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Bug 19

Summary: SDL_mixer+mikmod broken on Mac OSX
Product: SDL_mixer Reporter: Ryan C. Gordon <icculus>
Component: miscAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: codepro
Version: unspecified   
Hardware: PowerPC   
OS: Mac OS Classic   

Description Ryan C. Gordon 2006-01-03 12:08:53 UTC 
Hello !

On Windows and Linux SDL_mixer works without problems.
When i compile it on Mac OSX SDL_mixers internal MikMod
version produces no sound output.

MIDI, WAVE and others formats work, also libmikmod works.

Is this a known problem ?

iBook G4 1 GHz, Latest OSX Tiger with all Updates.
XCode 2.2

CU
Comment 1 Ryan C. Gordon 2006-01-03 12:09:13 UTC 
Ryan C. Gordon wrote:

>>>> When i compile it on Mac OSX SDL_mixers internal MikMod version 
>>>> produces no sound output.
>
>>
>> I believe it's been posted before, but I haven't had a chance to
>> research it at all.


Ryan, I think it has something to do with some interesting code in virtch2.c
;-)

#if defined(macintosh) || defined(__APPLE__)
#define NO_64BIT_MIXER
#endif
[... snip ...]

#ifdef NO_64BIT_MIXER
                                /* Uh oh, the 64-bit mixers don't compile...
*/;
#else

The latter essentially translates to "produce no output if the song is long
enough", where 'long enough' is a few milliseconds at 22.5KHz.
We should see how later versions of MikMod handled 64bit ints on Apple
compilers.

-Alex.
Comment 2 Jon Atkins 2006-01-04 02:58:32 UTC 
what about using the external libmikmod linkage, which should be later (if if gets updated of course) than the one in SDL_mixer.  At least try that option (which is already in SDL_mixer's configure script) to see if a later version does fix the problem.
Comment 3 Alex Volkov 2006-01-04 13:11:55 UTC 
Though I don't have MacOSX myself, I've checked the various libmikmod versions (pre- and post- the mentioned change). None of the libmikmod versions ever had such #ifdef code. According to CVS, these #ifdefs were introduced during a port to MacOS (classic?) in virtch2.c rev 1.2.
The next revision (1.3) added the defined(__APPLE__) to the existing #ifdef, which broke MacOSX:
  "Darrell Walisser - Sun Aug 19 00:47:22 PDT 2001
   * Fixed compilation problems with mikmod under MacOS"
-#ifdef macintosh
+#if defined(macintosh) || defined(__APPLE__)

I am willing to bet the disabled code will, in fact, compile just fine on MacOSX ;) But someone should try it, of course. Perhaps some better #ifdef checks should be used so that they only apply to MacOS classic.
Comment 4 Ryan C. Gordon 2006-01-19 06:28:23 UTC 
Tossing the SDL_mixer bugs to Sam (all three of which might be the same bug in practice)...if you don't want these, toss them back to me.

--ryan.
Comment 5 Ryan C. Gordon 2006-01-27 11:23:04 UTC 
Setting Sam as "QA Contact" on all bugs (even resolved ones) so he'll definitely be in the loop to any further discussion here about SDL.

--ryan.
Comment 6 Sam Lantinga 2006-04-30 21:16:19 UTC 
Fixed in subversion, thanks!