frame_thread_encode: fix context memleak
[ffmpeg.git] / libavcodec / frame_thread_encoder.c
1 /*
2  * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
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.
10  *
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.
15  *
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
19  */
20
21 #include "frame_thread_encoder.h"
22
23 #include "libavutil/fifo.h"
24 #include "libavutil/avassert.h"
25 #include "libavutil/imgutils.h"
26 #include "avcodec.h"
27 #include "internal.h"
28 #include "thread.h"
29
30 #if HAVE_PTHREADS
31 #include <pthread.h>
32 #elif HAVE_W32THREADS
33 #include "w32pthreads.h"
34 #elif HAVE_OS2THREADS
35 #include "os2threads.h"
36 #endif
37
38 #define MAX_THREADS 64
39 #define BUFFER_SIZE (2*MAX_THREADS)
40
41 typedef struct{
42     void *indata;
43     void *outdata;
44     int64_t return_code;
45     unsigned index;
46 } Task;
47
48 typedef struct{
49     AVCodecContext *parent_avctx;
50     pthread_mutex_t buffer_mutex;
51
52     AVFifoBuffer *task_fifo;
53     pthread_mutex_t task_fifo_mutex;
54     pthread_cond_t task_fifo_cond;
55
56     Task finished_tasks[BUFFER_SIZE];
57     pthread_mutex_t finished_task_mutex;
58     pthread_cond_t finished_task_cond;
59
60     unsigned task_index;
61     unsigned finished_task_index;
62
63     pthread_t worker[MAX_THREADS];
64     int exit;
65 } ThreadContext;
66
67 static void * attribute_align_arg worker(void *v){
68     AVCodecContext *avctx = v;
69     ThreadContext *c = avctx->internal->frame_thread_encoder;
70     AVPacket *pkt = NULL;
71
72     while(!c->exit){
73         int got_packet, ret;
74         AVFrame *frame;
75         Task task;
76
77         if(!pkt) pkt= av_mallocz(sizeof(*pkt));
78         if(!pkt) continue;
79         av_init_packet(pkt);
80
81         pthread_mutex_lock(&c->task_fifo_mutex);
82         while (av_fifo_size(c->task_fifo) <= 0 || c->exit) {
83             if(c->exit){
84                 pthread_mutex_unlock(&c->task_fifo_mutex);
85                 goto end;
86             }
87             pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
88         }
89         av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
90         pthread_mutex_unlock(&c->task_fifo_mutex);
91         frame = task.indata;
92
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);
97         av_freep(&frame);
98         if(!got_packet)
99             continue;
100         av_dup_packet(pkt);
101         pthread_mutex_lock(&c->finished_task_mutex);
102         c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
103         c->finished_tasks[task.index].return_code = ret;
104         pthread_cond_signal(&c->finished_task_cond);
105         pthread_mutex_unlock(&c->finished_task_mutex);
106     }
107 end:
108     av_free(pkt);
109     pthread_mutex_lock(&c->buffer_mutex);
110     avcodec_close(avctx);
111     pthread_mutex_unlock(&c->buffer_mutex);
112     av_freep(&avctx);
113     return NULL;
114 }
115
116 int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
117     int i=0;
118     ThreadContext *c;
119
120
121     if(   !(avctx->thread_type & FF_THREAD_FRAME)
122        || !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
123         return 0;
124
125     if(!avctx->thread_count) {
126         avctx->thread_count = ff_get_logical_cpus(avctx);
127         avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
128     }
129
130     if(avctx->thread_count <= 1)
131         return 0;
132
133     if(avctx->thread_count > MAX_THREADS)
134         return AVERROR(EINVAL);
135
136     av_assert0(!avctx->internal->frame_thread_encoder);
137     c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
138     if(!c)
139         return AVERROR(ENOMEM);
140
141     c->parent_avctx = avctx;
142
143     c->task_fifo = av_fifo_alloc(sizeof(Task) * BUFFER_SIZE);
144     if(!c->task_fifo)
145         goto fail;
146
147     pthread_mutex_init(&c->task_fifo_mutex, NULL);
148     pthread_mutex_init(&c->finished_task_mutex, NULL);
149     pthread_mutex_init(&c->buffer_mutex, NULL);
150     pthread_cond_init(&c->task_fifo_cond, NULL);
151     pthread_cond_init(&c->finished_task_cond, NULL);
152
153     for(i=0; i<avctx->thread_count ; i++){
154         AVDictionary *tmp = NULL;
155         void *tmpv;
156         AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
157         if(!thread_avctx)
158             goto fail;
159         tmpv = thread_avctx->priv_data;
160         *thread_avctx = *avctx;
161         thread_avctx->priv_data = tmpv;
162         thread_avctx->internal = NULL;
163         memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
164         thread_avctx->thread_count = 1;
165         thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
166
167         av_dict_copy(&tmp, options, 0);
168         av_dict_set(&tmp, "threads", "1", 0);
169         if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
170             av_dict_free(&tmp);
171             goto fail;
172         }
173         av_dict_free(&tmp);
174         av_assert0(!thread_avctx->internal->frame_thread_encoder);
175         thread_avctx->internal->frame_thread_encoder = c;
176         if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
177             goto fail;
178         }
179     }
180
181     avctx->active_thread_type = FF_THREAD_FRAME;
182
183     return 0;
184 fail:
185     avctx->thread_count = i;
186     av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
187     ff_frame_thread_encoder_free(avctx);
188     return -1;
189 }
190
191 void ff_frame_thread_encoder_free(AVCodecContext *avctx){
192     int i;
193     ThreadContext *c= avctx->internal->frame_thread_encoder;
194
195     pthread_mutex_lock(&c->task_fifo_mutex);
196     c->exit = 1;
197     pthread_cond_broadcast(&c->task_fifo_cond);
198     pthread_mutex_unlock(&c->task_fifo_mutex);
199
200     for (i=0; i<avctx->thread_count; i++) {
201          pthread_join(c->worker[i], NULL);
202     }
203
204     pthread_mutex_destroy(&c->task_fifo_mutex);
205     pthread_mutex_destroy(&c->finished_task_mutex);
206     pthread_mutex_destroy(&c->buffer_mutex);
207     pthread_cond_destroy(&c->task_fifo_cond);
208     pthread_cond_destroy(&c->finished_task_cond);
209     av_fifo_free(c->task_fifo); c->task_fifo = NULL;
210     av_freep(&avctx->internal->frame_thread_encoder);
211 }
212
213 int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
214     ThreadContext *c = avctx->internal->frame_thread_encoder;
215     Task task;
216     int ret;
217
218     av_assert1(!*got_packet_ptr);
219
220     if(frame){
221         if(!(avctx->flags & CODEC_FLAG_INPUT_PRESERVED)){
222             AVFrame *new = avcodec_alloc_frame();
223             if(!new)
224                 return AVERROR(ENOMEM);
225             pthread_mutex_lock(&c->buffer_mutex);
226             ret = c->parent_avctx->get_buffer(c->parent_avctx, new);
227             pthread_mutex_unlock(&c->buffer_mutex);
228             if(ret<0)
229                 return ret;
230             new->pts = frame->pts;
231             new->quality = frame->quality;
232             new->pict_type = frame->pict_type;
233             av_image_copy(new->data, new->linesize, (const uint8_t **)frame->data, frame->linesize,
234                           avctx->pix_fmt, avctx->width, avctx->height);
235             frame = new;
236         }
237
238         task.index = c->task_index;
239         task.indata = (void*)frame;
240         pthread_mutex_lock(&c->task_fifo_mutex);
241         av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
242         pthread_cond_signal(&c->task_fifo_cond);
243         pthread_mutex_unlock(&c->task_fifo_mutex);
244
245         c->task_index = (c->task_index+1) % BUFFER_SIZE;
246
247         if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
248             return 0;
249     }
250
251     if(c->task_index == c->finished_task_index)
252         return 0;
253
254     pthread_mutex_lock(&c->finished_task_mutex);
255     while (!c->finished_tasks[c->finished_task_index].outdata) {
256         pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
257     }
258     task = c->finished_tasks[c->finished_task_index];
259     *pkt = *(AVPacket*)(task.outdata);
260     av_freep(&c->finished_tasks[c->finished_task_index].outdata);
261     c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
262     pthread_mutex_unlock(&c->finished_task_mutex);
263
264     *got_packet_ptr = 1;
265
266     return task.return_code;
267 }