Re: [jazzplusplus-devel] Cross-Compiling

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On Wednesday 31 March 2004 09:17 am, Joakim Verona wrote:
> 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.

Hmm, I wouldn't mind supporting Alsa and OSS separate from PortMidi, but I 
really really really think that those drivers should be rewritten to a new 
system along with the PortMidi thing.  ;)

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

It's real easy, really.  ;)  I'm about to take a crack at a new preferences 
dialog, and then maybe I'll put a portmidi driver on my todo list after I 
finish the selection stuff, if nobody gets to it first.

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

(Yes, I was)  :)

Dave

> /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
> >>>
> >>>
> >>>
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