I'm using SDL on an ARM based board running Linux (Olimex-AT91SAM9261) . I
successfully cross-compiled, installed and tested the libraries (SDL, SDL_mixer,
libaudio, libvorbis, libvorbisfile etc.) on the system. The sound output is done
thru ALSA (SDL_AUDIODRIVER=alsa). And the ogg file decoding thru
libvorbis/libvorbisfile libraries.
Now I'm trying to play ogg files. First I used the Mix_LoadWAV macro from
the SDL_Mixer library for playback. This worked, but the macro decompresses
first the complete audio file into memory and then starts the playback. Thus
leading to a long delay before playing the music. Therefore I tried a different
approach with the Mix_LoadMUS macro (SDL_mixer) to play the ogg file. This
function streams the files directly from the hard-disk and avoids the long
decoding time. Unfortunately ALSA shows several buffer under-runs leading to a
disrupted playback. To fix this I tried different buffer sizes, but the problem
is still existent.
The code works fine on my host system, but not on the ARM target. I'm
wondering if this could be caused by the libvorbis/libvorbisfile libraries?
Any sort of help would be great!
Thanks in advance
Christian
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