forums.ps2dev.org

[HolgiB]

I am working on an audio player application for the PSP, based on SDL.

It would be nice to have something moving in the player GUI. So my idea was to integrate a kind oscilloscope like many player apps have.

I googled a lot but still not found a small example or informations about something like that can be realized.

Anybody here can tell me something about this or where I can find a good example?

Holger

[groepaz]

thats pretty trivial, something like that:

for(i=0;i<size;i++)
{
putpixel(i,halfsize+(audiobuffer[i]/somefactor));
}

do that after every swap of the audio buffer and you'll get something like the scope visualisation in xmms/winamp
_________________
http://www.hitmen-console.org
http://hitmen.c02.at/files/yapspd/

[HolgiB]

Thank you! I was already looking at Fourier which looked way to complicate for me :-).

This looks really easy. So I will have to experiment with the values a little to get a good result.

Holger

[groepaz]

hehe...the fourier transformation you would need to do an "equalizer" type of visualisation. (although if all you want is visualisation you can get away with simpler, not terribly accurate, stuff)
_________________
http://www.hitmen-console.org
http://hitmen.c02.at/files/yapspd/