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
|
/*
* Copyright (c) 2018 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/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "internal.h"
#include "formats.h"
#include "drawutils.h"
typedef struct TPadContext {
const AVClass *class;
int pad_start;
int pad_stop;
int start_mode;
int stop_mode;
int64_t start_duration;
int64_t stop_duration;
uint8_t rgba_color[4]; ///< color for the padding area
FFDrawContext draw;
FFDrawColor color;
int64_t pts;
int eof;
AVFrame *cache_start;
AVFrame *cache_stop;
} TPadContext;
#define OFFSET(x) offsetof(TPadContext, x)
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption tpad_options[] = {
{ "start", "set the number of frames to delay input", OFFSET(pad_start), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, VF },
{ "stop", "set the number of frames to add after input finished", OFFSET(pad_stop), AV_OPT_TYPE_INT, {.i64=0}, -1, INT_MAX, VF },
{ "start_mode", "set the mode of added frames to start", OFFSET(start_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "mode" },
{ "add", "add solid-color frames", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, VF, "mode" },
{ "clone", "clone first/last frame", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, VF, "mode" },
{ "stop_mode", "set the mode of added frames to end", OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "mode" },
{ "start_duration", "set the duration to delay input", OFFSET(start_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
{ "stop_duration", "set the duration to pad input", OFFSET(stop_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
{ "color", "set the color of the added frames", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="black"}, 0, 0, VF },
{ NULL }
};
AVFILTER_DEFINE_CLASS(tpad);
static int query_formats(AVFilterContext *ctx)
{
return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
TPadContext *s = ctx->priv;
AVFrame *frame = NULL;
int ret, status;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (s->start_mode == 0 && s->pad_start > 0 && ff_outlink_frame_wanted(outlink)) {
frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!frame)
return AVERROR(ENOMEM);
ff_fill_rectangle(&s->draw, &s->color,
frame->data, frame->linesize,
0, 0, frame->width, frame->height);
frame->pts = s->pts;
s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
s->pad_start--;
return ff_filter_frame(outlink, frame);
}
if (s->start_mode == 1 && s->pad_start > 0) {
if (!s->cache_start && ff_inlink_queued_frames(inlink)) {
s->cache_start = ff_inlink_peek_frame(inlink, 0);
} else if (!s->cache_start) {
FF_FILTER_FORWARD_WANTED(outlink, inlink);
}
frame = av_frame_clone(s->cache_start);
if (!frame)
return AVERROR(ENOMEM);
frame->pts = s->pts;
s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
s->pad_start--;
if (s->pad_start == 0)
s->cache_start = NULL;
return ff_filter_frame(outlink, frame);
}
if (!s->eof && !s->pad_start) {
ret = ff_inlink_consume_frame(inlink, &frame);
if (ret < 0)
return ret;
if (ret > 0) {
if (s->stop_mode == 1 && s->pad_stop != 0) {
av_frame_free(&s->cache_stop);
s->cache_stop = av_frame_clone(frame);
}
frame->pts += s->pts;
return ff_filter_frame(outlink, frame);
}
}
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF) {
pts = av_rescale_q(pts, inlink->time_base, outlink->time_base);
if (!s->pad_stop) {
ff_outlink_set_status(outlink, status, pts);
return 0;
}
s->eof = 1;
s->pts += pts;
}
}
if (s->eof) {
if (!s->pad_stop) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
return 0;
}
if (s->stop_mode == 0) {
frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!frame)
return AVERROR(ENOMEM);
ff_fill_rectangle(&s->draw, &s->color,
frame->data, frame->linesize,
0, 0, frame->width, frame->height);
} else if (s->stop_mode == 1) {
frame = av_frame_clone(s->cache_stop);
if (!frame)
return AVERROR(ENOMEM);
}
frame->pts = s->pts;
s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
if (s->pad_stop > 0)
s->pad_stop--;
return ff_filter_frame(outlink, frame);
}
if (!s->pad_start)
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
TPadContext *s = ctx->priv;
ff_draw_init(&s->draw, inlink->format, 0);
ff_draw_color(&s->draw, &s->color, s->rgba_color);
if (s->start_duration)
s->pad_start = av_rescale_q(s->start_duration, inlink->frame_rate, av_inv_q(AV_TIME_BASE_Q));
if (s->stop_duration)
s->pad_stop = av_rescale_q(s->stop_duration, inlink->frame_rate, av_inv_q(AV_TIME_BASE_Q));
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
TPadContext *s = ctx->priv;
av_frame_free(&s->cache_stop);
}
static const AVFilterPad tpad_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
};
static const AVFilterPad tpad_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_tpad = {
.name = "tpad",
.description = NULL_IF_CONFIG_SMALL("Temporarily pad video frames."),
.priv_size = sizeof(TPadContext),
.priv_class = &tpad_class,
.query_formats = query_formats,
.activate = activate,
.uninit = uninit,
FILTER_INPUTS(tpad_inputs),
FILTER_OUTPUTS(tpad_outputs),
};
|
