Re: [Gwc-general] Cursor stops too soon on 0.20.10

[Jeff W. <we...@ya...>]

Ahh, the cursor -- my nemisis.  This has been the constant thorn in 
GWC's (and my) foot for a long time.

GWC handles playback with 2 timers -- one for feeding audio to the audio 
device, and one for redrawing
the cursor.  The audio playing timer just delivers bytes to the audio 
device at regular intervals to make
sure the audio buffers never empty.  But the cursor timer must know how 
many bytes have actually been
played in order to get the cursor positioned in the window.  So it 
queries the audio device to determine
how many audio bytes have been processed.  I think what is happening is 
the audio device is saying all
the bytes have been processed, but what it really means is all the bytes 
are in my buffer, not necessarily
processed (played).

I am more aware of this than before, because I recently (last week) 
upgraded to Fedora Core 3, and have
the native alsa audio, and the cursor is stopping for me to soon, or not 
even showing up at all if the sound
segment is too short (under 1 second).

In the short term, I'm going to investigate this a little more, 
hopefully get to the bottom of it and fix it. 
In the longer term, I'm going to think about using Jack for the audio 
playback.

Thanks again for your feedback.
jw


John Cirillo wrote:

> As a result of a recent system upgrade on Debian I now have GWC 
> 0.20.10 instead of 0.20.3 (I think)
> One thing that happens with some severity now is that the cursor stops 
> about 2/3 of the way across the wave during play.  It just doesn't 
> make it to the end of the waveform.
> The side-effect is that I'm not convinced that the cursor is really 
> keeping up with the played sound at any time.
> Has anyone else noticed this?  Has the redraw of the cursor been 
> changed between these two versions?
> I am at a loss as to what to do now.   I like some of the other 
> features in this release, so I plan to keep using as long as I can 
> stand it.   I hope it's not a hardware demand issue. I'm using a 3DFX 
> Voodoo 3 which isn't so fast by today's standards.
>
> John
>
>
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