Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / pthread_frame.c
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 #elif HAVE_OS2THREADS
34 #include "compat/os2threads.h"
35 #endif
36
37 #include "avcodec.h"
38 #include "internal.h"
39 #include "pthread_internal.h"
40 #include "thread.h"
41 #include "version.h"
42
43 #include "libavutil/avassert.h"
44 #include "libavutil/buffer.h"
45 #include "libavutil/common.h"
46 #include "libavutil/cpu.h"
47 #include "libavutil/frame.h"
48 #include "libavutil/internal.h"
49 #include "libavutil/log.h"
50 #include "libavutil/mem.h"
51
52 /**
53 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
54 */
55 typedef struct PerThreadContext {
56 struct FrameThreadContext *parent;
57
58 pthread_t thread;
59 int thread_init;
60 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
61 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
62 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
63
64 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
65 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
66
67 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
68
69 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
70
71 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
72 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
73 int result; ///< The result of the last codec decode/encode() call.
74
75 enum {
76 STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
77 STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
78 STATE_GET_BUFFER, /**<
79 * Set when the codec calls get_buffer().
80 * State is returned to STATE_SETTING_UP afterwards.
81 */
82 STATE_GET_FORMAT, /**<
83 * Set when the codec calls get_format().
84 * State is returned to STATE_SETTING_UP afterwards.
85 */
86 STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
87 } state;
88
89 /**
90 * Array of frames passed to ff_thread_release_buffer().
91 * Frames are released after all threads referencing them are finished.
92 */
93 AVFrame *released_buffers;
94 int num_released_buffers;
95 int released_buffers_allocated;
96
97 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
98 int requested_flags; ///< flags passed to get_buffer() for requested_frame
99
100 const enum AVPixelFormat *available_formats; ///< Format array for get_format()
101 enum AVPixelFormat result_format; ///< get_format() result
102 } PerThreadContext;
103
104 /**
105 * Context stored in the client AVCodecInternal thread_ctx.
106 */
107 typedef struct FrameThreadContext {
108 PerThreadContext *threads; ///< The contexts for each thread.
109 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
110
111 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
112
113 int next_decoding; ///< The next context to submit a packet to.
114 int next_finished; ///< The next context to return output from.
115
116 int delaying; /**<
117 * Set for the first N packets, where N is the number of threads.
118 * While it is set, ff_thread_en/decode_frame won't return any results.
119 */
120
121 int die; ///< Set when threads should exit.
122 } FrameThreadContext;
123
124 #if FF_API_GET_BUFFER
125 #define THREAD_SAFE_CALLBACKS(avctx) \
126 ((avctx)->thread_safe_callbacks || (!(avctx)->get_buffer && (avctx)->get_buffer2 == avcodec_default_get_buffer2))
127 #else
128 #define THREAD_SAFE_CALLBACKS(avctx) \
129 ((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
130 #endif
131
132 /**
133 * Codec worker thread.
134 *
135 * Automatically calls ff_thread_finish_setup() if the codec does
136 * not provide an update_thread_context method, or if the codec returns
137 * before calling it.
138 */
139 static attribute_align_arg void *frame_worker_thread(void *arg)
140 {
141 PerThreadContext *p = arg;
142 FrameThreadContext *fctx = p->parent;
143 AVCodecContext *avctx = p->avctx;
144 const AVCodec *codec = avctx->codec;
145
146 pthread_mutex_lock(&p->mutex);
147 while (1) {
148 while (p->state == STATE_INPUT_READY && !fctx->die)
149 pthread_cond_wait(&p->input_cond, &p->mutex);
150
151 if (fctx->die) break;
152
153 if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
154 ff_thread_finish_setup(avctx);
155
156 av_frame_unref(p->frame);
157 p->got_frame = 0;
158 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
159
160 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
161 if (avctx->internal->allocate_progress)
162 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
163 "free the frame on failure. This is a bug, please report it.\n");
164 av_frame_unref(p->frame);
165 }
166
167 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
168
169 pthread_mutex_lock(&p->progress_mutex);
170 #if 0 //BUFREF-FIXME
171 for (i = 0; i < MAX_BUFFERS; i++)
172 if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
173 p->progress[i][0] = INT_MAX;
174 p->progress[i][1] = INT_MAX;
175 }
176 #endif
177 p->state = STATE_INPUT_READY;
178
179 pthread_cond_broadcast(&p->progress_cond);
180 pthread_cond_signal(&p->output_cond);
181 pthread_mutex_unlock(&p->progress_mutex);
182 }
183 pthread_mutex_unlock(&p->mutex);
184
185 return NULL;
186 }
187
188 /**
189 * Update the next thread's AVCodecContext with values from the reference thread's context.
190 *
191 * @param dst The destination context.
192 * @param src The source context.
193 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
194 */
195 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
196 {
197 int err = 0;
198
199 if (dst != src) {
200 dst->time_base = src->time_base;
201 dst->framerate = src->framerate;
202 dst->width = src->width;
203 dst->height = src->height;
204 dst->pix_fmt = src->pix_fmt;
205
206 dst->coded_width = src->coded_width;
207 dst->coded_height = src->coded_height;
208
209 dst->has_b_frames = src->has_b_frames;
210 dst->idct_algo = src->idct_algo;
211
212 dst->bits_per_coded_sample = src->bits_per_coded_sample;
213 dst->sample_aspect_ratio = src->sample_aspect_ratio;
214 #if FF_API_AFD
215 FF_DISABLE_DEPRECATION_WARNINGS
216 dst->dtg_active_format = src->dtg_active_format;
217 FF_ENABLE_DEPRECATION_WARNINGS
218 #endif /* FF_API_AFD */
219
220 dst->profile = src->profile;
221 dst->level = src->level;
222
223 dst->bits_per_raw_sample = src->bits_per_raw_sample;
224 dst->ticks_per_frame = src->ticks_per_frame;
225 dst->color_primaries = src->color_primaries;
226
227 dst->color_trc = src->color_trc;
228 dst->colorspace = src->colorspace;
229 dst->color_range = src->color_range;
230 dst->chroma_sample_location = src->chroma_sample_location;
231
232 dst->hwaccel = src->hwaccel;
233 dst->hwaccel_context = src->hwaccel_context;
234
235 dst->channels = src->channels;
236 dst->sample_rate = src->sample_rate;
237 dst->sample_fmt = src->sample_fmt;
238 dst->channel_layout = src->channel_layout;
239 dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
240 }
241
242 if (for_user) {
243 dst->delay = src->thread_count - 1;
244 dst->coded_frame = src->coded_frame;
245 } else {
246 if (dst->codec->update_thread_context)
247 err = dst->codec->update_thread_context(dst, src);
248 }
249
250 return err;
251 }
252
253 /**
254 * Update the next thread's AVCodecContext with values set by the user.
255 *
256 * @param dst The destination context.
257 * @param src The source context.
258 * @return 0 on success, negative error code on failure
259 */
260 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
261 {
262 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
263 dst->flags = src->flags;
264
265 dst->draw_horiz_band= src->draw_horiz_band;
266 dst->get_buffer2 = src->get_buffer2;
267 #if FF_API_GET_BUFFER
268 FF_DISABLE_DEPRECATION_WARNINGS
269 dst->get_buffer = src->get_buffer;
270 dst->release_buffer = src->release_buffer;
271 FF_ENABLE_DEPRECATION_WARNINGS
272 #endif
273
274 dst->opaque = src->opaque;
275 dst->debug = src->debug;
276 dst->debug_mv = src->debug_mv;
277
278 dst->slice_flags = src->slice_flags;
279 dst->flags2 = src->flags2;
280
281 copy_fields(skip_loop_filter, subtitle_header);
282
283 dst->frame_number = src->frame_number;
284 dst->reordered_opaque = src->reordered_opaque;
285 dst->thread_safe_callbacks = src->thread_safe_callbacks;
286
287 if (src->slice_count && src->slice_offset) {
288 if (dst->slice_count < src->slice_count) {
289 int err = av_reallocp_array(&dst->slice_offset, src->slice_count,
290 sizeof(*dst->slice_offset));
291 if (err < 0)
292 return err;
293 }
294 memcpy(dst->slice_offset, src->slice_offset,
295 src->slice_count * sizeof(*dst->slice_offset));
296 }
297 dst->slice_count = src->slice_count;
298 return 0;
299 #undef copy_fields
300 }
301
302 /// Releases the buffers that this decoding thread was the last user of.
303 static void release_delayed_buffers(PerThreadContext *p)
304 {
305 FrameThreadContext *fctx = p->parent;
306
307 while (p->num_released_buffers > 0) {
308 AVFrame *f;
309
310 pthread_mutex_lock(&fctx->buffer_mutex);
311
312 // fix extended data in case the caller screwed it up
313 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
314 p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
315 f = &p->released_buffers[--p->num_released_buffers];
316 f->extended_data = f->data;
317 av_frame_unref(f);
318
319 pthread_mutex_unlock(&fctx->buffer_mutex);
320 }
321 }
322
323 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
324 {
325 FrameThreadContext *fctx = p->parent;
326 PerThreadContext *prev_thread = fctx->prev_thread;
327 const AVCodec *codec = p->avctx->codec;
328
329 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
330
331 pthread_mutex_lock(&p->mutex);
332
333 release_delayed_buffers(p);
334
335 if (prev_thread) {
336 int err;
337 if (prev_thread->state == STATE_SETTING_UP) {
338 pthread_mutex_lock(&prev_thread->progress_mutex);
339 while (prev_thread->state == STATE_SETTING_UP)
340 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
341 pthread_mutex_unlock(&prev_thread->progress_mutex);
342 }
343
344 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
345 if (err) {
346 pthread_mutex_unlock(&p->mutex);
347 return err;
348 }
349 }
350
351 av_packet_unref(&p->avpkt);
352 av_packet_ref(&p->avpkt, avpkt);
353
354 p->state = STATE_SETTING_UP;
355 pthread_cond_signal(&p->input_cond);
356 pthread_mutex_unlock(&p->mutex);
357
358 /*
359 * If the client doesn't have a thread-safe get_buffer(),
360 * then decoding threads call back to the main thread,
361 * and it calls back to the client here.
362 */
363
364 FF_DISABLE_DEPRECATION_WARNINGS
365 if (!p->avctx->thread_safe_callbacks && (
366 p->avctx->get_format != avcodec_default_get_format ||
367 #if FF_API_GET_BUFFER
368 p->avctx->get_buffer ||
369 #endif
370 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
371 FF_ENABLE_DEPRECATION_WARNINGS
372 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
373 int call_done = 1;
374 pthread_mutex_lock(&p->progress_mutex);
375 while (p->state == STATE_SETTING_UP)
376 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
377
378 switch (p->state) {
379 case STATE_GET_BUFFER:
380 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
381 break;
382 case STATE_GET_FORMAT:
383 p->result_format = ff_get_format(p->avctx, p->available_formats);
384 break;
385 default:
386 call_done = 0;
387 break;
388 }
389 if (call_done) {
390 p->state = STATE_SETTING_UP;
391 pthread_cond_signal(&p->progress_cond);
392 }
393 pthread_mutex_unlock(&p->progress_mutex);
394 }
395 }
396
397 fctx->prev_thread = p;
398 fctx->next_decoding++;
399
400 return 0;
401 }
402
403 int ff_thread_decode_frame(AVCodecContext *avctx,
404 AVFrame *picture, int *got_picture_ptr,
405 AVPacket *avpkt)
406 {
407 FrameThreadContext *fctx = avctx->internal->thread_ctx;
408 int finished = fctx->next_finished;
409 PerThreadContext *p;
410 int err;
411
412 /*
413 * Submit a packet to the next decoding thread.
414 */
415
416 p = &fctx->threads[fctx->next_decoding];
417 err = update_context_from_user(p->avctx, avctx);
418 if (err) return err;
419 err = submit_packet(p, avpkt);
420 if (err) return err;
421
422 /*
423 * If we're still receiving the initial packets, don't return a frame.
424 */
425
426 if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
427 fctx->delaying = 0;
428
429 if (fctx->delaying) {
430 *got_picture_ptr=0;
431 if (avpkt->size)
432 return avpkt->size;
433 }
434
435 /*
436 * Return the next available frame from the oldest thread.
437 * If we're at the end of the stream, then we have to skip threads that
438 * didn't output a frame, because we don't want to accidentally signal
439 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
440 */
441
442 do {
443 p = &fctx->threads[finished++];
444
445 if (p->state != STATE_INPUT_READY) {
446 pthread_mutex_lock(&p->progress_mutex);
447 while (p->state != STATE_INPUT_READY)
448 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
449 pthread_mutex_unlock(&p->progress_mutex);
450 }
451
452 av_frame_move_ref(picture, p->frame);
453 *got_picture_ptr = p->got_frame;
454 picture->pkt_dts = p->avpkt.dts;
455
456 /*
457 * A later call with avkpt->size == 0 may loop over all threads,
458 * including this one, searching for a frame to return before being
459 * stopped by the "finished != fctx->next_finished" condition.
460 * Make sure we don't mistakenly return the same frame again.
461 */
462 p->got_frame = 0;
463
464 if (finished >= avctx->thread_count) finished = 0;
465 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
466
467 update_context_from_thread(avctx, p->avctx, 1);
468
469 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
470
471 fctx->next_finished = finished;
472
473 /* return the size of the consumed packet if no error occurred */
474 return (p->result >= 0) ? avpkt->size : p->result;
475 }
476
477 void ff_thread_report_progress(ThreadFrame *f, int n, int field)
478 {
479 PerThreadContext *p;
480 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
481
482 if (!progress || progress[field] >= n) return;
483
484 p = f->owner->internal->thread_ctx;
485
486 if (f->owner->debug&FF_DEBUG_THREADS)
487 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
488
489 pthread_mutex_lock(&p->progress_mutex);
490 progress[field] = n;
491 pthread_cond_broadcast(&p->progress_cond);
492 pthread_mutex_unlock(&p->progress_mutex);
493 }
494
495 void ff_thread_await_progress(ThreadFrame *f, int n, int field)
496 {
497 PerThreadContext *p;
498 volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
499
500 if (!progress || progress[field] >= n) return;
501
502 p = f->owner->internal->thread_ctx;
503
504 if (f->owner->debug&FF_DEBUG_THREADS)
505 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
506
507 pthread_mutex_lock(&p->progress_mutex);
508 while (progress[field] < n)
509 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
510 pthread_mutex_unlock(&p->progress_mutex);
511 }
512
513 void ff_thread_finish_setup(AVCodecContext *avctx) {
514 PerThreadContext *p = avctx->internal->thread_ctx;
515
516 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
517
518 if(p->state == STATE_SETUP_FINISHED){
519 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
520 }
521
522 pthread_mutex_lock(&p->progress_mutex);
523 p->state = STATE_SETUP_FINISHED;
524 pthread_cond_broadcast(&p->progress_cond);
525 pthread_mutex_unlock(&p->progress_mutex);
526 }
527
528 /// Waits for all threads to finish.
529 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
530 {
531 int i;
532
533 for (i = 0; i < thread_count; i++) {
534 PerThreadContext *p = &fctx->threads[i];
535
536 if (p->state != STATE_INPUT_READY) {
537 pthread_mutex_lock(&p->progress_mutex);
538 while (p->state != STATE_INPUT_READY)
539 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
540 pthread_mutex_unlock(&p->progress_mutex);
541 }
542 p->got_frame = 0;
543 }
544 }
545
546 void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
547 {
548 FrameThreadContext *fctx = avctx->internal->thread_ctx;
549 const AVCodec *codec = avctx->codec;
550 int i;
551
552 park_frame_worker_threads(fctx, thread_count);
553
554 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
555 if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
556 av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
557 fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
558 fctx->threads->avctx->internal->is_copy = 1;
559 }
560
561 fctx->die = 1;
562
563 for (i = 0; i < thread_count; i++) {
564 PerThreadContext *p = &fctx->threads[i];
565
566 pthread_mutex_lock(&p->mutex);
567 pthread_cond_signal(&p->input_cond);
568 pthread_mutex_unlock(&p->mutex);
569
570 if (p->thread_init)
571 pthread_join(p->thread, NULL);
572 p->thread_init=0;
573
574 if (codec->close)
575 codec->close(p->avctx);
576
577 avctx->codec = NULL;
578
579 release_delayed_buffers(p);
580 av_frame_free(&p->frame);
581 }
582
583 for (i = 0; i < thread_count; i++) {
584 PerThreadContext *p = &fctx->threads[i];
585
586 pthread_mutex_destroy(&p->mutex);
587 pthread_mutex_destroy(&p->progress_mutex);
588 pthread_cond_destroy(&p->input_cond);
589 pthread_cond_destroy(&p->progress_cond);
590 pthread_cond_destroy(&p->output_cond);
591 av_packet_unref(&p->avpkt);
592 av_freep(&p->released_buffers);
593
594 if (i) {
595 av_freep(&p->avctx->priv_data);
596 av_freep(&p->avctx->slice_offset);
597 }
598
599 av_freep(&p->avctx->internal);
600 av_freep(&p->avctx);
601 }
602
603 av_freep(&fctx->threads);
604 pthread_mutex_destroy(&fctx->buffer_mutex);
605 av_freep(&avctx->internal->thread_ctx);
606 }
607
608 int ff_frame_thread_init(AVCodecContext *avctx)
609 {
610 int thread_count = avctx->thread_count;
611 const AVCodec *codec = avctx->codec;
612 AVCodecContext *src = avctx;
613 FrameThreadContext *fctx;
614 int i, err = 0;
615
616 #if HAVE_W32THREADS
617 w32thread_init();
618 #endif
619
620 if (!thread_count) {
621 int nb_cpus = av_cpu_count();
622 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
623 nb_cpus = 1;
624 // use number of cores + 1 as thread count if there is more than one
625 if (nb_cpus > 1)
626 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
627 else
628 thread_count = avctx->thread_count = 1;
629 }
630
631 if (thread_count <= 1) {
632 avctx->active_thread_type = 0;
633 return 0;
634 }
635
636 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
637
638 fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
639 pthread_mutex_init(&fctx->buffer_mutex, NULL);
640 fctx->delaying = 1;
641
642 for (i = 0; i < thread_count; i++) {
643 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
644 PerThreadContext *p = &fctx->threads[i];
645
646 pthread_mutex_init(&p->mutex, NULL);
647 pthread_mutex_init(&p->progress_mutex, NULL);
648 pthread_cond_init(&p->input_cond, NULL);
649 pthread_cond_init(&p->progress_cond, NULL);
650 pthread_cond_init(&p->output_cond, NULL);
651
652 p->frame = av_frame_alloc();
653 if (!p->frame) {
654 av_freep(&copy);
655 err = AVERROR(ENOMEM);
656 goto error;
657 }
658
659 p->parent = fctx;
660 p->avctx = copy;
661
662 if (!copy) {
663 err = AVERROR(ENOMEM);
664 goto error;
665 }
666
667 *copy = *src;
668
669 copy->internal = av_malloc(sizeof(AVCodecInternal));
670 if (!copy->internal) {
671 err = AVERROR(ENOMEM);
672 goto error;
673 }
674 *copy->internal = *src->internal;
675 copy->internal->thread_ctx = p;
676 copy->internal->pkt = &p->avpkt;
677
678 if (!i) {
679 src = copy;
680
681 if (codec->init)
682 err = codec->init(copy);
683
684 update_context_from_thread(avctx, copy, 1);
685 } else {
686 copy->priv_data = av_malloc(codec->priv_data_size);
687 if (!copy->priv_data) {
688 err = AVERROR(ENOMEM);
689 goto error;
690 }
691 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
692 copy->internal->is_copy = 1;
693
694 if (codec->init_thread_copy)
695 err = codec->init_thread_copy(copy);
696 }
697
698 if (err) goto error;
699
700 err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
701 p->thread_init= !err;
702 if(!p->thread_init)
703 goto error;
704 }
705
706 return 0;
707
708 error:
709 ff_frame_thread_free(avctx, i+1);
710
711 return err;
712 }
713
714 void ff_thread_flush(AVCodecContext *avctx)
715 {
716 int i;
717 FrameThreadContext *fctx = avctx->internal->thread_ctx;
718
719 if (!fctx) return;
720
721 park_frame_worker_threads(fctx, avctx->thread_count);
722 if (fctx->prev_thread) {
723 if (fctx->prev_thread != &fctx->threads[0])
724 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
725 }
726
727 fctx->next_decoding = fctx->next_finished = 0;
728 fctx->delaying = 1;
729 fctx->prev_thread = NULL;
730 for (i = 0; i < avctx->thread_count; i++) {
731 PerThreadContext *p = &fctx->threads[i];
732 // Make sure decode flush calls with size=0 won't return old frames
733 p->got_frame = 0;
734 av_frame_unref(p->frame);
735
736 release_delayed_buffers(p);
737
738 if (avctx->codec->flush)
739 avctx->codec->flush(p->avctx);
740 }
741 }
742
743 int ff_thread_can_start_frame(AVCodecContext *avctx)
744 {
745 PerThreadContext *p = avctx->internal->thread_ctx;
746 if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
747 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
748 return 0;
749 }
750 return 1;
751 }
752
753 static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
754 {
755 PerThreadContext *p = avctx->internal->thread_ctx;
756 int err;
757
758 f->owner = avctx;
759
760 ff_init_buffer_info(avctx, f->f);
761
762 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
763 return ff_get_buffer(avctx, f->f, flags);
764
765 if (p->state != STATE_SETTING_UP &&
766 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
767 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
768 return -1;
769 }
770
771 if (avctx->internal->allocate_progress) {
772 int *progress;
773 f->progress = av_buffer_alloc(2 * sizeof(int));
774 if (!f->progress) {
775 return AVERROR(ENOMEM);
776 }
777 progress = (int*)f->progress->data;
778
779 progress[0] = progress[1] = -1;
780 }
781
782 pthread_mutex_lock(&p->parent->buffer_mutex);
783 FF_DISABLE_DEPRECATION_WARNINGS
784 if (avctx->thread_safe_callbacks || (
785 #if FF_API_GET_BUFFER
786 !avctx->get_buffer &&
787 #endif
788 avctx->get_buffer2 == avcodec_default_get_buffer2)) {
789 FF_ENABLE_DEPRECATION_WARNINGS
790 err = ff_get_buffer(avctx, f->f, flags);
791 } else {
792 pthread_mutex_lock(&p->progress_mutex);
793 p->requested_frame = f->f;
794 p->requested_flags = flags;
795 p->state = STATE_GET_BUFFER;
796 pthread_cond_broadcast(&p->progress_cond);
797
798 while (p->state != STATE_SETTING_UP)
799 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
800
801 err = p->result;
802
803 pthread_mutex_unlock(&p->progress_mutex);
804
805 }
806 if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
807 ff_thread_finish_setup(avctx);
808
809 if (err)
810 av_buffer_unref(&f->progress);
811
812 pthread_mutex_unlock(&p->parent->buffer_mutex);
813
814 return err;
815 }
816
817 enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
818 {
819 enum AVPixelFormat res;
820 PerThreadContext *p = avctx->internal->thread_ctx;
821 if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
822 avctx->get_format == avcodec_default_get_format)
823 return ff_get_format(avctx, fmt);
824 if (p->state != STATE_SETTING_UP) {
825 av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
826 return -1;
827 }
828 pthread_mutex_lock(&p->progress_mutex);
829 p->available_formats = fmt;
830 p->state = STATE_GET_FORMAT;
831 pthread_cond_broadcast(&p->progress_cond);
832
833 while (p->state != STATE_SETTING_UP)
834 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
835
836 res = p->result_format;
837
838 pthread_mutex_unlock(&p->progress_mutex);
839
840 return res;
841 }
842
843 int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
844 {
845 int ret = thread_get_buffer_internal(avctx, f, flags);
846 if (ret < 0)
847 av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
848 return ret;
849 }
850
851 void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
852 {
853 PerThreadContext *p = avctx->internal->thread_ctx;
854 FrameThreadContext *fctx;
855 AVFrame *dst, *tmp;
856 FF_DISABLE_DEPRECATION_WARNINGS
857 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
858 avctx->thread_safe_callbacks ||
859 (
860 #if FF_API_GET_BUFFER
861 !avctx->get_buffer &&
862 #endif
863 avctx->get_buffer2 == avcodec_default_get_buffer2);
864 FF_ENABLE_DEPRECATION_WARNINGS
865
866 if (!f->f || !f->f->buf[0])
867 return;
868
869 if (avctx->debug & FF_DEBUG_BUFFERS)
870 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
871
872 av_buffer_unref(&f->progress);
873 f->owner = NULL;
874
875 if (can_direct_free) {
876 av_frame_unref(f->f);
877 return;
878 }
879
880 fctx = p->parent;
881 pthread_mutex_lock(&fctx->buffer_mutex);
882
883 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
884 goto fail;
885 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
886 (p->num_released_buffers + 1) *
887 sizeof(*p->released_buffers));
888 if (!tmp)
889 goto fail;
890 p->released_buffers = tmp;
891
892 dst = &p->released_buffers[p->num_released_buffers];
893 av_frame_move_ref(dst, f->f);
894
895 p->num_released_buffers++;
896
897 fail:
898 pthread_mutex_unlock(&fctx->buffer_mutex);
899 }