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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2013 Paul B Mahol
*
* 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
* (de)interleave fields filter
*/
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
enum FilterMode {
MODE_NONE,
MODE_INTERLEAVE,
MODE_DEINTERLEAVE
};
typedef struct {
const AVClass *class;
enum FilterMode luma_mode, chroma_mode, alpha_mode;
int luma_swap, chroma_swap, alpha_swap;
int nb_planes;
int linesize[4], chroma_height;
int has_alpha;
} IlContext;
#define OFFSET(x) offsetof(IlContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption il_options[] = {
{"luma_mode", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
{"l", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "luma_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"chroma_mode", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
{"c", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "chroma_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"alpha_mode", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
{"a", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "alpha_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{NULL}
};
AVFILTER_DEFINE_CLASS(il);
static av_cold int init(AVFilterContext *ctx, const char *args)
{
IlContext *il = ctx->priv;
int ret;
il->class = &il_class;
av_opt_set_defaults(il);
if ((ret = av_set_options_string(il, args, "=", ":")) < 0)
return ret;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
int fmt;
for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (!(desc->flags & PIX_FMT_PAL))
ff_add_format(&formats, fmt);
}
ff_set_common_formats(ctx, formats);
return 0;
}
static int config_input(AVFilterLink *inlink)
{
IlContext *il = inlink->dst->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int i, ret;
for (i = 0; i < desc->nb_components; i++)
il->nb_planes = FFMAX(il->nb_planes, desc->comp[i].plane);
il->nb_planes++;
il->has_alpha = !!(desc->flags & PIX_FMT_ALPHA);
if ((ret = av_image_fill_linesizes(il->linesize, inlink->format, inlink->w)) < 0)
return ret;
il->chroma_height = inlink->h >> desc->log2_chroma_h;
return 0;
}
static void interleave(uint8_t *dst, uint8_t *src, int w, int h,
int dst_linesize, int src_linesize,
enum FilterMode mode, int swap)
{
const int a = swap;
const int b = 1 - a;
const int m = h >> 1;
int y;
switch (mode) {
case MODE_DEINTERLEAVE:
for (y = 0; y < m; y++) {
memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w);
memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w);
}
break;
case MODE_NONE:
for (y = 0; y < m; y++) {
memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w);
memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w);
}
break;
case MODE_INTERLEAVE:
for (y = 0; y < m; y++) {
memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w);
memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w);
}
break;
}
}
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
IlContext *il = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFilterBufferRef *out;
int ret, comp;
out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
if (!out) {
avfilter_unref_bufferp(&inpicref);
return AVERROR(ENOMEM);
}
avfilter_copy_buffer_ref_props(out, inpicref);
interleave(out->data[0], inpicref->data[0],
il->linesize[0], inlink->h,
out->linesize[0], inpicref->linesize[0],
il->luma_mode, il->luma_swap);
for (comp = 1; comp < (il->nb_planes - il->has_alpha); comp++) {
interleave(out->data[comp], inpicref->data[comp],
il->linesize[comp], il->chroma_height,
out->linesize[comp], inpicref->linesize[comp],
il->chroma_mode, il->chroma_swap);
}
if (il->has_alpha) {
int comp = il->nb_planes - 1;
interleave(out->data[comp], inpicref->data[comp],
il->linesize[comp], inlink->h,
out->linesize[comp], inpicref->linesize[comp],
il->alpha_mode, il->alpha_swap);
}
ret = ff_filter_frame(outlink, out);
avfilter_unref_bufferp(&inpicref);
return ret;
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter avfilter_vf_il = {
.name = "il",
.description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."),
.priv_size = sizeof(IlContext),
.init = init,
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.priv_class = &il_class,
};
|