Date: Thu, 11 Mar 2004 18:45:17 +0900

From: Hayashi Naoyuki
Subject: Re: Tru64 cdrom and pthread option fix

I wrote
/* Some CD-ROM drives cannot play the first 150 frames. */
in src/cdrom/osf/SDL_syscdrom.c
and
Some CD-ROM drives(ex. TEAC CD-532E) cannot play first 150 frames(aka gap).

but this is not right.

It is written in MMC that LBA = 4500*M + 75*S + F - 150.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40875

src/cdrom/osf/SDL_syscdrom.c

@@ -393,13 +393,12 @@ static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
     int end;
 
     bzero(&msf, sizeof(msf));
-    start += 150; /* Some CD-ROM drives cannot play the first 150 frames. */
     end = start +length;
-    FRAMES_TO_MSF(start,
+    FRAMES_TO_MSF(start + 150, /* LBA = 4500*M + 75*S + F - 150 */
 		  &msf.msf_starting_M_unit,
 		  &msf.msf_starting_S_unit,
 		  &msf.msf_starting_F_unit);
-    FRAMES_TO_MSF(end,
+    FRAMES_TO_MSF(end + 150, /* LBA = 4500*M + 75*S + F - 150 */
 		  &msf.msf_ending_M_unit,
 		  &msf.msf_ending_S_unit,
 		  &msf.msf_ending_F_unit);
@@ -449,3 +448,4 @@ void SDL_SYS_CDQuit(void)
     }
 }
 
+