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
26 #include "libavutil/pixdesc.h"
32 * List of flags telling if a given image format has been listed
33 * as argument to the filter.
35 int listed_pix_fmt_flags[PIX_FMT_NB];
38 #define PIX_FMT_NAME_MAXSIZE 32
40 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
42 FormatContext *format = ctx->priv;
43 const char *cur, *sep;
44 char pix_fmt_name[PIX_FMT_NAME_MAXSIZE];
45 int pix_fmt_name_len, ret;
46 enum PixelFormat pix_fmt;
48 /* parse the list of formats */
49 for (cur = args; cur; cur = sep ? sep+1 : NULL) {
50 if (!(sep = strchr(cur, ':')))
51 pix_fmt_name_len = strlen(cur);
53 pix_fmt_name_len = sep - cur;
54 if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) {
55 av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
59 memcpy(pix_fmt_name, cur, pix_fmt_name_len);
60 pix_fmt_name[pix_fmt_name_len] = 0;
62 if ((ret = ff_parse_pixel_format(&pix_fmt, pix_fmt_name, ctx)) < 0)
65 format->listed_pix_fmt_flags[pix_fmt] = 1;
71 static AVFilterFormats *make_format_list(FormatContext *format, int flag)
73 AVFilterFormats *formats;
74 enum PixelFormat pix_fmt;
76 formats = av_mallocz(sizeof(AVFilterFormats));
77 formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
79 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
80 if (format->listed_pix_fmt_flags[pix_fmt] == flag)
81 formats->formats[formats->format_count++] = pix_fmt;
86 #if CONFIG_FORMAT_FILTER
87 static int query_formats_format(AVFilterContext *ctx)
89 avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 1));
93 AVFilter avfilter_vf_format = {
95 .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
99 .query_formats = query_formats_format,
101 .priv_size = sizeof(FormatContext),
103 .inputs = (AVFilterPad[]) {{ .name = "default",
104 .type = AVMEDIA_TYPE_VIDEO,
105 .get_video_buffer= avfilter_null_get_video_buffer,
106 .start_frame = avfilter_null_start_frame,
107 .draw_slice = avfilter_null_draw_slice,
108 .end_frame = avfilter_null_end_frame, },
110 .outputs = (AVFilterPad[]) {{ .name = "default",
111 .type = AVMEDIA_TYPE_VIDEO },
114 #endif /* CONFIG_FORMAT_FILTER */
116 #if CONFIG_NOFORMAT_FILTER
117 static int query_formats_noformat(AVFilterContext *ctx)
119 avfilter_set_common_pixel_formats(ctx, make_format_list(ctx->priv, 0));
123 AVFilter avfilter_vf_noformat = {
125 .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
129 .query_formats = query_formats_noformat,
131 .priv_size = sizeof(FormatContext),
133 .inputs = (AVFilterPad[]) {{ .name = "default",
134 .type = AVMEDIA_TYPE_VIDEO,
135 .get_video_buffer= avfilter_null_get_video_buffer,
136 .start_frame = avfilter_null_start_frame,
137 .draw_slice = avfilter_null_draw_slice,
138 .end_frame = avfilter_null_end_frame, },
140 .outputs = (AVFilterPad[]) {{ .name = "default",
141 .type = AVMEDIA_TYPE_VIDEO },
144 #endif /* CONFIG_NOFORMAT_FILTER */