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#include <sys/types.h>
#include <sys/inttypes.h>
#include <sys/cdio.h>
#include <sys/scsiio.h>
#define CDROM_LEADOUT 0xAA
static struct ioc_read_toc_entry vcd_entry;
static struct cd_toc_entry vcd_entry_data;
static char vcd_buf[VCD_SECTOR_SIZE];
static inline void
vcd_set_msf(unsigned int sect)
{
unsigned int s = sect;
vcd_entry_data.addr.msf.frame = sect % 75;
sect = sect / 75;
vcd_entry_data.addr.msf.second = sect % 60;
sect = sect / 60;
vcd_entry_data.addr.msf.minute = sect;
}
static inline unsigned int
vcd_get_msf()
{
return vcd_entry_data.addr.msf.frame +
(vcd_entry_data.addr.msf.second +
vcd_entry_data.addr.msf.minute * 60) * 75;
}
int
vcd_seek_to_track(int fd, int track)
{
vcd_entry.address_format = CD_MSF_FORMAT;
vcd_entry.starting_track = track;
vcd_entry.data_len = sizeof(struct cd_toc_entry);
vcd_entry.data = &vcd_entry_data;
if (ioctl(fd, CDIOREADTOCENTRIES, &vcd_entry)) {
perror("ioctl dif1");
return -1;
}
return VCD_SECTOR_DATA * vcd_get_msf();
}
int
vcd_get_track_end(int fd, int track)
{
struct ioc_toc_header tochdr;
if (ioctl(fd, CDIOREADTOCHEADER, &tochdr) == -1) {
perror("read CDROM toc header: ");
return -1;
}
vcd_entry.address_format = CD_MSF_FORMAT;
vcd_entry.starting_track = track < tochdr.ending_track ? (track + 1) : CDROM_LEADOUT;
vcd_entry.data_len = sizeof(struct cd_toc_entry);
vcd_entry.data = &vcd_entry_data;
if (ioctl(fd, CDIOREADTOCENTRYS, &vcd_entry)) {
perror("ioctl dif2");
return -1;
}
return VCD_SECTOR_DATA * vcd_get_msf();
}
void
vcd_read_toc(int fd)
{
struct ioc_toc_header tochdr;
int i;
if (ioctl(fd, CDIOREADTOCHEADER, &tochdr) == -1) {
perror("read CDROM toc header: ");
return;
}
for (i = tochdr.starting_track; i <= tochdr.ending_track; i++) {
struct ioc_read_toc_entry tocentry;
struct cd_toc_entry tocentry_data;
tocentry.starting_track = i;
tocentry.address_format = CD_MSF_FORMAT;
tocentry.data_len = sizeof(struct cd_toc_entry);
tocentry.data = &tocentry_data;
if (ioctl(fd, CDIOREADTOCENTRYS, &tocentry) == -1) {
perror("read CDROM toc entry: ");
return;
}
printf("track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d\n",
(int) tocentry.starting_track,
(int) tocentry.data->addr_type,
(int) tocentry.data->control,
(int) tocentry.address_format,
(int) tocentry.data->addr.msf.minute,
(int) tocentry.data->addr.msf.second,
(int) tocentry.data->addr.msf.frame
);
}
}
static int
vcd_read(int fd, char *mem)
{
struct scsireq sc;
int lba = vcd_get_msf();
int blocks;
int sector_type;
int sync, header_code, user_data, edc_ecc, error_field;
int sub_channel;
int rc;
blocks = 1;
sector_type = 5; /* mode2/form2 */
sync = 0;
header_code = 0;
user_data = 1;
edc_ecc = 0;
error_field = 0;
sub_channel = 0;
memset(&sc, 0, sizeof(sc));
sc.cmd[0] = 0xBE;
sc.cmd[1] = (sector_type) << 2;
sc.cmd[2] = (lba >> 24) & 0xff;
sc.cmd[3] = (lba >> 16) & 0xff;
sc.cmd[4] = (lba >> 8) & 0xff;
sc.cmd[5] = lba & 0xff;
sc.cmd[6] = (blocks >> 16) & 0xff;
sc.cmd[7] = (blocks >> 8) & 0xff;
sc.cmd[8] = blocks & 0xff;
sc.cmd[9] = (sync << 7) | (header_code << 5) | (user_data << 4) |
(edc_ecc << 3) | (error_field << 1);
sc.cmd[10] = sub_channel;
sc.cmdlen = 12;
sc.databuf = (caddr_t) mem;
sc.datalen = 2328;
sc.senselen = sizeof(sc.sense);
sc.flags = SCCMD_READ;
sc.timeout = 10000;
rc = ioctl(fd, SCIOCCOMMAND, &sc);
if (rc == -1) {
perror("SCIOCCOMMAND");
return -1;
}
if (sc.retsts || sc.error) {
fprintf(stderr, "scsi command failed: status %d error %d\n", sc.retsts,
sc.error);
return -1;
}
return VCD_SECTOR_DATA;
}
#ifdef VCD_CACHE
static int vcd_cache_size = 0;
static char *vcd_cache_data = NULL;
static int *vcd_cache_sectors = NULL;
static int vcd_cache_index = 0;
static int vcd_cache_current = -1;
void
vcd_cache_init(int s)
{
vcd_cache_size = s;
vcd_cache_sectors = malloc(s * sizeof(int));
vcd_cache_data = malloc(s * VCD_SECTOR_SIZE);
memset(vcd_cache_sectors, 255, s * sizeof(int));
}
static inline void
vcd_cache_seek(int sect)
{
vcd_cache_current = sect;
}
int
vcd_cache_read(int fd, char *mem)
{
int i;
char *vcd_buf;
for (i = 0; i < vcd_cache_size; i++)
if (vcd_cache_sectors[i] == vcd_cache_current) {
vcd_buf = &vcd_cache_data[i * VCD_SECTOR_SIZE];
++vcd_cache_current;
memcpy(mem, &vcd_buf[VCD_SECTOR_OFFS], VCD_SECTOR_DATA);
return VCD_SECTOR_DATA;
}
vcd_buf = &vcd_cache_data[vcd_cache_index * VCD_SECTOR_SIZE];
vcd_cache_sectors[vcd_cache_index] = vcd_cache_current;
++vcd_cache_index;
if (vcd_cache_index >= vcd_cache_size)
vcd_cache_index = 0;
vcd_set_msf(vcd_cache_current);
memcpy(vcd_buf, &vcd_entry_data.addr.msf, sizeof(vcd_entry_data.addr.msf));
++vcd_cache_current;
memcpy(mem, &vcd_buf[VCD_SECTOR_OFFS], VCD_SECTOR_DATA);
return VCD_SECTOR_DATA;
}
#endif
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