1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Copyright (c) 2007 Bobby Bingham
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* format and noformat video filters
*/
#include <string.h>
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct {
/**
* List of flags telling if a given image format has been listed
* as argument to the filter.
*/
int listed_pix_fmt_flags[AV_PIX_FMT_NB];
} FormatContext;
#define AV_PIX_FMT_NAME_MAXSIZE 32
static av_cold int init(AVFilterContext *ctx, const char *args)
{
FormatContext *format = ctx->priv;
const char *cur, *sep;
char pix_fmt_name[AV_PIX_FMT_NAME_MAXSIZE];
int pix_fmt_name_len;
enum AVPixelFormat pix_fmt;
/* parse the list of formats */
for (cur = args; cur; cur = sep ? sep+1 : NULL) {
if (!(sep = strchr(cur, ':')))
pix_fmt_name_len = strlen(cur);
else
pix_fmt_name_len = sep - cur;
if (pix_fmt_name_len >= AV_PIX_FMT_NAME_MAXSIZE) {
av_log(ctx, AV_LOG_ERROR, "Format name too long\n");
return -1;
}
memcpy(pix_fmt_name, cur, pix_fmt_name_len);
pix_fmt_name[pix_fmt_name_len] = 0;
pix_fmt = av_get_pix_fmt(pix_fmt_name);
if (pix_fmt == AV_PIX_FMT_NONE) {
av_log(ctx, AV_LOG_ERROR, "Unknown pixel format: %s\n", pix_fmt_name);
return -1;
}
format->listed_pix_fmt_flags[pix_fmt] = 1;
}
return 0;
}
static AVFilterFormats *make_format_list(FormatContext *format, int flag)
{
AVFilterFormats *formats;
enum AVPixelFormat pix_fmt;
formats = av_mallocz(sizeof(AVFilterFormats));
formats->formats = av_malloc(sizeof(enum AVPixelFormat) * AV_PIX_FMT_NB);
for (pix_fmt = 0; pix_fmt < AV_PIX_FMT_NB; pix_fmt++)
if (format->listed_pix_fmt_flags[pix_fmt] == flag)
formats->formats[formats->format_count++] = pix_fmt;
return formats;
}
#if CONFIG_FORMAT_FILTER
static int query_formats_format(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, make_format_list(ctx->priv, 1));
return 0;
}
static const AVFilterPad avfilter_vf_format_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_format_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter avfilter_vf_format = {
.name = "format",
.description = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
.init = init,
.query_formats = query_formats_format,
.priv_size = sizeof(FormatContext),
.inputs = avfilter_vf_format_inputs,
.outputs = avfilter_vf_format_outputs,
};
#endif /* CONFIG_FORMAT_FILTER */
#if CONFIG_NOFORMAT_FILTER
static int query_formats_noformat(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, make_format_list(ctx->priv, 0));
return 0;
}
static const AVFilterPad avfilter_vf_noformat_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_noformat_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter avfilter_vf_noformat = {
.name = "noformat",
.description = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
.init = init,
.query_formats = query_formats_noformat,
.priv_size = sizeof(FormatContext),
.inputs = avfilter_vf_noformat_inputs,
.outputs = avfilter_vf_noformat_outputs,
};
#endif /* CONFIG_NOFORMAT_FILTER */
|
