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).
68 uint8_t *buf; ///< backup storage for packet data when the input packet is not refcounted
69 int allocated_buf_size; ///< Size allocated for buf
71 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
72 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
73 int result; ///< The result of the last codec decode/encode() call.
76 STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
77 STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
78 STATE_GET_BUFFER, /**<
79 * Set when the codec calls get_buffer().
80 * State is returned to STATE_SETTING_UP afterwards.
82 STATE_GET_FORMAT, /**<
83 * Set when the codec calls get_format().
84 * State is returned to STATE_SETTING_UP afterwards.
86 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
90 * Array of frames passed to ff_thread_release_buffer().
91 * Frames are released after all threads referencing them are finished.
93 AVFrame *released_buffers;
94 int num_released_buffers;
95 int released_buffers_allocated;
97 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
98 int requested_flags; ///< flags passed to get_buffer() for requested_frame
100 const enum AVPixelFormat *available_formats; ///< Format array for get_format()
101 enum AVPixelFormat result_format; ///< get_format() result
105 * Context stored in the client AVCodecInternal thread_ctx.
107 typedef struct FrameThreadContext {
108 PerThreadContext *threads; ///< The contexts for each thread.
109 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
111 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
113 int next_decoding; ///< The next context to submit a packet to.
114 int next_finished; ///< The next context to return output from.
117 * Set for the first N packets, where N is the number of threads.
118 * While it is set, ff_thread_en/decode_frame won't return any results.
121 int die; ///< Set when threads should exit.
122 } FrameThreadContext;
124 #define THREAD_SAFE_CALLBACKS(avctx) \
125 ((avctx)->thread_safe_callbacks || (!(avctx)->get_buffer && (avctx)->get_buffer2 == avcodec_default_get_buffer2))
128 * Codec worker thread.
130 * Automatically calls ff_thread_finish_setup() if the codec does
131 * not provide an update_thread_context method, or if the codec returns
134 static attribute_align_arg void *frame_worker_thread(void *arg)
136 PerThreadContext *p = arg;
137 FrameThreadContext *fctx = p->parent;
138 AVCodecContext *avctx = p->avctx;
139 const AVCodec *codec = avctx->codec;
141 pthread_mutex_lock(&p->mutex);
143 while (p->state == STATE_INPUT_READY && !fctx->die)
144 pthread_cond_wait(&p->input_cond, &p->mutex);
146 if (fctx->die) break;
148 if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
149 ff_thread_finish_setup(avctx);
151 av_frame_unref(p->frame);
153 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
155 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
156 if (avctx->internal->allocate_progress)
157 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
158 "free the frame on failure. This is a bug, please report it.\n");
159 av_frame_unref(p->frame);
162 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
164 pthread_mutex_lock(&p->progress_mutex);
166 for (i = 0; i < MAX_BUFFERS; i++)
167 if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
168 p->progress[i][0] = INT_MAX;
169 p->progress[i][1] = INT_MAX;
172 p->state = STATE_INPUT_READY;
174 pthread_cond_broadcast(&p->progress_cond);
175 pthread_cond_signal(&p->output_cond);
176 pthread_mutex_unlock(&p->progress_mutex);
178 pthread_mutex_unlock(&p->mutex);
184 * Update the next thread's AVCodecContext with values from the reference thread's context.
186 * @param dst The destination context.
187 * @param src The source context.
188 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
190 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
195 dst->time_base = src->time_base;
196 dst->width = src->width;
197 dst->height = src->height;
198 dst->pix_fmt = src->pix_fmt;
200 dst->coded_width = src->coded_width;
201 dst->coded_height = src->coded_height;
203 dst->has_b_frames = src->has_b_frames;
204 dst->idct_algo = src->idct_algo;
206 dst->bits_per_coded_sample = src->bits_per_coded_sample;
207 dst->sample_aspect_ratio = src->sample_aspect_ratio;
208 dst->dtg_active_format = src->dtg_active_format;
210 dst->profile = src->profile;
211 dst->level = src->level;
213 dst->bits_per_raw_sample = src->bits_per_raw_sample;
214 dst->ticks_per_frame = src->ticks_per_frame;
215 dst->color_primaries = src->color_primaries;
217 dst->color_trc = src->color_trc;
218 dst->colorspace = src->colorspace;
219 dst->color_range = src->color_range;
220 dst->chroma_sample_location = src->chroma_sample_location;
222 dst->hwaccel = src->hwaccel;
223 dst->hwaccel_context = src->hwaccel_context;
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;
232 dst->delay = src->thread_count - 1;
233 dst->coded_frame = src->coded_frame;
235 if (dst->codec->update_thread_context)
236 err = dst->codec->update_thread_context(dst, src);
243 * Update the next thread's AVCodecContext with values set by the user.
245 * @param dst The destination context.
246 * @param src The source context.
247 * @return 0 on success, negative error code on failure
249 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
251 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
252 dst->flags = src->flags;
254 dst->draw_horiz_band= src->draw_horiz_band;
255 dst->get_buffer2 = src->get_buffer2;
256 #if FF_API_GET_BUFFER
257 FF_DISABLE_DEPRECATION_WARNINGS
258 dst->get_buffer = src->get_buffer;
259 dst->release_buffer = src->release_buffer;
260 FF_ENABLE_DEPRECATION_WARNINGS
263 dst->opaque = src->opaque;
264 dst->debug = src->debug;
265 dst->debug_mv = src->debug_mv;
267 dst->slice_flags = src->slice_flags;
268 dst->flags2 = src->flags2;
270 copy_fields(skip_loop_filter, subtitle_header);
272 dst->frame_number = src->frame_number;
273 dst->reordered_opaque = src->reordered_opaque;
274 dst->thread_safe_callbacks = src->thread_safe_callbacks;
276 if (src->slice_count && src->slice_offset) {
277 if (dst->slice_count < src->slice_count) {
278 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
279 sizeof(*dst->slice_offset));
281 av_free(dst->slice_offset);
282 return AVERROR(ENOMEM);
284 dst->slice_offset = tmp;
286 memcpy(dst->slice_offset, src->slice_offset,
287 src->slice_count * sizeof(*dst->slice_offset));
289 dst->slice_count = src->slice_count;
294 /// Releases the buffers that this decoding thread was the last user of.
295 static void release_delayed_buffers(PerThreadContext *p)
297 FrameThreadContext *fctx = p->parent;
299 while (p->num_released_buffers > 0) {
302 pthread_mutex_lock(&fctx->buffer_mutex);
304 // fix extended data in case the caller screwed it up
305 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
306 p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
307 f = &p->released_buffers[--p->num_released_buffers];
308 f->extended_data = f->data;
311 pthread_mutex_unlock(&fctx->buffer_mutex);
315 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
317 FrameThreadContext *fctx = p->parent;
318 PerThreadContext *prev_thread = fctx->prev_thread;
319 const AVCodec *codec = p->avctx->codec;
321 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
323 pthread_mutex_lock(&p->mutex);
325 release_delayed_buffers(p);
329 if (prev_thread->state == STATE_SETTING_UP) {
330 pthread_mutex_lock(&prev_thread->progress_mutex);
331 while (prev_thread->state == STATE_SETTING_UP)
332 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
333 pthread_mutex_unlock(&prev_thread->progress_mutex);
336 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
338 pthread_mutex_unlock(&p->mutex);
343 av_buffer_unref(&p->avpkt.buf);
346 p->avpkt.buf = av_buffer_ref(avpkt->buf);
348 av_fast_malloc(&p->buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
350 pthread_mutex_unlock(&p->mutex);
351 return AVERROR(ENOMEM);
353 p->avpkt.data = p->buf;
354 memcpy(p->buf, avpkt->data, avpkt->size);
355 memset(p->buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
358 p->state = STATE_SETTING_UP;
359 pthread_cond_signal(&p->input_cond);
360 pthread_mutex_unlock(&p->mutex);
363 * If the client doesn't have a thread-safe get_buffer(),
364 * then decoding threads call back to the main thread,
365 * and it calls back to the client here.
368 FF_DISABLE_DEPRECATION_WARNINGS
369 if (!p->avctx->thread_safe_callbacks && (
370 p->avctx->get_format != avcodec_default_get_format ||
371 #if FF_API_GET_BUFFER
372 p->avctx->get_buffer ||
374 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
375 FF_ENABLE_DEPRECATION_WARNINGS
376 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
378 pthread_mutex_lock(&p->progress_mutex);
379 while (p->state == STATE_SETTING_UP)
380 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
383 case STATE_GET_BUFFER:
384 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
386 case STATE_GET_FORMAT:
387 p->result_format = p->avctx->get_format(p->avctx, p->available_formats);
394 p->state = STATE_SETTING_UP;
395 pthread_cond_signal(&p->progress_cond);
397 pthread_mutex_unlock(&p->progress_mutex);
401 fctx->prev_thread = p;
402 fctx->next_decoding++;
407 int ff_thread_decode_frame(AVCodecContext *avctx,
408 AVFrame *picture, int *got_picture_ptr,
411 FrameThreadContext *fctx = avctx->internal->thread_ctx;
412 int finished = fctx->next_finished;
417 * Submit a packet to the next decoding thread.
420 p = &fctx->threads[fctx->next_decoding];
421 err = update_context_from_user(p->avctx, avctx);
423 err = submit_packet(p, avpkt);
427 * If we're still receiving the initial packets, don't return a frame.
430 if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
433 if (fctx->delaying) {
440 * Return the next available frame from the oldest thread.
441 * If we're at the end of the stream, then we have to skip threads that
442 * didn't output a frame, because we don't want to accidentally signal
443 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
447 p = &fctx->threads[finished++];
449 if (p->state != STATE_INPUT_READY) {
450 pthread_mutex_lock(&p->progress_mutex);
451 while (p->state != STATE_INPUT_READY)
452 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
453 pthread_mutex_unlock(&p->progress_mutex);
456 av_frame_move_ref(picture, p->frame);
457 *got_picture_ptr = p->got_frame;
458 picture->pkt_dts = p->avpkt.dts;
461 * A later call with avkpt->size == 0 may loop over all threads,
462 * including this one, searching for a frame to return before being
463 * stopped by the "finished != fctx->next_finished" condition.
464 * Make sure we don't mistakenly return the same frame again.
468 if (finished >= avctx->thread_count) finished = 0;
469 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
471 update_context_from_thread(avctx, p->avctx, 1);
473 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
475 fctx->next_finished = finished;
477 /* return the size of the consumed packet if no error occurred */
478 return (p->result >= 0) ? avpkt->size : p->result;
481 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
484 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
486 if (!progress || progress[field] >= n) return;
488 p = f->owner->internal->thread_ctx;
490 if (f->owner->debug&FF_DEBUG_THREADS)
491 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
493 pthread_mutex_lock(&p->progress_mutex);
495 pthread_cond_broadcast(&p->progress_cond);
496 pthread_mutex_unlock(&p->progress_mutex);
499 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
502 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
504 if (!progress || progress[field] >= n) return;
506 p = f->owner->internal->thread_ctx;
508 if (f->owner->debug&FF_DEBUG_THREADS)
509 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
511 pthread_mutex_lock(&p->progress_mutex);
512 while (progress[field] < n)
513 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
514 pthread_mutex_unlock(&p->progress_mutex);
517 void ff_thread_finish_setup(AVCodecContext *avctx) {
518 PerThreadContext *p = avctx->internal->thread_ctx;
520 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
522 if(p->state == STATE_SETUP_FINISHED){
523 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
526 pthread_mutex_lock(&p->progress_mutex);
527 p->state = STATE_SETUP_FINISHED;
528 pthread_cond_broadcast(&p->progress_cond);
529 pthread_mutex_unlock(&p->progress_mutex);
532 /// Waits for all threads to finish.
533 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
537 for (i = 0; i < thread_count; i++) {
538 PerThreadContext *p = &fctx->threads[i];
540 if (p->state != STATE_INPUT_READY) {
541 pthread_mutex_lock(&p->progress_mutex);
542 while (p->state != STATE_INPUT_READY)
543 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
544 pthread_mutex_unlock(&p->progress_mutex);
550 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
552 FrameThreadContext *fctx = avctx->internal->thread_ctx;
553 const AVCodec *codec = avctx->codec;
556 park_frame_worker_threads(fctx, thread_count);
558 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
559 if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
560 av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
561 fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
562 fctx->threads->avctx->internal->is_copy = 1;
567 for (i = 0; i < thread_count; i++) {
568 PerThreadContext *p = &fctx->threads[i];
570 pthread_mutex_lock(&p->mutex);
571 pthread_cond_signal(&p->input_cond);
572 pthread_mutex_unlock(&p->mutex);
575 pthread_join(p->thread, NULL);
579 codec->close(p->avctx);
583 release_delayed_buffers(p);
584 av_frame_free(&p->frame);
587 for (i = 0; i < thread_count; i++) {
588 PerThreadContext *p = &fctx->threads[i];
590 pthread_mutex_destroy(&p->mutex);
591 pthread_mutex_destroy(&p->progress_mutex);
592 pthread_cond_destroy(&p->input_cond);
593 pthread_cond_destroy(&p->progress_cond);
594 pthread_cond_destroy(&p->output_cond);
595 av_buffer_unref(&p->avpkt.buf);
597 av_freep(&p->released_buffers);
600 av_freep(&p->avctx->priv_data);
601 av_freep(&p->avctx->slice_offset);
604 av_freep(&p->avctx->internal);
608 av_freep(&fctx->threads);
609 pthread_mutex_destroy(&fctx->buffer_mutex);
610 av_freep(&avctx->internal->thread_ctx);
613 int ff_frame_thread_init(AVCodecContext *avctx)
615 int thread_count = avctx->thread_count;
616 const AVCodec *codec = avctx->codec;
617 AVCodecContext *src = avctx;
618 FrameThreadContext *fctx;
626 int nb_cpus = av_cpu_count();
627 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
629 // use number of cores + 1 as thread count if there is more than one
631 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
633 thread_count = avctx->thread_count = 1;
636 if (thread_count <= 1) {
637 avctx->active_thread_type = 0;
641 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
643 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
644 pthread_mutex_init(&fctx->buffer_mutex, NULL);
647 for (i = 0; i < thread_count; i++) {
648 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
649 PerThreadContext *p = &fctx->threads[i];
651 pthread_mutex_init(&p->mutex, NULL);
652 pthread_mutex_init(&p->progress_mutex, NULL);
653 pthread_cond_init(&p->input_cond, NULL);
654 pthread_cond_init(&p->progress_cond, NULL);
655 pthread_cond_init(&p->output_cond, NULL);
657 p->frame = av_frame_alloc();
659 err = AVERROR(ENOMEM);
668 err = AVERROR(ENOMEM);
674 copy->internal = av_malloc(sizeof(AVCodecInternal));
675 if (!copy->internal) {
676 err = AVERROR(ENOMEM);
679 *copy->internal = *src->internal;
680 copy->internal->thread_ctx = p;
681 copy->internal->pkt = &p->avpkt;
687 err = codec->init(copy);
689 update_context_from_thread(avctx, copy, 1);
691 copy->priv_data = av_malloc(codec->priv_data_size);
692 if (!copy->priv_data) {
693 err = AVERROR(ENOMEM);
696 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
697 copy->internal->is_copy = 1;
699 if (codec->init_thread_copy)
700 err = codec->init_thread_copy(copy);
705 err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
706 p->thread_init= !err;
714 ff_frame_thread_free(avctx, i+1);
719 void ff_thread_flush(AVCodecContext *avctx)
722 FrameThreadContext *fctx = avctx->internal->thread_ctx;
726 park_frame_worker_threads(fctx, avctx->thread_count);
727 if (fctx->prev_thread) {
728 if (fctx->prev_thread != &fctx->threads[0])
729 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
730 if (avctx->codec->flush)
731 avctx->codec->flush(fctx->threads[0].avctx);
734 fctx->next_decoding = fctx->next_finished = 0;
736 fctx->prev_thread = NULL;
737 for (i = 0; i < avctx->thread_count; i++) {
738 PerThreadContext *p = &fctx->threads[i];
739 // Make sure decode flush calls with size=0 won't return old frames
741 av_frame_unref(p->frame);
743 release_delayed_buffers(p);
747 int ff_thread_can_start_frame(AVCodecContext *avctx)
749 PerThreadContext *p = avctx->internal->thread_ctx;
750 if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
751 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
757 static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
759 PerThreadContext *p = avctx->internal->thread_ctx;
764 ff_init_buffer_info(avctx, f->f);
766 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
767 return ff_get_buffer(avctx, f->f, flags);
769 if (p->state != STATE_SETTING_UP &&
770 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
771 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
775 if (avctx->internal->allocate_progress) {
777 f->progress = av_buffer_alloc(2 * sizeof(int));
779 return AVERROR(ENOMEM);
781 progress = (int*)f->progress->data;
783 progress[0] = progress[1] = -1;
786 pthread_mutex_lock(&p->parent->buffer_mutex);
787 FF_DISABLE_DEPRECATION_WARNINGS
788 if (avctx->thread_safe_callbacks || (
789 #if FF_API_GET_BUFFER
790 !avctx->get_buffer &&
792 avctx->get_buffer2 == avcodec_default_get_buffer2)) {
793 FF_ENABLE_DEPRECATION_WARNINGS
794 err = ff_get_buffer(avctx, f->f, flags);
796 pthread_mutex_lock(&p->progress_mutex);
797 p->requested_frame = f->f;
798 p->requested_flags = flags;
799 p->state = STATE_GET_BUFFER;
800 pthread_cond_broadcast(&p->progress_cond);
802 while (p->state != STATE_SETTING_UP)
803 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
807 pthread_mutex_unlock(&p->progress_mutex);
810 if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
811 ff_thread_finish_setup(avctx);
814 av_buffer_unref(&f->progress);
816 pthread_mutex_unlock(&p->parent->buffer_mutex);
821 enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
823 enum AVPixelFormat res;
824 PerThreadContext *p = avctx->internal->thread_ctx;
825 if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
826 avctx->get_format == avcodec_default_get_format)
827 return avctx->get_format(avctx, fmt);
828 if (p->state != STATE_SETTING_UP) {
829 av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
832 pthread_mutex_lock(&p->progress_mutex);
833 p->available_formats = fmt;
834 p->state = STATE_GET_FORMAT;
835 pthread_cond_broadcast(&p->progress_cond);
837 while (p->state != STATE_SETTING_UP)
838 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
840 res = p->result_format;
842 pthread_mutex_unlock(&p->progress_mutex);
847 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
849 int ret = thread_get_buffer_internal(avctx, f, flags);
851 av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
855 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
857 PerThreadContext *p = avctx->internal->thread_ctx;
858 FrameThreadContext *fctx;
860 FF_DISABLE_DEPRECATION_WARNINGS
861 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
862 avctx->thread_safe_callbacks ||
864 #if FF_API_GET_BUFFER
865 !avctx->get_buffer &&
867 avctx->get_buffer2 == avcodec_default_get_buffer2);
868 FF_ENABLE_DEPRECATION_WARNINGS
873 if (avctx->debug & FF_DEBUG_BUFFERS)
874 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
876 av_buffer_unref(&f->progress);
879 if (can_direct_free) {
880 av_frame_unref(f->f);
885 pthread_mutex_lock(&fctx->buffer_mutex);
887 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
889 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
890 (p->num_released_buffers + 1) *
891 sizeof(*p->released_buffers));
894 p->released_buffers = tmp;
896 dst = &p->released_buffers[p->num_released_buffers];
897 av_frame_move_ref(dst, f->f);
899 p->num_released_buffers++;
902 pthread_mutex_unlock(&fctx->buffer_mutex);