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
|
/*
* 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
*/
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
typedef struct WeaveContext {
const AVClass *class;
int first_field;
int double_weave;
int nb_planes;
int planeheight[4];
int linesize[4];
AVFrame *prev;
} WeaveContext;
#define OFFSET(x) offsetof(WeaveContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption weave_options[] = {
{ "first_field", "set first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "field"},
{ "top", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
{ "t", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
{ "bottom", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
{ "b", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
{ NULL }
};
AVFILTER_DEFINE_CLASS_EXT(weave, "(double)weave", weave_options);
static int query_formats(AVFilterContext *ctx)
{
int reject_flags = AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_HWACCEL;
return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags));
}
static int config_props_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
WeaveContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int ret;
if (!s->double_weave) {
outlink->time_base.num = inlink->time_base.num * 2;
outlink->time_base.den = inlink->time_base.den;
outlink->frame_rate.num = inlink->frame_rate.num;
outlink->frame_rate.den = inlink->frame_rate.den * 2;
}
outlink->w = inlink->w;
outlink->h = inlink->h * 2;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
return 0;
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int weave_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
AVFilterLink *inlink = ctx->inputs[0];
WeaveContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int weave = (s->double_weave && !(inlink->frame_count_out & 1));
const int field1 = weave ? s->first_field : (!s->first_field);
const int field2 = weave ? (!s->first_field) : s->first_field;
for (int i = 0; i < s->nb_planes; i++) {
const int height = s->planeheight[i];
const int start = (height * jobnr) / nb_jobs;
const int end = (height * (jobnr+1)) / nb_jobs;
av_image_copy_plane(out->data[i] + out->linesize[i] * field1 +
out->linesize[i] * start * 2,
out->linesize[i] * 2,
in->data[i] + start * in->linesize[i],
in->linesize[i],
s->linesize[i], end - start);
av_image_copy_plane(out->data[i] + out->linesize[i] * field2 +
out->linesize[i] * start * 2,
out->linesize[i] * 2,
s->prev->data[i] + start * s->prev->linesize[i],
s->prev->linesize[i],
s->linesize[i], end - start);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
WeaveContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
if (!s->prev) {
s->prev = in;
return 0;
}
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
av_frame_free(&s->prev);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
td.out = out, td.in = in;
ff_filter_execute(ctx, weave_slice, &td, NULL,
FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
out->pts = s->double_weave ? s->prev->pts : in->pts / 2;
out->interlaced_frame = 1;
out->top_field_first = !s->first_field;
if (!s->double_weave)
av_frame_free(&in);
av_frame_free(&s->prev);
if (s->double_weave)
s->prev = in;
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
WeaveContext *s = ctx->priv;
av_frame_free(&s->prev);
}
static const AVFilterPad weave_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
static const AVFilterPad weave_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props_output,
},
};
const AVFilter ff_vf_weave = {
.name = "weave",
.description = NULL_IF_CONFIG_SMALL("Weave input video fields into frames."),
.priv_size = sizeof(WeaveContext),
.priv_class = &weave_class,
.query_formats = query_formats,
.uninit = uninit,
FILTER_INPUTS(weave_inputs),
FILTER_OUTPUTS(weave_outputs),
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
static av_cold int init(AVFilterContext *ctx)
{
WeaveContext *s = ctx->priv;
if (!strcmp(ctx->filter->name, "doubleweave"))
s->double_weave = 1;
return 0;
}
const AVFilter ff_vf_doubleweave = {
.name = "doubleweave",
.description = NULL_IF_CONFIG_SMALL("Weave input video fields into double number of frames."),
.priv_class = &weave_class,
.priv_size = sizeof(WeaveContext),
.query_formats = query_formats,
.init = init,
.uninit = uninit,
FILTER_INPUTS(weave_inputs),
FILTER_OUTPUTS(weave_outputs),
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
|
