FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/settb.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 40 46 87.0%
Functions: 4 4 100.0%
Branches: 11 18 61.1%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2010 Stefano Sabatini
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
8 * License 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * Set timebase for the output link.
24 */
25
26 #include "config_components.h"
27
28 #include <inttypes.h>
29 #include <stdio.h>
30
31 #include "libavutil/avstring.h"
32 #include "libavutil/eval.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/rational.h"
37 #include "audio.h"
38 #include "avfilter.h"
39 #include "filters.h"
40 #include "internal.h"
41 #include "video.h"
42
43 static const char *const var_names[] = {
44 "AVTB", /* default timebase 1/AV_TIME_BASE */
45 "intb", /* input timebase */
46 "sr", /* sample rate */
47 NULL
48 };
49
50 enum var_name {
51 VAR_AVTB,
52 VAR_INTB,
53 VAR_SR,
54 VAR_VARS_NB
55 };
56
57 typedef struct SetTBContext {
58 const AVClass *class;
59 char *tb_expr;
60 double var_values[VAR_VARS_NB];
61 } SetTBContext;
62
63 #define OFFSET(x) offsetof(SetTBContext, x)
64 #define DEFINE_OPTIONS(filt_name, filt_type) \
65 static const AVOption filt_name##_options[] = { \
66 { "expr", "set expression determining the output timebase", OFFSET(tb_expr), AV_OPT_TYPE_STRING, {.str="intb"}, \
67 .flags=AV_OPT_FLAG_##filt_type##_PARAM|AV_OPT_FLAG_FILTERING_PARAM }, \
68 { "tb", "set expression determining the output timebase", OFFSET(tb_expr), AV_OPT_TYPE_STRING, {.str="intb"}, \
69 .flags=AV_OPT_FLAG_##filt_type##_PARAM|AV_OPT_FLAG_FILTERING_PARAM }, \
70 { NULL } \
71 }
72
73 1 static int config_output_props(AVFilterLink *outlink)
74 {
75 1 AVFilterContext *ctx = outlink->src;
76 1 SetTBContext *settb = ctx->priv;
77 1 AVFilterLink *inlink = ctx->inputs[0];
78 AVRational time_base;
79 int ret;
80 double res;
81
82 1 settb->var_values[VAR_AVTB] = av_q2d(AV_TIME_BASE_Q);
83 1 settb->var_values[VAR_INTB] = av_q2d(inlink->time_base);
84 1 settb->var_values[VAR_SR] = inlink->sample_rate;
85
86 1 outlink->w = inlink->w;
87 1 outlink->h = inlink->h;
88
89
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1 if ((ret = av_expr_parse_and_eval(&res, settb->tb_expr, var_names, settb->var_values,
90 NULL, NULL, NULL, NULL, NULL, 0, NULL)) < 0) {
91 av_log(ctx, AV_LOG_ERROR, "Invalid expression '%s' for timebase.\n", settb->tb_expr);
92 return ret;
93 }
94 1 time_base = av_d2q(res, INT_MAX);
95
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1 if (time_base.num <= 0 || time_base.den <= 0) {
96 av_log(ctx, AV_LOG_ERROR,
97 "Invalid non-positive values for the timebase num:%d or den:%d.\n",
98 time_base.num, time_base.den);
99 return AVERROR(EINVAL);
100 }
101
102 1 outlink->time_base = time_base;
103 1 av_log(outlink->src, AV_LOG_VERBOSE, "tb:%d/%d -> tb:%d/%d\n",
104 inlink ->time_base.num, inlink ->time_base.den,
105 outlink->time_base.num, outlink->time_base.den);
106
107 1 return 0;
108 }
109
110 51 static int64_t rescale_pts(AVFilterLink *inlink, AVFilterLink *outlink, int64_t orig_pts)
111 {
112 51 AVFilterContext *ctx = inlink->dst;
113 51 int64_t new_pts = orig_pts;
114
115
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51 if (av_cmp_q(inlink->time_base, outlink->time_base)) {
116 51 new_pts = av_rescale_q(orig_pts, inlink->time_base, outlink->time_base);
117 51 av_log(ctx, AV_LOG_DEBUG, "tb:%d/%d pts:%"PRId64" -> tb:%d/%d pts:%"PRId64"\n",
118 inlink ->time_base.num, inlink ->time_base.den, orig_pts,
119 outlink->time_base.num, outlink->time_base.den, new_pts);
120 }
121
122 51 return new_pts;
123 }
124
125 50 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
126 {
127 50 AVFilterContext *ctx = inlink->dst;
128 50 AVFilterLink *outlink = ctx->outputs[0];
129
130 50 frame->pts = rescale_pts(inlink, outlink, frame->pts);
131 50 frame->duration = av_rescale_q(frame->duration, inlink->time_base, outlink->time_base);
132
133 50 return ff_filter_frame(outlink, frame);
134 }
135
136 101 static int activate(AVFilterContext *ctx)
137 {
138 101 AVFilterLink *inlink = ctx->inputs[0];
139 101 AVFilterLink *outlink = ctx->outputs[0];
140 AVFrame *in;
141 int status;
142 int64_t pts;
143 int ret;
144
145
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101 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
146
147 101 ret = ff_inlink_consume_frame(inlink, &in);
148
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101 if (ret < 0)
149 return ret;
150
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101 if (ret > 0)
151 50 return filter_frame(inlink, in);
152
153
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51 if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
154 1 ff_outlink_set_status(outlink, status, rescale_pts(inlink, outlink, pts));
155 1 return 0;
156 }
157
158
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50 FF_FILTER_FORWARD_WANTED(outlink, inlink);
159
160 return FFERROR_NOT_READY;
161 }
162
163 #if CONFIG_SETTB_FILTER
164
165 DEFINE_OPTIONS(settb, VIDEO);
166 AVFILTER_DEFINE_CLASS(settb);
167
168 static const AVFilterPad avfilter_vf_settb_inputs[] = {
169 {
170 .name = "default",
171 .type = AVMEDIA_TYPE_VIDEO,
172 },
173 };
174
175 static const AVFilterPad avfilter_vf_settb_outputs[] = {
176 {
177 .name = "default",
178 .type = AVMEDIA_TYPE_VIDEO,
179 .config_props = config_output_props,
180 },
181 };
182
183 const AVFilter ff_vf_settb = {
184 .name = "settb",
185 .description = NULL_IF_CONFIG_SMALL("Set timebase for the video output link."),
186 .priv_size = sizeof(SetTBContext),
187 .priv_class = &settb_class,
188 FILTER_INPUTS(avfilter_vf_settb_inputs),
189 FILTER_OUTPUTS(avfilter_vf_settb_outputs),
190 .activate = activate,
191 .flags = AVFILTER_FLAG_METADATA_ONLY,
192 };
193 #endif /* CONFIG_SETTB_FILTER */
194
195 #if CONFIG_ASETTB_FILTER
196
197 DEFINE_OPTIONS(asettb, AUDIO);
198 AVFILTER_DEFINE_CLASS(asettb);
199
200 static const AVFilterPad avfilter_af_asettb_inputs[] = {
201 {
202 .name = "default",
203 .type = AVMEDIA_TYPE_AUDIO,
204 },
205 };
206
207 static const AVFilterPad avfilter_af_asettb_outputs[] = {
208 {
209 .name = "default",
210 .type = AVMEDIA_TYPE_AUDIO,
211 .config_props = config_output_props,
212 },
213 };
214
215 const AVFilter ff_af_asettb = {
216 .name = "asettb",
217 .description = NULL_IF_CONFIG_SMALL("Set timebase for the audio output link."),
218 .priv_size = sizeof(SetTBContext),
219 FILTER_INPUTS(avfilter_af_asettb_inputs),
220 FILTER_OUTPUTS(avfilter_af_asettb_outputs),
221 .priv_class = &asettb_class,
222 .activate = activate,
223 .flags = AVFILTER_FLAG_METADATA_ONLY,
224 };
225 #endif /* CONFIG_ASETTB_FILTER */
226