FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_format.c
Date: 2024-04-19 07:31:02
Exec Total Coverage
Lines: 27 63 42.9%
Functions: 3 4 75.0%
Branches: 18 72 25.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2007 Bobby Bingham
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 * format and noformat video filters
24 */
25
26 #include "config_components.h"
27
28 #include <string.h>
29
30 #include "libavutil/internal.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/opt.h"
34
35 #include "avfilter.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "video.h"
39
40 typedef struct FormatContext {
41 const AVClass *class;
42 char *pix_fmts;
43 char *csps;
44 char *ranges;
45
46 AVFilterFormats *formats; ///< parsed from `pix_fmts`
47 AVFilterFormats *color_spaces; ///< parsed from `csps`
48 AVFilterFormats *color_ranges; ///< parsed from `ranges`
49 } FormatContext;
50
51 8937 static av_cold void uninit(AVFilterContext *ctx)
52 {
53 8937 FormatContext *s = ctx->priv;
54 8937 ff_formats_unref(&s->formats);
55 8937 ff_formats_unref(&s->color_spaces);
56 8937 ff_formats_unref(&s->color_ranges);
57 8937 }
58
59 static av_cold int invert_formats(AVFilterFormats **fmts,
60 AVFilterFormats *allfmts)
61 {
62 if (!allfmts)
63 return AVERROR(ENOMEM);
64 if (!*fmts) {
65 /* empty fmt list means no restriction, regardless of filter type */
66 ff_formats_unref(&allfmts);
67 return 0;
68 }
69
70 for (int i = 0; i < allfmts->nb_formats; i++) {
71 for (int j = 0; j < (*fmts)->nb_formats; j++) {
72 if (allfmts->formats[i] == (*fmts)->formats[j]) {
73 /* format is forbidden, remove it from allfmts list */
74 memmove(&allfmts->formats[i], &allfmts->formats[i+1],
75 (allfmts->nb_formats - (i+1)) * sizeof(*allfmts->formats));
76 allfmts->nb_formats--;
77 i--; /* repeat loop with same idx */
78 break;
79 }
80 }
81 }
82
83 ff_formats_unref(fmts);
84 *fmts = allfmts;
85 return 0;
86 }
87
88 8937 static av_cold int init(AVFilterContext *ctx)
89 {
90 8937 FormatContext *s = ctx->priv;
91 enum AVPixelFormat pix_fmt;
92 int ret;
93
94
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19455 for (char *sep, *cur = s->pix_fmts; cur; cur = sep) {
95 10518 sep = strchr(cur, '|');
96
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10518 if (sep && *sep)
97 1581 *sep++ = 0;
98
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21036 if ((ret = ff_parse_pixel_format(&pix_fmt, cur, ctx)) < 0 ||
99 10518 (ret = ff_add_format(&s->formats, pix_fmt)) < 0)
100 return ret;
101 }
102
103
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8937 for (char *sep, *cur = s->csps; cur; cur = sep) {
104 sep = strchr(cur, '|');
105 if (sep && *sep)
106 *sep++ = 0;
107 if ((ret = av_color_space_from_name(cur)) < 0 ||
108 (ret = ff_add_format(&s->color_spaces, ret)) < 0)
109 return ret;
110 }
111
112
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8937 for (char *sep, *cur = s->ranges; cur; cur = sep) {
113 sep = strchr(cur, '|');
114 if (sep && *sep)
115 *sep++ = 0;
116 if ((ret = av_color_range_from_name(cur)) < 0 ||
117 (ret = ff_add_format(&s->color_ranges, ret)) < 0)
118 return ret;
119 }
120
121
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8937 if (!strcmp(ctx->filter->name, "noformat")) {
122 if ((ret = invert_formats(&s->formats, ff_all_formats(AVMEDIA_TYPE_VIDEO))) < 0 ||
123 (ret = invert_formats(&s->color_spaces, ff_all_color_spaces())) < 0 ||
124 (ret = invert_formats(&s->color_ranges, ff_all_color_ranges())) < 0)
125 return ret;
126 }
127
128 /* hold on to a ref for the lifetime of the filter */
129
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8937 if (s->formats && (ret = ff_formats_ref(s->formats, &s->formats)) < 0 ||
130
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8937 s->color_spaces && (ret = ff_formats_ref(s->color_spaces, &s->color_spaces)) < 0 ||
131
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8937 s->color_ranges && (ret = ff_formats_ref(s->color_ranges, &s->color_ranges)) < 0)
132 return ret;
133
134 8937 return 0;
135 }
136
137 6536 static int query_formats(AVFilterContext *ctx)
138 {
139 6536 FormatContext *s = ctx->priv;
140 int ret;
141
142
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6536 if (s->formats && (ret = ff_set_common_formats(ctx, s->formats)) < 0 ||
143
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6536 s->color_spaces && (ret = ff_set_common_color_spaces(ctx, s->color_spaces)) < 0 ||
144
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6536 s->color_ranges && (ret = ff_set_common_color_ranges(ctx, s->color_ranges)) < 0)
145 return ret;
146
147 6536 return 0;
148 }
149
150
151 #define OFFSET(x) offsetof(FormatContext, x)
152 static const AVOption options[] = {
153 { "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
154 { "color_spaces", "A '|'-separated list of color spaces", OFFSET(csps), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
155 { "color_ranges", "A '|'-separated list of color ranges", OFFSET(ranges), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
156 { NULL }
157 };
158
159 AVFILTER_DEFINE_CLASS_EXT(format, "(no)format", options);
160
161 static const AVFilterPad inputs[] = {
162 {
163 .name = "default",
164 .type = AVMEDIA_TYPE_VIDEO,
165 .get_buffer.video = ff_null_get_video_buffer,
166 },
167 };
168
169 #if CONFIG_FORMAT_FILTER
170 const AVFilter ff_vf_format = {
171 .name = "format",
172 .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
173
174 .init = init,
175 .uninit = uninit,
176
177 .priv_size = sizeof(FormatContext),
178 .priv_class = &format_class,
179
180 .flags = AVFILTER_FLAG_METADATA_ONLY,
181
182 FILTER_INPUTS(inputs),
183 FILTER_OUTPUTS(ff_video_default_filterpad),
184
185 FILTER_QUERY_FUNC(query_formats),
186 };
187 #endif /* CONFIG_FORMAT_FILTER */
188
189 #if CONFIG_NOFORMAT_FILTER
190 const AVFilter ff_vf_noformat = {
191 .name = "noformat",
192 .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
193 .priv_class = &format_class,
194
195 .init = init,
196 .uninit = uninit,
197
198 .priv_size = sizeof(FormatContext),
199
200 .flags = AVFILTER_FLAG_METADATA_ONLY,
201
202 FILTER_INPUTS(inputs),
203 FILTER_OUTPUTS(ff_video_default_filterpad),
204
205 FILTER_QUERY_FUNC(query_formats),
206 };
207 #endif /* CONFIG_NOFORMAT_FILTER */
208