On Thu, Mar 30, 2006 at 04:34:43PM +1000, Erik de Castro Lopo wrote: > [EMAIL PROTECTED] wrote: > > > On Wed, Mar 29, 2006 at 11:47:30PM +1000, Erik de Castro Lopo wrote: > > > Tobias Scharnberg wrote: > > > > > > However, please do not use linear resampling; its just too crappy. > > > > urgh... i just switched my local copies of alsa_in and _out to linear > > resampling, because SRC_SINC_FASTEST was eating CPU juice. > > Just out of curiosity, what kind of hardware are you running this > on and what sort of performance would you find acceptable for your > application. An estimate that provides:
ok... the program is a jack application, that opens an alsa pcm device (obviously not the one, jackd is bound to) and either outputs or inputs the sound. > > - input and output sample rates input is usually 48000 or 44100 (the jackd samplerate) outputrate depends on the soundcard used. 48k or 44k1 +- 10 Hz varying with clock drift... and calculation of resampling factor in float. i will improve the detection algorithm soon again. so that the samplerate is changing slower... > - samples per second per channel throughput wrt the output rate realtime. when the jack source clock is not very bursty (ie LAN or local) 2 channels take 7% cpu on an athlon xp 2000 with a bursty clock source from the internet the cpu usage in top is much higher. like 20% or so. a little too much for a soundcard IO :) > > would give me the best idea of what you are after. i hope you get what i am after now. i am heavily exercising libsrc... > > Erik > -- > +-----------------------------------------------------------+ > Erik de Castro Lopo > +-----------------------------------------------------------+ > Question #2459: Ruling on shaking hands with the opposite sex > http://islamqa.com/index.php?ln=eng&ds=qa&lv=browse&QR=2459&dgn=4 > -- torben Hohn http://galan.sourceforge.net -- The graphical Audio language
