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//=================== VideoCD ==========================
#if defined(linux) || defined(sun)
#if defined(linux)
#include <linux/cdrom.h>
#elif defined(sun)
#include <sys/cdio.h>
static int sun_vcd_read(int, int*);
#endif
static struct cdrom_tocentry vcd_entry;
static inline void vcd_set_msf(unsigned int sect){
vcd_entry.cdte_addr.msf.frame=sect%75;
sect=sect/75;
vcd_entry.cdte_addr.msf.second=sect%60;
sect=sect/60;
vcd_entry.cdte_addr.msf.minute=sect;
}
static inline unsigned int vcd_get_msf(){
return vcd_entry.cdte_addr.msf.frame +
(vcd_entry.cdte_addr.msf.second+
vcd_entry.cdte_addr.msf.minute*60)*75;
}
int vcd_seek_to_track(int fd,int track){
vcd_entry.cdte_format = CDROM_MSF;
vcd_entry.cdte_track = track;
if (ioctl(fd, CDROMREADTOCENTRY, &vcd_entry)) {
perror("ioctl dif1");
return -1;
}
return VCD_SECTOR_DATA*vcd_get_msf();
}
int vcd_get_track_end(int fd,int track){
struct cdrom_tochdr tochdr;
if (ioctl(fd,CDROMREADTOCHDR,&tochdr)==-1)
{ perror("read CDROM toc header: "); return -1; }
vcd_entry.cdte_format = CDROM_MSF;
vcd_entry.cdte_track = track<tochdr.cdth_trk1?(track+1):CDROM_LEADOUT;
if (ioctl(fd, CDROMREADTOCENTRY, &vcd_entry)) {
perror("ioctl dif2");
return -1;
}
return VCD_SECTOR_DATA*vcd_get_msf();
}
void vcd_read_toc(int fd){
struct cdrom_tochdr tochdr;
int i;
if (ioctl(fd,CDROMREADTOCHDR,&tochdr)==-1)
{ perror("read CDROM toc header: "); return; }
for (i=tochdr.cdth_trk0 ; i<=tochdr.cdth_trk1 ; i++){
struct cdrom_tocentry tocentry;
tocentry.cdte_track = i;
tocentry.cdte_format = CDROM_MSF;
if (ioctl(fd,CDROMREADTOCENTRY,&tocentry)==-1)
{ perror("read CDROM toc entry: "); return; }
printf("track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d mode: %d\n",
(int)tocentry.cdte_track,
(int)tocentry.cdte_adr,
(int)tocentry.cdte_ctrl,
(int)tocentry.cdte_format,
(int)tocentry.cdte_addr.msf.minute,
(int)tocentry.cdte_addr.msf.second,
(int)tocentry.cdte_addr.msf.frame,
(int)tocentry.cdte_datamode
);
}
}
static char vcd_buf[VCD_SECTOR_SIZE];
static int vcd_read(int fd,char *mem){
#if defined(linux)
memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
#elif defined(sun)
{
int offset;
if (sun_vcd_read(fd, &offset) <= 0) return 0;
memcpy(mem,&vcd_buf[offset],VCD_SECTOR_DATA);
}
#endif
vcd_entry.cdte_addr.msf.frame++;
if (vcd_entry.cdte_addr.msf.frame==75){
vcd_entry.cdte_addr.msf.frame=0;
vcd_entry.cdte_addr.msf.second++;
if (vcd_entry.cdte_addr.msf.second==60){
vcd_entry.cdte_addr.msf.second=0;
vcd_entry.cdte_addr.msf.minute++;
}
}
return VCD_SECTOR_DATA;
}
#ifdef sun
#include <sys/scsi/generic/commands.h>
#include <sys/scsi/impl/uscsi.h>
#define SUN_XAREAD 1 /*fails on atapi drives*/
#define SUN_MODE2READ 2 /*fails on atapi drives*/
#define SUN_SCSIREAD 3
#define SUN_VCDREAD SUN_SCSIREAD
static int sun_vcd_read(int fd, int *offset)
{
#if SUN_VCDREAD == SUN_XAREAD
struct cdrom_cdxa cdxa;
cdxa.cdxa_addr = vcd_get_msf();
cdxa.cdxa_length = 1;
cdxa.cdxa_data = vcd_buf;
cdxa.cdxa_format = CDROM_XA_SECTOR_DATA;
if(ioctl(fd,CDROMCDXA,&cdxa)==-1) {
perror("CDROMCDXA");
return 0;
}
*offset = 0;
#elif SUN_VCDREAD == SUN_MODE2READ
struct cdrom_read cdread;
cdread.cdread_lba = 4*vcd_get_msf();
cdread.cdread_bufaddr = vcd_buf;
cdread.cdread_buflen = 2336;
if(ioctl(fd,CDROMREADMODE2,&cdread)==-1) {
perror("CDROMREADMODE2");
return 0;
}
*offset = 8;
#elif SUN_VCDREAD == SUN_SCSIREAD
struct uscsi_cmd sc;
union scsi_cdb cdb;
int lba = vcd_get_msf();
int blocks = 1;
int sector_type;
int sync, header_code, user_data, edc_ecc, error_field;
int sub_channel;
/* sector_type = 3; *//* mode2 */
sector_type = 5; /* mode2/form2 */
sync = 0;
header_code = 0;
user_data = 1;
edc_ecc = 0;
error_field = 0;
sub_channel = 0;
memset(&cdb, 0, sizeof(cdb));
memset(&sc, 0, sizeof(sc));
cdb.scc_cmd = 0xBE;
cdb.cdb_opaque[1] = (sector_type) << 2;
cdb.cdb_opaque[2] = (lba >> 24) & 0xff;
cdb.cdb_opaque[3] = (lba >> 16) & 0xff;
cdb.cdb_opaque[4] = (lba >> 8) & 0xff;
cdb.cdb_opaque[5] = lba & 0xff;
cdb.cdb_opaque[6] = (blocks >> 16) & 0xff;
cdb.cdb_opaque[7] = (blocks >> 8) & 0xff;
cdb.cdb_opaque[8] = blocks & 0xff;
cdb.cdb_opaque[9] = (sync << 7) |
(header_code << 5) |
(user_data << 4) |
(edc_ecc << 3) |
(error_field << 1);
cdb.cdb_opaque[10] = sub_channel;
sc.uscsi_cdb = (caddr_t)&cdb;
sc.uscsi_cdblen = 12;
sc.uscsi_bufaddr = vcd_buf;
sc.uscsi_buflen = 2336;
sc.uscsi_flags = USCSI_ISOLATE | USCSI_READ;
sc.uscsi_timeout = 20;
if (ioctl(fd, USCSICMD, &sc)) {
perror("USCSICMD: READ CD");
return -1;
}
if (sc.uscsi_status) {
fprintf(stderr, "scsi command failed with status %d\n", sc.uscsi_status);
return -1;
}
*offset = 0;
return 1;
#else
#error SUN_VCDREAD
#endif
}
#endif /*sun*/
//================== VCD CACHE =======================
#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; // index to first free (or oldest) cache sector
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){
// found in the cache! :)
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;
}
// NEW cache entry:
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;
// read data!
vcd_set_msf(vcd_cache_current);
#if defined(linux)
memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
#elif defined(sun)
{
int offset;
if (sun_vcd_read(fd, &offset) <= 0) return 0;
memcpy(mem,&vcd_buf[offset],VCD_SECTOR_DATA);
}
#endif
++vcd_cache_current;
return VCD_SECTOR_DATA;
}
#endif
#else /* linux || sun */
int vcd_seek_to_track(int fd,int track)
{
return -1;
}
int vcd_get_track_end(int fd,int track)
{
return -1;
}
void vcd_read_toc(int fd)
{
}
static char vcd_buf[VCD_SECTOR_SIZE];
static int vcd_read(int fd,char *mem)
{
return -1;
}
#endif /* !linux && !sun */
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