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
|
package matchers
var (
TypeMp4 = newType("mp4", "video/mp4")
TypeM4v = newType("m4v", "video/x-m4v")
TypeMkv = newType("mkv", "video/x-matroska")
TypeWebm = newType("webm", "video/webm")
TypeMov = newType("mov", "video/quicktime")
TypeAvi = newType("avi", "video/x-msvideo")
TypeWmv = newType("wmv", "video/x-ms-wmv")
TypeMpeg = newType("mpg", "video/mpeg")
TypeFlv = newType("flv", "video/x-flv")
)
var Video = Map{
TypeMp4: Mp4,
TypeM4v: M4v,
TypeMkv: Mkv,
TypeWebm: Webm,
TypeMov: Mov,
TypeAvi: Avi,
TypeWmv: Wmv,
TypeMpeg: Mpeg,
TypeFlv: Flv,
}
func M4v(buf []byte) bool {
return len(buf) > 10 &&
buf[0] == 0x0 && buf[1] == 0x0 &&
buf[2] == 0x0 && buf[3] == 0x1C &&
buf[4] == 0x66 && buf[5] == 0x74 &&
buf[6] == 0x79 && buf[7] == 0x70 &&
buf[8] == 0x4D && buf[9] == 0x34 &&
buf[10] == 0x56
}
func Mkv(buf []byte) bool {
return (len(buf) > 15 &&
buf[0] == 0x1A && buf[1] == 0x45 &&
buf[2] == 0xDF && buf[3] == 0xA3 &&
buf[4] == 0x93 && buf[5] == 0x42 &&
buf[6] == 0x82 && buf[7] == 0x88 &&
buf[8] == 0x6D && buf[9] == 0x61 &&
buf[10] == 0x74 && buf[11] == 0x72 &&
buf[12] == 0x6F && buf[13] == 0x73 &&
buf[14] == 0x6B && buf[15] == 0x61) ||
(len(buf) > 38 &&
buf[31] == 0x6D && buf[32] == 0x61 &&
buf[33] == 0x74 && buf[34] == 0x72 &&
buf[35] == 0x6f && buf[36] == 0x73 &&
buf[37] == 0x6B && buf[38] == 0x61)
}
func Webm(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x1A && buf[1] == 0x45 &&
buf[2] == 0xDF && buf[3] == 0xA3
}
func Mov(buf []byte) bool {
return len(buf) > 7 &&
buf[0] == 0x0 && buf[1] == 0x0 &&
buf[2] == 0x0 && buf[3] == 0x14 &&
buf[4] == 0x66 && buf[5] == 0x74 &&
buf[6] == 0x79 && buf[7] == 0x70
}
func Avi(buf []byte) bool {
return len(buf) > 10 &&
buf[0] == 0x52 && buf[1] == 0x49 &&
buf[2] == 0x46 && buf[3] == 0x46 &&
buf[8] == 0x41 && buf[9] == 0x56 &&
buf[10] == 0x49
}
func Wmv(buf []byte) bool {
return len(buf) > 9 &&
buf[0] == 0x30 && buf[1] == 0x26 &&
buf[2] == 0xB2 && buf[3] == 0x75 &&
buf[4] == 0x8E && buf[5] == 0x66 &&
buf[6] == 0xCF && buf[7] == 0x11 &&
buf[8] == 0xA6 && buf[9] == 0xD9
}
func Mpeg(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x0 && buf[1] == 0x0 &&
buf[2] == 0x1 && buf[3] >= 0xb0 &&
buf[3] <= 0xbf
}
func Flv(buf []byte) bool {
return len(buf) > 3 &&
buf[0] == 0x46 && buf[1] == 0x4C &&
buf[2] == 0x56 && buf[3] == 0x01
}
func Mp4(buf []byte) bool {
return len(buf) > 11 &&
(buf[4] == 'f' && buf[5] == 't' && buf[6] == 'y' && buf[7] == 'p') &&
((buf[8] == 'a' && buf[9] == 'v' && buf[10] == 'c' && buf[11] == '1') ||
(buf[8] == 'i' && buf[9] == 's' && buf[10] == 'o' && buf[11] == '2') ||
(buf[8] == 'i' && buf[9] == 's' && buf[10] == 'o' && buf[11] == 'm') ||
(buf[8] == 'm' && buf[9] == 'm' && buf[10] == 'p' && buf[11] == '4') ||
(buf[8] == 'm' && buf[9] == 'p' && buf[10] == '4' && buf[11] == '1') ||
(buf[8] == 'm' && buf[9] == 'p' && buf[10] == '4' && buf[11] == '2') ||
(buf[8] == 'm' && buf[9] == 'p' && buf[10] == '7' && buf[11] == '1') ||
(buf[8] == 'm' && buf[9] == 's' && buf[10] == 'n' && buf[11] == 'v') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'a' && buf[11] == 's') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 's' && buf[11] == 'c') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 's' && buf[11] == 'h') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 's' && buf[11] == 'm') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 's' && buf[11] == 'p') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 's' && buf[11] == 's') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'x' && buf[11] == 'c') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'x' && buf[11] == 'h') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'x' && buf[11] == 'm') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'x' && buf[11] == 'p') ||
(buf[8] == 'n' && buf[9] == 'd' && buf[10] == 'x' && buf[11] == 's'))
}
|
