FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
pthread_frame.c
Go to the documentation of this file.
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 #include "avcodec.h"
30 #include "internal.h"
31 #include "pthread_internal.h"
32 #include "thread.h"
33 #include "version.h"
34 
35 #include "libavutil/avassert.h"
36 #include "libavutil/buffer.h"
37 #include "libavutil/common.h"
38 #include "libavutil/cpu.h"
39 #include "libavutil/frame.h"
40 #include "libavutil/internal.h"
41 #include "libavutil/log.h"
42 #include "libavutil/mem.h"
43 #include "libavutil/opt.h"
44 #include "libavutil/thread.h"
45 
46 /**
47  * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
48  */
49 typedef struct PerThreadContext {
51 
54  pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
55  pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
56  pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
57 
58  pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
59  pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
60 
61  AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
62 
63  AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
64 
65  AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
66  int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
67  int result; ///< The result of the last codec decode/encode() call.
68 
69  enum {
70  STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
71  STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
73  * Set when the codec calls get_buffer().
74  * State is returned to STATE_SETTING_UP afterwards.
75  */
77  * Set when the codec calls get_format().
78  * State is returned to STATE_SETTING_UP afterwards.
79  */
80  STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
81  } state;
82 
83  /**
84  * Array of frames passed to ff_thread_release_buffer().
85  * Frames are released after all threads referencing them are finished.
86  */
90 
91  AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
92  int requested_flags; ///< flags passed to get_buffer() for requested_frame
93 
94  const enum AVPixelFormat *available_formats; ///< Format array for get_format()
95  enum AVPixelFormat result_format; ///< get_format() result
97 
98 /**
99  * Context stored in the client AVCodecInternal thread_ctx.
100  */
101 typedef struct FrameThreadContext {
102  PerThreadContext *threads; ///< The contexts for each thread.
103  PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
104 
105  pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
106 
107  int next_decoding; ///< The next context to submit a packet to.
108  int next_finished; ///< The next context to return output from.
109 
110  int delaying; /**<
111  * Set for the first N packets, where N is the number of threads.
112  * While it is set, ff_thread_en/decode_frame won't return any results.
113  */
114 
115  int die; ///< Set when threads should exit.
117 
118 #define THREAD_SAFE_CALLBACKS(avctx) \
119 ((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
120 
121 /**
122  * Codec worker thread.
123  *
124  * Automatically calls ff_thread_finish_setup() if the codec does
125  * not provide an update_thread_context method, or if the codec returns
126  * before calling it.
127  */
128 static attribute_align_arg void *frame_worker_thread(void *arg)
129 {
130  PerThreadContext *p = arg;
131  FrameThreadContext *fctx = p->parent;
132  AVCodecContext *avctx = p->avctx;
133  const AVCodec *codec = avctx->codec;
134 
136  while (1) {
137  while (p->state == STATE_INPUT_READY && !fctx->die)
139 
140  if (fctx->die) break;
141 
142  if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
143  ff_thread_finish_setup(avctx);
144 
145  av_frame_unref(p->frame);
146  p->got_frame = 0;
147  p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
148 
149  if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
150  if (avctx->internal->allocate_progress)
151  av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
152  "free the frame on failure. This is a bug, please report it.\n");
153  av_frame_unref(p->frame);
154  }
155 
156  if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
157 
159 #if 0 //BUFREF-FIXME
160  for (i = 0; i < MAX_BUFFERS; i++)
161  if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
162  p->progress[i][0] = INT_MAX;
163  p->progress[i][1] = INT_MAX;
164  }
165 #endif
166  p->state = STATE_INPUT_READY;
167 
171  }
173 
174  return NULL;
175 }
176 
177 /**
178  * Update the next thread's AVCodecContext with values from the reference thread's context.
179  *
180  * @param dst The destination context.
181  * @param src The source context.
182  * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
183  * @return 0 on success, negative error code on failure
184  */
186 {
187  int err = 0;
188 
189  if (dst != src) {
190  dst->time_base = src->time_base;
191  dst->framerate = src->framerate;
192  dst->width = src->width;
193  dst->height = src->height;
194  dst->pix_fmt = src->pix_fmt;
195 
196  dst->coded_width = src->coded_width;
197  dst->coded_height = src->coded_height;
198 
199  dst->has_b_frames = src->has_b_frames;
200  dst->idct_algo = src->idct_algo;
201 
204 #if FF_API_AFD
208 #endif /* FF_API_AFD */
209 
210  dst->profile = src->profile;
211  dst->level = src->level;
212 
214  dst->ticks_per_frame = src->ticks_per_frame;
215  dst->color_primaries = src->color_primaries;
216 
217  dst->color_trc = src->color_trc;
218  dst->colorspace = src->colorspace;
219  dst->color_range = src->color_range;
221 
222  dst->hwaccel = src->hwaccel;
223  dst->hwaccel_context = src->hwaccel_context;
224 
225  dst->channels = src->channels;
226  dst->sample_rate = src->sample_rate;
227  dst->sample_fmt = src->sample_fmt;
228  dst->channel_layout = src->channel_layout;
230  }
231 
232  if (for_user) {
233  dst->delay = src->thread_count - 1;
234 #if FF_API_CODED_FRAME
236  dst->coded_frame = src->coded_frame;
238 #endif
239  } else {
240  if (dst->codec->update_thread_context)
241  err = dst->codec->update_thread_context(dst, src);
242  }
243 
244  return err;
245 }
246 
247 /**
248  * Update the next thread's AVCodecContext with values set by the user.
249  *
250  * @param dst The destination context.
251  * @param src The source context.
252  * @return 0 on success, negative error code on failure
253  */
255 {
256 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
257  dst->flags = src->flags;
258 
259  dst->draw_horiz_band= src->draw_horiz_band;
260  dst->get_buffer2 = src->get_buffer2;
261 
262  dst->opaque = src->opaque;
263  dst->debug = src->debug;
264  dst->debug_mv = src->debug_mv;
265 
266  dst->slice_flags = src->slice_flags;
267  dst->flags2 = src->flags2;
268 
269  copy_fields(skip_loop_filter, subtitle_header);
270 
271  dst->frame_number = src->frame_number;
274 
275  if (src->slice_count && src->slice_offset) {
276  if (dst->slice_count < src->slice_count) {
277  int err = av_reallocp_array(&dst->slice_offset, src->slice_count,
278  sizeof(*dst->slice_offset));
279  if (err < 0)
280  return err;
281  }
282  memcpy(dst->slice_offset, src->slice_offset,
283  src->slice_count * sizeof(*dst->slice_offset));
284  }
285  dst->slice_count = src->slice_count;
286  return 0;
287 #undef copy_fields
288 }
289 
290 /// Releases the buffers that this decoding thread was the last user of.
292 {
293  FrameThreadContext *fctx = p->parent;
294 
295  while (p->num_released_buffers > 0) {
296  AVFrame *f;
297 
299 
300  // fix extended data in case the caller screwed it up
304  f->extended_data = f->data;
305  av_frame_unref(f);
306 
308  }
309 }
310 
312 {
313  FrameThreadContext *fctx = p->parent;
314  PerThreadContext *prev_thread = fctx->prev_thread;
315  const AVCodec *codec = p->avctx->codec;
316 
317  if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY))
318  return 0;
319 
321 
323 
324  if (prev_thread) {
325  int err;
326  if (prev_thread->state == STATE_SETTING_UP) {
327  pthread_mutex_lock(&prev_thread->progress_mutex);
328  while (prev_thread->state == STATE_SETTING_UP)
329  pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
330  pthread_mutex_unlock(&prev_thread->progress_mutex);
331  }
332 
333  err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
334  if (err) {
336  return err;
337  }
338  }
339 
340  av_packet_unref(&p->avpkt);
341  av_packet_ref(&p->avpkt, avpkt);
342 
343  p->state = STATE_SETTING_UP;
346 
347  /*
348  * If the client doesn't have a thread-safe get_buffer(),
349  * then decoding threads call back to the main thread,
350  * and it calls back to the client here.
351  */
352 
353  if (!p->avctx->thread_safe_callbacks && (
356  while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
357  int call_done = 1;
359  while (p->state == STATE_SETTING_UP)
361 
362  switch (p->state) {
363  case STATE_GET_BUFFER:
365  break;
366  case STATE_GET_FORMAT:
368  break;
369  default:
370  call_done = 0;
371  break;
372  }
373  if (call_done) {
374  p->state = STATE_SETTING_UP;
376  }
378  }
379  }
380 
381  fctx->prev_thread = p;
382  fctx->next_decoding++;
383 
384  return 0;
385 }
386 
388  AVFrame *picture, int *got_picture_ptr,
389  AVPacket *avpkt)
390 {
391  FrameThreadContext *fctx = avctx->internal->thread_ctx;
392  int finished = fctx->next_finished;
393  PerThreadContext *p;
394  int err;
395 
396  /*
397  * Submit a packet to the next decoding thread.
398  */
399 
400  p = &fctx->threads[fctx->next_decoding];
401  err = update_context_from_user(p->avctx, avctx);
402  if (err) return err;
403  err = submit_packet(p, avpkt);
404  if (err) return err;
405 
406  /*
407  * If we're still receiving the initial packets, don't return a frame.
408  */
409 
410  if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
411  fctx->delaying = 0;
412 
413  if (fctx->delaying) {
414  *got_picture_ptr=0;
415  if (avpkt->size)
416  return avpkt->size;
417  }
418 
419  /*
420  * Return the next available frame from the oldest thread.
421  * If we're at the end of the stream, then we have to skip threads that
422  * didn't output a frame, because we don't want to accidentally signal
423  * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
424  */
425 
426  do {
427  p = &fctx->threads[finished++];
428 
429  if (p->state != STATE_INPUT_READY) {
431  while (p->state != STATE_INPUT_READY)
434  }
435 
436  av_frame_move_ref(picture, p->frame);
437  *got_picture_ptr = p->got_frame;
438  picture->pkt_dts = p->avpkt.dts;
439 
440  if (p->result < 0)
441  err = p->result;
442 
443  /*
444  * A later call with avkpt->size == 0 may loop over all threads,
445  * including this one, searching for a frame to return before being
446  * stopped by the "finished != fctx->next_finished" condition.
447  * Make sure we don't mistakenly return the same frame again.
448  */
449  p->got_frame = 0;
450 
451  if (finished >= avctx->thread_count) finished = 0;
452  } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
453 
454  update_context_from_thread(avctx, p->avctx, 1);
455 
456  if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
457 
458  fctx->next_finished = finished;
459 
460  /*
461  * When no frame was found while flushing, but an error occurred in
462  * any thread, return it instead of 0.
463  * Otherwise the error can get lost.
464  */
465  if (!avpkt->size && !*got_picture_ptr)
466  return err;
467 
468  /* return the size of the consumed packet if no error occurred */
469  return (p->result >= 0) ? avpkt->size : p->result;
470 }
471 
472 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
473 {
474  PerThreadContext *p;
475  volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
476 
477  if (!progress || progress[field] >= n) return;
478 
479  p = f->owner->internal->thread_ctx;
480 
481  if (f->owner->debug&FF_DEBUG_THREADS)
482  av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
483 
485  progress[field] = n;
488 }
489 
490 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
491 {
492  PerThreadContext *p;
493  volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
494 
495  if (!progress || progress[field] >= n) return;
496 
497  p = f->owner->internal->thread_ctx;
498 
499  if (f->owner->debug&FF_DEBUG_THREADS)
500  av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
501 
503  while (progress[field] < n)
506 }
507 
509  PerThreadContext *p = avctx->internal->thread_ctx;
510 
511  if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
512 
513  if(p->state == STATE_SETUP_FINISHED){
514  av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
515  }
516 
518  p->state = STATE_SETUP_FINISHED;
521 }
522 
523 /// Waits for all threads to finish.
524 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
525 {
526  int i;
527 
528  for (i = 0; i < thread_count; i++) {
529  PerThreadContext *p = &fctx->threads[i];
530 
531  if (p->state != STATE_INPUT_READY) {
533  while (p->state != STATE_INPUT_READY)
536  }
537  p->got_frame = 0;
538  }
539 }
540 
541 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
542 {
543  FrameThreadContext *fctx = avctx->internal->thread_ctx;
544  const AVCodec *codec = avctx->codec;
545  int i;
546 
547  park_frame_worker_threads(fctx, thread_count);
548 
549  if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
550  if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
551  av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
553  fctx->threads->avctx->internal->is_copy = 1;
554  }
555 
556  fctx->die = 1;
557 
558  for (i = 0; i < thread_count; i++) {
559  PerThreadContext *p = &fctx->threads[i];
560 
564 
565  if (p->thread_init)
566  pthread_join(p->thread, NULL);
567  p->thread_init=0;
568 
569  if (codec->close && p->avctx)
570  codec->close(p->avctx);
571 
573  av_frame_free(&p->frame);
574  }
575 
576  for (i = 0; i < thread_count; i++) {
577  PerThreadContext *p = &fctx->threads[i];
578 
584  av_packet_unref(&p->avpkt);
586 
587  if (i && p->avctx) {
588  av_freep(&p->avctx->priv_data);
590  }
591 
592  if (p->avctx)
593  av_freep(&p->avctx->internal);
594  av_freep(&p->avctx);
595  }
596 
597  av_freep(&fctx->threads);
599  av_freep(&avctx->internal->thread_ctx);
600 
601  if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
602  av_opt_free(avctx->priv_data);
603  avctx->codec = NULL;
604 }
605 
607 {
608  int thread_count = avctx->thread_count;
609  const AVCodec *codec = avctx->codec;
610  AVCodecContext *src = avctx;
611  FrameThreadContext *fctx;
612  int i, err = 0;
613 
614 #if HAVE_W32THREADS
615  w32thread_init();
616 #endif
617 
618  if (!thread_count) {
619  int nb_cpus = av_cpu_count();
620  if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
621  nb_cpus = 1;
622  // use number of cores + 1 as thread count if there is more than one
623  if (nb_cpus > 1)
624  thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
625  else
626  thread_count = avctx->thread_count = 1;
627  }
628 
629  if (thread_count <= 1) {
630  avctx->active_thread_type = 0;
631  return 0;
632  }
633 
634  avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
635  if (!fctx)
636  return AVERROR(ENOMEM);
637 
638  fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
639  if (!fctx->threads) {
640  av_freep(&avctx->internal->thread_ctx);
641  return AVERROR(ENOMEM);
642  }
643 
645  fctx->delaying = 1;
646 
647  for (i = 0; i < thread_count; i++) {
649  PerThreadContext *p = &fctx->threads[i];
650 
656 
657  p->frame = av_frame_alloc();
658  if (!p->frame) {
659  av_freep(&copy);
660  err = AVERROR(ENOMEM);
661  goto error;
662  }
663 
664  p->parent = fctx;
665  p->avctx = copy;
666 
667  if (!copy) {
668  err = AVERROR(ENOMEM);
669  goto error;
670  }
671 
672  *copy = *src;
673 
674  copy->internal = av_malloc(sizeof(AVCodecInternal));
675  if (!copy->internal) {
676  copy->priv_data = NULL;
677  err = AVERROR(ENOMEM);
678  goto error;
679  }
680  *copy->internal = *src->internal;
681  copy->internal->thread_ctx = p;
682  copy->internal->pkt = &p->avpkt;
683 
684  if (!i) {
685  src = copy;
686 
687  if (codec->init)
688  err = codec->init(copy);
689 
690  update_context_from_thread(avctx, copy, 1);
691  } else {
692  copy->priv_data = av_malloc(codec->priv_data_size);
693  if (!copy->priv_data) {
694  err = AVERROR(ENOMEM);
695  goto error;
696  }
697  memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
698  copy->internal->is_copy = 1;
699 
700  if (codec->init_thread_copy)
701  err = codec->init_thread_copy(copy);
702  }
703 
704  if (err) goto error;
705 
707  p->thread_init= !err;
708  if(!p->thread_init)
709  goto error;
710  }
711 
712  return 0;
713 
714 error:
715  ff_frame_thread_free(avctx, i+1);
716 
717  return err;
718 }
719 
721 {
722  int i;
723  FrameThreadContext *fctx = avctx->internal->thread_ctx;
724 
725  if (!fctx) return;
726 
728  if (fctx->prev_thread) {
729  if (fctx->prev_thread != &fctx->threads[0])
731  }
732 
733  fctx->next_decoding = fctx->next_finished = 0;
734  fctx->delaying = 1;
735  fctx->prev_thread = NULL;
736  for (i = 0; i < avctx->thread_count; i++) {
737  PerThreadContext *p = &fctx->threads[i];
738  // Make sure decode flush calls with size=0 won't return old frames
739  p->got_frame = 0;
740  av_frame_unref(p->frame);
741 
743 
744  if (avctx->codec->flush)
745  avctx->codec->flush(p->avctx);
746  }
747 }
748 
750 {
751  PerThreadContext *p = avctx->internal->thread_ctx;
752  if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
753  (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
754  return 0;
755  }
756  return 1;
757 }
758 
760 {
761  PerThreadContext *p = avctx->internal->thread_ctx;
762  int err;
763 
764  f->owner = avctx;
765 
766  ff_init_buffer_info(avctx, f->f);
767 
768  if (!(avctx->active_thread_type & FF_THREAD_FRAME))
769  return ff_get_buffer(avctx, f->f, flags);
770 
771  if (p->state != STATE_SETTING_UP &&
772  (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
773  av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
774  return -1;
775  }
776 
777  if (avctx->internal->allocate_progress) {
778  int *progress;
779  f->progress = av_buffer_alloc(2 * sizeof(int));
780  if (!f->progress) {
781  return AVERROR(ENOMEM);
782  }
783  progress = (int*)f->progress->data;
784 
785  progress[0] = progress[1] = -1;
786  }
787 
789  if (avctx->thread_safe_callbacks ||
791  err = ff_get_buffer(avctx, f->f, flags);
792  } else {
794  p->requested_frame = f->f;
795  p->requested_flags = flags;
796  p->state = STATE_GET_BUFFER;
798 
799  while (p->state != STATE_SETTING_UP)
801 
802  err = p->result;
803 
805 
806  }
807  if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
808  ff_thread_finish_setup(avctx);
809  if (err)
811 
813 
814  return err;
815 }
816 
818 {
819  enum AVPixelFormat res;
820  PerThreadContext *p = avctx->internal->thread_ctx;
821  if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
823  return ff_get_format(avctx, fmt);
824  if (p->state != STATE_SETTING_UP) {
825  av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
826  return -1;
827  }
829  p->available_formats = fmt;
830  p->state = STATE_GET_FORMAT;
832 
833  while (p->state != STATE_SETTING_UP)
835 
836  res = p->result_format;
837 
839 
840  return res;
841 }
842 
844 {
845  int ret = thread_get_buffer_internal(avctx, f, flags);
846  if (ret < 0)
847  av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
848  return ret;
849 }
850 
852 {
853  PerThreadContext *p = avctx->internal->thread_ctx;
854  FrameThreadContext *fctx;
855  AVFrame *dst, *tmp;
856  int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
857  avctx->thread_safe_callbacks ||
859 
860  if (!f->f || !f->f->buf[0])
861  return;
862 
863  if (avctx->debug & FF_DEBUG_BUFFERS)
864  av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
865 
867  f->owner = NULL;
868 
869  if (can_direct_free) {
870  av_frame_unref(f->f);
871  return;
872  }
873 
874  fctx = p->parent;
876 
877  if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
878  goto fail;
880  (p->num_released_buffers + 1) *
881  sizeof(*p->released_buffers));
882  if (!tmp)
883  goto fail;
884  p->released_buffers = tmp;
885 
887  av_frame_move_ref(dst, f->f);
888 
890 
891 fail:
893 }
static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
static av_unused void w32thread_init(void)
Definition: w32pthreads.h:397
#define FF_DEBUG_VIS_MB_TYPE
only access through AVOptions from outside libavcodec
Definition: avcodec.h:2786
pthread_cond_t progress_cond
Used by child threads to wait for progress to change.
Definition: pthread_frame.c:55
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1541
AVRational framerate
Definition: avcodec.h:3212
static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
Definition: os2threads.h:106
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:124
#define copy_fields(s, e)
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
Definition: os2threads.h:164
Context used by codec threads and stored in their AVCodecInternal thread_ctx.
Definition: pthread_frame.c:49
int av_cpu_count(void)
Definition: cpu.c:256
AVFrame * requested_frame
AVFrame the codec passed to get_buffer()
Definition: pthread_frame.c:91
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1726
const char * fmt
Definition: avisynth_c.h:632
void(* flush)(AVCodecContext *)
Flush buffers.
Definition: avcodec.h:3481
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVFrame * f
Definition: thread.h:36
memory handling functions
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:357
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2262
int size
Definition: avcodec.h:1468
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:1935
AVPacket * pkt
Current packet as passed into the decoder, to avoid having to pass the packet into every function...
Definition: internal.h:144
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:496
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3475
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2924
pthread_cond_t input_cond
Used to wait for a new packet from the main thread.
Definition: pthread_frame.c:54
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
int profile
profile
Definition: avcodec.h:3028
enum AVPixelFormat * available_formats
Format array for get_format()
Definition: pthread_frame.c:94
AVCodec.
Definition: avcodec.h:3392
static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
Definition: os2threads.h:138
AVPacket avpkt
Input packet (for decoding) or output (for encoding).
Definition: pthread_frame.c:63
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1661
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2843
#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: avcodec.h:881
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int(* init_thread_copy)(AVCodecContext *)
If defined, called on thread contexts when they are created.
Definition: avcodec.h:3439
HMTX pthread_mutex_t
Definition: os2threads.h:49
enum PerThreadContext::@82 state
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
Definition: utils.c:992
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2295
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:141
void * hwaccel_context
Hardware accelerator context.
Definition: avcodec.h:2855
AVOptions.
static attribute_align_arg void * frame_worker_thread(void *arg)
Codec worker thread.
void * thread_ctx
Definition: internal.h:138
Multithreading support functions.
#define THREAD_SAFE_CALLBACKS(avctx)
static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
int requested_flags
flags passed to get_buffer() for requested_frame
Definition: pthread_frame.c:92
int next_decoding
The next context to submit a packet to.
static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
Definition: os2threads.h:146
static void copy(LZOContext *c, int cnt)
Copies bytes from input to output buffer with checking.
Definition: lzo.c:85
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2917
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2269
Context stored in the client AVCodecInternal thread_ctx.
AVCodecContext * avctx
Context used to decode packets passed to this thread.
Definition: pthread_frame.c:61
#define av_log(a,...)
AVCodecContext * owner
Definition: thread.h:37
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:554
int ff_thread_decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt)
Submit a new frame to a decoding thread.
int slice_count
slice count
Definition: avcodec.h:1910
Libavcodec version macros.
int(* close)(AVCodecContext *)
Definition: avcodec.h:3476
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1846
Set when the codec calls get_format().
Definition: pthread_frame.c:76
PerThreadContext * prev_thread
The last thread submit_packet() was called on.
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:480
void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:111
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2973
int capabilities
Codec capabilities.
Definition: avcodec.h:3411
int result
The result of the last codec decode/encode() call.
Definition: pthread_frame.c:67
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
const char * arg
Definition: jacosubdec.c:66
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1627
simple assert() macros that are a bit more flexible than ISO C assert().
int die
Set when threads should exit.
#define fail()
Definition: checkasm.h:80
reference-counted frame API
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2338
common internal API header
pthread_cond_t output_cond
Used by the main thread to wait for frames to finish.
Definition: pthread_frame.c:56
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band...
Definition: avcodec.h:1785
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2965
#define FFMIN(a, b)
Definition: common.h:96
int width
picture width / height.
Definition: avcodec.h:1711
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2882
int priv_data_size
Definition: avcodec.h:3428
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2241
Set when the thread is awaiting a packet.
Definition: pthread_frame.c:70
static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
Definition: os2threads.h:88
static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
Definition: os2threads.h:98
int level
level
Definition: avcodec.h:3117
#define FF_DEBUG_BUFFERS
Definition: avcodec.h:2788
int64_t reordered_opaque
opaque 64bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque
Definition: avcodec.h:2836
int n
Definition: avisynth_c.h:547
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1670
pthread_t thread
Definition: pthread_frame.c:52
#define FF_DEBUG_THREADS
Definition: avcodec.h:2789
#define src
Definition: vp9dsp.c:530
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2954
int got_frame
The output of got_picture_ptr from the last avcodec_decode_video() call.
Definition: pthread_frame.c:66
static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
Update the next thread's AVCodecContext with values set by the user.
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
Definition: utils.c:1056
pthread_mutex_t buffer_mutex
Mutex used to protect get/release_buffer().
Set after the codec has called ff_thread_finish_setup().
Definition: pthread_frame.c:80
AVBufferRef * progress
Definition: thread.h:40
pthread_mutex_t progress_mutex
Mutex used to protect frame progress values and progress_cond.
Definition: pthread_frame.c:59
static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg)
Definition: os2threads.h:74
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: utils.c:720
Libavcodec external API header.
enum AVMediaType codec_type
Definition: avcodec.h:1540
enum AVCodecID codec_id
Definition: avcodec.h:1549
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
int sample_rate
samples per second
Definition: avcodec.h:2287
int debug
debug
Definition: avcodec.h:2763
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1532
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:545
uint8_t * data
The data buffer.
Definition: buffer.h:89
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:894
int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame)
does needed setup of pkt_pts/pos and such for (re)get_buffer();
Definition: utils.c:749
int slice_flags
slice flags
Definition: avcodec.h:2066
int coded_height
Definition: avcodec.h:1726
enum AVPixelFormat(* get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
callback to negotiate the pixelFormat
Definition: avcodec.h:1802
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2255
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2248
enum AVPixelFormat result_format
get_format() result
Definition: pthread_frame.c:95
int delaying
Set for the first N packets, where N is the number of threads.
refcounted data buffer API
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Wrapper around get_format() for frame-multithreaded codecs.
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:2442
attribute_deprecated int dtg_active_format
DTG active format information (additional aspect ratio information only used in DVB MPEG-2 transport ...
Definition: avcodec.h:2029
PerThreadContext * threads
The contexts for each thread.
int allocate_progress
Whether to allocate progress for frame threading.
Definition: internal.h:126
#define MAX_AUTO_THREADS
AVFrame * released_buffers
Array of frames passed to ff_thread_release_buffer().
Definition: pthread_frame.c:87
struct FrameThreadContext * parent
Definition: pthread_frame.c:50
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:474
static int flags
Definition: cpu.c:47
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3418
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
Set when the codec calls get_buffer().
Definition: pthread_frame.c:72
int64_t pkt_dts
DTS copied from the AVPacket that triggered returning this frame.
Definition: frame.h:274
Set before the codec has called ff_thread_finish_setup().
Definition: pthread_frame.c:71
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1447
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
common internal api header.
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
int released_buffers_allocated
Definition: pthread_frame.c:89
void * hwaccel_priv_data
hwaccel-specific private data
Definition: internal.h:162
static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
Update the next thread's AVCodecContext with values from the reference thread's context.
static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
Definition: os2threads.h:127
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2945
int thread_safe_callbacks
Set by the client if its custom get_buffer() callback can be called synchronously from another thread...
Definition: avcodec.h:2983
void * priv_data
Definition: avcodec.h:1574
int(* update_thread_context)(AVCodecContext *dst, const AVCodecContext *src)
Copy necessary context variables from a previous thread context to the current one.
Definition: avcodec.h:3447
void ff_thread_flush(AVCodecContext *avctx)
Wait for decoding threads to finish and reset internal state.
AVFrame * frame
Output frame (for decoding) or input (for encoding).
Definition: pthread_frame.c:65
int ff_thread_can_start_frame(AVCodecContext *avctx)
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
Definition: os2threads.h:156
int channels
number of audio channels
Definition: avcodec.h:2288
static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
Definition: os2threads.h:120
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1582
pthread_mutex_t mutex
Mutex used to protect the contents of the PerThreadContext.
Definition: pthread_frame.c:58
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1634
static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
Waits for all threads to finish.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1466
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:1926
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2318
static void release_delayed_buffers(PerThreadContext *p)
Releases the buffers that this decoding thread was the last user of.
#define av_freep(p)
#define FF_DEBUG_VIS_QP
only access through AVOptions from outside libavcodec
Definition: avcodec.h:2785
static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
Definition: os2threads.h:113
int debug_mv
debug Code outside libavcodec should access this field using AVOptions
Definition: avcodec.h:2800
int next_finished
The next context to return output from.
int(* init)(AVCodecContext *)
Definition: avcodec.h:3460
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:225
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1444
int delay
Codec delay.
Definition: avcodec.h:1694
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int ff_frame_thread_init(AVCodecContext *avctx)
void * opaque
Private data of the user, can be used to carry app specific stuff.
Definition: avcodec.h:1589