2 * This file is part of FFmpeg.
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.
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.
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
21 * Frame multithreading support functions
22 * @see doc/multithreading.txt
32 #include "compat/w32pthreads.h"
34 #include "compat/os2threads.h"
39 #include "pthread_internal.h"
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"
51 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
53 typedef struct PerThreadContext {
54 struct FrameThreadContext *parent;
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.
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.
65 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
67 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
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.
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().
76 STATE_GET_BUFFER, /**<
77 * Set when the codec calls get_buffer().
78 * State is returned to STATE_SETTING_UP afterwards.
80 STATE_GET_FORMAT, /**<
81 * Set when the codec calls get_format().
82 * State is returned to STATE_SETTING_UP afterwards.
84 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
88 * Array of frames passed to ff_thread_release_buffer().
89 * Frames are released after all threads referencing them are finished.
91 AVFrame *released_buffers;
92 int num_released_buffers;
93 int released_buffers_allocated;
95 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
96 int requested_flags; ///< flags passed to get_buffer() for requested_frame
98 const enum AVPixelFormat *available_formats; ///< Format array for get_format()
99 enum AVPixelFormat result_format; ///< get_format() result
103 * Context stored in the client AVCodecInternal thread_ctx.
105 typedef struct FrameThreadContext {
106 PerThreadContext *threads; ///< The contexts for each thread.
107 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
109 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
111 int next_decoding; ///< The next context to submit a packet to.
112 int next_finished; ///< The next context to return output from.
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.
119 int die; ///< Set when threads should exit.
120 } FrameThreadContext;
122 #define THREAD_SAFE_CALLBACKS(avctx) \
123 ((avctx)->thread_safe_callbacks || (!(avctx)->get_buffer && (avctx)->get_buffer2 == avcodec_default_get_buffer2))
126 * Codec worker thread.
128 * Automatically calls ff_thread_finish_setup() if the codec does
129 * not provide an update_thread_context method, or if the codec returns
132 static attribute_align_arg void *frame_worker_thread(void *arg)
134 PerThreadContext *p = arg;
135 FrameThreadContext *fctx = p->parent;
136 AVCodecContext *avctx = p->avctx;
137 const AVCodec *codec = avctx->codec;
139 pthread_mutex_lock(&p->mutex);
141 while (p->state == STATE_INPUT_READY && !fctx->die)
142 pthread_cond_wait(&p->input_cond, &p->mutex);
144 if (fctx->die) break;
146 if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
147 ff_thread_finish_setup(avctx);
149 av_frame_unref(p->frame);
151 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
153 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
154 if (avctx->internal->allocate_progress)
155 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
156 "free the frame on failure. This is a bug, please report it.\n");
157 av_frame_unref(p->frame);
160 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
162 pthread_mutex_lock(&p->progress_mutex);
164 for (i = 0; i < MAX_BUFFERS; i++)
165 if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
166 p->progress[i][0] = INT_MAX;
167 p->progress[i][1] = INT_MAX;
170 p->state = STATE_INPUT_READY;
172 pthread_cond_broadcast(&p->progress_cond);
173 pthread_cond_signal(&p->output_cond);
174 pthread_mutex_unlock(&p->progress_mutex);
176 pthread_mutex_unlock(&p->mutex);
182 * Update the next thread's AVCodecContext with values from the reference thread's context.
184 * @param dst The destination context.
185 * @param src The source context.
186 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
188 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
193 dst->time_base = src->time_base;
194 dst->width = src->width;
195 dst->height = src->height;
196 dst->pix_fmt = src->pix_fmt;
198 dst->coded_width = src->coded_width;
199 dst->coded_height = src->coded_height;
201 dst->has_b_frames = src->has_b_frames;
202 dst->idct_algo = src->idct_algo;
204 dst->bits_per_coded_sample = src->bits_per_coded_sample;
205 dst->sample_aspect_ratio = src->sample_aspect_ratio;
206 dst->dtg_active_format = src->dtg_active_format;
208 dst->profile = src->profile;
209 dst->level = src->level;
211 dst->bits_per_raw_sample = src->bits_per_raw_sample;
212 dst->ticks_per_frame = src->ticks_per_frame;
213 dst->color_primaries = src->color_primaries;
215 dst->color_trc = src->color_trc;
216 dst->colorspace = src->colorspace;
217 dst->color_range = src->color_range;
218 dst->chroma_sample_location = src->chroma_sample_location;
220 dst->hwaccel = src->hwaccel;
221 dst->hwaccel_context = src->hwaccel_context;
223 dst->channels = src->channels;
224 dst->sample_rate = src->sample_rate;
225 dst->sample_fmt = src->sample_fmt;
226 dst->channel_layout = src->channel_layout;
227 dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
231 dst->delay = src->thread_count - 1;
232 dst->coded_frame = src->coded_frame;
234 if (dst->codec->update_thread_context)
235 err = dst->codec->update_thread_context(dst, src);
242 * Update the next thread's AVCodecContext with values set by the user.
244 * @param dst The destination context.
245 * @param src The source context.
246 * @return 0 on success, negative error code on failure
248 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
250 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
251 dst->flags = src->flags;
253 dst->draw_horiz_band= src->draw_horiz_band;
254 dst->get_buffer2 = src->get_buffer2;
255 #if FF_API_GET_BUFFER
256 FF_DISABLE_DEPRECATION_WARNINGS
257 dst->get_buffer = src->get_buffer;
258 dst->release_buffer = src->release_buffer;
259 FF_ENABLE_DEPRECATION_WARNINGS
262 dst->opaque = src->opaque;
263 dst->debug = src->debug;
264 dst->debug_mv = src->debug_mv;
266 dst->slice_flags = src->slice_flags;
267 dst->flags2 = src->flags2;
269 copy_fields(skip_loop_filter, subtitle_header);
271 dst->frame_number = src->frame_number;
272 dst->reordered_opaque = src->reordered_opaque;
273 dst->thread_safe_callbacks = src->thread_safe_callbacks;
275 if (src->slice_count && src->slice_offset) {
276 if (dst->slice_count < src->slice_count) {
277 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
278 sizeof(*dst->slice_offset));
280 av_free(dst->slice_offset);
281 return AVERROR(ENOMEM);
283 dst->slice_offset = tmp;
285 memcpy(dst->slice_offset, src->slice_offset,
286 src->slice_count * sizeof(*dst->slice_offset));
288 dst->slice_count = src->slice_count;
293 /// Releases the buffers that this decoding thread was the last user of.
294 static void release_delayed_buffers(PerThreadContext *p)
296 FrameThreadContext *fctx = p->parent;
298 while (p->num_released_buffers > 0) {
301 pthread_mutex_lock(&fctx->buffer_mutex);
303 // fix extended data in case the caller screwed it up
304 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
305 p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
306 f = &p->released_buffers[--p->num_released_buffers];
307 f->extended_data = f->data;
310 pthread_mutex_unlock(&fctx->buffer_mutex);
314 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
316 FrameThreadContext *fctx = p->parent;
317 PerThreadContext *prev_thread = fctx->prev_thread;
318 const AVCodec *codec = p->avctx->codec;
320 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
322 pthread_mutex_lock(&p->mutex);
324 release_delayed_buffers(p);
328 if (prev_thread->state == STATE_SETTING_UP) {
329 pthread_mutex_lock(&prev_thread->progress_mutex);
330 while (prev_thread->state == STATE_SETTING_UP)
331 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
332 pthread_mutex_unlock(&prev_thread->progress_mutex);
335 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
337 pthread_mutex_unlock(&p->mutex);
342 av_packet_unref(&p->avpkt);
343 av_packet_ref(&p->avpkt, avpkt);
345 p->state = STATE_SETTING_UP;
346 pthread_cond_signal(&p->input_cond);
347 pthread_mutex_unlock(&p->mutex);
350 * If the client doesn't have a thread-safe get_buffer(),
351 * then decoding threads call back to the main thread,
352 * and it calls back to the client here.
355 FF_DISABLE_DEPRECATION_WARNINGS
356 if (!p->avctx->thread_safe_callbacks && (
357 p->avctx->get_format != avcodec_default_get_format ||
358 #if FF_API_GET_BUFFER
359 p->avctx->get_buffer ||
361 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
362 FF_ENABLE_DEPRECATION_WARNINGS
363 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
365 pthread_mutex_lock(&p->progress_mutex);
366 while (p->state == STATE_SETTING_UP)
367 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
370 case STATE_GET_BUFFER:
371 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
373 case STATE_GET_FORMAT:
374 p->result_format = p->avctx->get_format(p->avctx, p->available_formats);
381 p->state = STATE_SETTING_UP;
382 pthread_cond_signal(&p->progress_cond);
384 pthread_mutex_unlock(&p->progress_mutex);
388 fctx->prev_thread = p;
389 fctx->next_decoding++;
394 int ff_thread_decode_frame(AVCodecContext *avctx,
395 AVFrame *picture, int *got_picture_ptr,
398 FrameThreadContext *fctx = avctx->internal->thread_ctx;
399 int finished = fctx->next_finished;
404 * Submit a packet to the next decoding thread.
407 p = &fctx->threads[fctx->next_decoding];
408 err = update_context_from_user(p->avctx, avctx);
410 err = submit_packet(p, avpkt);
414 * If we're still receiving the initial packets, don't return a frame.
417 if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
420 if (fctx->delaying) {
427 * Return the next available frame from the oldest thread.
428 * If we're at the end of the stream, then we have to skip threads that
429 * didn't output a frame, because we don't want to accidentally signal
430 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
434 p = &fctx->threads[finished++];
436 if (p->state != STATE_INPUT_READY) {
437 pthread_mutex_lock(&p->progress_mutex);
438 while (p->state != STATE_INPUT_READY)
439 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
440 pthread_mutex_unlock(&p->progress_mutex);
443 av_frame_move_ref(picture, p->frame);
444 *got_picture_ptr = p->got_frame;
445 picture->pkt_dts = p->avpkt.dts;
448 * A later call with avkpt->size == 0 may loop over all threads,
449 * including this one, searching for a frame to return before being
450 * stopped by the "finished != fctx->next_finished" condition.
451 * Make sure we don't mistakenly return the same frame again.
455 if (finished >= avctx->thread_count) finished = 0;
456 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
458 update_context_from_thread(avctx, p->avctx, 1);
460 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
462 fctx->next_finished = finished;
464 /* return the size of the consumed packet if no error occurred */
465 return (p->result >= 0) ? avpkt->size : p->result;
468 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
471 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
473 if (!progress || progress[field] >= n) return;
475 p = f->owner->internal->thread_ctx;
477 if (f->owner->debug&FF_DEBUG_THREADS)
478 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
480 pthread_mutex_lock(&p->progress_mutex);
482 pthread_cond_broadcast(&p->progress_cond);
483 pthread_mutex_unlock(&p->progress_mutex);
486 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
489 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
491 if (!progress || progress[field] >= n) return;
493 p = f->owner->internal->thread_ctx;
495 if (f->owner->debug&FF_DEBUG_THREADS)
496 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
498 pthread_mutex_lock(&p->progress_mutex);
499 while (progress[field] < n)
500 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
501 pthread_mutex_unlock(&p->progress_mutex);
504 void ff_thread_finish_setup(AVCodecContext *avctx) {
505 PerThreadContext *p = avctx->internal->thread_ctx;
507 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
509 if(p->state == STATE_SETUP_FINISHED){
510 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
513 pthread_mutex_lock(&p->progress_mutex);
514 p->state = STATE_SETUP_FINISHED;
515 pthread_cond_broadcast(&p->progress_cond);
516 pthread_mutex_unlock(&p->progress_mutex);
519 /// Waits for all threads to finish.
520 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
524 for (i = 0; i < thread_count; i++) {
525 PerThreadContext *p = &fctx->threads[i];
527 if (p->state != STATE_INPUT_READY) {
528 pthread_mutex_lock(&p->progress_mutex);
529 while (p->state != STATE_INPUT_READY)
530 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
531 pthread_mutex_unlock(&p->progress_mutex);
537 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
539 FrameThreadContext *fctx = avctx->internal->thread_ctx;
540 const AVCodec *codec = avctx->codec;
543 park_frame_worker_threads(fctx, thread_count);
545 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
546 if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
547 av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
548 fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
549 fctx->threads->avctx->internal->is_copy = 1;
554 for (i = 0; i < thread_count; i++) {
555 PerThreadContext *p = &fctx->threads[i];
557 pthread_mutex_lock(&p->mutex);
558 pthread_cond_signal(&p->input_cond);
559 pthread_mutex_unlock(&p->mutex);
562 pthread_join(p->thread, NULL);
566 codec->close(p->avctx);
570 release_delayed_buffers(p);
571 av_frame_free(&p->frame);
574 for (i = 0; i < thread_count; i++) {
575 PerThreadContext *p = &fctx->threads[i];
577 pthread_mutex_destroy(&p->mutex);
578 pthread_mutex_destroy(&p->progress_mutex);
579 pthread_cond_destroy(&p->input_cond);
580 pthread_cond_destroy(&p->progress_cond);
581 pthread_cond_destroy(&p->output_cond);
582 av_packet_unref(&p->avpkt);
583 av_freep(&p->released_buffers);
586 av_freep(&p->avctx->priv_data);
587 av_freep(&p->avctx->slice_offset);
590 av_freep(&p->avctx->internal);
594 av_freep(&fctx->threads);
595 pthread_mutex_destroy(&fctx->buffer_mutex);
596 av_freep(&avctx->internal->thread_ctx);
599 int ff_frame_thread_init(AVCodecContext *avctx)
601 int thread_count = avctx->thread_count;
602 const AVCodec *codec = avctx->codec;
603 AVCodecContext *src = avctx;
604 FrameThreadContext *fctx;
612 int nb_cpus = av_cpu_count();
613 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
615 // use number of cores + 1 as thread count if there is more than one
617 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
619 thread_count = avctx->thread_count = 1;
622 if (thread_count <= 1) {
623 avctx->active_thread_type = 0;
627 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
629 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
630 pthread_mutex_init(&fctx->buffer_mutex, NULL);
633 for (i = 0; i < thread_count; i++) {
634 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
635 PerThreadContext *p = &fctx->threads[i];
637 pthread_mutex_init(&p->mutex, NULL);
638 pthread_mutex_init(&p->progress_mutex, NULL);
639 pthread_cond_init(&p->input_cond, NULL);
640 pthread_cond_init(&p->progress_cond, NULL);
641 pthread_cond_init(&p->output_cond, NULL);
643 p->frame = av_frame_alloc();
645 err = AVERROR(ENOMEM);
654 err = AVERROR(ENOMEM);
660 copy->internal = av_malloc(sizeof(AVCodecInternal));
661 if (!copy->internal) {
662 err = AVERROR(ENOMEM);
665 *copy->internal = *src->internal;
666 copy->internal->thread_ctx = p;
667 copy->internal->pkt = &p->avpkt;
673 err = codec->init(copy);
675 update_context_from_thread(avctx, copy, 1);
677 copy->priv_data = av_malloc(codec->priv_data_size);
678 if (!copy->priv_data) {
679 err = AVERROR(ENOMEM);
682 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
683 copy->internal->is_copy = 1;
685 if (codec->init_thread_copy)
686 err = codec->init_thread_copy(copy);
691 err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
692 p->thread_init= !err;
700 ff_frame_thread_free(avctx, i+1);
705 void ff_thread_flush(AVCodecContext *avctx)
708 FrameThreadContext *fctx = avctx->internal->thread_ctx;
712 park_frame_worker_threads(fctx, avctx->thread_count);
713 if (fctx->prev_thread) {
714 if (fctx->prev_thread != &fctx->threads[0])
715 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
718 fctx->next_decoding = fctx->next_finished = 0;
720 fctx->prev_thread = NULL;
721 for (i = 0; i < avctx->thread_count; i++) {
722 PerThreadContext *p = &fctx->threads[i];
723 // Make sure decode flush calls with size=0 won't return old frames
725 av_frame_unref(p->frame);
727 release_delayed_buffers(p);
729 if (avctx->codec->flush)
730 avctx->codec->flush(p->avctx);
734 int ff_thread_can_start_frame(AVCodecContext *avctx)
736 PerThreadContext *p = avctx->internal->thread_ctx;
737 if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
738 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
744 static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
746 PerThreadContext *p = avctx->internal->thread_ctx;
751 ff_init_buffer_info(avctx, f->f);
753 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
754 return ff_get_buffer(avctx, f->f, flags);
756 if (p->state != STATE_SETTING_UP &&
757 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
758 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
762 if (avctx->internal->allocate_progress) {
764 f->progress = av_buffer_alloc(2 * sizeof(int));
766 return AVERROR(ENOMEM);
768 progress = (int*)f->progress->data;
770 progress[0] = progress[1] = -1;
773 pthread_mutex_lock(&p->parent->buffer_mutex);
774 FF_DISABLE_DEPRECATION_WARNINGS
775 if (avctx->thread_safe_callbacks || (
776 #if FF_API_GET_BUFFER
777 !avctx->get_buffer &&
779 avctx->get_buffer2 == avcodec_default_get_buffer2)) {
780 FF_ENABLE_DEPRECATION_WARNINGS
781 err = ff_get_buffer(avctx, f->f, flags);
783 pthread_mutex_lock(&p->progress_mutex);
784 p->requested_frame = f->f;
785 p->requested_flags = flags;
786 p->state = STATE_GET_BUFFER;
787 pthread_cond_broadcast(&p->progress_cond);
789 while (p->state != STATE_SETTING_UP)
790 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
794 pthread_mutex_unlock(&p->progress_mutex);
797 if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
798 ff_thread_finish_setup(avctx);
801 av_buffer_unref(&f->progress);
803 pthread_mutex_unlock(&p->parent->buffer_mutex);
808 enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
810 enum AVPixelFormat res;
811 PerThreadContext *p = avctx->internal->thread_ctx;
812 if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
813 avctx->get_format == avcodec_default_get_format)
814 return ff_get_format(avctx, fmt);
815 if (p->state != STATE_SETTING_UP) {
816 av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
819 pthread_mutex_lock(&p->progress_mutex);
820 p->available_formats = fmt;
821 p->state = STATE_GET_FORMAT;
822 pthread_cond_broadcast(&p->progress_cond);
824 while (p->state != STATE_SETTING_UP)
825 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
827 res = p->result_format;
829 pthread_mutex_unlock(&p->progress_mutex);
834 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
836 int ret = thread_get_buffer_internal(avctx, f, flags);
838 av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
842 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
844 PerThreadContext *p = avctx->internal->thread_ctx;
845 FrameThreadContext *fctx;
847 FF_DISABLE_DEPRECATION_WARNINGS
848 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
849 avctx->thread_safe_callbacks ||
851 #if FF_API_GET_BUFFER
852 !avctx->get_buffer &&
854 avctx->get_buffer2 == avcodec_default_get_buffer2);
855 FF_ENABLE_DEPRECATION_WARNINGS
857 if (!f->f || !f->f->buf[0])
860 if (avctx->debug & FF_DEBUG_BUFFERS)
861 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
863 av_buffer_unref(&f->progress);
866 if (can_direct_free) {
867 av_frame_unref(f->f);
872 pthread_mutex_lock(&fctx->buffer_mutex);
874 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
876 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
877 (p->num_released_buffers + 1) *
878 sizeof(*p->released_buffers));
881 p->released_buffers = tmp;
883 dst = &p->released_buffers[p->num_released_buffers];
884 av_frame_move_ref(dst, f->f);
886 p->num_released_buffers++;
889 pthread_mutex_unlock(&fctx->buffer_mutex);