[mythtv-commits] Ticket #1104: multi channel audio support

[MythTV]

#1104: multi channel audio support
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 Reporter:  Mark Spieth  |        Owner:  ijr 
     Type:  enhancement  |       Status:  new 
 Priority:  minor        |    Milestone:  0.21
Component:  mythtv       |      Version:  head
 Severity:  medium       |   Resolution:      
  Mlocked:  0            |  
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Comment(by paul at paulcatchpole.co.uk):

 Hmm, I've added some debugging messages to the various OpenDevice
 instances to see if the above segment of code is dying somewhere whilst
 checking whether the device is already open. You can see from the below,
 that it does actually get inside the ALSA-specific OpenDevice instance.

 [insert 10 min delay here...]

 Right, after adding some extra debugging [badly], it appears that when
 finally deciding what to open, the number of channels is still set to 2,
 rather than the 6 which is indicated by the AC3 stream. See below!

 2007-10-08 00:50:31.010 AFD: Audio format changed
                         from id( AC3)     0Hz  0ch   0bps    ; id( AC3)
 0Hz  0ch   0bps
                         to   id( AC3) 48000Hz  6ch  16bps    ; id( AC3)
 48000Hz  2ch  16bps
 2007-10-08 00:50:31.013 AO: Killing AudioOutputDSP
 2007-10-08 00:50:31.013 Opening audio device 'softvol|surround51m'. ch 2
 sr 48000
 2007-10-08 00:50:31.013 Inside ALSA:OpenDevice
 QString::arg(): Argument missing: Audio channels is two, so should open
 primary upmixer! Audio channels=, 2
 2007-10-08 00:50:31.013 Audio channels is two, so should open primary
 upmixer! Audio channels=
 2007-10-08 00:50:31.013 Opening ALSA audio device 'softvol'.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/1104#comment:47>
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