[mythtv] OSX backend obstacles?

Geoffrey Kruse gkruse at gmail.com
Sun Dec 11 19:45:04 EST 2005

On Dec 11, 2005, at 3:07 PM, Isaac Richards wrote:

> On Sunday 11 December 2005 14:54, Robert Johnston wrote:
>> On 12/11/05, Daniel Kristjansson <danielk at cuymedia.net> wrote:
>>> On Sun, 2005-12-11 at 17:02 +0000, Dave Abrahams wrote:
>>>> Which appears to be entirely concerned with getting video
>>>> off of capture hardware /cards/.  Since my DCT-6200
>>>> communicates over FireWire, I'm wondering if that ought to
>>>> be a non-issue?
>>> Not quite a non-issue, but a surmountable one. Right now we use
>>> the Linux firewire libraries. OSX probably has similar libraries
>>> but MythTV would have to be adapted to use them, either with an
>>> adaptation layer in MythTV or an external library that emulates
>>> the Linux firewire libraries with calls to the OSX firewire
>>> libraries. There are recorders like the DBOX2 that should already
>>> work on OSX.
>> Would it be possible to "Modularize" the Myth calls for recorders, so
>> you have an IVTV Module, a Firewire Module, a DVB Module and so on?
>> This would make it pretty easy to make a "Linux Firewire Module" and
>> an "OSX Firewire Module" (And, say, a "Solaris Firewire Module" or
>> whatever else people want to do) and to dynamically link them in at
>> runtime (So if you get a Firewire HD box, you don't need to  
>> completely
>> recompile Myth to use it, just compile the Required Firewire module,
>> drop it in, and restart MythBackend).
> Really, the recorder code's already modular enough.  Common  
> functionality in a
> few base classes, with a bunch of hardware specific children.   
> Minor amounts
> of recorder specific code in the main TVRec class to drive it all.   
> I see no
> point in making tiny little separately loadable modules - it just  
> increases
> overhead and potential problems (we already get enough "bug"  
> reports when
> something changes in mythtv and people don't update mythplugins to  
> match) for
> very little gain.
> As for 'completely recompiling' after enabling or disabling a  
> single recorder
> module, that's what ccache is for. =)  It'd really only involve the  
> full
> recompilation of 3 or 4 total files, and relinking libmythtv.
> Isaac
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Just a note here, there is code available from Apple implementing a  
simple firewire TV recorder.   Here's the link:


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