Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!ucsd!ucbvax!van-bc!ubc-cs!alberta!mts.ucs.UAlberta.CA!Bill_Burris
From: userENY7@mts.ucs.UAlberta.CA (Bill Burris)
Newsgroups: comp.sys.next
Subject: snddriver_stream_setup
Message-ID: <RN.8@mts.ucs.UAlberta.CA>
Date: 4 Jan 91 18:52:15 GMT
Organization: MTS Univ of Alberta
Lines: 26

Does anyone know what the low_water and high_water parameters in this
function are.
 
   k_err = snddriver_stream_setup(dev_port, owner_port,
                                 SNDDRIVER_STREAM_FROM_DSP,
                                 read_buf_size, read_width,
                                 low_water, high_water,
                                 &protocol, &read_port);
 
Here is what the on line documentation has to say.
 
"The low_water and high_water values are used by the driver to optimize
control flow on the stream."
 
This tells me what they are for, but not anything about how I should
choose approprite values. 
Should they always have these values: 
    int low_water = 48*1024;
    int high_water = 64*1024;
as used in "dsp_example_3.c".
 
Send replys to bill@geosparc.phys.ualberta.ca
 
Bill Burris
bill@geosparc.phys.ualberta.ca
University of Alberta