MP3 playback too fast when using more than 2 channels

[SDLBugzilla]

This bug report was migrated from our old Bugzilla tracker.

Reported in version: unspecified
Reported for operating system, platform: Windows (XP), x86

Comments on the original bug report:

On 2006-06-24 19:43:09 +0000, joda.bot wrote:

hi

OS: Windows 2000
Soundcard: SB Live Value with 4 Channels

The MP3 playback (using SMPEG) is too fast when using more than 2 sound channels on windows. I don't hear any surround sound with SDL release 1.2.10. There might be some bugs in the code calling SDL.

I'm using SDL_mixer 1.2.7 with SDL 1.2.10. There was a problem compiling SDL_mixer against SDL 1.2.10 (using MinGW).

Compile time error: already defined int8_t when SDL_mixer includes <stdint.h>.

Orignal code:
#else
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef signed long long int64_t;
typedef unsigned long long uint64_t;
#ifndef SIZE_T_DEFINED
#define SIZE_T_DEFINED
typedef unsigned int size_t;
#endif
typedef unsigned int uintptr_t;
#endif /* _MSC_VER */

Fix: Just include <stdint.h>
#else
#include <stdint.h>
#ifndef SIZE_T_DEFINED
#define SIZE_T_DEFINED
typedef unsigned int size_t;
#endif
#endif /* _MSC_VER */

Perhaps you can spot an error in the code:
https://svn.sourceforge.net/svnroot/armagetronad/armagetronad/branches/0.3.0/armagetronad/src/engine/sound/sdl_mixer/

The code was not written by me, but one of my fellow Armagetron Advanced developers.

Download Alpha Test Canditate:
http://beta.armagetronad.net/fetch.php/0.3%252F20060624%252Farmagetronad-0.3.0_alpha5009.win32.exe

Steps:

1. Set System Settings->Sound->Channels to 4 or 6
2. Restart game to activate 4 or 6 channel sound
3. Set System Settings->Sound->Custom Playlist: [path to some .m3u list]
   Note: The .m3u has to be outside the game directory and should contain an mp3.
4. Set System Settings->Sound->Use Playlist: Custom
5. Restart game to activate 4 or 6 channel sound
6. Bind "next track" in System Settings->Misc Settings->Global Keybindings
   "next track" to some key
7. Start a local game: Game->Local Game
8. press next track

Note: The last time I tried to start it with the "waveout" driver the game just crashed with 4 channels, so you probably need dsound driver (or even 4 channels).

Hope you can help out. I noticed that you applied some fixes to SVN. Are some of the problems already fixed ?

On 2006-06-25 13:18:49 +0000, Sam Lantinga wrote:

The compiling bug is fixed in subversion, thanks!

SMPEG doesn't support 4/6 channel sound, you'd have to write a patch for that and send it to icculus@icculus.org.

I don't have a surround sound setup, so I can't really test any of the surround sound code myself.

On 2006-06-26 02:48:37 +0000, joda.bot wrote:

A simple patch already exists.
See ftp://ling.lll.hawaii.edu/pub/greg/Surround-SDL.tgz aka Bug 96 :)