FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/f_cue.c
Date: 2022-12-05 03:11:11
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 "avfilter.h"
26 #include "filters.h"
27 #include "internal.h"
28
29 typedef struct CueContext {
30 const AVClass *class;
31 int64_t first_pts;
32 int64_t cue;
33 int64_t preroll;
34 int64_t buffer;
35 int status;
36 } CueContext;
37
38 static int activate(AVFilterContext *ctx)
39 {
40 AVFilterLink *inlink = ctx->inputs[0];
41 AVFilterLink *outlink = ctx->outputs[0];
42 CueContext *s = ctx->priv;
43
44 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
45
46 if (ff_inlink_queued_frames(inlink)) {
47 AVFrame *frame = ff_inlink_peek_frame(inlink, 0);
48 int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
49
50 if (!s->status) {
51 s->first_pts = pts;
52 s->status++;
53 }
54 if (s->status == 1) {
55 if (pts - s->first_pts < s->preroll) {
56 int ret = ff_inlink_consume_frame(inlink, &frame);
57 if (ret < 0)
58 return ret;
59 return ff_filter_frame(outlink, frame);
60 }
61 s->first_pts = pts;
62 s->status++;
63 }
64 if (s->status == 2) {
65 frame = ff_inlink_peek_frame(inlink, ff_inlink_queued_frames(inlink) - 1);
66 pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
67 if (!(pts - s->first_pts < s->buffer && (av_gettime() - s->cue) < 0))
68 s->status++;
69 }
70 if (s->status == 3) {
71 int64_t diff;
72 while ((diff = (av_gettime() - s->cue)) < 0)
73 av_usleep(av_clip(-diff / 2, 100, 1000000));
74 s->status++;
75 }
76 if (s->status == 4) {
77 int ret = ff_inlink_consume_frame(inlink, &frame);
78 if (ret < 0)
79 return ret;
80 return ff_filter_frame(outlink, frame);
81 }
82 }
83
84 FF_FILTER_FORWARD_STATUS(inlink, outlink);
85 FF_FILTER_FORWARD_WANTED(outlink, inlink);
86
87 return FFERROR_NOT_READY;
88 }
89
90 #define OFFSET(x) offsetof(CueContext, x)
91 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
92 static const AVOption options[] = {
93 { "cue", "cue unix timestamp in microseconds", OFFSET(cue), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
94 { "preroll", "preroll duration in seconds", OFFSET(preroll), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
95 { "buffer", "buffer duration in seconds", OFFSET(buffer), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS },
96 { NULL }
97 };
98
99 AVFILTER_DEFINE_CLASS_EXT(cue_acue, "(a)cue", options);
100
101 #if CONFIG_CUE_FILTER
102 static const AVFilterPad cue_inputs[] = {
103 {
104 .name = "default",
105 .type = AVMEDIA_TYPE_VIDEO,
106 },
107 };
108
109 static const AVFilterPad cue_outputs[] = {
110 {
111 .name = "default",
112 .type = AVMEDIA_TYPE_VIDEO,
113 },
114 };
115
116 const AVFilter ff_vf_cue = {
117 .name = "cue",
118 .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
119 .priv_class = &cue_acue_class,
120 .priv_size = sizeof(CueContext),
121 FILTER_INPUTS(cue_inputs),
122 FILTER_OUTPUTS(cue_outputs),
123 .activate = activate,
124 };
125 #endif /* CONFIG_CUE_FILTER */
126
127 #if CONFIG_ACUE_FILTER
128 static const AVFilterPad acue_inputs[] = {
129 {
130 .name = "default",
131 .type = AVMEDIA_TYPE_AUDIO,
132 },
133 };
134
135 static const AVFilterPad acue_outputs[] = {
136 {
137 .name = "default",
138 .type = AVMEDIA_TYPE_AUDIO,
139 },
140 };
141
142 const AVFilter ff_af_acue = {
143 .name = "acue",
144 .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."),
145 .priv_class = &cue_acue_class,
146 .priv_size = sizeof(CueContext),
147 .flags = AVFILTER_FLAG_METADATA_ONLY,
148 FILTER_INPUTS(acue_inputs),
149 FILTER_OUTPUTS(acue_outputs),
150 .activate = activate,
151 };
152 #endif /* CONFIG_ACUE_FILTER */
153