/* * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at> * * 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 */ #include "frame_thread_encoder.h" #include "libavutil/fifo.h" #include "libavutil/avassert.h" #include "libavutil/imgutils.h" #include "avcodec.h" #include "internal.h" #include "thread.h" #if HAVE_PTHREADS #include <pthread.h> #elif HAVE_W32THREADS #include "compat/w32pthreads.h" #elif HAVE_OS2THREADS #include "compat/os2threads.h" #endif #define MAX_THREADS 64 #define BUFFER_SIZE (2*MAX_THREADS) typedef struct{ void *indata; void *outdata; int64_t return_code; unsigned index; } Task; typedef struct{ AVCodecContext *parent_avctx; pthread_mutex_t buffer_mutex; AVFifoBuffer *task_fifo; pthread_mutex_t task_fifo_mutex; pthread_cond_t task_fifo_cond; Task finished_tasks[BUFFER_SIZE]; pthread_mutex_t finished_task_mutex; pthread_cond_t finished_task_cond; unsigned task_index; unsigned finished_task_index; pthread_t worker[MAX_THREADS]; int exit; } ThreadContext; static void * attribute_align_arg worker(void *v){ AVCodecContext *avctx = v; ThreadContext *c = avctx->internal->frame_thread_encoder; AVPacket *pkt = NULL; while(!c->exit){ int got_packet, ret; AVFrame *frame; Task task; if(!pkt) pkt= av_mallocz(sizeof(*pkt)); if(!pkt) continue; av_init_packet(pkt); pthread_mutex_lock(&c->task_fifo_mutex); while (av_fifo_size(c->task_fifo) <= 0 || c->exit) { if(c->exit){ pthread_mutex_unlock(&c->task_fifo_mutex); goto end; } pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex); } av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL); pthread_mutex_unlock(&c->task_fifo_mutex); frame = task.indata; ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet); pthread_mutex_lock(&c->buffer_mutex); av_frame_unref(frame); pthread_mutex_unlock(&c->buffer_mutex); av_frame_free(&frame); if(got_packet) { av_dup_packet(pkt); } else { pkt->data = NULL; pkt->size = 0; } pthread_mutex_lock(&c->finished_task_mutex); c->finished_tasks[task.index].outdata = pkt; pkt = NULL; c->finished_tasks[task.index].return_code = ret; pthread_cond_signal(&c->finished_task_cond); pthread_mutex_unlock(&c->finished_task_mutex); } end: av_free(pkt); pthread_mutex_lock(&c->buffer_mutex); avcodec_close(avctx); pthread_mutex_unlock(&c->buffer_mutex); av_freep(&avctx); return NULL; } int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){ int i=0; ThreadContext *c; if( !(avctx->thread_type & FF_THREAD_FRAME) || !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY)) return 0; if( !avctx->thread_count && avctx->codec_id == AV_CODEC_ID_MJPEG && !(avctx->flags & CODEC_FLAG_QSCALE)) { av_log(avctx, AV_LOG_DEBUG, "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice " "or a constant quantizer if you want to use multiple cpu cores\n"); avctx->thread_count = 1; } if( avctx->thread_count > 1 && avctx->codec_id == AV_CODEC_ID_MJPEG && !(avctx->flags & CODEC_FLAG_QSCALE)) av_log(avctx, AV_LOG_WARNING, "MJPEG CBR encoding works badly with frame multi-threading, consider " "using -threads 1, -thread_type slice or a constant quantizer.\n"); if (avctx->codec_id == AV_CODEC_ID_HUFFYUV || avctx->codec_id == AV_CODEC_ID_FFVHUFF) { // huffyuv does not support these with multiple frame threads currently if (avctx->context_model > 0 || (avctx->flags & CODEC_FLAG_PASS1)) { av_log(avctx, AV_LOG_WARNING, "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n"); avctx->thread_count = 1; } } if(!avctx->thread_count) { avctx->thread_count = av_cpu_count(); avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS); } if(avctx->thread_count <= 1) return 0; if(avctx->thread_count > MAX_THREADS) return AVERROR(EINVAL); av_assert0(!avctx->internal->frame_thread_encoder); c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext)); if(!c) return AVERROR(ENOMEM); c->parent_avctx = avctx; c->task_fifo = av_fifo_alloc(sizeof(Task) * BUFFER_SIZE); if(!c->task_fifo) goto fail; pthread_mutex_init(&c->task_fifo_mutex, NULL); pthread_mutex_init(&c->finished_task_mutex, NULL); pthread_mutex_init(&c->buffer_mutex, NULL); pthread_cond_init(&c->task_fifo_cond, NULL); pthread_cond_init(&c->finished_task_cond, NULL); for(i=0; i<avctx->thread_count ; i++){ AVDictionary *tmp = NULL; void *tmpv; AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec); if(!thread_avctx) goto fail; tmpv = thread_avctx->priv_data; *thread_avctx = *avctx; thread_avctx->priv_data = tmpv; thread_avctx->internal = NULL; memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size); thread_avctx->thread_count = 1; thread_avctx->active_thread_type &= ~FF_THREAD_FRAME; av_dict_copy(&tmp, options, 0); av_dict_set(&tmp, "threads", "1", 0); if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) { av_dict_free(&tmp); goto fail; } av_dict_free(&tmp); av_assert0(!thread_avctx->internal->frame_thread_encoder); thread_avctx->internal->frame_thread_encoder = c; if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) { goto fail; } } avctx->active_thread_type = FF_THREAD_FRAME; return 0; fail: avctx->thread_count = i; av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n"); ff_frame_thread_encoder_free(avctx); return -1; } void ff_frame_thread_encoder_free(AVCodecContext *avctx){ int i; ThreadContext *c= avctx->internal->frame_thread_encoder; pthread_mutex_lock(&c->task_fifo_mutex); c->exit = 1; pthread_cond_broadcast(&c->task_fifo_cond); pthread_mutex_unlock(&c->task_fifo_mutex); for (i=0; i<avctx->thread_count; i++) { pthread_join(c->worker[i], NULL); } pthread_mutex_destroy(&c->task_fifo_mutex); pthread_mutex_destroy(&c->finished_task_mutex); pthread_mutex_destroy(&c->buffer_mutex); pthread_cond_destroy(&c->task_fifo_cond); pthread_cond_destroy(&c->finished_task_cond); av_fifo_freep(&c->task_fifo); av_freep(&avctx->internal->frame_thread_encoder); } int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){ ThreadContext *c = avctx->internal->frame_thread_encoder; Task task; int ret; av_assert1(!*got_packet_ptr); if(frame){ if(!(avctx->flags & CODEC_FLAG_INPUT_PRESERVED)){ AVFrame *new = av_frame_alloc(); if(!new) return AVERROR(ENOMEM); pthread_mutex_lock(&c->buffer_mutex); ret = ff_get_buffer(c->parent_avctx, new, 0); pthread_mutex_unlock(&c->buffer_mutex); if(ret<0) return ret; new->pts = frame->pts; new->quality = frame->quality; new->pict_type = frame->pict_type; av_image_copy(new->data, new->linesize, (const uint8_t **)frame->data, frame->linesize, avctx->pix_fmt, avctx->width, avctx->height); frame = new; } task.index = c->task_index; task.indata = (void*)frame; pthread_mutex_lock(&c->task_fifo_mutex); av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL); pthread_cond_signal(&c->task_fifo_cond); pthread_mutex_unlock(&c->task_fifo_mutex); c->task_index = (c->task_index+1) % BUFFER_SIZE; if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count) return 0; } if(c->task_index == c->finished_task_index) return 0; pthread_mutex_lock(&c->finished_task_mutex); while (!c->finished_tasks[c->finished_task_index].outdata) { pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex); } task = c->finished_tasks[c->finished_task_index]; *pkt = *(AVPacket*)(task.outdata); if(pkt->data) *got_packet_ptr = 1; av_freep(&c->finished_tasks[c->finished_task_index].outdata); c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE; pthread_mutex_unlock(&c->finished_task_mutex); return task.return_code; }