FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/f_realtime.c
Date: 2024-04-12 08:31:17
Exec Total Coverage
Lines: 0 21 0.0%
Functions: 0 1 0.0%
Branches: 0 12 0.0%

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1 /*
2 * Copyright (c) 2015 Nicolas George
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "config_components.h"
22
23 #include "libavutil/opt.h"
24 #include "libavutil/time.h"
25 #include "audio.h"
26 #include "avfilter.h"
27 #include "internal.h"
28 #include "video.h"
29 #include <float.h>
30
31 typedef struct RealtimeContext {
32 const AVClass *class;
33 int64_t delta;
34 int64_t limit;
35 double speed;
36 unsigned inited;
37 } RealtimeContext;
38
39 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
40 {
41 AVFilterContext *ctx = inlink->dst;
42 RealtimeContext *s = ctx->priv;
43
44 if (frame->pts != AV_NOPTS_VALUE) {
45 int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q) / s->speed;
46 int64_t now = av_gettime_relative();
47 int64_t sleep = pts - now + s->delta;
48 if (!s->inited) {
49 s->inited = 1;
50 sleep = 0;
51 s->delta = now - pts;
52 }
53 if (FFABS(sleep) > s->limit / s->speed) {
54 av_log(ctx, AV_LOG_WARNING,
55 "time discontinuity detected: %"PRIi64" us, resetting\n",
56 sleep);
57 sleep = 0;
58 s->delta = now - pts;
59 }
60 if (sleep > 0) {
61 av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep);
62 for (; sleep > 600000000; sleep -= 600000000)
63 av_usleep(600000000);
64 av_usleep(sleep);
65 }
66 }
67 return ff_filter_frame(inlink->dst->outputs[0], frame);
68 }
69
70 #define OFFSET(x) offsetof(RealtimeContext, x)
71 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
72 static const AVOption options[] = {
73 { "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS },
74 { "speed", "speed factor", OFFSET(speed), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, DBL_MIN, DBL_MAX, FLAGS },
75 { NULL }
76 };
77
78 AVFILTER_DEFINE_CLASS_EXT(realtime, "(a)realtime", options);
79
80 #if CONFIG_REALTIME_FILTER
81
82 static const AVFilterPad avfilter_vf_realtime_inputs[] = {
83 {
84 .name = "default",
85 .type = AVMEDIA_TYPE_VIDEO,
86 .filter_frame = filter_frame,
87 },
88 };
89
90 const AVFilter ff_vf_realtime = {
91 .name = "realtime",
92 .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
93 .priv_size = sizeof(RealtimeContext),
94 .priv_class = &realtime_class,
95 .flags = AVFILTER_FLAG_METADATA_ONLY,
96 FILTER_INPUTS(avfilter_vf_realtime_inputs),
97 FILTER_OUTPUTS(ff_video_default_filterpad),
98 .process_command = ff_filter_process_command,
99 };
100 #endif /* CONFIG_REALTIME_FILTER */
101
102 #if CONFIG_AREALTIME_FILTER
103
104 static const AVFilterPad arealtime_inputs[] = {
105 {
106 .name = "default",
107 .type = AVMEDIA_TYPE_AUDIO,
108 .filter_frame = filter_frame,
109 },
110 };
111
112 const AVFilter ff_af_arealtime = {
113 .name = "arealtime",
114 .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
115 .priv_class = &realtime_class,
116 .priv_size = sizeof(RealtimeContext),
117 .flags = AVFILTER_FLAG_METADATA_ONLY,
118 FILTER_INPUTS(arealtime_inputs),
119 FILTER_OUTPUTS(ff_audio_default_filterpad),
120 .process_command = ff_filter_process_command,
121 };
122 #endif /* CONFIG_AREALTIME_FILTER */
123