mirror of https://github.com/mpv-player/mpv
142 lines
4.3 KiB
C
142 lines
4.3 KiB
C
#include <sys/cdio.h>
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#include <sys/cdrio.h>
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//=================== VideoCD ==========================
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#define CDROM_LEADOUT 0xAA
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typedef struct {
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uint8_t sync [12];
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uint8_t header [4];
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uint8_t subheader [8];
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uint8_t data [2324];
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uint8_t spare [4];
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} cdsector_t;
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typedef struct mp_vcd_priv_st {
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int fd;
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struct ioc_read_toc_single_entry entry;
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cdsector_t buf;
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} mp_vcd_priv_t;
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static inline void vcd_set_msf(mp_vcd_priv_t* vcd, unsigned int sect){
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vcd->entry.entry.addr.msf.frame=sect%75;
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sect=sect/75;
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vcd->entry.entry.addr.msf.second=sect%60;
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sect=sect/60;
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vcd->entry.entry.addr.msf.minute=sect;
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}
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static inline unsigned int vcd_get_msf(mp_vcd_priv_t* vcd){
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return vcd->entry.entry.addr.msf.frame +
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(vcd->entry.entry.addr.msf.second+
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vcd->entry.entry.addr.msf.minute*60)*75;
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}
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int vcd_seek_to_track(mp_vcd_priv_t* vcd, int track){
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vcd->entry.address_format = CD_MSF_FORMAT;
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vcd->entry.track = track;
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if (ioctl(vcd->fd, CDIOREADTOCENTRY, &vcd->entry)) {
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mp_msg(MSGT_STREAM,MSGL_ERR,"ioctl dif1: %s\n",strerror(errno));
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf(vcd);
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}
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int vcd_get_track_end(mp_vcd_priv_t* vcd, int track){
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struct ioc_toc_header tochdr;
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if (ioctl(vcd->fd,CDIOREADTOCHEADER,&tochdr)==-1) {
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mp_msg(MSGT_STREAM,MSGL_ERR,"read CDROM toc header: %s\n",strerror(errno));
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return -1;
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}
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vcd->entry.address_format = CD_MSF_FORMAT;
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vcd->entry.track = track<tochdr.ending_track?(track+1):CDROM_LEADOUT;
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if (ioctl(vcd->fd, CDIOREADTOCENTRY, &vcd->entry)) {
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mp_msg(MSGT_STREAM,MSGL_ERR,"ioctl dif2: %s\n",strerror(errno));
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf(vcd);
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}
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mp_vcd_priv_t* vcd_read_toc(int fd){
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struct ioc_toc_header tochdr;
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mp_vcd_priv_t* vcd;
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int i, min = 0, sec = 0, frame = 0;
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if (ioctl(fd,CDIOREADTOCHEADER,&tochdr)==-1) {
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mp_msg(MSGT_OPEN,MSGL_ERR,"read CDROM toc header: %s\n",strerror(errno));
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return NULL;
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}
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if (identify)
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{
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mp_msg(MSGT_GLOBAL, MSGL_INFO, "ID_VCD_START_TRACK=%d\n", tochdr.starting_track);
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mp_msg(MSGT_GLOBAL, MSGL_INFO, "ID_VCD_END_TRACK=%d\n", tochdr.ending_track);
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}
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for (i=tochdr.starting_track ; i<=tochdr.ending_track + 1; i++){
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struct ioc_read_toc_single_entry tocentry;
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tocentry.track = i<=tochdr.ending_track ? i : CDROM_LEADOUT;
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tocentry.address_format = CD_MSF_FORMAT;
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if (ioctl(fd,CDIOREADTOCENTRY,&tocentry)==-1) {
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mp_msg(MSGT_OPEN,MSGL_ERR,"read CDROM toc entry: %s\n",strerror(errno));
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return NULL;
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}
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if (i<=tochdr.ending_track)
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mp_msg(MSGT_OPEN,MSGL_INFO,"track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d\n",
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(int)tocentry.track,
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(int)tocentry.entry.addr_type,
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(int)tocentry.entry.control,
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(int)tocentry.address_format,
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(int)tocentry.entry.addr.msf.minute,
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(int)tocentry.entry.addr.msf.second,
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(int)tocentry.entry.addr.msf.frame
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);
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if (identify)
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{
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if (i > tochdr.starting_track)
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{
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min = tocentry.entry.addr.msf.minute - min;
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sec = tocentry.entry.addr.msf.second - sec;
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frame = tocentry.entry.addr.msf.frame - frame;
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if ( frame < 0 )
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{
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frame += 75;
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sec --;
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}
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if ( sec < 0 )
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{
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sec += 60;
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min --;
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}
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mp_msg(MSGT_GLOBAL, MSGL_INFO, "ID_VCD_TRACK_%d_MSF=%02d:%02d:%02d\n", i - 1, min, sec, frame);
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}
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min = tocentry.entry.addr.msf.minute;
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sec = tocentry.entry.addr.msf.second;
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frame = tocentry.entry.addr.msf.frame;
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}
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}
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vcd = malloc(sizeof(mp_vcd_priv_t));
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vcd->fd = fd;
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return vcd;
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}
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static int vcd_read(mp_vcd_priv_t* vcd,char *mem){
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if (pread(vcd->fd,&vcd->buf,VCD_SECTOR_SIZE,vcd_get_msf(vcd)*VCD_SECTOR_SIZE)
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!= VCD_SECTOR_SIZE) return 0; // EOF?
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vcd->entry.entry.addr.msf.frame++;
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if (vcd->entry.entry.addr.msf.frame==75){
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vcd->entry.entry.addr.msf.frame=0;
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vcd->entry.entry.addr.msf.second++;
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if (vcd->entry.entry.addr.msf.second==60){
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vcd->entry.entry.addr.msf.second=0;
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vcd->entry.entry.addr.msf.minute++;
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}
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}
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memcpy(mem,vcd->buf.data,VCD_SECTOR_DATA);
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return VCD_SECTOR_DATA;
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}
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