Statistics
| Branch: | Revision:

ffmpeg / libavfilter / vf_format.c @ a242ac36

History | View | Annotate | Download (4.97 KB)

1 fcbed3c7 Stefano Sabatini
/*
2 3fa77bde Stefano Sabatini
 * Copyright (c) 2007 Bobby Bingham
3 fcbed3c7 Stefano Sabatini
 *
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 ba87f080 Diego Biurrun
 * @file
23 dc264e77 Stefano Sabatini
 * format and noformat video filters
24 fcbed3c7 Stefano Sabatini
 */
25
26 718c7b18 Stefano Sabatini
#include "libavutil/pixdesc.h"
27 fcbed3c7 Stefano Sabatini
#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 718c7b18 Stefano Sabatini
        pix_fmt = av_get_pix_fmt(pix_fmt_name);
61 fcbed3c7 Stefano Sabatini
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 c0bc2fed Bobby Bingham
#if CONFIG_FORMAT_FILTER
89 55fd1bbc Bobby Bingham
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 fcbed3c7 Stefano Sabatini
AVFilter avfilter_vf_format = {
96
    .name      = "format",
97 a6881c6a Stefano Sabatini
    .description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
98 fcbed3c7 Stefano Sabatini
99
    .init      = init,
100
101
    .query_formats = query_formats_format,
102
103
    .priv_size = sizeof(FormatContext),
104
105
    .inputs    = (AVFilterPad[]) {{ .name            = "default",
106 72415b2a Stefano Sabatini
                                    .type            = AVMEDIA_TYPE_VIDEO,
107 d313e17a Bobby Bingham
                                    .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 fcbed3c7 Stefano Sabatini
                                  { .name = NULL}},
112
    .outputs   = (AVFilterPad[]) {{ .name            = "default",
113 72415b2a Stefano Sabatini
                                    .type            = AVMEDIA_TYPE_VIDEO },
114 fcbed3c7 Stefano Sabatini
                                  { .name = NULL}},
115
};
116 c0bc2fed Bobby Bingham
#endif /* CONFIG_FORMAT_FILTER */
117 fcbed3c7 Stefano Sabatini
118 c0bc2fed Bobby Bingham
#if CONFIG_NOFORMAT_FILTER
119 55fd1bbc Bobby Bingham
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 fcbed3c7 Stefano Sabatini
AVFilter avfilter_vf_noformat = {
126
    .name      = "noformat",
127 a6881c6a Stefano Sabatini
    .description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
128 fcbed3c7 Stefano Sabatini
129
    .init      = init,
130
131
    .query_formats = query_formats_noformat,
132
133
    .priv_size = sizeof(FormatContext),
134
135
    .inputs    = (AVFilterPad[]) {{ .name            = "default",
136 72415b2a Stefano Sabatini
                                    .type            = AVMEDIA_TYPE_VIDEO,
137 d313e17a Bobby Bingham
                                    .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 fcbed3c7 Stefano Sabatini
                                  { .name = NULL}},
142
    .outputs   = (AVFilterPad[]) {{ .name            = "default",
143 72415b2a Stefano Sabatini
                                    .type            = AVMEDIA_TYPE_VIDEO },
144 fcbed3c7 Stefano Sabatini
                                  { .name = NULL}},
145
};
146 c0bc2fed Bobby Bingham
#endif /* CONFIG_NOFORMAT_FILTER */