2013-10-27 11:22:52 +00:00
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/*
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2013-11-04 09:44:34 +00:00
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* This file is part of FFmpeg.
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2013-10-27 11:22:52 +00:00
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*
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2013-11-04 09:44:34 +00:00
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* FFmpeg is free software; you can redistribute it and/or
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2013-10-27 11:22:52 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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2013-11-04 09:44:34 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2013-10-27 11:22:52 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2013-11-04 09:44:34 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2013-10-27 11:22:52 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Slice multithreading support functions
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* @see doc/multithreading.txt
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*/
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#include "config.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "pthread_internal.h"
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#include "thread.h"
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2015-11-27 22:32:04 +00:00
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#include "libavutil/avassert.h"
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2013-10-27 11:22:52 +00:00
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#include "libavutil/common.h"
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#include "libavutil/cpu.h"
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#include "libavutil/mem.h"
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2016-01-20 20:36:10 +00:00
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#include "libavutil/thread.h"
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2017-07-11 23:58:07 +00:00
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#include "libavutil/slicethread.h"
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2013-10-27 11:22:52 +00:00
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typedef int (action_func)(AVCodecContext *c, void *arg);
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typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
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2017-09-07 20:48:17 +00:00
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typedef int (main_func)(AVCodecContext *c);
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2013-10-27 11:22:52 +00:00
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2013-10-27 11:31:38 +00:00
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typedef struct SliceThreadContext {
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AVSliceThread *thread;
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2013-10-27 11:22:52 +00:00
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action_func *func;
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action_func2 *func2;
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2017-09-07 20:48:17 +00:00
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main_func *mainfunc;
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2013-10-27 11:22:52 +00:00
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void *args;
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int *rets;
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int job_size;
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2013-11-04 09:44:34 +00:00
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int *entries;
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int entries_count;
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int thread_count;
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pthread_cond_t *progress_cond;
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pthread_mutex_t *progress_mutex;
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2013-10-27 11:31:38 +00:00
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} SliceThreadContext;
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2013-10-27 11:22:52 +00:00
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2017-09-07 20:48:17 +00:00
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static void main_function(void *priv) {
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AVCodecContext *avctx = priv;
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SliceThreadContext *c = avctx->internal->thread_ctx;
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c->mainfunc(avctx);
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}
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2017-07-11 23:58:07 +00:00
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static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
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2013-10-27 11:22:52 +00:00
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{
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2017-07-11 23:58:07 +00:00
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AVCodecContext *avctx = priv;
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2013-10-27 12:00:37 +00:00
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SliceThreadContext *c = avctx->internal->thread_ctx;
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2017-07-11 23:58:07 +00:00
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int ret;
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ret = c->func ? c->func(avctx, (char *)c->args + c->job_size * jobnr)
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: c->func2(avctx, c->args, jobnr, threadnr);
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if (c->rets)
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c->rets[jobnr] = ret;
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2013-10-27 11:22:52 +00:00
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}
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void ff_slice_thread_free(AVCodecContext *avctx)
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{
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2013-10-27 12:00:37 +00:00
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SliceThreadContext *c = avctx->internal->thread_ctx;
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2013-10-27 11:22:52 +00:00
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int i;
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2017-07-11 23:58:07 +00:00
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avpriv_slicethread_free(&c->thread);
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2013-10-27 11:22:52 +00:00
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2015-02-05 15:00:11 +00:00
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for (i = 0; i < c->thread_count; i++) {
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pthread_mutex_destroy(&c->progress_mutex[i]);
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pthread_cond_destroy(&c->progress_cond[i]);
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}
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av_freep(&c->entries);
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av_freep(&c->progress_mutex);
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av_freep(&c->progress_cond);
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2013-10-27 12:00:37 +00:00
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av_freep(&avctx->internal->thread_ctx);
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2013-10-27 11:22:52 +00:00
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}
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static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
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{
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2013-10-27 12:00:37 +00:00
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SliceThreadContext *c = avctx->internal->thread_ctx;
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2013-10-27 11:22:52 +00:00
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if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
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return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
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if (job_count <= 0)
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return 0;
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c->job_size = job_size;
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c->args = arg;
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c->func = func;
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2017-03-29 10:20:32 +00:00
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c->rets = ret;
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2013-10-27 11:22:52 +00:00
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2017-09-07 20:48:17 +00:00
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avpriv_slicethread_execute(c->thread, job_count, !!c->mainfunc );
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2013-10-27 11:22:52 +00:00
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return 0;
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}
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static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
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{
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2013-10-27 12:00:37 +00:00
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SliceThreadContext *c = avctx->internal->thread_ctx;
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2013-10-27 11:22:52 +00:00
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c->func2 = func2;
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return thread_execute(avctx, NULL, arg, ret, job_count, 0);
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}
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2017-09-07 20:48:17 +00:00
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int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx, action_func2* func2, main_func *mainfunc, void *arg, int *ret, int job_count)
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{
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SliceThreadContext *c = avctx->internal->thread_ctx;
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c->func2 = func2;
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c->mainfunc = mainfunc;
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return thread_execute(avctx, NULL, arg, ret, job_count, 0);
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}
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2013-10-27 11:22:52 +00:00
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int ff_slice_thread_init(AVCodecContext *avctx)
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{
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2013-10-27 11:31:38 +00:00
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SliceThreadContext *c;
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2013-10-27 11:22:52 +00:00
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int thread_count = avctx->thread_count;
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2017-09-07 20:48:17 +00:00
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static void (*mainfunc)(void *);
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2013-10-27 11:22:52 +00:00
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2016-01-20 23:36:51 +00:00
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// We cannot do this in the encoder init as the threads are created before
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if (av_codec_is_encoder(avctx->codec) &&
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avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO &&
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avctx->height > 2800)
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thread_count = avctx->thread_count = 1;
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2013-10-27 11:22:52 +00:00
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if (!thread_count) {
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int nb_cpus = av_cpu_count();
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2013-11-04 09:44:34 +00:00
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if (avctx->height)
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nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
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2013-10-27 11:22:52 +00:00
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// use number of cores + 1 as thread count if there is more than one
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if (nb_cpus > 1)
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thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
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else
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thread_count = avctx->thread_count = 1;
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}
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if (thread_count <= 1) {
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avctx->active_thread_type = 0;
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return 0;
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}
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2017-07-11 23:58:07 +00:00
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avctx->internal->thread_ctx = c = av_mallocz(sizeof(*c));
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2017-09-07 20:48:17 +00:00
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mainfunc = avctx->codec->caps_internal & FF_CODEC_CAP_SLICE_THREAD_HAS_MF ? &main_function : NULL;
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if (!c || (thread_count = avpriv_slicethread_create(&c->thread, avctx, worker_func, mainfunc, thread_count)) <= 1) {
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2017-07-11 23:58:07 +00:00
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if (c)
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avpriv_slicethread_free(&c->thread);
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av_freep(&avctx->internal->thread_ctx);
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avctx->thread_count = 1;
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avctx->active_thread_type = 0;
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return 0;
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2013-10-27 11:22:52 +00:00
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}
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2017-07-11 23:58:07 +00:00
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avctx->thread_count = thread_count;
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2013-10-27 11:22:52 +00:00
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avctx->execute = thread_execute;
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avctx->execute2 = thread_execute2;
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return 0;
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}
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2013-11-04 09:44:34 +00:00
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void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
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{
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2013-11-04 10:14:38 +00:00
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SliceThreadContext *p = avctx->internal->thread_ctx;
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2013-11-04 09:44:34 +00:00
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int *entries = p->entries;
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pthread_mutex_lock(&p->progress_mutex[thread]);
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entries[field] +=n;
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pthread_cond_signal(&p->progress_cond[thread]);
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pthread_mutex_unlock(&p->progress_mutex[thread]);
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}
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void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
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{
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2013-11-04 10:14:38 +00:00
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SliceThreadContext *p = avctx->internal->thread_ctx;
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2013-11-04 09:44:34 +00:00
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int *entries = p->entries;
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if (!entries || !field) return;
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thread = thread ? thread - 1 : p->thread_count - 1;
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pthread_mutex_lock(&p->progress_mutex[thread]);
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while ((entries[field - 1] - entries[field]) < shift){
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pthread_cond_wait(&p->progress_cond[thread], &p->progress_mutex[thread]);
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}
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pthread_mutex_unlock(&p->progress_mutex[thread]);
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}
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int ff_alloc_entries(AVCodecContext *avctx, int count)
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{
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int i;
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if (avctx->active_thread_type & FF_THREAD_SLICE) {
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2013-11-04 10:14:38 +00:00
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SliceThreadContext *p = avctx->internal->thread_ctx;
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2015-11-27 22:32:04 +00:00
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if (p->entries) {
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av_assert0(p->thread_count == avctx->thread_count);
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av_freep(&p->entries);
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}
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2013-11-04 09:44:34 +00:00
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p->thread_count = avctx->thread_count;
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2014-06-08 14:34:50 +00:00
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p->entries = av_mallocz_array(count, sizeof(int));
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2013-11-04 09:44:34 +00:00
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2015-11-27 22:32:04 +00:00
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if (!p->progress_mutex) {
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p->progress_mutex = av_malloc_array(p->thread_count, sizeof(pthread_mutex_t));
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p->progress_cond = av_malloc_array(p->thread_count, sizeof(pthread_cond_t));
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}
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2014-07-31 10:55:41 +00:00
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if (!p->entries || !p->progress_mutex || !p->progress_cond) {
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av_freep(&p->entries);
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av_freep(&p->progress_mutex);
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av_freep(&p->progress_cond);
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2013-11-04 09:44:34 +00:00
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return AVERROR(ENOMEM);
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}
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p->entries_count = count;
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for (i = 0; i < p->thread_count; i++) {
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pthread_mutex_init(&p->progress_mutex[i], NULL);
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pthread_cond_init(&p->progress_cond[i], NULL);
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}
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}
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return 0;
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}
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void ff_reset_entries(AVCodecContext *avctx)
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{
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2013-11-04 10:14:38 +00:00
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SliceThreadContext *p = avctx->internal->thread_ctx;
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2013-11-04 09:44:34 +00:00
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memset(p->entries, 0, p->entries_count * sizeof(int));
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}
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