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#include <ddk/ntddcdrm.h>
typedef struct mp_vcd_priv_st mp_vcd_priv_t;
/*
Unlike Unices, upon reading TOC, Windows will retrieve information for
all tracks, so we don't need to call DeviceIoControl() in functions
like vcd_seek_to_track() and vcd_get_track_end() for each track. Instead
we cache the information in mp_vcd_priv_st.
*/
struct mp_vcd_priv_st {
HANDLE hd;
CDROM_TOC toc;
unsigned sect;
char buf[VCD_SECTOR_SIZE];
};
static inline void vcd_set_msf(mp_vcd_priv_t* vcd, unsigned sect)
{
vcd->sect = sect;
}
static inline unsigned vcd_get_msf(mp_vcd_priv_t* vcd, int track){
int index = track + vcd->toc.FirstTrack - 1;
/* -150 to compensate the 2-second pregap */
return vcd->toc.TrackData[index].Address[3] +
(vcd->toc.TrackData[index].Address[2] +
vcd->toc.TrackData[index].Address[1] * 60) * 75 - 150;
}
int vcd_seek_to_track(mp_vcd_priv_t* vcd, int track)
{
unsigned sect;
if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
return -1;
sect = vcd_get_msf(vcd, track);
vcd_set_msf(vcd, sect);
return VCD_SECTOR_DATA * (sect + 2);
}
int vcd_get_track_end(mp_vcd_priv_t* vcd, int track)
{
if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
return -1;
return VCD_SECTOR_DATA * (vcd_get_msf(vcd, track + 1));
}
mp_vcd_priv_t* vcd_read_toc(int fd)
{
DWORD dwBytesReturned;
HANDLE hd;
int i, min = 0, sec = 0, frame = 0;
mp_vcd_priv_t* vcd = malloc(sizeof(mp_vcd_priv_t));
if (!vcd)
return NULL;
hd = (HANDLE)_get_osfhandle(fd);
if (!DeviceIoControl(hd, IOCTL_CDROM_READ_TOC, NULL, 0, &vcd->toc,
sizeof(CDROM_TOC), &dwBytesReturned, NULL)) {
mp_msg(MSGT_OPEN, MSGL_ERR, "read CDROM toc header: %u\n",
GetLastError());
free(vcd);
return NULL;
}
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_START_TRACK=%d\n",
vcd->toc.FirstTrack);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_END_TRACK=%d\n",
vcd->toc.LastTrack);
for (i = vcd->toc.FirstTrack; i <= vcd->toc.LastTrack + 1; i++) {
int index = i - vcd->toc.FirstTrack;
if (i <= vcd->toc.LastTrack) {
mp_msg(MSGT_OPEN, MSGL_INFO, "track %02d: adr=%d ctrl=%d"
" %02d:%02d:%02d\n",
vcd->toc.TrackData[index].TrackNumber,
vcd->toc.TrackData[index].Adr,
vcd->toc.TrackData[index].Control,
vcd->toc.TrackData[index].Address[1],
vcd->toc.TrackData[index].Address[2],
vcd->toc.TrackData[index].Address[3]);
}
if (mp_msg_test(MSGT_IDENTIFY, MSGL_INFO)) {
if (i > vcd->toc.FirstTrack) {
min = vcd->toc.TrackData[index].Address[1] - min;
if (frame < 0) {
frame += 75;
sec--;
}
if (sec < 0) {
sec += 60;
min--;
}
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_TRACK_%d_MSF="
"%02d:%02d:%02d\n", i - 1, min, sec, frame);
min = vcd->toc.TrackData[index].Address[1];
sec = vcd->toc.TrackData[index].Address[2];
frame = vcd->toc.TrackData[index].Address[3];
}
}
}
vcd->hd = hd;
return vcd;
}
static int vcd_read(mp_vcd_priv_t* vcd, char *mem)
{
DWORD dwBytesReturned;
RAW_READ_INFO cdrom_raw;
/* 2048 isn't a typo: it's the Windows way. */
cdrom_raw.DiskOffset.QuadPart = (long long)(2048 * vcd->sect);
cdrom_raw.SectorCount = 1;
cdrom_raw.TrackMode = XAForm2;
if (!DeviceIoControl(vcd->hd, IOCTL_CDROM_RAW_READ, &cdrom_raw,
sizeof(RAW_READ_INFO), vcd->buf, sizeof(vcd->buf),
&dwBytesReturned, NULL))
return 0;
vcd->sect++;
memcpy(mem, &vcd->buf[VCD_SECTOR_OFFS], VCD_SECTOR_DATA);
return VCD_SECTOR_DATA;
}
/*
vim:noet:sw=4:cino=\:0,g0
*/
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