blob: bea8e118d28bc23c6f94900f0439766ac714ece8 (
plain)
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
|
diff -urp xmms-mad-0.8-org/src/xmms-mad.c xmms-mad-0.8/src/xmms-mad.c
--- xmms-mad-0.8-org/src/xmms-mad.c 2005-12-04 23:18:21.000000000 +0200
+++ xmms-mad-0.8/src/xmms-mad.c 2005-12-04 23:34:53.000000000 +0200
@@ -76,6 +76,31 @@ xmmsmad_set_eq (int on, float preamp, fl
//printf("set_eq\n");
}
+
+/* Following mp3 header check has been copied from XMMS mp3 input plugin. */
+static int mpg123_head_check(unsigned char *buffer)
+{
+ unsigned int head = (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3];
+ if ((head & 0xffe00000) != 0xffe00000)
+ return FALSE;
+ if (!((head >> 17) & 3))
+ return FALSE;
+ if (((head >> 12) & 0xf) == 0xf)
+ return FALSE;
+ if (!((head >> 12) & 0xf))
+ return FALSE;
+ if (((head >> 10) & 0x3) == 0x3)
+ return FALSE;
+ if (((head >> 19) & 1) == 1 &&
+ ((head >> 17) & 3) == 3 &&
+ ((head >> 16) & 1) == 1)
+ return FALSE;
+ if ((head & 0xffff0000) == 0xfffe0000)
+ return FALSE;
+ return TRUE;
+}
+
+
static int
xmmsmad_is_our_file (char *filename)
{
@@ -96,9 +121,8 @@ xmmsmad_is_our_file (char *filename)
fin = open (filename, O_RDONLY);
if (fin >= 0 && read (fin, check, 4) == 4)
{
- /* If first two bytes are a sync header or three bytes are "ID3" */
- if ( (check[0] == 0xff && (check[1] & 0x70) == 0x70)
- || memcmp (check, "ID3", 3) == 0)
+ /* If first 4 bytes are a sync header or three bytes are "ID3" */
+ if (mpg123_head_check(check) || memcmp (check, "ID3", 3) == 0)
{
rtn = 1;
}
|
