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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
struct vf_priv_s {
int x1,y1,x2,y2;
int limit;
int round;
int fno;
};
static int checkline(unsigned char* src,int stride,int len,int bpp){
int total=0;
int div=len;
switch(bpp){
case 1:
while(--len>=0){
total+=src[0]; src+=stride;
}
break;
case 3:
case 4:
while(--len>=0){
total+=src[0]+src[1]+src[2]; src+=stride;
}
div*=3;
break;
}
total/=div;
// printf("total=%d\n",total);
return total;
}
//===========================================================================//
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
vf->priv->x1=width - 1;
vf->priv->y1=height - 1;
vf->priv->x2=0;
vf->priv->y2=0;
vf->priv->fno=0;
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
int bpp=mpi->bpp/8;
int w,h,x,y,shrink_by;
// hope we'll get DR buffer:
dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_EXPORT, 0,
mpi->w, mpi->h);
dmpi->planes[0]=mpi->planes[0];
dmpi->planes[1]=mpi->planes[1];
dmpi->planes[2]=mpi->planes[2];
dmpi->stride[0]=mpi->stride[0];
dmpi->stride[1]=mpi->stride[1];
dmpi->stride[2]=mpi->stride[2];
dmpi->width=mpi->width;
dmpi->height=mpi->height;
if(++vf->priv->fno>2){ // ignore first 2 frames - they may be empty
for(y=0;y<vf->priv->y1;y++){
if(checkline(mpi->planes[0]+mpi->stride[0]*y,bpp,mpi->w,bpp)>vf->priv->limit){
vf->priv->y1=y;
break;
}
}
for(y=mpi->h-1;y>vf->priv->y2;y--){
if(checkline(mpi->planes[0]+mpi->stride[0]*y,bpp,mpi->w,bpp)>vf->priv->limit){
vf->priv->y2=y;
break;
}
}
for(y=0;y<vf->priv->x1;y++){
if(checkline(mpi->planes[0]+bpp*y,mpi->stride[0],mpi->h,bpp)>vf->priv->limit){
vf->priv->x1=y;
break;
}
}
for(y=mpi->w-1;y>vf->priv->x2;y--){
if(checkline(mpi->planes[0]+bpp*y,mpi->stride[0],mpi->h,bpp)>vf->priv->limit){
vf->priv->x2=y;
break;
}
}
// round x and y (up), important for yuv colorspaces
// make sure they stay rounded!
x=(vf->priv->x1+1)&(~1);
y=(vf->priv->y1+1)&(~1);
w = vf->priv->x2 - x + 1;
h = vf->priv->y2 - y + 1;
// w and h must be divisible by 2 as well because of yuv
// colorspace problems.
if (vf->priv->round <= 1)
vf->priv->round = 16;
if (vf->priv->round % 2)
vf->priv->round *= 2;
shrink_by = w % vf->priv->round;
w -= shrink_by;
x += (shrink_by / 2 + 1) & ~1;
shrink_by = h % vf->priv->round;
h -= shrink_by;
y += (shrink_by / 2 + 1) & ~1;
mp_msg(MSGT_VFILTER, MSGL_INFO, MSGTR_MPCODECS_CropArea,
vf->priv->x1,vf->priv->x2,
vf->priv->y1,vf->priv->y2,
w,h,x,y);
}
return vf_next_put_image(vf,dmpi, pts);
}
static int query_format(struct vf_instance_s* vf, unsigned int fmt) {
switch(fmt) {
// the default limit value works only right with YV12 right now.
case IMGFMT_YV12:
return vf_next_query_format(vf, fmt);
}
return 0;
}
//===========================================================================//
static int open(vf_instance_t *vf, char* args){
vf->config=config;
vf->put_image=put_image;
vf->query_format=query_format;
vf->priv=malloc(sizeof(struct vf_priv_s));
vf->priv->limit=24; // should be option
vf->priv->round = 0;
if(args) sscanf(args, "%d:%d",
&vf->priv->limit,
&vf->priv->round);
return 1;
}
const vf_info_t vf_info_cropdetect = {
"autodetect crop size",
"cropdetect",
"A'rpi",
"",
open,
NULL
};
//===========================================================================//
|
