mirror of https://git.ffmpeg.org/ffmpeg.git
296 lines
9.4 KiB
C
296 lines
9.4 KiB
C
/*
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* Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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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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* FFmpeg is distributed in the hope that it will be useful,
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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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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "frame_thread_encoder.h"
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#include "libavutil/fifo.h"
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "thread.h"
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#if HAVE_PTHREADS
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#include <pthread.h>
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#elif HAVE_W32THREADS
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#include "compat/w32pthreads.h"
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#elif HAVE_OS2THREADS
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#include "compat/os2threads.h"
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#endif
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#define MAX_THREADS 64
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#define BUFFER_SIZE (2*MAX_THREADS)
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typedef struct{
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void *indata;
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void *outdata;
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int64_t return_code;
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unsigned index;
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} Task;
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typedef struct{
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AVCodecContext *parent_avctx;
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pthread_mutex_t buffer_mutex;
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AVFifoBuffer *task_fifo;
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pthread_mutex_t task_fifo_mutex;
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pthread_cond_t task_fifo_cond;
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Task finished_tasks[BUFFER_SIZE];
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pthread_mutex_t finished_task_mutex;
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pthread_cond_t finished_task_cond;
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unsigned task_index;
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unsigned finished_task_index;
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pthread_t worker[MAX_THREADS];
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int exit;
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} ThreadContext;
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static void * attribute_align_arg worker(void *v){
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AVCodecContext *avctx = v;
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ThreadContext *c = avctx->internal->frame_thread_encoder;
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AVPacket *pkt = NULL;
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while(!c->exit){
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int got_packet, ret;
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AVFrame *frame;
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Task task;
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if(!pkt) pkt= av_mallocz(sizeof(*pkt));
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if(!pkt) continue;
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av_init_packet(pkt);
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pthread_mutex_lock(&c->task_fifo_mutex);
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while (av_fifo_size(c->task_fifo) <= 0 || c->exit) {
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if(c->exit){
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pthread_mutex_unlock(&c->task_fifo_mutex);
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goto end;
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}
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pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
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}
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av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
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pthread_mutex_unlock(&c->task_fifo_mutex);
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frame = task.indata;
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ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
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pthread_mutex_lock(&c->buffer_mutex);
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av_frame_unref(frame);
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pthread_mutex_unlock(&c->buffer_mutex);
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av_frame_free(&frame);
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if(got_packet) {
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av_dup_packet(pkt);
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} else {
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pkt->data = NULL;
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pkt->size = 0;
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}
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pthread_mutex_lock(&c->finished_task_mutex);
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c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
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c->finished_tasks[task.index].return_code = ret;
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pthread_cond_signal(&c->finished_task_cond);
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pthread_mutex_unlock(&c->finished_task_mutex);
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}
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end:
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av_free(pkt);
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pthread_mutex_lock(&c->buffer_mutex);
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avcodec_close(avctx);
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pthread_mutex_unlock(&c->buffer_mutex);
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av_freep(&avctx);
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return NULL;
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}
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int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
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int i=0;
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ThreadContext *c;
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if( !(avctx->thread_type & FF_THREAD_FRAME)
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|| !(avctx->codec->capabilities & AV_CODEC_CAP_INTRA_ONLY))
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return 0;
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if( !avctx->thread_count
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&& avctx->codec_id == AV_CODEC_ID_MJPEG
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&& !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
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av_log(avctx, AV_LOG_DEBUG,
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"Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
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"or a constant quantizer if you want to use multiple cpu cores\n");
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avctx->thread_count = 1;
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}
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if( avctx->thread_count > 1
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&& avctx->codec_id == AV_CODEC_ID_MJPEG
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&& !(avctx->flags & AV_CODEC_FLAG_QSCALE))
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av_log(avctx, AV_LOG_WARNING,
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"MJPEG CBR encoding works badly with frame multi-threading, consider "
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"using -threads 1, -thread_type slice or a constant quantizer.\n");
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if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
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avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
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int warn = 0;
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if (avctx->flags & AV_CODEC_FLAG_PASS1)
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warn = 1;
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else if(avctx->context_model > 0) {
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AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
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NULL, AV_DICT_MATCH_CASE);
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warn = !t || !t->value || !atoi(t->value) ? 1 : 0;
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}
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// huffyuv does not support these with multiple frame threads currently
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if (warn) {
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av_log(avctx, AV_LOG_WARNING,
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"Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
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avctx->thread_count = 1;
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}
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}
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if(!avctx->thread_count) {
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avctx->thread_count = av_cpu_count();
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avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
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}
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if(avctx->thread_count <= 1)
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return 0;
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if(avctx->thread_count > MAX_THREADS)
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return AVERROR(EINVAL);
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av_assert0(!avctx->internal->frame_thread_encoder);
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c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
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if(!c)
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return AVERROR(ENOMEM);
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c->parent_avctx = avctx;
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c->task_fifo = av_fifo_alloc_array(BUFFER_SIZE, sizeof(Task));
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if(!c->task_fifo)
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goto fail;
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pthread_mutex_init(&c->task_fifo_mutex, NULL);
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pthread_mutex_init(&c->finished_task_mutex, NULL);
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pthread_mutex_init(&c->buffer_mutex, NULL);
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pthread_cond_init(&c->task_fifo_cond, NULL);
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pthread_cond_init(&c->finished_task_cond, NULL);
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for(i=0; i<avctx->thread_count ; i++){
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AVDictionary *tmp = NULL;
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void *tmpv;
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AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
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if(!thread_avctx)
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goto fail;
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tmpv = thread_avctx->priv_data;
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*thread_avctx = *avctx;
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thread_avctx->priv_data = tmpv;
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thread_avctx->internal = NULL;
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memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
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thread_avctx->thread_count = 1;
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thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
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av_dict_copy(&tmp, options, 0);
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av_dict_set(&tmp, "threads", "1", 0);
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if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
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av_dict_free(&tmp);
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goto fail;
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}
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av_dict_free(&tmp);
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av_assert0(!thread_avctx->internal->frame_thread_encoder);
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thread_avctx->internal->frame_thread_encoder = c;
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if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
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goto fail;
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}
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}
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avctx->active_thread_type = FF_THREAD_FRAME;
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return 0;
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fail:
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avctx->thread_count = i;
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av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
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ff_frame_thread_encoder_free(avctx);
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return -1;
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}
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void ff_frame_thread_encoder_free(AVCodecContext *avctx){
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int i;
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ThreadContext *c= avctx->internal->frame_thread_encoder;
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pthread_mutex_lock(&c->task_fifo_mutex);
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c->exit = 1;
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pthread_cond_broadcast(&c->task_fifo_cond);
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pthread_mutex_unlock(&c->task_fifo_mutex);
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for (i=0; i<avctx->thread_count; i++) {
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pthread_join(c->worker[i], NULL);
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}
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pthread_mutex_destroy(&c->task_fifo_mutex);
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pthread_mutex_destroy(&c->finished_task_mutex);
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pthread_mutex_destroy(&c->buffer_mutex);
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pthread_cond_destroy(&c->task_fifo_cond);
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pthread_cond_destroy(&c->finished_task_cond);
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av_fifo_freep(&c->task_fifo);
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av_freep(&avctx->internal->frame_thread_encoder);
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}
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int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
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ThreadContext *c = avctx->internal->frame_thread_encoder;
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Task task;
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int ret;
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av_assert1(!*got_packet_ptr);
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if(frame){
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AVFrame *new = av_frame_alloc();
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if(!new)
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return AVERROR(ENOMEM);
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ret = av_frame_ref(new, frame);
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if(ret < 0) {
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av_frame_free(&new);
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return ret;
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}
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task.index = c->task_index;
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task.indata = (void*)new;
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pthread_mutex_lock(&c->task_fifo_mutex);
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av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
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pthread_cond_signal(&c->task_fifo_cond);
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pthread_mutex_unlock(&c->task_fifo_mutex);
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c->task_index = (c->task_index+1) % BUFFER_SIZE;
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if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
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return 0;
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}
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if(c->task_index == c->finished_task_index)
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return 0;
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pthread_mutex_lock(&c->finished_task_mutex);
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while (!c->finished_tasks[c->finished_task_index].outdata) {
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pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
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}
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task = c->finished_tasks[c->finished_task_index];
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*pkt = *(AVPacket*)(task.outdata);
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if(pkt->data)
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*got_packet_ptr = 1;
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av_freep(&c->finished_tasks[c->finished_task_index].outdata);
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c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
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pthread_mutex_unlock(&c->finished_task_mutex);
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return task.return_code;
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}
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