FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_separatefields.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 70 77 90.9%
Functions: 6 6 100.0%
Branches: 21 32 65.6%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2013 Paul B Mahol
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 #include "libavutil/pixdesc.h"
22 #include "avfilter.h"
23 #include "filters.h"
24 #include "internal.h"
25
26 typedef struct SeparateFieldsContext {
27 int nb_planes;
28 AVFrame *second;
29 } SeparateFieldsContext;
30
31 1 static int config_props_output(AVFilterLink *outlink)
32 {
33 1 AVFilterContext *ctx = outlink->src;
34 1 SeparateFieldsContext *s = ctx->priv;
35 1 AVFilterLink *inlink = ctx->inputs[0];
36
37 1 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
38
39
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1 if (inlink->h & 1) {
40 av_log(ctx, AV_LOG_ERROR, "height must be even\n");
41 return AVERROR_INVALIDDATA;
42 }
43
44 1 outlink->time_base.num = inlink->time_base.num;
45 1 outlink->time_base.den = inlink->time_base.den * 2;
46 1 outlink->frame_rate.num = inlink->frame_rate.num * 2;
47 1 outlink->frame_rate.den = inlink->frame_rate.den;
48 1 outlink->w = inlink->w;
49 1 outlink->h = inlink->h / 2;
50
51 1 return 0;
52 }
53
54 100 static void extract_field(AVFrame *frame, int nb_planes, int type)
55 {
56 int i;
57
58
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400 for (i = 0; i < nb_planes; i++) {
59
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300 if (type)
60 150 frame->data[i] = frame->data[i] + frame->linesize[i];
61 300 frame->linesize[i] *= 2;
62 }
63 100 }
64
65 50 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
66 {
67 50 AVFilterContext *ctx = inlink->dst;
68 50 SeparateFieldsContext *s = ctx->priv;
69 50 AVFilterLink *outlink = ctx->outputs[0];
70 int ret;
71
72 50 inpicref->height = outlink->h;
73 50 inpicref->interlaced_frame = 0;
74
75
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50 if (!s->second) {
76 1 goto clone;
77 } else {
78 49 AVFrame *second = s->second;
79
80 49 extract_field(second, s->nb_planes, second->top_field_first);
81
82
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49 if (second->pts != AV_NOPTS_VALUE &&
83
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49 inpicref->pts != AV_NOPTS_VALUE)
84 49 second->pts += inpicref->pts;
85 else
86 second->pts = AV_NOPTS_VALUE;
87
88 49 ret = ff_filter_frame(outlink, second);
89
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49 if (ret < 0)
90 return ret;
91 49 clone:
92 50 s->second = av_frame_clone(inpicref);
93
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50 if (!s->second)
94 return AVERROR(ENOMEM);
95 }
96
97 50 extract_field(inpicref, s->nb_planes, !inpicref->top_field_first);
98
99
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50 if (inpicref->pts != AV_NOPTS_VALUE)
100 50 inpicref->pts *= 2;
101
102 50 return ff_filter_frame(outlink, inpicref);
103 }
104
105 1 static int flush_frame(AVFilterLink *outlink, int64_t pts, int64_t *out_pts)
106 {
107 1 AVFilterContext *ctx = outlink->src;
108 1 SeparateFieldsContext *s = ctx->priv;
109 1 int ret = 0;
110
111
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1 if (s->second) {
112 1 *out_pts = s->second->pts += pts;
113 1 extract_field(s->second, s->nb_planes, s->second->top_field_first);
114 1 ret = ff_filter_frame(outlink, s->second);
115 1 s->second = NULL;
116 }
117
118 1 return ret;
119 }
120
121 101 static int activate(AVFilterContext *ctx)
122 {
123 101 AVFilterLink *inlink = ctx->inputs[0];
124 101 AVFilterLink *outlink = ctx->outputs[0];
125 AVFrame *in;
126 int64_t pts;
127 int ret, status;
128
129
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101 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
130
131 101 ret = ff_inlink_consume_frame(inlink, &in);
132
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101 if (ret < 0)
133 return ret;
134
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101 if (ret > 0)
135 50 return filter_frame(inlink, in);
136
137
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51 if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
138
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1 if (status == AVERROR_EOF) {
139 1 int64_t out_pts = pts;
140
141 1 ret = flush_frame(outlink, pts, &out_pts);
142 1 ff_outlink_set_status(outlink, status, out_pts);
143 1 return ret;
144 }
145 }
146
147
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50 FF_FILTER_FORWARD_WANTED(outlink, inlink);
148
149 return FFERROR_NOT_READY;
150 }
151
152 1 static av_cold void uninit(AVFilterContext *ctx)
153 {
154 1 SeparateFieldsContext *s = ctx->priv;
155
156 1 av_frame_free(&s->second);
157 1 }
158
159 static const AVFilterPad separatefields_inputs[] = {
160 {
161 .name = "default",
162 .type = AVMEDIA_TYPE_VIDEO,
163 },
164 };
165
166 static const AVFilterPad separatefields_outputs[] = {
167 {
168 .name = "default",
169 .type = AVMEDIA_TYPE_VIDEO,
170 .config_props = config_props_output,
171 },
172 };
173
174 const AVFilter ff_vf_separatefields = {
175 .name = "separatefields",
176 .description = NULL_IF_CONFIG_SMALL("Split input video frames into fields."),
177 .priv_size = sizeof(SeparateFieldsContext),
178 .activate = activate,
179 .uninit = uninit,
180 FILTER_INPUTS(separatefields_inputs),
181 FILTER_OUTPUTS(separatefields_outputs),
182 };
183