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
|
/*
* Copyright (c) 2015 Nicolas George
*
* 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 "config_components.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "video.h"
#include <float.h>
typedef struct RealtimeContext {
const AVClass *class;
int64_t delta;
int64_t limit;
double speed;
unsigned inited;
} RealtimeContext;
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
RealtimeContext *s = ctx->priv;
if (frame->pts != AV_NOPTS_VALUE) {
int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q) / s->speed;
int64_t now = av_gettime_relative();
int64_t sleep = pts - now + s->delta;
if (!s->inited) {
s->inited = 1;
sleep = 0;
s->delta = now - pts;
}
if (FFABS(sleep) > s->limit / s->speed) {
av_log(ctx, AV_LOG_WARNING,
"time discontinuity detected: %"PRIi64" us, resetting\n",
sleep);
sleep = 0;
s->delta = now - pts;
}
if (sleep > 0) {
av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep);
for (; sleep > 600000000; sleep -= 600000000)
av_usleep(600000000);
av_usleep(sleep);
}
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
#define OFFSET(x) offsetof(RealtimeContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption options[] = {
{ "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS },
{ "speed", "speed factor", OFFSET(speed), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, DBL_MIN, DBL_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS_EXT(realtime, "(a)realtime", options);
#if CONFIG_REALTIME_FILTER
static const AVFilterPad avfilter_vf_realtime_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
const AVFilter ff_vf_realtime = {
.name = "realtime",
.description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
.priv_size = sizeof(RealtimeContext),
.priv_class = &realtime_class,
.flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(avfilter_vf_realtime_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
.process_command = ff_filter_process_command,
};
#endif /* CONFIG_REALTIME_FILTER */
#if CONFIG_AREALTIME_FILTER
static const AVFilterPad arealtime_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
};
const AVFilter ff_af_arealtime = {
.name = "arealtime",
.description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
.priv_class = &realtime_class,
.priv_size = sizeof(RealtimeContext),
.flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(arealtime_inputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
.process_command = ff_filter_process_command,
};
#endif /* CONFIG_AREALTIME_FILTER */
|
