FFmpeg
avcodec.c
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1 /*
2  * AVCodecContext functions for libavcodec
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * AVCodecContext functions for libavcodec
24  */
25 
26 #include "config.h"
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/bprint.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/mem.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/thread.h"
35 #include "avcodec.h"
36 #include "bsf.h"
37 #include "decode.h"
38 #include "encode.h"
39 #include "frame_thread_encoder.h"
40 #include "internal.h"
41 #include "thread.h"
42 
43 #include "libavutil/ffversion.h"
44 const char av_codec_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
45 
46 unsigned avcodec_version(void)
47 {
52 
54 }
55 
56 const char *avcodec_configuration(void)
57 {
58  return FFMPEG_CONFIGURATION;
59 }
60 
61 const char *avcodec_license(void)
62 {
63 #define LICENSE_PREFIX "libavcodec license: "
64  return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
65 }
66 
67 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
68 {
69  int i;
70 
71  for (i = 0; i < count; i++) {
72  int r = func(c, (char *)arg + i * size);
73  if (ret)
74  ret[i] = r;
75  }
76  emms_c();
77  return 0;
78 }
79 
80 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
81 {
82  int i;
83 
84  for (i = 0; i < count; i++) {
85  int r = func(c, arg, i, 0);
86  if (ret)
87  ret[i] = r;
88  }
89  emms_c();
90  return 0;
91 }
92 
94 
95 static void lock_avcodec(const AVCodec *codec)
96 {
97  if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
99 }
100 
101 static void unlock_avcodec(const AVCodec *codec)
102 {
103  if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
105 }
106 
108 {
109  int64_t bit_rate;
110  int bits_per_sample;
111 
112  switch (ctx->codec_type) {
113  case AVMEDIA_TYPE_VIDEO:
114  case AVMEDIA_TYPE_DATA:
117  bit_rate = ctx->bit_rate;
118  break;
119  case AVMEDIA_TYPE_AUDIO:
120  bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
121  if (bits_per_sample) {
122  bit_rate = ctx->sample_rate * (int64_t)ctx->channels;
123  if (bit_rate > INT64_MAX / bits_per_sample) {
124  bit_rate = 0;
125  } else
126  bit_rate *= bits_per_sample;
127  } else
128  bit_rate = ctx->bit_rate;
129  break;
130  default:
131  bit_rate = 0;
132  break;
133  }
134  return bit_rate;
135 }
136 
137 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
138 {
139  int ret = 0;
140  AVCodecInternal *avci;
141 
142  if (avcodec_is_open(avctx))
143  return 0;
144 
145  if (!codec && !avctx->codec) {
146  av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
147  return AVERROR(EINVAL);
148  }
149  if (codec && avctx->codec && codec != avctx->codec) {
150  av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
151  "but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
152  return AVERROR(EINVAL);
153  }
154  if (!codec)
155  codec = avctx->codec;
156 
157  if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
158  avctx->codec_id == AV_CODEC_ID_NONE) {
159  avctx->codec_type = codec->type;
160  avctx->codec_id = codec->id;
161  }
162  if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type &&
163  avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
164  av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
165  return AVERROR(EINVAL);
166  }
167  avctx->codec = codec;
168 
169  if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
170  return AVERROR(EINVAL);
171 
172  lock_avcodec(codec);
173 
174  avci = av_mallocz(sizeof(*avci));
175  if (!avci) {
176  ret = AVERROR(ENOMEM);
177  goto end;
178  }
179  avctx->internal = avci;
180 
181  avci->buffer_frame = av_frame_alloc();
182  avci->buffer_pkt = av_packet_alloc();
183  avci->es.in_frame = av_frame_alloc();
184  avci->ds.in_pkt = av_packet_alloc();
186  avci->pkt_props = av_fifo_alloc(sizeof(*avci->last_pkt_props));
187  if (!avci->buffer_frame || !avci->buffer_pkt ||
188  !avci->es.in_frame || !avci->ds.in_pkt ||
189  !avci->last_pkt_props || !avci->pkt_props) {
190  ret = AVERROR(ENOMEM);
191  goto free_and_end;
192  }
193 
194  avci->skip_samples_multiplier = 1;
195 
196  if (codec->priv_data_size > 0) {
197  if (!avctx->priv_data) {
198  avctx->priv_data = av_mallocz(codec->priv_data_size);
199  if (!avctx->priv_data) {
200  ret = AVERROR(ENOMEM);
201  goto free_and_end;
202  }
203  if (codec->priv_class) {
204  *(const AVClass **)avctx->priv_data = codec->priv_class;
206  }
207  }
208  if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, options)) < 0)
209  goto free_and_end;
210  } else {
211  avctx->priv_data = NULL;
212  }
213  if ((ret = av_opt_set_dict(avctx, options)) < 0)
214  goto free_and_end;
215 
216  if (avctx->codec_whitelist && av_match_list(codec->name, avctx->codec_whitelist, ',') <= 0) {
217  av_log(avctx, AV_LOG_ERROR, "Codec (%s) not on whitelist \'%s\'\n", codec->name, avctx->codec_whitelist);
218  ret = AVERROR(EINVAL);
219  goto free_and_end;
220  }
221 
222  // only call ff_set_dimensions() for non H.264/VP6F/DXV codecs so as not to overwrite previously setup dimensions
223  if (!(avctx->coded_width && avctx->coded_height && avctx->width && avctx->height &&
224  (avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_VP6F || avctx->codec_id == AV_CODEC_ID_DXV))) {
225  if (avctx->coded_width && avctx->coded_height)
226  ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
227  else if (avctx->width && avctx->height)
228  ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
229  if (ret < 0)
230  goto free_and_end;
231  }
232 
233  if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
234  && ( av_image_check_size2(avctx->coded_width, avctx->coded_height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0
235  || av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0)) {
236  av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
237  ff_set_dimensions(avctx, 0, 0);
238  }
239 
240  if (avctx->width > 0 && avctx->height > 0) {
241  if (av_image_check_sar(avctx->width, avctx->height,
242  avctx->sample_aspect_ratio) < 0) {
243  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
244  avctx->sample_aspect_ratio.num,
245  avctx->sample_aspect_ratio.den);
246  avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
247  }
248  }
249 
250  if (avctx->channels > FF_SANE_NB_CHANNELS || avctx->channels < 0) {
251  av_log(avctx, AV_LOG_ERROR, "Too many or invalid channels: %d\n", avctx->channels);
252  ret = AVERROR(EINVAL);
253  goto free_and_end;
254  }
255 
256  if (avctx->sample_rate < 0) {
257  av_log(avctx, AV_LOG_ERROR, "Invalid sample rate: %d\n", avctx->sample_rate);
258  ret = AVERROR(EINVAL);
259  goto free_and_end;
260  }
261  if (avctx->block_align < 0) {
262  av_log(avctx, AV_LOG_ERROR, "Invalid block align: %d\n", avctx->block_align);
263  ret = AVERROR(EINVAL);
264  goto free_and_end;
265  }
266 
267  avctx->frame_number = 0;
269 
270  if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&
272  const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
273  const AVCodec *codec2;
274  av_log(avctx, AV_LOG_ERROR,
275  "The %s '%s' is experimental but experimental codecs are not enabled, "
276  "add '-strict %d' if you want to use it.\n",
278  codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
279  if (!(codec2->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
280  av_log(avctx, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
281  codec_string, codec2->name);
283  goto free_and_end;
284  }
285 
286  if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
287  (!avctx->time_base.num || !avctx->time_base.den)) {
288  avctx->time_base.num = 1;
289  avctx->time_base.den = avctx->sample_rate;
290  }
291 
292  if (av_codec_is_encoder(avctx->codec))
293  ret = ff_encode_preinit(avctx);
294  else
295  ret = ff_decode_preinit(avctx);
296  if (ret < 0)
297  goto free_and_end;
298 
299  if (!HAVE_THREADS)
300  av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");
301 
302  if (CONFIG_FRAME_THREAD_ENCODER && av_codec_is_encoder(avctx->codec)) {
303  unlock_avcodec(codec); //we will instantiate a few encoders thus kick the counter to prevent false detection of a problem
305  lock_avcodec(codec);
306  if (ret < 0)
307  goto free_and_end;
308  }
309 
310  if (HAVE_THREADS
311  && !(avci->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) {
312  ret = ff_thread_init(avctx);
313  if (ret < 0) {
314  goto free_and_end;
315  }
316  }
317  if (!HAVE_THREADS && !(codec->caps_internal & FF_CODEC_CAP_AUTO_THREADS))
318  avctx->thread_count = 1;
319 
320  if (!(avctx->active_thread_type & FF_THREAD_FRAME) ||
321  avci->frame_thread_encoder) {
322  if (avctx->codec->init) {
323  ret = avctx->codec->init(avctx);
324  if (ret < 0) {
326  goto free_and_end;
327  }
328  }
329  avci->needs_close = 1;
330  }
331 
332  ret=0;
333 
334  if (av_codec_is_decoder(avctx->codec)) {
335  if (!avctx->bit_rate)
336  avctx->bit_rate = get_bit_rate(avctx);
337  /* validate channel layout from the decoder */
338  if (avctx->channel_layout) {
340  if (!avctx->channels)
341  avctx->channels = channels;
342  else if (channels != avctx->channels) {
343  char buf[512];
344  av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
345  av_log(avctx, AV_LOG_WARNING,
346  "Channel layout '%s' with %d channels does not match specified number of channels %d: "
347  "ignoring specified channel layout\n",
348  buf, channels, avctx->channels);
349  avctx->channel_layout = 0;
350  }
351  }
352  if (avctx->channels && avctx->channels < 0 ||
353  avctx->channels > FF_SANE_NB_CHANNELS) {
354  ret = AVERROR(EINVAL);
355  goto free_and_end;
356  }
357  if (avctx->bits_per_coded_sample < 0) {
358  ret = AVERROR(EINVAL);
359  goto free_and_end;
360  }
361 
362 #if FF_API_AVCTX_TIMEBASE
363  if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
364  avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
365 #endif
366  }
367  if (codec->priv_data_size > 0 && avctx->priv_data && codec->priv_class) {
368  av_assert0(*(const AVClass **)avctx->priv_data == codec->priv_class);
369  }
370 
371 end:
372  unlock_avcodec(codec);
373 
374  return ret;
375 free_and_end:
376  avcodec_close(avctx);
377  goto end;
378 }
379 
381 {
382  AVCodecInternal *avci = avctx->internal;
383 
384  if (av_codec_is_encoder(avctx->codec)) {
385  int caps = avctx->codec->capabilities;
386 
387  if (!(caps & AV_CODEC_CAP_ENCODER_FLUSH)) {
388  // Only encoders that explicitly declare support for it can be
389  // flushed. Otherwise, this is a no-op.
390  av_log(avctx, AV_LOG_WARNING, "Ignoring attempt to flush encoder "
391  "that doesn't support it\n");
392  return;
393  }
394 
395  // We haven't implemented flushing for frame-threaded encoders.
397  }
398 
399  avci->draining = 0;
400  avci->draining_done = 0;
401  avci->nb_draining_errors = 0;
404 
406  while (av_fifo_size(avci->pkt_props) >= sizeof(*avci->last_pkt_props)) {
408  avci->last_pkt_props, sizeof(*avci->last_pkt_props),
409  NULL);
411  }
412  av_fifo_reset(avci->pkt_props);
413 
414  av_frame_unref(avci->es.in_frame);
415  av_packet_unref(avci->ds.in_pkt);
416 
417  if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
418  ff_thread_flush(avctx);
419  else if (avctx->codec->flush)
420  avctx->codec->flush(avctx);
421 
422  avctx->pts_correction_last_pts =
423  avctx->pts_correction_last_dts = INT64_MIN;
424 
425  if (av_codec_is_decoder(avctx->codec))
426  av_bsf_flush(avci->bsf);
427 }
428 
430 {
431  int i;
432 
433  for (i = 0; i < sub->num_rects; i++) {
434  av_freep(&sub->rects[i]->data[0]);
435  av_freep(&sub->rects[i]->data[1]);
436  av_freep(&sub->rects[i]->data[2]);
437  av_freep(&sub->rects[i]->data[3]);
438  av_freep(&sub->rects[i]->text);
439  av_freep(&sub->rects[i]->ass);
440  av_freep(&sub->rects[i]);
441  }
442 
443  av_freep(&sub->rects);
444 
445  memset(sub, 0, sizeof(*sub));
446 }
447 
449 {
450  int i;
451 
452  if (!avctx)
453  return 0;
454 
455  if (avcodec_is_open(avctx)) {
456  AVCodecInternal *avci = avctx->internal;
457 
458  if (CONFIG_FRAME_THREAD_ENCODER &&
459  avci->frame_thread_encoder && avctx->thread_count > 1) {
461  }
462  if (HAVE_THREADS && avci->thread_ctx)
463  ff_thread_free(avctx);
464  if (avci->needs_close && avctx->codec->close)
465  avctx->codec->close(avctx);
466  avci->byte_buffer_size = 0;
467  av_freep(&avci->byte_buffer);
468  av_frame_free(&avci->buffer_frame);
469  av_packet_free(&avci->buffer_pkt);
470  if (avci->pkt_props) {
471  while (av_fifo_size(avci->pkt_props) >= sizeof(*avci->last_pkt_props)) {
474  sizeof(*avci->last_pkt_props), NULL);
475  }
476  av_fifo_freep(&avci->pkt_props);
477  }
479 
480  av_packet_free(&avci->ds.in_pkt);
481  av_frame_free(&avci->es.in_frame);
482 
483  av_buffer_unref(&avci->pool);
484 
485  if (avctx->hwaccel && avctx->hwaccel->uninit)
486  avctx->hwaccel->uninit(avctx);
487  av_freep(&avci->hwaccel_priv_data);
488 
489  av_bsf_free(&avci->bsf);
490 
491  av_freep(&avctx->internal);
492  }
493 
494  for (i = 0; i < avctx->nb_coded_side_data; i++)
495  av_freep(&avctx->coded_side_data[i].data);
496  av_freep(&avctx->coded_side_data);
497  avctx->nb_coded_side_data = 0;
498 
501 
502  if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
503  av_opt_free(avctx->priv_data);
504  av_opt_free(avctx);
505  av_freep(&avctx->priv_data);
506  if (av_codec_is_encoder(avctx->codec)) {
507  av_freep(&avctx->extradata);
508  avctx->extradata_size = 0;
509  } else if (av_codec_is_decoder(avctx->codec))
510  av_freep(&avctx->subtitle_header);
511 
512  avctx->codec = NULL;
513  avctx->active_thread_type = 0;
514 
515  return 0;
516 }
517 
518 static const char *unknown_if_null(const char *str)
519 {
520  return str ? str : "unknown";
521 }
522 
523 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
524 {
525  const char *codec_type;
526  const char *codec_name;
527  const char *profile = NULL;
528  AVBPrint bprint;
529  int64_t bitrate;
530  int new_line = 0;
531  AVRational display_aspect_ratio;
532  const char *separator = enc->dump_separator ? (const char *)enc->dump_separator : ", ";
533  const char *str;
534 
535  if (!buf || buf_size <= 0)
536  return;
537  av_bprint_init_for_buffer(&bprint, buf, buf_size);
539  codec_name = avcodec_get_name(enc->codec_id);
541 
542  av_bprintf(&bprint, "%s: %s", codec_type ? codec_type : "unknown",
543  codec_name);
544  buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
545 
546  if (enc->codec && strcmp(enc->codec->name, codec_name))
547  av_bprintf(&bprint, " (%s)", enc->codec->name);
548 
549  if (profile)
550  av_bprintf(&bprint, " (%s)", profile);
551  if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
553  && enc->refs)
554  av_bprintf(&bprint, ", %d reference frame%s",
555  enc->refs, enc->refs > 1 ? "s" : "");
556 
557  if (enc->codec_tag)
558  av_bprintf(&bprint, " (%s / 0x%04X)",
559  av_fourcc2str(enc->codec_tag), enc->codec_tag);
560 
561  switch (enc->codec_type) {
562  case AVMEDIA_TYPE_VIDEO:
563  {
564  unsigned len;
565 
566  av_bprintf(&bprint, "%s%s", separator,
567  enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :
569 
570  av_bprint_chars(&bprint, '(', 1);
571  len = bprint.len;
572 
573  /* The following check ensures that '(' has been written
574  * and therefore allows us to erase it if it turns out
575  * to be unnecessary. */
576  if (!av_bprint_is_complete(&bprint))
577  return;
578 
579  if (enc->bits_per_raw_sample && enc->pix_fmt != AV_PIX_FMT_NONE &&
581  av_bprintf(&bprint, "%d bpc, ", enc->bits_per_raw_sample);
582  if (enc->color_range != AVCOL_RANGE_UNSPECIFIED &&
584  av_bprintf(&bprint, "%s, ", str);
585 
586  if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||
589  const char *col = unknown_if_null(av_color_space_name(enc->colorspace));
591  const char *trc = unknown_if_null(av_color_transfer_name(enc->color_trc));
592  if (strcmp(col, pri) || strcmp(col, trc)) {
593  new_line = 1;
594  av_bprintf(&bprint, "%s/%s/%s, ", col, pri, trc);
595  } else
596  av_bprintf(&bprint, "%s, ", col);
597  }
598 
599  if (enc->field_order != AV_FIELD_UNKNOWN) {
600  const char *field_order = "progressive";
601  if (enc->field_order == AV_FIELD_TT)
602  field_order = "top first";
603  else if (enc->field_order == AV_FIELD_BB)
604  field_order = "bottom first";
605  else if (enc->field_order == AV_FIELD_TB)
606  field_order = "top coded first (swapped)";
607  else if (enc->field_order == AV_FIELD_BT)
608  field_order = "bottom coded first (swapped)";
609 
610  av_bprintf(&bprint, "%s, ", field_order);
611  }
612 
613  if (av_log_get_level() >= AV_LOG_VERBOSE &&
616  av_bprintf(&bprint, "%s, ", str);
617 
618  if (len == bprint.len) {
619  bprint.str[len - 1] = '\0';
620  bprint.len--;
621  } else {
622  if (bprint.len - 2 < bprint.size) {
623  /* Erase the last ", " */
624  bprint.len -= 2;
625  bprint.str[bprint.len] = '\0';
626  }
627  av_bprint_chars(&bprint, ')', 1);
628  }
629  }
630 
631  if (enc->width) {
632  av_bprintf(&bprint, "%s%dx%d", new_line ? separator : ", ",
633  enc->width, enc->height);
634 
635  if (av_log_get_level() >= AV_LOG_VERBOSE &&
636  (enc->width != enc->coded_width ||
637  enc->height != enc->coded_height))
638  av_bprintf(&bprint, " (%dx%d)",
639  enc->coded_width, enc->coded_height);
640 
641  if (enc->sample_aspect_ratio.num) {
642  av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
643  enc->width * (int64_t)enc->sample_aspect_ratio.num,
644  enc->height * (int64_t)enc->sample_aspect_ratio.den,
645  1024 * 1024);
646  av_bprintf(&bprint, " [SAR %d:%d DAR %d:%d]",
648  display_aspect_ratio.num, display_aspect_ratio.den);
649  }
650  if (av_log_get_level() >= AV_LOG_DEBUG) {
651  int g = av_gcd(enc->time_base.num, enc->time_base.den);
652  av_bprintf(&bprint, ", %d/%d",
653  enc->time_base.num / g, enc->time_base.den / g);
654  }
655  }
656  if (encode) {
657  av_bprintf(&bprint, ", q=%d-%d", enc->qmin, enc->qmax);
658  } else {
660  av_bprintf(&bprint, ", Closed Captions");
662  av_bprintf(&bprint, ", lossless");
663  }
664  break;
665  case AVMEDIA_TYPE_AUDIO:
666  av_bprintf(&bprint, "%s", separator);
667 
668  if (enc->sample_rate) {
669  av_bprintf(&bprint, "%d Hz, ", enc->sample_rate);
670  }
671  av_bprint_channel_layout(&bprint, enc->channels, enc->channel_layout);
672  if (enc->sample_fmt != AV_SAMPLE_FMT_NONE &&
674  av_bprintf(&bprint, ", %s", str);
675  }
676  if ( enc->bits_per_raw_sample > 0
678  av_bprintf(&bprint, " (%d bit)", enc->bits_per_raw_sample);
679  if (av_log_get_level() >= AV_LOG_VERBOSE) {
680  if (enc->initial_padding)
681  av_bprintf(&bprint, ", delay %d", enc->initial_padding);
682  if (enc->trailing_padding)
683  av_bprintf(&bprint, ", padding %d", enc->trailing_padding);
684  }
685  break;
686  case AVMEDIA_TYPE_DATA:
687  if (av_log_get_level() >= AV_LOG_DEBUG) {
688  int g = av_gcd(enc->time_base.num, enc->time_base.den);
689  if (g)
690  av_bprintf(&bprint, ", %d/%d",
691  enc->time_base.num / g, enc->time_base.den / g);
692  }
693  break;
695  if (enc->width)
696  av_bprintf(&bprint, ", %dx%d", enc->width, enc->height);
697  break;
698  default:
699  return;
700  }
701  if (encode) {
702  if (enc->flags & AV_CODEC_FLAG_PASS1)
703  av_bprintf(&bprint, ", pass 1");
704  if (enc->flags & AV_CODEC_FLAG_PASS2)
705  av_bprintf(&bprint, ", pass 2");
706  }
707  bitrate = get_bit_rate(enc);
708  if (bitrate != 0) {
709  av_bprintf(&bprint, ", %"PRId64" kb/s", bitrate / 1000);
710  } else if (enc->rc_max_rate > 0) {
711  av_bprintf(&bprint, ", max. %"PRId64" kb/s", enc->rc_max_rate / 1000);
712  }
713 }
714 
716 {
717  return !!s->internal;
718 }
AVSubtitle
Definition: avcodec.h:2283
avcodec_close
av_cold int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: avcodec.c:448
func
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:68
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:404
AVCodecContext::hwaccel
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1355
AVCodec
AVCodec.
Definition: codec.h:197
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:142
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
AVERROR_EXPERIMENTAL
#define AVERROR_EXPERIMENTAL
Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
Definition: error.h:74
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
AVCodecContext::channel_layout
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1039
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:956
av_opt_set_defaults
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1358
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1281
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:988
AVCodec::priv_class
const AVClass * priv_class
AVClass for the private context.
Definition: codec.h:223
sub
static float sub(float src0, float src1)
Definition: dnn_backend_native_layer_mathbinary.c:31
thread.h
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
ff_thread_flush
void ff_thread_flush(AVCodecContext *avctx)
Wait for decoding threads to finish and reset internal state.
Definition: pthread_frame.c:943
AVCodecInternal::es
EncodeSimpleContext es
Definition: internal.h:167
avcodec_string
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
Definition: avcodec.c:523
AVCodecContext::coded_side_data
AVPacketSideData * coded_side_data
Additional data associated with the entire coded stream.
Definition: avcodec.h:1828
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
profile
mfxU16 profile
Definition: qsvenc.c:45
avcodec_find_encoder
const AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
Definition: allcodecs.c:910
av_get_channel_layout_string
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
Definition: channel_layout.c:217
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:949
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: codec.h:216
internal.h
AVComponentDescriptor::depth
int depth
Number of bits in the component.
Definition: pixdesc.h:57
AVCodecContext::field_order
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:985
AVCodecInternal::frame_thread_encoder
void * frame_thread_encoder
Definition: internal.h:165
encode.h
AVCOL_TRC_UNSPECIFIED
@ AVCOL_TRC_UNSPECIFIED
Definition: pixfmt.h:476
unknown_if_null
static const char * unknown_if_null(const char *str)
Definition: avcodec.c:518
AVCodecContext::subtitle_header
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:1679
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
AV_CODEC_ID_ADPCM_G722
@ AV_CODEC_ID_ADPCM_G722
Definition: codec_id.h:380
AVDictionary
Definition: dict.c:30
avcodec_profile_name
const char * avcodec_profile_name(enum AVCodecID codec_id, int profile)
Return a name for the specified profile, if available.
Definition: utils.c:481
ff_thread_init
int ff_thread_init(AVCodecContext *avctx)
Definition: pthread.c:70
av_fifo_generic_read
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
Definition: fifo.c:213
avcodec_is_open
int avcodec_is_open(AVCodecContext *s)
Definition: avcodec.c:715
AVCodec::flush
void(* flush)(struct AVCodecContext *)
Flush buffers.
Definition: codec.h:325
AVCodecContext::qmax
int qmax
maximum quantizer
Definition: avcodec.h:1161
codec_type
enum AVMediaType codec_type
Definition: rtp.c:37
av_fifo_reset
void av_fifo_reset(AVFifoBuffer *f)
Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
Definition: fifo.c:71
thread.h
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:70
av_chroma_location_name
const char * av_chroma_location_name(enum AVChromaLocation location)
Definition: pixdesc.c:2949
AVCodecInternal::pool
AVBufferRef * pool
Definition: internal.h:145
av_gcd
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:36
AV_CODEC_ID_SRT
@ AV_CODEC_ID_SRT
Definition: codec_id.h:528
ff_mutex_unlock
static int ff_mutex_unlock(AVMutex *mutex)
Definition: thread.h:169
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:1706
EncodeSimpleContext::in_frame
AVFrame * in_frame
Definition: internal.h:127
AV_FIELD_TT
@ AV_FIELD_TT
Definition: codec_par.h:39
bsf.h
av_color_space_name
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:2928
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:388
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1436
get_bit_rate
static int64_t get_bit_rate(AVCodecContext *ctx)
Definition: avcodec.c:107
AVCodecContext::initial_padding
int initial_padding
Audio only.
Definition: avcodec.h:1697
AVCodecContext::refs
int refs
number of reference frames
Definition: avcodec.h:928
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:459
unlock_avcodec
static void unlock_avcodec(const AVCodec *codec)
Definition: avcodec.c:101
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:567
AV_CODEC_CAP_ENCODER_FLUSH
#define AV_CODEC_CAP_ENCODER_FLUSH
This encoder can be flushed using avcodec_flush_buffers().
Definition: codec.h:178
AV_FIELD_TB
@ AV_FIELD_TB
Definition: codec_par.h:41
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVRational::num
int num
Numerator.
Definition: rational.h:59
av_image_check_size2
int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of a plane of an image with...
Definition: imgutils.c:289
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: avcodec.c:429
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:99
AVFormatContext::bit_rate
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1216
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:585
avassert.h
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:942
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
frame_thread_encoder.h
AV_CODEC_CAP_EXPERIMENTAL
#define AV_CODEC_CAP_EXPERIMENTAL
Codec is experimental and is thus avoided in favor of non experimental encoders.
Definition: codec.h:100
av_cold
#define av_cold
Definition: attributes.h:90
FF_CODEC_PROPERTY_LOSSLESS
#define FF_CODEC_PROPERTY_LOSSLESS
Definition: avcodec.h:1819
LIBAVCODEC_VERSION_MICRO
#define LIBAVCODEC_VERSION_MICRO
Definition: version.h:32
AVMutex
#define AVMutex
Definition: thread.h:164
av_opt_set_dict
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1656
ff_frame_thread_encoder_free
void ff_frame_thread_encoder_free(AVCodecContext *avctx)
Definition: frame_thread_encoder.c:242
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:481
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVCodecInternal::buffer_pkt
AVPacket * buffer_pkt
buffers for using new encode/decode API through legacy API
Definition: internal.h:193
AVHWAccel::uninit
int(* uninit)(AVCodecContext *avctx)
Uninitialize the hwaccel private data.
Definition: avcodec.h:2171
g
const char * g
Definition: vf_curves.c:117
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_bprint_channel_layout
void av_bprint_channel_layout(struct AVBPrint *bp, int nb_channels, uint64_t channel_layout)
Append a description of a channel layout to a bprint buffer.
Definition: channel_layout.c:183
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_FIELD_UNKNOWN
@ AV_FIELD_UNKNOWN
Definition: codec_par.h:37
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1421
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
AVPacketSideData::data
uint8_t * data
Definition: packet.h:315
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:33
decode.h
AVCodecContext::max_pixels
int64_t max_pixels
The number of pixels per image to maximally accept.
Definition: avcodec.h:1880
AVCodecContext::rc_max_rate
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:1190
av_get_sample_fmt_name
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
AVCodecInternal::ds
DecodeSimpleContext ds
Definition: internal.h:149
AVCOL_PRI_UNSPECIFIED
@ AVCOL_PRI_UNSPECIFIED
Definition: pixfmt.h:451
AV_FIELD_BT
@ AV_FIELD_BT
Definition: codec_par.h:42
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
ff_thread_free
void ff_thread_free(AVCodecContext *avctx)
Definition: pthread.c:82
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:389
arg
const char * arg
Definition: jacosubdec.c:67
if
if(ret)
Definition: filter_design.txt:179
av_color_range_name
const char * av_color_range_name(enum AVColorRange range)
Definition: pixdesc.c:2868
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:435
LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_VERSION_INT
Definition: version.h:34
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_match_list
int av_match_list(const char *name, const char *list, char separator)
Check if a name is in a list.
Definition: avstring.c:452
AVCodecContext::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:963
av_buffer_unref
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
Definition: buffer.c:125
AVCodec::type
enum AVMediaType type
Definition: codec.h:210
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVCodecContext::nb_coded_side_data
int nb_coded_side_data
Definition: avcodec.h:1829
AVCodecContext::internal
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:414
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:429
AVCodecContext::trailing_padding
int trailing_padding
Audio only.
Definition: avcodec.h:1872
av_color_primaries_name
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2886
avcodec_license
const char * avcodec_license(void)
Return the libavcodec license.
Definition: avcodec.c:61
av_opt_free
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1611
avcodec_open2
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:137
avcodec_version
unsigned avcodec_version(void)
Return the LIBAVCODEC_VERSION_INT constant.
Definition: avcodec.c:46
AVCodecInternal::skip_samples_multiplier
int skip_samples_multiplier
Definition: internal.h:199
AVCodecInternal::draining_done
int draining_done
Definition: internal.h:195
AVCodecInternal::bsf
AVBSFContext * bsf
Definition: internal.h:150
AVCOL_RANGE_UNSPECIFIED
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:542
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
av_get_channel_layout_nb_channels
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
Definition: channel_layout.c:226
AVCodecInternal::last_pkt_props
AVPacket * last_pkt_props
Properties (timestamps+side data) extracted from the last packet passed for decoding.
Definition: internal.h:156
av_bprint_is_complete
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
avcodec_find_decoder
const AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:915
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:502
av_codec_is_decoder
int av_codec_is_decoder(const AVCodec *codec)
Definition: utils.c:81
FF_CODEC_CAP_AUTO_THREADS
#define FF_CODEC_CAP_AUTO_THREADS
Codec handles avctx->thread_count == 0 (auto) internally.
Definition: internal.h:81
options
const OptionDef options[]
AVCodecInternal::hwaccel_priv_data
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:183
AVCodec::close
int(* close)(struct AVCodecContext *)
Definition: codec.h:307
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: codec_id.h:241
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:996
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AV_MUTEX_INITIALIZER
#define AV_MUTEX_INITIALIZER
Definition: thread.h:165
size
int size
Definition: twinvq_data.h:10344
AVCodecInternal::byte_buffer
uint8_t * byte_buffer
temporary buffer used for encoders to store their bitstream
Definition: internal.h:162
AVCHROMA_LOC_UNSPECIFIED
@ AVCHROMA_LOC_UNSPECIFIED
Definition: pixfmt.h:596
AVMEDIA_TYPE_UNKNOWN
@ AVMEDIA_TYPE_UNKNOWN
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:200
codec_mutex
static AVMutex codec_mutex
Definition: avcodec.c:93
AV_CODEC_FLAG_PASS2
#define AV_CODEC_FLAG_PASS2
Use internal 2pass ratecontrol in second pass mode.
Definition: avcodec.h:235
encode
static void encode(AVCodecContext *ctx, AVFrame *frame, AVPacket *pkt, FILE *output)
Definition: encode_audio.c:95
lock_avcodec
static void lock_avcodec(const AVCodec *codec)
Definition: avcodec.c:95
AVCodecContext::pts_correction_last_pts
int64_t pts_correction_last_pts
Number of incorrect DTS values so far.
Definition: avcodec.h:1736
avcodec_default_execute
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
Definition: avcodec.c:67
ff_mutex_lock
static int ff_mutex_lock(AVMutex *mutex)
Definition: thread.h:168
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:59
AVCodecInternal
Definition: internal.h:130
AVCodecInternal::byte_buffer_size
unsigned int byte_buffer_size
Definition: internal.h:163
bitrate
int64_t bitrate
Definition: h264_levels.c:131
ff_encode_preinit
int ff_encode_preinit(AVCodecContext *avctx)
Definition: encode.c:413
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1447
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:989
av_bprint_init_for_buffer
void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size)
Init a print buffer using a pre-existing buffer.
Definition: bprint.c:84
AVCodec::id
enum AVCodecID id
Definition: codec.h:211
av_codec_is_encoder
int av_codec_is_encoder(const AVCodec *codec)
Definition: utils.c:76
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:448
AV_FIELD_BB
@ AV_FIELD_BB
Definition: codec_par.h:40
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1414
bprint.h
i
int i
Definition: input.c:406
avcodec_default_execute2
int avcodec_default_execute2(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
Definition: avcodec.c:80
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
AVCodecContext::properties
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:1818
av_get_bytes_per_sample
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:480
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:50
AVCodecInternal::pkt_props
AVFifoBuffer * pkt_props
Definition: internal.h:157
AVCodecContext::pts_correction_last_dts
int64_t pts_correction_last_dts
PTS of the last frame.
Definition: avcodec.h:1737
ff_decode_preinit
int ff_decode_preinit(AVCodecContext *avctx)
Perform decoder initialization and validation.
Definition: decode.c:1763
AVMEDIA_TYPE_ATTACHMENT
@ AVMEDIA_TYPE_ATTACHMENT
Opaque data information usually sparse.
Definition: avutil.h:205
AVCodecContext::dump_separator
uint8_t * dump_separator
dump format separator.
Definition: avcodec.h:1803
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:437
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AVCodecContext::hw_device_ctx
AVBufferRef * hw_device_ctx
A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/d...
Definition: avcodec.h:1902
AVCodecContext::chroma_sample_location
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:970
len
int len
Definition: vorbis_enc_data.h:426
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:505
AVCodecContext::height
int height
Definition: avcodec.h:552
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:589
AVCodecInternal::nb_draining_errors
int nb_draining_errors
Definition: internal.h:202
AVCodec::priv_data_size
int priv_data_size
Definition: codec.h:245
AVCodecContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.
Definition: avcodec.h:1853
avcodec.h
ret
ret
Definition: filter_design.txt:187
AVCodec::caps_internal
int caps_internal
Internal codec capabilities.
Definition: codec.h:330
AVCodecContext::block_align
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
Definition: avcodec.h:1025
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:380
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1276
LICENSE_PREFIX
#define LICENSE_PREFIX
av_bprintf
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:93
AVCodecInternal::needs_close
int needs_close
If this is set, then AVCodec->close (if existing) needs to be called for the parent AVCodecContext.
Definition: internal.h:173
av_bsf_flush
void av_bsf_flush(AVBSFContext *ctx)
Reset the internal bitstream filter state.
Definition: bsf.c:186
av_get_media_type_string
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
AVCodecContext
main external API structure.
Definition: avcodec.h:379
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1455
AVCodecContext::codec_descriptor
const AVCodecDescriptor * codec_descriptor
AVCodecDescriptor.
Definition: avcodec.h:1727
c2
static const uint64_t c2
Definition: murmur3.c:52
channel_layout.h
AVCodecContext::qmin
int qmin
minimum quantizer
Definition: avcodec.h:1154
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:1521
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:105
FF_CODEC_PROPERTY_CLOSED_CAPTIONS
#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS
Definition: avcodec.h:1820
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AVCodecInternal::buffer_frame
AVFrame * buffer_frame
Definition: internal.h:194
AVCodecInternal::draining
int draining
checks API usage: after codec draining, flush is required to resume operation
Definition: internal.h:188
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:567
AVCodecContext::codec_type
enum AVMediaType codec_type
Definition: avcodec.h:387
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_codec_ffversion
const char av_codec_ffversion[]
Definition: avcodec.c:44
mem.h
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:86
av_fifo_size
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
AVCodecContext::frame_number
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1019
av_fifo_freep
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:404
FF_MAX_EXTRADATA_SIZE
#define FF_MAX_EXTRADATA_SIZE
Maximum size in bytes of extradata.
Definition: internal.h:235
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:406
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_bsf_free
void av_bsf_free(AVBSFContext **pctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
Definition: bsf.c:40
avcodec_configuration
const char * avcodec_configuration(void)
Return the libavcodec build-time configuration.
Definition: avcodec.c:56
AVCodec::init
int(* init)(struct AVCodecContext *)
Definition: codec.h:278
codec_string
Definition: dashenc.c:202
AVCodecInternal::thread_ctx
void * thread_ctx
Definition: internal.h:147
AV_CODEC_ID_PCM_S8_PLANAR
@ AV_CODEC_ID_PCM_S8_PLANAR
Definition: codec_id.h:340
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:552
convert_header.str
string str
Definition: convert_header.py:20
av_fifo_alloc
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
Definition: fifo.c:43
imgutils.h
DecodeSimpleContext::in_pkt
AVPacket * in_pkt
Definition: internal.h:123
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avcodec_descriptor_get
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3507
av_image_check_sar
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
Check if the given sample aspect ratio of an image is valid.
Definition: imgutils.c:323
avstring.h
FF_SANE_NB_CHANNELS
#define FF_SANE_NB_CHANNELS
Definition: internal.h:108
AVCodecContext::codec_whitelist
char * codec_whitelist
',' separated list of allowed decoders.
Definition: avcodec.h:1811
av_color_transfer_name
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2907
AVCodecContext::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
Definition: avcodec.h:749
av_bprint_chars
void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
Append char c n times to a print buffer.
Definition: bprint.c:139
av_get_pix_fmt_name
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2460
AV_CODEC_FLAG_PASS1
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:231
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
ff_frame_thread_encoder_init
int ff_frame_thread_encoder_init(AVCodecContext *avctx)
Definition: frame_thread_encoder.c:125