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Bug 291

Summary: SDL_mixer1.2.7 - MP3 playback is unstable on WinXP...
Product: SDL_mixer Reporter: JeZ+Lee <slnthero>
Component: miscAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P2 CC: darkmatter
Version: unspecified   
Hardware: x86   
OS: Windows (XP)   
URL: http://www.SilentHeroProductions.com/

Description JeZ+Lee 2006-08-02 08:22:32 UTC 
SDL_mixer1.2.7 - MP3 playback is unstable on WinXP...

I read the instructions and checked my source code and everything seems to be written ok, but using certain values for "int Mix_OpenAudio(int frequency, Uint16 format, int channels, int chunksize)" produces program lock-ups (crashes).


Example:

Using:

Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT , MIX_DEFAULT_CHANNELS, 1024)

sometimes crashes on initialization (Mix_OpenAudio) and sometimes crashes on switching current MP3 music playing (Mix_PlayMusic) and sometimes crashes on de-initialization (Mix_CloseAudio).


Changing to:

Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT , MIX_DEFAULT_CHANNELS, 512)

seems to fix the crash problems.


Hope someone can fix these issues and release fixes in SDL_mixer 1.2.8


Jesse "JeZ+Lee" Palser
SLNTHERO@AOL.com
Silent Hero Productions(R)
http://www.SilentHeroProductions.com/
Comment 1 Peter Mulholland 2006-10-03 09:08:41 UTC 
SMPEG is pretty poor. I would suggest using either mpglib (which is now LGPL) or decmpa to support MP3 files.
Comment 2 Sam Lantinga 2007-07-14 11:26:35 UTC 
There was a bug in SDL with certain sample rate conversions which might be the cause of this problem.  Can you download the SDL 1.2.12 prerelease DLL at http://www.libsdl.org/tmp/SDL.dll and see if that fixes your problem?

If you still get the crash, can you try it with the playmus sample application and see if that also crashes?  Either way, can you attach the song that crashes and as much debug information about the actual crash as you can?  (stack trace, local variables, etc.)

Thanks!
Comment 3 Sam Lantinga 2007-07-14 11:29:23 UTC 
By the way, Peter, mpg123 is in unstable development and doesn't have a clean library API yet.  decmpa is based on splay, which is what smpeg uses, but smpeg includes several crash fixes and decoding improvements accumulated over several years of game porting use.
Comment 4 Sam Lantinga 2007-07-21 00:42:26 UTC 
I believe this is fixed in SDL_mixer 1.2.8.  Please reopen this bug if you're still seeing the problem.  Thanks!