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
|
/*
* Copyright (c) 2011 Stefano Sabatini
* 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
* filter for showing textual video frame information
*/
#include "libavutil/adler32.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct {
unsigned int frame;
} ShowInfoContext;
static av_cold int init(AVFilterContext *ctx, const char *args)
{
ShowInfoContext *showinfo = ctx->priv;
showinfo->frame = 0;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
{
AVFilterContext *ctx = inlink->dst;
ShowInfoContext *showinfo = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
uint32_t plane_checksum[4] = {0}, checksum = 0;
int i, plane, vsub = desc->log2_chroma_h;
for (plane = 0; frame->data[plane] && plane < 4; plane++) {
size_t linesize = av_image_get_linesize(frame->format, frame->video->w, plane);
uint8_t *data = frame->data[plane];
int h = plane == 1 || plane == 2 ? inlink->h >> vsub : inlink->h;
for (i = 0; i < h; i++) {
plane_checksum[plane] = av_adler32_update(plane_checksum[plane], data, linesize);
checksum = av_adler32_update(checksum, data, linesize);
data += frame->linesize[plane];
}
}
av_log(ctx, AV_LOG_INFO,
"n:%d pts:%"PRId64" pts_time:%f pos:%"PRId64" "
"fmt:%s sar:%d/%d s:%dx%d i:%c iskey:%d type:%c "
"checksum:%u plane_checksum:[%u %u %u %u]\n",
showinfo->frame,
frame->pts, frame->pts * av_q2d(inlink->time_base), frame->pos,
desc->name,
frame->video->pixel_aspect.num, frame->video->pixel_aspect.den,
frame->video->w, frame->video->h,
!frame->video->interlaced ? 'P' : /* Progressive */
frame->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
frame->video->key_frame,
av_get_picture_type_char(frame->video->pict_type),
checksum, plane_checksum[0], plane_checksum[1], plane_checksum[2], plane_checksum[3]);
showinfo->frame++;
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
static const AVFilterPad avfilter_vf_showinfo_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
.min_perms = AV_PERM_READ,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_showinfo_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter avfilter_vf_showinfo = {
.name = "showinfo",
.description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
.priv_size = sizeof(ShowInfoContext),
.init = init,
.inputs = avfilter_vf_showinfo_inputs,
.outputs = avfilter_vf_showinfo_outputs,
};
|
