Re: [jazzplusplus-devel] Cross-Compiling

[Joakim V. <jo...@ve...>]

Ok, so that should mean that we can use tNullPlayer when we cross-compile,
until we get portmidi working.

I'm all for switching to a more reliable method of Midi communication 
than the current one,
but it should be possible to use both the Portmidi and the current Alsa 
driver
like its now(or was) possible to choose either Alsa and OSS.

Maybe its easy to get a playback-only portmidi driver working initially?


(BTW I think you were looking for the idiom "real time privilegies")

/Joakim

Dave Fancella wrote:

>On Wednesday 31 March 2004 08:41 am, Joakim Verona wrote:
>  
>
>>Well, this seems really cool!
>>
>>I remember that the jazz architecture allowed for several audio/midi
>>drivers,
>>and that the configure script makes it possible to enable/disable drivers.
>>
>>Can we make a "dummy" midi/audio driver, that does absolutely nothing
>>that we can use to compile
>>against while porting to other platforms?
>>    
>>
>
>tNullPlayer, I think, is what you're looking for.  Check player.h.  Also, read 
>through the OnInit method of the wxApp object (I forget was jazz calls it, is 
>it TheApp?), and you'll see lots of places where it is used.
>
>The setup is this:
>
>For no audio, tNullPlayer derives from tPlayer.  Each subsequent audio driver 
>derives from tPlayer.
>
>I don't recall how tPlayer is setup right off the top of my head, but 
>somewhere along the line an audio driver gets derived from wxTimer.  What we 
>need is an audio API that's actually multi-threaded that we can set priority 
>on and get root priority (or whatever it's called) but will fail gracefully 
>(so root privileges aren't required just to run).
>
>Here's what I've written in the past, anyway, for this:
>
>GUI Thread starts two threads, a file-reading thread and a playback thread.
>
>RingBuffer (stolen from Audacity) used to exchange data between the two 
>threads.
>
>PortMidi should start the playback thread for us, so we just need a thread to 
>handle reading the file (or to store an internal temporary copy of the file 
>separate from the GUI--we don't want to have to poll the GUI for this stuff, 
>and we do want the GUI to be responsive during playback).
>
>Dave
>
>  
>
>>Cheers
>>/Joakim
>>
>>Patrick Earl wrote:
>>    
>>
>>>Well, in taking too long of a break from my real work, I installed the
>>>mingw32 cross-compiler.  After dos2unixing all of wxWidgets'
>>>configure type scripts, I have the wxWindows library compiling on my
>>>box.
>>>
>>>The next step will be compiling Jazz with the windows compiler and
>>>library and seeing what happens.  Right now, there are problems with
>>>the dependency on ALSA.  We'll need to at least start the conversion
>>>to portmidi to make things compile.  It's probably a good idea to
>>>make sure things compile under windows as we go.  Ensures that we
>>>don't end up with a super mess later on.
>>>
>>>For informational purposes, here's the rough steps I followed on my
>>>debian box:
>>>
>>>1.  Installed the three mingw32 packages.
>>>2.  Extracted the wxMSW source.
>>>3.  Converted all the configure.in files and the other files in the
>>>top level dir to unix format.
>>>4.  Ran autoconf in all of the dirs with configure.in files.
>>>5.  Did this:
>>>       ./configure --with-msw --disable-shared
>>>--host=i586-mingw32msvc --prefix=/home/patearl/usr/wxmsw-2.4.2
>>>6.  Ran make
>>>7.  Watched the magic happen.
>>>
>>>       Patrick
>>>
>>>
>>>
>>>-------------------------------------------------------
>>>This SF.Net email is sponsored by: IBM Linux Tutorials
>>>Free Linux tutorial presented by Daniel Robbins, President and CEO of
>>>GenToo technologies. Learn everything from fundamentals to system
>>>administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
>>>_______________________________________________
>>>jazzplusplus-devel mailing list
>>>jaz...@li...
>>>https://lists.sourceforge.net/lists/listinfo/jazzplusplus-devel
>>>      
>>>
>>-------------------------------------------------------
>>This SF.Net email is sponsored by: IBM Linux Tutorials
>>Free Linux tutorial presented by Daniel Robbins, President and CEO of
>>GenToo technologies. Learn everything from fundamentals to system
>>administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
>>_______________________________________________
>>jazzplusplus-devel mailing list
>>jaz...@li...
>>https://lists.sourceforge.net/lists/listinfo/jazzplusplus-devel
>>    
>>
>
>  
>