[hpoussin] 64112: [CDFS] - Correctly decode address of first session, which now uses MSF format since r64106

Author: hpoussin
Date: Wed Sep 10 19:45:57 2014
New Revision: 64112

URL: http://svn.reactos.org/svn/reactos?rev=64112&view=rev
Log:
[CDFS]
- Correctly decode address of first session, which now uses MSF format since r64106

Modified:
    trunk/reactos/drivers/filesystems/cdfs/fsctl.c

Modified: trunk/reactos/drivers/filesystems/cdfs/fsctl.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/cdfs/fs...
==============================================================================
--- trunk/reactos/drivers/filesystems/cdfs/fsctl.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/cdfs/fsctl.c	[iso-8859-1] Wed Sep 10 19:45:57 2014
@@ -200,7 +200,6 @@
     PVD_HEADER VdHeader;
     ULONG Size;
     ULONG Offset;
-    ULONG i;
     CDROM_TOC Toc;

DPRINT("CdfsGetVolumeData\n");
@@ -227,10 +226,14 @@
     DPRINT("FirstTrack %u, LastTrack %u, TrackNumber %u\n",
         Toc.FirstTrack, Toc.LastTrack, Toc.TrackData[0].TrackNumber);

-    Offset = 0;
-    for (i = 0; i < 4; i++)
-    {
-        Offset = (Offset << 8) + Toc.TrackData[0].Address[i];
+    Offset =  Toc.TrackData[0].Address[1] * 60 * 75;
+    Offset += Toc.TrackData[0].Address[2] * 75;
+    Offset += Toc.TrackData[0].Address[3];
+    if (Offset >= 150)
+    {
+        /* Remove MSF numbering offset of first frame */
+        /* FIXME: should be done only for real cdroms? */
+        Offset -= 150;
     }
     CdInfo->VolumeOffset = Offset;