[Vorbis] OGG decoding/multi-channel mixing

[Tor-Einar Jarnbjo]

Joost Meijles schrieb:
> Finally is it possible to mix OGG streams without first decoding them 
> to PCM? 
Perhaps it would be possible to do the mixing in the frequency domain 
before completing the decoding process by converting to PCM - (i)MDCT, 
but it would be very difficult with the multiple window sizes used by 
Vorbis and not make much sense, since the convertion between time domain 
data (PCM) and frequency domain data is at least theoretically lossless. 
In any case, the psyco-accoustic model must be applied to the resulting 
mix when reencoding the data to achieve reasonable compression (rate and 
quality).

Tor