On 01/09/2012 04:00 PM, Rui Nuno Capela wrote:
applied. qtractor svn trunk rev.2659 (v0.5.3.4)
Thanks a bunch. :) Attached is another suggested patch against the
current trunk (r2660) to make qtractor send an MMC locate after jumping
back to the beginning of a loop. It's not perfect, but I'm posting it
anyway in case someone may find it useful.
As you can see I handled this in the timer callback of the main form
which isn't 100% accurate, but I never found it to be off by more than 1
frame, which I guess is good enough for my purposes. There are surely
better ways to do this, but I wasn't able to figure that out without
investing much more time reading the source code. Ideally, this should
be handled on the spot somewhere in the MIDI engine. I tried to add it
directly in qtractorMidiOutputThread::process(), but the read-ahead gets
in the way there, so I couldn't find a proper way to make that work. (Is
there a way in qtractor to schedule a callback exactly at the *real*
time when the play head reaches a given position? Then this would be easy.)
There are a few other situations where an MMC locate is still missing,
specifically after ending a rewind or fast-forward, but I have no idea
how to fix this without diving into the qtractor sources much more than
I did. :(
Cheers,
Albert
--
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email: [email protected], [email protected]
WWW: http://www.musikinformatik.uni-mainz.de/ag
Index: src/qtractorMainForm.cpp
===================================================================
--- src/qtractorMainForm.cpp (revision 2660)
+++ src/qtractorMainForm.cpp (working copy)
@@ -6167,6 +6167,7 @@
// Currrent state...
bool bPlaying = m_pSession->isPlaying();
long iPlayHead = long(m_pSession->playHead());
+ bool bRelocate = iPlayHead < (long)m_iPlayHead;
qtractorAudioEngine *pAudioEngine = m_pSession->audioEngine();
qtractorMidiEngine *pMidiEngine = m_pSession->midiEngine();
@@ -6194,6 +6195,10 @@
m_pSession->songPosFromFrame(iPlayHead));
}
}
+ else if (bRelocate) {
+ // MMC locate for loop start - ag
+ pMidiEngine->sendMmcLocate(m_pSession->locateFromFrame(iPlayHead));
+ }
}
// Transport status...
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