* Copyright 2007, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT License.
*/
#include "cddb.h"
static int32
cddb_sum(int32 n)
{
int32 result = 0;
while (n > 0) {
result = result + (n % 10);
n = n / 10;
}
return result;
}
Computes the CD Disc ID as specified in the FreeDB how-to (code taken from there).
*/
uint32
compute_cddb_disc_id(scsi_toc_toc &toc)
{
int32 numTracks = toc.last_track + 1 - toc.first_track;
uint32 n = 0;
for (int32 i = 0; i < numTracks; i++) {
n = n + cddb_sum((toc.tracks[i].start.time.minute * 60)
+ toc.tracks[i].start.time.second);
}
int32 t = ((toc.tracks[numTracks].start.time.minute * 60)
+ toc.tracks[numTracks].start.time.second)
- ((toc.tracks[0].start.time.minute * 60)
+ toc.tracks[0].start.time.second);
return (n % 0xff) << 24 | t << 8 | numTracks;
}
