[wdmaudiodev] Re: 61883 Talk
- From: "Mathieu Routhier" <mrouthier@xxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 10 Jun 2004 17:14:00 -0400
Hi,
Well, I have tried, a few months ago, to do exactly the same thing as
you're trying to do. Unfortunately, I ran into the same frustrations.
This layer is very lightly documented and the returned error values did
not give me enough information to figure out what was wrong even if I
double-checked every field of every structure. So you're not alone.
I finally ended up implementing my own 61883 streaming (i.e. I did not
use the Av_61883 functions but instead used the basic 1394 functions
such as REQUEST_ISOCH_TALK). If I remember correctly, I noticed some
limitations in Av_61883 later on which would have affected me in the
particular project I was working on.
That's about it. Not much help, eh :(
Mat
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of John D. Farmer
Sent: Thursday, June 10, 2004 4:56 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] 61883 Talk
Greetings,
I am writing a driver to support audio over 1394. I am using a
AVStream
minidriver to get the audio data and convert it to a AM824 format to
send
down the stack to my device (the stack being: My
Driver-->AVC-->61883-->1394). I am using AVC and 61883 to initialize my
hardware. I get the plugs from 61883 and fashion a connection handle
using
Av61883_Connect. The connection returns success and I seem to receive a
valid connection handle, my problems begin when I try to use
Av61883_Talk.
The talk function returns STATUS_INVALID_PARAMETER. I can successfully
use
the connection handle to attach a frame, using Av61883_AttachFrame.
This
function returns STATUS_SUCCESS. This leads me to believe that I have a
valid connection handle. I am very confident that I have configured the
hardware and my driver correctly to this point. I cannot find anything
in
the documentation to suggest that I have done something wrong or out of
order. Any feedback or help would be greatly appreciated.
TIA,
John D. Farmer
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