From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- media/ffvpx/libavcodec/pthread_slice.c | 314 +++++++++++++++++++++++++++++++++ 1 file changed, 314 insertions(+) create mode 100644 media/ffvpx/libavcodec/pthread_slice.c (limited to 'media/ffvpx/libavcodec/pthread_slice.c') diff --git a/media/ffvpx/libavcodec/pthread_slice.c b/media/ffvpx/libavcodec/pthread_slice.c new file mode 100644 index 000000000..96a7643f6 --- /dev/null +++ b/media/ffvpx/libavcodec/pthread_slice.c @@ -0,0 +1,314 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Slice multithreading support functions + * @see doc/multithreading.txt + */ + +#include "config.h" + +#include "avcodec.h" +#include "internal.h" +#include "pthread_internal.h" +#include "thread.h" + +#include "libavutil/avassert.h" +#include "libavutil/common.h" +#include "libavutil/cpu.h" +#include "libavutil/mem.h" +#include "libavutil/thread.h" + +typedef int (action_func)(AVCodecContext *c, void *arg); +typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr); + +typedef struct SliceThreadContext { + pthread_t *workers; + action_func *func; + action_func2 *func2; + void *args; + int *rets; + int job_count; + int job_size; + + pthread_cond_t last_job_cond; + pthread_cond_t current_job_cond; + pthread_mutex_t current_job_lock; + unsigned current_execute; + int current_job; + int done; + + int *entries; + int entries_count; + int thread_count; + pthread_cond_t *progress_cond; + pthread_mutex_t *progress_mutex; +} SliceThreadContext; + +static void* attribute_align_arg worker(void *v) +{ + AVCodecContext *avctx = v; + SliceThreadContext *c = avctx->internal->thread_ctx; + unsigned last_execute = 0; + int our_job = c->job_count; + int thread_count = avctx->thread_count; + int self_id; + + pthread_mutex_lock(&c->current_job_lock); + self_id = c->current_job++; + for (;;){ + int ret; + while (our_job >= c->job_count) { + if (c->current_job == thread_count + c->job_count) + pthread_cond_signal(&c->last_job_cond); + + while (last_execute == c->current_execute && !c->done) + pthread_cond_wait(&c->current_job_cond, &c->current_job_lock); + last_execute = c->current_execute; + our_job = self_id; + + if (c->done) { + pthread_mutex_unlock(&c->current_job_lock); + return NULL; + } + } + pthread_mutex_unlock(&c->current_job_lock); + + ret = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size): + c->func2(avctx, c->args, our_job, self_id); + if (c->rets) + c->rets[our_job%c->job_count] = ret; + + pthread_mutex_lock(&c->current_job_lock); + our_job = c->current_job++; + } +} + +void ff_slice_thread_free(AVCodecContext *avctx) +{ + SliceThreadContext *c = avctx->internal->thread_ctx; + int i; + + pthread_mutex_lock(&c->current_job_lock); + c->done = 1; + pthread_cond_broadcast(&c->current_job_cond); + for (i = 0; i < c->thread_count; i++) + pthread_cond_broadcast(&c->progress_cond[i]); + pthread_mutex_unlock(&c->current_job_lock); + + for (i=0; ithread_count; i++) + pthread_join(c->workers[i], NULL); + + for (i = 0; i < c->thread_count; i++) { + pthread_mutex_destroy(&c->progress_mutex[i]); + pthread_cond_destroy(&c->progress_cond[i]); + } + + pthread_mutex_destroy(&c->current_job_lock); + pthread_cond_destroy(&c->current_job_cond); + pthread_cond_destroy(&c->last_job_cond); + + av_freep(&c->entries); + av_freep(&c->progress_mutex); + av_freep(&c->progress_cond); + + av_freep(&c->workers); + av_freep(&avctx->internal->thread_ctx); +} + +static av_always_inline void thread_park_workers(SliceThreadContext *c, int thread_count) +{ + while (c->current_job != thread_count + c->job_count) + pthread_cond_wait(&c->last_job_cond, &c->current_job_lock); + pthread_mutex_unlock(&c->current_job_lock); +} + +static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size) +{ + SliceThreadContext *c = avctx->internal->thread_ctx; + + if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1) + return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size); + + if (job_count <= 0) + return 0; + + pthread_mutex_lock(&c->current_job_lock); + + c->current_job = avctx->thread_count; + c->job_count = job_count; + c->job_size = job_size; + c->args = arg; + c->func = func; + if (ret) { + c->rets = ret; + } else { + c->rets = NULL; + } + c->current_execute++; + pthread_cond_broadcast(&c->current_job_cond); + + thread_park_workers(c, avctx->thread_count); + + return 0; +} + +static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count) +{ + SliceThreadContext *c = avctx->internal->thread_ctx; + c->func2 = func2; + return thread_execute(avctx, NULL, arg, ret, job_count, 0); +} + +int ff_slice_thread_init(AVCodecContext *avctx) +{ + int i; + SliceThreadContext *c; + int thread_count = avctx->thread_count; + +#if HAVE_W32THREADS + w32thread_init(); +#endif + + // We cannot do this in the encoder init as the threads are created before + if (av_codec_is_encoder(avctx->codec) && + avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && + avctx->height > 2800) + thread_count = avctx->thread_count = 1; + + if (!thread_count) { + int nb_cpus = av_cpu_count(); + if (avctx->height) + nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16); + // use number of cores + 1 as thread count if there is more than one + if (nb_cpus > 1) + thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS); + else + thread_count = avctx->thread_count = 1; + } + + if (thread_count <= 1) { + avctx->active_thread_type = 0; + return 0; + } + + c = av_mallocz(sizeof(SliceThreadContext)); + if (!c) + return -1; + + c->workers = av_mallocz_array(thread_count, sizeof(pthread_t)); + if (!c->workers) { + av_free(c); + return -1; + } + + avctx->internal->thread_ctx = c; + c->current_job = 0; + c->job_count = 0; + c->job_size = 0; + c->done = 0; + pthread_cond_init(&c->current_job_cond, NULL); + pthread_cond_init(&c->last_job_cond, NULL); + pthread_mutex_init(&c->current_job_lock, NULL); + pthread_mutex_lock(&c->current_job_lock); + for (i=0; iworkers[i], NULL, worker, avctx)) { + avctx->thread_count = i; + pthread_mutex_unlock(&c->current_job_lock); + ff_thread_free(avctx); + return -1; + } + } + + thread_park_workers(c, thread_count); + + avctx->execute = thread_execute; + avctx->execute2 = thread_execute2; + return 0; +} + +void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n) +{ + SliceThreadContext *p = avctx->internal->thread_ctx; + int *entries = p->entries; + + pthread_mutex_lock(&p->progress_mutex[thread]); + entries[field] +=n; + pthread_cond_signal(&p->progress_cond[thread]); + pthread_mutex_unlock(&p->progress_mutex[thread]); +} + +void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift) +{ + SliceThreadContext *p = avctx->internal->thread_ctx; + int *entries = p->entries; + + if (!entries || !field) return; + + thread = thread ? thread - 1 : p->thread_count - 1; + + pthread_mutex_lock(&p->progress_mutex[thread]); + while ((entries[field - 1] - entries[field]) < shift){ + pthread_cond_wait(&p->progress_cond[thread], &p->progress_mutex[thread]); + } + pthread_mutex_unlock(&p->progress_mutex[thread]); +} + +int ff_alloc_entries(AVCodecContext *avctx, int count) +{ + int i; + + if (avctx->active_thread_type & FF_THREAD_SLICE) { + SliceThreadContext *p = avctx->internal->thread_ctx; + + if (p->entries) { + av_assert0(p->thread_count == avctx->thread_count); + av_freep(&p->entries); + } + + p->thread_count = avctx->thread_count; + p->entries = av_mallocz_array(count, sizeof(int)); + + if (!p->progress_mutex) { + p->progress_mutex = av_malloc_array(p->thread_count, sizeof(pthread_mutex_t)); + p->progress_cond = av_malloc_array(p->thread_count, sizeof(pthread_cond_t)); + } + + if (!p->entries || !p->progress_mutex || !p->progress_cond) { + av_freep(&p->entries); + av_freep(&p->progress_mutex); + av_freep(&p->progress_cond); + return AVERROR(ENOMEM); + } + p->entries_count = count; + + for (i = 0; i < p->thread_count; i++) { + pthread_mutex_init(&p->progress_mutex[i], NULL); + pthread_cond_init(&p->progress_cond[i], NULL); + } + } + + return 0; +} + +void ff_reset_entries(AVCodecContext *avctx) +{ + SliceThreadContext *p = avctx->internal->thread_ctx; + memset(p->entries, 0, p->entries_count * sizeof(int)); +} -- cgit v1.2.3