FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/frame_thread_encoder.c	Lines:	140	170	82.4 %
Date:	2021-04-20 15:25:36	Branches:	65	102	63.7 %


/*
 * 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 <stdatomic.h>

#include "frame_thread_encoder.h"

#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "internal.h"
#include "thread.h"

#define MAX_THREADS 64
/* There can be as many as MAX_THREADS + 1 outstanding tasks.
 * An additional + 1 is needed so that one can distinguish
 * the case of zero and MAX_THREADS + 1 outstanding tasks modulo
 * the number of buffers. */
#define BUFFER_SIZE (MAX_THREADS + 2)

typedef struct{
    AVFrame  *indata;
    AVPacket *outdata;
    int       return_code;
    int       finished;
} Task;

typedef struct{
    AVCodecContext *parent_avctx;
    pthread_mutex_t buffer_mutex;

    pthread_mutex_t task_fifo_mutex; /* Used to guard (next_)task_index */
    pthread_cond_t task_fifo_cond;

    unsigned max_tasks;
    Task tasks[BUFFER_SIZE];
    pthread_mutex_t finished_task_mutex; /* Guards tasks[i].finished */
    pthread_cond_t finished_task_cond;

    unsigned next_task_index;
    unsigned task_index;
    unsigned finished_task_index;

    pthread_t worker[MAX_THREADS];
    atomic_int exit;
} ThreadContext;

static void * attribute_align_arg worker(void *v){
    AVCodecContext *avctx = v;
    ThreadContext *c = avctx->internal->frame_thread_encoder;

    while (!atomic_load(&c->exit)) {
        int got_packet = 0, ret;
        AVPacket *pkt;
        AVFrame *frame;
        Task *task;
        unsigned task_index;

        pthread_mutex_lock(&c->task_fifo_mutex);
        while (c->next_task_index == c->task_index || atomic_load(&c->exit)) {
            if (atomic_load(&c->exit)) {
                pthread_mutex_unlock(&c->task_fifo_mutex);
                goto end;
            }
            pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
        }
        task_index         = c->next_task_index;
        c->next_task_index = (c->next_task_index + 1) % c->max_tasks;
        pthread_mutex_unlock(&c->task_fifo_mutex);
        /* The main thread ensures that any two outstanding tasks have
         * different indices, ergo each worker thread owns its element
         * of c->tasks with the exception of finished, which is shared
         * with the main thread and guarded by finished_task_mutex. */
        task  = &c->tasks[task_index];
        frame = task->indata;
        pkt   = task->outdata;

        ret = avctx->codec->encode2(avctx, pkt, frame, &got_packet);
        if(got_packet) {
            int ret2 = av_packet_make_refcounted(pkt);
            if (ret >= 0 && ret2 < 0)
                ret = ret2;
            pkt->pts = pkt->dts = frame->pts;
        } else {
            pkt->data = NULL;
            pkt->size = 0;
        }
        pthread_mutex_lock(&c->buffer_mutex);
        av_frame_unref(frame);
        pthread_mutex_unlock(&c->buffer_mutex);
        pthread_mutex_lock(&c->finished_task_mutex);
        task->return_code = ret;
        task->finished    = 1;
        pthread_cond_signal(&c->finished_task_cond);
        pthread_mutex_unlock(&c->finished_task_mutex);
    }
end:
    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 & AV_CODEC_CAP_FRAME_THREADS))
        return 0;

    if(   !avctx->thread_count
       && avctx->codec_id == AV_CODEC_ID_MJPEG
       && !(avctx->flags & AV_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 & AV_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) {
        int warn = 0;
        int context_model = 0;
        AVDictionaryEntry *con = av_dict_get(options, "context", NULL, AV_DICT_MATCH_CASE);

        if (con && con->value)
            context_model = atoi(con->value);

        if (avctx->flags & AV_CODEC_FLAG_PASS1)
            warn = 1;
        else if(context_model > 0) {
            AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
                                               NULL, AV_DICT_MATCH_CASE);
            warn = !t || !t->value || !atoi(t->value) ? 1 : 0;
        }
        // huffyuv does not support these with multiple frame threads currently
        if (warn) {
            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;

    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);
    atomic_init(&c->exit, 0);

    c->max_tasks = avctx->thread_count + 2;
    for (unsigned i = 0; i < c->max_tasks; i++) {
        if (!(c->tasks[i].indata  = av_frame_alloc()) ||
            !(c->tasks[i].outdata = av_packet_alloc()))
            goto fail;
    }

    for(i=0; i<avctx->thread_count ; i++){
        AVDictionary *tmp = NULL;
        int ret;
        void *tmpv;
        AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
        if(!thread_avctx)
            goto fail;
        tmpv = thread_avctx->priv_data;
        *thread_avctx = *avctx;
        ret = av_opt_copy(thread_avctx, avctx);
        if (ret < 0)
            goto fail;
        thread_avctx->priv_data = tmpv;
        thread_avctx->internal = NULL;
        if (avctx->codec->priv_class) {
            int ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
            if (ret < 0)
                goto fail;
        } else if (avctx->codec->priv_data_size) {
            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);
    atomic_store(&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);
    }

    for (unsigned i = 0; i < c->max_tasks; i++) {
        av_frame_free(&c->tasks[i].indata);
        av_packet_free(&c->tasks[i].outdata);
    }

    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_freep(&avctx->internal->frame_thread_encoder);
}

int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                 AVFrame *frame, int *got_packet_ptr)
{
    ThreadContext *c = avctx->internal->frame_thread_encoder;
    Task *outtask;

    av_assert1(!*got_packet_ptr);

    if(frame){
        av_frame_move_ref(c->tasks[c->task_index].indata, frame);

        pthread_mutex_lock(&c->task_fifo_mutex);
        c->task_index = (c->task_index + 1) % c->max_tasks;
        pthread_cond_signal(&c->task_fifo_cond);
        pthread_mutex_unlock(&c->task_fifo_mutex);
    }

    outtask = &c->tasks[c->finished_task_index];
    pthread_mutex_lock(&c->finished_task_mutex);
    /* The access to task_index in the following code is ok,
     * because it is only ever changed by the main thread. */
    if (c->task_index == c->finished_task_index ||
        (frame && !outtask->finished &&
         (c->task_index - c->finished_task_index + c->max_tasks) % c->max_tasks <= avctx->thread_count)) {
            pthread_mutex_unlock(&c->finished_task_mutex);
            return 0;
        }
    while (!outtask->finished) {
        pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
    }
    pthread_mutex_unlock(&c->finished_task_mutex);
    /* We now own outtask completely: No worker thread touches it any more,
     * because there is no outstanding task with this index. */
    outtask->finished = 0;
    av_packet_move_ref(pkt, outtask->outdata);
    if(pkt->data)
        *got_packet_ptr = 1;
    c->finished_task_index = (c->finished_task_index + 1) % c->max_tasks;

    return outtask->return_code;
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
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 <stdatomic.h>
22
23			#include "frame_thread_encoder.h"
24
25			#include "libavutil/avassert.h"
26			#include "libavutil/imgutils.h"
27			#include "libavutil/opt.h"
28			#include "libavutil/thread.h"
29			#include "avcodec.h"
30			#include "internal.h"
31			#include "thread.h"
32
33			#define MAX_THREADS 64
34			/* There can be as many as MAX_THREADS + 1 outstanding tasks.
35			* An additional + 1 is needed so that one can distinguish
36			* the case of zero and MAX_THREADS + 1 outstanding tasks modulo
37			* the number of buffers. */
38			#define BUFFER_SIZE (MAX_THREADS + 2)
39
40			typedef struct{
41			AVFrame *indata;
42			AVPacket *outdata;
43			int return_code;
44			int finished;
45			} Task;
46
47			typedef struct{
48			AVCodecContext *parent_avctx;
49			pthread_mutex_t buffer_mutex;
50
51			pthread_mutex_t task_fifo_mutex; /* Used to guard (next_)task_index */
52			pthread_cond_t task_fifo_cond;
53
54			unsigned max_tasks;
55			Task tasks[BUFFER_SIZE];
56			pthread_mutex_t finished_task_mutex; /* Guards tasks[i].finished */
57			pthread_cond_t finished_task_cond;
58
59			unsigned next_task_index;
60			unsigned task_index;
61			unsigned finished_task_index;
62
63			pthread_t worker[MAX_THREADS];
64			atomic_int exit;
65			} ThreadContext;
66
67		132	static void * attribute_align_arg worker(void *v){
68		132	AVCodecContext *avctx = v;
69		132	ThreadContext *c = avctx->internal->frame_thread_encoder;
70
71	✓✓	897	while (!atomic_load(&c->exit)) {
72		896	int got_packet = 0, ret;
73			AVPacket *pkt;
74			AVFrame *frame;
75			Task *task;
76			unsigned task_index;
77
78		896	pthread_mutex_lock(&c->task_fifo_mutex);
79	✓✓✗✓	1719	while (c->next_task_index == c->task_index \|\| atomic_load(&c->exit)) {
80	✓✓	954	if (atomic_load(&c->exit)) {
81		131	pthread_mutex_unlock(&c->task_fifo_mutex);
82		131	goto end;
83			}
84		823	pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
85			}
86		765	task_index = c->next_task_index;
87		765	c->next_task_index = (c->next_task_index + 1) % c->max_tasks;
88		765	pthread_mutex_unlock(&c->task_fifo_mutex);
89			/* The main thread ensures that any two outstanding tasks have
90			* different indices, ergo each worker thread owns its element
91			* of c->tasks with the exception of finished, which is shared
92			* with the main thread and guarded by finished_task_mutex. */
93		765	task = &c->tasks[task_index];
94		765	frame = task->indata;
95		765	pkt = task->outdata;
96
97		765	ret = avctx->codec->encode2(avctx, pkt, frame, &got_packet);
98	✓✗	765	if(got_packet) {
99		765	int ret2 = av_packet_make_refcounted(pkt);
100	✓✗✗✓	765	if (ret >= 0 && ret2 < 0)
101			ret = ret2;
102		765	pkt->pts = pkt->dts = frame->pts;
103			} else {
104			pkt->data = NULL;
105			pkt->size = 0;
106			}
107		765	pthread_mutex_lock(&c->buffer_mutex);
108		765	av_frame_unref(frame);
109		765	pthread_mutex_unlock(&c->buffer_mutex);
110		765	pthread_mutex_lock(&c->finished_task_mutex);
111		765	task->return_code = ret;
112		765	task->finished = 1;
113		765	pthread_cond_signal(&c->finished_task_cond);
114		765	pthread_mutex_unlock(&c->finished_task_mutex);
115			}
116		1	end:
117		132	pthread_mutex_lock(&c->buffer_mutex);
118		132	avcodec_close(avctx);
119		132	pthread_mutex_unlock(&c->buffer_mutex);
120		132	av_freep(&avctx);
121		132	return NULL;
122			}
123
124		5994	int ff_frame_thread_encoder_init(AVCodecContext avctx, AVDictionary options){
125		5994	int i=0;
126			ThreadContext *c;
127
128
129	✓✓	5994	if( !(avctx->thread_type & FF_THREAD_FRAME)
130	✓✓	5962	\|\| !(avctx->codec->capabilities & AV_CODEC_CAP_FRAME_THREADS))
131		5663	return 0;
132
133	✓✓	331	if( !avctx->thread_count
134	✗✓	15	&& avctx->codec_id == AV_CODEC_ID_MJPEG
135			&& !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
136			av_log(avctx, AV_LOG_DEBUG,
137			"Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
138			"or a constant quantizer if you want to use multiple cpu cores\n");
139			avctx->thread_count = 1;
140			}
141	✓✓	331	if( avctx->thread_count > 1
142	✗✓	3	&& avctx->codec_id == AV_CODEC_ID_MJPEG
143			&& !(avctx->flags & AV_CODEC_FLAG_QSCALE))
144			av_log(avctx, AV_LOG_WARNING,
145			"MJPEG CBR encoding works badly with frame multi-threading, consider "
146			"using -threads 1, -thread_type slice or a constant quantizer.\n");
147
148	✓✓	331	if (avctx->codec_id == AV_CODEC_ID_HUFFYUV \|\|
149	✓✓	319	avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
150		32	int warn = 0;
151		32	int context_model = 0;
152		32	AVDictionaryEntry *con = av_dict_get(options, "context", NULL, AV_DICT_MATCH_CASE);
153
154	✗✓✗✗	32	if (con && con->value)
155			context_model = atoi(con->value);
156
157	✗✓	32	if (avctx->flags & AV_CODEC_FLAG_PASS1)
158			warn = 1;
159	✗✓	32	else if(context_model > 0) {
160			AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
161			NULL, AV_DICT_MATCH_CASE);
162			warn = !t \|\| !t->value \|\| !atoi(t->value) ? 1 : 0;
163			}
164			// huffyuv does not support these with multiple frame threads currently
165	✗✓	32	if (warn) {
166			av_log(avctx, AV_LOG_WARNING,
167			"Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
168			avctx->thread_count = 1;
169			}
170			}
171
172	✓✓	331	if(!avctx->thread_count) {
173		15	avctx->thread_count = av_cpu_count();
174		15	avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
175			}
176
177	✓✓	331	if(avctx->thread_count <= 1)
178		313	return 0;
179
180	✗✓	18	if(avctx->thread_count > MAX_THREADS)
181			return AVERROR(EINVAL);
182
183	✗✓	18	av_assert0(!avctx->internal->frame_thread_encoder);
184		18	c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
185	✗✓	18	if(!c)
186			return AVERROR(ENOMEM);
187
188		18	c->parent_avctx = avctx;
189
190		18	pthread_mutex_init(&c->task_fifo_mutex, NULL);
191		18	pthread_mutex_init(&c->finished_task_mutex, NULL);
192		18	pthread_mutex_init(&c->buffer_mutex, NULL);
193		18	pthread_cond_init(&c->task_fifo_cond, NULL);
194		18	pthread_cond_init(&c->finished_task_cond, NULL);
195		18	atomic_init(&c->exit, 0);
196
197		18	c->max_tasks = avctx->thread_count + 2;
198	✓✓	186	for (unsigned i = 0; i < c->max_tasks; i++) {
199	✓✗	168	if (!(c->tasks[i].indata = av_frame_alloc()) \|\|
200	✗✓	168	!(c->tasks[i].outdata = av_packet_alloc()))
201			goto fail;
202			}
203
204	✓✓	150	for(i=0; i<avctx->thread_count ; i++){
205		132	AVDictionary *tmp = NULL;
206			int ret;
207			void *tmpv;
208		132	AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
209	✗✓	132	if(!thread_avctx)
210			goto fail;
211		132	tmpv = thread_avctx->priv_data;
212		132	thread_avctx = avctx;
213		132	ret = av_opt_copy(thread_avctx, avctx);
214	✗✓	132	if (ret < 0)
215			goto fail;
216		132	thread_avctx->priv_data = tmpv;
217		132	thread_avctx->internal = NULL;
218	✓✗	132	if (avctx->codec->priv_class) {
219		132	int ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
220	✗✓	132	if (ret < 0)
221			goto fail;
222			} else if (avctx->codec->priv_data_size) {
223			memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
224			}
225		132	thread_avctx->thread_count = 1;
226		132	thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
227
228		132	av_dict_copy(&tmp, options, 0);
229		132	av_dict_set(&tmp, "threads", "1", 0);
230	✗✓	132	if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
231			av_dict_free(&tmp);
232			goto fail;
233			}
234		132	av_dict_free(&tmp);
235	✗✓	132	av_assert0(!thread_avctx->internal->frame_thread_encoder);
236		132	thread_avctx->internal->frame_thread_encoder = c;
237	✗✓	132	if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
238			goto fail;
239			}
240			}
241
242		18	avctx->active_thread_type = FF_THREAD_FRAME;
243
244		18	return 0;
245			fail:
246			avctx->thread_count = i;
247			av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
248			ff_frame_thread_encoder_free(avctx);
249			return -1;
250			}
251
252		18	void ff_frame_thread_encoder_free(AVCodecContext *avctx){
253			int i;
254		18	ThreadContext *c= avctx->internal->frame_thread_encoder;
255
256		18	pthread_mutex_lock(&c->task_fifo_mutex);
257		18	atomic_store(&c->exit, 1);
258		18	pthread_cond_broadcast(&c->task_fifo_cond);
259		18	pthread_mutex_unlock(&c->task_fifo_mutex);
260
261	✓✓	150	for (i=0; i<avctx->thread_count; i++) {
262		132	pthread_join(c->worker[i], NULL);
263			}
264
265	✓✓	186	for (unsigned i = 0; i < c->max_tasks; i++) {
266		168	av_frame_free(&c->tasks[i].indata);
267		168	av_packet_free(&c->tasks[i].outdata);
268			}
269
270		18	pthread_mutex_destroy(&c->task_fifo_mutex);
271		18	pthread_mutex_destroy(&c->finished_task_mutex);
272		18	pthread_mutex_destroy(&c->buffer_mutex);
273		18	pthread_cond_destroy(&c->task_fifo_cond);
274		18	pthread_cond_destroy(&c->finished_task_cond);
275		18	av_freep(&avctx->internal->frame_thread_encoder);
276		18	}
277
278		885	int ff_thread_video_encode_frame(AVCodecContext avctx, AVPacket pkt,
279			AVFrame frame, int got_packet_ptr)
280			{
281		885	ThreadContext *c = avctx->internal->frame_thread_encoder;
282			Task *outtask;
283
284			av_assert1(!*got_packet_ptr);
285
286	✓✓	885	if(frame){
287		765	av_frame_move_ref(c->tasks[c->task_index].indata, frame);
288
289		765	pthread_mutex_lock(&c->task_fifo_mutex);
290		765	c->task_index = (c->task_index + 1) % c->max_tasks;
291		765	pthread_cond_signal(&c->task_fifo_cond);
292		765	pthread_mutex_unlock(&c->task_fifo_mutex);
293			}
294
295		885	outtask = &c->tasks[c->finished_task_index];
296		885	pthread_mutex_lock(&c->finished_task_mutex);
297			/* The access to task_index in the following code is ok,
298			* because it is only ever changed by the main thread. */
299	✓✓✓✓	885	if (c->task_index == c->finished_task_index \|\|
300	✓✓	765	(frame && !outtask->finished &&
301	✓✓	156	(c->task_index - c->finished_task_index + c->max_tasks) % c->max_tasks <= avctx->thread_count)) {
302		120	pthread_mutex_unlock(&c->finished_task_mutex);
303		120	return 0;
304			}
305	✓✓	943	while (!outtask->finished) {
306		178	pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
307			}
308		765	pthread_mutex_unlock(&c->finished_task_mutex);
309			/* We now own outtask completely: No worker thread touches it any more,
310			* because there is no outstanding task with this index. */
311		765	outtask->finished = 0;
312		765	av_packet_move_ref(pkt, outtask->outdata);
313	✓✗	765	if(pkt->data)
314		765	*got_packet_ptr = 1;
315		765	c->finished_task_index = (c->finished_task_index + 1) % c->max_tasks;
316
317		765	return outtask->return_code;
318			}