1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* 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
*/
/**
* @file
* Slice multithreading support functions
* @see doc/multithreading.txt
*/
#include "avcodec.h"
#include "codec_internal.h"
#include "internal.h"
#include "pthread_internal.h"
#include "thread.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/macros.h"
#include "libavutil/mem.h"
#include "libavutil/slicethread.h"
typedef int (action_func)(AVCodecContext *c, void *arg);
typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
typedef int (main_func)(AVCodecContext *c);
typedef struct SliceThreadContext {
AVSliceThread *thread;
action_func *func;
action_func2 *func2;
main_func *mainfunc;
void *args;
int *rets;
int job_size;
} SliceThreadContext;
static void main_function(void *priv) {
AVCodecContext *avctx = priv;
SliceThreadContext *c = avctx->internal->thread_ctx;
c->mainfunc(avctx);
}
static void worker_func(void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)
{
AVCodecContext *avctx = priv;
SliceThreadContext *c = avctx->internal->thread_ctx;
int ret;
ret = c->func ? c->func(avctx, (char *)c->args + c->job_size * jobnr)
: c->func2(avctx, c->args, jobnr, threadnr);
if (c->rets)
c->rets[jobnr] = ret;
}
av_cold void ff_slice_thread_free(AVCodecContext *avctx)
{
SliceThreadContext *c = avctx->internal->thread_ctx;
avpriv_slicethread_free(&c->thread);
av_freep(&avctx->internal->thread_ctx);
}
static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
{
SliceThreadContext *c = avctx->internal->thread_ctx;
if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
if (job_count <= 0)
return 0;
c->job_size = job_size;
c->args = arg;
c->func = func;
c->rets = ret;
avpriv_slicethread_execute(c->thread, job_count, !!c->mainfunc );
return 0;
}
static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
{
SliceThreadContext *c = avctx->internal->thread_ctx;
c->func2 = func2;
return thread_execute(avctx, NULL, arg, ret, job_count, 0);
}
int ff_slice_thread_execute_with_mainfunc(AVCodecContext *avctx, action_func2* func2, main_func *mainfunc, void *arg, int *ret, int job_count)
{
SliceThreadContext *c = avctx->internal->thread_ctx;
c->func2 = func2;
c->mainfunc = mainfunc;
return thread_execute(avctx, NULL, arg, ret, job_count, 0);
}
av_cold int ff_slice_thread_init(AVCodecContext *avctx)
{
SliceThreadContext *c;
int thread_count = avctx->thread_count;
void (*mainfunc)(void *);
if (!thread_count) {
int nb_cpus = av_cpu_count();
if (avctx->height)
nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
// use number of cores + 1 as thread count if there is more than one
if (nb_cpus > 1)
thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
else
thread_count = avctx->thread_count = 1;
}
if (thread_count <= 1) {
avctx->active_thread_type = 0;
return 0;
}
avctx->internal->thread_ctx = c = av_mallocz(sizeof(*c));
if (!c)
return AVERROR(ENOMEM);
mainfunc = ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SLICE_THREAD_HAS_MF ? &main_function : NULL;
thread_count = avpriv_slicethread_create(&c->thread, avctx, worker_func,
mainfunc, thread_count);
if (thread_count <= 1) {
ff_slice_thread_free(avctx);
avctx->thread_count = 1;
avctx->active_thread_type = 0;
return thread_count < 0 ? thread_count : 0;
}
avctx->thread_count = thread_count;
avctx->execute = thread_execute;
avctx->execute2 = thread_execute2;
return 0;
}
|
