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List: linux-sound
Subject: SOUND_MIXER_OUTSRC
From: Hrafnkell Eiriksson <he () kvintus ! dk>
Date: 1999-08-14 11:55:43
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Hi
I have a SoundBlaster 16 in my system. I'm using kernel 2.2.9
and the OSS/Free sounddriver.
I've written a program that needs to be able to disconnect the
line in input of the soundcard from the output mixer. The program
does real-time processing (or as close as you can get in the userspace
of a non realtime system :) of the line-in signal and the signal
on the soundcard output should only be the processed signal, not
the original signal too.
I use the following ioctl() to do this:
device = SOUND_MIXER_LINE;
ioctl(mixer_fd, MIXER_WRITE(SOUND_MIXER_OUTSRC), &device);
This works fine. But when checking if other soundcards supported
this feature by doing grep OUTSRC *.c in /usr/src/linux/drivers/sound/
only the files sb_mixer.c and dmasound.c contained this string.
Do soundcards generally not support this or has it just not been
implemented?
--
//-----------------------//-------------------------------------------------
// Hrafnkell Eiriksson //
// he@kvintus.dk //
// // "Blessed are they who go around in circles,
// // for they shall be known as Wheels"
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