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00032 #include "config.h"
00033 #include "avcodec.h"
00034 #include "internal.h"
00035 #include "thread.h"
00036
00037 #if HAVE_PTHREADS
00038 #include <pthread.h>
00039 #elif HAVE_W32THREADS
00040 #include "w32pthreads.h"
00041 #elif HAVE_OS2THREADS
00042 #include "os2threads.h"
00043 #endif
00044
00045 typedef int (action_func)(AVCodecContext *c, void *arg);
00046 typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
00047
00048 typedef struct ThreadContext {
00049 pthread_t *workers;
00050 action_func *func;
00051 action_func2 *func2;
00052 void *args;
00053 int *rets;
00054 int rets_count;
00055 int job_count;
00056 int job_size;
00057
00058 pthread_cond_t last_job_cond;
00059 pthread_cond_t current_job_cond;
00060 pthread_mutex_t current_job_lock;
00061 int current_job;
00062 int done;
00063 } ThreadContext;
00064
00066 #define MAX_BUFFERS (32+1)
00067
00071 typedef struct PerThreadContext {
00072 struct FrameThreadContext *parent;
00073
00074 pthread_t thread;
00075 int thread_init;
00076 pthread_cond_t input_cond;
00077 pthread_cond_t progress_cond;
00078 pthread_cond_t output_cond;
00079
00080 pthread_mutex_t mutex;
00081 pthread_mutex_t progress_mutex;
00082
00083 AVCodecContext *avctx;
00084
00085 AVPacket avpkt;
00086 int allocated_buf_size;
00087
00088 AVFrame frame;
00089 int got_frame;
00090 int result;
00091
00092 enum {
00093 STATE_INPUT_READY,
00094 STATE_SETTING_UP,
00095 STATE_GET_BUFFER,
00099 STATE_SETUP_FINISHED
00100 } state;
00101
00106 AVFrame released_buffers[MAX_BUFFERS];
00107 int num_released_buffers;
00108
00112 int progress[MAX_BUFFERS][2];
00113 uint8_t progress_used[MAX_BUFFERS];
00114
00115 AVFrame *requested_frame;
00116 } PerThreadContext;
00117
00121 typedef struct FrameThreadContext {
00122 PerThreadContext *threads;
00123 PerThreadContext *prev_thread;
00124
00125 pthread_mutex_t buffer_mutex;
00126
00127 int next_decoding;
00128 int next_finished;
00129
00130 int delaying;
00135 int die;
00136 } FrameThreadContext;
00137
00138 static void* attribute_align_arg worker(void *v)
00139 {
00140 AVCodecContext *avctx = v;
00141 ThreadContext *c = avctx->thread_opaque;
00142 int our_job = c->job_count;
00143 int thread_count = avctx->thread_count;
00144 int self_id;
00145
00146 pthread_mutex_lock(&c->current_job_lock);
00147 self_id = c->current_job++;
00148 for (;;){
00149 while (our_job >= c->job_count) {
00150 if (c->current_job == thread_count + c->job_count)
00151 pthread_cond_signal(&c->last_job_cond);
00152
00153 pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
00154 our_job = self_id;
00155
00156 if (c->done) {
00157 pthread_mutex_unlock(&c->current_job_lock);
00158 return NULL;
00159 }
00160 }
00161 pthread_mutex_unlock(&c->current_job_lock);
00162
00163 c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
00164 c->func2(avctx, c->args, our_job, self_id);
00165
00166 pthread_mutex_lock(&c->current_job_lock);
00167 our_job = c->current_job++;
00168 }
00169 }
00170
00171 static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count)
00172 {
00173 pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
00174 pthread_mutex_unlock(&c->current_job_lock);
00175 }
00176
00177 static void thread_free(AVCodecContext *avctx)
00178 {
00179 ThreadContext *c = avctx->thread_opaque;
00180 int i;
00181
00182 pthread_mutex_lock(&c->current_job_lock);
00183 c->done = 1;
00184 pthread_cond_broadcast(&c->current_job_cond);
00185 pthread_mutex_unlock(&c->current_job_lock);
00186
00187 for (i=0; i<avctx->thread_count; i++)
00188 pthread_join(c->workers[i], NULL);
00189
00190 pthread_mutex_destroy(&c->current_job_lock);
00191 pthread_cond_destroy(&c->current_job_cond);
00192 pthread_cond_destroy(&c->last_job_cond);
00193 av_free(c->workers);
00194 av_freep(&avctx->thread_opaque);
00195 }
00196
00197 static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
00198 {
00199 ThreadContext *c= avctx->thread_opaque;
00200 int dummy_ret;
00201
00202 if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
00203 return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
00204
00205 if (job_count <= 0)
00206 return 0;
00207
00208 pthread_mutex_lock(&c->current_job_lock);
00209
00210 c->current_job = avctx->thread_count;
00211 c->job_count = job_count;
00212 c->job_size = job_size;
00213 c->args = arg;
00214 c->func = func;
00215 if (ret) {
00216 c->rets = ret;
00217 c->rets_count = job_count;
00218 } else {
00219 c->rets = &dummy_ret;
00220 c->rets_count = 1;
00221 }
00222 pthread_cond_broadcast(&c->current_job_cond);
00223
00224 avcodec_thread_park_workers(c, avctx->thread_count);
00225
00226 return 0;
00227 }
00228
00229 static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
00230 {
00231 ThreadContext *c= avctx->thread_opaque;
00232 c->func2 = func2;
00233 return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
00234 }
00235
00236 static int thread_init(AVCodecContext *avctx)
00237 {
00238 int i;
00239 ThreadContext *c;
00240 int thread_count = avctx->thread_count;
00241
00242 if (thread_count <= 1) {
00243 avctx->active_thread_type = 0;
00244 return 0;
00245 }
00246
00247 c = av_mallocz(sizeof(ThreadContext));
00248 if (!c)
00249 return -1;
00250
00251 c->workers = av_mallocz(sizeof(pthread_t)*thread_count);
00252 if (!c->workers) {
00253 av_free(c);
00254 return -1;
00255 }
00256
00257 avctx->thread_opaque = c;
00258 c->current_job = 0;
00259 c->job_count = 0;
00260 c->job_size = 0;
00261 c->done = 0;
00262 pthread_cond_init(&c->current_job_cond, NULL);
00263 pthread_cond_init(&c->last_job_cond, NULL);
00264 pthread_mutex_init(&c->current_job_lock, NULL);
00265 pthread_mutex_lock(&c->current_job_lock);
00266 for (i=0; i<thread_count; i++) {
00267 if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
00268 avctx->thread_count = i;
00269 pthread_mutex_unlock(&c->current_job_lock);
00270 ff_thread_free(avctx);
00271 return -1;
00272 }
00273 }
00274
00275 avcodec_thread_park_workers(c, thread_count);
00276
00277 avctx->execute = avcodec_thread_execute;
00278 avctx->execute2 = avcodec_thread_execute2;
00279 return 0;
00280 }
00281
00289 static attribute_align_arg void *frame_worker_thread(void *arg)
00290 {
00291 PerThreadContext *p = arg;
00292 FrameThreadContext *fctx = p->parent;
00293 AVCodecContext *avctx = p->avctx;
00294 AVCodec *codec = avctx->codec;
00295
00296 while (1) {
00297 if (p->state == STATE_INPUT_READY && !fctx->die) {
00298 pthread_mutex_lock(&p->mutex);
00299 while (p->state == STATE_INPUT_READY && !fctx->die)
00300 pthread_cond_wait(&p->input_cond, &p->mutex);
00301 pthread_mutex_unlock(&p->mutex);
00302 }
00303
00304 if (fctx->die) break;
00305
00306 if (!codec->update_thread_context && (avctx->thread_safe_callbacks || avctx->get_buffer == avcodec_default_get_buffer))
00307 ff_thread_finish_setup(avctx);
00308
00309 pthread_mutex_lock(&p->mutex);
00310 avcodec_get_frame_defaults(&p->frame);
00311 p->got_frame = 0;
00312 p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
00313
00314 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
00315
00316 p->state = STATE_INPUT_READY;
00317
00318 pthread_mutex_lock(&p->progress_mutex);
00319 pthread_cond_signal(&p->output_cond);
00320 pthread_mutex_unlock(&p->progress_mutex);
00321
00322 pthread_mutex_unlock(&p->mutex);
00323 }
00324
00325 return NULL;
00326 }
00327
00335 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
00336 {
00337 int err = 0;
00338
00339 if (dst != src) {
00340 dst->sub_id = src->sub_id;
00341 dst->time_base = src->time_base;
00342 dst->width = src->width;
00343 dst->height = src->height;
00344 dst->pix_fmt = src->pix_fmt;
00345
00346 dst->coded_width = src->coded_width;
00347 dst->coded_height = src->coded_height;
00348
00349 dst->has_b_frames = src->has_b_frames;
00350 dst->idct_algo = src->idct_algo;
00351 dst->slice_count = src->slice_count;
00352
00353 dst->bits_per_coded_sample = src->bits_per_coded_sample;
00354 dst->sample_aspect_ratio = src->sample_aspect_ratio;
00355 dst->dtg_active_format = src->dtg_active_format;
00356
00357 dst->profile = src->profile;
00358 dst->level = src->level;
00359
00360 dst->bits_per_raw_sample = src->bits_per_raw_sample;
00361 dst->ticks_per_frame = src->ticks_per_frame;
00362 dst->color_primaries = src->color_primaries;
00363
00364 dst->color_trc = src->color_trc;
00365 dst->colorspace = src->colorspace;
00366 dst->color_range = src->color_range;
00367 dst->chroma_sample_location = src->chroma_sample_location;
00368 }
00369
00370 if (for_user) {
00371 dst->delay = src->thread_count - 1;
00372 dst->coded_frame = src->coded_frame;
00373 } else {
00374 if (dst->codec->update_thread_context)
00375 err = dst->codec->update_thread_context(dst, src);
00376 }
00377
00378 return err;
00379 }
00380
00387 static void update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
00388 {
00389 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
00390 dst->flags = src->flags;
00391
00392 dst->draw_horiz_band= src->draw_horiz_band;
00393 dst->get_buffer = src->get_buffer;
00394 dst->release_buffer = src->release_buffer;
00395
00396 dst->opaque = src->opaque;
00397 dst->dsp_mask = src->dsp_mask;
00398 dst->debug = src->debug;
00399 dst->debug_mv = src->debug_mv;
00400
00401 dst->slice_flags = src->slice_flags;
00402 dst->flags2 = src->flags2;
00403
00404 copy_fields(skip_loop_filter, bidir_refine);
00405
00406 dst->frame_number = src->frame_number;
00407 dst->reordered_opaque = src->reordered_opaque;
00408 dst->thread_safe_callbacks = src->thread_safe_callbacks;
00409 #undef copy_fields
00410 }
00411
00412 static void free_progress(AVFrame *f)
00413 {
00414 PerThreadContext *p = f->owner->thread_opaque;
00415 int *progress = f->thread_opaque;
00416
00417 p->progress_used[(progress - p->progress[0]) / 2] = 0;
00418 }
00419
00421 static void release_delayed_buffers(PerThreadContext *p)
00422 {
00423 FrameThreadContext *fctx = p->parent;
00424
00425 while (p->num_released_buffers > 0) {
00426 AVFrame *f;
00427
00428 pthread_mutex_lock(&fctx->buffer_mutex);
00429 f = &p->released_buffers[--p->num_released_buffers];
00430 free_progress(f);
00431 f->thread_opaque = NULL;
00432
00433 f->owner->release_buffer(f->owner, f);
00434 pthread_mutex_unlock(&fctx->buffer_mutex);
00435 }
00436 }
00437
00438 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
00439 {
00440 FrameThreadContext *fctx = p->parent;
00441 PerThreadContext *prev_thread = fctx->prev_thread;
00442 AVCodec *codec = p->avctx->codec;
00443 uint8_t *buf = p->avpkt.data;
00444
00445 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
00446
00447 pthread_mutex_lock(&p->mutex);
00448
00449 release_delayed_buffers(p);
00450
00451 if (prev_thread) {
00452 int err;
00453 if (prev_thread->state == STATE_SETTING_UP) {
00454 pthread_mutex_lock(&prev_thread->progress_mutex);
00455 while (prev_thread->state == STATE_SETTING_UP)
00456 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
00457 pthread_mutex_unlock(&prev_thread->progress_mutex);
00458 }
00459
00460 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
00461 if (err) {
00462 pthread_mutex_unlock(&p->mutex);
00463 return err;
00464 }
00465 }
00466
00467 av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
00468 p->avpkt = *avpkt;
00469 p->avpkt.data = buf;
00470 memcpy(buf, avpkt->data, avpkt->size);
00471 memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00472
00473 p->state = STATE_SETTING_UP;
00474 pthread_cond_signal(&p->input_cond);
00475 pthread_mutex_unlock(&p->mutex);
00476
00477
00478
00479
00480
00481
00482
00483 if (!p->avctx->thread_safe_callbacks &&
00484 p->avctx->get_buffer != avcodec_default_get_buffer) {
00485 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
00486 pthread_mutex_lock(&p->progress_mutex);
00487 while (p->state == STATE_SETTING_UP)
00488 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00489
00490 if (p->state == STATE_GET_BUFFER) {
00491 p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
00492 p->state = STATE_SETTING_UP;
00493 pthread_cond_signal(&p->progress_cond);
00494 }
00495 pthread_mutex_unlock(&p->progress_mutex);
00496 }
00497 }
00498
00499 fctx->prev_thread = p;
00500 fctx->next_decoding++;
00501
00502 return 0;
00503 }
00504
00505 int ff_thread_decode_frame(AVCodecContext *avctx,
00506 AVFrame *picture, int *got_picture_ptr,
00507 AVPacket *avpkt)
00508 {
00509 FrameThreadContext *fctx = avctx->thread_opaque;
00510 int finished = fctx->next_finished;
00511 PerThreadContext *p;
00512 int err;
00513
00514
00515
00516
00517
00518 p = &fctx->threads[fctx->next_decoding];
00519 update_context_from_user(p->avctx, avctx);
00520 err = submit_packet(p, avpkt);
00521 if (err) return err;
00522
00523
00524
00525
00526
00527 if (fctx->delaying && avpkt->size) {
00528 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
00529
00530 *got_picture_ptr=0;
00531 return avpkt->size;
00532 }
00533
00534
00535
00536
00537
00538
00539
00540
00541 do {
00542 p = &fctx->threads[finished++];
00543
00544 if (p->state != STATE_INPUT_READY) {
00545 pthread_mutex_lock(&p->progress_mutex);
00546 while (p->state != STATE_INPUT_READY)
00547 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
00548 pthread_mutex_unlock(&p->progress_mutex);
00549 }
00550
00551 *picture = p->frame;
00552 *got_picture_ptr = p->got_frame;
00553 picture->pkt_dts = p->avpkt.dts;
00554
00555
00556
00557
00558
00559
00560
00561 p->got_frame = 0;
00562
00563 if (finished >= avctx->thread_count) finished = 0;
00564 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
00565
00566 update_context_from_thread(avctx, p->avctx, 1);
00567
00568 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
00569
00570 fctx->next_finished = finished;
00571
00572
00573 return (p->result >= 0) ? avpkt->size : p->result;
00574 }
00575
00576 void ff_thread_report_progress(AVFrame *f, int n, int field)
00577 {
00578 PerThreadContext *p;
00579 int *progress = f->thread_opaque;
00580
00581 if (!progress || progress[field] >= n) return;
00582
00583 p = f->owner->thread_opaque;
00584
00585 if (f->owner->debug&FF_DEBUG_THREADS)
00586 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
00587
00588 pthread_mutex_lock(&p->progress_mutex);
00589 progress[field] = n;
00590 pthread_cond_broadcast(&p->progress_cond);
00591 pthread_mutex_unlock(&p->progress_mutex);
00592 }
00593
00594 void ff_thread_await_progress(AVFrame *f, int n, int field)
00595 {
00596 PerThreadContext *p;
00597 int *progress = f->thread_opaque;
00598
00599 if (!progress || progress[field] >= n) return;
00600
00601 p = f->owner->thread_opaque;
00602
00603 if (f->owner->debug&FF_DEBUG_THREADS)
00604 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
00605
00606 pthread_mutex_lock(&p->progress_mutex);
00607 while (progress[field] < n)
00608 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00609 pthread_mutex_unlock(&p->progress_mutex);
00610 }
00611
00612 void ff_thread_finish_setup(AVCodecContext *avctx) {
00613 PerThreadContext *p = avctx->thread_opaque;
00614
00615 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
00616
00617 if(p->state == STATE_SETUP_FINISHED){
00618 av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
00619 }
00620
00621 pthread_mutex_lock(&p->progress_mutex);
00622 p->state = STATE_SETUP_FINISHED;
00623 pthread_cond_broadcast(&p->progress_cond);
00624 pthread_mutex_unlock(&p->progress_mutex);
00625 }
00626
00628 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
00629 {
00630 int i;
00631
00632 for (i = 0; i < thread_count; i++) {
00633 PerThreadContext *p = &fctx->threads[i];
00634
00635 if (p->state != STATE_INPUT_READY) {
00636 pthread_mutex_lock(&p->progress_mutex);
00637 while (p->state != STATE_INPUT_READY)
00638 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
00639 pthread_mutex_unlock(&p->progress_mutex);
00640 }
00641 }
00642 }
00643
00644 static void frame_thread_free(AVCodecContext *avctx, int thread_count)
00645 {
00646 FrameThreadContext *fctx = avctx->thread_opaque;
00647 AVCodec *codec = avctx->codec;
00648 int i;
00649
00650 park_frame_worker_threads(fctx, thread_count);
00651
00652 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
00653 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
00654
00655 fctx->die = 1;
00656
00657 for (i = 0; i < thread_count; i++) {
00658 PerThreadContext *p = &fctx->threads[i];
00659
00660 pthread_mutex_lock(&p->mutex);
00661 pthread_cond_signal(&p->input_cond);
00662 pthread_mutex_unlock(&p->mutex);
00663
00664 if (p->thread_init)
00665 pthread_join(p->thread, NULL);
00666 p->thread_init=0;
00667
00668 if (codec->close)
00669 codec->close(p->avctx);
00670
00671 avctx->codec = NULL;
00672
00673 release_delayed_buffers(p);
00674 }
00675
00676 for (i = 0; i < thread_count; i++) {
00677 PerThreadContext *p = &fctx->threads[i];
00678
00679 avcodec_default_free_buffers(p->avctx);
00680
00681 pthread_mutex_destroy(&p->mutex);
00682 pthread_mutex_destroy(&p->progress_mutex);
00683 pthread_cond_destroy(&p->input_cond);
00684 pthread_cond_destroy(&p->progress_cond);
00685 pthread_cond_destroy(&p->output_cond);
00686 av_freep(&p->avpkt.data);
00687
00688 if (i) {
00689 av_freep(&p->avctx->priv_data);
00690 av_freep(&p->avctx->internal);
00691 }
00692
00693 av_freep(&p->avctx);
00694 }
00695
00696 av_freep(&fctx->threads);
00697 pthread_mutex_destroy(&fctx->buffer_mutex);
00698 av_freep(&avctx->thread_opaque);
00699 }
00700
00701 static int frame_thread_init(AVCodecContext *avctx)
00702 {
00703 int thread_count = avctx->thread_count;
00704 AVCodec *codec = avctx->codec;
00705 AVCodecContext *src = avctx;
00706 FrameThreadContext *fctx;
00707 int i, err = 0;
00708
00709 if (thread_count <= 1) {
00710 avctx->active_thread_type = 0;
00711 return 0;
00712 }
00713
00714 avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
00715
00716 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
00717 pthread_mutex_init(&fctx->buffer_mutex, NULL);
00718 fctx->delaying = 1;
00719
00720 for (i = 0; i < thread_count; i++) {
00721 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
00722 PerThreadContext *p = &fctx->threads[i];
00723
00724 pthread_mutex_init(&p->mutex, NULL);
00725 pthread_mutex_init(&p->progress_mutex, NULL);
00726 pthread_cond_init(&p->input_cond, NULL);
00727 pthread_cond_init(&p->progress_cond, NULL);
00728 pthread_cond_init(&p->output_cond, NULL);
00729
00730 p->parent = fctx;
00731 p->avctx = copy;
00732
00733 if (!copy) {
00734 err = AVERROR(ENOMEM);
00735 goto error;
00736 }
00737
00738 *copy = *src;
00739 copy->thread_opaque = p;
00740 copy->pkt = &p->avpkt;
00741
00742 if (!i) {
00743 src = copy;
00744
00745 if (codec->init)
00746 err = codec->init(copy);
00747
00748 update_context_from_thread(avctx, copy, 1);
00749 } else {
00750 copy->priv_data = av_malloc(codec->priv_data_size);
00751 if (!copy->priv_data) {
00752 err = AVERROR(ENOMEM);
00753 goto error;
00754 }
00755 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
00756 copy->internal = av_malloc(sizeof(AVCodecInternal));
00757 if (!copy->internal) {
00758 err = AVERROR(ENOMEM);
00759 goto error;
00760 }
00761 *(copy->internal) = *(src->internal);
00762 copy->internal->is_copy = 1;
00763
00764 if (codec->init_thread_copy)
00765 err = codec->init_thread_copy(copy);
00766 }
00767
00768 if (err) goto error;
00769
00770 p->thread_init= !pthread_create(&p->thread, NULL, frame_worker_thread, p);
00771 if(!p->thread_init)
00772 goto error;
00773 }
00774
00775 return 0;
00776
00777 error:
00778 frame_thread_free(avctx, i+1);
00779
00780 return err;
00781 }
00782
00783 void ff_thread_flush(AVCodecContext *avctx)
00784 {
00785 FrameThreadContext *fctx = avctx->thread_opaque;
00786
00787 if (!avctx->thread_opaque) return;
00788
00789 park_frame_worker_threads(fctx, avctx->thread_count);
00790 if (fctx->prev_thread) {
00791 if (fctx->prev_thread != &fctx->threads[0])
00792 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
00793 if (avctx->codec->flush)
00794 avctx->codec->flush(fctx->threads[0].avctx);
00795 }
00796
00797 fctx->next_decoding = fctx->next_finished = 0;
00798 fctx->delaying = 1;
00799 fctx->prev_thread = NULL;
00800 }
00801
00802 static int *allocate_progress(PerThreadContext *p)
00803 {
00804 int i;
00805
00806 for (i = 0; i < MAX_BUFFERS; i++)
00807 if (!p->progress_used[i]) break;
00808
00809 if (i == MAX_BUFFERS) {
00810 av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n");
00811 return NULL;
00812 }
00813
00814 p->progress_used[i] = 1;
00815
00816 return p->progress[i];
00817 }
00818
00819 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
00820 {
00821 PerThreadContext *p = avctx->thread_opaque;
00822 int *progress, err;
00823
00824 f->owner = avctx;
00825
00826 ff_init_buffer_info(avctx, f);
00827
00828 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
00829 f->thread_opaque = NULL;
00830 return avctx->get_buffer(avctx, f);
00831 }
00832
00833 if (p->state != STATE_SETTING_UP &&
00834 (avctx->codec->update_thread_context || (!avctx->thread_safe_callbacks &&
00835 avctx->get_buffer != avcodec_default_get_buffer))) {
00836 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
00837 return -1;
00838 }
00839
00840 pthread_mutex_lock(&p->parent->buffer_mutex);
00841 f->thread_opaque = progress = allocate_progress(p);
00842
00843 if (!progress) {
00844 pthread_mutex_unlock(&p->parent->buffer_mutex);
00845 return -1;
00846 }
00847
00848 progress[0] =
00849 progress[1] = -1;
00850
00851 if (avctx->thread_safe_callbacks ||
00852 avctx->get_buffer == avcodec_default_get_buffer) {
00853 err = avctx->get_buffer(avctx, f);
00854 } else {
00855 p->requested_frame = f;
00856 p->state = STATE_GET_BUFFER;
00857 pthread_mutex_lock(&p->progress_mutex);
00858 pthread_cond_signal(&p->progress_cond);
00859
00860 while (p->state != STATE_SETTING_UP)
00861 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00862
00863 err = p->result;
00864
00865 pthread_mutex_unlock(&p->progress_mutex);
00866
00867 if (!avctx->codec->update_thread_context)
00868 ff_thread_finish_setup(avctx);
00869 }
00870
00871 pthread_mutex_unlock(&p->parent->buffer_mutex);
00872
00873
00874
00875
00876
00877
00878 f->age = INT_MAX;
00879
00880 return err;
00881 }
00882
00883 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
00884 {
00885 PerThreadContext *p = avctx->thread_opaque;
00886 FrameThreadContext *fctx;
00887
00888 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
00889 avctx->release_buffer(avctx, f);
00890 return;
00891 }
00892
00893 if (p->num_released_buffers >= MAX_BUFFERS) {
00894 av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n");
00895 return;
00896 }
00897
00898 if(avctx->debug & FF_DEBUG_BUFFERS)
00899 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
00900
00901 fctx = p->parent;
00902 pthread_mutex_lock(&fctx->buffer_mutex);
00903 p->released_buffers[p->num_released_buffers++] = *f;
00904 pthread_mutex_unlock(&fctx->buffer_mutex);
00905 memset(f->data, 0, sizeof(f->data));
00906 }
00907
00917 static void validate_thread_parameters(AVCodecContext *avctx)
00918 {
00919 int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
00920 && !(avctx->flags & CODEC_FLAG_TRUNCATED)
00921 && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
00922 && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
00923 if (avctx->thread_count == 1) {
00924 avctx->active_thread_type = 0;
00925 } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
00926 avctx->active_thread_type = FF_THREAD_FRAME;
00927 } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
00928 avctx->thread_type & FF_THREAD_SLICE) {
00929 avctx->active_thread_type = FF_THREAD_SLICE;
00930 }
00931 }
00932
00933 int ff_thread_init(AVCodecContext *avctx)
00934 {
00935 if (avctx->thread_opaque) {
00936 av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
00937 return -1;
00938 }
00939
00940 #if HAVE_W32THREADS
00941 w32thread_init();
00942 #endif
00943
00944 if (avctx->codec) {
00945 validate_thread_parameters(avctx);
00946
00947 if (avctx->active_thread_type&FF_THREAD_SLICE)
00948 return thread_init(avctx);
00949 else if (avctx->active_thread_type&FF_THREAD_FRAME)
00950 return frame_thread_init(avctx);
00951 }
00952
00953 return 0;
00954 }
00955
00956 void ff_thread_free(AVCodecContext *avctx)
00957 {
00958 if (avctx->active_thread_type&FF_THREAD_FRAME)
00959 frame_thread_free(avctx, avctx->thread_count);
00960 else
00961 thread_free(avctx);
00962 }