2 * This file is part of Libav.
4 * Libav 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 * Libav 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 Libav; 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
27 #include <stdatomic.h>
33 #include "compat/w32pthreads.h"
39 #include "pthread_internal.h"
43 #include "libavutil/avassert.h"
44 #include "libavutil/buffer.h"
45 #include "libavutil/common.h"
46 #include "libavutil/cpu.h"
47 #include "libavutil/frame.h"
48 #include "libavutil/internal.h"
49 #include "libavutil/log.h"
50 #include "libavutil/mem.h"
53 ///< Set when the thread is awaiting a packet.
55 ///< Set before the codec has called ff_thread_finish_setup().
58 * Set when the codec calls get_buffer().
59 * State is returned to STATE_SETTING_UP afterwards.
62 ///< Set after the codec has called ff_thread_finish_setup().
67 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
69 typedef struct PerThreadContext {
70 struct FrameThreadContext *parent;
74 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
75 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
76 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
78 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
79 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
81 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
83 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
85 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
86 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
87 int result; ///< The result of the last codec decode/encode() call.
92 * Array of frames passed to ff_thread_release_buffer().
93 * Frames are released after all threads referencing them are finished.
95 AVFrame *released_buffers;
96 int num_released_buffers;
97 int released_buffers_allocated;
99 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
100 int requested_flags; ///< flags passed to get_buffer() for requested_frame
102 int die; ///< Set when the thread should exit.
104 int hwaccel_serializing;
105 int async_serializing;
109 * Context stored in the client AVCodecInternal thread_ctx.
111 typedef struct FrameThreadContext {
112 PerThreadContext *threads; ///< The contexts for each thread.
113 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
115 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
117 * This lock is used for ensuring threads run in serial when hwaccel
120 pthread_mutex_t hwaccel_mutex;
121 pthread_mutex_t async_mutex;
123 int next_decoding; ///< The next context to submit a packet to.
124 int next_finished; ///< The next context to return output from.
127 * Set for the first N packets, where N is the number of threads.
128 * While it is set, ff_thread_en/decode_frame won't return any results.
130 } FrameThreadContext;
133 * Codec worker thread.
135 * Automatically calls ff_thread_finish_setup() if the codec does
136 * not provide an update_thread_context method, or if the codec returns
139 static attribute_align_arg void *frame_worker_thread(void *arg)
141 PerThreadContext *p = arg;
142 AVCodecContext *avctx = p->avctx;
143 const AVCodec *codec = avctx->codec;
146 if (atomic_load(&p->state) == STATE_INPUT_READY) {
147 pthread_mutex_lock(&p->mutex);
148 while (atomic_load(&p->state) == STATE_INPUT_READY) {
150 pthread_mutex_unlock(&p->mutex);
153 pthread_cond_wait(&p->input_cond, &p->mutex);
155 pthread_mutex_unlock(&p->mutex);
158 if (!codec->update_thread_context && avctx->thread_safe_callbacks)
159 ff_thread_finish_setup(avctx);
161 pthread_mutex_lock(&p->mutex);
163 /* If a decoder supports hwaccel, then it must call ff_get_format().
164 * Since that call must happen before ff_thread_finish_setup(), the
165 * decoder is required to implement update_thread_context() and call
166 * ff_thread_finish_setup() manually. Therefore the above
167 * ff_thread_finish_setup() call did not happen and hwaccel_serializing
168 * cannot be true here. */
169 av_assert0(!p->hwaccel_serializing);
171 /* if the previous thread uses hwaccel then we take the lock to ensure
172 * the threads don't run concurrently */
173 if (avctx->hwaccel) {
174 pthread_mutex_lock(&p->parent->hwaccel_mutex);
175 p->hwaccel_serializing = 1;
178 av_frame_unref(p->frame);
180 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
182 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
183 if (avctx->internal->allocate_progress)
184 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
185 "free the frame on failure. This is a bug, please report it.\n");
186 av_frame_unref(p->frame);
189 if (atomic_load(&p->state) == STATE_SETTING_UP)
190 ff_thread_finish_setup(avctx);
192 if (p->hwaccel_serializing) {
193 p->hwaccel_serializing = 0;
194 pthread_mutex_unlock(&p->parent->hwaccel_mutex);
197 if (p->async_serializing) {
198 p->async_serializing = 0;
199 pthread_mutex_unlock(&p->parent->async_mutex);
202 atomic_store(&p->state, STATE_INPUT_READY);
204 pthread_mutex_lock(&p->progress_mutex);
205 pthread_cond_signal(&p->output_cond);
206 pthread_mutex_unlock(&p->progress_mutex);
208 pthread_mutex_unlock(&p->mutex);
216 * Update the next thread's AVCodecContext with values from the reference thread's context.
218 * @param dst The destination context.
219 * @param src The source context.
220 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
222 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
227 dst->time_base = src->time_base;
228 dst->framerate = src->framerate;
229 dst->width = src->width;
230 dst->height = src->height;
231 dst->pix_fmt = src->pix_fmt;
232 dst->sw_pix_fmt = src->sw_pix_fmt;
234 dst->coded_width = src->coded_width;
235 dst->coded_height = src->coded_height;
237 dst->has_b_frames = src->has_b_frames;
238 dst->idct_algo = src->idct_algo;
240 dst->bits_per_coded_sample = src->bits_per_coded_sample;
241 dst->sample_aspect_ratio = src->sample_aspect_ratio;
243 dst->profile = src->profile;
244 dst->level = src->level;
246 dst->bits_per_raw_sample = src->bits_per_raw_sample;
247 dst->ticks_per_frame = src->ticks_per_frame;
248 dst->color_primaries = src->color_primaries;
250 dst->color_trc = src->color_trc;
251 dst->colorspace = src->colorspace;
252 dst->color_range = src->color_range;
253 dst->chroma_sample_location = src->chroma_sample_location;
255 dst->hwaccel = src->hwaccel;
256 dst->hwaccel_context = src->hwaccel_context;
257 dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
259 if (!!dst->hw_frames_ctx != !!src->hw_frames_ctx ||
260 (dst->hw_frames_ctx && dst->hw_frames_ctx->data != src->hw_frames_ctx->data)) {
261 av_buffer_unref(&dst->hw_frames_ctx);
263 if (src->hw_frames_ctx) {
264 dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
265 if (!dst->hw_frames_ctx)
266 return AVERROR(ENOMEM);
270 dst->hwaccel_flags = src->hwaccel_flags;
274 #if FF_API_CODED_FRAME
275 FF_DISABLE_DEPRECATION_WARNINGS
276 dst->coded_frame = src->coded_frame;
277 FF_ENABLE_DEPRECATION_WARNINGS
280 if (dst->codec->update_thread_context)
281 err = dst->codec->update_thread_context(dst, src);
288 * Update the next thread's AVCodecContext with values set by the user.
290 * @param dst The destination context.
291 * @param src The source context.
292 * @return 0 on success, negative error code on failure
294 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
296 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
297 dst->flags = src->flags;
299 dst->draw_horiz_band= src->draw_horiz_band;
300 dst->get_buffer2 = src->get_buffer2;
302 dst->opaque = src->opaque;
303 dst->debug = src->debug;
305 dst->slice_flags = src->slice_flags;
306 dst->flags2 = src->flags2;
308 copy_fields(skip_loop_filter, subtitle_header);
310 dst->frame_number = src->frame_number;
311 dst->reordered_opaque = src->reordered_opaque;
313 if (src->slice_count && src->slice_offset) {
314 if (dst->slice_count < src->slice_count) {
315 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
316 sizeof(*dst->slice_offset));
318 av_free(dst->slice_offset);
319 return AVERROR(ENOMEM);
321 dst->slice_offset = tmp;
323 memcpy(dst->slice_offset, src->slice_offset,
324 src->slice_count * sizeof(*dst->slice_offset));
326 dst->slice_count = src->slice_count;
331 /// Releases the buffers that this decoding thread was the last user of.
332 static void release_delayed_buffers(PerThreadContext *p)
334 FrameThreadContext *fctx = p->parent;
336 while (p->num_released_buffers > 0) {
339 pthread_mutex_lock(&fctx->buffer_mutex);
341 // fix extended data in case the caller screwed it up
342 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO);
343 f = &p->released_buffers[--p->num_released_buffers];
344 f->extended_data = f->data;
347 pthread_mutex_unlock(&fctx->buffer_mutex);
351 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
353 FrameThreadContext *fctx = p->parent;
354 PerThreadContext *prev_thread = fctx->prev_thread;
355 const AVCodec *codec = p->avctx->codec;
357 if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY))
360 pthread_mutex_lock(&p->mutex);
362 release_delayed_buffers(p);
366 if (atomic_load(&prev_thread->state) == STATE_SETTING_UP) {
367 pthread_mutex_lock(&prev_thread->progress_mutex);
368 while (atomic_load(&prev_thread->state) == STATE_SETTING_UP)
369 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
370 pthread_mutex_unlock(&prev_thread->progress_mutex);
373 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
375 pthread_mutex_unlock(&p->mutex);
380 av_packet_unref(&p->avpkt);
381 av_packet_ref(&p->avpkt, avpkt);
383 atomic_store(&p->state, STATE_SETTING_UP);
384 pthread_cond_signal(&p->input_cond);
385 pthread_mutex_unlock(&p->mutex);
388 * If the client doesn't have a thread-safe get_buffer(),
389 * then decoding threads call back to the main thread,
390 * and it calls back to the client here.
393 if (!p->avctx->thread_safe_callbacks &&
394 p->avctx->get_buffer2 != avcodec_default_get_buffer2) {
395 while (atomic_load(&p->state) != STATE_SETUP_FINISHED &&
396 atomic_load(&p->state) != STATE_INPUT_READY) {
397 pthread_mutex_lock(&p->progress_mutex);
398 while (atomic_load(&p->state) == STATE_SETTING_UP)
399 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
401 if (atomic_load_explicit(&p->state, memory_order_acquire) == STATE_GET_BUFFER) {
402 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
403 atomic_store(&p->state, STATE_SETTING_UP);
404 pthread_cond_signal(&p->progress_cond);
406 pthread_mutex_unlock(&p->progress_mutex);
410 fctx->prev_thread = p;
411 fctx->next_decoding++;
416 int ff_thread_decode_frame(AVCodecContext *avctx,
417 AVFrame *picture, int *got_picture_ptr,
420 FrameThreadContext *fctx = avctx->internal->thread_ctx;
421 int finished = fctx->next_finished;
425 /* release the async lock, permitting blocked hwaccel threads to
426 * go forward while we are in this function */
427 pthread_mutex_unlock(&fctx->async_mutex);
430 * Submit a packet to the next decoding thread.
433 p = &fctx->threads[fctx->next_decoding];
434 err = update_context_from_user(p->avctx, avctx);
437 err = submit_packet(p, avpkt);
442 * If we're still receiving the initial packets, don't return a frame.
445 if (fctx->delaying) {
446 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
456 * Return the next available frame from the oldest thread.
457 * If we're at the end of the stream, then we have to skip threads that
458 * didn't output a frame, because we don't want to accidentally signal
459 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
463 p = &fctx->threads[finished++];
465 if (atomic_load(&p->state) != STATE_INPUT_READY) {
466 pthread_mutex_lock(&p->progress_mutex);
467 while (atomic_load_explicit(&p->state, memory_order_relaxed) != STATE_INPUT_READY)
468 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
469 pthread_mutex_unlock(&p->progress_mutex);
472 av_frame_move_ref(picture, p->frame);
473 *got_picture_ptr = p->got_frame;
474 picture->pkt_dts = p->avpkt.dts;
477 * A later call with avkpt->size == 0 may loop over all threads,
478 * including this one, searching for a frame to return before being
479 * stopped by the "finished != fctx->next_finished" condition.
480 * Make sure we don't mistakenly return the same frame again.
484 if (finished >= avctx->thread_count) finished = 0;
485 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
487 update_context_from_thread(avctx, p->avctx, 1);
489 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
491 fctx->next_finished = finished;
493 /* return the size of the consumed packet if no error occurred */
494 ret = (p->result >= 0) ? avpkt->size : p->result;
496 pthread_mutex_lock(&fctx->async_mutex);
502 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
505 atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
508 atomic_load_explicit(&progress[field], memory_order_relaxed) >= n)
511 p = f->owner->internal->thread_ctx;
513 if (f->owner->debug&FF_DEBUG_THREADS)
514 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
516 pthread_mutex_lock(&p->progress_mutex);
518 atomic_store_explicit(&progress[field], n, memory_order_release);
520 pthread_cond_broadcast(&p->progress_cond);
521 pthread_mutex_unlock(&p->progress_mutex);
524 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
527 atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
530 atomic_load_explicit(&progress[field], memory_order_acquire) >= n)
533 p = f->owner->internal->thread_ctx;
535 if (f->owner->debug&FF_DEBUG_THREADS)
536 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
538 pthread_mutex_lock(&p->progress_mutex);
539 while (atomic_load_explicit(&progress[field], memory_order_relaxed) < n)
540 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
541 pthread_mutex_unlock(&p->progress_mutex);
544 void ff_thread_finish_setup(AVCodecContext *avctx) {
545 PerThreadContext *p = avctx->internal->thread_ctx;
547 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
549 if (avctx->hwaccel && !p->hwaccel_serializing) {
550 pthread_mutex_lock(&p->parent->hwaccel_mutex);
551 p->hwaccel_serializing = 1;
554 /* this assumes that no hwaccel calls happen before ff_thread_finish_setup() */
555 if (avctx->hwaccel &&
556 !(avctx->hwaccel->caps_internal & HWACCEL_CAP_ASYNC_SAFE)) {
557 p->async_serializing = 1;
558 pthread_mutex_lock(&p->parent->async_mutex);
561 pthread_mutex_lock(&p->progress_mutex);
563 atomic_store(&p->state, STATE_SETUP_FINISHED);
565 pthread_cond_broadcast(&p->progress_cond);
566 pthread_mutex_unlock(&p->progress_mutex);
569 /// Waits for all threads to finish.
570 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
574 pthread_mutex_unlock(&fctx->async_mutex);
576 for (i = 0; i < thread_count; i++) {
577 PerThreadContext *p = &fctx->threads[i];
579 if (atomic_load(&p->state) != STATE_INPUT_READY) {
580 pthread_mutex_lock(&p->progress_mutex);
581 while (atomic_load(&p->state) != STATE_INPUT_READY)
582 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
583 pthread_mutex_unlock(&p->progress_mutex);
587 pthread_mutex_lock(&fctx->async_mutex);
590 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
592 FrameThreadContext *fctx = avctx->internal->thread_ctx;
593 const AVCodec *codec = avctx->codec;
596 park_frame_worker_threads(fctx, thread_count);
598 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
599 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
601 for (i = 0; i < thread_count; i++) {
602 PerThreadContext *p = &fctx->threads[i];
604 pthread_mutex_lock(&p->mutex);
606 pthread_cond_signal(&p->input_cond);
607 pthread_mutex_unlock(&p->mutex);
610 pthread_join(p->thread, NULL);
613 codec->close(p->avctx);
617 release_delayed_buffers(p);
618 av_frame_free(&p->frame);
621 for (i = 0; i < thread_count; i++) {
622 PerThreadContext *p = &fctx->threads[i];
624 pthread_mutex_destroy(&p->mutex);
625 pthread_mutex_destroy(&p->progress_mutex);
626 pthread_cond_destroy(&p->input_cond);
627 pthread_cond_destroy(&p->progress_cond);
628 pthread_cond_destroy(&p->output_cond);
629 av_packet_unref(&p->avpkt);
630 av_freep(&p->released_buffers);
633 av_freep(&p->avctx->priv_data);
634 av_freep(&p->avctx->slice_offset);
637 av_buffer_unref(&p->avctx->hw_frames_ctx);
639 av_freep(&p->avctx->internal);
643 av_freep(&fctx->threads);
644 pthread_mutex_destroy(&fctx->buffer_mutex);
645 pthread_mutex_destroy(&fctx->hwaccel_mutex);
647 pthread_mutex_unlock(&fctx->async_mutex);
648 pthread_mutex_destroy(&fctx->async_mutex);
650 av_freep(&avctx->internal->thread_ctx);
653 int ff_frame_thread_init(AVCodecContext *avctx)
655 int thread_count = avctx->thread_count;
656 const AVCodec *codec = avctx->codec;
657 AVCodecContext *src = avctx;
658 FrameThreadContext *fctx;
666 int nb_cpus = av_cpu_count();
667 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
668 // use number of cores + 1 as thread count if there is more than one
670 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
672 thread_count = avctx->thread_count = 1;
675 if (thread_count <= 1) {
676 avctx->active_thread_type = 0;
680 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
682 return AVERROR(ENOMEM);
684 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
685 if (!fctx->threads) {
686 av_freep(&avctx->internal->thread_ctx);
687 return AVERROR(ENOMEM);
690 pthread_mutex_init(&fctx->buffer_mutex, NULL);
691 pthread_mutex_init(&fctx->hwaccel_mutex, NULL);
693 pthread_mutex_init(&fctx->async_mutex, NULL);
694 pthread_mutex_lock(&fctx->async_mutex);
698 for (i = 0; i < thread_count; i++) {
699 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
700 PerThreadContext *p = &fctx->threads[i];
702 pthread_mutex_init(&p->mutex, NULL);
703 pthread_mutex_init(&p->progress_mutex, NULL);
704 pthread_cond_init(&p->input_cond, NULL);
705 pthread_cond_init(&p->progress_cond, NULL);
706 pthread_cond_init(&p->output_cond, NULL);
708 p->frame = av_frame_alloc();
711 err = AVERROR(ENOMEM);
719 err = AVERROR(ENOMEM);
725 copy->internal = av_malloc(sizeof(AVCodecInternal));
726 if (!copy->internal) {
727 err = AVERROR(ENOMEM);
730 *copy->internal = *src->internal;
731 copy->internal->thread_ctx = p;
732 copy->internal->last_pkt_props = &p->avpkt;
738 err = codec->init(copy);
740 update_context_from_thread(avctx, copy, 1);
742 copy->priv_data = av_malloc(codec->priv_data_size);
743 if (!copy->priv_data) {
744 err = AVERROR(ENOMEM);
747 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
748 copy->internal->is_copy = 1;
750 if (codec->init_thread_copy)
751 err = codec->init_thread_copy(copy);
756 if (!pthread_create(&p->thread, NULL, frame_worker_thread, p))
763 ff_frame_thread_free(avctx, i+1);
768 void ff_thread_flush(AVCodecContext *avctx)
771 FrameThreadContext *fctx = avctx->internal->thread_ctx;
775 park_frame_worker_threads(fctx, avctx->thread_count);
776 if (fctx->prev_thread) {
777 if (fctx->prev_thread != &fctx->threads[0])
778 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
781 fctx->next_decoding = fctx->next_finished = 0;
783 fctx->prev_thread = NULL;
784 for (i = 0; i < avctx->thread_count; i++) {
785 PerThreadContext *p = &fctx->threads[i];
786 // Make sure decode flush calls with size=0 won't return old frames
788 av_frame_unref(p->frame);
790 release_delayed_buffers(p);
792 if (avctx->codec->flush)
793 avctx->codec->flush(p->avctx);
797 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
799 PerThreadContext *p = avctx->internal->thread_ctx;
804 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
805 return ff_get_buffer(avctx, f->f, flags);
807 if (atomic_load(&p->state) != STATE_SETTING_UP &&
808 (avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) {
809 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
813 if (avctx->internal->allocate_progress) {
814 atomic_int *progress;
815 f->progress = av_buffer_alloc(2 * sizeof(*progress));
817 return AVERROR(ENOMEM);
819 progress = (atomic_int*)f->progress->data;
821 atomic_init(&progress[0], -1);
822 atomic_init(&progress[1], -1);
825 pthread_mutex_lock(&p->parent->buffer_mutex);
826 if (avctx->thread_safe_callbacks ||
827 avctx->get_buffer2 == avcodec_default_get_buffer2) {
828 err = ff_get_buffer(avctx, f->f, flags);
830 p->requested_frame = f->f;
831 p->requested_flags = flags;
832 atomic_store_explicit(&p->state, STATE_GET_BUFFER, memory_order_release);
833 pthread_mutex_lock(&p->progress_mutex);
834 pthread_cond_signal(&p->progress_cond);
836 while (atomic_load(&p->state) != STATE_SETTING_UP)
837 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
841 pthread_mutex_unlock(&p->progress_mutex);
844 if (!avctx->thread_safe_callbacks && !avctx->codec->update_thread_context)
845 ff_thread_finish_setup(avctx);
848 av_buffer_unref(&f->progress);
850 pthread_mutex_unlock(&p->parent->buffer_mutex);
855 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
857 PerThreadContext *p = avctx->internal->thread_ctx;
858 FrameThreadContext *fctx;
860 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
861 avctx->thread_safe_callbacks ||
862 avctx->get_buffer2 == avcodec_default_get_buffer2;
864 if (!f->f || !f->f->buf[0])
867 if (avctx->debug & FF_DEBUG_BUFFERS)
868 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
870 av_buffer_unref(&f->progress);
873 if (can_direct_free) {
874 av_frame_unref(f->f);
879 pthread_mutex_lock(&fctx->buffer_mutex);
881 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
883 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
884 (p->num_released_buffers + 1) *
885 sizeof(*p->released_buffers));
888 p->released_buffers = tmp;
890 dst = &p->released_buffers[p->num_released_buffers];
891 av_frame_move_ref(dst, f->f);
893 p->num_released_buffers++;
896 pthread_mutex_unlock(&fctx->buffer_mutex);