2 * Copyright (c) 2007 Bobby Bingham
4 * This file is part of Libav.
6 * Libav 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 * Libav 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 Libav; 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"
34 * List of flags telling if a given image format has been listed
35 * as argument to the filter.
37 int listed_pix_fmt_flags[PIX_FMT_NB];
40 #define PIX_FMT_NAME_MAXSIZE 32
42 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
44 FormatContext *format = ctx->priv;
45 const char *cur, *sep;
46 char pix_fmt_name[PIX_FMT_NAME_MAXSIZE];
48 enum PixelFormat pix_fmt;
50 /* parse the list of formats */
51 for (cur = args; cur; cur = sep ? sep+1 : NULL) {
52 if (!(sep = strchr(cur, ':')))
53 pix_fmt_name_len = strlen(cur);
55 pix_fmt_name_len = sep - cur;
56 if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) {
57 av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
61 memcpy(pix_fmt_name, cur, pix_fmt_name_len);
62 pix_fmt_name[pix_fmt_name_len] = 0;
63 pix_fmt = av_get_pix_fmt(pix_fmt_name);
65 if (pix_fmt == PIX_FMT_NONE) {
66 av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name);
70 format->listed_pix_fmt_flags[pix_fmt] = 1;
76 static AVFilterFormats *make_format_list(FormatContext *format, int flag)
78 AVFilterFormats *formats;
79 enum PixelFormat pix_fmt;
81 formats = av_mallocz(sizeof(AVFilterFormats));
82 formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
84 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
85 if (format->listed_pix_fmt_flags[pix_fmt] == flag)
86 formats->formats[formats->format_count++] = pix_fmt;
91 #if CONFIG_FORMAT_FILTER
92 static int query_formats_format(AVFilterContext *ctx)
94 ff_set_common_formats(ctx, make_format_list(ctx->priv, 1));
98 AVFilter avfilter_vf_format = {
100 .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
104 .query_formats = query_formats_format,
106 .priv_size = sizeof(FormatContext),
108 .inputs = (AVFilterPad[]) {{ .name = "default",
109 .type = AVMEDIA_TYPE_VIDEO,
110 .get_video_buffer= ff_null_get_video_buffer,
111 .start_frame = ff_null_start_frame,
112 .draw_slice = ff_null_draw_slice,
113 .end_frame = ff_null_end_frame, },
115 .outputs = (AVFilterPad[]) {{ .name = "default",
116 .type = AVMEDIA_TYPE_VIDEO },
119 #endif /* CONFIG_FORMAT_FILTER */
121 #if CONFIG_NOFORMAT_FILTER
122 static int query_formats_noformat(AVFilterContext *ctx)
124 ff_set_common_formats(ctx, make_format_list(ctx->priv, 0));
128 AVFilter avfilter_vf_noformat = {
130 .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
134 .query_formats = query_formats_noformat,
136 .priv_size = sizeof(FormatContext),
138 .inputs = (AVFilterPad[]) {{ .name = "default",
139 .type = AVMEDIA_TYPE_VIDEO,
140 .get_video_buffer= ff_null_get_video_buffer,
141 .start_frame = ff_null_start_frame,
142 .draw_slice = ff_null_draw_slice,
143 .end_frame = ff_null_end_frame, },
145 .outputs = (AVFilterPad[]) {{ .name = "default",
146 .type = AVMEDIA_TYPE_VIDEO },
149 #endif /* CONFIG_NOFORMAT_FILTER */