pthread_frame: flush all threads on flush, not just the first one
[libav.git] / libavcodec / pthread_frame.c
CommitLineData
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1/*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
20 * @file
21 * Frame multithreading support functions
22 * @see doc/multithreading.txt
23 */
24
25#include "config.h"
26
27#include <stdint.h>
28
29#if HAVE_PTHREADS
30#include <pthread.h>
31#elif HAVE_W32THREADS
32#include "compat/w32pthreads.h"
33#endif
34
35#include "avcodec.h"
36#include "internal.h"
37#include "pthread_internal.h"
38#include "thread.h"
39
40#include "libavutil/avassert.h"
41#include "libavutil/buffer.h"
42#include "libavutil/common.h"
43#include "libavutil/cpu.h"
44#include "libavutil/frame.h"
45#include "libavutil/log.h"
46#include "libavutil/mem.h"
47
48/**
38ecc370 49 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
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50 */
51typedef struct PerThreadContext {
52 struct FrameThreadContext *parent;
53
54 pthread_t thread;
55 int thread_init;
56 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
57 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
58 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
59
60 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
61 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
62
63 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
64
65 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
66 uint8_t *buf; ///< backup storage for packet data when the input packet is not refcounted
67 int allocated_buf_size; ///< Size allocated for buf
68
d351ef47 69 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
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70 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
71 int result; ///< The result of the last codec decode/encode() call.
72
73 enum {
74 STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
75 STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
76 STATE_GET_BUFFER, /**<
77 * Set when the codec calls get_buffer().
78 * State is returned to STATE_SETTING_UP afterwards.
79 */
80 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
81 } state;
82
83 /**
84 * Array of frames passed to ff_thread_release_buffer().
85 * Frames are released after all threads referencing them are finished.
86 */
87 AVFrame *released_buffers;
88 int num_released_buffers;
89 int released_buffers_allocated;
90
91 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
92 int requested_flags; ///< flags passed to get_buffer() for requested_frame
93} PerThreadContext;
94
95/**
38ecc370 96 * Context stored in the client AVCodecInternal thread_ctx.
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97 */
98typedef struct FrameThreadContext {
99 PerThreadContext *threads; ///< The contexts for each thread.
100 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
101
102 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
103
104 int next_decoding; ///< The next context to submit a packet to.
105 int next_finished; ///< The next context to return output from.
106
107 int delaying; /**<
108 * Set for the first N packets, where N is the number of threads.
109 * While it is set, ff_thread_en/decode_frame won't return any results.
110 */
111
112 int die; ///< Set when threads should exit.
113} FrameThreadContext;
114
115/**
116 * Codec worker thread.
117 *
118 * Automatically calls ff_thread_finish_setup() if the codec does
119 * not provide an update_thread_context method, or if the codec returns
120 * before calling it.
121 */
122static attribute_align_arg void *frame_worker_thread(void *arg)
123{
124 PerThreadContext *p = arg;
125 FrameThreadContext *fctx = p->parent;
126 AVCodecContext *avctx = p->avctx;
127 const AVCodec *codec = avctx->codec;
128
129 while (1) {
130 if (p->state == STATE_INPUT_READY && !fctx->die) {
131 pthread_mutex_lock(&p->mutex);
132 while (p->state == STATE_INPUT_READY && !fctx->die)
133 pthread_cond_wait(&p->input_cond, &p->mutex);
134 pthread_mutex_unlock(&p->mutex);
135 }
136
137 if (fctx->die) break;
138
139 if (!codec->update_thread_context && avctx->thread_safe_callbacks)
140 ff_thread_finish_setup(avctx);
141
142 pthread_mutex_lock(&p->mutex);
d351ef47 143 av_frame_unref(p->frame);
cc14ee03 144 p->got_frame = 0;
d351ef47 145 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
cc14ee03 146
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147 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
148 if (avctx->internal->allocate_progress)
149 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
150 "free the frame on failure. This is a bug, please report it.\n");
151 av_frame_unref(p->frame);
152 }
153
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154 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
155
156 p->state = STATE_INPUT_READY;
157
158 pthread_mutex_lock(&p->progress_mutex);
159 pthread_cond_signal(&p->output_cond);
160 pthread_mutex_unlock(&p->progress_mutex);
161
162 pthread_mutex_unlock(&p->mutex);
163 }
164
165 return NULL;
166}
167
168/**
169 * Update the next thread's AVCodecContext with values from the reference thread's context.
170 *
171 * @param dst The destination context.
172 * @param src The source context.
173 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
174 */
175static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
176{
177 int err = 0;
178
179 if (dst != src) {
180 dst->time_base = src->time_base;
181 dst->width = src->width;
182 dst->height = src->height;
183 dst->pix_fmt = src->pix_fmt;
184
185 dst->coded_width = src->coded_width;
186 dst->coded_height = src->coded_height;
187
188 dst->has_b_frames = src->has_b_frames;
189 dst->idct_algo = src->idct_algo;
190
191 dst->bits_per_coded_sample = src->bits_per_coded_sample;
192 dst->sample_aspect_ratio = src->sample_aspect_ratio;
193 dst->dtg_active_format = src->dtg_active_format;
194
195 dst->profile = src->profile;
196 dst->level = src->level;
197
198 dst->bits_per_raw_sample = src->bits_per_raw_sample;
199 dst->ticks_per_frame = src->ticks_per_frame;
200 dst->color_primaries = src->color_primaries;
201
202 dst->color_trc = src->color_trc;
203 dst->colorspace = src->colorspace;
204 dst->color_range = src->color_range;
205 dst->chroma_sample_location = src->chroma_sample_location;
206
207 dst->hwaccel = src->hwaccel;
208 dst->hwaccel_context = src->hwaccel_context;
209 }
210
211 if (for_user) {
212 dst->coded_frame = src->coded_frame;
213 } else {
214 if (dst->codec->update_thread_context)
215 err = dst->codec->update_thread_context(dst, src);
216 }
217
218 return err;
219}
220
221/**
222 * Update the next thread's AVCodecContext with values set by the user.
223 *
224 * @param dst The destination context.
225 * @param src The source context.
226 * @return 0 on success, negative error code on failure
227 */
228static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
229{
230#define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
231 dst->flags = src->flags;
232
233 dst->draw_horiz_band= src->draw_horiz_band;
234 dst->get_buffer2 = src->get_buffer2;
235#if FF_API_GET_BUFFER
236FF_DISABLE_DEPRECATION_WARNINGS
237 dst->get_buffer = src->get_buffer;
238 dst->release_buffer = src->release_buffer;
239FF_ENABLE_DEPRECATION_WARNINGS
240#endif
241
242 dst->opaque = src->opaque;
243 dst->debug = src->debug;
244
245 dst->slice_flags = src->slice_flags;
246 dst->flags2 = src->flags2;
247
248 copy_fields(skip_loop_filter, subtitle_header);
249
250 dst->frame_number = src->frame_number;
251 dst->reordered_opaque = src->reordered_opaque;
252
253 if (src->slice_count && src->slice_offset) {
254 if (dst->slice_count < src->slice_count) {
255 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
256 sizeof(*dst->slice_offset));
257 if (!tmp) {
258 av_free(dst->slice_offset);
259 return AVERROR(ENOMEM);
260 }
261 dst->slice_offset = tmp;
262 }
263 memcpy(dst->slice_offset, src->slice_offset,
264 src->slice_count * sizeof(*dst->slice_offset));
265 }
266 dst->slice_count = src->slice_count;
267 return 0;
268#undef copy_fields
269}
270
271/// Releases the buffers that this decoding thread was the last user of.
272static void release_delayed_buffers(PerThreadContext *p)
273{
274 FrameThreadContext *fctx = p->parent;
275
276 while (p->num_released_buffers > 0) {
277 AVFrame *f;
278
279 pthread_mutex_lock(&fctx->buffer_mutex);
280
281 // fix extended data in case the caller screwed it up
282 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO);
283 f = &p->released_buffers[--p->num_released_buffers];
284 f->extended_data = f->data;
285 av_frame_unref(f);
286
287 pthread_mutex_unlock(&fctx->buffer_mutex);
288 }
289}
290
291static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
292{
293 FrameThreadContext *fctx = p->parent;
294 PerThreadContext *prev_thread = fctx->prev_thread;
295 const AVCodec *codec = p->avctx->codec;
296
297 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
298
299 pthread_mutex_lock(&p->mutex);
300
301 release_delayed_buffers(p);
302
303 if (prev_thread) {
304 int err;
305 if (prev_thread->state == STATE_SETTING_UP) {
306 pthread_mutex_lock(&prev_thread->progress_mutex);
307 while (prev_thread->state == STATE_SETTING_UP)
308 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
309 pthread_mutex_unlock(&prev_thread->progress_mutex);
310 }
311
312 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
313 if (err) {
314 pthread_mutex_unlock(&p->mutex);
315 return err;
316 }
317 }
318
319 av_buffer_unref(&p->avpkt.buf);
320 p->avpkt = *avpkt;
321 if (avpkt->buf)
322 p->avpkt.buf = av_buffer_ref(avpkt->buf);
323 else {
324 av_fast_malloc(&p->buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
325 p->avpkt.data = p->buf;
326 memcpy(p->buf, avpkt->data, avpkt->size);
327 memset(p->buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
328 }
329
330 p->state = STATE_SETTING_UP;
331 pthread_cond_signal(&p->input_cond);
332 pthread_mutex_unlock(&p->mutex);
333
334 /*
335 * If the client doesn't have a thread-safe get_buffer(),
336 * then decoding threads call back to the main thread,
337 * and it calls back to the client here.
338 */
339
340FF_DISABLE_DEPRECATION_WARNINGS
341 if (!p->avctx->thread_safe_callbacks && (
342#if FF_API_GET_BUFFER
343 p->avctx->get_buffer ||
344#endif
345 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
346FF_ENABLE_DEPRECATION_WARNINGS
347 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
348 pthread_mutex_lock(&p->progress_mutex);
349 while (p->state == STATE_SETTING_UP)
350 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
351
352 if (p->state == STATE_GET_BUFFER) {
353 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
354 p->state = STATE_SETTING_UP;
355 pthread_cond_signal(&p->progress_cond);
356 }
357 pthread_mutex_unlock(&p->progress_mutex);
358 }
359 }
360
361 fctx->prev_thread = p;
362 fctx->next_decoding++;
363
364 return 0;
365}
366
367int ff_thread_decode_frame(AVCodecContext *avctx,
368 AVFrame *picture, int *got_picture_ptr,
369 AVPacket *avpkt)
370{
38ecc370 371 FrameThreadContext *fctx = avctx->internal->thread_ctx;
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372 int finished = fctx->next_finished;
373 PerThreadContext *p;
374 int err;
375
376 /*
377 * Submit a packet to the next decoding thread.
378 */
379
380 p = &fctx->threads[fctx->next_decoding];
381 err = update_context_from_user(p->avctx, avctx);
382 if (err) return err;
383 err = submit_packet(p, avpkt);
384 if (err) return err;
385
386 /*
387 * If we're still receiving the initial packets, don't return a frame.
388 */
389
390 if (fctx->delaying) {
391 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
392
393 *got_picture_ptr=0;
394 if (avpkt->size)
395 return avpkt->size;
396 }
397
398 /*
399 * Return the next available frame from the oldest thread.
400 * If we're at the end of the stream, then we have to skip threads that
401 * didn't output a frame, because we don't want to accidentally signal
402 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
403 */
404
405 do {
406 p = &fctx->threads[finished++];
407
408 if (p->state != STATE_INPUT_READY) {
409 pthread_mutex_lock(&p->progress_mutex);
410 while (p->state != STATE_INPUT_READY)
411 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
412 pthread_mutex_unlock(&p->progress_mutex);
413 }
414
d351ef47 415 av_frame_move_ref(picture, p->frame);
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416 *got_picture_ptr = p->got_frame;
417 picture->pkt_dts = p->avpkt.dts;
418
419 /*
420 * A later call with avkpt->size == 0 may loop over all threads,
421 * including this one, searching for a frame to return before being
422 * stopped by the "finished != fctx->next_finished" condition.
423 * Make sure we don't mistakenly return the same frame again.
424 */
425 p->got_frame = 0;
426
427 if (finished >= avctx->thread_count) finished = 0;
428 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
429
430 update_context_from_thread(avctx, p->avctx, 1);
431
432 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
433
434 fctx->next_finished = finished;
435
436 /* return the size of the consumed packet if no error occurred */
437 return (p->result >= 0) ? avpkt->size : p->result;
438}
439
440void ff_thread_report_progress(ThreadFrame *f, int n, int field)
441{
442 PerThreadContext *p;
443 int *progress = f->progress ? (int*)f->progress->data : NULL;
444
445 if (!progress || progress[field] >= n) return;
446
38ecc370 447 p = f->owner->internal->thread_ctx;
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448
449 if (f->owner->debug&FF_DEBUG_THREADS)
450 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
451
452 pthread_mutex_lock(&p->progress_mutex);
453 progress[field] = n;
454 pthread_cond_broadcast(&p->progress_cond);
455 pthread_mutex_unlock(&p->progress_mutex);
456}
457
458void ff_thread_await_progress(ThreadFrame *f, int n, int field)
459{
460 PerThreadContext *p;
461 int *progress = f->progress ? (int*)f->progress->data : NULL;
462
463 if (!progress || progress[field] >= n) return;
464
38ecc370 465 p = f->owner->internal->thread_ctx;
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466
467 if (f->owner->debug&FF_DEBUG_THREADS)
468 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
469
470 pthread_mutex_lock(&p->progress_mutex);
471 while (progress[field] < n)
472 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
473 pthread_mutex_unlock(&p->progress_mutex);
474}
475
476void ff_thread_finish_setup(AVCodecContext *avctx) {
38ecc370 477 PerThreadContext *p = avctx->internal->thread_ctx;
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478
479 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
480
481 pthread_mutex_lock(&p->progress_mutex);
482 p->state = STATE_SETUP_FINISHED;
483 pthread_cond_broadcast(&p->progress_cond);
484 pthread_mutex_unlock(&p->progress_mutex);
485}
486
487/// Waits for all threads to finish.
488static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
489{
490 int i;
491
492 for (i = 0; i < thread_count; i++) {
493 PerThreadContext *p = &fctx->threads[i];
494
495 if (p->state != STATE_INPUT_READY) {
496 pthread_mutex_lock(&p->progress_mutex);
497 while (p->state != STATE_INPUT_READY)
498 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
499 pthread_mutex_unlock(&p->progress_mutex);
500 }
501 }
502}
503
504void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
505{
38ecc370 506 FrameThreadContext *fctx = avctx->internal->thread_ctx;
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507 const AVCodec *codec = avctx->codec;
508 int i;
509
510 park_frame_worker_threads(fctx, thread_count);
511
512 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
513 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
514
515 fctx->die = 1;
516
517 for (i = 0; i < thread_count; i++) {
518 PerThreadContext *p = &fctx->threads[i];
519
520 pthread_mutex_lock(&p->mutex);
521 pthread_cond_signal(&p->input_cond);
522 pthread_mutex_unlock(&p->mutex);
523
524 if (p->thread_init)
525 pthread_join(p->thread, NULL);
526
527 if (codec->close)
528 codec->close(p->avctx);
529
530 avctx->codec = NULL;
531
532 release_delayed_buffers(p);
d351ef47 533 av_frame_free(&p->frame);
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534 }
535
536 for (i = 0; i < thread_count; i++) {
537 PerThreadContext *p = &fctx->threads[i];
538
539 pthread_mutex_destroy(&p->mutex);
540 pthread_mutex_destroy(&p->progress_mutex);
541 pthread_cond_destroy(&p->input_cond);
542 pthread_cond_destroy(&p->progress_cond);
543 pthread_cond_destroy(&p->output_cond);
544 av_buffer_unref(&p->avpkt.buf);
545 av_freep(&p->buf);
546 av_freep(&p->released_buffers);
547
548 if (i) {
549 av_freep(&p->avctx->priv_data);
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550 av_freep(&p->avctx->slice_offset);
551 }
552
38ecc370 553 av_freep(&p->avctx->internal);
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554 av_freep(&p->avctx);
555 }
556
557 av_freep(&fctx->threads);
558 pthread_mutex_destroy(&fctx->buffer_mutex);
38ecc370 559 av_freep(&avctx->internal->thread_ctx);
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560}
561
562int ff_frame_thread_init(AVCodecContext *avctx)
563{
564 int thread_count = avctx->thread_count;
565 const AVCodec *codec = avctx->codec;
566 AVCodecContext *src = avctx;
567 FrameThreadContext *fctx;
568 int i, err = 0;
569
570#if HAVE_W32THREADS
571 w32thread_init();
572#endif
573
574 if (!thread_count) {
575 int nb_cpus = av_cpu_count();
576 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
577 // use number of cores + 1 as thread count if there is more than one
578 if (nb_cpus > 1)
579 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
580 else
581 thread_count = avctx->thread_count = 1;
582 }
583
584 if (thread_count <= 1) {
585 avctx->active_thread_type = 0;
586 return 0;
587 }
588
38ecc370 589 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
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590
591 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
592 pthread_mutex_init(&fctx->buffer_mutex, NULL);
593 fctx->delaying = 1;
594
595 for (i = 0; i < thread_count; i++) {
596 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
597 PerThreadContext *p = &fctx->threads[i];
598
599 pthread_mutex_init(&p->mutex, NULL);
600 pthread_mutex_init(&p->progress_mutex, NULL);
601 pthread_cond_init(&p->input_cond, NULL);
602 pthread_cond_init(&p->progress_cond, NULL);
603 pthread_cond_init(&p->output_cond, NULL);
604
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605 p->frame = av_frame_alloc();
606 if (!p->frame) {
607 err = AVERROR(ENOMEM);
608 goto error;
609 }
610
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611 p->parent = fctx;
612 p->avctx = copy;
613
614 if (!copy) {
615 err = AVERROR(ENOMEM);
616 goto error;
617 }
618
619 *copy = *src;
cc14ee03 620
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621 copy->internal = av_malloc(sizeof(AVCodecInternal));
622 if (!copy->internal) {
623 err = AVERROR(ENOMEM);
624 goto error;
625 }
626 *copy->internal = *src->internal;
627 copy->internal->thread_ctx = p;
da6506c6 628 copy->internal->pkt = &p->avpkt;
38ecc370 629
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630 if (!i) {
631 src = copy;
632
633 if (codec->init)
634 err = codec->init(copy);
635
636 update_context_from_thread(avctx, copy, 1);
637 } else {
638 copy->priv_data = av_malloc(codec->priv_data_size);
639 if (!copy->priv_data) {
640 err = AVERROR(ENOMEM);
641 goto error;
642 }
643 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
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644 copy->internal->is_copy = 1;
645
646 if (codec->init_thread_copy)
647 err = codec->init_thread_copy(copy);
648 }
649
650 if (err) goto error;
651
652 if (!pthread_create(&p->thread, NULL, frame_worker_thread, p))
653 p->thread_init = 1;
654 }
655
656 return 0;
657
658error:
659 ff_frame_thread_free(avctx, i+1);
660
661 return err;
662}
663
664void ff_thread_flush(AVCodecContext *avctx)
665{
666 int i;
38ecc370 667 FrameThreadContext *fctx = avctx->internal->thread_ctx;
cc14ee03 668
38ecc370 669 if (!fctx) return;
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670
671 park_frame_worker_threads(fctx, avctx->thread_count);
672 if (fctx->prev_thread) {
673 if (fctx->prev_thread != &fctx->threads[0])
674 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
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675 }
676
677 fctx->next_decoding = fctx->next_finished = 0;
678 fctx->delaying = 1;
679 fctx->prev_thread = NULL;
680 for (i = 0; i < avctx->thread_count; i++) {
681 PerThreadContext *p = &fctx->threads[i];
682 // Make sure decode flush calls with size=0 won't return old frames
683 p->got_frame = 0;
d351ef47 684 av_frame_unref(p->frame);
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685
686 release_delayed_buffers(p);
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687
688 if (avctx->codec->flush)
689 avctx->codec->flush(p->avctx);
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690 }
691}
692
693int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
694{
38ecc370 695 PerThreadContext *p = avctx->internal->thread_ctx;
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696 int err;
697
698 f->owner = avctx;
699
700 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
701 return ff_get_buffer(avctx, f->f, flags);
702
703 if (p->state != STATE_SETTING_UP &&
704 (avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) {
705 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
706 return -1;
707 }
708
709 if (avctx->internal->allocate_progress) {
710 int *progress;
711 f->progress = av_buffer_alloc(2 * sizeof(int));
712 if (!f->progress) {
713 return AVERROR(ENOMEM);
714 }
715 progress = (int*)f->progress->data;
716
717 progress[0] = progress[1] = -1;
718 }
719
720 pthread_mutex_lock(&p->parent->buffer_mutex);
721FF_DISABLE_DEPRECATION_WARNINGS
722 if (avctx->thread_safe_callbacks || (
723#if FF_API_GET_BUFFER
724 !avctx->get_buffer &&
725#endif
726 avctx->get_buffer2 == avcodec_default_get_buffer2)) {
727FF_ENABLE_DEPRECATION_WARNINGS
728 err = ff_get_buffer(avctx, f->f, flags);
729 } else {
730 p->requested_frame = f->f;
731 p->requested_flags = flags;
732 p->state = STATE_GET_BUFFER;
733 pthread_mutex_lock(&p->progress_mutex);
734 pthread_cond_signal(&p->progress_cond);
735
736 while (p->state != STATE_SETTING_UP)
737 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
738
739 err = p->result;
740
741 pthread_mutex_unlock(&p->progress_mutex);
742
743 }
744 if (!avctx->thread_safe_callbacks && !avctx->codec->update_thread_context)
745 ff_thread_finish_setup(avctx);
746
747 if (err)
748 av_buffer_unref(&f->progress);
749
750 pthread_mutex_unlock(&p->parent->buffer_mutex);
751
752 return err;
753}
754
755void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
756{
38ecc370 757 PerThreadContext *p = avctx->internal->thread_ctx;
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758 FrameThreadContext *fctx;
759 AVFrame *dst, *tmp;
760FF_DISABLE_DEPRECATION_WARNINGS
761 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
762 avctx->thread_safe_callbacks ||
763 (
764#if FF_API_GET_BUFFER
765 !avctx->get_buffer &&
766#endif
767 avctx->get_buffer2 == avcodec_default_get_buffer2);
768FF_ENABLE_DEPRECATION_WARNINGS
769
a553c6a3 770 if (!f->f->buf[0])
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771 return;
772
773 if (avctx->debug & FF_DEBUG_BUFFERS)
774 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
775
776 av_buffer_unref(&f->progress);
777 f->owner = NULL;
778
779 if (can_direct_free) {
780 av_frame_unref(f->f);
781 return;
782 }
783
784 fctx = p->parent;
785 pthread_mutex_lock(&fctx->buffer_mutex);
786
787 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
788 goto fail;
789 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
790 (p->num_released_buffers + 1) *
791 sizeof(*p->released_buffers));
792 if (!tmp)
793 goto fail;
794 p->released_buffers = tmp;
795
796 dst = &p->released_buffers[p->num_released_buffers];
797 av_frame_move_ref(dst, f->f);
798
799 p->num_released_buffers++;
800
801fail:
802 pthread_mutex_unlock(&fctx->buffer_mutex);
803}