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Fixed bug #46
Date: Fri, 13 Jan 2006 18:09:45 -0500
From: mhall4400 vipmail kvcc edu
Subject: Possible SDL bug
Greetings
I believe Ive come across a bug in your SDL product (1.2.9), in the CD-ROM
control portion of the library.
When calling the SDL_CDPlay() function to play the last track of a CD using the
offset and length from an SDL_CD structure generated by SDL_CDOpen(), I get the
following error from a call to SDL_Error():
mciSendCommand() error: The specified parameter is out of range for the
specified command.
The code returning the error is:
SDL_CDPlay(g_playingDriveSDLCD,
g_playingDriveSDLCD->track[trackNumberInt].offset,
g_playingDriveSDLCD->track[trackNumberInt].length)
Subtracting one from the length of the provided length seems to repair the
problem:
SDL_CDPlay(g_playingDriveSDLCD,
g_playingDriveSDLCD->track[trackNumberInt].offset,
(g_playingDriveSDLCD->track[trackNumberInt].length) - 1)
Ive replicated this problem on Windows 98 SE (several months since last
patch), fully-patched Window ME, seldom-patched Windows XP SP1, and
fully-patched Windows XP SP2.
While investigating the issue, I came across a line in your librarys win32
source code in file \src\cdrom\win32\SDL_syscdrom.c (source code zip archive
from your download page), function: SDL_SYS_CDGetTOC(), line 226 where you add
1 to the value for length to fix MCI last track length bug. This may be the
source of the issue (because subtracting 1 from the length seems to resolve the
issue). Microsoft may have patched the referenced bug since you wrote that
line.
Mike Hall
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 14 Mar 2006 05:34:39 +0000 |
parents | 0a45995a7fc3 |
children | 00e7c6b7eb03 |
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To compile and install SDL: 1. Run './configure; make; make install' If you are compiling for Windows using gcc, read the FAQ at: http://www.libsdl.org/faq.php?action=listentries&category=4#42 If you are compiling using Visual C++ on Win32, you should read the file VisualC.html 2. Look at the example programs in ./test, and check out the HTML documentation in ./docs to see how to use the SDL library. 3. Join the SDL developer mailing list by sending E-mail to sdl-request@libsdl.org and put "subscribe" in the subject of the message. Or alternatively you can use the web interface: http://www.libsdl.org/mailing-list.php That's it! Sam Lantinga <slouken@libsdl.org>