blob: b9a35f5410da4f301ac7822bf17b6ed65293f712 (
plain) (
blame)
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
|
#include "Decoder.h"
bool Decoder::initted;
unsigned char *Decoder::clp;
unsigned char Decoder::clp_table[1024];
int Decoder::DecodeFrame(YV12_PLANES *yv12, int *width, int *height, int *keyframe)
{
if (getheader())
{
if (firstFrame)
{
if (init())
return 1;
}
Frame frame;
getpicture(frame);
yv12->y.baseAddr = frame[0];
yv12->y.rowBytes = coded_picture_width;
yv12->u.baseAddr = frame[1];
yv12->u.rowBytes = chrom_width;
yv12->v.baseAddr = frame[2];
yv12->v.rowBytes = chrom_width;
*width = horizontal_size;
*height = vertical_size;
*keyframe = (pict_type == PCT_INTRA)?1:0;
return 0;
}
return 1;
}
Decoder::Decoder()
{
for (int cc=0; cc<3; cc++)
{
refframe[cc]=0;
newframe[cc]=0;
oldrefframe[cc]=0;
edgeframe[cc]=0;
edgeframeorig[cc]=0;
}
horizontal_size=0;
vertical_size=0;
mb_width=0;
mb_height=0;
coded_picture_width=0;
coded_picture_height=0;
chrom_width=0;
chrom_height=0;
pict_type=0;
fault=0;
refidct=0;
quant=0;
escapemode=0;
firstFrame=true;
if (!initted)
{
/* clip table */
clp=&clp_table[384];
for (int i=-384; i<640; i++)
clp[i] = (i<0) ? 0 : ((i>255) ? 255 : i);
initted=true;
}
idct.init();
}
Decoder::~Decoder()
{
for (int cc=0; cc<3; cc++)
{
free(refframe[cc]);
free(oldrefframe[cc]);
free(edgeframeorig[cc]);
}
}
#define ROUNDUP16(size) (((size)+15) & ~15)
int Decoder::init()
{
int cc;
unsigned int size;
mb_width = (horizontal_size+15)/16;
mb_height = (vertical_size +15)/16;
coded_picture_width = ROUNDUP16(horizontal_size);
coded_picture_height = ROUNDUP16(vertical_size);
chrom_width = coded_picture_width>>1;
chrom_height = coded_picture_height>>1;
if (coded_picture_width >= (65536 - 64)
|| coded_picture_height >= (65536 - 64))
return 1;
for (cc=0; cc<3; cc++)
{
if (cc==0)
size = coded_picture_width*coded_picture_height;
else
size = chrom_width*chrom_height;
refframe[cc] = (unsigned char *)malloc(size);
oldrefframe[cc] = (unsigned char *)malloc(size);
}
for (cc=0; cc<3; cc++)
{
if (cc==0)
{
size = (coded_picture_width+64)*(coded_picture_height+64);
edgeframeorig[cc] = (unsigned char *)malloc(size);
edgeframe[cc] = edgeframeorig[cc] + (coded_picture_width+64) * 32 + 32;
}
else
{
size = (chrom_width+32)*(chrom_height+32);
edgeframeorig[cc] = (unsigned char *)malloc(size);
edgeframe[cc] = edgeframeorig[cc] + (chrom_width+32) * 16 + 16;
}
}
return 0;
}
|
