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Re: [Denemo-devel] The 0.8.12 release

From: Richard Shann
Subject: Re: [Denemo-devel] The 0.8.12 release
Date: Tue, 22 Dec 2009 08:04:21 +0000

I've added the ability to add ports/devices via prefs dialog.
A few other points
      * only playback via jack is wired up, not the immediate playback
        of notes when entered, scripted midi events etc
      * no remove yet via prefs dialog, despite appearances.

I've also quietened the debug chatter, as I have some confidence now in
it - I have had several staffs playing on different clients and ports
for dozens of measures.

On Mon, 2009-12-21 at 22:19 +0000, Richard Shann wrote:
> On Mon, 2009-12-21 at 11:31 +0000, Richard Shann wrote:
> > On Sun, 2009-12-20 at 23:30 -0600, Jeremiah Benham wrote:
> > > es in the first tab that is opened in the preferences there is a
> > > drop  
> > > down for selection of portaudio, fluidsynth, or Jack. These do not
> > > get  
> > > saved and/or reloaded on restarting Jack. If a user only wanted to
> > > use  
> > > Jack audio out but wanted to leave the option open to use fluidsynth  
> > > then it would be anoying for that user to have to select this every  
> > > time. I can probably fix this easily. I will do that tommorow.
> > 
> > ok, but leave the jack ports/clients stuff. I can see what needs doing,
> > it is quite deep structural changes needed. 
> After many hours I have the basic structure in place. Note that you
> cannot set the clients/ports using the Preferences dialog you have to
> write them by hand into denemorc. They look like this (This would come
> after <Config> in denemorc)
>     <midi-devices>
>       <device client="dmmemo">
>         <ports>
>           <port>midi_out</port>
>           <port>midi_uut</port>
>         </ports>
>       </device>
>       <device client="dxmmemo">
>         <ports>
>           <port>mxidi_out</port>
>           <port>mxidi_uut</port>
>         </ports>
>       </device>
>     </midi-devices>
> where the strings "demmemo" "midd_uut" etc are just random names I put
> in for testing. This example has two clients with two ports each.
> There is a very large amount of commented out code (well #if0'd
> actually).
> And the job of generating new clients/ports is not completely trivial -
> it will involve realloc'ing arrays.
> But, it is ready for testing - I have seen it working, though sometimes
> qsynth was receiving data but I heard nothing (I have alsa bridge in
> there).
> Jeremiah - you will want to know roughly what I have done:
>       the basic problem is that a single global buffer for midi events
> queueing to get out will not work. This is because you do not know which
> client will request more events next. The solution I have used is
> slightly odd, because the buffering is attached to the Denemo.prefs
> structure ultimately, but it helps not to have multiple copies of the
> client/port lists (these lists are intended to be basically fixed for a
> normal use of the program). I have left the choice of the client and
> port numbers entirely up to the order in which the names are entered
> into the denemorc, so they no longer appear in the name strings (see
> above).
> Richard
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