FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/f_cue.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 0 36 0.0%
Functions: 0 1 0.0%
Branches: 0 30 0.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2018 Marton Balint
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 "filters.h"
28 #include "internal.h"
29 #include "video.h"
30
31 typedef struct CueContext {
32 const AVClass *class;
33 int64_t first_pts;
34 int64_t cue;
35 int64_t preroll;
36 int64_t buffer;
37 int status;
38 } CueContext;
39
40 static int activate(AVFilterContext *ctx)
41 {
42 AVFilterLink *inlink = ctx->inputs[0];
43 AVFilterLink *outlink = ctx->outputs[0];
44 CueContext *s = ctx->priv;
45
46 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
47
48 if (ff_inlink_queued_frames(inlink)) {
49 AVFrame *frame = ff_inlink_peek_frame(inlink, 0);
50 int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
51
52 if (!s->status) {
53 s->first_pts = pts;
54 s->status++;
55 }
56 if (s->status == 1) {
57 if (pts - s->first_pts < s->preroll) {
58 int ret = ff_inlink_consume_frame(inlink, &frame);
59 if (ret < 0)
60 return ret;
61 return ff_filter_frame(outlink, frame);
62 }
63 s->first_pts = pts;
64 s->status++;
65 }
66 if (s->status == 2) {
67 frame = ff_inlink_peek_frame(inlink, ff_inlink_queued_frames(inlink) - 1);
68 pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
69 if (!(pts - s->first_pts < s->buffer && (av_gettime() - s->cue) < 0))
70 s->status++;
71 }
72 if (s->status == 3) {
73 int64_t diff;
74 while ((diff = (av_gettime() - s->cue)) < 0)
75 av_usleep(av_clip(-diff / 2, 100, 1000000));
76 s->status++;
77 }
78 if (s->status == 4) {
79 int ret = ff_inlink_consume_frame(inlink, &frame);
80 if (ret < 0)
81 return ret;
82 return ff_filter_frame(outlink, frame);
83 }
84 }
85
86 FF_FILTER_FORWARD_STATUS(inlink, outlink);
87 FF_FILTER_FORWARD_WANTED(outlink, inlink);
88
89 return FFERROR_NOT_READY;
90 }
91
92 #define OFFSET(x) offsetof(CueContext, x)
93 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
94 static const AVOption options[] = {
95 { "cue", "cue unix timestamp in microseconds", OFFSET(cue), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
96 { "preroll", "preroll duration in seconds", OFFSET(preroll), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
97 { "buffer", "buffer duration in seconds", OFFSET(buffer), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
98 { NULL }
99 };
100
101 AVFILTER_DEFINE_CLASS_EXT(cue_acue, "(a)cue", options);
102
103 #if CONFIG_CUE_FILTER
104 const AVFilter ff_vf_cue = {
105 .name = "cue",
106 .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
107 .priv_class = &cue_acue_class,
108 .priv_size = sizeof(CueContext),
109 FILTER_INPUTS(ff_video_default_filterpad),
110 FILTER_OUTPUTS(ff_video_default_filterpad),
111 .activate = activate,
112 };
113 #endif /* CONFIG_CUE_FILTER */
114
115 #if CONFIG_ACUE_FILTER
116 const AVFilter ff_af_acue = {
117 .name = "acue",
118 .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
119 .priv_class = &cue_acue_class,
120 .priv_size = sizeof(CueContext),
121 .flags = AVFILTER_FLAG_METADATA_ONLY,
122 FILTER_INPUTS(ff_audio_default_filterpad),
123 FILTER_OUTPUTS(ff_audio_default_filterpad),
124 .activate = activate,
125 };
126 #endif /* CONFIG_ACUE_FILTER */
127