Display off with an audio only source?

TonyAngelo wrote:

How are you handling this in the UI, I haven't figured out a way to do this that I am happy with.

TonyAngelo wrote:

I've done something similar and here's the problem I run into; I'm watching DirecTV and under the Listen column I press iTunes. Now I'm watching DTV and listening to iTunes which is what I want. Now the problem comes when I want to change channels or browse the guide, when I press DTV under the Watch column I'm listening to DTV again. This is what I'm having trouble finding an elegant solution to, because sometimes I want to actually listen to DTV when I press it and sometimes I just want to channel surf and listen to what I'm already listening to.

The best I could come up with is having Watch and Listen columns and then by pressing the Watch or Listen text it toggles what you're controlling. I'm not completely satisfied with this but it does what I want.

DEFINE_VARIABLES

VOLATILE DEV dvControlledSource
VOLATILE DEV dvActiveSource
VOLATILE CHAR nMode     // 0 = off, 1 = audio, 2 = video

DEFINE_FUNCTION CHAR (DEV dvRequestedSource, CHAR nRequestedMode)
{
     SELECT   // mode selection
     {
         ACTIVE(nRequestedMode == 0) : 
         {  
            // shutdown procedure, no conditions
         }
         ACTIVE(nRequestedMode == nMode) : {} // do nothing
         ACTIVE(nRequestedMode == 1) :
         {
                // turn on receiver here, etc
         }
         ACTIVE(nRequestedMode == 2} :
        {
               // turn on monitor, using function that tracks warmup time
        }
        nMode = nRequestedMode ;
     }
     SELECT    // source selection
     {
           ACTIVE(dvRequestedSource == dvActiveSource) : {} // do nothing
           ACTIVE(dvRequestedSource == dvCATV) : // make ACTIVE block for each source
           {
                 // Switch receiver input or matrix join
                IF(nMode == 2)
                {
                     WAIT_UNTIL(nWarmUpState = TRUE)
                     // do video switching
                 }
           }
     }
     dvActiveSource = dvRequestedSource ;
     dvControlledSource = dvRequestedSource ;
     
     RETURN nMode ;
}