mirror of https://github.com/mpv-player/mpv
279 lines
6.9 KiB
C
279 lines
6.9 KiB
C
//=================== VideoCD ==========================
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#if defined(linux) || defined(sun)
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#if defined(linux)
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#include <linux/cdrom.h>
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#elif defined(sun)
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#include <sys/cdio.h>
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static int sun_vcd_read(int, int*);
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#endif
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static struct cdrom_tocentry vcd_entry;
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static inline void vcd_set_msf(unsigned int sect){
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vcd_entry.cdte_addr.msf.frame=sect%75;
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sect=sect/75;
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vcd_entry.cdte_addr.msf.second=sect%60;
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sect=sect/60;
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vcd_entry.cdte_addr.msf.minute=sect;
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}
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static inline unsigned int vcd_get_msf(){
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return vcd_entry.cdte_addr.msf.frame +
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(vcd_entry.cdte_addr.msf.second+
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vcd_entry.cdte_addr.msf.minute*60)*75;
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}
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int vcd_seek_to_track(int fd,int track){
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vcd_entry.cdte_format = CDROM_MSF;
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vcd_entry.cdte_track = track;
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if (ioctl(fd, CDROMREADTOCENTRY, &vcd_entry)) {
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perror("ioctl dif1");
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf();
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}
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int vcd_get_track_end(int fd,int track){
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struct cdrom_tochdr tochdr;
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if (ioctl(fd,CDROMREADTOCHDR,&tochdr)==-1)
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{ perror("read CDROM toc header: "); return -1; }
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vcd_entry.cdte_format = CDROM_MSF;
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vcd_entry.cdte_track = track<tochdr.cdth_trk1?(track+1):CDROM_LEADOUT;
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if (ioctl(fd, CDROMREADTOCENTRY, &vcd_entry)) {
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perror("ioctl dif2");
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf();
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}
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void vcd_read_toc(int fd){
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struct cdrom_tochdr tochdr;
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int i;
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if (ioctl(fd,CDROMREADTOCHDR,&tochdr)==-1)
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{ perror("read CDROM toc header: "); return; }
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for (i=tochdr.cdth_trk0 ; i<=tochdr.cdth_trk1 ; i++){
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struct cdrom_tocentry tocentry;
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tocentry.cdte_track = i;
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tocentry.cdte_format = CDROM_MSF;
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if (ioctl(fd,CDROMREADTOCENTRY,&tocentry)==-1)
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{ perror("read CDROM toc entry: "); return; }
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printf("track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d mode: %d\n",
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(int)tocentry.cdte_track,
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(int)tocentry.cdte_adr,
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(int)tocentry.cdte_ctrl,
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(int)tocentry.cdte_format,
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(int)tocentry.cdte_addr.msf.minute,
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(int)tocentry.cdte_addr.msf.second,
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(int)tocentry.cdte_addr.msf.frame,
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(int)tocentry.cdte_datamode
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);
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}
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}
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static char vcd_buf[VCD_SECTOR_SIZE];
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static int vcd_read(int fd,char *mem){
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#if defined(linux)
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memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
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if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
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memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
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#elif defined(sun)
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{
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int offset;
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if (sun_vcd_read(fd, &offset) <= 0) return 0;
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memcpy(mem,&vcd_buf[offset],VCD_SECTOR_DATA);
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}
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#endif
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vcd_entry.cdte_addr.msf.frame++;
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if (vcd_entry.cdte_addr.msf.frame==75){
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vcd_entry.cdte_addr.msf.frame=0;
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vcd_entry.cdte_addr.msf.second++;
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if (vcd_entry.cdte_addr.msf.second==60){
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vcd_entry.cdte_addr.msf.second=0;
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vcd_entry.cdte_addr.msf.minute++;
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}
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}
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return VCD_SECTOR_DATA;
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}
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#ifdef sun
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#include <sys/scsi/generic/commands.h>
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#include <sys/scsi/impl/uscsi.h>
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#define SUN_XAREAD 1 /*fails on atapi drives*/
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#define SUN_MODE2READ 2 /*fails on atapi drives*/
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#define SUN_SCSIREAD 3
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#define SUN_VCDREAD SUN_SCSIREAD
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static int sun_vcd_read(int fd, int *offset)
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{
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#if SUN_VCDREAD == SUN_XAREAD
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struct cdrom_cdxa cdxa;
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cdxa.cdxa_addr = vcd_get_msf();
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cdxa.cdxa_length = 1;
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cdxa.cdxa_data = vcd_buf;
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cdxa.cdxa_format = CDROM_XA_SECTOR_DATA;
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if(ioctl(fd,CDROMCDXA,&cdxa)==-1) {
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perror("CDROMCDXA");
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return 0;
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}
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*offset = 0;
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#elif SUN_VCDREAD == SUN_MODE2READ
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struct cdrom_read cdread;
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cdread.cdread_lba = 4*vcd_get_msf();
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cdread.cdread_bufaddr = vcd_buf;
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cdread.cdread_buflen = 2336;
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if(ioctl(fd,CDROMREADMODE2,&cdread)==-1) {
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perror("CDROMREADMODE2");
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return 0;
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}
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*offset = 8;
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#elif SUN_VCDREAD == SUN_SCSIREAD
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struct uscsi_cmd sc;
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union scsi_cdb cdb;
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int lba = vcd_get_msf();
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int blocks = 1;
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int sector_type;
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int sync, header_code, user_data, edc_ecc, error_field;
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int sub_channel;
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/* sector_type = 3; *//* mode2 */
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sector_type = 5; /* mode2/form2 */
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sync = 0;
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header_code = 0;
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user_data = 1;
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edc_ecc = 0;
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error_field = 0;
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sub_channel = 0;
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memset(&cdb, 0, sizeof(cdb));
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memset(&sc, 0, sizeof(sc));
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cdb.scc_cmd = 0xBE;
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cdb.cdb_opaque[1] = (sector_type) << 2;
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cdb.cdb_opaque[2] = (lba >> 24) & 0xff;
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cdb.cdb_opaque[3] = (lba >> 16) & 0xff;
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cdb.cdb_opaque[4] = (lba >> 8) & 0xff;
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cdb.cdb_opaque[5] = lba & 0xff;
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cdb.cdb_opaque[6] = (blocks >> 16) & 0xff;
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cdb.cdb_opaque[7] = (blocks >> 8) & 0xff;
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cdb.cdb_opaque[8] = blocks & 0xff;
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cdb.cdb_opaque[9] = (sync << 7) |
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(header_code << 5) |
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(user_data << 4) |
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(edc_ecc << 3) |
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(error_field << 1);
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cdb.cdb_opaque[10] = sub_channel;
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sc.uscsi_cdb = (caddr_t)&cdb;
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sc.uscsi_cdblen = 12;
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sc.uscsi_bufaddr = vcd_buf;
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sc.uscsi_buflen = 2336;
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sc.uscsi_flags = USCSI_ISOLATE | USCSI_READ;
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sc.uscsi_timeout = 20;
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if (ioctl(fd, USCSICMD, &sc)) {
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perror("USCSICMD: READ CD");
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return -1;
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}
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if (sc.uscsi_status) {
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fprintf(stderr, "scsi command failed with status %d\n", sc.uscsi_status);
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return -1;
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}
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*offset = 0;
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return 1;
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#else
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#error SUN_VCDREAD
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#endif
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}
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#endif /*sun*/
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//================== VCD CACHE =======================
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#ifdef VCD_CACHE
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static int vcd_cache_size=0;
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static char *vcd_cache_data=NULL;
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static int *vcd_cache_sectors=NULL;
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static int vcd_cache_index=0; // index to first free (or oldest) cache sector
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static int vcd_cache_current=-1;
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void vcd_cache_init(int s){
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vcd_cache_size=s;
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vcd_cache_sectors=malloc(s*sizeof(int));
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vcd_cache_data=malloc(s*VCD_SECTOR_SIZE);
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memset(vcd_cache_sectors,255,s*sizeof(int));
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}
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static inline void vcd_cache_seek(int sect){
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vcd_cache_current=sect;
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}
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int vcd_cache_read(int fd,char* mem){
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int i;
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char* vcd_buf;
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for(i=0;i<vcd_cache_size;i++)
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if(vcd_cache_sectors[i]==vcd_cache_current){
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// found in the cache! :)
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vcd_buf=&vcd_cache_data[i*VCD_SECTOR_SIZE];
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++vcd_cache_current;
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memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
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return VCD_SECTOR_DATA;
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}
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// NEW cache entry:
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vcd_buf=&vcd_cache_data[vcd_cache_index*VCD_SECTOR_SIZE];
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vcd_cache_sectors[vcd_cache_index]=vcd_cache_current;
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++vcd_cache_index;if(vcd_cache_index>=vcd_cache_size)vcd_cache_index=0;
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// read data!
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vcd_set_msf(vcd_cache_current);
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#if defined(linux)
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memcpy(vcd_buf,&vcd_entry.cdte_addr.msf,sizeof(struct cdrom_msf));
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if(ioctl(fd,CDROMREADRAW,vcd_buf)==-1) return 0; // EOF?
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memcpy(mem,&vcd_buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
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#elif defined(sun)
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{
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int offset;
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if (sun_vcd_read(fd, &offset) <= 0) return 0;
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memcpy(mem,&vcd_buf[offset],VCD_SECTOR_DATA);
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}
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#endif
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++vcd_cache_current;
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return VCD_SECTOR_DATA;
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}
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#endif
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#else /* linux || sun */
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int vcd_seek_to_track(int fd,int track)
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{
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return -1;
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}
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int vcd_get_track_end(int fd,int track)
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{
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return -1;
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}
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void vcd_read_toc(int fd)
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{
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}
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static char vcd_buf[VCD_SECTOR_SIZE];
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static int vcd_read(int fd,char *mem)
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{
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return -1;
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}
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#endif /* !linux && !sun */
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