2 * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "frame_thread_encoder.h"
23 #include "libavutil/fifo.h"
24 #include "libavutil/avassert.h"
25 #include "libavutil/imgutils.h"
33 #include "w32pthreads.h"
35 #include "os2threads.h"
38 #define MAX_THREADS 64
39 #define BUFFER_SIZE (2*MAX_THREADS)
49 AVCodecContext *parent_avctx;
50 pthread_mutex_t buffer_mutex;
52 AVFifoBuffer *task_fifo;
53 pthread_mutex_t task_fifo_mutex;
54 pthread_cond_t task_fifo_cond;
56 Task finished_tasks[BUFFER_SIZE];
57 pthread_mutex_t finished_task_mutex;
58 pthread_cond_t finished_task_cond;
61 unsigned finished_task_index;
63 pthread_t worker[MAX_THREADS];
67 static void * attribute_align_arg worker(void *v){
68 AVCodecContext *avctx = v;
69 ThreadContext *c = avctx->internal->frame_thread_encoder;
77 if(!pkt) pkt= av_mallocz(sizeof(*pkt));
81 pthread_mutex_lock(&c->task_fifo_mutex);
82 while (av_fifo_size(c->task_fifo) <= 0 || c->exit) {
84 pthread_mutex_unlock(&c->task_fifo_mutex);
87 pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
89 av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
90 pthread_mutex_unlock(&c->task_fifo_mutex);
93 ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
94 pthread_mutex_lock(&c->buffer_mutex);
95 c->parent_avctx->release_buffer(c->parent_avctx, frame);
96 pthread_mutex_unlock(&c->buffer_mutex);
101 pkt->data = pkt->size = 0;
103 pthread_mutex_lock(&c->finished_task_mutex);
104 c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
105 c->finished_tasks[task.index].return_code = ret;
106 pthread_cond_signal(&c->finished_task_cond);
107 pthread_mutex_unlock(&c->finished_task_mutex);
111 pthread_mutex_lock(&c->buffer_mutex);
112 avcodec_close(avctx);
113 pthread_mutex_unlock(&c->buffer_mutex);
118 int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
123 if( !(avctx->thread_type & FF_THREAD_FRAME)
124 || !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
127 if(!avctx->thread_count) {
128 avctx->thread_count = ff_get_logical_cpus(avctx);
129 avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
132 if(avctx->thread_count <= 1)
135 if(avctx->thread_count > MAX_THREADS)
136 return AVERROR(EINVAL);
138 av_assert0(!avctx->internal->frame_thread_encoder);
139 c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
141 return AVERROR(ENOMEM);
143 c->parent_avctx = avctx;
145 c->task_fifo = av_fifo_alloc(sizeof(Task) * BUFFER_SIZE);
149 pthread_mutex_init(&c->task_fifo_mutex, NULL);
150 pthread_mutex_init(&c->finished_task_mutex, NULL);
151 pthread_mutex_init(&c->buffer_mutex, NULL);
152 pthread_cond_init(&c->task_fifo_cond, NULL);
153 pthread_cond_init(&c->finished_task_cond, NULL);
155 for(i=0; i<avctx->thread_count ; i++){
156 AVDictionary *tmp = NULL;
158 AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
161 tmpv = thread_avctx->priv_data;
162 *thread_avctx = *avctx;
163 thread_avctx->priv_data = tmpv;
164 thread_avctx->internal = NULL;
165 memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
166 thread_avctx->thread_count = 1;
167 thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
169 av_dict_copy(&tmp, options, 0);
170 av_dict_set(&tmp, "threads", "1", 0);
171 if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
176 av_assert0(!thread_avctx->internal->frame_thread_encoder);
177 thread_avctx->internal->frame_thread_encoder = c;
178 if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
183 avctx->active_thread_type = FF_THREAD_FRAME;
187 avctx->thread_count = i;
188 av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
189 ff_frame_thread_encoder_free(avctx);
193 void ff_frame_thread_encoder_free(AVCodecContext *avctx){
195 ThreadContext *c= avctx->internal->frame_thread_encoder;
197 pthread_mutex_lock(&c->task_fifo_mutex);
199 pthread_cond_broadcast(&c->task_fifo_cond);
200 pthread_mutex_unlock(&c->task_fifo_mutex);
202 for (i=0; i<avctx->thread_count; i++) {
203 pthread_join(c->worker[i], NULL);
206 pthread_mutex_destroy(&c->task_fifo_mutex);
207 pthread_mutex_destroy(&c->finished_task_mutex);
208 pthread_mutex_destroy(&c->buffer_mutex);
209 pthread_cond_destroy(&c->task_fifo_cond);
210 pthread_cond_destroy(&c->finished_task_cond);
211 av_fifo_free(c->task_fifo); c->task_fifo = NULL;
212 av_freep(&avctx->internal->frame_thread_encoder);
215 int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
216 ThreadContext *c = avctx->internal->frame_thread_encoder;
220 av_assert1(!*got_packet_ptr);
223 if(!(avctx->flags & CODEC_FLAG_INPUT_PRESERVED)){
224 AVFrame *new = avcodec_alloc_frame();
226 return AVERROR(ENOMEM);
227 pthread_mutex_lock(&c->buffer_mutex);
228 ret = c->parent_avctx->get_buffer(c->parent_avctx, new);
229 pthread_mutex_unlock(&c->buffer_mutex);
232 new->pts = frame->pts;
233 new->quality = frame->quality;
234 new->pict_type = frame->pict_type;
235 av_image_copy(new->data, new->linesize, (const uint8_t **)frame->data, frame->linesize,
236 avctx->pix_fmt, avctx->width, avctx->height);
240 task.index = c->task_index;
241 task.indata = (void*)frame;
242 pthread_mutex_lock(&c->task_fifo_mutex);
243 av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
244 pthread_cond_signal(&c->task_fifo_cond);
245 pthread_mutex_unlock(&c->task_fifo_mutex);
247 c->task_index = (c->task_index+1) % BUFFER_SIZE;
249 if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
253 if(c->task_index == c->finished_task_index)
256 pthread_mutex_lock(&c->finished_task_mutex);
257 while (!c->finished_tasks[c->finished_task_index].outdata) {
258 pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
260 task = c->finished_tasks[c->finished_task_index];
261 *pkt = *(AVPacket*)(task.outdata);
264 av_freep(&c->finished_tasks[c->finished_task_index].outdata);
265 c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
266 pthread_mutex_unlock(&c->finished_task_mutex);
268 return task.return_code;