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
|
/*
* Copyright (c) 2012 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* set field order
*/
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
enum SetFieldMode {
MODE_AUTO = -1,
MODE_BFF,
MODE_TFF,
MODE_PROG,
};
typedef struct {
const AVClass *class;
enum SetFieldMode mode;
} SetFieldContext;
#define OFFSET(x) offsetof(SetFieldContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption setfield_options[] = {
{"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_AUTO}, -1, MODE_PROG, FLAGS, "mode"},
{"auto", "keep the same input field", 0, AV_OPT_TYPE_CONST, {.i64=MODE_AUTO}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"bff", "mark as bottom-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_BFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"tff", "mark as top-field-first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_TFF}, INT_MIN, INT_MAX, FLAGS, "mode"},
{"prog", "mark as progressive", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PROG}, INT_MIN, INT_MAX, FLAGS, "mode"},
{NULL}
};
AVFILTER_DEFINE_CLASS(setfield);
static av_cold int init(AVFilterContext *ctx, const char *args)
{
SetFieldContext *setfield = ctx->priv;
static const char *shorthand[] = { "mode", NULL };
setfield->class = &setfield_class;
av_opt_set_defaults(setfield);
return av_opt_set_from_string(setfield, args, shorthand, "=", ":");
}
static av_cold void uninit(AVFilterContext *ctx)
{
SetFieldContext *setfield = ctx->priv;
av_opt_free(setfield);
}
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
{
SetFieldContext *setfield = inlink->dst->priv;
if (setfield->mode == MODE_PROG) {
picref->interlaced_frame = 0;
} else if (setfield->mode != MODE_AUTO) {
picref->interlaced_frame = 1;
picref->top_field_first = setfield->mode;
}
return ff_filter_frame(inlink->dst->outputs[0], picref);
}
static const AVFilterPad setfield_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad setfield_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter avfilter_vf_setfield = {
.name = "setfield",
.description = NULL_IF_CONFIG_SMALL("Force field for the output video frame."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(SetFieldContext),
.inputs = setfield_inputs,
.outputs = setfield_outputs,
.priv_class = &setfield_class,
};
|
