int mb_disc_read_unportable(mb_disc_private *disc, const char *device) {
int fd;
unsigned long lba;
int first, last;
int i;
if ( (fd = open(device, O_RDONLY | O_NONBLOCK)) < 0 ) {
snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
"cannot open device `%s'", device);
return 0;
}
/*
* Find the numbers of the first track (usually 1) and the last track.
*/
if ( read_toc_header(fd, &first, &last) < 0 ) {
snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
"cannot read table of contents");
close(fd);
return 0;
}
/* basic error checking */
if ( last == 0 ) {
snprintf(disc->error_msg, MB_ERROR_MSG_LENGTH,
"this disc has no tracks");
close(fd);
return 0;
}
disc->first_track_num = first;
disc->last_track_num = last;
/*
* Get the logical block address (lba) for the end of the audio data.
* The "LEADOUT" track is the track beyond the final audio track, so
* we're looking for the block address of the LEADOUT track.
*/
read_leadout(fd, &lba);
disc->track_offsets[0] = lba + 150;
/*
* Now, for every track, find out the block address where it starts.
*/
for (i = first; i <= last; i++) {
read_toc_entry(fd, i, &lba);
disc->track_offsets[i] = lba + 150;
}
close(fd);
return 1;
}
static int read_leadout(int fd, unsigned long *lba) {
struct cdrom_multisession ms;
int ret;
ms.addr_format = CDROM_LBA;
ret = ioctl(fd, CDROMMULTISESSION, &ms);
if ( ms.xa_flag ) {
*lba = ms.addr.lba - XA_INTERVAL;
return ret;
}
return read_toc_entry(fd, CDROM_LEADOUT, lba);
}
static int read_leadout(int fd, unsigned long *lba) {
struct ioc_toc_header th;
struct ioc_read_toc_single_entry te;
int ret;
ret = ioctl(fd, CDIOREADTOCHEADER, &th);
te.track = th.ending_track;
te.address_format = CD_LBA_FORMAT;
ret = ioctl(fd, CDIOREADTOCENTRY, &te);
if (( te.entry.control & CD_DATA_TRACK) != 0 ) {
*lba = ntohl(te.entry.addr.lba) - 11400;
return ret;
}
return read_toc_entry(fd, CD_LEADOUT, lba);
}
static int read_leadout(int fd, unsigned long *lba) {
int ret;
unsigned long ms_offset;
struct cdrom_tocentry te;
te.cdte_track = 1;
te.cdte_format = CDROM_LBA;
ret = ioctl(fd, CDROMREADTOCENTRY, &te);
ret = ioctl(fd, CDROMREADOFFSET, &ms_offset);
if ( ms_offset != te.cdte_addr.lba ) {
*lba = ms_offset - XA_INTERVAL;
return ret;
}
return read_toc_entry(fd, CDROM_LEADOUT, lba);
}
