summaryrefslogtreecommitdiff
path: root/libavcodec/pthread_frame.c (plain)
blob: 0ba87b5929f4b7f79b4355e02ec1dcc04ea31c64
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 <stdatomic.h>
28#include <stdint.h>
29
30#include "avcodec.h"
31#include "hwaccel.h"
32#include "internal.h"
33#include "pthread_internal.h"
34#include "thread.h"
35#include "version.h"
36
37#include "libavutil/avassert.h"
38#include "libavutil/buffer.h"
39#include "libavutil/common.h"
40#include "libavutil/cpu.h"
41#include "libavutil/frame.h"
42#include "libavutil/internal.h"
43#include "libavutil/log.h"
44#include "libavutil/mem.h"
45#include "libavutil/opt.h"
46#include "libavutil/thread.h"
47
48enum {
49 ///< Set when the thread is awaiting a packet.
50 STATE_INPUT_READY,
51 ///< Set before the codec has called ff_thread_finish_setup().
52 STATE_SETTING_UP,
53 /**
54 * Set when the codec calls get_buffer().
55 * State is returned to STATE_SETTING_UP afterwards.
56 */
57 STATE_GET_BUFFER,
58 /**
59 * Set when the codec calls get_format().
60 * State is returned to STATE_SETTING_UP afterwards.
61 */
62 STATE_GET_FORMAT,
63 ///< Set after the codec has called ff_thread_finish_setup().
64 STATE_SETUP_FINISHED,
65};
66
67/**
68 * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
69 */
70typedef struct PerThreadContext {
71 struct FrameThreadContext *parent;
72
73 pthread_t thread;
74 int thread_init;
75 pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
76 pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
77 pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
78
79 pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
80 pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
81
82 AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
83
84 AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
85
86 AVFrame *frame; ///< Output frame (for decoding) or input (for encoding).
87 int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
88 int result; ///< The result of the last codec decode/encode() call.
89
90 atomic_int state;
91
92 /**
93 * Array of frames passed to ff_thread_release_buffer().
94 * Frames are released after all threads referencing them are finished.
95 */
96 AVFrame *released_buffers;
97 int num_released_buffers;
98 int released_buffers_allocated;
99
100 AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
101 int requested_flags; ///< flags passed to get_buffer() for requested_frame
102
103 const enum AVPixelFormat *available_formats; ///< Format array for get_format()
104 enum AVPixelFormat result_format; ///< get_format() result
105
106 int die; ///< Set when the thread should exit.
107
108 int hwaccel_serializing;
109 int async_serializing;
110} PerThreadContext;
111
112/**
113 * Context stored in the client AVCodecInternal thread_ctx.
114 */
115typedef struct FrameThreadContext {
116 PerThreadContext *threads; ///< The contexts for each thread.
117 PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
118
119 pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
120 /**
121 * This lock is used for ensuring threads run in serial when hwaccel
122 * is used.
123 */
124 pthread_mutex_t hwaccel_mutex;
125 pthread_mutex_t async_mutex;
126 pthread_cond_t async_cond;
127 int async_lock;
128
129 int next_decoding; ///< The next context to submit a packet to.
130 int next_finished; ///< The next context to return output from.
131
132 int delaying; /**<
133 * Set for the first N packets, where N is the number of threads.
134 * While it is set, ff_thread_en/decode_frame won't return any results.
135 */
136} FrameThreadContext;
137
138#define THREAD_SAFE_CALLBACKS(avctx) \
139((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
140
141static void async_lock(FrameThreadContext *fctx)
142{
143 pthread_mutex_lock(&fctx->async_mutex);
144 while (fctx->async_lock)
145 pthread_cond_wait(&fctx->async_cond, &fctx->async_mutex);
146 fctx->async_lock = 1;
147 pthread_mutex_unlock(&fctx->async_mutex);
148}
149
150static void async_unlock(FrameThreadContext *fctx)
151{
152 pthread_mutex_lock(&fctx->async_mutex);
153 av_assert0(fctx->async_lock);
154 fctx->async_lock = 0;
155 pthread_cond_broadcast(&fctx->async_cond);
156 pthread_mutex_unlock(&fctx->async_mutex);
157}
158
159/**
160 * Codec worker thread.
161 *
162 * Automatically calls ff_thread_finish_setup() if the codec does
163 * not provide an update_thread_context method, or if the codec returns
164 * before calling it.
165 */
166static attribute_align_arg void *frame_worker_thread(void *arg)
167{
168 PerThreadContext *p = arg;
169 AVCodecContext *avctx = p->avctx;
170 const AVCodec *codec = avctx->codec;
171
172 pthread_mutex_lock(&p->mutex);
173 while (1) {
174 while (atomic_load(&p->state) == STATE_INPUT_READY && !p->die)
175 pthread_cond_wait(&p->input_cond, &p->mutex);
176
177 if (p->die) break;
178
179 if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
180 ff_thread_finish_setup(avctx);
181
182 /* If a decoder supports hwaccel, then it must call ff_get_format().
183 * Since that call must happen before ff_thread_finish_setup(), the
184 * decoder is required to implement update_thread_context() and call
185 * ff_thread_finish_setup() manually. Therefore the above
186 * ff_thread_finish_setup() call did not happen and hwaccel_serializing
187 * cannot be true here. */
188 av_assert0(!p->hwaccel_serializing);
189
190 /* if the previous thread uses hwaccel then we take the lock to ensure
191 * the threads don't run concurrently */
192 if (avctx->hwaccel) {
193 pthread_mutex_lock(&p->parent->hwaccel_mutex);
194 p->hwaccel_serializing = 1;
195 }
196
197 av_frame_unref(p->frame);
198 p->got_frame = 0;
199 p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
200
201 if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
202 if (avctx->internal->allocate_progress)
203 av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
204 "free the frame on failure. This is a bug, please report it.\n");
205 av_frame_unref(p->frame);
206 }
207
208 if (atomic_load(&p->state) == STATE_SETTING_UP)
209 ff_thread_finish_setup(avctx);
210
211 if (p->hwaccel_serializing) {
212 p->hwaccel_serializing = 0;
213 pthread_mutex_unlock(&p->parent->hwaccel_mutex);
214 }
215
216 if (p->async_serializing) {
217 p->async_serializing = 0;
218
219 async_unlock(p->parent);
220 }
221
222 pthread_mutex_lock(&p->progress_mutex);
223
224 atomic_store(&p->state, STATE_INPUT_READY);
225
226 pthread_cond_broadcast(&p->progress_cond);
227 pthread_cond_signal(&p->output_cond);
228 pthread_mutex_unlock(&p->progress_mutex);
229 }
230 pthread_mutex_unlock(&p->mutex);
231
232 return NULL;
233}
234
235/**
236 * Update the next thread's AVCodecContext with values from the reference thread's context.
237 *
238 * @param dst The destination context.
239 * @param src The source context.
240 * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
241 * @return 0 on success, negative error code on failure
242 */
243static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
244{
245 int err = 0;
246
247 if (dst != src && (for_user || !(av_codec_get_codec_descriptor(src)->props & AV_CODEC_PROP_INTRA_ONLY))) {
248 dst->time_base = src->time_base;
249 dst->framerate = src->framerate;
250 dst->width = src->width;
251 dst->height = src->height;
252 dst->pix_fmt = src->pix_fmt;
253 dst->sw_pix_fmt = src->sw_pix_fmt;
254
255 dst->coded_width = src->coded_width;
256 dst->coded_height = src->coded_height;
257
258 dst->has_b_frames = src->has_b_frames;
259 dst->idct_algo = src->idct_algo;
260
261 dst->bits_per_coded_sample = src->bits_per_coded_sample;
262 dst->sample_aspect_ratio = src->sample_aspect_ratio;
263#if FF_API_AFD
264FF_DISABLE_DEPRECATION_WARNINGS
265 dst->dtg_active_format = src->dtg_active_format;
266FF_ENABLE_DEPRECATION_WARNINGS
267#endif /* FF_API_AFD */
268
269 dst->profile = src->profile;
270 dst->level = src->level;
271
272 dst->bits_per_raw_sample = src->bits_per_raw_sample;
273 dst->ticks_per_frame = src->ticks_per_frame;
274 dst->color_primaries = src->color_primaries;
275
276 dst->color_trc = src->color_trc;
277 dst->colorspace = src->colorspace;
278 dst->color_range = src->color_range;
279 dst->chroma_sample_location = src->chroma_sample_location;
280
281 dst->hwaccel = src->hwaccel;
282 dst->hwaccel_context = src->hwaccel_context;
283
284 dst->channels = src->channels;
285 dst->sample_rate = src->sample_rate;
286 dst->sample_fmt = src->sample_fmt;
287 dst->channel_layout = src->channel_layout;
288 dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
289
290 if (!!dst->hw_frames_ctx != !!src->hw_frames_ctx ||
291 (dst->hw_frames_ctx && dst->hw_frames_ctx->data != src->hw_frames_ctx->data)) {
292 av_buffer_unref(&dst->hw_frames_ctx);
293
294 if (src->hw_frames_ctx) {
295 dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
296 if (!dst->hw_frames_ctx)
297 return AVERROR(ENOMEM);
298 }
299 }
300
301 dst->hwaccel_flags = src->hwaccel_flags;
302 }
303
304 if (for_user) {
305 dst->delay = src->thread_count - 1;
306#if FF_API_CODED_FRAME
307FF_DISABLE_DEPRECATION_WARNINGS
308 dst->coded_frame = src->coded_frame;
309FF_ENABLE_DEPRECATION_WARNINGS
310#endif
311 } else {
312 if (dst->codec->update_thread_context)
313 err = dst->codec->update_thread_context(dst, src);
314 }
315
316 return err;
317}
318
319/**
320 * Update the next thread's AVCodecContext with values set by the user.
321 *
322 * @param dst The destination context.
323 * @param src The source context.
324 * @return 0 on success, negative error code on failure
325 */
326static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
327{
328#define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
329 dst->flags = src->flags;
330
331 dst->draw_horiz_band= src->draw_horiz_band;
332 dst->get_buffer2 = src->get_buffer2;
333
334 dst->opaque = src->opaque;
335 dst->debug = src->debug;
336 dst->debug_mv = src->debug_mv;
337
338 dst->slice_flags = src->slice_flags;
339 dst->flags2 = src->flags2;
340
341 copy_fields(skip_loop_filter, subtitle_header);
342
343 dst->frame_number = src->frame_number;
344 dst->reordered_opaque = src->reordered_opaque;
345 dst->thread_safe_callbacks = src->thread_safe_callbacks;
346
347 if (src->slice_count && src->slice_offset) {
348 if (dst->slice_count < src->slice_count) {
349 int err = av_reallocp_array(&dst->slice_offset, src->slice_count,
350 sizeof(*dst->slice_offset));
351 if (err < 0)
352 return err;
353 }
354 memcpy(dst->slice_offset, src->slice_offset,
355 src->slice_count * sizeof(*dst->slice_offset));
356 }
357 dst->slice_count = src->slice_count;
358 return 0;
359#undef copy_fields
360}
361
362/// Releases the buffers that this decoding thread was the last user of.
363static void release_delayed_buffers(PerThreadContext *p)
364{
365 FrameThreadContext *fctx = p->parent;
366
367 while (p->num_released_buffers > 0) {
368 AVFrame *f;
369
370 pthread_mutex_lock(&fctx->buffer_mutex);
371
372 // fix extended data in case the caller screwed it up
373 av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
374 p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
375 f = &p->released_buffers[--p->num_released_buffers];
376 f->extended_data = f->data;
377 av_frame_unref(f);
378
379 pthread_mutex_unlock(&fctx->buffer_mutex);
380 }
381}
382
383static int submit_packet(PerThreadContext *p, AVCodecContext *user_avctx,
384 AVPacket *avpkt)
385{
386 FrameThreadContext *fctx = p->parent;
387 PerThreadContext *prev_thread = fctx->prev_thread;
388 const AVCodec *codec = p->avctx->codec;
389 int ret;
390
391 if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY))
392 return 0;
393
394 pthread_mutex_lock(&p->mutex);
395
396 ret = update_context_from_user(p->avctx, user_avctx);
397 if (ret) {
398 pthread_mutex_unlock(&p->mutex);
399 return ret;
400 }
401
402 release_delayed_buffers(p);
403
404 if (prev_thread) {
405 int err;
406 if (atomic_load(&prev_thread->state) == STATE_SETTING_UP) {
407 pthread_mutex_lock(&prev_thread->progress_mutex);
408 while (atomic_load(&prev_thread->state) == STATE_SETTING_UP)
409 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
410 pthread_mutex_unlock(&prev_thread->progress_mutex);
411 }
412
413 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
414 if (err) {
415 pthread_mutex_unlock(&p->mutex);
416 return err;
417 }
418 }
419
420 av_packet_unref(&p->avpkt);
421 ret = av_packet_ref(&p->avpkt, avpkt);
422 if (ret < 0) {
423 pthread_mutex_unlock(&p->mutex);
424 av_log(p->avctx, AV_LOG_ERROR, "av_packet_ref() failed in submit_packet()\n");
425 return ret;
426 }
427
428 atomic_store(&p->state, STATE_SETTING_UP);
429 pthread_cond_signal(&p->input_cond);
430 pthread_mutex_unlock(&p->mutex);
431
432 /*
433 * If the client doesn't have a thread-safe get_buffer(),
434 * then decoding threads call back to the main thread,
435 * and it calls back to the client here.
436 */
437
438 if (!p->avctx->thread_safe_callbacks && (
439 p->avctx->get_format != avcodec_default_get_format ||
440 p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
441 while (atomic_load(&p->state) != STATE_SETUP_FINISHED && atomic_load(&p->state) != STATE_INPUT_READY) {
442 int call_done = 1;
443 pthread_mutex_lock(&p->progress_mutex);
444 while (atomic_load(&p->state) == STATE_SETTING_UP)
445 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
446
447 switch (atomic_load_explicit(&p->state, memory_order_acquire)) {
448 case STATE_GET_BUFFER:
449 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
450 break;
451 case STATE_GET_FORMAT:
452 p->result_format = ff_get_format(p->avctx, p->available_formats);
453 break;
454 default:
455 call_done = 0;
456 break;
457 }
458 if (call_done) {
459 atomic_store(&p->state, STATE_SETTING_UP);
460 pthread_cond_signal(&p->progress_cond);
461 }
462 pthread_mutex_unlock(&p->progress_mutex);
463 }
464 }
465
466 fctx->prev_thread = p;
467 fctx->next_decoding++;
468
469 return 0;
470}
471
472int ff_thread_decode_frame(AVCodecContext *avctx,
473 AVFrame *picture, int *got_picture_ptr,
474 AVPacket *avpkt)
475{
476 FrameThreadContext *fctx = avctx->internal->thread_ctx;
477 int finished = fctx->next_finished;
478 PerThreadContext *p;
479 int err;
480
481 /* release the async lock, permitting blocked hwaccel threads to
482 * go forward while we are in this function */
483 async_unlock(fctx);
484
485 /*
486 * Submit a packet to the next decoding thread.
487 */
488
489 p = &fctx->threads[fctx->next_decoding];
490 err = submit_packet(p, avctx, avpkt);
491 if (err)
492 goto finish;
493
494 /*
495 * If we're still receiving the initial packets, don't return a frame.
496 */
497
498 if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
499 fctx->delaying = 0;
500
501 if (fctx->delaying) {
502 *got_picture_ptr=0;
503 if (avpkt->size) {
504 err = avpkt->size;
505 goto finish;
506 }
507 }
508
509 /*
510 * Return the next available frame from the oldest thread.
511 * If we're at the end of the stream, then we have to skip threads that
512 * didn't output a frame, because we don't want to accidentally signal
513 * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
514 */
515
516 do {
517 p = &fctx->threads[finished++];
518
519 if (atomic_load(&p->state) != STATE_INPUT_READY) {
520 pthread_mutex_lock(&p->progress_mutex);
521 while (atomic_load_explicit(&p->state, memory_order_relaxed) != STATE_INPUT_READY)
522 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
523 pthread_mutex_unlock(&p->progress_mutex);
524 }
525
526 av_frame_move_ref(picture, p->frame);
527 *got_picture_ptr = p->got_frame;
528 picture->pkt_dts = p->avpkt.dts;
529
530 if (p->result < 0)
531 err = p->result;
532
533 /*
534 * A later call with avkpt->size == 0 may loop over all threads,
535 * including this one, searching for a frame to return before being
536 * stopped by the "finished != fctx->next_finished" condition.
537 * Make sure we don't mistakenly return the same frame again.
538 */
539 p->got_frame = 0;
540
541 if (finished >= avctx->thread_count) finished = 0;
542 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
543
544 update_context_from_thread(avctx, p->avctx, 1);
545
546 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
547
548 fctx->next_finished = finished;
549
550 /* return the size of the consumed packet if no error occurred */
551 if (err >= 0)
552 err = avpkt->size;
553finish:
554 async_lock(fctx);
555 return err;
556}
557
558void ff_thread_report_progress(ThreadFrame *f, int n, int field)
559{
560 PerThreadContext *p;
561 atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
562
563 if (!progress ||
564 atomic_load_explicit(&progress[field], memory_order_relaxed) >= n)
565 return;
566
567 p = f->owner[field]->internal->thread_ctx;
568
569 pthread_mutex_lock(&p->progress_mutex);
570 if (f->owner[field]->debug&FF_DEBUG_THREADS)
571 av_log(f->owner[field], AV_LOG_DEBUG,
572 "%p finished %d field %d\n", progress, n, field);
573
574 atomic_store_explicit(&progress[field], n, memory_order_release);
575
576 pthread_cond_broadcast(&p->progress_cond);
577 pthread_mutex_unlock(&p->progress_mutex);
578}
579
580void ff_thread_await_progress(ThreadFrame *f, int n, int field)
581{
582 PerThreadContext *p;
583 atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
584
585 if (!progress ||
586 atomic_load_explicit(&progress[field], memory_order_acquire) >= n)
587 return;
588
589 p = f->owner[field]->internal->thread_ctx;
590
591 pthread_mutex_lock(&p->progress_mutex);
592 if (f->owner[field]->debug&FF_DEBUG_THREADS)
593 av_log(f->owner[field], AV_LOG_DEBUG,
594 "thread awaiting %d field %d from %p\n", n, field, progress);
595 while (atomic_load_explicit(&progress[field], memory_order_relaxed) < n)
596 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
597 pthread_mutex_unlock(&p->progress_mutex);
598}
599
600void ff_thread_finish_setup(AVCodecContext *avctx) {
601 PerThreadContext *p = avctx->internal->thread_ctx;
602
603 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
604
605 if (avctx->hwaccel && !p->hwaccel_serializing) {
606 pthread_mutex_lock(&p->parent->hwaccel_mutex);
607 p->hwaccel_serializing = 1;
608 }
609
610 /* this assumes that no hwaccel calls happen before ff_thread_finish_setup() */
611 if (avctx->hwaccel &&
612 !(avctx->hwaccel->caps_internal & HWACCEL_CAP_ASYNC_SAFE)) {
613 p->async_serializing = 1;
614
615 async_lock(p->parent);
616 }
617
618 pthread_mutex_lock(&p->progress_mutex);
619 if(atomic_load(&p->state) == STATE_SETUP_FINISHED){
620 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
621 }
622
623 atomic_store(&p->state, STATE_SETUP_FINISHED);
624
625 pthread_cond_broadcast(&p->progress_cond);
626 pthread_mutex_unlock(&p->progress_mutex);
627}
628
629/// Waits for all threads to finish.
630static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
631{
632 int i;
633
634 async_unlock(fctx);
635
636 for (i = 0; i < thread_count; i++) {
637 PerThreadContext *p = &fctx->threads[i];
638
639 if (atomic_load(&p->state) != STATE_INPUT_READY) {
640 pthread_mutex_lock(&p->progress_mutex);
641 while (atomic_load(&p->state) != STATE_INPUT_READY)
642 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
643 pthread_mutex_unlock(&p->progress_mutex);
644 }
645 p->got_frame = 0;
646 }
647
648 async_lock(fctx);
649}
650
651void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
652{
653 FrameThreadContext *fctx = avctx->internal->thread_ctx;
654 const AVCodec *codec = avctx->codec;
655 int i;
656
657 park_frame_worker_threads(fctx, thread_count);
658
659 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
660 if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
661 av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
662 fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
663 fctx->threads->avctx->internal->is_copy = 1;
664 }
665
666 for (i = 0; i < thread_count; i++) {
667 PerThreadContext *p = &fctx->threads[i];
668
669 pthread_mutex_lock(&p->mutex);
670 p->die = 1;
671 pthread_cond_signal(&p->input_cond);
672 pthread_mutex_unlock(&p->mutex);
673
674 if (p->thread_init)
675 pthread_join(p->thread, NULL);
676 p->thread_init=0;
677
678 if (codec->close && p->avctx)
679 codec->close(p->avctx);
680
681 release_delayed_buffers(p);
682 av_frame_free(&p->frame);
683 }
684
685 for (i = 0; i < thread_count; i++) {
686 PerThreadContext *p = &fctx->threads[i];
687
688 pthread_mutex_destroy(&p->mutex);
689 pthread_mutex_destroy(&p->progress_mutex);
690 pthread_cond_destroy(&p->input_cond);
691 pthread_cond_destroy(&p->progress_cond);
692 pthread_cond_destroy(&p->output_cond);
693 av_packet_unref(&p->avpkt);
694 av_freep(&p->released_buffers);
695
696 if (i && p->avctx) {
697 av_freep(&p->avctx->priv_data);
698 av_freep(&p->avctx->slice_offset);
699 }
700
701 if (p->avctx) {
702 av_freep(&p->avctx->internal);
703 av_buffer_unref(&p->avctx->hw_frames_ctx);
704 }
705
706 av_freep(&p->avctx);
707 }
708
709 av_freep(&fctx->threads);
710 pthread_mutex_destroy(&fctx->buffer_mutex);
711 pthread_mutex_destroy(&fctx->hwaccel_mutex);
712 pthread_mutex_destroy(&fctx->async_mutex);
713 pthread_cond_destroy(&fctx->async_cond);
714
715 av_freep(&avctx->internal->thread_ctx);
716
717 if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
718 av_opt_free(avctx->priv_data);
719 avctx->codec = NULL;
720}
721
722int ff_frame_thread_init(AVCodecContext *avctx)
723{
724 int thread_count = avctx->thread_count;
725 const AVCodec *codec = avctx->codec;
726 AVCodecContext *src = avctx;
727 FrameThreadContext *fctx;
728 int i, err = 0;
729
730#if HAVE_W32THREADS
731 w32thread_init();
732#endif
733
734 if (!thread_count) {
735 int nb_cpus = av_cpu_count();
736 if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
737 nb_cpus = 1;
738 // use number of cores + 1 as thread count if there is more than one
739 if (nb_cpus > 1)
740 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
741 else
742 thread_count = avctx->thread_count = 1;
743 }
744
745 if (thread_count <= 1) {
746 avctx->active_thread_type = 0;
747 return 0;
748 }
749
750 avctx->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
751 if (!fctx)
752 return AVERROR(ENOMEM);
753
754 fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
755 if (!fctx->threads) {
756 av_freep(&avctx->internal->thread_ctx);
757 return AVERROR(ENOMEM);
758 }
759
760 pthread_mutex_init(&fctx->buffer_mutex, NULL);
761 pthread_mutex_init(&fctx->hwaccel_mutex, NULL);
762 pthread_mutex_init(&fctx->async_mutex, NULL);
763 pthread_cond_init(&fctx->async_cond, NULL);
764
765 fctx->async_lock = 1;
766 fctx->delaying = 1;
767
768 for (i = 0; i < thread_count; i++) {
769 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
770 PerThreadContext *p = &fctx->threads[i];
771
772 pthread_mutex_init(&p->mutex, NULL);
773 pthread_mutex_init(&p->progress_mutex, NULL);
774 pthread_cond_init(&p->input_cond, NULL);
775 pthread_cond_init(&p->progress_cond, NULL);
776 pthread_cond_init(&p->output_cond, NULL);
777
778 p->frame = av_frame_alloc();
779 if (!p->frame) {
780 av_freep(&copy);
781 err = AVERROR(ENOMEM);
782 goto error;
783 }
784
785 p->parent = fctx;
786 p->avctx = copy;
787
788 if (!copy) {
789 err = AVERROR(ENOMEM);
790 goto error;
791 }
792
793 *copy = *src;
794
795 copy->internal = av_malloc(sizeof(AVCodecInternal));
796 if (!copy->internal) {
797 copy->priv_data = NULL;
798 err = AVERROR(ENOMEM);
799 goto error;
800 }
801 *copy->internal = *src->internal;
802 copy->internal->thread_ctx = p;
803 copy->internal->pkt = &p->avpkt;
804
805 if (!i) {
806 src = copy;
807
808 if (codec->init)
809 err = codec->init(copy);
810
811 update_context_from_thread(avctx, copy, 1);
812 } else {
813 copy->priv_data = av_malloc(codec->priv_data_size);
814 if (!copy->priv_data) {
815 err = AVERROR(ENOMEM);
816 goto error;
817 }
818 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
819 copy->internal->is_copy = 1;
820
821 if (codec->init_thread_copy)
822 err = codec->init_thread_copy(copy);
823 }
824
825 if (err) goto error;
826
827 err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
828 p->thread_init= !err;
829 if(!p->thread_init)
830 goto error;
831 }
832
833 return 0;
834
835error:
836 ff_frame_thread_free(avctx, i+1);
837
838 return err;
839}
840
841void ff_thread_flush(AVCodecContext *avctx)
842{
843 int i;
844 FrameThreadContext *fctx = avctx->internal->thread_ctx;
845
846 if (!fctx) return;
847
848 park_frame_worker_threads(fctx, avctx->thread_count);
849 if (fctx->prev_thread) {
850 if (fctx->prev_thread != &fctx->threads[0])
851 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
852 }
853
854 fctx->next_decoding = fctx->next_finished = 0;
855 fctx->delaying = 1;
856 fctx->prev_thread = NULL;
857 for (i = 0; i < avctx->thread_count; i++) {
858 PerThreadContext *p = &fctx->threads[i];
859 // Make sure decode flush calls with size=0 won't return old frames
860 p->got_frame = 0;
861 av_frame_unref(p->frame);
862
863 release_delayed_buffers(p);
864
865 if (avctx->codec->flush)
866 avctx->codec->flush(p->avctx);
867 }
868}
869
870int ff_thread_can_start_frame(AVCodecContext *avctx)
871{
872 PerThreadContext *p = avctx->internal->thread_ctx;
873 if ((avctx->active_thread_type&FF_THREAD_FRAME) && atomic_load(&p->state) != STATE_SETTING_UP &&
874 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
875 return 0;
876 }
877 return 1;
878}
879
880static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
881{
882 PerThreadContext *p = avctx->internal->thread_ctx;
883 int err;
884
885 f->owner[0] = f->owner[1] = avctx;
886
887 ff_init_buffer_info(avctx, f->f);
888
889 if (!(avctx->active_thread_type & FF_THREAD_FRAME))
890 return ff_get_buffer(avctx, f->f, flags);
891
892 if (atomic_load(&p->state) != STATE_SETTING_UP &&
893 (avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
894 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
895 return -1;
896 }
897
898 if (avctx->internal->allocate_progress) {
899 atomic_int *progress;
900 f->progress = av_buffer_alloc(2 * sizeof(*progress));
901 if (!f->progress) {
902 return AVERROR(ENOMEM);
903 }
904 progress = (atomic_int*)f->progress->data;
905
906 atomic_init(&progress[0], -1);
907 atomic_init(&progress[1], -1);
908 }
909
910 pthread_mutex_lock(&p->parent->buffer_mutex);
911 if (avctx->thread_safe_callbacks ||
912 avctx->get_buffer2 == avcodec_default_get_buffer2) {
913 err = ff_get_buffer(avctx, f->f, flags);
914 } else {
915 pthread_mutex_lock(&p->progress_mutex);
916 p->requested_frame = f->f;
917 p->requested_flags = flags;
918 atomic_store_explicit(&p->state, STATE_GET_BUFFER, memory_order_release);
919 pthread_cond_broadcast(&p->progress_cond);
920
921 while (atomic_load(&p->state) != STATE_SETTING_UP)
922 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
923
924 err = p->result;
925
926 pthread_mutex_unlock(&p->progress_mutex);
927
928 }
929 if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
930 ff_thread_finish_setup(avctx);
931 if (err)
932 av_buffer_unref(&f->progress);
933
934 pthread_mutex_unlock(&p->parent->buffer_mutex);
935
936 return err;
937}
938
939enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
940{
941 enum AVPixelFormat res;
942 PerThreadContext *p = avctx->internal->thread_ctx;
943 if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
944 avctx->get_format == avcodec_default_get_format)
945 return ff_get_format(avctx, fmt);
946 if (atomic_load(&p->state) != STATE_SETTING_UP) {
947 av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
948 return -1;
949 }
950 pthread_mutex_lock(&p->progress_mutex);
951 p->available_formats = fmt;
952 atomic_store(&p->state, STATE_GET_FORMAT);
953 pthread_cond_broadcast(&p->progress_cond);
954
955 while (atomic_load(&p->state) != STATE_SETTING_UP)
956 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
957
958 res = p->result_format;
959
960 pthread_mutex_unlock(&p->progress_mutex);
961
962 return res;
963}
964
965int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
966{
967 int ret = thread_get_buffer_internal(avctx, f, flags);
968 if (ret < 0)
969 av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
970 return ret;
971}
972
973void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
974{
975 PerThreadContext *p = avctx->internal->thread_ctx;
976 FrameThreadContext *fctx;
977 AVFrame *dst, *tmp;
978 int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
979 avctx->thread_safe_callbacks ||
980 avctx->get_buffer2 == avcodec_default_get_buffer2;
981
982 if (!f->f || !f->f->buf[0])
983 return;
984
985 if (avctx->debug & FF_DEBUG_BUFFERS)
986 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
987
988 av_buffer_unref(&f->progress);
989 f->owner[0] = f->owner[1] = NULL;
990
991 if (can_direct_free) {
992 av_frame_unref(f->f);
993 return;
994 }
995
996 fctx = p->parent;
997 pthread_mutex_lock(&fctx->buffer_mutex);
998
999 if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
1000 goto fail;
1001 tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
1002 (p->num_released_buffers + 1) *
1003 sizeof(*p->released_buffers));
1004 if (!tmp)
1005 goto fail;
1006 p->released_buffers = tmp;
1007
1008 dst = &p->released_buffers[p->num_released_buffers];
1009 av_frame_move_ref(dst, f->f);
1010
1011 p->num_released_buffers++;
1012
1013fail:
1014 pthread_mutex_unlock(&fctx->buffer_mutex);
1015}
1016
generated by cgit at 2024-05-17 05:48:15 (GMT)