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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "talloc.h"
#include "options/m_option.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "vf.h"
#define MAX_Q 100
struct vf_priv_s {
struct mp_image *queued[MAX_Q];
int num_queued;
int cfg_num;
};
static void flush(struct vf_instance *vf)
{
for (int n = 0; n < vf->priv->num_queued; n++)
mp_image_unrefp(&vf->priv->queued[n]);
vf->priv->num_queued = 0;
}
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
flush(vf);
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static int filter_ext(struct vf_instance *vf, struct mp_image *mpi)
{
struct vf_priv_s *p = vf->priv;
if (mpi) {
if (p->num_queued == p->cfg_num) {
vf_add_output_frame(vf, p->queued[p->num_queued - 1]);
p->num_queued--;
}
p->num_queued++;
for (int n = p->num_queued - 1; n > 0; n--)
p->queued[n] = p->queued[n - 1];
p->queued[0] = mpi;
} else {
// EOF
while (p->num_queued) {
vf_add_output_frame(vf, p->queued[p->num_queued - 1]);
p->num_queued--;
}
}
return 0;
}
static int control(vf_instance_t *vf, int request, void *data)
{
if (request == VFCTRL_SEEK_RESET) {
flush(vf);
return CONTROL_OK;
}
return CONTROL_UNKNOWN;
}
static void uninit(vf_instance_t *vf)
{
flush(vf);
}
static int vf_open(vf_instance_t *vf)
{
vf->config = config;
vf->filter_ext = filter_ext;
vf->control = control;
vf->uninit = uninit;
return 1;
}
#define OPT_BASE_STRUCT struct vf_priv_s
const vf_info_t vf_info_buffer = {
.description = "buffer a number of frames",
.name = "buffer",
.open = vf_open,
.priv_size = sizeof(struct vf_priv_s),
.options = (const struct m_option[]){
OPT_INTRANGE("num", cfg_num, 0, 1, MAX_Q, OPTDEF_INT(2)),
{0}
},
};
|
