linuxaudio.org

[Conrad Berh=F6rster]

quoted text
>i have written a channel class, which collects data from (file) sources an=

d=20

quoted text
>copies it to a buffer. Jack will get this buffer and put it into his strea=

ms.=20

quoted text
>So far, I think, this is a normal design with the following code

>

>for (unsigned int n =3D 0; n < nframes; ++n)

>{

>=09   pBuffer[n] +=3D pFrames[n];

>=09   pBuffer[n]  *=3D volume;

>}

>

>i know, it's not really optimized. But it works as an example. as you can=

=20

quoted text
>think, pBuffer and pFrames are float* and volume is also a float.=20

>

>now it happens, when the volume is 0, after 3-5 seconds, the CPU will run =

into=20

quoted text
>100%.=20

>

>a workaround is the following before the loop=20

>

>=09if(volume < 0.0000001)

>=09=09volume =3D 0.0000001;

>

>But i try to understand, what happens here. Is the compiler overoptimizing=

=20

quoted text
>zeros.=20

It'd be a lot more helpful to see the full source but from what you're=20

writing I'd be willing to bet you're encountering denormals.
Cheers, Tim