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
|
/*
* Copyright (c) 2021 Paul B Mahol
*
* 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 "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "video.h"
typedef struct LatencyContext {
int64_t min_latency;
int64_t max_latency;
int64_t sum;
} LatencyContext;
static av_cold int init(AVFilterContext *ctx)
{
LatencyContext *s = ctx->priv;
s->min_latency = INT64_MAX;
s->max_latency = INT64_MIN;
return 0;
}
static int activate(AVFilterContext *ctx)
{
LatencyContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
FilterLink *inl = ff_filter_link(inlink);
AVFilterLink *outlink = ctx->outputs[0];
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (!ctx->is_disabled && ctx->inputs[0]->src &&
ctx->inputs[0]->src->nb_inputs > 0) {
AVFilterLink *prevlink = ctx->inputs[0]->src->inputs[0];
FilterLink *prevl = ff_filter_link(prevlink);
int64_t delta = 0;
switch (prevlink->type) {
case AVMEDIA_TYPE_AUDIO:
delta = prevl->sample_count_in - inl->sample_count_out;
break;
case AVMEDIA_TYPE_VIDEO:
delta = prevl->frame_count_in - inl->frame_count_out;
break;
}
if (delta > 0) {
s->min_latency = FFMIN(s->min_latency, delta);
s->max_latency = FFMAX(s->max_latency, delta);
}
}
if (ff_inlink_queued_frames(inlink)) {
AVFrame *frame = NULL;
int ret;
ret = ff_inlink_consume_frame(inlink, &frame);
if (ret < 0)
return ret;
if (ret > 0)
return ff_filter_frame(outlink, frame);
}
FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static av_cold void uninit(AVFilterContext *ctx)
{
LatencyContext *s = ctx->priv;
if (s->min_latency != INT64_MAX)
av_log(ctx, AV_LOG_INFO, "Min latency: %"PRId64"\n", s->min_latency);
if (s->max_latency != INT64_MIN)
av_log(ctx, AV_LOG_INFO, "Max latency: %"PRId64"\n", s->max_latency);
}
#if CONFIG_LATENCY_FILTER
const AVFilter ff_vf_latency = {
.name = "latency",
.description = NULL_IF_CONFIG_SMALL("Report video filtering latency."),
.priv_size = sizeof(LatencyContext),
.init = init,
.uninit = uninit,
.activate = activate,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(ff_video_default_filterpad),
FILTER_OUTPUTS(ff_video_default_filterpad),
};
#endif // CONFIG_LATENCY_FILTER
#if CONFIG_ALATENCY_FILTER
const AVFilter ff_af_alatency = {
.name = "alatency",
.description = NULL_IF_CONFIG_SMALL("Report audio filtering latency."),
.priv_size = sizeof(LatencyContext),
.init = init,
.uninit = uninit,
.activate = activate,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
FILTER_INPUTS(ff_audio_default_filterpad),
FILTER_OUTPUTS(ff_audio_default_filterpad),
};
#endif // CONFIG_ALATENCY_FILTER
|
