GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/frame_thread_encoder.c Lines: 146 186 78.5 %
Date: 2019-11-18 18:00:01 Branches: 68 110 61.8 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
3
 *
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 * 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
 *
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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
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * 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
19
 */
20
21
#include <stdatomic.h>
22
23
#include "frame_thread_encoder.h"
24
25
#include "libavutil/fifo.h"
26
#include "libavutil/avassert.h"
27
#include "libavutil/imgutils.h"
28
#include "libavutil/opt.h"
29
#include "libavutil/thread.h"
30
#include "avcodec.h"
31
#include "internal.h"
32
#include "thread.h"
33
34
#define MAX_THREADS 64
35
#define BUFFER_SIZE (2*MAX_THREADS)
36
37
typedef struct{
38
    void *indata;
39
    void *outdata;
40
    int64_t return_code;
41
    unsigned index;
42
} Task;
43
44
typedef struct{
45
    AVCodecContext *parent_avctx;
46
    pthread_mutex_t buffer_mutex;
47
48
    AVFifoBuffer *task_fifo;
49
    pthread_mutex_t task_fifo_mutex;
50
    pthread_cond_t task_fifo_cond;
51
52
    Task finished_tasks[BUFFER_SIZE];
53
    pthread_mutex_t finished_task_mutex;
54
    pthread_cond_t finished_task_cond;
55
56
    unsigned task_index;
57
    unsigned finished_task_index;
58
59
    pthread_t worker[MAX_THREADS];
60
    atomic_int exit;
61
} ThreadContext;
62
63
132
static void * attribute_align_arg worker(void *v){
64
132
    AVCodecContext *avctx = v;
65
132
    ThreadContext *c = avctx->internal->frame_thread_encoder;
66
132
    AVPacket *pkt = NULL;
67
68
897
    while (!atomic_load(&c->exit)) {
69
        int got_packet, ret;
70
        AVFrame *frame;
71
        Task task;
72
73
896
        if(!pkt) pkt = av_packet_alloc();
74
896
        if(!pkt) continue;
75
896
        av_init_packet(pkt);
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77
896
        pthread_mutex_lock(&c->task_fifo_mutex);
78

1715
        while (av_fifo_size(c->task_fifo) <= 0 || atomic_load(&c->exit)) {
79
950
            if (atomic_load(&c->exit)) {
80
131
                pthread_mutex_unlock(&c->task_fifo_mutex);
81
131
                goto end;
82
            }
83
819
            pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
84
        }
85
765
        av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
86
765
        pthread_mutex_unlock(&c->task_fifo_mutex);
87
765
        frame = task.indata;
88
89
765
        ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
90
765
        pthread_mutex_lock(&c->buffer_mutex);
91
765
        av_frame_unref(frame);
92
765
        pthread_mutex_unlock(&c->buffer_mutex);
93
765
        av_frame_free(&frame);
94
765
        if(got_packet) {
95
765
            int ret2 = av_packet_make_refcounted(pkt);
96

765
            if (ret >= 0 && ret2 < 0)
97
                ret = ret2;
98
        } else {
99
            pkt->data = NULL;
100
            pkt->size = 0;
101
        }
102
765
        pthread_mutex_lock(&c->finished_task_mutex);
103
765
        c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
104
765
        c->finished_tasks[task.index].return_code = ret;
105
765
        pthread_cond_signal(&c->finished_task_cond);
106
765
        pthread_mutex_unlock(&c->finished_task_mutex);
107
    }
108
1
end:
109
132
    av_free(pkt);
110
132
    pthread_mutex_lock(&c->buffer_mutex);
111
132
    avcodec_close(avctx);
112
132
    pthread_mutex_unlock(&c->buffer_mutex);
113
132
    av_freep(&avctx);
114
132
    return NULL;
115
}
116
117
5882
int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
118
5882
    int i=0;
119
    ThreadContext *c;
120
121
122
5882
    if(   !(avctx->thread_type & FF_THREAD_FRAME)
123
5852
       || !(avctx->codec->capabilities & AV_CODEC_CAP_INTRA_ONLY))
124
5528
        return 0;
125
126
354
    if(   !avctx->thread_count
127
15
       && avctx->codec_id == AV_CODEC_ID_MJPEG
128
       && !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
129
        av_log(avctx, AV_LOG_DEBUG,
130
               "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
131
               "or a constant quantizer if you want to use multiple cpu cores\n");
132
        avctx->thread_count = 1;
133
    }
134
354
    if(   avctx->thread_count > 1
135
3
       && avctx->codec_id == AV_CODEC_ID_MJPEG
136
       && !(avctx->flags & AV_CODEC_FLAG_QSCALE))
137
        av_log(avctx, AV_LOG_WARNING,
138
               "MJPEG CBR encoding works badly with frame multi-threading, consider "
139
               "using -threads 1, -thread_type slice or a constant quantizer.\n");
140
141
354
    if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
142
342
        avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
143
32
        int warn = 0;
144
32
        int context_model = 0;
145
32
        AVDictionaryEntry *con = av_dict_get(options, "context", NULL, AV_DICT_MATCH_CASE);
146
147

32
        if (con && con->value)
148
            context_model = atoi(con->value);
149
150
32
        if (avctx->flags & AV_CODEC_FLAG_PASS1)
151
            warn = 1;
152
32
        else if(context_model > 0) {
153
            AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
154
                                               NULL, AV_DICT_MATCH_CASE);
155
            warn = !t || !t->value || !atoi(t->value) ? 1 : 0;
156
        }
157
        // huffyuv does not support these with multiple frame threads currently
158
32
        if (warn) {
159
            av_log(avctx, AV_LOG_WARNING,
160
               "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
161
            avctx->thread_count = 1;
162
        }
163
    }
164
165
354
    if(!avctx->thread_count) {
166
15
        avctx->thread_count = av_cpu_count();
167
15
        avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
168
    }
169
170
354
    if(avctx->thread_count <= 1)
171
336
        return 0;
172
173
18
    if(avctx->thread_count > MAX_THREADS)
174
        return AVERROR(EINVAL);
175
176
18
    av_assert0(!avctx->internal->frame_thread_encoder);
177
18
    c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
178
18
    if(!c)
179
        return AVERROR(ENOMEM);
180
181
18
    c->parent_avctx = avctx;
182
183
18
    c->task_fifo = av_fifo_alloc_array(BUFFER_SIZE, sizeof(Task));
184
18
    if(!c->task_fifo)
185
        goto fail;
186
187
18
    pthread_mutex_init(&c->task_fifo_mutex, NULL);
188
18
    pthread_mutex_init(&c->finished_task_mutex, NULL);
189
18
    pthread_mutex_init(&c->buffer_mutex, NULL);
190
18
    pthread_cond_init(&c->task_fifo_cond, NULL);
191
18
    pthread_cond_init(&c->finished_task_cond, NULL);
192
18
    atomic_init(&c->exit, 0);
193
194
150
    for(i=0; i<avctx->thread_count ; i++){
195
132
        AVDictionary *tmp = NULL;
196
        int ret;
197
        void *tmpv;
198
132
        AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
199
132
        if(!thread_avctx)
200
            goto fail;
201
132
        tmpv = thread_avctx->priv_data;
202
132
        *thread_avctx = *avctx;
203
132
        ret = av_opt_copy(thread_avctx, avctx);
204
132
        if (ret < 0)
205
            goto fail;
206
132
        thread_avctx->priv_data = tmpv;
207
132
        thread_avctx->internal = NULL;
208
132
        if (avctx->codec->priv_class) {
209
132
            int ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
210
132
            if (ret < 0)
211
                goto fail;
212
        } else if (avctx->codec->priv_data_size) {
213
            memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
214
        }
215
132
        thread_avctx->thread_count = 1;
216
132
        thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
217
218
132
        av_dict_copy(&tmp, options, 0);
219
132
        av_dict_set(&tmp, "threads", "1", 0);
220
132
        if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
221
            av_dict_free(&tmp);
222
            goto fail;
223
        }
224
132
        av_dict_free(&tmp);
225
132
        av_assert0(!thread_avctx->internal->frame_thread_encoder);
226
132
        thread_avctx->internal->frame_thread_encoder = c;
227
132
        if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
228
            goto fail;
229
        }
230
    }
231
232
18
    avctx->active_thread_type = FF_THREAD_FRAME;
233
234
18
    return 0;
235
fail:
236
    avctx->thread_count = i;
237
    av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
238
    ff_frame_thread_encoder_free(avctx);
239
    return -1;
240
}
241
242
18
void ff_frame_thread_encoder_free(AVCodecContext *avctx){
243
    int i;
244
18
    ThreadContext *c= avctx->internal->frame_thread_encoder;
245
246
18
    pthread_mutex_lock(&c->task_fifo_mutex);
247
18
    atomic_store(&c->exit, 1);
248
18
    pthread_cond_broadcast(&c->task_fifo_cond);
249
18
    pthread_mutex_unlock(&c->task_fifo_mutex);
250
251
150
    for (i=0; i<avctx->thread_count; i++) {
252
132
         pthread_join(c->worker[i], NULL);
253
    }
254
255
18
    while (av_fifo_size(c->task_fifo) > 0) {
256
        Task task;
257
        AVFrame *frame;
258
        av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
259
        frame = task.indata;
260
        av_frame_free(&frame);
261
        task.indata = NULL;
262
    }
263
264
2322
    for (i=0; i<BUFFER_SIZE; i++) {
265
2304
        if (c->finished_tasks[i].outdata != NULL) {
266
            AVPacket *pkt = c->finished_tasks[i].outdata;
267
            av_packet_free(&pkt);
268
            c->finished_tasks[i].outdata = NULL;
269
        }
270
    }
271
272
18
    pthread_mutex_destroy(&c->task_fifo_mutex);
273
18
    pthread_mutex_destroy(&c->finished_task_mutex);
274
18
    pthread_mutex_destroy(&c->buffer_mutex);
275
18
    pthread_cond_destroy(&c->task_fifo_cond);
276
18
    pthread_cond_destroy(&c->finished_task_cond);
277
18
    av_fifo_freep(&c->task_fifo);
278
18
    av_freep(&avctx->internal->frame_thread_encoder);
279
18
}
280
281
870
int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
282
870
    ThreadContext *c = avctx->internal->frame_thread_encoder;
283
    Task task;
284
    int ret;
285
286
    av_assert1(!*got_packet_ptr);
287
288
870
    if(frame){
289
765
        AVFrame *new = av_frame_alloc();
290
765
        if(!new)
291
            return AVERROR(ENOMEM);
292
765
        ret = av_frame_ref(new, frame);
293
765
        if(ret < 0) {
294
            av_frame_free(&new);
295
            return ret;
296
        }
297
298
765
        task.index = c->task_index;
299
765
        task.indata = (void*)new;
300
765
        pthread_mutex_lock(&c->task_fifo_mutex);
301
765
        av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
302
765
        pthread_cond_signal(&c->task_fifo_cond);
303
765
        pthread_mutex_unlock(&c->task_fifo_mutex);
304
305
765
        c->task_index = (c->task_index+1) % BUFFER_SIZE;
306
    }
307
308
870
    pthread_mutex_lock(&c->finished_task_mutex);
309

870
    if (c->task_index == c->finished_task_index ||
310
765
        (frame && !c->finished_tasks[c->finished_task_index].outdata &&
311
131
         (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)) {
312
105
            pthread_mutex_unlock(&c->finished_task_mutex);
313
105
            return 0;
314
        }
315
316
923
    while (!c->finished_tasks[c->finished_task_index].outdata) {
317
158
        pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
318
    }
319
765
    task = c->finished_tasks[c->finished_task_index];
320
765
    *pkt = *(AVPacket*)(task.outdata);
321
765
    if(pkt->data)
322
765
        *got_packet_ptr = 1;
323
765
    av_freep(&c->finished_tasks[c->finished_task_index].outdata);
324
765
    c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
325
765
    pthread_mutex_unlock(&c->finished_task_mutex);
326
327
765
    return task.return_code;
328
}