FFmpeg
decode.c
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1 /*
2  * generic decoding-related code
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 #include <stdint.h>
22 #include <string.h>
23 
24 #include "config.h"
25 
26 #if CONFIG_ICONV
27 # include <iconv.h>
28 #endif
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33 #include "libavutil/common.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/hwcontext.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/intmath.h"
39 #include "libavutil/opt.h"
40 
41 #include "avcodec.h"
42 #include "bytestream.h"
43 #include "decode.h"
44 #include "hwconfig.h"
45 #include "internal.h"
46 #include "packet_internal.h"
47 #include "thread.h"
48 
49 typedef struct FramePool {
50  /**
51  * Pools for each data plane. For audio all the planes have the same size,
52  * so only pools[0] is used.
53  */
55 
56  /*
57  * Pool parameters
58  */
59  int format;
60  int width, height;
62  int linesize[4];
63  int planes;
64  int channels;
65  int samples;
66 } FramePool;
67 
68 static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
69 {
70  int size, ret;
71  const uint8_t *data;
72  uint32_t flags;
73  int64_t val;
74 
76  if (!data)
77  return 0;
78 
79  if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) {
80  av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter "
81  "changes, but PARAM_CHANGE side data was sent to it.\n");
82  ret = AVERROR(EINVAL);
83  goto fail2;
84  }
85 
86  if (size < 4)
87  goto fail;
88 
89  flags = bytestream_get_le32(&data);
90  size -= 4;
91 
93  if (size < 4)
94  goto fail;
95  val = bytestream_get_le32(&data);
96  if (val <= 0 || val > INT_MAX) {
97  av_log(avctx, AV_LOG_ERROR, "Invalid channel count");
98  ret = AVERROR_INVALIDDATA;
99  goto fail2;
100  }
101  avctx->channels = val;
102  size -= 4;
103  }
105  if (size < 8)
106  goto fail;
107  avctx->channel_layout = bytestream_get_le64(&data);
108  size -= 8;
109  }
111  if (size < 4)
112  goto fail;
113  val = bytestream_get_le32(&data);
114  if (val <= 0 || val > INT_MAX) {
115  av_log(avctx, AV_LOG_ERROR, "Invalid sample rate");
116  ret = AVERROR_INVALIDDATA;
117  goto fail2;
118  }
119  avctx->sample_rate = val;
120  size -= 4;
121  }
123  if (size < 8)
124  goto fail;
125  avctx->width = bytestream_get_le32(&data);
126  avctx->height = bytestream_get_le32(&data);
127  size -= 8;
128  ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
129  if (ret < 0)
130  goto fail2;
131  }
132 
133  return 0;
134 fail:
135  av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n");
136  ret = AVERROR_INVALIDDATA;
137 fail2:
138  if (ret < 0) {
139  av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n");
140  if (avctx->err_recognition & AV_EF_EXPLODE)
141  return ret;
142  }
143  return 0;
144 }
145 
146 #define IS_EMPTY(pkt) (!(pkt)->data)
147 
149 {
150  int ret = 0;
151 
152  ret = avpriv_packet_list_put(&avci->pkt_props, &avci->pkt_props_tail, pkt,
154  if (ret < 0)
155  return ret;
156  avci->pkt_props_tail->pkt.size = pkt->size; // HACK: Needed for ff_decode_frame_props().
157  avci->pkt_props_tail->pkt.data = (void*)1; // HACK: Needed for IS_EMPTY().
158 
159  if (IS_EMPTY(avci->last_pkt_props)) {
160  ret = avpriv_packet_list_get(&avci->pkt_props,
161  &avci->pkt_props_tail,
162  avci->last_pkt_props);
163  av_assert0(ret != AVERROR(EAGAIN));
164  }
165  return ret;
166 }
167 
169 {
170  int ret;
171 
172  /* move the original frame to our backup */
173  av_frame_unref(avci->to_free);
174  av_frame_move_ref(avci->to_free, frame);
175 
176  /* now copy everything except the AVBufferRefs back
177  * note that we make a COPY of the side data, so calling av_frame_free() on
178  * the caller's frame will work properly */
179  ret = av_frame_copy_props(frame, avci->to_free);
180  if (ret < 0)
181  return ret;
182 
183  memcpy(frame->data, avci->to_free->data, sizeof(frame->data));
184  memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize));
185  if (avci->to_free->extended_data != avci->to_free->data) {
186  int planes = avci->to_free->channels;
187  int size = planes * sizeof(*frame->extended_data);
188 
189  if (!size) {
190  av_frame_unref(frame);
191  return AVERROR_BUG;
192  }
193 
194  frame->extended_data = av_malloc(size);
195  if (!frame->extended_data) {
196  av_frame_unref(frame);
197  return AVERROR(ENOMEM);
198  }
199  memcpy(frame->extended_data, avci->to_free->extended_data,
200  size);
201  } else
202  frame->extended_data = frame->data;
203 
204  frame->format = avci->to_free->format;
205  frame->width = avci->to_free->width;
206  frame->height = avci->to_free->height;
207  frame->channel_layout = avci->to_free->channel_layout;
208  frame->nb_samples = avci->to_free->nb_samples;
209  frame->channels = avci->to_free->channels;
210 
211  return 0;
212 }
213 
215 {
216  AVCodecInternal *avci = avctx->internal;
217  int ret;
218 
219  if (avci->bsf)
220  return 0;
221 
222  ret = av_bsf_list_parse_str(avctx->codec->bsfs, &avci->bsf);
223  if (ret < 0) {
224  av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", avctx->codec->bsfs, av_err2str(ret));
225  if (ret != AVERROR(ENOMEM))
226  ret = AVERROR_BUG;
227  goto fail;
228  }
229 
230  /* We do not currently have an API for passing the input timebase into decoders,
231  * but no filters used here should actually need it.
232  * So we make up some plausible-looking number (the MPEG 90kHz timebase) */
233  avci->bsf->time_base_in = (AVRational){ 1, 90000 };
234  ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx);
235  if (ret < 0)
236  goto fail;
237 
238  ret = av_bsf_init(avci->bsf);
239  if (ret < 0)
240  goto fail;
241 
242  return 0;
243 fail:
244  av_bsf_free(&avci->bsf);
245  return ret;
246 }
247 
249 {
250  AVCodecInternal *avci = avctx->internal;
251  int ret;
252 
253  if (avci->draining)
254  return AVERROR_EOF;
255 
256  ret = av_bsf_receive_packet(avci->bsf, pkt);
257  if (ret == AVERROR_EOF)
258  avci->draining = 1;
259  if (ret < 0)
260  return ret;
261 
262  ret = extract_packet_props(avctx->internal, pkt);
263  if (ret < 0)
264  goto finish;
265 
266  ret = apply_param_change(avctx, pkt);
267  if (ret < 0)
268  goto finish;
269 
270  if (avctx->codec->receive_frame)
271  avci->compat_decode_consumed += pkt->size;
272 
273  return 0;
274 finish:
275  av_packet_unref(pkt);
276  return ret;
277 }
278 
279 /**
280  * Attempt to guess proper monotonic timestamps for decoded video frames
281  * which might have incorrect times. Input timestamps may wrap around, in
282  * which case the output will as well.
283  *
284  * @param pts the pts field of the decoded AVPacket, as passed through
285  * AVFrame.pts
286  * @param dts the dts field of the decoded AVPacket
287  * @return one of the input values, may be AV_NOPTS_VALUE
288  */
290  int64_t reordered_pts, int64_t dts)
291 {
292  int64_t pts = AV_NOPTS_VALUE;
293 
294  if (dts != AV_NOPTS_VALUE) {
296  ctx->pts_correction_last_dts = dts;
297  } else if (reordered_pts != AV_NOPTS_VALUE)
298  ctx->pts_correction_last_dts = reordered_pts;
299 
300  if (reordered_pts != AV_NOPTS_VALUE) {
301  ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
302  ctx->pts_correction_last_pts = reordered_pts;
303  } else if(dts != AV_NOPTS_VALUE)
304  ctx->pts_correction_last_pts = dts;
305 
307  && reordered_pts != AV_NOPTS_VALUE)
308  pts = reordered_pts;
309  else
310  pts = dts;
311 
312  return pts;
313 }
314 
315 /*
316  * The core of the receive_frame_wrapper for the decoders implementing
317  * the simple API. Certain decoders might consume partial packets without
318  * returning any output, so this function needs to be called in a loop until it
319  * returns EAGAIN.
320  **/
321 static inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
322 {
323  AVCodecInternal *avci = avctx->internal;
324  DecodeSimpleContext *ds = &avci->ds;
325  AVPacket *pkt = ds->in_pkt;
326  // copy to ensure we do not change pkt
327  int got_frame, actual_got_frame;
328  int ret;
329 
330  if (!pkt->data && !avci->draining) {
331  av_packet_unref(pkt);
332  ret = ff_decode_get_packet(avctx, pkt);
333  if (ret < 0 && ret != AVERROR_EOF)
334  return ret;
335  }
336 
337  // Some codecs (at least wma lossless) will crash when feeding drain packets
338  // after EOF was signaled.
339  if (avci->draining_done)
340  return AVERROR_EOF;
341 
342  if (!pkt->data &&
343  !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
345  return AVERROR_EOF;
346 
347  got_frame = 0;
348 
349  if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) {
350  ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt);
351  } else {
352  ret = avctx->codec->decode(avctx, frame, &got_frame, pkt);
353 
355  frame->pkt_dts = pkt->dts;
356  if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
357  if(!avctx->has_b_frames)
358  frame->pkt_pos = pkt->pos;
359  //FIXME these should be under if(!avctx->has_b_frames)
360  /* get_buffer is supposed to set frame parameters */
361  if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) {
362  if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
363  if (!frame->width) frame->width = avctx->width;
364  if (!frame->height) frame->height = avctx->height;
365  if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt;
366  }
367  }
368  }
369  emms_c();
370  actual_got_frame = got_frame;
371 
372  if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
373  if (frame->flags & AV_FRAME_FLAG_DISCARD)
374  got_frame = 0;
375  if (got_frame)
377  frame->pts,
378  frame->pkt_dts);
379  } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
380  uint8_t *side;
381  int side_size;
382  uint32_t discard_padding = 0;
383  uint8_t skip_reason = 0;
384  uint8_t discard_reason = 0;
385 
386  if (ret >= 0 && got_frame) {
388  frame->pts,
389  frame->pkt_dts);
390  if (frame->format == AV_SAMPLE_FMT_NONE)
391  frame->format = avctx->sample_fmt;
392  if (!frame->channel_layout)
393  frame->channel_layout = avctx->channel_layout;
394  if (!frame->channels)
395  frame->channels = avctx->channels;
396  if (!frame->sample_rate)
397  frame->sample_rate = avctx->sample_rate;
398  }
399 
401  if(side && side_size>=10) {
402  avci->skip_samples = AV_RL32(side) * avci->skip_samples_multiplier;
403  discard_padding = AV_RL32(side + 4);
404  av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
405  avci->skip_samples, (int)discard_padding);
406  skip_reason = AV_RL8(side + 8);
407  discard_reason = AV_RL8(side + 9);
408  }
409 
410  if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame &&
411  !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
412  avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
413  got_frame = 0;
414  *discarded_samples += frame->nb_samples;
415  }
416 
417  if (avci->skip_samples > 0 && got_frame &&
418  !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
419  if(frame->nb_samples <= avci->skip_samples){
420  got_frame = 0;
421  *discarded_samples += frame->nb_samples;
422  avci->skip_samples -= frame->nb_samples;
423  av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
424  avci->skip_samples);
425  } else {
426  av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples,
427  frame->nb_samples - avci->skip_samples, avctx->channels, frame->format);
428  if(avctx->pkt_timebase.num && avctx->sample_rate) {
429  int64_t diff_ts = av_rescale_q(avci->skip_samples,
430  (AVRational){1, avctx->sample_rate},
431  avctx->pkt_timebase);
432  if(frame->pts!=AV_NOPTS_VALUE)
433  frame->pts += diff_ts;
434 #if FF_API_PKT_PTS
436  if(frame->pkt_pts!=AV_NOPTS_VALUE)
437  frame->pkt_pts += diff_ts;
439 #endif
440  if(frame->pkt_dts!=AV_NOPTS_VALUE)
441  frame->pkt_dts += diff_ts;
442  if (frame->pkt_duration >= diff_ts)
443  frame->pkt_duration -= diff_ts;
444  } else {
445  av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
446  }
447  av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
448  avci->skip_samples, frame->nb_samples);
449  *discarded_samples += avci->skip_samples;
450  frame->nb_samples -= avci->skip_samples;
451  avci->skip_samples = 0;
452  }
453  }
454 
455  if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame &&
456  !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
457  if (discard_padding == frame->nb_samples) {
458  *discarded_samples += frame->nb_samples;
459  got_frame = 0;
460  } else {
461  if(avctx->pkt_timebase.num && avctx->sample_rate) {
462  int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding,
463  (AVRational){1, avctx->sample_rate},
464  avctx->pkt_timebase);
465  frame->pkt_duration = diff_ts;
466  } else {
467  av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n");
468  }
469  av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n",
470  (int)discard_padding, frame->nb_samples);
471  frame->nb_samples -= discard_padding;
472  }
473  }
474 
475  if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) {
477  if (fside) {
478  AV_WL32(fside->data, avci->skip_samples);
479  AV_WL32(fside->data + 4, discard_padding);
480  AV_WL8(fside->data + 8, skip_reason);
481  AV_WL8(fside->data + 9, discard_reason);
482  avci->skip_samples = 0;
483  }
484  }
485  }
486 
487  if (avctx->codec->type == AVMEDIA_TYPE_AUDIO &&
489  ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) {
490  av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n");
491  avci->showed_multi_packet_warning = 1;
492  }
493 
494  if (!got_frame)
495  av_frame_unref(frame);
496 
497  if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED))
498  ret = pkt->size;
499 
500 #if FF_API_AVCTX_TIMEBASE
501  if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
502  avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
503 #endif
504 
505  /* do not stop draining when actual_got_frame != 0 or ret < 0 */
506  /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */
507  if (avci->draining && !actual_got_frame) {
508  if (ret < 0) {
509  /* prevent infinite loop if a decoder wrongly always return error on draining */
510  /* reasonable nb_errors_max = maximum b frames + thread count */
511  int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ?
512  avctx->thread_count : 1);
513 
514  if (avci->nb_draining_errors++ >= nb_errors_max) {
515  av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. "
516  "Stop draining and force EOF.\n");
517  avci->draining_done = 1;
518  ret = AVERROR_BUG;
519  }
520  } else {
521  avci->draining_done = 1;
522  }
523  }
524 
525  avci->compat_decode_consumed += ret;
526 
527  if (ret >= pkt->size || ret < 0) {
528  av_packet_unref(pkt);
530  } else {
531  int consumed = ret;
532 
533  pkt->data += consumed;
534  pkt->size -= consumed;
535  avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment.
536  pkt->pts = AV_NOPTS_VALUE;
537  pkt->dts = AV_NOPTS_VALUE;
540  }
541 
542  if (got_frame)
543  av_assert0(frame->buf[0]);
544 
545  return ret < 0 ? ret : 0;
546 }
547 
549 {
550  int ret;
551  int64_t discarded_samples = 0;
552 
553  while (!frame->buf[0]) {
554  if (discarded_samples > avctx->max_samples)
555  return AVERROR(EAGAIN);
556  ret = decode_simple_internal(avctx, frame, &discarded_samples);
557  if (ret < 0)
558  return ret;
559  }
560 
561  return 0;
562 }
563 
565 {
566  AVCodecInternal *avci = avctx->internal;
567  int ret;
568 
569  av_assert0(!frame->buf[0]);
570 
571  if (avctx->codec->receive_frame) {
572  ret = avctx->codec->receive_frame(avctx, frame);
573  if (ret != AVERROR(EAGAIN))
575  } else
576  ret = decode_simple_receive_frame(avctx, frame);
577 
578  if (ret == AVERROR_EOF)
579  avci->draining_done = 1;
580 
581  if (!ret) {
582  /* the only case where decode data is not set should be decoders
583  * that do not call ff_get_buffer() */
584  av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) ||
585  !(avctx->codec->capabilities & AV_CODEC_CAP_DR1));
586 
587  if (frame->private_ref) {
589 
590  if (fdd->post_process) {
591  ret = fdd->post_process(avctx, frame);
592  if (ret < 0) {
593  av_frame_unref(frame);
594  return ret;
595  }
596  }
597  }
598  }
599 
600  /* free the per-frame decode data */
601  av_buffer_unref(&frame->private_ref);
602 
603  return ret;
604 }
605 
606 int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
607 {
608  AVCodecInternal *avci = avctx->internal;
609  int ret;
610 
611  if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
612  return AVERROR(EINVAL);
613 
614  if (avctx->internal->draining)
615  return AVERROR_EOF;
616 
617  if (avpkt && !avpkt->size && avpkt->data)
618  return AVERROR(EINVAL);
619 
621  if (avpkt && (avpkt->data || avpkt->side_data_elems)) {
622  ret = av_packet_ref(avci->buffer_pkt, avpkt);
623  if (ret < 0)
624  return ret;
625  }
626 
627  ret = av_bsf_send_packet(avci->bsf, avci->buffer_pkt);
628  if (ret < 0) {
630  return ret;
631  }
632 
633  if (!avci->buffer_frame->buf[0]) {
634  ret = decode_receive_frame_internal(avctx, avci->buffer_frame);
635  if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
636  return ret;
637  }
638 
639  return 0;
640 }
641 
643 {
644  /* make sure we are noisy about decoders returning invalid cropping data */
645  if (frame->crop_left >= INT_MAX - frame->crop_right ||
646  frame->crop_top >= INT_MAX - frame->crop_bottom ||
647  (frame->crop_left + frame->crop_right) >= frame->width ||
648  (frame->crop_top + frame->crop_bottom) >= frame->height) {
649  av_log(avctx, AV_LOG_WARNING,
650  "Invalid cropping information set by a decoder: "
652  "(frame size %dx%d). This is a bug, please report it\n",
653  frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom,
654  frame->width, frame->height);
655  frame->crop_left = 0;
656  frame->crop_right = 0;
657  frame->crop_top = 0;
658  frame->crop_bottom = 0;
659  return 0;
660  }
661 
662  if (!avctx->apply_cropping)
663  return 0;
664 
665  return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ?
667 }
668 
669 int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
670 {
671  AVCodecInternal *avci = avctx->internal;
672  int ret, changed;
673 
674  av_frame_unref(frame);
675 
676  if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec))
677  return AVERROR(EINVAL);
678 
679  if (avci->buffer_frame->buf[0]) {
680  av_frame_move_ref(frame, avci->buffer_frame);
681  } else {
682  ret = decode_receive_frame_internal(avctx, frame);
683  if (ret < 0)
684  return ret;
685  }
686 
687  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
688  ret = apply_cropping(avctx, frame);
689  if (ret < 0) {
690  av_frame_unref(frame);
691  return ret;
692  }
693  }
694 
695  avctx->frame_number++;
696 
697  if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
698 
699  if (avctx->frame_number == 1) {
700  avci->initial_format = frame->format;
701  switch(avctx->codec_type) {
702  case AVMEDIA_TYPE_VIDEO:
703  avci->initial_width = frame->width;
704  avci->initial_height = frame->height;
705  break;
706  case AVMEDIA_TYPE_AUDIO:
707  avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate :
708  avctx->sample_rate;
709  avci->initial_channels = frame->channels;
710  avci->initial_channel_layout = frame->channel_layout;
711  break;
712  }
713  }
714 
715  if (avctx->frame_number > 1) {
716  changed = avci->initial_format != frame->format;
717 
718  switch(avctx->codec_type) {
719  case AVMEDIA_TYPE_VIDEO:
720  changed |= avci->initial_width != frame->width ||
721  avci->initial_height != frame->height;
722  break;
723  case AVMEDIA_TYPE_AUDIO:
724  changed |= avci->initial_sample_rate != frame->sample_rate ||
725  avci->initial_sample_rate != avctx->sample_rate ||
726  avci->initial_channels != frame->channels ||
727  avci->initial_channel_layout != frame->channel_layout;
728  break;
729  }
730 
731  if (changed) {
732  avci->changed_frames_dropped++;
733  av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64
734  " drop count: %d \n",
735  avctx->frame_number, frame->pts,
736  avci->changed_frames_dropped);
737  av_frame_unref(frame);
738  return AVERROR_INPUT_CHANGED;
739  }
740  }
741  }
742  return 0;
743 }
744 
746  int *got_frame, const AVPacket *pkt)
747 {
748  AVCodecInternal *avci = avctx->internal;
749  int ret = 0;
750 
752 
753  if (avci->draining_done && pkt && pkt->size != 0) {
754  av_log(avctx, AV_LOG_WARNING, "Got unexpected packet after EOF\n");
755  avcodec_flush_buffers(avctx);
756  }
757 
758  *got_frame = 0;
759 
760  if (avci->compat_decode_partial_size > 0 &&
761  avci->compat_decode_partial_size != pkt->size) {
762  av_log(avctx, AV_LOG_ERROR,
763  "Got unexpected packet size after a partial decode\n");
764  ret = AVERROR(EINVAL);
765  goto finish;
766  }
767 
768  if (!avci->compat_decode_partial_size) {
769  ret = avcodec_send_packet(avctx, pkt);
770  if (ret == AVERROR_EOF)
771  ret = 0;
772  else if (ret == AVERROR(EAGAIN)) {
773  /* we fully drain all the output in each decode call, so this should not
774  * ever happen */
775  ret = AVERROR_BUG;
776  goto finish;
777  } else if (ret < 0)
778  goto finish;
779  }
780 
781  while (ret >= 0) {
782  ret = avcodec_receive_frame(avctx, frame);
783  if (ret < 0) {
784  if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
785  ret = 0;
786  goto finish;
787  }
788 
789  if (frame != avci->compat_decode_frame) {
790  if (!avctx->refcounted_frames) {
791  ret = unrefcount_frame(avci, frame);
792  if (ret < 0)
793  goto finish;
794  }
795 
796  *got_frame = 1;
797  frame = avci->compat_decode_frame;
798  } else {
799  if (!avci->compat_decode_warned) {
800  av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* "
801  "API cannot return all the frames for this decoder. "
802  "Some frames will be dropped. Update your code to the "
803  "new decoding API to fix this.\n");
804  avci->compat_decode_warned = 1;
805  }
806  }
807 
808  if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size))
809  break;
810  }
811 
812 finish:
813  if (ret == 0) {
814  /* if there are any bsfs then assume full packet is always consumed */
815  if (avctx->codec->bsfs)
816  ret = pkt->size;
817  else
818  ret = FFMIN(avci->compat_decode_consumed, pkt->size);
819  }
820  avci->compat_decode_consumed = 0;
821  avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0;
822 
823  return ret;
824 }
825 
826 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
827  int *got_picture_ptr,
828  const AVPacket *avpkt)
829 {
830  return compat_decode(avctx, picture, got_picture_ptr, avpkt);
831 }
832 
833 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
834  AVFrame *frame,
835  int *got_frame_ptr,
836  const AVPacket *avpkt)
837 {
838  return compat_decode(avctx, frame, got_frame_ptr, avpkt);
839 }
840 
842 {
843  memset(sub, 0, sizeof(*sub));
844  sub->pts = AV_NOPTS_VALUE;
845 }
846 
847 #define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
848 static int recode_subtitle(AVCodecContext *avctx,
849  AVPacket *outpkt, const AVPacket *inpkt)
850 {
851 #if CONFIG_ICONV
852  iconv_t cd = (iconv_t)-1;
853  int ret = 0;
854  char *inb, *outb;
855  size_t inl, outl;
856  AVPacket tmp;
857 #endif
858 
859  if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0)
860  return 0;
861 
862 #if CONFIG_ICONV
863  cd = iconv_open("UTF-8", avctx->sub_charenc);
864  av_assert0(cd != (iconv_t)-1);
865 
866  inb = inpkt->data;
867  inl = inpkt->size;
868 
869  if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) {
870  av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
871  ret = AVERROR(ENOMEM);
872  goto end;
873  }
874 
875  ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
876  if (ret < 0)
877  goto end;
878  outpkt->buf = tmp.buf;
879  outpkt->data = tmp.data;
880  outpkt->size = tmp.size;
881  outb = outpkt->data;
882  outl = outpkt->size;
883 
884  if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
885  iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
886  outl >= outpkt->size || inl != 0) {
887  ret = FFMIN(AVERROR(errno), -1);
888  av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
889  "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
890  av_packet_unref(&tmp);
891  goto end;
892  }
893  outpkt->size -= outl;
894  memset(outpkt->data + outpkt->size, 0, outl);
895 
896 end:
897  if (cd != (iconv_t)-1)
898  iconv_close(cd);
899  return ret;
900 #else
901  av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv");
902  return AVERROR(EINVAL);
903 #endif
904 }
905 
906 static int utf8_check(const uint8_t *str)
907 {
908  const uint8_t *byte;
909  uint32_t codepoint, min;
910 
911  while (*str) {
912  byte = str;
913  GET_UTF8(codepoint, *(byte++), return 0;);
914  min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 :
915  1 << (5 * (byte - str) - 4);
916  if (codepoint < min || codepoint >= 0x110000 ||
917  codepoint == 0xFFFE /* BOM */ ||
918  codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */)
919  return 0;
920  str = byte;
921  }
922  return 1;
923 }
924 
925 #if FF_API_ASS_TIMING
926 static void insert_ts(AVBPrint *buf, int ts)
927 {
928  if (ts == -1) {
929  av_bprintf(buf, "9:59:59.99,");
930  } else {
931  int h, m, s;
932 
933  h = ts/360000; ts -= 360000*h;
934  m = ts/ 6000; ts -= 6000*m;
935  s = ts/ 100; ts -= 100*s;
936  av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
937  }
938 }
939 
941 {
942  int i;
943  AVBPrint buf;
944 
946 
947  for (i = 0; i < sub->num_rects; i++) {
948  char *final_dialog;
949  const char *dialog;
950  AVSubtitleRect *rect = sub->rects[i];
951  int ts_start, ts_duration = -1;
952  long int layer;
953 
954  if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10))
955  continue;
956 
957  av_bprint_clear(&buf);
958 
959  /* skip ReadOrder */
960  dialog = strchr(rect->ass, ',');
961  if (!dialog)
962  continue;
963  dialog++;
964 
965  /* extract Layer or Marked */
966  layer = strtol(dialog, (char**)&dialog, 10);
967  if (*dialog != ',')
968  continue;
969  dialog++;
970 
971  /* rescale timing to ASS time base (ms) */
972  ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100));
973  if (pkt->duration != -1)
974  ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100));
975  sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration);
976 
977  /* construct ASS (standalone file form with timestamps) string */
978  av_bprintf(&buf, "Dialogue: %ld,", layer);
979  insert_ts(&buf, ts_start);
980  insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration);
981  av_bprintf(&buf, "%s\r\n", dialog);
982 
983  final_dialog = av_strdup(buf.str);
984  if (!av_bprint_is_complete(&buf) || !final_dialog) {
985  av_freep(&final_dialog);
986  av_bprint_finalize(&buf, NULL);
987  return AVERROR(ENOMEM);
988  }
989  av_freep(&rect->ass);
990  rect->ass = final_dialog;
991  }
992 
993  av_bprint_finalize(&buf, NULL);
994  return 0;
995 }
996 #endif
997 
999  int *got_sub_ptr,
1000  AVPacket *avpkt)
1001 {
1002  int i, ret = 0;
1003 
1004  if (!avpkt->data && avpkt->size) {
1005  av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1006  return AVERROR(EINVAL);
1007  }
1008  if (!avctx->codec)
1009  return AVERROR(EINVAL);
1010  if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
1011  av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
1012  return AVERROR(EINVAL);
1013  }
1014 
1015  *got_sub_ptr = 0;
1016  get_subtitle_defaults(sub);
1017 
1018  if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) {
1019  AVPacket pkt_recoded = *avpkt;
1020 
1021  ret = recode_subtitle(avctx, &pkt_recoded, avpkt);
1022  if (ret < 0) {
1023  *got_sub_ptr = 0;
1024  } else {
1025  ret = extract_packet_props(avctx->internal, &pkt_recoded);
1026  if (ret < 0)
1027  return ret;
1028 
1029  if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE)
1030  sub->pts = av_rescale_q(avpkt->pts,
1031  avctx->pkt_timebase, AV_TIME_BASE_Q);
1032  ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
1033  av_assert1((ret >= 0) >= !!*got_sub_ptr &&
1034  !!*got_sub_ptr >= !!sub->num_rects);
1035 
1036 #if FF_API_ASS_TIMING
1038  && *got_sub_ptr && sub->num_rects) {
1039  const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase
1040  : avctx->time_base;
1041  int err = convert_sub_to_old_ass_form(sub, avpkt, tb);
1042  if (err < 0)
1043  ret = err;
1044  }
1045 #endif
1046 
1047  if (sub->num_rects && !sub->end_display_time && avpkt->duration &&
1048  avctx->pkt_timebase.num) {
1049  AVRational ms = { 1, 1000 };
1050  sub->end_display_time = av_rescale_q(avpkt->duration,
1051  avctx->pkt_timebase, ms);
1052  }
1053 
1055  sub->format = 0;
1056  else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB)
1057  sub->format = 1;
1058 
1059  for (i = 0; i < sub->num_rects; i++) {
1061  sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) {
1062  av_log(avctx, AV_LOG_ERROR,
1063  "Invalid UTF-8 in decoded subtitles text; "
1064  "maybe missing -sub_charenc option\n");
1065  avsubtitle_free(sub);
1066  ret = AVERROR_INVALIDDATA;
1067  break;
1068  }
1069  }
1070 
1071  if (avpkt->data != pkt_recoded.data) { // did we recode?
1072  /* prevent from destroying side data from original packet */
1073  pkt_recoded.side_data = NULL;
1074  pkt_recoded.side_data_elems = 0;
1075 
1076  av_packet_unref(&pkt_recoded);
1077  }
1078  }
1079 
1080  if (*got_sub_ptr)
1081  avctx->frame_number++;
1082  }
1083 
1084  return ret;
1085 }
1086 
1088  const enum AVPixelFormat *fmt)
1089 {
1090  const AVPixFmtDescriptor *desc;
1091  const AVCodecHWConfig *config;
1092  int i, n;
1093 
1094  // If a device was supplied when the codec was opened, assume that the
1095  // user wants to use it.
1096  if (avctx->hw_device_ctx && avctx->codec->hw_configs) {
1097  AVHWDeviceContext *device_ctx =
1099  for (i = 0;; i++) {
1100  config = &avctx->codec->hw_configs[i]->public;
1101  if (!config)
1102  break;
1103  if (!(config->methods &
1105  continue;
1106  if (device_ctx->type != config->device_type)
1107  continue;
1108  for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1109  if (config->pix_fmt == fmt[n])
1110  return fmt[n];
1111  }
1112  }
1113  }
1114  // No device or other setup, so we have to choose from things which
1115  // don't any other external information.
1116 
1117  // If the last element of the list is a software format, choose it
1118  // (this should be best software format if any exist).
1119  for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1120  desc = av_pix_fmt_desc_get(fmt[n - 1]);
1121  if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
1122  return fmt[n - 1];
1123 
1124  // Finally, traverse the list in order and choose the first entry
1125  // with no external dependencies (if there is no hardware configuration
1126  // information available then this just picks the first entry).
1127  for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) {
1128  for (i = 0;; i++) {
1129  config = avcodec_get_hw_config(avctx->codec, i);
1130  if (!config)
1131  break;
1132  if (config->pix_fmt == fmt[n])
1133  break;
1134  }
1135  if (!config) {
1136  // No specific config available, so the decoder must be able
1137  // to handle this format without any additional setup.
1138  return fmt[n];
1139  }
1141  // Usable with only internal setup.
1142  return fmt[n];
1143  }
1144  }
1145 
1146  // Nothing is usable, give up.
1147  return AV_PIX_FMT_NONE;
1148 }
1149 
1151  enum AVHWDeviceType dev_type)
1152 {
1153  AVHWDeviceContext *device_ctx;
1154  AVHWFramesContext *frames_ctx;
1155  int ret;
1156 
1157  if (!avctx->hwaccel)
1158  return AVERROR(ENOSYS);
1159 
1160  if (avctx->hw_frames_ctx)
1161  return 0;
1162  if (!avctx->hw_device_ctx) {
1163  av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is "
1164  "required for hardware accelerated decoding.\n");
1165  return AVERROR(EINVAL);
1166  }
1167 
1168  device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data;
1169  if (device_ctx->type != dev_type) {
1170  av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware "
1171  "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type),
1172  av_hwdevice_get_type_name(device_ctx->type));
1173  return AVERROR(EINVAL);
1174  }
1175 
1177  avctx->hw_device_ctx,
1178  avctx->hwaccel->pix_fmt,
1179  &avctx->hw_frames_ctx);
1180  if (ret < 0)
1181  return ret;
1182 
1183  frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
1184 
1185 
1186  if (frames_ctx->initial_pool_size) {
1187  // We guarantee 4 base work surfaces. The function above guarantees 1
1188  // (the absolute minimum), so add the missing count.
1189  frames_ctx->initial_pool_size += 3;
1190  }
1191 
1192  ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
1193  if (ret < 0) {
1194  av_buffer_unref(&avctx->hw_frames_ctx);
1195  return ret;
1196  }
1197 
1198  return 0;
1199 }
1200 
1202  AVBufferRef *device_ref,
1204  AVBufferRef **out_frames_ref)
1205 {
1206  AVBufferRef *frames_ref = NULL;
1207  const AVCodecHWConfigInternal *hw_config;
1208  const AVHWAccel *hwa;
1209  int i, ret;
1210 
1211  for (i = 0;; i++) {
1212  hw_config = avctx->codec->hw_configs[i];
1213  if (!hw_config)
1214  return AVERROR(ENOENT);
1215  if (hw_config->public.pix_fmt == hw_pix_fmt)
1216  break;
1217  }
1218 
1219  hwa = hw_config->hwaccel;
1220  if (!hwa || !hwa->frame_params)
1221  return AVERROR(ENOENT);
1222 
1223  frames_ref = av_hwframe_ctx_alloc(device_ref);
1224  if (!frames_ref)
1225  return AVERROR(ENOMEM);
1226 
1227  ret = hwa->frame_params(avctx, frames_ref);
1228  if (ret >= 0) {
1229  AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data;
1230 
1231  if (frames_ctx->initial_pool_size) {
1232  // If the user has requested that extra output surfaces be
1233  // available then add them here.
1234  if (avctx->extra_hw_frames > 0)
1235  frames_ctx->initial_pool_size += avctx->extra_hw_frames;
1236 
1237  // If frame threading is enabled then an extra surface per thread
1238  // is also required.
1239  if (avctx->active_thread_type & FF_THREAD_FRAME)
1240  frames_ctx->initial_pool_size += avctx->thread_count;
1241  }
1242 
1243  *out_frames_ref = frames_ref;
1244  } else {
1245  av_buffer_unref(&frames_ref);
1246  }
1247  return ret;
1248 }
1249 
1250 static int hwaccel_init(AVCodecContext *avctx,
1251  const AVCodecHWConfigInternal *hw_config)
1252 {
1253  const AVHWAccel *hwaccel;
1254  int err;
1255 
1256  hwaccel = hw_config->hwaccel;
1259  av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n",
1260  hwaccel->name);
1261  return AVERROR_PATCHWELCOME;
1262  }
1263 
1264  if (hwaccel->priv_data_size) {
1265  avctx->internal->hwaccel_priv_data =
1266  av_mallocz(hwaccel->priv_data_size);
1267  if (!avctx->internal->hwaccel_priv_data)
1268  return AVERROR(ENOMEM);
1269  }
1270 
1271  avctx->hwaccel = hwaccel;
1272  if (hwaccel->init) {
1273  err = hwaccel->init(avctx);
1274  if (err < 0) {
1275  av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: "
1276  "hwaccel initialisation returned error.\n",
1277  av_get_pix_fmt_name(hw_config->public.pix_fmt));
1279  avctx->hwaccel = NULL;
1280  return err;
1281  }
1282  }
1283 
1284  return 0;
1285 }
1286 
1287 static void hwaccel_uninit(AVCodecContext *avctx)
1288 {
1289  if (avctx->hwaccel && avctx->hwaccel->uninit)
1290  avctx->hwaccel->uninit(avctx);
1291 
1293 
1294  avctx->hwaccel = NULL;
1295 
1296  av_buffer_unref(&avctx->hw_frames_ctx);
1297 }
1298 
1299 int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
1300 {
1301  const AVPixFmtDescriptor *desc;
1302  enum AVPixelFormat *choices;
1303  enum AVPixelFormat ret, user_choice;
1304  const AVCodecHWConfigInternal *hw_config;
1305  const AVCodecHWConfig *config;
1306  int i, n, err;
1307 
1308  // Find end of list.
1309  for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++);
1310  // Must contain at least one entry.
1311  av_assert0(n >= 1);
1312  // If a software format is available, it must be the last entry.
1313  desc = av_pix_fmt_desc_get(fmt[n - 1]);
1314  if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) {
1315  // No software format is available.
1316  } else {
1317  avctx->sw_pix_fmt = fmt[n - 1];
1318  }
1319 
1320  choices = av_malloc_array(n + 1, sizeof(*choices));
1321  if (!choices)
1322  return AV_PIX_FMT_NONE;
1323 
1324  memcpy(choices, fmt, (n + 1) * sizeof(*choices));
1325 
1326  for (;;) {
1327  // Remove the previous hwaccel, if there was one.
1328  hwaccel_uninit(avctx);
1329 
1330  user_choice = avctx->get_format(avctx, choices);
1331  if (user_choice == AV_PIX_FMT_NONE) {
1332  // Explicitly chose nothing, give up.
1333  ret = AV_PIX_FMT_NONE;
1334  break;
1335  }
1336 
1337  desc = av_pix_fmt_desc_get(user_choice);
1338  if (!desc) {
1339  av_log(avctx, AV_LOG_ERROR, "Invalid format returned by "
1340  "get_format() callback.\n");
1341  ret = AV_PIX_FMT_NONE;
1342  break;
1343  }
1344  av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n",
1345  desc->name);
1346 
1347  for (i = 0; i < n; i++) {
1348  if (choices[i] == user_choice)
1349  break;
1350  }
1351  if (i == n) {
1352  av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): "
1353  "%s not in possible list.\n", desc->name);
1354  ret = AV_PIX_FMT_NONE;
1355  break;
1356  }
1357 
1358  if (avctx->codec->hw_configs) {
1359  for (i = 0;; i++) {
1360  hw_config = avctx->codec->hw_configs[i];
1361  if (!hw_config)
1362  break;
1363  if (hw_config->public.pix_fmt == user_choice)
1364  break;
1365  }
1366  } else {
1367  hw_config = NULL;
1368  }
1369 
1370  if (!hw_config) {
1371  // No config available, so no extra setup required.
1372  ret = user_choice;
1373  break;
1374  }
1375  config = &hw_config->public;
1376 
1377  if (config->methods &
1379  avctx->hw_frames_ctx) {
1380  const AVHWFramesContext *frames_ctx =
1382  if (frames_ctx->format != user_choice) {
1383  av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1384  "does not match the format of the provided frames "
1385  "context.\n", desc->name);
1386  goto try_again;
1387  }
1388  } else if (config->methods &
1390  avctx->hw_device_ctx) {
1391  const AVHWDeviceContext *device_ctx =
1393  if (device_ctx->type != config->device_type) {
1394  av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1395  "does not match the type of the provided device "
1396  "context.\n", desc->name);
1397  goto try_again;
1398  }
1399  } else if (config->methods &
1401  // Internal-only setup, no additional configuration.
1402  } else if (config->methods &
1404  // Some ad-hoc configuration we can't see and can't check.
1405  } else {
1406  av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: "
1407  "missing configuration.\n", desc->name);
1408  goto try_again;
1409  }
1410  if (hw_config->hwaccel) {
1411  av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel "
1412  "initialisation.\n", desc->name);
1413  err = hwaccel_init(avctx, hw_config);
1414  if (err < 0)
1415  goto try_again;
1416  }
1417  ret = user_choice;
1418  break;
1419 
1420  try_again:
1421  av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying "
1422  "get_format() without it.\n", desc->name);
1423  for (i = 0; i < n; i++) {
1424  if (choices[i] == user_choice)
1425  break;
1426  }
1427  for (; i + 1 < n; i++)
1428  choices[i] = choices[i + 1];
1429  --n;
1430  }
1431 
1432  av_freep(&choices);
1433  return ret;
1434 }
1435 
1436 static void frame_pool_free(void *opaque, uint8_t *data)
1437 {
1438  FramePool *pool = (FramePool*)data;
1439  int i;
1440 
1441  for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
1442  av_buffer_pool_uninit(&pool->pools[i]);
1443 
1444  av_freep(&data);
1445 }
1446 
1448 {
1449  FramePool *pool = av_mallocz(sizeof(*pool));
1450  AVBufferRef *buf;
1451 
1452  if (!pool)
1453  return NULL;
1454 
1455  buf = av_buffer_create((uint8_t*)pool, sizeof(*pool),
1456  frame_pool_free, NULL, 0);
1457  if (!buf) {
1458  av_freep(&pool);
1459  return NULL;
1460  }
1461 
1462  return buf;
1463 }
1464 
1466 {
1467  FramePool *pool = avctx->internal->pool ?
1468  (FramePool*)avctx->internal->pool->data : NULL;
1469  AVBufferRef *pool_buf;
1470  int i, ret, ch, planes;
1471 
1472  if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
1473  int planar = av_sample_fmt_is_planar(frame->format);
1474  ch = frame->channels;
1475  planes = planar ? ch : 1;
1476  }
1477 
1478  if (pool && pool->format == frame->format) {
1479  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
1480  pool->width == frame->width && pool->height == frame->height)
1481  return 0;
1482  if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && pool->planes == planes &&
1483  pool->channels == ch && frame->nb_samples == pool->samples)
1484  return 0;
1485  }
1486 
1487  pool_buf = frame_pool_alloc();
1488  if (!pool_buf)
1489  return AVERROR(ENOMEM);
1490  pool = (FramePool*)pool_buf->data;
1491 
1492  switch (avctx->codec_type) {
1493  case AVMEDIA_TYPE_VIDEO: {
1494  int linesize[4];
1495  int w = frame->width;
1496  int h = frame->height;
1497  int unaligned;
1498  ptrdiff_t linesize1[4];
1499  size_t size[4];
1500 
1501  avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
1502 
1503  do {
1504  // NOTE: do not align linesizes individually, this breaks e.g. assumptions
1505  // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
1506  ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w);
1507  if (ret < 0)
1508  goto fail;
1509  // increase alignment of w for next try (rhs gives the lowest bit set in w)
1510  w += w & ~(w - 1);
1511 
1512  unaligned = 0;
1513  for (i = 0; i < 4; i++)
1514  unaligned |= linesize[i] % pool->stride_align[i];
1515  } while (unaligned);
1516 
1517  for (i = 0; i < 4; i++)
1518  linesize1[i] = linesize[i];
1519  ret = av_image_fill_plane_sizes(size, avctx->pix_fmt, h, linesize1);
1520  if (ret < 0)
1521  goto fail;
1522 
1523  for (i = 0; i < 4; i++) {
1524  pool->linesize[i] = linesize[i];
1525  if (size[i]) {
1526  if (size[i] > INT_MAX - (16 + STRIDE_ALIGN - 1)) {
1527  ret = AVERROR(EINVAL);
1528  goto fail;
1529  }
1530  pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1,
1531  CONFIG_MEMORY_POISONING ?
1532  NULL :
1534  if (!pool->pools[i]) {
1535  ret = AVERROR(ENOMEM);
1536  goto fail;
1537  }
1538  }
1539  }
1540  pool->format = frame->format;
1541  pool->width = frame->width;
1542  pool->height = frame->height;
1543 
1544  break;
1545  }
1546  case AVMEDIA_TYPE_AUDIO: {
1547  ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
1548  frame->nb_samples, frame->format, 0);
1549  if (ret < 0)
1550  goto fail;
1551 
1552  pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
1553  if (!pool->pools[0]) {
1554  ret = AVERROR(ENOMEM);
1555  goto fail;
1556  }
1557 
1558  pool->format = frame->format;
1559  pool->planes = planes;
1560  pool->channels = ch;
1561  pool->samples = frame->nb_samples;
1562  break;
1563  }
1564  default: av_assert0(0);
1565  }
1566 
1567  av_buffer_unref(&avctx->internal->pool);
1568  avctx->internal->pool = pool_buf;
1569 
1570  return 0;
1571 fail:
1572  av_buffer_unref(&pool_buf);
1573  return ret;
1574 }
1575 
1577 {
1578  FramePool *pool = (FramePool*)avctx->internal->pool->data;
1579  int planes = pool->planes;
1580  int i;
1581 
1582  frame->linesize[0] = pool->linesize[0];
1583 
1585  frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data));
1588  sizeof(*frame->extended_buf));
1589  if (!frame->extended_data || !frame->extended_buf) {
1590  av_freep(&frame->extended_data);
1591  av_freep(&frame->extended_buf);
1592  return AVERROR(ENOMEM);
1593  }
1594  } else {
1595  frame->extended_data = frame->data;
1596  av_assert0(frame->nb_extended_buf == 0);
1597  }
1598 
1599  for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
1600  frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
1601  if (!frame->buf[i])
1602  goto fail;
1603  frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
1604  }
1605  for (i = 0; i < frame->nb_extended_buf; i++) {
1606  frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
1607  if (!frame->extended_buf[i])
1608  goto fail;
1609  frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
1610  }
1611 
1612  if (avctx->debug & FF_DEBUG_BUFFERS)
1613  av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
1614 
1615  return 0;
1616 fail:
1617  av_frame_unref(frame);
1618  return AVERROR(ENOMEM);
1619 }
1620 
1622 {
1623  FramePool *pool = (FramePool*)s->internal->pool->data;
1625  int i;
1626 
1627  if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) {
1628  av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n");
1629  return -1;
1630  }
1631 
1632  if (!desc) {
1633  av_log(s, AV_LOG_ERROR,
1634  "Unable to get pixel format descriptor for format %s\n",
1635  av_get_pix_fmt_name(pic->format));
1636  return AVERROR(EINVAL);
1637  }
1638 
1639  memset(pic->data, 0, sizeof(pic->data));
1640  pic->extended_data = pic->data;
1641 
1642  for (i = 0; i < 4 && pool->pools[i]; i++) {
1643  pic->linesize[i] = pool->linesize[i];
1644 
1645  pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
1646  if (!pic->buf[i])
1647  goto fail;
1648 
1649  pic->data[i] = pic->buf[i]->data;
1650  }
1651  for (; i < AV_NUM_DATA_POINTERS; i++) {
1652  pic->data[i] = NULL;
1653  pic->linesize[i] = 0;
1654  }
1655  if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
1656  ((desc->flags & FF_PSEUDOPAL) && pic->data[1]))
1657  avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format);
1658 
1659  if (s->debug & FF_DEBUG_BUFFERS)
1660  av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
1661 
1662  return 0;
1663 fail:
1664  av_frame_unref(pic);
1665  return AVERROR(ENOMEM);
1666 }
1667 
1669 {
1670  int ret;
1671 
1672  if (avctx->hw_frames_ctx) {
1673  ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0);
1674  frame->width = avctx->coded_width;
1675  frame->height = avctx->coded_height;
1676  return ret;
1677  }
1678 
1679  if ((ret = update_frame_pool(avctx, frame)) < 0)
1680  return ret;
1681 
1682  switch (avctx->codec_type) {
1683  case AVMEDIA_TYPE_VIDEO:
1684  return video_get_buffer(avctx, frame);
1685  case AVMEDIA_TYPE_AUDIO:
1686  return audio_get_buffer(avctx, frame);
1687  default:
1688  return -1;
1689  }
1690 }
1691 
1693 {
1694  int size;
1695  const uint8_t *side_metadata;
1696 
1697  AVDictionary **frame_md = &frame->metadata;
1698 
1699  side_metadata = av_packet_get_side_data(avpkt,
1701  return av_packet_unpack_dictionary(side_metadata, size, frame_md);
1702 }
1703 
1705 {
1706  AVPacket *pkt = avctx->internal->last_pkt_props;
1707  int i;
1708  static const struct {
1709  enum AVPacketSideDataType packet;
1711  } sd[] = {
1722  };
1723 
1724  if (IS_EMPTY(pkt))
1726  &avctx->internal->pkt_props_tail,
1727  pkt);
1728 
1729  if (pkt) {
1730  frame->pts = pkt->pts;
1731 #if FF_API_PKT_PTS
1733  frame->pkt_pts = pkt->pts;
1735 #endif
1736  frame->pkt_pos = pkt->pos;
1737  frame->pkt_duration = pkt->duration;
1738  frame->pkt_size = pkt->size;
1739 
1740  for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
1741  int size;
1742  uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size);
1743  if (packet_sd) {
1744  AVFrameSideData *frame_sd = av_frame_new_side_data(frame,
1745  sd[i].frame,
1746  size);
1747  if (!frame_sd)
1748  return AVERROR(ENOMEM);
1749 
1750  memcpy(frame_sd->data, packet_sd, size);
1751  }
1752  }
1753  add_metadata_from_side_data(pkt, frame);
1754 
1755  if (pkt->flags & AV_PKT_FLAG_DISCARD) {
1756  frame->flags |= AV_FRAME_FLAG_DISCARD;
1757  } else {
1758  frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD);
1759  }
1760  }
1761  frame->reordered_opaque = avctx->reordered_opaque;
1762 
1763  if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
1764  frame->color_primaries = avctx->color_primaries;
1765  if (frame->color_trc == AVCOL_TRC_UNSPECIFIED)
1766  frame->color_trc = avctx->color_trc;
1767  if (frame->colorspace == AVCOL_SPC_UNSPECIFIED)
1768  frame->colorspace = avctx->colorspace;
1769  if (frame->color_range == AVCOL_RANGE_UNSPECIFIED)
1770  frame->color_range = avctx->color_range;
1772  frame->chroma_location = avctx->chroma_sample_location;
1773 
1774  switch (avctx->codec->type) {
1775  case AVMEDIA_TYPE_VIDEO:
1776  frame->format = avctx->pix_fmt;
1777  if (!frame->sample_aspect_ratio.num)
1778  frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
1779 
1780  if (frame->width && frame->height &&
1781  av_image_check_sar(frame->width, frame->height,
1782  frame->sample_aspect_ratio) < 0) {
1783  av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
1784  frame->sample_aspect_ratio.num,
1785  frame->sample_aspect_ratio.den);
1786  frame->sample_aspect_ratio = (AVRational){ 0, 1 };
1787  }
1788 
1789  break;
1790  case AVMEDIA_TYPE_AUDIO:
1791  if (!frame->sample_rate)
1792  frame->sample_rate = avctx->sample_rate;
1793  if (frame->format < 0)
1794  frame->format = avctx->sample_fmt;
1795  if (!frame->channel_layout) {
1796  if (avctx->channel_layout) {
1798  avctx->channels) {
1799  av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
1800  "configuration.\n");
1801  return AVERROR(EINVAL);
1802  }
1803 
1804  frame->channel_layout = avctx->channel_layout;
1805  } else {
1806  if (avctx->channels > FF_SANE_NB_CHANNELS) {
1807  av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
1808  avctx->channels);
1809  return AVERROR(ENOSYS);
1810  }
1811  }
1812  }
1813  frame->channels = avctx->channels;
1814  break;
1815  }
1816  return 0;
1817 }
1818 
1820 {
1821  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1822  int i;
1823  int num_planes = av_pix_fmt_count_planes(frame->format);
1825  int flags = desc ? desc->flags : 0;
1826  if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL))
1827  num_planes = 2;
1828  if ((flags & FF_PSEUDOPAL) && frame->data[1])
1829  num_planes = 2;
1830  for (i = 0; i < num_planes; i++) {
1831  av_assert0(frame->data[i]);
1832  }
1833  // For formats without data like hwaccel allow unused pointers to be non-NULL.
1834  for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) {
1835  if (frame->data[i])
1836  av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n");
1837  frame->data[i] = NULL;
1838  }
1839  }
1840 }
1841 
1842 static void decode_data_free(void *opaque, uint8_t *data)
1843 {
1844  FrameDecodeData *fdd = (FrameDecodeData*)data;
1845 
1846  if (fdd->post_process_opaque_free)
1848 
1849  if (fdd->hwaccel_priv_free)
1850  fdd->hwaccel_priv_free(fdd->hwaccel_priv);
1851 
1852  av_freep(&fdd);
1853 }
1854 
1856 {
1857  AVBufferRef *fdd_buf;
1858  FrameDecodeData *fdd;
1859 
1860  av_assert1(!frame->private_ref);
1861  av_buffer_unref(&frame->private_ref);
1862 
1863  fdd = av_mallocz(sizeof(*fdd));
1864  if (!fdd)
1865  return AVERROR(ENOMEM);
1866 
1867  fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free,
1869  if (!fdd_buf) {
1870  av_freep(&fdd);
1871  return AVERROR(ENOMEM);
1872  }
1873 
1874  frame->private_ref = fdd_buf;
1875 
1876  return 0;
1877 }
1878 
1880 {
1881  const AVHWAccel *hwaccel = avctx->hwaccel;
1882  int override_dimensions = 1;
1883  int ret;
1884 
1885  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
1886  if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN ||
1887  (ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) {
1888  av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
1889  ret = AVERROR(EINVAL);
1890  goto fail;
1891  }
1892 
1893  if (frame->width <= 0 || frame->height <= 0) {
1894  frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres));
1895  frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));
1896  override_dimensions = 0;
1897  }
1898 
1899  if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) {
1900  av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n");
1901  ret = AVERROR(EINVAL);
1902  goto fail;
1903  }
1904  } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
1905  if (frame->nb_samples * (int64_t)avctx->channels > avctx->max_samples) {
1906  av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples);
1907  ret = AVERROR(EINVAL);
1908  goto fail;
1909  }
1910  }
1911  ret = ff_decode_frame_props(avctx, frame);
1912  if (ret < 0)
1913  goto fail;
1914 
1915  if (hwaccel) {
1916  if (hwaccel->alloc_frame) {
1917  ret = hwaccel->alloc_frame(avctx, frame);
1918  goto end;
1919  }
1920  } else
1921  avctx->sw_pix_fmt = avctx->pix_fmt;
1922 
1923  ret = avctx->get_buffer2(avctx, frame, flags);
1924  if (ret < 0)
1925  goto fail;
1926 
1927  validate_avframe_allocation(avctx, frame);
1928 
1929  ret = ff_attach_decode_data(frame);
1930  if (ret < 0)
1931  goto fail;
1932 
1933 end:
1934  if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
1936  frame->width = avctx->width;
1937  frame->height = avctx->height;
1938  }
1939 
1940 fail:
1941  if (ret < 0) {
1942  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1943  av_frame_unref(frame);
1944  }
1945 
1946  return ret;
1947 }
1948 
1950 {
1951  AVFrame *tmp;
1952  int ret;
1953 
1955 
1956  if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
1957  av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
1958  frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
1959  av_frame_unref(frame);
1960  }
1961 
1962  if (!frame->data[0])
1963  return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1964 
1965  if ((flags & FF_REGET_BUFFER_FLAG_READONLY) || av_frame_is_writable(frame))
1966  return ff_decode_frame_props(avctx, frame);
1967 
1968  tmp = av_frame_alloc();
1969  if (!tmp)
1970  return AVERROR(ENOMEM);
1971 
1972  av_frame_move_ref(tmp, frame);
1973 
1974  ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
1975  if (ret < 0) {
1976  av_frame_free(&tmp);
1977  return ret;
1978  }
1979 
1980  av_frame_copy(frame, tmp);
1981  av_frame_free(&tmp);
1982 
1983  return 0;
1984 }
1985 
1987 {
1988  int ret = reget_buffer_internal(avctx, frame, flags);
1989  if (ret < 0)
1990  av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
1991  return ret;
1992 }
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
#define FF_SANE_NB_CHANNELS
Definition: internal.h:97
This struct aggregates all the (hardware/vendor-specific) "high-level" state, i.e.
Definition: hwcontext.h:61
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1594
enum AVPixelFormat(* get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
callback to negotiate the pixelFormat
Definition: avcodec.h:778
AVCodecHWConfig public
This is the structure which will be returned to the user by avcodec_get_hw_config().
Definition: hwconfig.h:34
int nb_draining_errors
Definition: internal.h:197
#define FF_SUB_CHARENC_MODE_PRE_DECODER
the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv ...
Definition: avcodec.h:2127
#define NULL
Definition: coverity.c:32
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
Definition: decode.c:1299
const struct AVCodec * codec
Definition: avcodec.h:535
AVRational framerate
Definition: avcodec.h:2069
const AVCodecDescriptor * codec_descriptor
AVCodecDescriptor.
Definition: avcodec.h:2090
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_NUM_DATA_POINTERS
Definition: frame.h:309
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
AVPacketSideDataType
Definition: packet.h:40
int64_t pts_correction_num_faulty_dts
Number of incorrect PTS values so far.
Definition: avcodec.h:2107
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
#define GET_UTF8(val, GET_BYTE, ERROR)
Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
Definition: common.h:426
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
int stride_align[AV_NUM_DATA_POINTERS]
Definition: decode.c:61
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
This side data must be associated with an audio frame and corresponds to enum AVAudioServiceType defi...
Definition: frame.h:113
int apply_cropping
Video decoding only.
Definition: avcodec.h:2314
static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:564
const struct AVCodecHWConfigInternal ** hw_configs
Array of pointers to hardware configurations supported by the codec, or NULL if no hardware supported...
Definition: codec.h:323
#define AV_CODEC_FLAG2_SKIP_MANUAL
Do not skip samples and export skip information as frame side data.
Definition: avcodec.h:384
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:714
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:579
int capabilities
Hardware accelerated codec capabilities.
Definition: avcodec.h:2443
AVPacket * last_pkt_props
Properties (timestamps+side data) extracted from the last packet passed for decoding.
Definition: internal.h:147
const char * desc
Definition: libsvtav1.c:79
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb)
Definition: decode.c:940
int changed_frames_dropped
Definition: internal.h:200
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
AVFrame * to_free
Definition: internal.h:134
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:383
static void get_subtitle_defaults(AVSubtitle *sub)
Definition: decode.c:841
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:106
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1<< 16)) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0f/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(UINT64_C(1)<< 63)))#define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};static void cpy1(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, len);}static void cpy2(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 2 *len);}static void cpy4(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 4 *len);}static void cpy8(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;}void swri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len){int ch;int off=0;const int os=(out->planar?1:out->ch_count)*out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){int planes=in->planar?in->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){int planes=out->planar?out->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){int planes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out->ch+ch,(const uint8_t **) in->ch+ch, off *(out-> planar
Definition: audioconvert.c:56
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:499
static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:548
int width
Definition: decode.c:60
int(* receive_frame)(struct AVCodecContext *avctx, struct AVFrame *frame)
Decode API with decoupled packet/frame dataflow.
Definition: codec.h:298
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition: packet.h:114
ATSC A53 Part 4 Closed Captions.
Definition: packet.h:242
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:1161
int nb_extended_buf
Number of elements in extended_buf.
Definition: frame.h:517
int ff_decode_bsfs_init(AVCodecContext *avctx)
Called during avcodec_open2() to initialize avctx->internal->bsf.
Definition: decode.c:214
Content light level (based on CTA-861.3).
Definition: frame.h:136
int num
Numerator.
Definition: rational.h:59
Timecode which conforms to SMPTE ST 12-1.
Definition: frame.h:168
int size
Definition: packet.h:364
int av_codec_is_decoder(const AVCodec *codec)
Definition: utils.c:101
int initial_channels
Definition: internal.h:204
enum AVPixelFormat pix_fmt
Supported pixel format.
Definition: avcodec.h:2437
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:905
void(* hwaccel_priv_free)(void *priv)
Definition: decode.h:53
#define AV_CODEC_PROP_TEXT_SUB
Subtitle codec is text based.
Definition: codec_desc.h:102
static void frame_pool_free(void *opaque, uint8_t *data)
Definition: decode.c:1436
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
int samples
Definition: decode.c:65
int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt->size from avpkt->data into frame.
Definition: decode.c:833
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
Definition: hwcontext.h:209
Mastering display metadata associated with a video frame.
Definition: frame.h:119
unsigned num_rects
Definition: avcodec.h:2698
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:595
enum AVMediaType type
Definition: codec.h:203
static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
Definition: decode.c:68
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static int recode_subtitle(AVCodecContext *avctx, AVPacket *outpkt, const AVPacket *inpkt)
Definition: decode.c:848
AVBufferPool * pools[4]
Pools for each data plane.
Definition: decode.c:54
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
Definition: decode.c:1704
size_t crop_bottom
Definition: frame.h:669
static AVPacket pkt
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
Definition: decode.c:998
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1690
int(* alloc_frame)(AVCodecContext *avctx, AVFrame *frame)
Allocate a custom buffer.
Definition: avcodec.h:2456
static int utf8_check(const uint8_t *str)
Definition: decode.c:906
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
static int apply_cropping(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:642
The codec supports this format by some internal method.
Definition: codec.h:411
Mastering display metadata (based on SMPTE-2086:2014).
Definition: packet.h:222
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:649
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
AVSubtitleRect ** rects
Definition: avcodec.h:2699
int(* uninit)(AVCodecContext *avctx)
Uninitialize the hwaccel private data.
Definition: avcodec.h:2548
static AVBufferRef * frame_pool_alloc(void)
Definition: decode.c:1447
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:75
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int height
Definition: decode.c:60
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Definition: decode.c:1087
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1194
uint8_t
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
int ff_attach_decode_data(AVFrame *frame)
Definition: decode.c:1855
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
Unpack a dictionary from side_data.
Definition: avpacket.c:530
AVOptions.
static int64_t guess_correct_pts(AVCodecContext *ctx, int64_t reordered_pts, int64_t dts)
Attempt to guess proper monotonic timestamps for decoded video frames which might have incorrect time...
Definition: decode.c:289
size_t crop_left
Definition: frame.h:670
AVPacket pkt
Definition: packet.h:397
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:176
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:381
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: packet.h:108
#define AV_CODEC_FLAG_UNALIGNED
Allow decoders to produce frames with data planes that are not aligned to CPU requirements (e...
Definition: avcodec.h:271
#define AV_WL8(p, d)
Definition: intreadwrite.h:399
Multithreading support functions.
AVBufferRef * private_ref
AVBufferRef for internal use by a single libav* library.
Definition: frame.h:687
int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
Called by decoders to get the next packet for decoding.
Definition: decode.c:248
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:401
enum AVPixelFormat pix_fmt
For decoders, a hardware pixel format which that decoder may be able to decode to if suitable hardwar...
Definition: codec.h:432
int planes
Definition: decode.c:63
Structure to hold side data for an AVFrame.
Definition: frame.h:214
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:322
size_t compat_decode_consumed
Definition: internal.h:185
static void finish(void)
Definition: movenc.c:345
uint8_t * data
Definition: packet.h:363
#define FF_REGET_BUFFER_FLAG_READONLY
the returned buffer does not need to be writable
Definition: internal.h:298
#define AVERROR_EOF
End of file.
Definition: error.h:55
AVDictionary * metadata
metadata.
Definition: frame.h:594
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:1765
#define AV_BUFFER_FLAG_READONLY
Always treat the buffer as read-only, even when it has only one reference.
Definition: buffer.h:113
int(* init)(AVCodecContext *avctx)
Initialize the hwaccel private data.
Definition: avcodec.h:2540
ptrdiff_t size
Definition: opengl_enc.c:100
int initial_height
Definition: internal.h:202
int initial_format
Definition: internal.h:201
The codec supports this format by some ad-hoc method.
Definition: codec.h:420
The data represents the AVSphericalMapping structure defined in libavutil/spherical.h.
Definition: frame.h:130
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:1168
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
The buffer pool.
const char * name
Definition: pixdesc.h:82
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:615
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
Definition: utils.c:156
int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt)
Submit a new frame to a decoding thread.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define AV_RL8(x)
Definition: intreadwrite.h:398
AVPacketList * pkt_props_tail
Definition: internal.h:149
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:2083
AVBSFContext * bsf
Definition: internal.h:141
int width
Definition: frame.h:366
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:816
void * post_process_opaque
Definition: decode.h:46
#define AV_BPRINT_SIZE_UNLIMITED
static int hwaccel_init(AVCodecContext *avctx, const AVCodecHWConfigInternal *hw_config)
Definition: decode.c:1250
static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:1819
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: packet.h:72
int av_frame_apply_cropping(AVFrame *frame, int flags)
Crop the given video AVFrame according to its crop_left/crop_top/crop_right/ crop_bottom fields...
Definition: frame.c:903
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:353
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
ICC profile data consisting of an opaque octet buffer following the format described by ISO 15076-1...
Definition: packet.h:274
int64_t pts_correction_last_pts
Number of incorrect DTS values so far.
Definition: avcodec.h:2108
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available...
Definition: decode.c:1986
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1804
int methods
Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible setup methods which can be used...
Definition: codec.h:437
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1947
int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
Definition: decode.c:669
AVFrame * buffer_frame
Definition: internal.h:180
int capabilities
Codec capabilities.
Definition: codec.h:209
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:552
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:346
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:563
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: bsf.h:89
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
simple assert() macros that are a bit more flexible than ISO C assert().
int side_data_elems
Definition: packet.h:375
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
int64_t max_pixels
The number of pixels per image to maximally accept.
Definition: avcodec.h:2256
int av_hwframe_ctx_init(AVBufferRef *ref)
Finalize the context before use.
Definition: hwcontext.c:333
enum AVHWDeviceType type
This field identifies the underlying API used for hardware access.
Definition: hwcontext.h:79
#define FFMAX(a, b)
Definition: common.h:94
int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
Allocate a new frame attached to the given AVHWFramesContext.
Definition: hwcontext.c:502
#define fail()
Definition: checkasm.h:123
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
Definition: frame.c:812
const AVHWAccel * hwaccel
If this configuration uses a hwaccel, a pointer to it.
Definition: hwconfig.h:39
#define FF_CODEC_CAP_EXPORTS_CROPPING
The decoder sets the cropping fields in the output frames manually.
Definition: internal.h:66
int priv_data_size
Size of the private data to allocate in AVCodecInternal.hwaccel_priv_data.
Definition: avcodec.h:2554
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:147
reference-counted frame API
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1237
uint32_t end_display_time
Definition: avcodec.h:2697
int64_t pts
Same as packet pts, in AV_TIME_BASE.
Definition: avcodec.h:2700
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:485
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: codec_desc.h:54
size_t crop_top
Definition: frame.h:668
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
int initial_pool_size
Initial size of the frame pool.
Definition: hwcontext.h:199
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
Definition: bsf.c:522
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
Definition: avpacket.c:572
int channels
number of audio channels, only used for audio.
Definition: frame.h:614
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:545
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1655
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1796
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:2416
#define FFMIN(a, b)
Definition: common.h:96
AVBufferRef ** extended_buf
For planar audio which requires more than AV_NUM_DATA_POINTERS AVBufferRef pointers, this array will hold all the references which cannot fit into AVFrame.buf.
Definition: frame.h:513
int channels
Definition: decode.c:64
AVFrame * compat_decode_frame
Definition: internal.h:189
int width
picture width / height.
Definition: avcodec.h:699
uint8_t w
Definition: llviddspenc.c:38
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames...
Definition: avcodec.h:2226
static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
Definition: decode.c:1692
static int compat_decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, const AVPacket *pkt)
Definition: decode.c:745
AVPacket * in_pkt
Definition: internal.h:112
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: packet.h:228
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AVFormatContext * ctx
Definition: movenc.c:48
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1140
AVFrameSideDataType
Definition: frame.h:48
#define AVERROR_INPUT_CHANGED
Input changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_OUTPUT_CHANGED) ...
Definition: error.h:73
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
uint16_t format
Definition: avcodec.h:2695
#define s(width, name)
Definition: cbs_vp9.c:257
The data contains an ICC profile as an opaque octet buffer following the format described by ISO 1507...
Definition: frame.h:143
#define FF_DEBUG_BUFFERS
Definition: avcodec.h:1633
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
Definition: avcodec.h:1683
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1666
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
const char * bsfs
Decoding only, a comma-separated list of bitstream filters to apply to packets before decoding...
Definition: codec.h:314
DecodeSimpleContext ds
Definition: internal.h:140
int avpriv_packet_list_put(AVPacketList **packet_buffer, AVPacketList **plast_pktl, AVPacket *pkt, int(*copy)(AVPacket *dst, const AVPacket *src), int flags)
Append an AVPacket to the list.
Definition: avpacket.c:729
char * sub_charenc
DTS of the last frame.
Definition: avcodec.h:2116
static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:1576
int draining
checks API usage: after codec draining, flush is required to resume operation
Definition: internal.h:174
#define FF_ARRAY_ELEMS(a)
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
int linesize[4]
Definition: decode.c:62
int sub_charenc_mode
Subtitles character encoding mode.
Definition: avcodec.h:2124
if(ret)
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: utils.c:1069
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int(* post_process)(void *logctx, AVFrame *frame)
The callback to perform some delayed processing on the frame right before it is returned to the calle...
Definition: decode.h:45
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:381
Content light level (based on CTA-861.3).
Definition: packet.h:235
int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:606
static int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
Definition: decode.c:321
int(* decode)(struct AVCodecContext *, void *outdata, int *outdata_size, struct AVPacket *avpkt)
Definition: codec.h:284
AVPacketList * pkt_props
Definition: internal.h:148
void(* post_process_opaque_free)(void *opaque)
Definition: decode.h:47
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:200
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: decode.c:1668
Libavcodec external API header.
enum AVMediaType codec_type
Definition: avcodec.h:534
int compat_decode_warned
Definition: internal.h:182
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:587
A list of zero terminated key/value strings.
Definition: packet.h:172
int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt->size from avpkt->data into picture.
Definition: decode.c:826
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: frame.h:84
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:607
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_WB16 unsigned int_TMPL byte
Definition: bytestream.h:91
int sample_rate
samples per second
Definition: avcodec.h:1186
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
The codec supports this format via the hw_device_ctx interface.
Definition: codec.h:391
The codec supports this format via the hw_frames_ctx interface.
Definition: codec.h:404
int initial_sample_rate
Definition: internal.h:203
int debug
debug
Definition: avcodec.h:1611
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
const AVCodecHWConfig * avcodec_get_hw_config(const AVCodec *codec, int index)
Retrieve supported hardware configurations for a codec.
Definition: utils.c:1833
main external API structure.
Definition: avcodec.h:526
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:606
int skip_samples_multiplier
Definition: internal.h:194
uint8_t * data
The data buffer.
Definition: buffer.h:89
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:226
static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
Definition: decode.c:1949
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
Definition: utils.c:1114
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:396
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1879
uint8_t * data
Definition: frame.h:216
int avpriv_packet_list_get(AVPacketList **pkt_buffer, AVPacketList **pkt_buffer_end, AVPacket *pkt)
Remove the oldest AVPacket in the list and return it.
Definition: avpacket.c:766
#define AV_CODEC_PROP_BITMAP_SUB
Subtitle codec is bitmap based Decoded AVSubtitle data can be read from the AVSubtitleRect->pict fiel...
Definition: codec_desc.h:97
int av_samples_copy(uint8_t **dst, uint8_t *const *src, int dst_offset, int src_offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Copy samples from src to dst.
Definition: samplefmt.c:213
size_t crop_right
Definition: frame.h:671
int64_t max_samples
The number of samples per frame to maximally accept.
Definition: avcodec.h:2344
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int coded_height
Definition: avcodec.h:714
int64_t reordered_opaque
reordered opaque 64 bits (generally an integer or a double precision float PTS but can be anything)...
Definition: frame.h:475
int sample_rate
Sample rate of the audio data.
Definition: frame.h:480
int(* get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)
This callback is called at the beginning of each frame to get data buffer(s) for it.
Definition: avcodec.h:1341
int showed_multi_packet_warning
Definition: internal.h:192
Definition: f_ebur128.c:91
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:739
const char * av_hwdevice_get_type_name(enum AVHWDeviceType type)
Get the string name of an AVHWDeviceType.
Definition: hwcontext.c:92
#define AV_CODEC_CAP_SUBFRAMES
Codec can output multiple frames per AVPacket Normally demuxers return one frame at a time...
Definition: codec.h:93
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:303
int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Get the required buffer size for the given audio parameters.
Definition: samplefmt.c:119
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1154
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1147
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
Definition: utils.c:2089
Recommmends skipping the specified number of samples.
Definition: packet.h:156
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:124
int sub_text_format
Control the form of AVSubtitle.rects[N]->ass.
Definition: avcodec.h:2233
int av_image_fill_plane_sizes(size_t sizes[4], enum AVPixelFormat pix_fmt, int height, const ptrdiff_t linesizes[4])
Fill plane sizes for an image with pixel format pix_fmt and height height.
Definition: imgutils.c:111
int skip_samples
Number of audio samples to skip at the start of the next decoded frame.
Definition: internal.h:164
#define STRIDE_ALIGN
Definition: internal.h:108
enum AVChromaLocation chroma_location
Definition: frame.h:565
int(* frame_params)(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Fill the given hw_frames context with current codec parameters.
Definition: avcodec.h:2569
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:572
attribute_deprecated int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:1357
AVBufferRef * pool
Definition: internal.h:136
#define AV_CODEC_FLAG_DROPCHANGED
Don&#39;t output frames whose parameters differ from first decoded frame in stream.
Definition: avcodec.h:292
int size
Size of data in bytes.
Definition: buffer.h:93
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:566
static int64_t pts
#define SIZE_SPECIFIER
Definition: internal.h:229
#define flags(name, subs,...)
Definition: cbs_av1.c:560
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: packet.h:99
#define FF_CODEC_CAP_SETS_PKT_DTS
Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set AVFrame.pkt_dts manually.
Definition: internal.h:55
int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, enum AVHWDeviceType dev_type)
Make sure avctx.hw_frames_ctx is set.
Definition: decode.c:1150
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
static void decode_data_free(void *opaque, uint8_t *data)
Definition: decode.c:1842
#define UTF8_MAX_BYTES
Definition: decode.c:847
attribute_deprecated int64_t pkt_pts
PTS copied from the AVPacket that was decoded to produce this frame.
Definition: frame.h:409
Timecode which conforms to SMPTE ST 12-1:2014.
Definition: packet.h:291
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
Definition: bprint.c:227
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AVPacket * buffer_pkt
buffers for using new encode/decode API through legacy API
Definition: internal.h:179
int64_t pkt_dts
DTS copied from the AVPacket that triggered returning this frame.
Definition: frame.h:417
A reference to a data buffer.
Definition: buffer.h:81
int extra_hw_frames
Definition: avcodec.h:2328
static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame)
Definition: decode.c:168
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: packet.h:374
This struct stores per-frame lavc-internal data and is attached to it via private_ref.
Definition: decode.h:34
int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, AVBufferRef *device_ref, enum AVPixelFormat hw_pix_fmt, AVBufferRef **out_frames_ref)
Create and return a AVHWFramesContext with values adequate for hardware decoding. ...
Definition: decode.c:1201
static enum AVPixelFormat hw_pix_fmt
Definition: hw_decode.c:46
#define AV_PKT_FLAG_DISCARD
Flag is used to discard packets which are required to maintain valid decoder state but are not requir...
Definition: packet.h:408
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
common internal api header.
common internal and external API header
AVBufferPool * av_buffer_pool_init(int size, AVBufferRef *(*alloc)(int size))
Allocate and initialize a buffer pool.
Definition: buffer.c:266
#define AV_HWACCEL_CODEC_CAP_EXPERIMENTAL
HWAccel is experimental and is thus avoided in favor of non experimental codecs.
Definition: avcodec.h:2576
#define AV_CODEC_CAP_PARAM_CHANGE
Codec supports changed parameters at any point.
Definition: codec.h:114
AVBufferRef * av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
Allocate an AVHWFramesContext tied to a given device context.
Definition: hwcontext.c:247
static void insert_ts(AVBPrint *buf, int ts)
Definition: decode.c:926
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:169
int caps_internal
Internal codec capabilities.
Definition: codec.h:308
int den
Denominator.
Definition: rational.h:60
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:288
uint64_t initial_channel_layout
Definition: internal.h:205
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
Definition: decode.c:1621
Formatted text, the ass field must be set by the decoder and is authoritative.
Definition: avcodec.h:2654
#define FF_PSEUDOPAL
Definition: internal.h:335
AVHWDeviceType
Definition: hwcontext.h:27
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int channels
number of audio channels
Definition: avcodec.h:1187
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:561
char * ass
0 terminated ASS/SSA compatible event line.
Definition: avcodec.h:2689
#define AV_FRAME_FLAG_DISCARD
A flag to mark the frames which need to be decoded, but shouldn&#39;t be output.
Definition: frame.h:537
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:613
enum AVColorPrimaries color_primaries
Definition: frame.h:554
static int extract_packet_props(AVCodecInternal *avci, AVPacket *pkt)
Definition: decode.c:148
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:362
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
int64_t pts_correction_last_dts
PTS of the last frame.
Definition: avcodec.h:2109
size_t compat_decode_partial_size
Definition: internal.h:188
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:317
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1217
#define IS_EMPTY(pkt)
Definition: decode.c:146
static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
Definition: decode.c:1465
int height
Definition: frame.h:366
#define av_freep(p)
int64_t pts_correction_num_faulty_pts
Current statistics for PTS correction.
Definition: avcodec.h:2106
enum AVColorTransferCharacteristic color_trc
Definition: frame.h:556
static float sub(float src0, float src1)
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
AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)
Allocate a new AVBuffer, reusing an old buffer from the pool when available.
Definition: buffer.c:364
Recommmends skipping the specified number of samples.
Definition: frame.h:108
void * hwaccel_priv
Per-frame private data for hwaccels.
Definition: decode.h:52
#define av_malloc_array(a, b)
enum AVHWDeviceType device_type
The device type associated with the configuration.
Definition: codec.h:444
#define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS
Definition: avcodec.h:2236
#define FF_SUB_CHARENC_MODE_IGNORE
neither convert the subtitles, nor check them for valid UTF-8
Definition: avcodec.h:2128
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:2489
ReplayGain information in the form of the AVReplayGain struct.
Definition: frame.h:76
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
Apply the maximum possible cropping, even if it requires setting the AVFrame.data[] entries to unalig...
Definition: frame.h:953
enum AVSubtitleType type
Definition: avcodec.h:2680
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:355
int format
Definition: decode.c:59
AVBufferRef * hw_device_ctx
A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/d...
Definition: avcodec.h:2278
int pkt_size
size of the corresponding packet containing the compressed frame.
Definition: frame.h:623
float min
Stereoscopic 3d metadata.
Definition: frame.h:63
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:340
AVCodecParameters * par_in
Parameters of the input stream.
Definition: bsf.h:77
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:509
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:374
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1589
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:356
enum AVPixelFormat sw_pix_fmt
Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:2076
for(j=16;j >0;--j)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:671
int i
Definition: input.c:407
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
static void hwaccel_uninit(AVCodecContext *avctx)
Definition: decode.c:1287
#define tb
Definition: regdef.h:68
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:190
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition: packet.h:120
static uint8_t tmp[11]
Definition: aes_ctr.c:26