[mythtv] Mac OS X patch 20

Nigel Pearson nigel at ind.tansu.com.au
Fri Jul 30 00:23:26 EDT 2004

Mac OS X does not have sys/soundcard.h, a mixer device, or ioctls
to control the volume thereof, so #ifndef _WIN32 is inappropriate

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A) #ifdef __linux__
       may need to become
    #if defined(__linux__) || defined(__FreeBSD__)
       but I am not sure that *BSD have sys/soundcard.h,
       a mixer, or those ioctls

B) I am still writing Mac OS X audio output (audiooutputdarwin.cpp & h),
    but since there is no hard-coded device for audio, the code is very
    different to the other outputs' (e.g. it needs to get a list of all
    audio-capable devices, and select one matching relevant criteria).

    For volumecontrol.cpp to manipulate the volume of the correct device,
    it would probably need to call some methods in the AudioOutputDarwin

1) Does this seem reasonable? (given that none of the
    other audio classes have methods to control volume)

2) Why does MythTV use a mixer device?
    Do people really have other programs generating sound
    at the same time as they are watching TV?

Nigel Pearson, nigel at ind.tansu.com.au | "Now the world has gone to bed,
Telstra BI&D, Sydney, Australia       |  Darkness won't engulf my head,
Office: 8255 4222    Fax:  8255 3153  |  I can see by infrared,
Mobile: 0408 664435  Home: 9792 6998  |  How I hate the night." -Marvin

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