FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/pthread_slice.c
Date: 2024-10-17 22:24:08
Exec Total Coverage
Lines: 44 68 64.7%
Functions: 4 7 57.1%
Branches: 19 32 59.4%
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 * Slice multithreading support functions
22 * @see doc/multithreading.txt
23 */
24
25 #include "config.h"
26
27 #include "avcodec.h"
28 #include "codec_internal.h"
29 #include "internal.h"
30 #include "pthread_internal.h"
31 #include "thread.h"
32
33 #include "libavutil/avassert.h"
34 #include "libavutil/common.h"
35 #include "libavutil/cpu.h"
36 #include "libavutil/mem.h"
37 #include "libavutil/thread.h"
38 #include "libavutil/slicethread.h"
39
40 typedef int (action_func)(AVCodecContext *c, void *arg);
41 typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
42 typedef int (main_func)(AVCodecContext *c);
43
44 typedef struct SliceThreadContext {
45 AVSliceThread *thread;
46 action_func *func;
47 action_func2 *func2;
48 main_func *mainfunc;
49 void *args;
50 int *rets;
51 int job_size;
52 } SliceThreadContext;
53
54 ✗ static void main_function(void *priv) {
55 ✗ AVCodecContext *avctx = priv;
56 ✗ SliceThreadContext *c = avctx->internal->thread_ctx;
57 ✗ c->mainfunc(avctx);
58 ✗ }
59
60 12382 static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
61 {
62 12382 AVCodecContext *avctx = priv;
63 12382 SliceThreadContext *c = avctx->internal->thread_ctx;
64 int ret;
65
66 12382 ret = c->func ? c->func(avctx, (char *)c->args + c->job_size * jobnr)
67
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 12382 : c->func2(avctx, c->args, jobnr, threadnr);
68
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 12382 if (c->rets)
69 ✗ c->rets[jobnr] = ret;
70 12382 }
71
72 20 void ff_slice_thread_free(AVCodecContext *avctx)
73 {
74 20 SliceThreadContext *c = avctx->internal->thread_ctx;
75
76 20 avpriv_slicethread_free(&c->thread);
77
78 20 av_freep(&avctx->internal->thread_ctx);
79 20 }
80
81 2679 static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
82 {
83 2679 SliceThreadContext *c = avctx->internal->thread_ctx;
84
85
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 2679 if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
86 ✗ return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
87
88
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 2679 if (job_count <= 0)
89 5 return 0;
90
91 2674 c->job_size = job_size;
92 2674 c->args = arg;
93 2674 c->func = func;
94 2674 c->rets = ret;
95
96 2674 avpriv_slicethread_execute(c->thread, job_count, !!c->mainfunc );
97 2674 return 0;
98 }
99
100 ✗ static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
101 {
102 ✗ SliceThreadContext *c = avctx->internal->thread_ctx;
103 ✗ c->func2 = func2;
104 ✗ return thread_execute(avctx, NULL, arg, ret, job_count, 0);
105 }
106
107 ✗ int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx, action_func2* func2, main_func *mainfunc, void *arg, int *ret, int job_count)
108 {
109 ✗ SliceThreadContext *c = avctx->internal->thread_ctx;
110 ✗ c->func2 = func2;
111 ✗ c->mainfunc = mainfunc;
112 ✗ return thread_execute(avctx, NULL, arg, ret, job_count, 0);
113 }
114
115 23 int ff_slice_thread_init(AVCodecContext *avctx)
116 {
117 SliceThreadContext *c;
118 23 int thread_count = avctx->thread_count;
119 void (*mainfunc)(void *);
120
121 // We cannot do this in the encoder init as the threads are created before
122
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 23 if (av_codec_is_encoder(avctx->codec) &&
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 17 avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO &&
124 ✗ avctx->height > 2800)
125 ✗ thread_count = avctx->thread_count = 1;
126
127
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 23 if (!thread_count) {
128 5 int nb_cpus = av_cpu_count();
129
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 5 if (avctx->height)
130 5 nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
131 // use number of cores + 1 as thread count if there is more than one
132
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 5 if (nb_cpus > 1)
133 2 thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
134 else
135 3 thread_count = avctx->thread_count = 1;
136 }
137
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 23 if (thread_count <= 1) {
139 3 avctx->active_thread_type = 0;
140 3 return 0;
141 }
142
143 20 avctx->internal->thread_ctx = c = av_mallocz(sizeof(*c));
144
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 20 mainfunc = ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SLICE_THREAD_HAS_MF ? &main_function : NULL;
145
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 20 if (!c || (thread_count = avpriv_slicethread_create(&c->thread, avctx, worker_func, mainfunc, thread_count)) <= 1) {
146 ✗ if (c)
147 ✗ avpriv_slicethread_free(&c->thread);
148 ✗ av_freep(&avctx->internal->thread_ctx);
149 ✗ avctx->thread_count = 1;
150 ✗ avctx->active_thread_type = 0;
151 ✗ return 0;
152 }
153 20 avctx->thread_count = thread_count;
154
155 20 avctx->execute = thread_execute;
156 20 avctx->execute2 = thread_execute2;
157 20 return 0;
158 }
159