d",
1465  enc->width, enc->height);
1466  if (enc->sample_aspect_ratio.num) {
1467  av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1468  enc->width*enc->sample_aspect_ratio.num,
1469  enc->height*enc->sample_aspect_ratio.den,
1470  1024*1024);
1471  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1472  " [PAR %d:%d DAR %d:%d]",
1474  display_aspect_ratio.num, display_aspect_ratio.den);
1475  }
1476  if(av_log_get_level() >= AV_LOG_DEBUG){
1477  int g= av_gcd(enc->time_base.num, enc->time_base.den);
1478  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1479  ", %d/%d",
1480  enc->time_base.num/g, enc->time_base.den/g);
1481  }
1482  }
1483  if (encode) {
1484  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1485  ", q=%d-%d", enc->qmin, enc->qmax);
1486  }
1487  break;
1488  case AVMEDIA_TYPE_AUDIO:
1489  snprintf(buf, buf_size,
1490  "Audio: %s",
1491  codec_name);
1492  if (profile)
1493  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1494  " (%s)", profile);
1495  if (enc->sample_rate) {
1496  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1497  ", %d Hz", enc->sample_rate);
1498  }
1499  av_strlcat(buf, ", ", buf_size);
1500  av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1501  if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1502  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1503  ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1504  }
1505  break;
1506  case AVMEDIA_TYPE_DATA:
1507  snprintf(buf, buf_size, "Data: %s", codec_name);
1508  break;
1509  case AVMEDIA_TYPE_SUBTITLE:
1510  snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1511  break;
1513  snprintf(buf, buf_size, "Attachment: %s", codec_name);
1514  break;
1515  default:
1516  snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1517  return;
1518  }
1519  if (encode) {
1520  if (enc->flags & CODEC_FLAG_PASS1)
1521  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1522  ", pass 1");
1523  if (enc->flags & CODEC_FLAG_PASS2)
1524  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1525  ", pass 2");
1526  }
1527  bitrate = get_bit_rate(enc);
1528  if (bitrate != 0) {
1529  snprintf(buf + strlen(buf), buf_size - strlen(buf),
1530  ", %d kb/s", bitrate / 1000);
1531  }
1532 }
1533 
1534 const char *av_get_profile_name(const AVCodec *codec, int profile)
1535 {
1536  const AVProfile *p;
1537  if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1538  return NULL;
1539 
1540  for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1541  if (p->profile == profile)
1542  return p->name;
1543 
1544  return NULL;
1545 }
1546 
1547 unsigned avcodec_version( void )
1548 {
1549  return LIBAVCODEC_VERSION_INT;
1550 }
1551 
1552 const char *avcodec_configuration(void)
1553 {
1554  return LIBAV_CONFIGURATION;
1555 }
1556 
1557 const char *avcodec_license(void)
1558 {
1559 #define LICENSE_PREFIX "libavcodec license: "
1560  return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1561 }
1562 
1564 {
1566  ff_thread_flush(avctx);
1567  else if(avctx->codec->flush)
1568  avctx->codec->flush(avctx);
1569 }
1570 
1572 {
1573  AVCodecInternal *avci = s->internal;
1574  int i, j;
1575 
1576  if (!avci->buffer)
1577  return;
1578 
1579  if (avci->buffer_count)
1580  av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
1581  avci->buffer_count);
1582  for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1583  InternalBuffer *buf = &avci->buffer[i];
1584  for(j=0; j<4; j++){
1585  av_freep(&buf->base[j]);
1586  buf->data[j]= NULL;
1587  }
1588  }
1589  av_freep(&avci->buffer);
1590 
1591  avci->buffer_count=0;
1592 }
1593 
1595 {
1596  AVCodecInternal *avci = avctx->internal;
1597  InternalBuffer *buf;
1598 
1599  if (!avci->buffer)
1600  return;
1601  buf = avci->buffer;
1602 
1603  if (buf->extended_data) {
1604  av_free(buf->extended_data[0]);
1605  if (buf->extended_data != buf->data)
1606  av_free(buf->extended_data);
1607  }
1608  av_freep(&avci->buffer);
1609 }
1610 
1612 {
1613  switch (avctx->codec_type) {
1614  case AVMEDIA_TYPE_VIDEO:
1615  video_free_buffers(avctx);
1616  break;
1617  case AVMEDIA_TYPE_AUDIO:
1618  audio_free_buffers(avctx);
1619  break;
1620  default:
1621  break;
1622  }
1623 }
1624 
1625 #if FF_API_OLD_FF_PICT_TYPES
1626 char av_get_pict_type_char(int pict_type){
1627  return av_get_picture_type_char(pict_type);
1628 }
1629 #endif
1630 
1632  switch(codec_id){
1634  return 2;
1636  return 3;
1638  case CODEC_ID_ADPCM_CT:
1640  case CODEC_ID_ADPCM_IMA_QT:
1641  case CODEC_ID_ADPCM_SWF:
1642  case CODEC_ID_ADPCM_MS:
1643  case CODEC_ID_ADPCM_YAMAHA:
1644  case CODEC_ID_ADPCM_G722:
1645  return 4;
1646  case CODEC_ID_PCM_ALAW:
1647  case CODEC_ID_PCM_MULAW:
1648  case CODEC_ID_PCM_S8:
1649  case CODEC_ID_PCM_U8:
1650  case CODEC_ID_PCM_ZORK:
1651  return 8;
1652  case CODEC_ID_PCM_S16BE:
1653  case CODEC_ID_PCM_S16LE:
1655  case CODEC_ID_PCM_U16BE:
1656  case CODEC_ID_PCM_U16LE:
1657  return 16;
1658  case CODEC_ID_PCM_S24DAUD:
1659  case CODEC_ID_PCM_S24BE:
1660  case CODEC_ID_PCM_S24LE:
1661  case CODEC_ID_PCM_U24BE:
1662  case CODEC_ID_PCM_U24LE:
1663  return 24;
1664  case CODEC_ID_PCM_S32BE:
1665  case CODEC_ID_PCM_S32LE:
1666  case CODEC_ID_PCM_U32BE:
1667  case CODEC_ID_PCM_U32LE:
1668  case CODEC_ID_PCM_F32BE:
1669  case CODEC_ID_PCM_F32LE:
1670  return 32;
1671  case CODEC_ID_PCM_F64BE:
1672  case CODEC_ID_PCM_F64LE:
1673  return 64;
1674  default:
1675  return 0;
1676  }
1677 }
1678 
1679 #if FF_API_OLD_SAMPLE_FMT
1680 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1681  return av_get_bytes_per_sample(sample_fmt) << 3;
1682 }
1683 #endif
1684 
1685 #if !HAVE_THREADS
1687  return -1;
1688 }
1689 #endif
1690 
1691 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1692 {
1693  unsigned int n = 0;
1694 
1695  while(v >= 0xff) {
1696  *s++ = 0xff;
1697  v -= 0xff;
1698  n++;
1699  }
1700  *s = v;
1701  n++;
1702  return n;
1703 }
1704 
1705 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1706  int i;
1707  for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1708  return i;
1709 }
1710 
1711 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1712 {
1713  av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav "
1714  "version to the newest one from Git. If the problem still "
1715  "occurs, it means that your file has a feature which has not "
1716  "been implemented.\n", feature);
1717  if(want_sample)
1718  av_log_ask_for_sample(avc, NULL);
1719 }
1720 
1721 void av_log_ask_for_sample(void *avc, const char *msg, ...)
1722 {
1723  va_list argument_list;
1724 
1725  va_start(argument_list, msg);
1726 
1727  if (msg)
1728  av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
1729  av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1730  "of this file to ftp://upload.libav.org/incoming/ "
1731  "and contact the libav-devel mailing list.\n");
1732 
1733  va_end(argument_list);
1734 }
1735 
1737 
1739 {
1740  AVHWAccel **p = &first_hwaccel;
1741  while (*p)
1742  p = &(*p)->next;
1743  *p = hwaccel;
1744  hwaccel->next = NULL;
1745 }
1746 
1748 {
1749  return hwaccel ? hwaccel->next : first_hwaccel;
1750 }
1751 
1753 {
1754  AVHWAccel *hwaccel=NULL;
1755 
1756  while((hwaccel= av_hwaccel_next(hwaccel))){
1757  if ( hwaccel->id == codec_id
1758  && hwaccel->pix_fmt == pix_fmt)
1759  return hwaccel;
1760  }
1761  return NULL;
1762 }
1763 
1764 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1765 {
1766  if (ff_lockmgr_cb) {
1768  return -1;
1770  return -1;
1771  }
1772 
1773  ff_lockmgr_cb = cb;
1774 
1775  if (ff_lockmgr_cb) {
1777  return -1;
1779  return -1;
1780  }
1781  return 0;
1782 }
1783 
1785 {
1786  if (ff_lockmgr_cb) {
1788  return -1;
1789  }
1790  return 0;
1791 }
1792 
1794 {
1795  if (ff_lockmgr_cb) {
1797  return -1;
1798  }
1799  return 0;
1800 }
1801 
1802 unsigned int avpriv_toupper4(unsigned int x)
1803 {
1804  return toupper( x &0xFF)
1805  + (toupper((x>>8 )&0xFF)<<8 )
1806  + (toupper((x>>16)&0xFF)<<16)
1807  + (toupper((x>>24)&0xFF)<<24);
1808 }
1809 
1810 #if !HAVE_THREADS
1811 
1813 {
1814  f->owner = avctx;
1815  return avctx->get_buffer(avctx, f);
1816 }
1817 
1819 {
1820  f->owner->release_buffer(f->owner, f);
1821 }
1822 
1824 {
1825 }
1826 
1827 void ff_thread_report_progress(AVFrame *f, int progress, int field)
1828 {
1829 }
1830 
1831 void ff_thread_await_progress(AVFrame *f, int progress, int field)
1832 {
1833 }
1834 
1835 #endif
1836 
1837 #if FF_API_THREAD_INIT
1838 int avcodec_thread_init(AVCodecContext *s, int thread_count)
1839 {
1841  return ff_thread_init(s);
1842 }
1843 #endif
1844 
1846 {
1847  if (codec_id <= CODEC_ID_NONE)
1848  return AVMEDIA_TYPE_UNKNOWN;
1849  else if (codec_id < CODEC_ID_FIRST_AUDIO)
1850  return AVMEDIA_TYPE_VIDEO;
1851  else if (codec_id < CODEC_ID_FIRST_SUBTITLE)
1852  return AVMEDIA_TYPE_AUDIO;
1853  else if (codec_id < CODEC_ID_FIRST_UNKNOWN)
1854  return AVMEDIA_TYPE_SUBTITLE;
1855 
1856  return AVMEDIA_TYPE_UNKNOWN;
1857 }
1858 
1860 {
1861  return !!s->internal;
1862 }