2 * Copyright (c) 2004 Roman Shaposhnik
3 * Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com)
5 * Many thanks to Steven M. Schultz for providing clever ideas and
6 * to Michael Niedermayer <michaelni@gmx.at> for writing initial
9 * This file is part of Libav.
11 * Libav is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
16 * Libav is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with Libav; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * Multithreading support functions
29 * @see doc/multithreading.txt
34 #if HAVE_SCHED_GETAFFINITY
46 #include "w32pthreads.h"
49 typedef int (action_func)(AVCodecContext *c, void *arg);
50 typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
52 typedef struct ThreadContext {
62 pthread_cond_t last_job_cond;
63 pthread_cond_t current_job_cond;
64 pthread_mutex_t current_job_lock;
69 /// Max number of frame buffers that can be allocated when using frame threads.
70 #define MAX_BUFFERS (32+1)
73 * Context used by codec threads and stored in their AVCodecContext thread_opaque.
75 typedef struct PerThreadContext {
76 struct FrameThreadContext *parent;
80 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
81 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
82 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
84 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
85 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
87 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
89 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
90 int allocated_buf_size; ///< Size allocated for avpkt.data
92 AVFrame frame; ///< Output frame (for decoding) or input (for encoding).
93 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
94 int result; ///< The result of the last codec decode/encode() call.
97 STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
98 STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
99 STATE_GET_BUFFER, /**<
100 * Set when the codec calls get_buffer().
101 * State is returned to STATE_SETTING_UP afterwards.
103 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
107 * Array of frames passed to ff_thread_release_buffer().
108 * Frames are released after all threads referencing them are finished.
110 AVFrame released_buffers[MAX_BUFFERS];
111 int num_released_buffers;
114 * Array of progress values used by ff_thread_get_buffer().
116 int progress[MAX_BUFFERS][2];
117 uint8_t progress_used[MAX_BUFFERS];
119 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
123 * Context stored in the client AVCodecContext thread_opaque.
125 typedef struct FrameThreadContext {
126 PerThreadContext *threads; ///< The contexts for each thread.
127 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
129 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
131 int next_decoding; ///< The next context to submit a packet to.
132 int next_finished; ///< The next context to return output from.
135 * Set for the first N packets, where N is the number of threads.
136 * While it is set, ff_thread_en/decode_frame won't return any results.
139 int die; ///< Set when threads should exit.
140 } FrameThreadContext;
143 /* H264 slice threading seems to be buggy with more than 16 threads,
144 * limit the number of threads to 16 for automatic detection */
145 #define MAX_AUTO_THREADS 16
147 static int get_logical_cpus(AVCodecContext *avctx)
149 int ret, nb_cpus = 1;
150 #if HAVE_SCHED_GETAFFINITY
155 ret = sched_getaffinity(0, sizeof(cpuset), &cpuset);
157 nb_cpus = CPU_COUNT(&cpuset);
160 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
161 return FFMIN(nb_cpus, MAX_AUTO_THREADS);
165 static void* attribute_align_arg worker(void *v)
167 AVCodecContext *avctx = v;
168 ThreadContext *c = avctx->thread_opaque;
169 int our_job = c->job_count;
170 int thread_count = avctx->thread_count;
173 pthread_mutex_lock(&c->current_job_lock);
174 self_id = c->current_job++;
176 while (our_job >= c->job_count) {
177 if (c->current_job == thread_count + c->job_count)
178 pthread_cond_signal(&c->last_job_cond);
180 pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
184 pthread_mutex_unlock(&c->current_job_lock);
188 pthread_mutex_unlock(&c->current_job_lock);
190 c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
191 c->func2(avctx, c->args, our_job, self_id);
193 pthread_mutex_lock(&c->current_job_lock);
194 our_job = c->current_job++;
198 static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count)
200 pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
201 pthread_mutex_unlock(&c->current_job_lock);
204 static void thread_free(AVCodecContext *avctx)
206 ThreadContext *c = avctx->thread_opaque;
209 pthread_mutex_lock(&c->current_job_lock);
211 pthread_cond_broadcast(&c->current_job_cond);
212 pthread_mutex_unlock(&c->current_job_lock);
214 for (i=0; i<avctx->thread_count; i++)
215 pthread_join(c->workers[i], NULL);
217 pthread_mutex_destroy(&c->current_job_lock);
218 pthread_cond_destroy(&c->current_job_cond);
219 pthread_cond_destroy(&c->last_job_cond);
221 av_freep(&avctx->thread_opaque);
224 static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
226 ThreadContext *c= avctx->thread_opaque;
229 if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
230 return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
235 pthread_mutex_lock(&c->current_job_lock);
237 c->current_job = avctx->thread_count;
238 c->job_count = job_count;
239 c->job_size = job_size;
244 c->rets_count = job_count;
246 c->rets = &dummy_ret;
249 pthread_cond_broadcast(&c->current_job_cond);
251 avcodec_thread_park_workers(c, avctx->thread_count);
256 static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
258 ThreadContext *c= avctx->thread_opaque;
260 return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
263 static int thread_init(AVCodecContext *avctx)
267 int thread_count = avctx->thread_count;
270 int nb_cpus = get_logical_cpus(avctx);
271 // use number of cores + 1 as thread count if there is motre than one
273 thread_count = avctx->thread_count = nb_cpus + 1;
276 if (thread_count <= 1) {
277 avctx->active_thread_type = 0;
281 c = av_mallocz(sizeof(ThreadContext));
285 c->workers = av_mallocz(sizeof(pthread_t)*thread_count);
291 avctx->thread_opaque = c;
296 pthread_cond_init(&c->current_job_cond, NULL);
297 pthread_cond_init(&c->last_job_cond, NULL);
298 pthread_mutex_init(&c->current_job_lock, NULL);
299 pthread_mutex_lock(&c->current_job_lock);
300 for (i=0; i<thread_count; i++) {
301 if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
302 avctx->thread_count = i;
303 pthread_mutex_unlock(&c->current_job_lock);
304 ff_thread_free(avctx);
309 avcodec_thread_park_workers(c, thread_count);
311 avctx->execute = avcodec_thread_execute;
312 avctx->execute2 = avcodec_thread_execute2;
317 * Codec worker thread.
319 * Automatically calls ff_thread_finish_setup() if the codec does
320 * not provide an update_thread_context method, or if the codec returns
323 static attribute_align_arg void *frame_worker_thread(void *arg)
325 PerThreadContext *p = arg;
326 FrameThreadContext *fctx = p->parent;
327 AVCodecContext *avctx = p->avctx;
328 AVCodec *codec = avctx->codec;
331 if (p->state == STATE_INPUT_READY && !fctx->die) {
332 pthread_mutex_lock(&p->mutex);
333 while (p->state == STATE_INPUT_READY && !fctx->die)
334 pthread_cond_wait(&p->input_cond, &p->mutex);
335 pthread_mutex_unlock(&p->mutex);
338 if (fctx->die) break;
340 if (!codec->update_thread_context && avctx->thread_safe_callbacks)
341 ff_thread_finish_setup(avctx);
343 pthread_mutex_lock(&p->mutex);
344 avcodec_get_frame_defaults(&p->frame);
346 p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
348 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
350 p->state = STATE_INPUT_READY;
352 pthread_mutex_lock(&p->progress_mutex);
353 pthread_cond_signal(&p->output_cond);
354 pthread_mutex_unlock(&p->progress_mutex);
356 pthread_mutex_unlock(&p->mutex);
363 * Update the next thread's AVCodecContext with values from the reference thread's context.
365 * @param dst The destination context.
366 * @param src The source context.
367 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
369 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
374 dst->sub_id = src->sub_id;
375 dst->time_base = src->time_base;
376 dst->width = src->width;
377 dst->height = src->height;
378 dst->pix_fmt = src->pix_fmt;
380 dst->coded_width = src->coded_width;
381 dst->coded_height = src->coded_height;
383 dst->has_b_frames = src->has_b_frames;
384 dst->idct_algo = src->idct_algo;
385 dst->slice_count = src->slice_count;
387 dst->bits_per_coded_sample = src->bits_per_coded_sample;
388 dst->sample_aspect_ratio = src->sample_aspect_ratio;
389 dst->dtg_active_format = src->dtg_active_format;
391 dst->profile = src->profile;
392 dst->level = src->level;
394 dst->bits_per_raw_sample = src->bits_per_raw_sample;
395 dst->ticks_per_frame = src->ticks_per_frame;
396 dst->color_primaries = src->color_primaries;
398 dst->color_trc = src->color_trc;
399 dst->colorspace = src->colorspace;
400 dst->color_range = src->color_range;
401 dst->chroma_sample_location = src->chroma_sample_location;
405 dst->coded_frame = src->coded_frame;
407 if (dst->codec->update_thread_context)
408 err = dst->codec->update_thread_context(dst, src);
415 * Update the next thread's AVCodecContext with values set by the user.
417 * @param dst The destination context.
418 * @param src The source context.
420 static void update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
422 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
423 dst->flags = src->flags;
425 dst->draw_horiz_band= src->draw_horiz_band;
426 dst->get_buffer = src->get_buffer;
427 dst->release_buffer = src->release_buffer;
429 dst->opaque = src->opaque;
430 dst->dsp_mask = src->dsp_mask;
431 dst->debug = src->debug;
432 dst->debug_mv = src->debug_mv;
434 dst->slice_flags = src->slice_flags;
435 dst->flags2 = src->flags2;
437 copy_fields(skip_loop_filter, bidir_refine);
439 dst->frame_number = src->frame_number;
440 dst->reordered_opaque = src->reordered_opaque;
444 static void free_progress(AVFrame *f)
446 PerThreadContext *p = f->owner->thread_opaque;
447 int *progress = f->thread_opaque;
449 p->progress_used[(progress - p->progress[0]) / 2] = 0;
452 /// Releases the buffers that this decoding thread was the last user of.
453 static void release_delayed_buffers(PerThreadContext *p)
455 FrameThreadContext *fctx = p->parent;
457 while (p->num_released_buffers > 0) {
460 pthread_mutex_lock(&fctx->buffer_mutex);
461 f = &p->released_buffers[--p->num_released_buffers];
463 f->thread_opaque = NULL;
465 f->owner->release_buffer(f->owner, f);
466 pthread_mutex_unlock(&fctx->buffer_mutex);
470 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
472 FrameThreadContext *fctx = p->parent;
473 PerThreadContext *prev_thread = fctx->prev_thread;
474 AVCodec *codec = p->avctx->codec;
475 uint8_t *buf = p->avpkt.data;
477 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
479 pthread_mutex_lock(&p->mutex);
481 release_delayed_buffers(p);
485 if (prev_thread->state == STATE_SETTING_UP) {
486 pthread_mutex_lock(&prev_thread->progress_mutex);
487 while (prev_thread->state == STATE_SETTING_UP)
488 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
489 pthread_mutex_unlock(&prev_thread->progress_mutex);
492 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
494 pthread_mutex_unlock(&p->mutex);
499 av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
502 memcpy(buf, avpkt->data, avpkt->size);
503 memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
505 p->state = STATE_SETTING_UP;
506 pthread_cond_signal(&p->input_cond);
507 pthread_mutex_unlock(&p->mutex);
510 * If the client doesn't have a thread-safe get_buffer(),
511 * then decoding threads call back to the main thread,
512 * and it calls back to the client here.
515 if (!p->avctx->thread_safe_callbacks &&
516 p->avctx->get_buffer != avcodec_default_get_buffer) {
517 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
518 pthread_mutex_lock(&p->progress_mutex);
519 while (p->state == STATE_SETTING_UP)
520 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
522 if (p->state == STATE_GET_BUFFER) {
523 p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
524 p->state = STATE_SETTING_UP;
525 pthread_cond_signal(&p->progress_cond);
527 pthread_mutex_unlock(&p->progress_mutex);
531 fctx->prev_thread = p;
532 fctx->next_decoding++;
537 int ff_thread_decode_frame(AVCodecContext *avctx,
538 AVFrame *picture, int *got_picture_ptr,
541 FrameThreadContext *fctx = avctx->thread_opaque;
542 int finished = fctx->next_finished;
547 * Submit a packet to the next decoding thread.
550 p = &fctx->threads[fctx->next_decoding];
551 update_context_from_user(p->avctx, avctx);
552 err = submit_packet(p, avpkt);
556 * If we're still receiving the initial packets, don't return a frame.
559 if (fctx->delaying && avpkt->size) {
560 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
567 * Return the next available frame from the oldest thread.
568 * If we're at the end of the stream, then we have to skip threads that
569 * didn't output a frame, because we don't want to accidentally signal
570 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
574 p = &fctx->threads[finished++];
576 if (p->state != STATE_INPUT_READY) {
577 pthread_mutex_lock(&p->progress_mutex);
578 while (p->state != STATE_INPUT_READY)
579 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
580 pthread_mutex_unlock(&p->progress_mutex);
584 *got_picture_ptr = p->got_frame;
585 picture->pkt_dts = p->avpkt.dts;
588 * A later call with avkpt->size == 0 may loop over all threads,
589 * including this one, searching for a frame to return before being
590 * stopped by the "finished != fctx->next_finished" condition.
591 * Make sure we don't mistakenly return the same frame again.
595 if (finished >= avctx->thread_count) finished = 0;
596 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
598 update_context_from_thread(avctx, p->avctx, 1);
600 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
602 fctx->next_finished = finished;
604 /* return the size of the consumed packet if no error occurred */
605 return (p->result >= 0) ? avpkt->size : p->result;
608 void ff_thread_report_progress(AVFrame *f, int n, int field)
611 int *progress = f->thread_opaque;
613 if (!progress || progress[field] >= n) return;
615 p = f->owner->thread_opaque;
617 if (f->owner->debug&FF_DEBUG_THREADS)
618 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
620 pthread_mutex_lock(&p->progress_mutex);
622 pthread_cond_broadcast(&p->progress_cond);
623 pthread_mutex_unlock(&p->progress_mutex);
626 void ff_thread_await_progress(AVFrame *f, int n, int field)
629 int *progress = f->thread_opaque;
631 if (!progress || progress[field] >= n) return;
633 p = f->owner->thread_opaque;
635 if (f->owner->debug&FF_DEBUG_THREADS)
636 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
638 pthread_mutex_lock(&p->progress_mutex);
639 while (progress[field] < n)
640 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
641 pthread_mutex_unlock(&p->progress_mutex);
644 void ff_thread_finish_setup(AVCodecContext *avctx) {
645 PerThreadContext *p = avctx->thread_opaque;
647 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
649 pthread_mutex_lock(&p->progress_mutex);
650 p->state = STATE_SETUP_FINISHED;
651 pthread_cond_broadcast(&p->progress_cond);
652 pthread_mutex_unlock(&p->progress_mutex);
655 /// Waits for all threads to finish.
656 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
660 for (i = 0; i < thread_count; i++) {
661 PerThreadContext *p = &fctx->threads[i];
663 if (p->state != STATE_INPUT_READY) {
664 pthread_mutex_lock(&p->progress_mutex);
665 while (p->state != STATE_INPUT_READY)
666 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
667 pthread_mutex_unlock(&p->progress_mutex);
672 static void frame_thread_free(AVCodecContext *avctx, int thread_count)
674 FrameThreadContext *fctx = avctx->thread_opaque;
675 AVCodec *codec = avctx->codec;
678 park_frame_worker_threads(fctx, thread_count);
680 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
681 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
685 for (i = 0; i < thread_count; i++) {
686 PerThreadContext *p = &fctx->threads[i];
688 pthread_mutex_lock(&p->mutex);
689 pthread_cond_signal(&p->input_cond);
690 pthread_mutex_unlock(&p->mutex);
693 pthread_join(p->thread, NULL);
696 codec->close(p->avctx);
700 release_delayed_buffers(p);
703 for (i = 0; i < thread_count; i++) {
704 PerThreadContext *p = &fctx->threads[i];
706 avcodec_default_free_buffers(p->avctx);
708 pthread_mutex_destroy(&p->mutex);
709 pthread_mutex_destroy(&p->progress_mutex);
710 pthread_cond_destroy(&p->input_cond);
711 pthread_cond_destroy(&p->progress_cond);
712 pthread_cond_destroy(&p->output_cond);
713 av_freep(&p->avpkt.data);
716 av_freep(&p->avctx->priv_data);
717 av_freep(&p->avctx->internal);
723 av_freep(&fctx->threads);
724 pthread_mutex_destroy(&fctx->buffer_mutex);
725 av_freep(&avctx->thread_opaque);
728 static int frame_thread_init(AVCodecContext *avctx)
730 int thread_count = avctx->thread_count;
731 AVCodec *codec = avctx->codec;
732 AVCodecContext *src = avctx;
733 FrameThreadContext *fctx;
737 int nb_cpus = get_logical_cpus(avctx);
738 // use number of cores + 1 as thread count if there is motre than one
740 thread_count = avctx->thread_count = nb_cpus + 1;
743 if (thread_count <= 1) {
744 avctx->active_thread_type = 0;
748 avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
750 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
751 pthread_mutex_init(&fctx->buffer_mutex, NULL);
754 for (i = 0; i < thread_count; i++) {
755 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
756 PerThreadContext *p = &fctx->threads[i];
758 pthread_mutex_init(&p->mutex, NULL);
759 pthread_mutex_init(&p->progress_mutex, NULL);
760 pthread_cond_init(&p->input_cond, NULL);
761 pthread_cond_init(&p->progress_cond, NULL);
762 pthread_cond_init(&p->output_cond, NULL);
768 err = AVERROR(ENOMEM);
773 copy->thread_opaque = p;
774 copy->pkt = &p->avpkt;
780 err = codec->init(copy);
782 update_context_from_thread(avctx, copy, 1);
784 copy->priv_data = av_malloc(codec->priv_data_size);
785 if (!copy->priv_data) {
786 err = AVERROR(ENOMEM);
789 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
790 copy->internal = av_malloc(sizeof(AVCodecInternal));
791 if (!copy->internal) {
792 err = AVERROR(ENOMEM);
795 *(copy->internal) = *(src->internal);
796 copy->internal->is_copy = 1;
798 if (codec->init_thread_copy)
799 err = codec->init_thread_copy(copy);
804 if (!pthread_create(&p->thread, NULL, frame_worker_thread, p))
811 frame_thread_free(avctx, i+1);
816 void ff_thread_flush(AVCodecContext *avctx)
818 FrameThreadContext *fctx = avctx->thread_opaque;
820 if (!avctx->thread_opaque) return;
822 park_frame_worker_threads(fctx, avctx->thread_count);
823 if (fctx->prev_thread) {
824 if (fctx->prev_thread != &fctx->threads[0])
825 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
826 if (avctx->codec->flush)
827 avctx->codec->flush(fctx->threads[0].avctx);
830 fctx->next_decoding = fctx->next_finished = 0;
832 fctx->prev_thread = NULL;
835 static int *allocate_progress(PerThreadContext *p)
839 for (i = 0; i < MAX_BUFFERS; i++)
840 if (!p->progress_used[i]) break;
842 if (i == MAX_BUFFERS) {
843 av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n");
847 p->progress_used[i] = 1;
849 return p->progress[i];
852 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
854 PerThreadContext *p = avctx->thread_opaque;
859 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
860 f->thread_opaque = NULL;
861 return avctx->get_buffer(avctx, f);
864 if (p->state != STATE_SETTING_UP &&
865 (avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) {
866 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
870 pthread_mutex_lock(&p->parent->buffer_mutex);
871 f->thread_opaque = progress = allocate_progress(p);
874 pthread_mutex_unlock(&p->parent->buffer_mutex);
881 if (avctx->thread_safe_callbacks ||
882 avctx->get_buffer == avcodec_default_get_buffer) {
883 err = avctx->get_buffer(avctx, f);
885 p->requested_frame = f;
886 p->state = STATE_GET_BUFFER;
887 pthread_mutex_lock(&p->progress_mutex);
888 pthread_cond_signal(&p->progress_cond);
890 while (p->state != STATE_SETTING_UP)
891 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
895 pthread_mutex_unlock(&p->progress_mutex);
897 if (!avctx->codec->update_thread_context)
898 ff_thread_finish_setup(avctx);
901 pthread_mutex_unlock(&p->parent->buffer_mutex);
906 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
908 PerThreadContext *p = avctx->thread_opaque;
909 FrameThreadContext *fctx;
911 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
912 avctx->release_buffer(avctx, f);
916 if (p->num_released_buffers >= MAX_BUFFERS) {
917 av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n");
921 if(avctx->debug & FF_DEBUG_BUFFERS)
922 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
925 pthread_mutex_lock(&fctx->buffer_mutex);
926 p->released_buffers[p->num_released_buffers++] = *f;
927 pthread_mutex_unlock(&fctx->buffer_mutex);
928 memset(f->data, 0, sizeof(f->data));
932 * Set the threading algorithms used.
934 * Threading requires more than one thread.
935 * Frame threading requires entire frames to be passed to the codec,
936 * and introduces extra decoding delay, so is incompatible with low_delay.
938 * @param avctx The context.
940 static void validate_thread_parameters(AVCodecContext *avctx)
942 int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
943 && !(avctx->flags & CODEC_FLAG_TRUNCATED)
944 && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
945 && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
946 if (avctx->thread_count == 1) {
947 avctx->active_thread_type = 0;
948 } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
949 avctx->active_thread_type = FF_THREAD_FRAME;
950 } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
951 avctx->thread_type & FF_THREAD_SLICE) {
952 avctx->active_thread_type = FF_THREAD_SLICE;
956 int ff_thread_init(AVCodecContext *avctx)
958 if (avctx->thread_opaque) {
959 av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
968 validate_thread_parameters(avctx);
970 if (avctx->active_thread_type&FF_THREAD_SLICE)
971 return thread_init(avctx);
972 else if (avctx->active_thread_type&FF_THREAD_FRAME)
973 return frame_thread_init(avctx);
979 void ff_thread_free(AVCodecContext *avctx)
981 if (avctx->active_thread_type&FF_THREAD_FRAME)
982 frame_thread_free(avctx, avctx->thread_count);