pthread_frame: use the AVFrame API properly.
[libav.git] / libavcodec / pthread_frame.c
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 /**
49 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
50 */
51 typedef 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
69 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
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 /**
96 * Context stored in the client AVCodecInternal thread_ctx.
97 */
98 typedef 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 */
122 static 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);
143 av_frame_unref(p->frame);
144 p->got_frame = 0;
145 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
146
147 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
148
149 p->state = STATE_INPUT_READY;
150
151 pthread_mutex_lock(&p->progress_mutex);
152 pthread_cond_signal(&p->output_cond);
153 pthread_mutex_unlock(&p->progress_mutex);
154
155 pthread_mutex_unlock(&p->mutex);
156 }
157
158 return NULL;
159 }
160
161 /**
162 * Update the next thread's AVCodecContext with values from the reference thread's context.
163 *
164 * @param dst The destination context.
165 * @param src The source context.
166 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
167 */
168 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
169 {
170 int err = 0;
171
172 if (dst != src) {
173 dst->time_base = src->time_base;
174 dst->width = src->width;
175 dst->height = src->height;
176 dst->pix_fmt = src->pix_fmt;
177
178 dst->coded_width = src->coded_width;
179 dst->coded_height = src->coded_height;
180
181 dst->has_b_frames = src->has_b_frames;
182 dst->idct_algo = src->idct_algo;
183
184 dst->bits_per_coded_sample = src->bits_per_coded_sample;
185 dst->sample_aspect_ratio = src->sample_aspect_ratio;
186 dst->dtg_active_format = src->dtg_active_format;
187
188 dst->profile = src->profile;
189 dst->level = src->level;
190
191 dst->bits_per_raw_sample = src->bits_per_raw_sample;
192 dst->ticks_per_frame = src->ticks_per_frame;
193 dst->color_primaries = src->color_primaries;
194
195 dst->color_trc = src->color_trc;
196 dst->colorspace = src->colorspace;
197 dst->color_range = src->color_range;
198 dst->chroma_sample_location = src->chroma_sample_location;
199
200 dst->hwaccel = src->hwaccel;
201 dst->hwaccel_context = src->hwaccel_context;
202 }
203
204 if (for_user) {
205 dst->coded_frame = src->coded_frame;
206 } else {
207 if (dst->codec->update_thread_context)
208 err = dst->codec->update_thread_context(dst, src);
209 }
210
211 return err;
212 }
213
214 /**
215 * Update the next thread's AVCodecContext with values set by the user.
216 *
217 * @param dst The destination context.
218 * @param src The source context.
219 * @return 0 on success, negative error code on failure
220 */
221 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
222 {
223 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
224 dst->flags = src->flags;
225
226 dst->draw_horiz_band= src->draw_horiz_band;
227 dst->get_buffer2 = src->get_buffer2;
228 #if FF_API_GET_BUFFER
229 FF_DISABLE_DEPRECATION_WARNINGS
230 dst->get_buffer = src->get_buffer;
231 dst->release_buffer = src->release_buffer;
232 FF_ENABLE_DEPRECATION_WARNINGS
233 #endif
234
235 dst->opaque = src->opaque;
236 dst->debug = src->debug;
237
238 dst->slice_flags = src->slice_flags;
239 dst->flags2 = src->flags2;
240
241 copy_fields(skip_loop_filter, subtitle_header);
242
243 dst->frame_number = src->frame_number;
244 dst->reordered_opaque = src->reordered_opaque;
245
246 if (src->slice_count && src->slice_offset) {
247 if (dst->slice_count < src->slice_count) {
248 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
249 sizeof(*dst->slice_offset));
250 if (!tmp) {
251 av_free(dst->slice_offset);
252 return AVERROR(ENOMEM);
253 }
254 dst->slice_offset = tmp;
255 }
256 memcpy(dst->slice_offset, src->slice_offset,
257 src->slice_count * sizeof(*dst->slice_offset));
258 }
259 dst->slice_count = src->slice_count;
260 return 0;
261 #undef copy_fields
262 }
263
264 /// Releases the buffers that this decoding thread was the last user of.
265 static void release_delayed_buffers(PerThreadContext *p)
266 {
267 FrameThreadContext *fctx = p->parent;
268
269 while (p->num_released_buffers > 0) {
270 AVFrame *f;
271
272 pthread_mutex_lock(&fctx->buffer_mutex);
273
274 // fix extended data in case the caller screwed it up
275 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO);
276 f = &p->released_buffers[--p->num_released_buffers];
277 f->extended_data = f->data;
278 av_frame_unref(f);
279
280 pthread_mutex_unlock(&fctx->buffer_mutex);
281 }
282 }
283
284 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
285 {
286 FrameThreadContext *fctx = p->parent;
287 PerThreadContext *prev_thread = fctx->prev_thread;
288 const AVCodec *codec = p->avctx->codec;
289
290 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
291
292 pthread_mutex_lock(&p->mutex);
293
294 release_delayed_buffers(p);
295
296 if (prev_thread) {
297 int err;
298 if (prev_thread->state == STATE_SETTING_UP) {
299 pthread_mutex_lock(&prev_thread->progress_mutex);
300 while (prev_thread->state == STATE_SETTING_UP)
301 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
302 pthread_mutex_unlock(&prev_thread->progress_mutex);
303 }
304
305 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
306 if (err) {
307 pthread_mutex_unlock(&p->mutex);
308 return err;
309 }
310 }
311
312 av_buffer_unref(&p->avpkt.buf);
313 p->avpkt = *avpkt;
314 if (avpkt->buf)
315 p->avpkt.buf = av_buffer_ref(avpkt->buf);
316 else {
317 av_fast_malloc(&p->buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
318 p->avpkt.data = p->buf;
319 memcpy(p->buf, avpkt->data, avpkt->size);
320 memset(p->buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
321 }
322
323 p->state = STATE_SETTING_UP;
324 pthread_cond_signal(&p->input_cond);
325 pthread_mutex_unlock(&p->mutex);
326
327 /*
328 * If the client doesn't have a thread-safe get_buffer(),
329 * then decoding threads call back to the main thread,
330 * and it calls back to the client here.
331 */
332
333 FF_DISABLE_DEPRECATION_WARNINGS
334 if (!p->avctx->thread_safe_callbacks && (
335 #if FF_API_GET_BUFFER
336 p->avctx->get_buffer ||
337 #endif
338 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
339 FF_ENABLE_DEPRECATION_WARNINGS
340 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
341 pthread_mutex_lock(&p->progress_mutex);
342 while (p->state == STATE_SETTING_UP)
343 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
344
345 if (p->state == STATE_GET_BUFFER) {
346 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
347 p->state = STATE_SETTING_UP;
348 pthread_cond_signal(&p->progress_cond);
349 }
350 pthread_mutex_unlock(&p->progress_mutex);
351 }
352 }
353
354 fctx->prev_thread = p;
355 fctx->next_decoding++;
356
357 return 0;
358 }
359
360 int ff_thread_decode_frame(AVCodecContext *avctx,
361 AVFrame *picture, int *got_picture_ptr,
362 AVPacket *avpkt)
363 {
364 FrameThreadContext *fctx = avctx->internal->thread_ctx;
365 int finished = fctx->next_finished;
366 PerThreadContext *p;
367 int err;
368
369 /*
370 * Submit a packet to the next decoding thread.
371 */
372
373 p = &fctx->threads[fctx->next_decoding];
374 err = update_context_from_user(p->avctx, avctx);
375 if (err) return err;
376 err = submit_packet(p, avpkt);
377 if (err) return err;
378
379 /*
380 * If we're still receiving the initial packets, don't return a frame.
381 */
382
383 if (fctx->delaying) {
384 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
385
386 *got_picture_ptr=0;
387 if (avpkt->size)
388 return avpkt->size;
389 }
390
391 /*
392 * Return the next available frame from the oldest thread.
393 * If we're at the end of the stream, then we have to skip threads that
394 * didn't output a frame, because we don't want to accidentally signal
395 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
396 */
397
398 do {
399 p = &fctx->threads[finished++];
400
401 if (p->state != STATE_INPUT_READY) {
402 pthread_mutex_lock(&p->progress_mutex);
403 while (p->state != STATE_INPUT_READY)
404 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
405 pthread_mutex_unlock(&p->progress_mutex);
406 }
407
408 av_frame_move_ref(picture, p->frame);
409 *got_picture_ptr = p->got_frame;
410 picture->pkt_dts = p->avpkt.dts;
411
412 /*
413 * A later call with avkpt->size == 0 may loop over all threads,
414 * including this one, searching for a frame to return before being
415 * stopped by the "finished != fctx->next_finished" condition.
416 * Make sure we don't mistakenly return the same frame again.
417 */
418 p->got_frame = 0;
419
420 if (finished >= avctx->thread_count) finished = 0;
421 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
422
423 update_context_from_thread(avctx, p->avctx, 1);
424
425 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
426
427 fctx->next_finished = finished;
428
429 /* return the size of the consumed packet if no error occurred */
430 return (p->result >= 0) ? avpkt->size : p->result;
431 }
432
433 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
434 {
435 PerThreadContext *p;
436 int *progress = f->progress ? (int*)f->progress->data : NULL;
437
438 if (!progress || progress[field] >= n) return;
439
440 p = f->owner->internal->thread_ctx;
441
442 if (f->owner->debug&FF_DEBUG_THREADS)
443 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
444
445 pthread_mutex_lock(&p->progress_mutex);
446 progress[field] = n;
447 pthread_cond_broadcast(&p->progress_cond);
448 pthread_mutex_unlock(&p->progress_mutex);
449 }
450
451 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
452 {
453 PerThreadContext *p;
454 int *progress = f->progress ? (int*)f->progress->data : NULL;
455
456 if (!progress || progress[field] >= n) return;
457
458 p = f->owner->internal->thread_ctx;
459
460 if (f->owner->debug&FF_DEBUG_THREADS)
461 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
462
463 pthread_mutex_lock(&p->progress_mutex);
464 while (progress[field] < n)
465 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
466 pthread_mutex_unlock(&p->progress_mutex);
467 }
468
469 void ff_thread_finish_setup(AVCodecContext *avctx) {
470 PerThreadContext *p = avctx->internal->thread_ctx;
471
472 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
473
474 pthread_mutex_lock(&p->progress_mutex);
475 p->state = STATE_SETUP_FINISHED;
476 pthread_cond_broadcast(&p->progress_cond);
477 pthread_mutex_unlock(&p->progress_mutex);
478 }
479
480 /// Waits for all threads to finish.
481 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
482 {
483 int i;
484
485 for (i = 0; i < thread_count; i++) {
486 PerThreadContext *p = &fctx->threads[i];
487
488 if (p->state != STATE_INPUT_READY) {
489 pthread_mutex_lock(&p->progress_mutex);
490 while (p->state != STATE_INPUT_READY)
491 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
492 pthread_mutex_unlock(&p->progress_mutex);
493 }
494 }
495 }
496
497 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
498 {
499 FrameThreadContext *fctx = avctx->internal->thread_ctx;
500 const AVCodec *codec = avctx->codec;
501 int i;
502
503 park_frame_worker_threads(fctx, thread_count);
504
505 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
506 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
507
508 fctx->die = 1;
509
510 for (i = 0; i < thread_count; i++) {
511 PerThreadContext *p = &fctx->threads[i];
512
513 pthread_mutex_lock(&p->mutex);
514 pthread_cond_signal(&p->input_cond);
515 pthread_mutex_unlock(&p->mutex);
516
517 if (p->thread_init)
518 pthread_join(p->thread, NULL);
519
520 if (codec->close)
521 codec->close(p->avctx);
522
523 avctx->codec = NULL;
524
525 release_delayed_buffers(p);
526 av_frame_free(&p->frame);
527 }
528
529 for (i = 0; i < thread_count; i++) {
530 PerThreadContext *p = &fctx->threads[i];
531
532 pthread_mutex_destroy(&p->mutex);
533 pthread_mutex_destroy(&p->progress_mutex);
534 pthread_cond_destroy(&p->input_cond);
535 pthread_cond_destroy(&p->progress_cond);
536 pthread_cond_destroy(&p->output_cond);
537 av_buffer_unref(&p->avpkt.buf);
538 av_freep(&p->buf);
539 av_freep(&p->released_buffers);
540
541 if (i) {
542 av_freep(&p->avctx->priv_data);
543 av_freep(&p->avctx->slice_offset);
544 }
545
546 av_freep(&p->avctx->internal);
547 av_freep(&p->avctx);
548 }
549
550 av_freep(&fctx->threads);
551 pthread_mutex_destroy(&fctx->buffer_mutex);
552 av_freep(&avctx->internal->thread_ctx);
553 }
554
555 int ff_frame_thread_init(AVCodecContext *avctx)
556 {
557 int thread_count = avctx->thread_count;
558 const AVCodec *codec = avctx->codec;
559 AVCodecContext *src = avctx;
560 FrameThreadContext *fctx;
561 int i, err = 0;
562
563 #if HAVE_W32THREADS
564 w32thread_init();
565 #endif
566
567 if (!thread_count) {
568 int nb_cpus = av_cpu_count();
569 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
570 // use number of cores + 1 as thread count if there is more than one
571 if (nb_cpus > 1)
572 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
573 else
574 thread_count = avctx->thread_count = 1;
575 }
576
577 if (thread_count <= 1) {
578 avctx->active_thread_type = 0;
579 return 0;
580 }
581
582 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
583
584 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
585 pthread_mutex_init(&fctx->buffer_mutex, NULL);
586 fctx->delaying = 1;
587
588 for (i = 0; i < thread_count; i++) {
589 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
590 PerThreadContext *p = &fctx->threads[i];
591
592 pthread_mutex_init(&p->mutex, NULL);
593 pthread_mutex_init(&p->progress_mutex, NULL);
594 pthread_cond_init(&p->input_cond, NULL);
595 pthread_cond_init(&p->progress_cond, NULL);
596 pthread_cond_init(&p->output_cond, NULL);
597
598 p->frame = av_frame_alloc();
599 if (!p->frame) {
600 err = AVERROR(ENOMEM);
601 goto error;
602 }
603
604 p->parent = fctx;
605 p->avctx = copy;
606
607 if (!copy) {
608 err = AVERROR(ENOMEM);
609 goto error;
610 }
611
612 *copy = *src;
613
614 copy->internal = av_malloc(sizeof(AVCodecInternal));
615 if (!copy->internal) {
616 err = AVERROR(ENOMEM);
617 goto error;
618 }
619 *copy->internal = *src->internal;
620 copy->internal->thread_ctx = p;
621 copy->internal->pkt = &p->avpkt;
622
623 if (!i) {
624 src = copy;
625
626 if (codec->init)
627 err = codec->init(copy);
628
629 update_context_from_thread(avctx, copy, 1);
630 } else {
631 copy->priv_data = av_malloc(codec->priv_data_size);
632 if (!copy->priv_data) {
633 err = AVERROR(ENOMEM);
634 goto error;
635 }
636 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
637 copy->internal->is_copy = 1;
638
639 if (codec->init_thread_copy)
640 err = codec->init_thread_copy(copy);
641 }
642
643 if (err) goto error;
644
645 if (!pthread_create(&p->thread, NULL, frame_worker_thread, p))
646 p->thread_init = 1;
647 }
648
649 return 0;
650
651 error:
652 ff_frame_thread_free(avctx, i+1);
653
654 return err;
655 }
656
657 void ff_thread_flush(AVCodecContext *avctx)
658 {
659 int i;
660 FrameThreadContext *fctx = avctx->internal->thread_ctx;
661
662 if (!fctx) return;
663
664 park_frame_worker_threads(fctx, avctx->thread_count);
665 if (fctx->prev_thread) {
666 if (fctx->prev_thread != &fctx->threads[0])
667 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
668 if (avctx->codec->flush)
669 avctx->codec->flush(fctx->threads[0].avctx);
670 }
671
672 fctx->next_decoding = fctx->next_finished = 0;
673 fctx->delaying = 1;
674 fctx->prev_thread = NULL;
675 for (i = 0; i < avctx->thread_count; i++) {
676 PerThreadContext *p = &fctx->threads[i];
677 // Make sure decode flush calls with size=0 won't return old frames
678 p->got_frame = 0;
679 av_frame_unref(p->frame);
680
681 release_delayed_buffers(p);
682 }
683 }
684
685 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
686 {
687 PerThreadContext *p = avctx->internal->thread_ctx;
688 int err;
689
690 f->owner = avctx;
691
692 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
693 return ff_get_buffer(avctx, f->f, flags);
694
695 if (p->state != STATE_SETTING_UP &&
696 (avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) {
697 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
698 return -1;
699 }
700
701 if (avctx->internal->allocate_progress) {
702 int *progress;
703 f->progress = av_buffer_alloc(2 * sizeof(int));
704 if (!f->progress) {
705 return AVERROR(ENOMEM);
706 }
707 progress = (int*)f->progress->data;
708
709 progress[0] = progress[1] = -1;
710 }
711
712 pthread_mutex_lock(&p->parent->buffer_mutex);
713 FF_DISABLE_DEPRECATION_WARNINGS
714 if (avctx->thread_safe_callbacks || (
715 #if FF_API_GET_BUFFER
716 !avctx->get_buffer &&
717 #endif
718 avctx->get_buffer2 == avcodec_default_get_buffer2)) {
719 FF_ENABLE_DEPRECATION_WARNINGS
720 err = ff_get_buffer(avctx, f->f, flags);
721 } else {
722 p->requested_frame = f->f;
723 p->requested_flags = flags;
724 p->state = STATE_GET_BUFFER;
725 pthread_mutex_lock(&p->progress_mutex);
726 pthread_cond_signal(&p->progress_cond);
727
728 while (p->state != STATE_SETTING_UP)
729 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
730
731 err = p->result;
732
733 pthread_mutex_unlock(&p->progress_mutex);
734
735 }
736 if (!avctx->thread_safe_callbacks && !avctx->codec->update_thread_context)
737 ff_thread_finish_setup(avctx);
738
739 if (err)
740 av_buffer_unref(&f->progress);
741
742 pthread_mutex_unlock(&p->parent->buffer_mutex);
743
744 return err;
745 }
746
747 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
748 {
749 PerThreadContext *p = avctx->internal->thread_ctx;
750 FrameThreadContext *fctx;
751 AVFrame *dst, *tmp;
752 FF_DISABLE_DEPRECATION_WARNINGS
753 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
754 avctx->thread_safe_callbacks ||
755 (
756 #if FF_API_GET_BUFFER
757 !avctx->get_buffer &&
758 #endif
759 avctx->get_buffer2 == avcodec_default_get_buffer2);
760 FF_ENABLE_DEPRECATION_WARNINGS
761
762 if (!f->f->buf[0])
763 return;
764
765 if (avctx->debug & FF_DEBUG_BUFFERS)
766 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
767
768 av_buffer_unref(&f->progress);
769 f->owner = NULL;
770
771 if (can_direct_free) {
772 av_frame_unref(f->f);
773 return;
774 }
775
776 fctx = p->parent;
777 pthread_mutex_lock(&fctx->buffer_mutex);
778
779 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
780 goto fail;
781 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
782 (p->num_released_buffers + 1) *
783 sizeof(*p->released_buffers));
784 if (!tmp)
785 goto fail;
786 p->released_buffers = tmp;
787
788 dst = &p->released_buffers[p->num_released_buffers];
789 av_frame_move_ref(dst, f->f);
790
791 p->num_released_buffers++;
792
793 fail:
794 pthread_mutex_unlock(&fctx->buffer_mutex);
795 }