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
31 #include "pthread_internal.h"
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"
47 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
49 typedef struct PerThreadContext {
50 struct FrameThreadContext *parent;
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.
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.
61 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
63 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
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.
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().
72 STATE_GET_BUFFER, /**<
73 * Set when the codec calls get_buffer().
74 * State is returned to STATE_SETTING_UP afterwards.
76 STATE_GET_FORMAT, /**<
77 * Set when the codec calls get_format().
78 * State is returned to STATE_SETTING_UP afterwards.
80 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
84 * Array of frames passed to ff_thread_release_buffer().
85 * Frames are released after all threads referencing them are finished.
87 AVFrame *released_buffers;
88 int num_released_buffers;
89 int released_buffers_allocated;
91 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
92 int requested_flags; ///< flags passed to get_buffer() for requested_frame
94 const enum AVPixelFormat *available_formats; ///< Format array for get_format()
95 enum AVPixelFormat result_format; ///< get_format() result
97 int die; ///< Set when the thread should exit.
101 * Context stored in the client AVCodecInternal thread_ctx.
103 typedef struct FrameThreadContext {
104 PerThreadContext *threads; ///< The contexts for each thread.
105 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
107 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
109 int next_decoding; ///< The next context to submit a packet to.
110 int next_finished; ///< The next context to return output from.
113 * Set for the first N packets, where N is the number of threads.
114 * While it is set, ff_thread_en/decode_frame won't return any results.
116 } FrameThreadContext;
118 #define THREAD_SAFE_CALLBACKS(avctx) \
119 ((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
122 * Codec worker thread.
124 * Automatically calls ff_thread_finish_setup() if the codec does
125 * not provide an update_thread_context method, or if the codec returns
128 static attribute_align_arg void *frame_worker_thread(void *arg)
130 PerThreadContext *p = arg;
131 FrameThreadContext *fctx = p->parent;
132 AVCodecContext *avctx = p->avctx;
133 const AVCodec *codec = avctx->codec;
135 pthread_mutex_lock(&p->mutex);
137 while (p->state == STATE_INPUT_READY && !p->die)
138 pthread_cond_wait(&p->input_cond, &p->mutex);
142 if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
143 ff_thread_finish_setup(avctx);
145 av_frame_unref(p->frame);
147 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
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);
156 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
158 pthread_mutex_lock(&p->progress_mutex);
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;
166 p->state = STATE_INPUT_READY;
168 pthread_cond_broadcast(&p->progress_cond);
169 pthread_cond_signal(&p->output_cond);
170 pthread_mutex_unlock(&p->progress_mutex);
172 pthread_mutex_unlock(&p->mutex);
178 * Update the next thread's AVCodecContext with values from the reference thread's context.
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
185 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
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;
196 dst->coded_width = src->coded_width;
197 dst->coded_height = src->coded_height;
199 dst->has_b_frames = src->has_b_frames;
200 dst->idct_algo = src->idct_algo;
202 dst->bits_per_coded_sample = src->bits_per_coded_sample;
203 dst->sample_aspect_ratio = src->sample_aspect_ratio;
205 FF_DISABLE_DEPRECATION_WARNINGS
206 dst->dtg_active_format = src->dtg_active_format;
207 FF_ENABLE_DEPRECATION_WARNINGS
208 #endif /* FF_API_AFD */
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;
229 dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
233 dst->delay = src->thread_count - 1;
234 #if FF_API_CODED_FRAME
235 FF_DISABLE_DEPRECATION_WARNINGS
236 dst->coded_frame = src->coded_frame;
237 FF_ENABLE_DEPRECATION_WARNINGS
240 if (dst->codec->update_thread_context)
241 err = dst->codec->update_thread_context(dst, src);
248 * Update the next thread's AVCodecContext with values set by the user.
250 * @param dst The destination context.
251 * @param src The source context.
252 * @return 0 on success, negative error code on failure
254 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
256 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
257 dst->flags = src->flags;
259 dst->draw_horiz_band= src->draw_horiz_band;
260 dst->get_buffer2 = src->get_buffer2;
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 err = av_reallocp_array(&dst->slice_offset, src->slice_count,
278 sizeof(*dst->slice_offset));
282 memcpy(dst->slice_offset, src->slice_offset,
283 src->slice_count * sizeof(*dst->slice_offset));
285 dst->slice_count = src->slice_count;
290 /// Releases the buffers that this decoding thread was the last user of.
291 static void release_delayed_buffers(PerThreadContext *p)
293 FrameThreadContext *fctx = p->parent;
295 while (p->num_released_buffers > 0) {
298 pthread_mutex_lock(&fctx->buffer_mutex);
300 // fix extended data in case the caller screwed it up
301 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
302 p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
303 f = &p->released_buffers[--p->num_released_buffers];
304 f->extended_data = f->data;
307 pthread_mutex_unlock(&fctx->buffer_mutex);
311 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
313 FrameThreadContext *fctx = p->parent;
314 PerThreadContext *prev_thread = fctx->prev_thread;
315 const AVCodec *codec = p->avctx->codec;
317 if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY))
320 pthread_mutex_lock(&p->mutex);
322 release_delayed_buffers(p);
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);
333 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
335 pthread_mutex_unlock(&p->mutex);
340 av_packet_unref(&p->avpkt);
341 av_packet_ref(&p->avpkt, avpkt);
343 p->state = STATE_SETTING_UP;
344 pthread_cond_signal(&p->input_cond);
345 pthread_mutex_unlock(&p->mutex);
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.
353 if (!p->avctx->thread_safe_callbacks && (
354 p->avctx->get_format != avcodec_default_get_format ||
355 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
356 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
358 pthread_mutex_lock(&p->progress_mutex);
359 while (p->state == STATE_SETTING_UP)
360 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
363 case STATE_GET_BUFFER:
364 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
366 case STATE_GET_FORMAT:
367 p->result_format = ff_get_format(p->avctx, p->available_formats);
374 p->state = STATE_SETTING_UP;
375 pthread_cond_signal(&p->progress_cond);
377 pthread_mutex_unlock(&p->progress_mutex);
381 fctx->prev_thread = p;
382 fctx->next_decoding++;
387 int ff_thread_decode_frame(AVCodecContext *avctx,
388 AVFrame *picture, int *got_picture_ptr,
391 FrameThreadContext *fctx = avctx->internal->thread_ctx;
392 int finished = fctx->next_finished;
397 * Submit a packet to the next decoding thread.
400 p = &fctx->threads[fctx->next_decoding];
401 err = update_context_from_user(p->avctx, avctx);
403 err = submit_packet(p, avpkt);
407 * If we're still receiving the initial packets, don't return a frame.
410 if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
413 if (fctx->delaying) {
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).
427 p = &fctx->threads[finished++];
429 if (p->state != STATE_INPUT_READY) {
430 pthread_mutex_lock(&p->progress_mutex);
431 while (p->state != STATE_INPUT_READY)
432 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
433 pthread_mutex_unlock(&p->progress_mutex);
436 av_frame_move_ref(picture, p->frame);
437 *got_picture_ptr = p->got_frame;
438 picture->pkt_dts = p->avpkt.dts;
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.
451 if (finished >= avctx->thread_count) finished = 0;
452 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
454 update_context_from_thread(avctx, p->avctx, 1);
456 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
458 fctx->next_finished = finished;
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.
465 if (!avpkt->size && !*got_picture_ptr)
468 /* return the size of the consumed packet if no error occurred */
469 return (p->result >= 0) ? avpkt->size : p->result;
472 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
475 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
477 if (!progress || progress[field] >= n) return;
479 p = f->owner->internal->thread_ctx;
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);
484 pthread_mutex_lock(&p->progress_mutex);
486 pthread_cond_broadcast(&p->progress_cond);
487 pthread_mutex_unlock(&p->progress_mutex);
490 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
493 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
495 if (!progress || progress[field] >= n) return;
497 p = f->owner->internal->thread_ctx;
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);
502 pthread_mutex_lock(&p->progress_mutex);
503 while (progress[field] < n)
504 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
505 pthread_mutex_unlock(&p->progress_mutex);
508 void ff_thread_finish_setup(AVCodecContext *avctx) {
509 PerThreadContext *p = avctx->internal->thread_ctx;
511 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
513 if(p->state == STATE_SETUP_FINISHED){
514 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
517 pthread_mutex_lock(&p->progress_mutex);
518 p->state = STATE_SETUP_FINISHED;
519 pthread_cond_broadcast(&p->progress_cond);
520 pthread_mutex_unlock(&p->progress_mutex);
523 /// Waits for all threads to finish.
524 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
528 for (i = 0; i < thread_count; i++) {
529 PerThreadContext *p = &fctx->threads[i];
531 if (p->state != STATE_INPUT_READY) {
532 pthread_mutex_lock(&p->progress_mutex);
533 while (p->state != STATE_INPUT_READY)
534 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
535 pthread_mutex_unlock(&p->progress_mutex);
541 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
543 FrameThreadContext *fctx = avctx->internal->thread_ctx;
544 const AVCodec *codec = avctx->codec;
547 park_frame_worker_threads(fctx, thread_count);
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");
552 fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
553 fctx->threads->avctx->internal->is_copy = 1;
556 for (i = 0; i < thread_count; i++) {
557 PerThreadContext *p = &fctx->threads[i];
559 pthread_mutex_lock(&p->mutex);
561 pthread_cond_signal(&p->input_cond);
562 pthread_mutex_unlock(&p->mutex);
565 pthread_join(p->thread, NULL);
568 if (codec->close && p->avctx)
569 codec->close(p->avctx);
571 release_delayed_buffers(p);
572 av_frame_free(&p->frame);
575 for (i = 0; i < thread_count; i++) {
576 PerThreadContext *p = &fctx->threads[i];
578 pthread_mutex_destroy(&p->mutex);
579 pthread_mutex_destroy(&p->progress_mutex);
580 pthread_cond_destroy(&p->input_cond);
581 pthread_cond_destroy(&p->progress_cond);
582 pthread_cond_destroy(&p->output_cond);
583 av_packet_unref(&p->avpkt);
584 av_freep(&p->released_buffers);
587 av_freep(&p->avctx->priv_data);
588 av_freep(&p->avctx->slice_offset);
592 av_freep(&p->avctx->internal);
596 av_freep(&fctx->threads);
597 pthread_mutex_destroy(&fctx->buffer_mutex);
598 av_freep(&avctx->internal->thread_ctx);
600 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
601 av_opt_free(avctx->priv_data);
605 int ff_frame_thread_init(AVCodecContext *avctx)
607 int thread_count = avctx->thread_count;
608 const AVCodec *codec = avctx->codec;
609 AVCodecContext *src = avctx;
610 FrameThreadContext *fctx;
618 int nb_cpus = av_cpu_count();
619 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
621 // use number of cores + 1 as thread count if there is more than one
623 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
625 thread_count = avctx->thread_count = 1;
628 if (thread_count <= 1) {
629 avctx->active_thread_type = 0;
633 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
635 return AVERROR(ENOMEM);
637 fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
638 if (!fctx->threads) {
639 av_freep(&avctx->internal->thread_ctx);
640 return AVERROR(ENOMEM);
643 pthread_mutex_init(&fctx->buffer_mutex, NULL);
646 for (i = 0; i < thread_count; i++) {
647 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
648 PerThreadContext *p = &fctx->threads[i];
650 pthread_mutex_init(&p->mutex, NULL);
651 pthread_mutex_init(&p->progress_mutex, NULL);
652 pthread_cond_init(&p->input_cond, NULL);
653 pthread_cond_init(&p->progress_cond, NULL);
654 pthread_cond_init(&p->output_cond, NULL);
656 p->frame = av_frame_alloc();
659 err = AVERROR(ENOMEM);
667 err = AVERROR(ENOMEM);
673 copy->internal = av_malloc(sizeof(AVCodecInternal));
674 if (!copy->internal) {
675 copy->priv_data = NULL;
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);
732 fctx->next_decoding = fctx->next_finished = 0;
734 fctx->prev_thread = NULL;
735 for (i = 0; i < avctx->thread_count; i++) {
736 PerThreadContext *p = &fctx->threads[i];
737 // Make sure decode flush calls with size=0 won't return old frames
739 av_frame_unref(p->frame);
741 release_delayed_buffers(p);
743 if (avctx->codec->flush)
744 avctx->codec->flush(p->avctx);
748 int ff_thread_can_start_frame(AVCodecContext *avctx)
750 PerThreadContext *p = avctx->internal->thread_ctx;
751 if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
752 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
758 static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
760 PerThreadContext *p = avctx->internal->thread_ctx;
765 ff_init_buffer_info(avctx, f->f);
767 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
768 return ff_get_buffer(avctx, f->f, flags);
770 if (p->state != STATE_SETTING_UP &&
771 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
772 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
776 if (avctx->internal->allocate_progress) {
778 f->progress = av_buffer_alloc(2 * sizeof(int));
780 return AVERROR(ENOMEM);
782 progress = (int*)f->progress->data;
784 progress[0] = progress[1] = -1;
787 pthread_mutex_lock(&p->parent->buffer_mutex);
788 if (avctx->thread_safe_callbacks ||
789 avctx->get_buffer2 == avcodec_default_get_buffer2) {
790 err = ff_get_buffer(avctx, f->f, flags);
792 pthread_mutex_lock(&p->progress_mutex);
793 p->requested_frame = f->f;
794 p->requested_flags = flags;
795 p->state = STATE_GET_BUFFER;
796 pthread_cond_broadcast(&p->progress_cond);
798 while (p->state != STATE_SETTING_UP)
799 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
803 pthread_mutex_unlock(&p->progress_mutex);
806 if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
807 ff_thread_finish_setup(avctx);
809 av_buffer_unref(&f->progress);
811 pthread_mutex_unlock(&p->parent->buffer_mutex);
816 enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
818 enum AVPixelFormat res;
819 PerThreadContext *p = avctx->internal->thread_ctx;
820 if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
821 avctx->get_format == avcodec_default_get_format)
822 return ff_get_format(avctx, fmt);
823 if (p->state != STATE_SETTING_UP) {
824 av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
827 pthread_mutex_lock(&p->progress_mutex);
828 p->available_formats = fmt;
829 p->state = STATE_GET_FORMAT;
830 pthread_cond_broadcast(&p->progress_cond);
832 while (p->state != STATE_SETTING_UP)
833 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
835 res = p->result_format;
837 pthread_mutex_unlock(&p->progress_mutex);
842 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
844 int ret = thread_get_buffer_internal(avctx, f, flags);
846 av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
850 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
852 PerThreadContext *p = avctx->internal->thread_ctx;
853 FrameThreadContext *fctx;
855 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
856 avctx->thread_safe_callbacks ||
857 avctx->get_buffer2 == avcodec_default_get_buffer2;
859 if (!f->f || !f->f->buf[0])
862 if (avctx->debug & FF_DEBUG_BUFFERS)
863 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
865 av_buffer_unref(&f->progress);
868 if (can_direct_free) {
869 av_frame_unref(f->f);
874 pthread_mutex_lock(&fctx->buffer_mutex);
876 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
878 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
879 (p->num_released_buffers + 1) *
880 sizeof(*p->released_buffers));
883 p->released_buffers = tmp;
885 dst = &p->released_buffers[p->num_released_buffers];
886 av_frame_move_ref(dst, f->f);
888 p->num_released_buffers++;
891 pthread_mutex_unlock(&fctx->buffer_mutex);