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00032 #include "config.h"
00033
00034 #if HAVE_SCHED_GETAFFINITY
00035 #define _GNU_SOURCE
00036 #include <sched.h>
00037 #endif
00038 #if HAVE_GETPROCESSAFFINITYMASK
00039 #include <windows.h>
00040 #endif
00041 #if HAVE_SYSCTL
00042 #if HAVE_SYS_PARAM_H
00043 #include <sys/param.h>
00044 #endif
00045 #include <sys/types.h>
00046 #include <sys/sysctl.h>
00047 #endif
00048 #if HAVE_SYSCONF
00049 #include <unistd.h>
00050 #endif
00051
00052 #include "avcodec.h"
00053 #include "internal.h"
00054 #include "thread.h"
00055
00056 #if HAVE_PTHREADS
00057 #include <pthread.h>
00058 #elif HAVE_W32THREADS
00059 #include "w32pthreads.h"
00060 #endif
00061
00062 typedef int (action_func)(AVCodecContext *c, void *arg);
00063 typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
00064
00065 typedef struct ThreadContext {
00066 pthread_t *workers;
00067 action_func *func;
00068 action_func2 *func2;
00069 void *args;
00070 int *rets;
00071 int rets_count;
00072 int job_count;
00073 int job_size;
00074
00075 pthread_cond_t last_job_cond;
00076 pthread_cond_t current_job_cond;
00077 pthread_mutex_t current_job_lock;
00078 int current_job;
00079 int done;
00080 } ThreadContext;
00081
00083 #define MAX_BUFFERS (32+1)
00084
00088 typedef struct PerThreadContext {
00089 struct FrameThreadContext *parent;
00090
00091 pthread_t thread;
00092 int thread_init;
00093 pthread_cond_t input_cond;
00094 pthread_cond_t progress_cond;
00095 pthread_cond_t output_cond;
00096
00097 pthread_mutex_t mutex;
00098 pthread_mutex_t progress_mutex;
00099
00100 AVCodecContext *avctx;
00101
00102 AVPacket avpkt;
00103 int allocated_buf_size;
00104
00105 AVFrame frame;
00106 int got_frame;
00107 int result;
00108
00109 enum {
00110 STATE_INPUT_READY,
00111 STATE_SETTING_UP,
00112 STATE_GET_BUFFER,
00116 STATE_SETUP_FINISHED
00117 } state;
00118
00123 AVFrame released_buffers[MAX_BUFFERS];
00124 int num_released_buffers;
00125
00129 int progress[MAX_BUFFERS][2];
00130 uint8_t progress_used[MAX_BUFFERS];
00131
00132 AVFrame *requested_frame;
00133 } PerThreadContext;
00134
00138 typedef struct FrameThreadContext {
00139 PerThreadContext *threads;
00140 PerThreadContext *prev_thread;
00141
00142 pthread_mutex_t buffer_mutex;
00143
00144 int next_decoding;
00145 int next_finished;
00146
00147 int delaying;
00152 int die;
00153 } FrameThreadContext;
00154
00155
00156
00157
00158 #define MAX_AUTO_THREADS 16
00159
00160 static int get_logical_cpus(AVCodecContext *avctx)
00161 {
00162 int ret, nb_cpus = 1;
00163 #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
00164 cpu_set_t cpuset;
00165
00166 CPU_ZERO(&cpuset);
00167
00168 ret = sched_getaffinity(0, sizeof(cpuset), &cpuset);
00169 if (!ret) {
00170 nb_cpus = CPU_COUNT(&cpuset);
00171 }
00172 #elif HAVE_GETPROCESSAFFINITYMASK
00173 DWORD_PTR proc_aff, sys_aff;
00174 ret = GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff);
00175 if (ret)
00176 nb_cpus = av_popcount64(proc_aff);
00177 #elif HAVE_SYSCTL && defined(HW_NCPU)
00178 int mib[2] = { CTL_HW, HW_NCPU };
00179 size_t len = sizeof(nb_cpus);
00180
00181 ret = sysctl(mib, 2, &nb_cpus, &len, NULL, 0);
00182 if (ret == -1)
00183 nb_cpus = 0;
00184 #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
00185 nb_cpus = sysconf(_SC_NPROC_ONLN);
00186 #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
00187 nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
00188 #endif
00189 av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
00190 return nb_cpus;
00191 }
00192
00193
00194 static void* attribute_align_arg worker(void *v)
00195 {
00196 AVCodecContext *avctx = v;
00197 ThreadContext *c = avctx->thread_opaque;
00198 int our_job = c->job_count;
00199 int thread_count = avctx->thread_count;
00200 int self_id;
00201
00202 pthread_mutex_lock(&c->current_job_lock);
00203 self_id = c->current_job++;
00204 for (;;){
00205 while (our_job >= c->job_count) {
00206 if (c->current_job == thread_count + c->job_count)
00207 pthread_cond_signal(&c->last_job_cond);
00208
00209 pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
00210 our_job = self_id;
00211
00212 if (c->done) {
00213 pthread_mutex_unlock(&c->current_job_lock);
00214 return NULL;
00215 }
00216 }
00217 pthread_mutex_unlock(&c->current_job_lock);
00218
00219 c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
00220 c->func2(avctx, c->args, our_job, self_id);
00221
00222 pthread_mutex_lock(&c->current_job_lock);
00223 our_job = c->current_job++;
00224 }
00225 }
00226
00227 static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count)
00228 {
00229 pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
00230 pthread_mutex_unlock(&c->current_job_lock);
00231 }
00232
00233 static void thread_free(AVCodecContext *avctx)
00234 {
00235 ThreadContext *c = avctx->thread_opaque;
00236 int i;
00237
00238 pthread_mutex_lock(&c->current_job_lock);
00239 c->done = 1;
00240 pthread_cond_broadcast(&c->current_job_cond);
00241 pthread_mutex_unlock(&c->current_job_lock);
00242
00243 for (i=0; i<avctx->thread_count; i++)
00244 pthread_join(c->workers[i], NULL);
00245
00246 pthread_mutex_destroy(&c->current_job_lock);
00247 pthread_cond_destroy(&c->current_job_cond);
00248 pthread_cond_destroy(&c->last_job_cond);
00249 av_free(c->workers);
00250 av_freep(&avctx->thread_opaque);
00251 }
00252
00253 static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
00254 {
00255 ThreadContext *c= avctx->thread_opaque;
00256 int dummy_ret;
00257
00258 if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
00259 return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
00260
00261 if (job_count <= 0)
00262 return 0;
00263
00264 pthread_mutex_lock(&c->current_job_lock);
00265
00266 c->current_job = avctx->thread_count;
00267 c->job_count = job_count;
00268 c->job_size = job_size;
00269 c->args = arg;
00270 c->func = func;
00271 if (ret) {
00272 c->rets = ret;
00273 c->rets_count = job_count;
00274 } else {
00275 c->rets = &dummy_ret;
00276 c->rets_count = 1;
00277 }
00278 pthread_cond_broadcast(&c->current_job_cond);
00279
00280 avcodec_thread_park_workers(c, avctx->thread_count);
00281
00282 return 0;
00283 }
00284
00285 static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
00286 {
00287 ThreadContext *c= avctx->thread_opaque;
00288 c->func2 = func2;
00289 return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
00290 }
00291
00292 static int thread_init(AVCodecContext *avctx)
00293 {
00294 int i;
00295 ThreadContext *c;
00296 int thread_count = avctx->thread_count;
00297
00298 if (!thread_count) {
00299 int nb_cpus = get_logical_cpus(avctx);
00300
00301 if (nb_cpus > 1)
00302 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
00303 else
00304 thread_count = avctx->thread_count = 1;
00305 }
00306
00307 if (thread_count <= 1) {
00308 avctx->active_thread_type = 0;
00309 return 0;
00310 }
00311
00312 c = av_mallocz(sizeof(ThreadContext));
00313 if (!c)
00314 return -1;
00315
00316 c->workers = av_mallocz(sizeof(pthread_t)*thread_count);
00317 if (!c->workers) {
00318 av_free(c);
00319 return -1;
00320 }
00321
00322 avctx->thread_opaque = c;
00323 c->current_job = 0;
00324 c->job_count = 0;
00325 c->job_size = 0;
00326 c->done = 0;
00327 pthread_cond_init(&c->current_job_cond, NULL);
00328 pthread_cond_init(&c->last_job_cond, NULL);
00329 pthread_mutex_init(&c->current_job_lock, NULL);
00330 pthread_mutex_lock(&c->current_job_lock);
00331 for (i=0; i<thread_count; i++) {
00332 if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
00333 avctx->thread_count = i;
00334 pthread_mutex_unlock(&c->current_job_lock);
00335 ff_thread_free(avctx);
00336 return -1;
00337 }
00338 }
00339
00340 avcodec_thread_park_workers(c, thread_count);
00341
00342 avctx->execute = avcodec_thread_execute;
00343 avctx->execute2 = avcodec_thread_execute2;
00344 return 0;
00345 }
00346
00354 static attribute_align_arg void *frame_worker_thread(void *arg)
00355 {
00356 PerThreadContext *p = arg;
00357 FrameThreadContext *fctx = p->parent;
00358 AVCodecContext *avctx = p->avctx;
00359 AVCodec *codec = avctx->codec;
00360
00361 while (1) {
00362 if (p->state == STATE_INPUT_READY && !fctx->die) {
00363 pthread_mutex_lock(&p->mutex);
00364 while (p->state == STATE_INPUT_READY && !fctx->die)
00365 pthread_cond_wait(&p->input_cond, &p->mutex);
00366 pthread_mutex_unlock(&p->mutex);
00367 }
00368
00369 if (fctx->die) break;
00370
00371 if (!codec->update_thread_context && avctx->thread_safe_callbacks)
00372 ff_thread_finish_setup(avctx);
00373
00374 pthread_mutex_lock(&p->mutex);
00375 avcodec_get_frame_defaults(&p->frame);
00376 p->got_frame = 0;
00377 p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
00378
00379 if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
00380
00381 p->state = STATE_INPUT_READY;
00382
00383 pthread_mutex_lock(&p->progress_mutex);
00384 pthread_cond_signal(&p->output_cond);
00385 pthread_mutex_unlock(&p->progress_mutex);
00386
00387 pthread_mutex_unlock(&p->mutex);
00388 }
00389
00390 return NULL;
00391 }
00392
00400 static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
00401 {
00402 int err = 0;
00403
00404 if (dst != src) {
00405 dst->sub_id = src->sub_id;
00406 dst->time_base = src->time_base;
00407 dst->width = src->width;
00408 dst->height = src->height;
00409 dst->pix_fmt = src->pix_fmt;
00410
00411 dst->coded_width = src->coded_width;
00412 dst->coded_height = src->coded_height;
00413
00414 dst->has_b_frames = src->has_b_frames;
00415 dst->idct_algo = src->idct_algo;
00416
00417 dst->bits_per_coded_sample = src->bits_per_coded_sample;
00418 dst->sample_aspect_ratio = src->sample_aspect_ratio;
00419 dst->dtg_active_format = src->dtg_active_format;
00420
00421 dst->profile = src->profile;
00422 dst->level = src->level;
00423
00424 dst->bits_per_raw_sample = src->bits_per_raw_sample;
00425 dst->ticks_per_frame = src->ticks_per_frame;
00426 dst->color_primaries = src->color_primaries;
00427
00428 dst->color_trc = src->color_trc;
00429 dst->colorspace = src->colorspace;
00430 dst->color_range = src->color_range;
00431 dst->chroma_sample_location = src->chroma_sample_location;
00432 }
00433
00434 if (for_user) {
00435 dst->coded_frame = src->coded_frame;
00436 } else {
00437 if (dst->codec->update_thread_context)
00438 err = dst->codec->update_thread_context(dst, src);
00439 }
00440
00441 return err;
00442 }
00443
00451 static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
00452 {
00453 #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
00454 dst->flags = src->flags;
00455
00456 dst->draw_horiz_band= src->draw_horiz_band;
00457 dst->get_buffer = src->get_buffer;
00458 dst->release_buffer = src->release_buffer;
00459
00460 dst->opaque = src->opaque;
00461 dst->dsp_mask = src->dsp_mask;
00462 dst->debug = src->debug;
00463 dst->debug_mv = src->debug_mv;
00464
00465 dst->slice_flags = src->slice_flags;
00466 dst->flags2 = src->flags2;
00467
00468 copy_fields(skip_loop_filter, bidir_refine);
00469
00470 dst->frame_number = src->frame_number;
00471 dst->reordered_opaque = src->reordered_opaque;
00472
00473 if (src->slice_count && src->slice_offset) {
00474 if (dst->slice_count < src->slice_count) {
00475 int *tmp = av_realloc(dst->slice_offset, src->slice_count *
00476 sizeof(*dst->slice_offset));
00477 if (!tmp) {
00478 av_free(dst->slice_offset);
00479 return AVERROR(ENOMEM);
00480 }
00481 dst->slice_offset = tmp;
00482 }
00483 memcpy(dst->slice_offset, src->slice_offset,
00484 src->slice_count * sizeof(*dst->slice_offset));
00485 }
00486 dst->slice_count = src->slice_count;
00487 return 0;
00488 #undef copy_fields
00489 }
00490
00491 static void free_progress(AVFrame *f)
00492 {
00493 PerThreadContext *p = f->owner->thread_opaque;
00494 int *progress = f->thread_opaque;
00495
00496 p->progress_used[(progress - p->progress[0]) / 2] = 0;
00497 }
00498
00500 static void release_delayed_buffers(PerThreadContext *p)
00501 {
00502 FrameThreadContext *fctx = p->parent;
00503
00504 while (p->num_released_buffers > 0) {
00505 AVFrame *f;
00506
00507 pthread_mutex_lock(&fctx->buffer_mutex);
00508 f = &p->released_buffers[--p->num_released_buffers];
00509 free_progress(f);
00510 f->thread_opaque = NULL;
00511
00512 f->owner->release_buffer(f->owner, f);
00513 pthread_mutex_unlock(&fctx->buffer_mutex);
00514 }
00515 }
00516
00517 static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
00518 {
00519 FrameThreadContext *fctx = p->parent;
00520 PerThreadContext *prev_thread = fctx->prev_thread;
00521 AVCodec *codec = p->avctx->codec;
00522 uint8_t *buf = p->avpkt.data;
00523
00524 if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
00525
00526 pthread_mutex_lock(&p->mutex);
00527
00528 release_delayed_buffers(p);
00529
00530 if (prev_thread) {
00531 int err;
00532 if (prev_thread->state == STATE_SETTING_UP) {
00533 pthread_mutex_lock(&prev_thread->progress_mutex);
00534 while (prev_thread->state == STATE_SETTING_UP)
00535 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
00536 pthread_mutex_unlock(&prev_thread->progress_mutex);
00537 }
00538
00539 err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
00540 if (err) {
00541 pthread_mutex_unlock(&p->mutex);
00542 return err;
00543 }
00544 }
00545
00546 av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
00547 p->avpkt = *avpkt;
00548 p->avpkt.data = buf;
00549 memcpy(buf, avpkt->data, avpkt->size);
00550 memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00551
00552 p->state = STATE_SETTING_UP;
00553 pthread_cond_signal(&p->input_cond);
00554 pthread_mutex_unlock(&p->mutex);
00555
00556
00557
00558
00559
00560
00561
00562 if (!p->avctx->thread_safe_callbacks &&
00563 p->avctx->get_buffer != avcodec_default_get_buffer) {
00564 while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
00565 pthread_mutex_lock(&p->progress_mutex);
00566 while (p->state == STATE_SETTING_UP)
00567 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00568
00569 if (p->state == STATE_GET_BUFFER) {
00570 p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
00571 p->state = STATE_SETTING_UP;
00572 pthread_cond_signal(&p->progress_cond);
00573 }
00574 pthread_mutex_unlock(&p->progress_mutex);
00575 }
00576 }
00577
00578 fctx->prev_thread = p;
00579 fctx->next_decoding++;
00580
00581 return 0;
00582 }
00583
00584 int ff_thread_decode_frame(AVCodecContext *avctx,
00585 AVFrame *picture, int *got_picture_ptr,
00586 AVPacket *avpkt)
00587 {
00588 FrameThreadContext *fctx = avctx->thread_opaque;
00589 int finished = fctx->next_finished;
00590 PerThreadContext *p;
00591 int err;
00592
00593
00594
00595
00596
00597 p = &fctx->threads[fctx->next_decoding];
00598 err = update_context_from_user(p->avctx, avctx);
00599 if (err) return err;
00600 err = submit_packet(p, avpkt);
00601 if (err) return err;
00602
00603
00604
00605
00606
00607 if (fctx->delaying && avpkt->size) {
00608 if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
00609
00610 *got_picture_ptr=0;
00611 return avpkt->size;
00612 }
00613
00614
00615
00616
00617
00618
00619
00620
00621 do {
00622 p = &fctx->threads[finished++];
00623
00624 if (p->state != STATE_INPUT_READY) {
00625 pthread_mutex_lock(&p->progress_mutex);
00626 while (p->state != STATE_INPUT_READY)
00627 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
00628 pthread_mutex_unlock(&p->progress_mutex);
00629 }
00630
00631 *picture = p->frame;
00632 *got_picture_ptr = p->got_frame;
00633 picture->pkt_dts = p->avpkt.dts;
00634 picture->sample_aspect_ratio = p->avctx->sample_aspect_ratio;
00635 picture->width = p->avctx->width;
00636 picture->height = p->avctx->height;
00637 picture->format = p->avctx->pix_fmt;
00638
00639
00640
00641
00642
00643
00644
00645 p->got_frame = 0;
00646
00647 if (finished >= avctx->thread_count) finished = 0;
00648 } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
00649
00650 update_context_from_thread(avctx, p->avctx, 1);
00651
00652 if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
00653
00654 fctx->next_finished = finished;
00655
00656
00657 return (p->result >= 0) ? avpkt->size : p->result;
00658 }
00659
00660 void ff_thread_report_progress(AVFrame *f, int n, int field)
00661 {
00662 PerThreadContext *p;
00663 int *progress = f->thread_opaque;
00664
00665 if (!progress || progress[field] >= n) return;
00666
00667 p = f->owner->thread_opaque;
00668
00669 if (f->owner->debug&FF_DEBUG_THREADS)
00670 av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
00671
00672 pthread_mutex_lock(&p->progress_mutex);
00673 progress[field] = n;
00674 pthread_cond_broadcast(&p->progress_cond);
00675 pthread_mutex_unlock(&p->progress_mutex);
00676 }
00677
00678 void ff_thread_await_progress(AVFrame *f, int n, int field)
00679 {
00680 PerThreadContext *p;
00681 int *progress = f->thread_opaque;
00682
00683 if (!progress || progress[field] >= n) return;
00684
00685 p = f->owner->thread_opaque;
00686
00687 if (f->owner->debug&FF_DEBUG_THREADS)
00688 av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
00689
00690 pthread_mutex_lock(&p->progress_mutex);
00691 while (progress[field] < n)
00692 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00693 pthread_mutex_unlock(&p->progress_mutex);
00694 }
00695
00696 void ff_thread_finish_setup(AVCodecContext *avctx) {
00697 PerThreadContext *p = avctx->thread_opaque;
00698
00699 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
00700
00701 pthread_mutex_lock(&p->progress_mutex);
00702 p->state = STATE_SETUP_FINISHED;
00703 pthread_cond_broadcast(&p->progress_cond);
00704 pthread_mutex_unlock(&p->progress_mutex);
00705 }
00706
00708 static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
00709 {
00710 int i;
00711
00712 for (i = 0; i < thread_count; i++) {
00713 PerThreadContext *p = &fctx->threads[i];
00714
00715 if (p->state != STATE_INPUT_READY) {
00716 pthread_mutex_lock(&p->progress_mutex);
00717 while (p->state != STATE_INPUT_READY)
00718 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
00719 pthread_mutex_unlock(&p->progress_mutex);
00720 }
00721 }
00722 }
00723
00724 static void frame_thread_free(AVCodecContext *avctx, int thread_count)
00725 {
00726 FrameThreadContext *fctx = avctx->thread_opaque;
00727 AVCodec *codec = avctx->codec;
00728 int i;
00729
00730 park_frame_worker_threads(fctx, thread_count);
00731
00732 if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
00733 update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
00734
00735 fctx->die = 1;
00736
00737 for (i = 0; i < thread_count; i++) {
00738 PerThreadContext *p = &fctx->threads[i];
00739
00740 pthread_mutex_lock(&p->mutex);
00741 pthread_cond_signal(&p->input_cond);
00742 pthread_mutex_unlock(&p->mutex);
00743
00744 if (p->thread_init)
00745 pthread_join(p->thread, NULL);
00746
00747 if (codec->close)
00748 codec->close(p->avctx);
00749
00750 avctx->codec = NULL;
00751
00752 release_delayed_buffers(p);
00753 }
00754
00755 for (i = 0; i < thread_count; i++) {
00756 PerThreadContext *p = &fctx->threads[i];
00757
00758 avcodec_default_free_buffers(p->avctx);
00759
00760 pthread_mutex_destroy(&p->mutex);
00761 pthread_mutex_destroy(&p->progress_mutex);
00762 pthread_cond_destroy(&p->input_cond);
00763 pthread_cond_destroy(&p->progress_cond);
00764 pthread_cond_destroy(&p->output_cond);
00765 av_freep(&p->avpkt.data);
00766
00767 if (i) {
00768 av_freep(&p->avctx->priv_data);
00769 av_freep(&p->avctx->internal);
00770 av_freep(&p->avctx->slice_offset);
00771 }
00772
00773 av_freep(&p->avctx);
00774 }
00775
00776 av_freep(&fctx->threads);
00777 pthread_mutex_destroy(&fctx->buffer_mutex);
00778 av_freep(&avctx->thread_opaque);
00779 }
00780
00781 static int frame_thread_init(AVCodecContext *avctx)
00782 {
00783 int thread_count = avctx->thread_count;
00784 AVCodec *codec = avctx->codec;
00785 AVCodecContext *src = avctx;
00786 FrameThreadContext *fctx;
00787 int i, err = 0;
00788
00789 if (!thread_count) {
00790 int nb_cpus = get_logical_cpus(avctx);
00791
00792 if (nb_cpus > 1)
00793 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
00794 else
00795 thread_count = avctx->thread_count = 1;
00796 }
00797
00798 if (thread_count <= 1) {
00799 avctx->active_thread_type = 0;
00800 return 0;
00801 }
00802
00803 avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
00804
00805 fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
00806 pthread_mutex_init(&fctx->buffer_mutex, NULL);
00807 fctx->delaying = 1;
00808
00809 for (i = 0; i < thread_count; i++) {
00810 AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
00811 PerThreadContext *p = &fctx->threads[i];
00812
00813 pthread_mutex_init(&p->mutex, NULL);
00814 pthread_mutex_init(&p->progress_mutex, NULL);
00815 pthread_cond_init(&p->input_cond, NULL);
00816 pthread_cond_init(&p->progress_cond, NULL);
00817 pthread_cond_init(&p->output_cond, NULL);
00818
00819 p->parent = fctx;
00820 p->avctx = copy;
00821
00822 if (!copy) {
00823 err = AVERROR(ENOMEM);
00824 goto error;
00825 }
00826
00827 *copy = *src;
00828 copy->thread_opaque = p;
00829 copy->pkt = &p->avpkt;
00830
00831 if (!i) {
00832 src = copy;
00833
00834 if (codec->init)
00835 err = codec->init(copy);
00836
00837 update_context_from_thread(avctx, copy, 1);
00838 } else {
00839 copy->priv_data = av_malloc(codec->priv_data_size);
00840 if (!copy->priv_data) {
00841 err = AVERROR(ENOMEM);
00842 goto error;
00843 }
00844 memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
00845 copy->internal = av_malloc(sizeof(AVCodecInternal));
00846 if (!copy->internal) {
00847 err = AVERROR(ENOMEM);
00848 goto error;
00849 }
00850 *copy->internal = *src->internal;
00851 copy->internal->is_copy = 1;
00852
00853 if (codec->init_thread_copy)
00854 err = codec->init_thread_copy(copy);
00855 }
00856
00857 if (err) goto error;
00858
00859 if (!pthread_create(&p->thread, NULL, frame_worker_thread, p))
00860 p->thread_init = 1;
00861 }
00862
00863 return 0;
00864
00865 error:
00866 frame_thread_free(avctx, i+1);
00867
00868 return err;
00869 }
00870
00871 void ff_thread_flush(AVCodecContext *avctx)
00872 {
00873 FrameThreadContext *fctx = avctx->thread_opaque;
00874
00875 if (!avctx->thread_opaque) return;
00876
00877 park_frame_worker_threads(fctx, avctx->thread_count);
00878 if (fctx->prev_thread) {
00879 if (fctx->prev_thread != &fctx->threads[0])
00880 update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
00881 if (avctx->codec->flush)
00882 avctx->codec->flush(fctx->threads[0].avctx);
00883 }
00884
00885 fctx->next_decoding = fctx->next_finished = 0;
00886 fctx->delaying = 1;
00887 fctx->prev_thread = NULL;
00888 }
00889
00890 static int *allocate_progress(PerThreadContext *p)
00891 {
00892 int i;
00893
00894 for (i = 0; i < MAX_BUFFERS; i++)
00895 if (!p->progress_used[i]) break;
00896
00897 if (i == MAX_BUFFERS) {
00898 av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n");
00899 return NULL;
00900 }
00901
00902 p->progress_used[i] = 1;
00903
00904 return p->progress[i];
00905 }
00906
00907 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
00908 {
00909 PerThreadContext *p = avctx->thread_opaque;
00910 int *progress, err;
00911
00912 f->owner = avctx;
00913
00914 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
00915 f->thread_opaque = NULL;
00916 return avctx->get_buffer(avctx, f);
00917 }
00918
00919 if (p->state != STATE_SETTING_UP &&
00920 (avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) {
00921 av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
00922 return -1;
00923 }
00924
00925 pthread_mutex_lock(&p->parent->buffer_mutex);
00926 f->thread_opaque = progress = allocate_progress(p);
00927
00928 if (!progress) {
00929 pthread_mutex_unlock(&p->parent->buffer_mutex);
00930 return -1;
00931 }
00932
00933 progress[0] =
00934 progress[1] = -1;
00935
00936 if (avctx->thread_safe_callbacks ||
00937 avctx->get_buffer == avcodec_default_get_buffer) {
00938 err = avctx->get_buffer(avctx, f);
00939 } else {
00940 p->requested_frame = f;
00941 p->state = STATE_GET_BUFFER;
00942 pthread_mutex_lock(&p->progress_mutex);
00943 pthread_cond_signal(&p->progress_cond);
00944
00945 while (p->state != STATE_SETTING_UP)
00946 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
00947
00948 err = p->result;
00949
00950 pthread_mutex_unlock(&p->progress_mutex);
00951
00952 if (!avctx->codec->update_thread_context)
00953 ff_thread_finish_setup(avctx);
00954 }
00955
00956 pthread_mutex_unlock(&p->parent->buffer_mutex);
00957
00958 return err;
00959 }
00960
00961 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
00962 {
00963 PerThreadContext *p = avctx->thread_opaque;
00964 FrameThreadContext *fctx;
00965
00966 if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
00967 avctx->release_buffer(avctx, f);
00968 return;
00969 }
00970
00971 if (p->num_released_buffers >= MAX_BUFFERS) {
00972 av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n");
00973 return;
00974 }
00975
00976 if(avctx->debug & FF_DEBUG_BUFFERS)
00977 av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
00978
00979 fctx = p->parent;
00980 pthread_mutex_lock(&fctx->buffer_mutex);
00981 p->released_buffers[p->num_released_buffers++] = *f;
00982 pthread_mutex_unlock(&fctx->buffer_mutex);
00983 memset(f->data, 0, sizeof(f->data));
00984 }
00985
00995 static void validate_thread_parameters(AVCodecContext *avctx)
00996 {
00997 int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
00998 && !(avctx->flags & CODEC_FLAG_TRUNCATED)
00999 && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
01000 && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
01001 if (avctx->thread_count == 1) {
01002 avctx->active_thread_type = 0;
01003 } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
01004 avctx->active_thread_type = FF_THREAD_FRAME;
01005 } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
01006 avctx->thread_type & FF_THREAD_SLICE) {
01007 avctx->active_thread_type = FF_THREAD_SLICE;
01008 } else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) {
01009 avctx->thread_count = 1;
01010 avctx->active_thread_type = 0;
01011 }
01012 }
01013
01014 int ff_thread_init(AVCodecContext *avctx)
01015 {
01016 if (avctx->thread_opaque) {
01017 av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
01018 return -1;
01019 }
01020
01021 #if HAVE_W32THREADS
01022 w32thread_init();
01023 #endif
01024
01025 if (avctx->codec) {
01026 validate_thread_parameters(avctx);
01027
01028 if (avctx->active_thread_type&FF_THREAD_SLICE)
01029 return thread_init(avctx);
01030 else if (avctx->active_thread_type&FF_THREAD_FRAME)
01031 return frame_thread_init(avctx);
01032 }
01033
01034 return 0;
01035 }
01036
01037 void ff_thread_free(AVCodecContext *avctx)
01038 {
01039 if (avctx->active_thread_type&FF_THREAD_FRAME)
01040 frame_thread_free(avctx, avctx->thread_count);
01041 else
01042 thread_free(avctx);
01043 }