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 FFmpeg.
11 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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
38 #if HAVE_GETSYSTEMINFO
43 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/param.h>
47 #include <sys/sysctl.h>
60 #include "w32pthreads.h"
62 #include "os2threads.h"
65 typedef int (action_func)(AVCodecContext *c, void *arg);
66 typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
68 typedef struct ThreadContext {
78 pthread_cond_t last_job_cond;
79 pthread_cond_t current_job_cond;
80 pthread_mutex_t current_job_lock;
85 /// Max number of frame buffers that can be allocated when using frame threads.
86 #define MAX_BUFFERS (32+1)
89 * Context used by codec threads and stored in their AVCodecContext thread_opaque.
91 typedef struct PerThreadContext {
92 struct FrameThreadContext *parent;
96 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
97 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
98 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
100 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
101 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
103 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
105 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
106 int allocated_buf_size; ///< Size allocated for avpkt.data
108 AVFrame frame; ///< Output frame (for decoding) or input (for encoding).
109 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
110 int result; ///< The result of the last codec decode/encode() call.
113 STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
114 STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
115 STATE_GET_BUFFER, /**<
116 * Set when the codec calls get_buffer().
117 * State is returned to STATE_SETTING_UP afterwards.
119 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
123 * Array of frames passed to ff_thread_release_buffer().
124 * Frames are released after all threads referencing them are finished.
126 AVFrame released_buffers[MAX_BUFFERS];
127 int num_released_buffers;
130 * Array of progress values used by ff_thread_get_buffer().
132 int progress[MAX_BUFFERS][2];
133 uint8_t progress_used[MAX_BUFFERS];
135 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
139 * Context stored in the client AVCodecContext thread_opaque.
141 typedef struct FrameThreadContext {
142 PerThreadContext *threads; ///< The contexts for each thread.
143 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
145 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
147 int next_decoding; ///< The next context to submit a packet to.
148 int next_finished; ///< The next context to return output from.
151 * Set for the first N packets, where N is the number of threads.
152 * While it is set, ff_thread_en/decode_frame won't return any results.
155 int die; ///< Set when threads should exit.
156 } FrameThreadContext;
159 /* H264 slice threading seems to be buggy with more than 16 threads,
160 * limit the number of threads to 16 for automatic detection */
161 #define MAX_AUTO_THREADS 16
163 static int get_logical_cpus(AVCodecContext *avctx)
165 int ret, nb_cpus = 1;
166 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
171 ret = sched_getaffinity(0, sizeof(cpuset), &cpuset);
173 nb_cpus = CPU_COUNT(&cpuset);
175 #elif HAVE_GETSYSTEMINFO
177 GetSystemInfo(&sysinfo);
178 nb_cpus = sysinfo.dwNumberOfProcessors;
179 #elif HAVE_SYSCTL && defined(HW_NCPU)
180 int mib[2] = { CTL_HW, HW_NCPU };
181 size_t len = sizeof(nb_cpus);
183 ret = sysctl(mib, 2, &nb_cpus, &len, NULL, 0);
186 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
187 nb_cpus = sysconf(_SC_NPROC_ONLN);
188 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
189 nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
191 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
194 nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
196 return FFMIN(nb_cpus, MAX_AUTO_THREADS);
200 static void* attribute_align_arg worker(void *v)
202 AVCodecContext *avctx = v;
203 ThreadContext *c = avctx->thread_opaque;
204 int our_job = c->job_count;
205 int thread_count = avctx->thread_count;
208 pthread_mutex_lock(&c->current_job_lock);
209 self_id = c->current_job++;
211 while (our_job >= c->job_count) {
212 if (c->current_job == thread_count + c->job_count)
213 pthread_cond_signal(&c->last_job_cond);
215 pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
219 pthread_mutex_unlock(&c->current_job_lock);
223 pthread_mutex_unlock(&c->current_job_lock);
225 c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
226 c->func2(avctx, c->args, our_job, self_id);
228 pthread_mutex_lock(&c->current_job_lock);
229 our_job = c->current_job++;
233 static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count)
235 pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
236 pthread_mutex_unlock(&c->current_job_lock);
239 static void thread_free(AVCodecContext *avctx)
241 ThreadContext *c = avctx->thread_opaque;
244 pthread_mutex_lock(&c->current_job_lock);
246 pthread_cond_broadcast(&c->current_job_cond);
247 pthread_mutex_unlock(&c->current_job_lock);
249 for (i=0; i<avctx->thread_count; i++)
250 pthread_join(c->workers[i], NULL);
252 pthread_mutex_destroy(&c->current_job_lock);
253 pthread_cond_destroy(&c->current_job_cond);
254 pthread_cond_destroy(&c->last_job_cond);
256 av_freep(&avctx->thread_opaque);
259 static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
261 ThreadContext *c= avctx->thread_opaque;
264 if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
265 return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
270 pthread_mutex_lock(&c->current_job_lock);
272 c->current_job = avctx->thread_count;
273 c->job_count = job_count;
274 c->job_size = job_size;
279 c->rets_count = job_count;
281 c->rets = &dummy_ret;
284 pthread_cond_broadcast(&c->current_job_cond);
286 avcodec_thread_park_workers(c, avctx->thread_count);
291 static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
293 ThreadContext *c= avctx->thread_opaque;
295 return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
298 static int thread_init(AVCodecContext *avctx)
302 int thread_count = avctx->thread_count;
305 int nb_cpus = get_logical_cpus(avctx);
306 // use number of cores + 1 as thread count if there is motre than one
308 thread_count = avctx->thread_count = nb_cpus + 1;
311 if (thread_count <= 1) {
312 avctx->active_thread_type = 0;
316 c = av_mallocz(sizeof(ThreadContext));
320 c->workers = av_mallocz(sizeof(pthread_t)*thread_count);
326 avctx->thread_opaque = c;
331 pthread_cond_init(&c->current_job_cond, NULL);
332 pthread_cond_init(&c->last_job_cond, NULL);
333 pthread_mutex_init(&c->current_job_lock, NULL);
334 pthread_mutex_lock(&c->current_job_lock);
335 for (i=0; i<thread_count; i++) {
336 if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
337 avctx->thread_count = i;
338 pthread_mutex_unlock(&c->current_job_lock);
339 ff_thread_free(avctx);
344 avcodec_thread_park_workers(c, thread_count);
346 avctx->execute = avcodec_thread_execute;
347 avctx->execute2 = avcodec_thread_execute2;
352 * Codec worker thread.
354 * Automatically calls ff_thread_finish_setup() if the codec does
355 * not provide an update_thread_context method, or if the codec returns
358 static attribute_align_arg void *frame_worker_thread(void *arg)
360 PerThreadContext *p = arg;
361 FrameThreadContext *fctx = p->parent;
362 AVCodecContext *avctx = p->avctx;
363 AVCodec *codec = avctx->codec;
366 if (p->state == STATE_INPUT_READY && !fctx->die) {
367 pthread_mutex_lock(&p->mutex);
368 while (p->state == STATE_INPUT_READY && !fctx->die)
369 pthread_cond_wait(&p->input_cond, &p->mutex);
370 pthread_mutex_unlock(&p->mutex);
373 if (fctx->die) break;
375 if (!codec->update_thread_context && (avctx->thread_safe_callbacks || avctx->get_buffer == avcodec_default_get_buffer))
376 ff_thread_finish_setup(avctx);
378 pthread_mutex_lock(&p->mutex);
379 avcodec_get_frame_defaults(&p->frame);
381 p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
383 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
385 p->state = STATE_INPUT_READY;
387 pthread_mutex_lock(&p->progress_mutex);
388 pthread_cond_signal(&p->output_cond);
389 pthread_mutex_unlock(&p->progress_mutex);
391 pthread_mutex_unlock(&p->mutex);
398 * Update the next thread's AVCodecContext with values from the reference thread's context.
400 * @param dst The destination context.
401 * @param src The source context.
402 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
404 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
409 dst->sub_id = src->sub_id;
410 dst->time_base = src->time_base;
411 dst->width = src->width;
412 dst->height = src->height;
413 dst->pix_fmt = src->pix_fmt;
415 dst->coded_width = src->coded_width;
416 dst->coded_height = src->coded_height;
418 dst->has_b_frames = src->has_b_frames;
419 dst->idct_algo = src->idct_algo;
420 dst->slice_count = src->slice_count;
422 dst->bits_per_coded_sample = src->bits_per_coded_sample;
423 dst->sample_aspect_ratio = src->sample_aspect_ratio;
424 dst->dtg_active_format = src->dtg_active_format;
426 dst->profile = src->profile;
427 dst->level = src->level;
429 dst->bits_per_raw_sample = src->bits_per_raw_sample;
430 dst->ticks_per_frame = src->ticks_per_frame;
431 dst->color_primaries = src->color_primaries;
433 dst->color_trc = src->color_trc;
434 dst->colorspace = src->colorspace;
435 dst->color_range = src->color_range;
436 dst->chroma_sample_location = src->chroma_sample_location;
440 dst->delay = src->thread_count - 1;
441 dst->coded_frame = src->coded_frame;
443 if (dst->codec->update_thread_context)
444 err = dst->codec->update_thread_context(dst, src);
451 * Update the next thread's AVCodecContext with values set by the user.
453 * @param dst The destination context.
454 * @param src The source context.
456 static void update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
458 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
459 dst->flags = src->flags;
461 dst->draw_horiz_band= src->draw_horiz_band;
462 dst->get_buffer = src->get_buffer;
463 dst->release_buffer = src->release_buffer;
465 dst->opaque = src->opaque;
466 dst->dsp_mask = src->dsp_mask;
467 dst->debug = src->debug;
468 dst->debug_mv = src->debug_mv;
470 dst->slice_flags = src->slice_flags;
471 dst->flags2 = src->flags2;
473 copy_fields(skip_loop_filter, bidir_refine);
475 dst->frame_number = src->frame_number;
476 dst->reordered_opaque = src->reordered_opaque;
477 dst->thread_safe_callbacks = src->thread_safe_callbacks;
481 static void free_progress(AVFrame *f)
483 PerThreadContext *p = f->owner->thread_opaque;
484 int *progress = f->thread_opaque;
486 p->progress_used[(progress - p->progress[0]) / 2] = 0;
489 /// Releases the buffers that this decoding thread was the last user of.
490 static void release_delayed_buffers(PerThreadContext *p)
492 FrameThreadContext *fctx = p->parent;
494 while (p->num_released_buffers > 0) {
497 pthread_mutex_lock(&fctx->buffer_mutex);
498 f = &p->released_buffers[--p->num_released_buffers];
500 f->thread_opaque = NULL;
502 f->owner->release_buffer(f->owner, f);
503 pthread_mutex_unlock(&fctx->buffer_mutex);
507 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
509 FrameThreadContext *fctx = p->parent;
510 PerThreadContext *prev_thread = fctx->prev_thread;
511 AVCodec *codec = p->avctx->codec;
512 uint8_t *buf = p->avpkt.data;
514 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
516 pthread_mutex_lock(&p->mutex);
518 release_delayed_buffers(p);
522 if (prev_thread->state == STATE_SETTING_UP) {
523 pthread_mutex_lock(&prev_thread->progress_mutex);
524 while (prev_thread->state == STATE_SETTING_UP)
525 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
526 pthread_mutex_unlock(&prev_thread->progress_mutex);
529 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
531 pthread_mutex_unlock(&p->mutex);
536 av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
539 memcpy(buf, avpkt->data, avpkt->size);
540 memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
542 p->state = STATE_SETTING_UP;
543 pthread_cond_signal(&p->input_cond);
544 pthread_mutex_unlock(&p->mutex);
547 * If the client doesn't have a thread-safe get_buffer(),
548 * then decoding threads call back to the main thread,
549 * and it calls back to the client here.
552 if (!p->avctx->thread_safe_callbacks &&
553 p->avctx->get_buffer != avcodec_default_get_buffer) {
554 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
555 pthread_mutex_lock(&p->progress_mutex);
556 while (p->state == STATE_SETTING_UP)
557 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
559 if (p->state == STATE_GET_BUFFER) {
560 p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
561 p->state = STATE_SETTING_UP;
562 pthread_cond_signal(&p->progress_cond);
564 pthread_mutex_unlock(&p->progress_mutex);
568 fctx->prev_thread = p;
569 fctx->next_decoding++;
574 int ff_thread_decode_frame(AVCodecContext *avctx,
575 AVFrame *picture, int *got_picture_ptr,
578 FrameThreadContext *fctx = avctx->thread_opaque;
579 int finished = fctx->next_finished;
584 * Submit a packet to the next decoding thread.
587 p = &fctx->threads[fctx->next_decoding];
588 update_context_from_user(p->avctx, avctx);
589 err = submit_packet(p, avpkt);
593 * If we're still receiving the initial packets, don't return a frame.
596 if (fctx->delaying && avpkt->size) {
597 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
604 * Return the next available frame from the oldest thread.
605 * If we're at the end of the stream, then we have to skip threads that
606 * didn't output a frame, because we don't want to accidentally signal
607 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
611 p = &fctx->threads[finished++];
613 if (p->state != STATE_INPUT_READY) {
614 pthread_mutex_lock(&p->progress_mutex);
615 while (p->state != STATE_INPUT_READY)
616 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
617 pthread_mutex_unlock(&p->progress_mutex);
621 *got_picture_ptr = p->got_frame;
622 picture->pkt_dts = p->avpkt.dts;
623 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
624 picture->width = avctx->width;
625 picture->height = avctx->height;
626 picture->format = avctx->pix_fmt;
629 * A later call with avkpt->size == 0 may loop over all threads,
630 * including this one, searching for a frame to return before being
631 * stopped by the "finished != fctx->next_finished" condition.
632 * Make sure we don't mistakenly return the same frame again.
636 if (finished >= avctx->thread_count) finished = 0;
637 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
639 update_context_from_thread(avctx, p->avctx, 1);
641 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
643 fctx->next_finished = finished;
645 /* return the size of the consumed packet if no error occurred */
646 return (p->result >= 0) ? avpkt->size : p->result;
649 void ff_thread_report_progress(AVFrame *f, int n, int field)
652 int *progress = f->thread_opaque;
654 if (!progress || progress[field] >= n) return;
656 p = f->owner->thread_opaque;
658 if (f->owner->debug&FF_DEBUG_THREADS)
659 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
661 pthread_mutex_lock(&p->progress_mutex);
663 pthread_cond_broadcast(&p->progress_cond);
664 pthread_mutex_unlock(&p->progress_mutex);
667 void ff_thread_await_progress(AVFrame *f, int n, int field)
670 int *progress = f->thread_opaque;
672 if (!progress || progress[field] >= n) return;
674 p = f->owner->thread_opaque;
676 if (f->owner->debug&FF_DEBUG_THREADS)
677 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
679 pthread_mutex_lock(&p->progress_mutex);
680 while (progress[field] < n)
681 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
682 pthread_mutex_unlock(&p->progress_mutex);
685 void ff_thread_finish_setup(AVCodecContext *avctx) {
686 PerThreadContext *p = avctx->thread_opaque;
688 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
690 if(p->state == STATE_SETUP_FINISHED){
691 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
694 pthread_mutex_lock(&p->progress_mutex);
695 p->state = STATE_SETUP_FINISHED;
696 pthread_cond_broadcast(&p->progress_cond);
697 pthread_mutex_unlock(&p->progress_mutex);
700 /// Waits for all threads to finish.
701 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
705 for (i = 0; i < thread_count; i++) {
706 PerThreadContext *p = &fctx->threads[i];
708 if (p->state != STATE_INPUT_READY) {
709 pthread_mutex_lock(&p->progress_mutex);
710 while (p->state != STATE_INPUT_READY)
711 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
712 pthread_mutex_unlock(&p->progress_mutex);
717 static void frame_thread_free(AVCodecContext *avctx, int thread_count)
719 FrameThreadContext *fctx = avctx->thread_opaque;
720 AVCodec *codec = avctx->codec;
723 park_frame_worker_threads(fctx, thread_count);
725 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
726 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
730 for (i = 0; i < thread_count; i++) {
731 PerThreadContext *p = &fctx->threads[i];
733 pthread_mutex_lock(&p->mutex);
734 pthread_cond_signal(&p->input_cond);
735 pthread_mutex_unlock(&p->mutex);
738 pthread_join(p->thread, NULL);
742 codec->close(p->avctx);
746 release_delayed_buffers(p);
749 for (i = 0; i < thread_count; i++) {
750 PerThreadContext *p = &fctx->threads[i];
752 avcodec_default_free_buffers(p->avctx);
754 pthread_mutex_destroy(&p->mutex);
755 pthread_mutex_destroy(&p->progress_mutex);
756 pthread_cond_destroy(&p->input_cond);
757 pthread_cond_destroy(&p->progress_cond);
758 pthread_cond_destroy(&p->output_cond);
759 av_freep(&p->avpkt.data);
762 av_freep(&p->avctx->priv_data);
763 av_freep(&p->avctx->internal);
769 av_freep(&fctx->threads);
770 pthread_mutex_destroy(&fctx->buffer_mutex);
771 av_freep(&avctx->thread_opaque);
774 static int frame_thread_init(AVCodecContext *avctx)
776 int thread_count = avctx->thread_count;
777 AVCodec *codec = avctx->codec;
778 AVCodecContext *src = avctx;
779 FrameThreadContext *fctx;
783 int nb_cpus = get_logical_cpus(avctx);
784 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
786 // use number of cores + 1 as thread count if there is motre than one
788 thread_count = avctx->thread_count = nb_cpus + 1;
791 if (thread_count <= 1) {
792 avctx->active_thread_type = 0;
796 avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
798 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
799 pthread_mutex_init(&fctx->buffer_mutex, NULL);
802 for (i = 0; i < thread_count; i++) {
803 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
804 PerThreadContext *p = &fctx->threads[i];
806 pthread_mutex_init(&p->mutex, NULL);
807 pthread_mutex_init(&p->progress_mutex, NULL);
808 pthread_cond_init(&p->input_cond, NULL);
809 pthread_cond_init(&p->progress_cond, NULL);
810 pthread_cond_init(&p->output_cond, NULL);
816 err = AVERROR(ENOMEM);
821 copy->thread_opaque = p;
822 copy->pkt = &p->avpkt;
828 err = codec->init(copy);
830 update_context_from_thread(avctx, copy, 1);
832 copy->priv_data = av_malloc(codec->priv_data_size);
833 if (!copy->priv_data) {
834 err = AVERROR(ENOMEM);
837 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
838 copy->internal = av_malloc(sizeof(AVCodecInternal));
839 if (!copy->internal) {
840 err = AVERROR(ENOMEM);
843 *(copy->internal) = *(src->internal);
844 copy->internal->is_copy = 1;
846 if (codec->init_thread_copy)
847 err = codec->init_thread_copy(copy);
852 p->thread_init= !pthread_create(&p->thread, NULL, frame_worker_thread, p);
860 frame_thread_free(avctx, i+1);
865 void ff_thread_flush(AVCodecContext *avctx)
867 FrameThreadContext *fctx = avctx->thread_opaque;
869 if (!avctx->thread_opaque) return;
871 park_frame_worker_threads(fctx, avctx->thread_count);
872 if (fctx->prev_thread) {
873 if (fctx->prev_thread != &fctx->threads[0])
874 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
875 if (avctx->codec->flush)
876 avctx->codec->flush(fctx->threads[0].avctx);
879 fctx->next_decoding = fctx->next_finished = 0;
881 fctx->prev_thread = NULL;
884 static int *allocate_progress(PerThreadContext *p)
888 for (i = 0; i < MAX_BUFFERS; i++)
889 if (!p->progress_used[i]) break;
891 if (i == MAX_BUFFERS) {
892 av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n");
896 p->progress_used[i] = 1;
898 return p->progress[i];
901 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
903 PerThreadContext *p = avctx->thread_opaque;
908 ff_init_buffer_info(avctx, f);
910 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
911 f->thread_opaque = NULL;
912 return avctx->get_buffer(avctx, f);
915 if (p->state != STATE_SETTING_UP &&
916 (avctx->codec->update_thread_context || (!avctx->thread_safe_callbacks &&
917 avctx->get_buffer != avcodec_default_get_buffer))) {
918 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
922 pthread_mutex_lock(&p->parent->buffer_mutex);
923 f->thread_opaque = progress = allocate_progress(p);
926 pthread_mutex_unlock(&p->parent->buffer_mutex);
933 if (avctx->thread_safe_callbacks ||
934 avctx->get_buffer == avcodec_default_get_buffer) {
935 err = avctx->get_buffer(avctx, f);
937 p->requested_frame = f;
938 p->state = STATE_GET_BUFFER;
939 pthread_mutex_lock(&p->progress_mutex);
940 pthread_cond_signal(&p->progress_cond);
942 while (p->state != STATE_SETTING_UP)
943 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
947 pthread_mutex_unlock(&p->progress_mutex);
949 if (!avctx->codec->update_thread_context)
950 ff_thread_finish_setup(avctx);
953 pthread_mutex_unlock(&p->parent->buffer_mutex);
958 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
960 PerThreadContext *p = avctx->thread_opaque;
961 FrameThreadContext *fctx;
963 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
964 avctx->release_buffer(avctx, f);
968 if (p->num_released_buffers >= MAX_BUFFERS) {
969 av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n");
973 if(avctx->debug & FF_DEBUG_BUFFERS)
974 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
977 pthread_mutex_lock(&fctx->buffer_mutex);
978 p->released_buffers[p->num_released_buffers++] = *f;
979 pthread_mutex_unlock(&fctx->buffer_mutex);
980 memset(f->data, 0, sizeof(f->data));
984 * Set the threading algorithms used.
986 * Threading requires more than one thread.
987 * Frame threading requires entire frames to be passed to the codec,
988 * and introduces extra decoding delay, so is incompatible with low_delay.
990 * @param avctx The context.
992 static void validate_thread_parameters(AVCodecContext *avctx)
994 int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
995 && !(avctx->flags & CODEC_FLAG_TRUNCATED)
996 && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
997 && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
998 if (avctx->thread_count == 1) {
999 avctx->active_thread_type = 0;
1000 } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
1001 avctx->active_thread_type = FF_THREAD_FRAME;
1002 } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
1003 avctx->thread_type & FF_THREAD_SLICE) {
1004 avctx->active_thread_type = FF_THREAD_SLICE;
1008 int ff_thread_init(AVCodecContext *avctx)
1010 if (avctx->thread_opaque) {
1011 av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
1020 validate_thread_parameters(avctx);
1022 if (avctx->active_thread_type&FF_THREAD_SLICE)
1023 return thread_init(avctx);
1024 else if (avctx->active_thread_type&FF_THREAD_FRAME)
1025 return frame_thread_init(avctx);
1031 void ff_thread_free(AVCodecContext *avctx)
1033 if (avctx->active_thread_type&FF_THREAD_FRAME)
1034 frame_thread_free(avctx, avctx->thread_count);