[mythtv] ReplayGain support for MythMusic

[Chris Hamilton]

> I've created a ticket and attached a patch adding a software preamp to
> AudioOutput and AudioOutputBase.  I tested it on my system by adding
> some code to MythMusic that randomly changed the gain each time play()
> was called, and it appears to work smoothly.  Adding this is quite low
> risk because the preamp is disabled by default, and must be specifically
> initialized and enabled before that code path is executed.
> 
> http://svn.mythtv.org/trac/ticket/4804
> 
> A sanity check and maybe a few other people testing the code would be
> appreciated.  Also, it currently only supports full 8-bit, 16-bit or
> 32-bit signed audio samples.  Will anything else ever be used?
> 
> I have some follow-up patches that implement necessary database changes
> and metadata extraction.  Should I bother to submit this stuff, or
> should I wait until the metadata extraction has been refactored to use
> libtag exclusively?

Anybody get a chance to look at this?  What can I do to get this
committed?  I'd like to continue with adding ReplayGain support, but
this is a required piece of infrastructure that needs to be there first.

Regards,

Chris Hamilton