2 * Copyright (c) 2007 Bobby Bingham
4 * This file is part of FFmpeg.
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.
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.
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
23 * format and noformat video filters
28 #include "libavutil/internal.h"
29 #include "libavutil/mem.h"
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/opt.h"
38 typedef struct FormatContext {
43 * pix_fmts parsed into AVPixelFormats and terminated with
46 enum AVPixelFormat *formats;
49 static av_cold void uninit(AVFilterContext *ctx)
51 FormatContext *s = ctx->priv;
52 av_freep(&s->formats);
55 static av_cold int init(AVFilterContext *ctx)
57 FormatContext *s = ctx->priv;
64 av_log(ctx, AV_LOG_ERROR, "Empty output format string.\n");
65 return AVERROR(EINVAL);
68 /* count the formats */
70 while ((cur = strchr(cur, '|'))) {
76 s->formats = av_malloc_array(nb_formats + 1, sizeof(*s->formats));
78 return AVERROR(ENOMEM);
80 /* parse the list of formats */
82 for (i = 0; i < nb_formats; i++) {
83 sep = strchr(cur, '|');
87 if ((ret = ff_parse_pixel_format(&s->formats[i], cur, ctx)) < 0)
92 s->formats[nb_formats] = AV_PIX_FMT_NONE;
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;
99 /* count the formats known to lavu */
100 while ((desc = av_pix_fmt_desc_next(desc)))
103 formats_allowed = av_malloc_array(nb_formats_lavu + 1, sizeof(*formats_allowed));
104 if (!formats_allowed)
105 return AVERROR(ENOMEM);
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);
112 for (i = 0; i < nb_formats; i++) {
113 if (s->formats[i] == pix_fmt)
119 formats_allowed[nb_formats_allowed++] = pix_fmt;
121 formats_allowed[nb_formats_allowed] = AV_PIX_FMT_NONE;
122 av_freep(&s->formats);
123 s->formats = formats_allowed;
129 static int query_formats(AVFilterContext *ctx)
131 FormatContext *s = ctx->priv;
132 AVFilterFormats *formats = ff_make_format_list(s->formats);
135 return AVERROR(ENOMEM);
137 return ff_set_common_formats(ctx, formats);
141 #define OFFSET(x) offsetof(FormatContext, x)
142 static const AVOption options[] = {
143 { "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 },
147 #if CONFIG_FORMAT_FILTER
149 #define format_options options
150 AVFILTER_DEFINE_CLASS(format);
152 static const AVFilterPad avfilter_vf_format_inputs[] = {
155 .type = AVMEDIA_TYPE_VIDEO,
156 .get_video_buffer = ff_null_get_video_buffer,
161 static const AVFilterPad avfilter_vf_format_outputs[] = {
164 .type = AVMEDIA_TYPE_VIDEO
169 const AVFilter ff_vf_format = {
171 .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
176 .query_formats = query_formats,
178 .priv_size = sizeof(FormatContext),
179 .priv_class = &format_class,
181 .inputs = avfilter_vf_format_inputs,
182 .outputs = avfilter_vf_format_outputs,
184 #endif /* CONFIG_FORMAT_FILTER */
186 #if CONFIG_NOFORMAT_FILTER
188 #define noformat_options options
189 AVFILTER_DEFINE_CLASS(noformat);
191 static const AVFilterPad avfilter_vf_noformat_inputs[] = {
194 .type = AVMEDIA_TYPE_VIDEO,
195 .get_video_buffer = ff_null_get_video_buffer,
200 static const AVFilterPad avfilter_vf_noformat_outputs[] = {
203 .type = AVMEDIA_TYPE_VIDEO
208 const AVFilter ff_vf_noformat = {
210 .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
215 .query_formats = query_formats,
217 .priv_size = sizeof(FormatContext),
218 .priv_class = &noformat_class,
220 .inputs = avfilter_vf_noformat_inputs,
221 .outputs = avfilter_vf_noformat_outputs,
223 #endif /* CONFIG_NOFORMAT_FILTER */