FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/pthread.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 38 46 82.6%
Functions: 6 6 100.0%
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 "avfilter_internal.h"
33
34 typedef struct ThreadContext {
35 AVFilterGraph *graph;
36 AVSliceThread *thread;
37 avfilter_action_func *func;
38
39 /* per-execute parameters */
40 AVFilterContext *ctx;
41 void *arg;
42 int *rets;
43 } ThreadContext;
44
45 27005 static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
46 {
47 27005 ThreadContext *c = priv;
48 27005 int ret = c->func(c->ctx, c->arg, jobnr, nb_jobs);
49
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27005 if (c->rets)
50 c->rets[jobnr] = ret;
51 27005 }
52
53 2617 static void slice_thread_uninit(ThreadContext *c)
54 {
55 2617 avpriv_slicethread_free(&c->thread);
56 2617 }
57
58 3452 static int thread_execute(AVFilterContext *ctx, avfilter_action_func *func,
59 void *arg, int *ret, int nb_jobs)
60 {
61 3452 ThreadContext *c = fffiltergraph(ctx->graph)->thread;
62
63
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3452 if (nb_jobs <= 0)
64 return 0;
65 3452 c->ctx = ctx;
66 3452 c->arg = arg;
67 3452 c->func = func;
68 3452 c->rets = ret;
69
70 3452 avpriv_slicethread_execute(c->thread, nb_jobs, 0);
71 3452 return 0;
72 }
73
74 2617 static int thread_init_internal(ThreadContext *c, int nb_threads)
75 {
76 2617 nb_threads = avpriv_slicethread_create(&c->thread, c, worker_func, NULL, nb_threads);
77
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2617 if (nb_threads <= 1)
78 avpriv_slicethread_free(&c->thread);
79 2617 return FFMAX(nb_threads, 1);
80 }
81
82 12918 int ff_graph_thread_init(FFFilterGraph *graphi)
83 {
84 12918 AVFilterGraph *graph = &graphi->p;
85 int ret;
86
87
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12918 if (graph->nb_threads == 1) {
88 10301 graph->thread_type = 0;
89 10301 return 0;
90 }
91
92 2617 graphi->thread = av_mallocz(sizeof(ThreadContext));
93
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2617 if (!graphi->thread)
94 return AVERROR(ENOMEM);
95
96 2617 ret = thread_init_internal(graphi->thread, graph->nb_threads);
97
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2617 if (ret <= 1) {
98 av_freep(&graphi->thread);
99 graph->thread_type = 0;
100 graph->nb_threads = 1;
101 return (ret < 0) ? ret : 0;
102 }
103 2617 graph->nb_threads = ret;
104
105 2617 graphi->thread_execute = thread_execute;
106
107 2617 return 0;
108 }
109
110 12918 void ff_graph_thread_free(FFFilterGraph *graph)
111 {
112
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12918 if (graph->thread)
113 2617 slice_thread_uninit(graph->thread);
114 12918 av_freep(&graph->thread);
115 12918 }
116