mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 06:42:03 +00:00
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
//=================== VideoCD ==========================
|
|
static struct cdrom_tocentry vcd_entry;
|
|
|
|
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;
|
|
}
|
|
|
|
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 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
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
|
|
);
|
|
}
|
|
}
|
|
|
|
#define VCD_SECTOR_SIZE 2352
|
|
#define VCD_SECTOR_OFFS 24
|
|
#define VCD_SECTOR_DATA 2324
|
|
static char vcd_buf[VCD_SECTOR_SIZE];
|
|
|
|
int vcd_read(int fd,char *mem){
|
|
memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
|
|
if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
|
|
|
|
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++;
|
|
}
|
|
}
|
|
|
|
memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
|
|
return VCD_SECTOR_DATA;
|
|
}
|
|
|
|
//================== 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));
|
|
}
|
|
|
|
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);
|
|
memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
|
|
if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
|
|
++vcd_cache_current;
|
|
memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
|
|
return VCD_SECTOR_DATA;
|
|
}
|
|
|
|
#endif
|