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pthread_frame.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * Frame multithreading support functions
22  * @see doc/multithreading.txt
23  */
24 
25 #include "config.h"
26 
27 #include <stdint.h>
28 
29 #if HAVE_PTHREADS
30 #include <pthread.h>
31 #elif HAVE_W32THREADS
32 #include "compat/w32pthreads.h"
33 #elif HAVE_OS2THREADS
34 #include "compat/os2threads.h"
35 #endif
36 
37 #include "avcodec.h"
38 #include "internal.h"
39 #include "pthread_internal.h"
40 #include "thread.h"
41 
42 #include "libavutil/avassert.h"
43 #include "libavutil/buffer.h"
44 #include "libavutil/common.h"
45 #include "libavutil/cpu.h"
46 #include "libavutil/frame.h"
47 #include "libavutil/log.h"
48 #include "libavutil/mem.h"
49 
50 /**
51  * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
52  */
53 typedef struct PerThreadContext {
55 
58  pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
59  pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
60  pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
61 
62  pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
63  pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
64 
65  AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
66 
67  AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
68 
69  AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
70  int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
71  int result; ///< The result of the last codec decode/encode() call.
72 
73  enum {
74  STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
75  STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
77  * Set when the codec calls get_buffer().
78  * State is returned to STATE_SETTING_UP afterwards.
79  */
81  * Set when the codec calls get_format().
82  * State is returned to STATE_SETTING_UP afterwards.
83  */
84  STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
85  } state;
86 
87  /**
88  * Array of frames passed to ff_thread_release_buffer().
89  * Frames are released after all threads referencing them are finished.
90  */
94 
95  AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
96  int requested_flags; ///< flags passed to get_buffer() for requested_frame
97 
98  const enum AVPixelFormat *available_formats; ///< Format array for get_format()
99  enum AVPixelFormat result_format; ///< get_format() result
101 
102 /**
103  * Context stored in the client AVCodecInternal thread_ctx.
104  */
105 typedef struct FrameThreadContext {
106  PerThreadContext *threads; ///< The contexts for each thread.
107  PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
108 
109  pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
110 
111  int next_decoding; ///< The next context to submit a packet to.
112  int next_finished; ///< The next context to return output from.
113 
114  int delaying; /**<
115  * Set for the first N packets, where N is the number of threads.
116  * While it is set, ff_thread_en/decode_frame won't return any results.
117  */
118 
119  int die; ///< Set when threads should exit.
121 
122 #if FF_API_GET_BUFFER
123 #define THREAD_SAFE_CALLBACKS(avctx) \
124 ((avctx)->thread_safe_callbacks || (!(avctx)->get_buffer && (avctx)->get_buffer2 == avcodec_default_get_buffer2))
125 #else
126 #define THREAD_SAFE_CALLBACKS(avctx) \
127 ((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
128 #endif
129 
130 /**
131  * Codec worker thread.
132  *
133  * Automatically calls ff_thread_finish_setup() if the codec does
134  * not provide an update_thread_context method, or if the codec returns
135  * before calling it.
136  */
137 static attribute_align_arg void *frame_worker_thread(void *arg)
138 {
139  PerThreadContext *p = arg;
140  FrameThreadContext *fctx = p->parent;
141  AVCodecContext *avctx = p->avctx;
142  const AVCodec *codec = avctx->codec;
143 
145  while (1) {
146  while (p->state == STATE_INPUT_READY && !fctx->die)
148 
149  if (fctx->die) break;
150 
151  if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
152  ff_thread_finish_setup(avctx);
153 
154  av_frame_unref(p->frame);
155  p->got_frame = 0;
156  p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
157 
158  if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
159  if (avctx->internal->allocate_progress)
160  av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
161  "free the frame on failure. This is a bug, please report it.\n");
162  av_frame_unref(p->frame);
163  }
164 
165  if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
166 
168 #if 0 //BUFREF-FIXME
169  for (i = 0; i < MAX_BUFFERS; i++)
170  if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
171  p->progress[i][0] = INT_MAX;
172  p->progress[i][1] = INT_MAX;
173  }
174 #endif
175  p->state = STATE_INPUT_READY;
176 
180  }
182 
183  return NULL;
184 }
185 
186 /**
187  * Update the next thread's AVCodecContext with values from the reference thread's context.
188  *
189  * @param dst The destination context.
190  * @param src The source context.
191  * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
192  */
194 {
195  int err = 0;
196 
197  if (dst != src) {
198  dst->time_base = src->time_base;
199  dst->width = src->width;
200  dst->height = src->height;
201  dst->pix_fmt = src->pix_fmt;
202 
203  dst->coded_width = src->coded_width;
204  dst->coded_height = src->coded_height;
205 
206  dst->has_b_frames = src->has_b_frames;
207  dst->idct_algo = src->idct_algo;
208 
212 
213  dst->profile = src->profile;
214  dst->level = src->level;
215 
217  dst->ticks_per_frame = src->ticks_per_frame;
218  dst->color_primaries = src->color_primaries;
219 
220  dst->color_trc = src->color_trc;
221  dst->colorspace = src->colorspace;
222  dst->color_range = src->color_range;
224 
225  dst->hwaccel = src->hwaccel;
226  dst->hwaccel_context = src->hwaccel_context;
227 
228  dst->channels = src->channels;
229  dst->sample_rate = src->sample_rate;
230  dst->sample_fmt = src->sample_fmt;
231  dst->channel_layout = src->channel_layout;
233  }
234 
235  if (for_user) {
236  dst->delay = src->thread_count - 1;
237  dst->coded_frame = src->coded_frame;
238  } else {
239  if (dst->codec->update_thread_context)
240  err = dst->codec->update_thread_context(dst, src);
241  }
242 
243  return err;
244 }
245 
246 /**
247  * Update the next thread's AVCodecContext with values set by the user.
248  *
249  * @param dst The destination context.
250  * @param src The source context.
251  * @return 0 on success, negative error code on failure
252  */
254 {
255 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
256  dst->flags = src->flags;
257 
258  dst->draw_horiz_band= src->draw_horiz_band;
259  dst->get_buffer2 = src->get_buffer2;
260 #if FF_API_GET_BUFFER
262  dst->get_buffer = src->get_buffer;
263  dst->release_buffer = src->release_buffer;
265 #endif
266 
267  dst->opaque = src->opaque;
268  dst->debug = src->debug;
269  dst->debug_mv = src->debug_mv;
270 
271  dst->slice_flags = src->slice_flags;
272  dst->flags2 = src->flags2;
273 
274  copy_fields(skip_loop_filter, subtitle_header);
275 
276  dst->frame_number = src->frame_number;
279 
280  if (src->slice_count && src->slice_offset) {
281  if (dst->slice_count < src->slice_count) {
282  int *tmp = av_realloc(dst->slice_offset, src->slice_count *
283  sizeof(*dst->slice_offset));
284  if (!tmp) {
285  av_free(dst->slice_offset);
286  return AVERROR(ENOMEM);
287  }
288  dst->slice_offset = tmp;
289  }
290  memcpy(dst->slice_offset, src->slice_offset,
291  src->slice_count * sizeof(*dst->slice_offset));
292  }
293  dst->slice_count = src->slice_count;
294  return 0;
295 #undef copy_fields
296 }
297 
298 /// Releases the buffers that this decoding thread was the last user of.
300 {
301  FrameThreadContext *fctx = p->parent;
302 
303  while (p->num_released_buffers > 0) {
304  AVFrame *f;
305 
307 
308  // fix extended data in case the caller screwed it up
312  f->extended_data = f->data;
313  av_frame_unref(f);
314 
316  }
317 }
318 
320 {
321  FrameThreadContext *fctx = p->parent;
322  PerThreadContext *prev_thread = fctx->prev_thread;
323  const AVCodec *codec = p->avctx->codec;
324 
325  if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
326 
328 
330 
331  if (prev_thread) {
332  int err;
333  if (prev_thread->state == STATE_SETTING_UP) {
334  pthread_mutex_lock(&prev_thread->progress_mutex);
335  while (prev_thread->state == STATE_SETTING_UP)
336  pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
337  pthread_mutex_unlock(&prev_thread->progress_mutex);
338  }
339 
340  err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
341  if (err) {
343  return err;
344  }
345  }
346 
347  av_packet_unref(&p->avpkt);
348  av_packet_ref(&p->avpkt, avpkt);
349 
350  p->state = STATE_SETTING_UP;
353 
354  /*
355  * If the client doesn't have a thread-safe get_buffer(),
356  * then decoding threads call back to the main thread,
357  * and it calls back to the client here.
358  */
359 
361  if (!p->avctx->thread_safe_callbacks && (
364  p->avctx->get_buffer ||
365 #endif
368  while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
369  int call_done = 1;
371  while (p->state == STATE_SETTING_UP)
373 
374  switch (p->state) {
375  case STATE_GET_BUFFER:
377  break;
378  case STATE_GET_FORMAT:
380  break;
381  default:
382  call_done = 0;
383  break;
384  }
385  if (call_done) {
386  p->state = STATE_SETTING_UP;
388  }
390  }
391  }
392 
393  fctx->prev_thread = p;
394  fctx->next_decoding++;
395 
396  return 0;
397 }
398 
400  AVFrame *picture, int *got_picture_ptr,
401  AVPacket *avpkt)
402 {
403  FrameThreadContext *fctx = avctx->internal->thread_ctx;
404  int finished = fctx->next_finished;
405  PerThreadContext *p;
406  int err;
407 
408  /*
409  * Submit a packet to the next decoding thread.
410  */
411 
412  p = &fctx->threads[fctx->next_decoding];
413  err = update_context_from_user(p->avctx, avctx);
414  if (err) return err;
415  err = submit_packet(p, avpkt);
416  if (err) return err;
417 
418  /*
419  * If we're still receiving the initial packets, don't return a frame.
420  */
421 
422  if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
423  fctx->delaying = 0;
424 
425  if (fctx->delaying) {
426  *got_picture_ptr=0;
427  if (avpkt->size)
428  return avpkt->size;
429  }
430 
431  /*
432  * Return the next available frame from the oldest thread.
433  * If we're at the end of the stream, then we have to skip threads that
434  * didn't output a frame, because we don't want to accidentally signal
435  * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
436  */
437 
438  do {
439  p = &fctx->threads[finished++];
440 
441  if (p->state != STATE_INPUT_READY) {
443  while (p->state != STATE_INPUT_READY)
446  }
447 
448  av_frame_move_ref(picture, p->frame);
449  *got_picture_ptr = p->got_frame;
450  picture->pkt_dts = p->avpkt.dts;
451 
452  /*
453  * A later call with avkpt->size == 0 may loop over all threads,
454  * including this one, searching for a frame to return before being
455  * stopped by the "finished != fctx->next_finished" condition.
456  * Make sure we don't mistakenly return the same frame again.
457  */
458  p->got_frame = 0;
459 
460  if (finished >= avctx->thread_count) finished = 0;
461  } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
462 
463  update_context_from_thread(avctx, p->avctx, 1);
464 
465  if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
466 
467  fctx->next_finished = finished;
468 
469  /* return the size of the consumed packet if no error occurred */
470  return (p->result >= 0) ? avpkt->size : p->result;
471 }
472 
473 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
474 {
475  PerThreadContext *p;
476  volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
477 
478  if (!progress || progress[field] >= n) return;
479 
480  p = f->owner->internal->thread_ctx;
481 
482  if (f->owner->debug&FF_DEBUG_THREADS)
483  av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
484 
486  progress[field] = n;
489 }
490 
491 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
492 {
493  PerThreadContext *p;
494  volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
495 
496  if (!progress || progress[field] >= n) return;
497 
498  p = f->owner->internal->thread_ctx;
499 
500  if (f->owner->debug&FF_DEBUG_THREADS)
501  av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
502 
504  while (progress[field] < n)
507 }
508 
510  PerThreadContext *p = avctx->internal->thread_ctx;
511 
512  if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
513 
514  if(p->state == STATE_SETUP_FINISHED){
515  av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
516  }
517 
519  p->state = STATE_SETUP_FINISHED;
522 }
523 
524 /// Waits for all threads to finish.
525 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
526 {
527  int i;
528 
529  for (i = 0; i < thread_count; i++) {
530  PerThreadContext *p = &fctx->threads[i];
531 
532  if (p->state != STATE_INPUT_READY) {
534  while (p->state != STATE_INPUT_READY)
537  }
538  p->got_frame = 0;
539  }
540 }
541 
542 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
543 {
544  FrameThreadContext *fctx = avctx->internal->thread_ctx;
545  const AVCodec *codec = avctx->codec;
546  int i;
547 
548  park_frame_worker_threads(fctx, thread_count);
549 
550  if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
551  if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
552  av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
554  fctx->threads->avctx->internal->is_copy = 1;
555  }
556 
557  fctx->die = 1;
558 
559  for (i = 0; i < thread_count; i++) {
560  PerThreadContext *p = &fctx->threads[i];
561 
565 
566  if (p->thread_init)
567  pthread_join(p->thread, NULL);
568  p->thread_init=0;
569 
570  if (codec->close)
571  codec->close(p->avctx);
572 
573  avctx->codec = NULL;
574 
576  av_frame_free(&p->frame);
577  }
578 
579  for (i = 0; i < thread_count; i++) {
580  PerThreadContext *p = &fctx->threads[i];
581 
587  av_packet_unref(&p->avpkt);
589 
590  if (i) {
591  av_freep(&p->avctx->priv_data);
593  }
594 
595  av_freep(&p->avctx->internal);
596  av_freep(&p->avctx);
597  }
598 
599  av_freep(&fctx->threads);
601  av_freep(&avctx->internal->thread_ctx);
602 }
603 
605 {
606  int thread_count = avctx->thread_count;
607  const AVCodec *codec = avctx->codec;
608  AVCodecContext *src = avctx;
609  FrameThreadContext *fctx;
610  int i, err = 0;
611 
612 #if HAVE_W32THREADS
613  w32thread_init();
614 #endif
615 
616  if (!thread_count) {
617  int nb_cpus = av_cpu_count();
618  if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
619  nb_cpus = 1;
620  // use number of cores + 1 as thread count if there is more than one
621  if (nb_cpus > 1)
622  thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
623  else
624  thread_count = avctx->thread_count = 1;
625  }
626 
627  if (thread_count <= 1) {
628  avctx->active_thread_type = 0;
629  return 0;
630  }
631 
632  avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
633 
634  fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
635  pthread_mutex_init(&fctx->buffer_mutex, NULL);
636  fctx->delaying = 1;
637 
638  for (i = 0; i < thread_count; i++) {
640  PerThreadContext *p = &fctx->threads[i];
641 
642  pthread_mutex_init(&p->mutex, NULL);
644  pthread_cond_init(&p->input_cond, NULL);
645  pthread_cond_init(&p->progress_cond, NULL);
646  pthread_cond_init(&p->output_cond, NULL);
647 
648  p->frame = av_frame_alloc();
649  if (!p->frame) {
650  err = AVERROR(ENOMEM);
651  av_freep(&copy);
652  goto error;
653  }
654 
655  p->parent = fctx;
656  p->avctx = copy;
657 
658  if (!copy) {
659  err = AVERROR(ENOMEM);
660  goto error;
661  }
662 
663  *copy = *src;
664 
665  copy->internal = av_malloc(sizeof(AVCodecInternal));
666  if (!copy->internal) {
667  err = AVERROR(ENOMEM);
668  goto error;
669  }
670  *copy->internal = *src->internal;
671  copy->internal->thread_ctx = p;
672  copy->internal->pkt = &p->avpkt;
673 
674  if (!i) {
675  src = copy;
676 
677  if (codec->init)
678  err = codec->init(copy);
679 
680  update_context_from_thread(avctx, copy, 1);
681  } else {
682  copy->priv_data = av_malloc(codec->priv_data_size);
683  if (!copy->priv_data) {
684  err = AVERROR(ENOMEM);
685  goto error;
686  }
687  memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
688  copy->internal->is_copy = 1;
689 
690  if (codec->init_thread_copy)
691  err = codec->init_thread_copy(copy);
692  }
693 
694  if (err) goto error;
695 
696  err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
697  p->thread_init= !err;
698  if(!p->thread_init)
699  goto error;
700  }
701 
702  return 0;
703 
704 error:
705  ff_frame_thread_free(avctx, i+1);
706 
707  return err;
708 }
709 
711 {
712  int i;
713  FrameThreadContext *fctx = avctx->internal->thread_ctx;
714 
715  if (!fctx) return;
716 
718  if (fctx->prev_thread) {
719  if (fctx->prev_thread != &fctx->threads[0])
721  }
722 
723  fctx->next_decoding = fctx->next_finished = 0;
724  fctx->delaying = 1;
725  fctx->prev_thread = NULL;
726  for (i = 0; i < avctx->thread_count; i++) {
727  PerThreadContext *p = &fctx->threads[i];
728  // Make sure decode flush calls with size=0 won't return old frames
729  p->got_frame = 0;
730  av_frame_unref(p->frame);
731 
733 
734  if (avctx->codec->flush)
735  avctx->codec->flush(p->avctx);
736  }
737 }
738 
740 {
741  PerThreadContext *p = avctx->internal->thread_ctx;
742  if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
743  (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
744  return 0;
745  }
746  return 1;
747 }
748 
750 {
751  PerThreadContext *p = avctx->internal->thread_ctx;
752  int err;
753 
754  f->owner = avctx;
755 
756  ff_init_buffer_info(avctx, f->f);
757 
758  if (!(avctx->active_thread_type & FF_THREAD_FRAME))
759  return ff_get_buffer(avctx, f->f, flags);
760 
761  if (p->state != STATE_SETTING_UP &&
762  (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
763  av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
764  return -1;
765  }
766 
767  if (avctx->internal->allocate_progress) {
768  int *progress;
769  f->progress = av_buffer_alloc(2 * sizeof(int));
770  if (!f->progress) {
771  return AVERROR(ENOMEM);
772  }
773  progress = (int*)f->progress->data;
774 
775  progress[0] = progress[1] = -1;
776  }
777 
780  if (avctx->thread_safe_callbacks || (
782  !avctx->get_buffer &&
783 #endif
786  err = ff_get_buffer(avctx, f->f, flags);
787  } else {
789  p->requested_frame = f->f;
790  p->requested_flags = flags;
791  p->state = STATE_GET_BUFFER;
793 
794  while (p->state != STATE_SETTING_UP)
796 
797  err = p->result;
798 
800 
801  }
802  if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
803  ff_thread_finish_setup(avctx);
804 
805  if (err)
807 
809 
810  return err;
811 }
812 
814 {
815  enum AVPixelFormat res;
816  PerThreadContext *p = avctx->internal->thread_ctx;
817  if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
819  return ff_get_format(avctx, fmt);
820  if (p->state != STATE_SETTING_UP) {
821  av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
822  return -1;
823  }
825  p->available_formats = fmt;
826  p->state = STATE_GET_FORMAT;
828 
829  while (p->state != STATE_SETTING_UP)
831 
832  res = p->result_format;
833 
835 
836  return res;
837 }
838 
840 {
841  int ret = thread_get_buffer_internal(avctx, f, flags);
842  if (ret < 0)
843  av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
844  return ret;
845 }
846 
848 {
849  PerThreadContext *p = avctx->internal->thread_ctx;
850  FrameThreadContext *fctx;
851  AVFrame *dst, *tmp;
853  int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
854  avctx->thread_safe_callbacks ||
855  (
857  !avctx->get_buffer &&
858 #endif
861 
862  if (!f->f || !f->f->buf[0])
863  return;
864 
865  if (avctx->debug & FF_DEBUG_BUFFERS)
866  av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
867 
869  f->owner = NULL;
870 
871  if (can_direct_free) {
872  av_frame_unref(f->f);
873  return;
874  }
875 
876  fctx = p->parent;
878 
879  if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
880  goto fail;
882  (p->num_released_buffers + 1) *
883  sizeof(*p->released_buffers));
884  if (!tmp)
885  goto fail;
886  p->released_buffers = tmp;
887 
889  av_frame_move_ref(dst, f->f);
890 
892 
893 fail:
895 }