Add log_level_offset to AVCodecContext.
[libav.git] / libavfilter / vf_format.c
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 "libavutil/pixdesc.h"
27 #include "avfilter.h"
28
29 typedef struct {
30 /**
31 * List of flags telling if a given image format has been listed
32 * as argument to the filter.
33 */
34 int listed_pix_fmt_flags[PIX_FMT_NB];
35 } FormatContext;
36
37 #define PIX_FMT_NAME_MAXSIZE 32
38
39 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
40 {
41 FormatContext *format = ctx->priv;
42 const char *cur, *sep;
43 char pix_fmt_name[PIX_FMT_NAME_MAXSIZE];
44 int pix_fmt_name_len;
45 enum PixelFormat pix_fmt;
46
47 /* parse the list of formats */
48 for (cur = args; cur; cur = sep ? sep+1 : NULL) {
49 if (!(sep = strchr(cur, ':')))
50 pix_fmt_name_len = strlen(cur);
51 else
52 pix_fmt_name_len = sep - cur;
53 if (pix_fmt_name_len >= PIX_FMT_NAME_MAXSIZE) {
54 av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
55 return -1;
56 }
57
58 memcpy(pix_fmt_name, cur, pix_fmt_name_len);
59 pix_fmt_name[pix_fmt_name_len] = 0;
60 pix_fmt = av_get_pix_fmt(pix_fmt_name);
61
62 if (pix_fmt == PIX_FMT_NONE) {
63 av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name);
64 return -1;
65 }
66
67 format->listed_pix_fmt_flags[pix_fmt] = 1;
68 }
69
70 return 0;
71 }
72
73 static AVFilterFormats *make_format_list(FormatContext *format, int flag)
74 {
75 AVFilterFormats *formats;
76 enum PixelFormat pix_fmt;
77
78 formats = av_mallocz(sizeof(AVFilterFormats));
79 formats->formats = av_malloc(sizeof(enum PixelFormat) * PIX_FMT_NB);
80
81 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
82 if (format->listed_pix_fmt_flags[pix_fmt] == flag)
83 formats->formats[formats->format_count++] = pix_fmt;
84
85 return formats;
86 }
87
88 #if CONFIG_FORMAT_FILTER
89 static int query_formats_format(AVFilterContext *ctx)
90 {
91 avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 1));
92 return 0;
93 }
94
95 AVFilter avfilter_vf_format = {
96 .name = "format",
97 .description = "Convert the input video to one of the specified pixel formats.",
98
99 .init = init,
100
101 .query_formats = query_formats_format,
102
103 .priv_size = sizeof(FormatContext),
104
105 .inputs = (AVFilterPad[]) {{ .name = "default",
106 .type = AVMEDIA_TYPE_VIDEO,
107 .get_video_buffer= avfilter_null_get_video_buffer,
108 .start_frame = avfilter_null_start_frame,
109 .draw_slice = avfilter_null_draw_slice,
110 .end_frame = avfilter_null_end_frame, },
111 { .name = NULL}},
112 .outputs = (AVFilterPad[]) {{ .name = "default",
113 .type = AVMEDIA_TYPE_VIDEO },
114 { .name = NULL}},
115 };
116 #endif /* CONFIG_FORMAT_FILTER */
117
118 #if CONFIG_NOFORMAT_FILTER
119 static int query_formats_noformat(AVFilterContext *ctx)
120 {
121 avfilter_set_common_formats(ctx, make_format_list(ctx->priv, 0));
122 return 0;
123 }
124
125 AVFilter avfilter_vf_noformat = {
126 .name = "noformat",
127 .description = "Force libavfilter not to use any of the specified pixel formats for the input to the next filter.",
128
129 .init = init,
130
131 .query_formats = query_formats_noformat,
132
133 .priv_size = sizeof(FormatContext),
134
135 .inputs = (AVFilterPad[]) {{ .name = "default",
136 .type = AVMEDIA_TYPE_VIDEO,
137 .get_video_buffer= avfilter_null_get_video_buffer,
138 .start_frame = avfilter_null_start_frame,
139 .draw_slice = avfilter_null_draw_slice,
140 .end_frame = avfilter_null_end_frame, },
141 { .name = NULL}},
142 .outputs = (AVFilterPad[]) {{ .name = "default",
143 .type = AVMEDIA_TYPE_VIDEO },
144 { .name = NULL}},
145 };
146 #endif /* CONFIG_NOFORMAT_FILTER */
147