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2ba45a60 DM |
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 <string.h> | |
27 | ||
28 | #include "libavutil/internal.h" | |
29 | #include "libavutil/mem.h" | |
30 | #include "libavutil/pixdesc.h" | |
31 | #include "libavutil/opt.h" | |
32 | ||
33 | #include "avfilter.h" | |
34 | #include "formats.h" | |
35 | #include "internal.h" | |
36 | #include "video.h" | |
37 | ||
38 | typedef struct FormatContext { | |
39 | const AVClass *class; | |
40 | char *pix_fmts; | |
41 | ||
42 | /** | |
43 | * pix_fmts parsed into AVPixelFormats and terminated with | |
44 | * AV_PIX_FMT_NONE | |
45 | */ | |
46 | enum AVPixelFormat *formats; | |
47 | } FormatContext; | |
48 | ||
49 | static av_cold void uninit(AVFilterContext *ctx) | |
50 | { | |
51 | FormatContext *s = ctx->priv; | |
52 | av_freep(&s->formats); | |
53 | } | |
54 | ||
55 | static av_cold int init(AVFilterContext *ctx) | |
56 | { | |
57 | FormatContext *s = ctx->priv; | |
58 | char *cur, *sep; | |
59 | int nb_formats = 1; | |
60 | int i; | |
61 | int ret; | |
62 | ||
f6fa7814 DM |
63 | if (!s->pix_fmts) { |
64 | av_log(ctx, AV_LOG_ERROR, "Empty output format string.\n"); | |
2ba45a60 | 65 | return AVERROR(EINVAL); |
f6fa7814 | 66 | } |
2ba45a60 DM |
67 | |
68 | /* count the formats */ | |
69 | cur = s->pix_fmts; | |
70 | while ((cur = strchr(cur, '|'))) { | |
71 | nb_formats++; | |
72 | if (*cur) | |
73 | cur++; | |
74 | } | |
75 | ||
76 | s->formats = av_malloc_array(nb_formats + 1, sizeof(*s->formats)); | |
77 | if (!s->formats) | |
78 | return AVERROR(ENOMEM); | |
79 | ||
80 | /* parse the list of formats */ | |
81 | cur = s->pix_fmts; | |
82 | for (i = 0; i < nb_formats; i++) { | |
83 | sep = strchr(cur, '|'); | |
84 | if (sep) | |
85 | *sep++ = 0; | |
86 | ||
87 | if ((ret = ff_parse_pixel_format(&s->formats[i], cur, ctx)) < 0) | |
88 | return ret; | |
89 | ||
90 | cur = sep; | |
91 | } | |
92 | s->formats[nb_formats] = AV_PIX_FMT_NONE; | |
93 | ||
94 | if (!strcmp(ctx->filter->name, "noformat")) { | |
95 | const AVPixFmtDescriptor *desc = NULL; | |
96 | enum AVPixelFormat *formats_allowed; | |
97 | int nb_formats_lavu = 0, nb_formats_allowed = 0; | |
98 | ||
99 | /* count the formats known to lavu */ | |
100 | while ((desc = av_pix_fmt_desc_next(desc))) | |
101 | nb_formats_lavu++; | |
102 | ||
103 | formats_allowed = av_malloc_array(nb_formats_lavu + 1, sizeof(*formats_allowed)); | |
104 | if (!formats_allowed) | |
105 | return AVERROR(ENOMEM); | |
106 | ||
107 | /* for each format known to lavu, check if it's in the list of | |
108 | * forbidden formats */ | |
109 | while ((desc = av_pix_fmt_desc_next(desc))) { | |
110 | enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(desc); | |
111 | ||
112 | for (i = 0; i < nb_formats; i++) { | |
113 | if (s->formats[i] == pix_fmt) | |
114 | break; | |
115 | } | |
116 | if (i < nb_formats) | |
117 | continue; | |
118 | ||
119 | formats_allowed[nb_formats_allowed++] = pix_fmt; | |
120 | } | |
121 | formats_allowed[nb_formats_allowed] = AV_PIX_FMT_NONE; | |
122 | av_freep(&s->formats); | |
123 | s->formats = formats_allowed; | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static int query_formats(AVFilterContext *ctx) | |
130 | { | |
131 | FormatContext *s = ctx->priv; | |
132 | AVFilterFormats *formats = ff_make_format_list(s->formats); | |
133 | ||
134 | if (!formats) | |
135 | return AVERROR(ENOMEM); | |
136 | ||
137 | ff_set_common_formats(ctx, formats); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | ||
142 | #define OFFSET(x) offsetof(FormatContext, x) | |
143 | static const AVOption options[] = { | |
144 | { "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM }, | |
145 | { NULL } | |
146 | }; | |
147 | ||
148 | #if CONFIG_FORMAT_FILTER | |
149 | ||
150 | #define format_options options | |
151 | AVFILTER_DEFINE_CLASS(format); | |
152 | ||
153 | static const AVFilterPad avfilter_vf_format_inputs[] = { | |
154 | { | |
155 | .name = "default", | |
156 | .type = AVMEDIA_TYPE_VIDEO, | |
157 | .get_video_buffer = ff_null_get_video_buffer, | |
158 | }, | |
159 | { NULL } | |
160 | }; | |
161 | ||
162 | static const AVFilterPad avfilter_vf_format_outputs[] = { | |
163 | { | |
164 | .name = "default", | |
165 | .type = AVMEDIA_TYPE_VIDEO | |
166 | }, | |
167 | { NULL } | |
168 | }; | |
169 | ||
170 | 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 | .query_formats = query_formats, | |
178 | ||
179 | .priv_size = sizeof(FormatContext), | |
180 | .priv_class = &format_class, | |
181 | ||
182 | .inputs = avfilter_vf_format_inputs, | |
183 | .outputs = avfilter_vf_format_outputs, | |
184 | }; | |
185 | #endif /* CONFIG_FORMAT_FILTER */ | |
186 | ||
187 | #if CONFIG_NOFORMAT_FILTER | |
188 | ||
189 | #define noformat_options options | |
190 | AVFILTER_DEFINE_CLASS(noformat); | |
191 | ||
192 | static const AVFilterPad avfilter_vf_noformat_inputs[] = { | |
193 | { | |
194 | .name = "default", | |
195 | .type = AVMEDIA_TYPE_VIDEO, | |
196 | .get_video_buffer = ff_null_get_video_buffer, | |
197 | }, | |
198 | { NULL } | |
199 | }; | |
200 | ||
201 | static const AVFilterPad avfilter_vf_noformat_outputs[] = { | |
202 | { | |
203 | .name = "default", | |
204 | .type = AVMEDIA_TYPE_VIDEO | |
205 | }, | |
206 | { NULL } | |
207 | }; | |
208 | ||
209 | AVFilter ff_vf_noformat = { | |
210 | .name = "noformat", | |
211 | .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."), | |
212 | ||
213 | .init = init, | |
214 | .uninit = uninit, | |
215 | ||
216 | .query_formats = query_formats, | |
217 | ||
218 | .priv_size = sizeof(FormatContext), | |
219 | .priv_class = &noformat_class, | |
220 | ||
221 | .inputs = avfilter_vf_noformat_inputs, | |
222 | .outputs = avfilter_vf_noformat_outputs, | |
223 | }; | |
224 | #endif /* CONFIG_NOFORMAT_FILTER */ |