[mythtv] [PATCH] Big audio update redux

Ed Wildgoose lists at wildgooses.com
Mon Oct 11 18:36:18 UTC 2004


Robert Kulagowski wrote:

>
>> Hi, Thanks for the volume control stuff.  I think we need to think 
>> multichannel and break out the interface a little.  Could you please 
>> revisit this patch with the following changes:
>>
>
> Will this allow choosing of the SAP stream?  I had implemented the 
> "Seperate Muting of Left and Right" function when users were receiving 
> DUAL audio channels versus STEREO.  This way, they could at least get 
> mono versions of lang 1 or lang 2.  Since I don't really use the 
> function I never did anything else, like making pseudo stereo by 
> copying the active channel to the muted one.
>
> This doesn't do anything about SAP though, since that's a whole 
> seperate stream.  Not sure if SAP even falls into the "volume" part of 
> mythtv, or if SAP should be handled at a different layer.



What is SAP? 

My idea was really just to have the AudioOutput code look like a driver 
level bit of code, and do any funny stuff in the player app.  This way 
if we need to apply any logic or intelligence to the process, then it's 
all available.  At the end of the day, mute left / play right is just a 
special case of setting levels for channel 1 and channel 2.  My biggest 
interest is actually allowing adjustment of levels of 5.1 output if we 
supported that as an output format in the main player (don't know if we 
do yet though..?)

Ed W


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