FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/pthread.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 37 45 82.2%
Branches: 9 14 64.3%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file
21 * Libavfilter multithreading support
22 */
23
24 #include <stddef.h>
25
26 #include "libavutil/error.h"
27 #include "libavutil/macros.h"
28 #include "libavutil/mem.h"
29 #include "libavutil/slicethread.h"
30
31 #include "avfilter.h"
32 #include "internal.h"
33 #include "thread.h"
34
35 typedef struct ThreadContext {
36 AVFilterGraph *graph;
37 AVSliceThread *thread;
38 avfilter_action_func *func;
39
40 /* per-execute parameters */
41 AVFilterContext *ctx;
42 void *arg;
43 int *rets;
44 } ThreadContext;
45
46 25839 static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
47 {
48 25839 ThreadContext *c = priv;
49 25839 int ret = c->func(c->ctx, c->arg, jobnr, nb_jobs);
50
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25839 if (c->rets)
51 c->rets[jobnr] = ret;
52 25839 }
53
54 2529 static void slice_thread_uninit(ThreadContext *c)
55 {
56 2529 avpriv_slicethread_free(&c->thread);
57 2529 }
58
59 4038 static int thread_execute(AVFilterContext *ctx, avfilter_action_func *func,
60 void *arg, int *ret, int nb_jobs)
61 {
62 4038 ThreadContext *c = ctx->graph->internal->thread;
63
64
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4038 if (nb_jobs <= 0)
65 return 0;
66 4038 c->ctx = ctx;
67 4038 c->arg = arg;
68 4038 c->func = func;
69 4038 c->rets = ret;
70
71 4038 avpriv_slicethread_execute(c->thread, nb_jobs, 0);
72 4038 return 0;
73 }
74
75 2529 static int thread_init_internal(ThreadContext *c, int nb_threads)
76 {
77 2529 nb_threads = avpriv_slicethread_create(&c->thread, c, worker_func, NULL, nb_threads);
78
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2529 if (nb_threads <= 1)
79 avpriv_slicethread_free(&c->thread);
80 2529 return FFMAX(nb_threads, 1);
81 }
82
83 6412 int ff_graph_thread_init(AVFilterGraph *graph)
84 {
85 int ret;
86
87
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6412 if (graph->nb_threads == 1) {
88 3883 graph->thread_type = 0;
89 3883 return 0;
90 }
91
92 2529 graph->internal->thread = av_mallocz(sizeof(ThreadContext));
93
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2529 if (!graph->internal->thread)
94 return AVERROR(ENOMEM);
95
96 2529 ret = thread_init_internal(graph->internal->thread, graph->nb_threads);
97
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2529 if (ret <= 1) {
98 av_freep(&graph->internal->thread);
99 graph->thread_type = 0;
100 graph->nb_threads = 1;
101 return (ret < 0) ? ret : 0;
102 }
103 2529 graph->nb_threads = ret;
104
105 2529 graph->internal->thread_execute = thread_execute;
106
107 2529 return 0;
108 }
109
110 6412 void ff_graph_thread_free(AVFilterGraph *graph)
111 {
112
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6412 if (graph->internal->thread)
113 2529 slice_thread_uninit(graph->internal->thread);
114 6412 av_freep(&graph->internal->thread);
115 6412 }
116