Re: [xine-devel] lcd-plugin

[Michael Roitzsch <mroi@xxxxxxxxxxxxxxxxxxxxx>]

Hi Simon,

> Does it matter if I register the plugin as audio_filter or  
> audio_visualization?

audio filters are supposed to have one audio input and one audio  
output, while audio visualizations typically have an additional video  
output.

> My interception of the audio_target doesn't work. The port_open  
> function doesn't get called. I have basically just kept the example  
> code. I know it's not easy to know what's wrong just like that, but  
> is there some common error done with this?
>
> I run xine as:
> xine --verbose --post lcdinfo Breathing_Chemicals.mp3
>
> that should be enough wirering right? The open_plugin function gets  
> called at least.

Could you post the code of your plugin, please?

> And as I haven't done this kind of programming before I also wonder  
> a bit about the arcitechtual part as well... How often does  
> put_buffer get called? Often enough to update the lcd smoothly, say  
> 20 fps...?

I think there is no real guarantee here. Imagine that playback would  
use a long buffer in the audio output, then your plugin would not be  
called any more at an arbitrary time before the playback actually ends.

> Or is a separate thread needed to feed the lcd periodcly?

I think this solution would be cleaner.

Michael




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