stream/vcd_read_win32.h

   1 #ifndef MPLAYER_VCD_READ_WIN32_H
   2 #define MPLAYER_VCD_READ_WIN32_H
   3
   4 #include <ddk/ntddcdrm.h>
   5 #include "mp_msg.h"
   6
   7 typedef struct mp_vcd_priv_st mp_vcd_priv_t;
   8
   9 /*
  10    Unlike Unices, upon reading TOC, Windows will retrieve information for
  11    all tracks, so we don't need to call DeviceIoControl() in functions
  12    like vcd_seek_to_track() and vcd_get_track_end() for each track. Instead
  13    we cache the information in mp_vcd_priv_st.
  14 */
  15 struct mp_vcd_priv_st {
  16     HANDLE hd;
  17     CDROM_TOC toc;
  18     unsigned sect;
  19     char buf[VCD_SECTOR_SIZE];
  20 };
  21
  22 static inline void vcd_set_msf(mp_vcd_priv_t* vcd, unsigned sect)
  23 {
  24     vcd->sect = sect;
  25 }
  26
  27 static inline unsigned vcd_get_msf(mp_vcd_priv_t* vcd, int track){
  28     int index = track - vcd->toc.FirstTrack;
  29     /* -150 to compensate the 2-second pregap */
  30     return vcd->toc.TrackData[index].Address[3] +
  31         (vcd->toc.TrackData[index].Address[2] +
  32          vcd->toc.TrackData[index].Address[1] * 60) * 75 - 150;
  33 }
  34
  35 int vcd_seek_to_track(mp_vcd_priv_t* vcd, int track)
  36 {
  37     unsigned sect;
  38     if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
  39         return -1;
  40     sect = vcd_get_msf(vcd, track);
  41     vcd_set_msf(vcd, sect);
  42     return VCD_SECTOR_DATA * (sect + 2);
  43 }
  44
  45 int vcd_get_track_end(mp_vcd_priv_t* vcd, int track)
  46 {
  47     if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
  48         return -1;
  49     return VCD_SECTOR_DATA * (vcd_get_msf(vcd, track + 1));
  50 }
  51
  52 mp_vcd_priv_t* vcd_read_toc(int fd)
  53 {
  54     DWORD dwBytesReturned;
  55     HANDLE hd;
  56     int i, min = 0, sec = 0, frame = 0;
  57     mp_vcd_priv_t* vcd = malloc(sizeof(mp_vcd_priv_t));
  58     if (!vcd)
  59         return NULL;
  60
  61     hd = (HANDLE)_get_osfhandle(fd);
  62     if (!DeviceIoControl(hd, IOCTL_CDROM_READ_TOC, NULL, 0, &vcd->toc,
  63                 sizeof(CDROM_TOC), &dwBytesReturned, NULL)) {
  64         mp_msg(MSGT_OPEN, MSGL_ERR, "read CDROM toc header: %lu\n",
  65                 GetLastError());
  66         free(vcd);
  67         return NULL;
  68     }
  69
  70     mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_START_TRACK=%d\n",
  71             vcd->toc.FirstTrack);
  72     mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_END_TRACK=%d\n",
  73             vcd->toc.LastTrack);
  74
  75     for (i = vcd->toc.FirstTrack; i <= vcd->toc.LastTrack + 1; i++) {
  76         int index = i - vcd->toc.FirstTrack;
  77         if (i <= vcd->toc.LastTrack) {
  78             mp_msg(MSGT_OPEN, MSGL_INFO, "track %02d:  adr=%d  ctrl=%d"
  79                     "  %02d:%02d:%02d\n",
  80                     vcd->toc.TrackData[index].TrackNumber,
  81                     vcd->toc.TrackData[index].Adr,
  82                     vcd->toc.TrackData[index].Control,
  83                     vcd->toc.TrackData[index].Address[1],
  84                     vcd->toc.TrackData[index].Address[2],
  85                     vcd->toc.TrackData[index].Address[3]);
  86         }
  87
  88         if (mp_msg_test(MSGT_IDENTIFY, MSGL_INFO)) {
  89             if (i > vcd->toc.FirstTrack) {
  90                 min = vcd->toc.TrackData[index].Address[1] - min;
  91                 sec = vcd->toc.TrackData[index].Address[2] - sec;
  92                 frame = vcd->toc.TrackData[index].Address[3] - frame;
  93                 if (frame < 0) {
  94                     frame += 75;
  95                     sec--;
  96                 }
  97                 if (sec < 0) {
  98                     sec += 60;
  99                     min--;
 100                 }
 101                 mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VCD_TRACK_%d_MSF="
 102                         "%02d:%02d:%02d\n", i - 1, min, sec, frame);
 103                 min = vcd->toc.TrackData[index].Address[1];
 104                 sec = vcd->toc.TrackData[index].Address[2];
 105                 frame = vcd->toc.TrackData[index].Address[3];
 106             }
 107         }
 108     }
 109
 110     vcd->hd = hd;
 111     return vcd;
 112 }
 113
 114 static int vcd_read(mp_vcd_priv_t* vcd, char *mem)
 115 {
 116     DWORD dwBytesReturned;
 117     RAW_READ_INFO cdrom_raw;
 118
 119     /* 2048 isn't a typo: it's the Windows way. */
 120     cdrom_raw.DiskOffset.QuadPart = (long long)(2048 * vcd->sect);
 121     cdrom_raw.SectorCount = 1;
 122     cdrom_raw.TrackMode = XAForm2;
 123
 124     if (!DeviceIoControl(vcd->hd, IOCTL_CDROM_RAW_READ, &cdrom_raw,
 125                 sizeof(RAW_READ_INFO), vcd->buf, sizeof(vcd->buf),
 126                 &dwBytesReturned, NULL))
 127         return 0;
 128
 129     vcd->sect++;
 130     memcpy(mem, &vcd->buf[VCD_SECTOR_OFFS], VCD_SECTOR_DATA);
 131     return VCD_SECTOR_DATA;
 132 }
 133
 134 #endif /* MPLAYER_VCD_READ_WIN32_H */
 135
 136 /*
 137 vim:noet:sw=4:cino=\:0,g0
 138 */