From a172783cd05ff6f6fd90fea95aed59f0b6ea4ebc Mon Sep 17 00:00:00 2001
From: Vesa <contact.diizy@nbl.fi>
Date: Fri, 13 Jun 2014 12:01:15 +0300
Subject: [PATCH] 3-in-1 bugfix special Fixes bugs: #568, #289 and the
 incorrect timing for midi-noteoffs (see mailing list)

---
 include/NotePlayHandle.h    |  3 ++-
 src/core/NotePlayHandle.cpp | 34 ++++++++++++++++++++++++++--------
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/include/NotePlayHandle.h b/include/NotePlayHandle.h
index d2a5170b7..c564b1fc8 100644
--- a/include/NotePlayHandle.h
+++ b/include/NotePlayHandle.h
@@ -94,7 +94,7 @@ public:
 	/*! Returns whether playback of note is finished and thus handle can be deleted */
 	virtual bool isFinished() const
 	{
-		return m_released && framesLeft() <= 0;
+		return m_released && framesLeft() <= 0 && m_scheduledNoteOff < 0;
 	}
 
 	/*! Returns number of frames left for playback */
@@ -264,6 +264,7 @@ private:
 											// played after release
 	f_cnt_t m_releaseFramesDone;			// number of frames done after
 											// release of note
+	f_cnt_t m_scheduledNoteOff;			// variable for scheduling noteoff at next period
 	NotePlayHandleList m_subNotes;			// used for chords and arpeggios
 	volatile bool m_released;				// indicates whether note is released
 	bool m_hasParent;
diff --git a/src/core/NotePlayHandle.cpp b/src/core/NotePlayHandle.cpp
index db535474a..6c1b2f874 100644
--- a/src/core/NotePlayHandle.cpp
+++ b/src/core/NotePlayHandle.cpp
@@ -61,6 +61,7 @@ NotePlayHandle::NotePlayHandle( InstrumentTrack* instrumentTrack,
 	m_framesBeforeRelease( 0 ),
 	m_releaseFramesToDo( 0 ),
 	m_releaseFramesDone( 0 ),
+	m_scheduledNoteOff( -1 ),
 	m_released( false ),
 	m_hasParent( parent != NULL  ),
 	m_hadChildren( false ),
@@ -100,7 +101,7 @@ NotePlayHandle::NotePlayHandle( InstrumentTrack* instrumentTrack,
 		m_instrumentTrack->midiNoteOn( *this );
 	}
 
-	if( !isMasterNote() || !instrumentTrack->isArpeggioEnabled() )
+	if( hasParent() || !instrumentTrack->isArpeggioEnabled() )
 	{
 		const int baseVelocity = m_instrumentTrack->midiPort()->baseVelocity();
 
@@ -182,6 +183,15 @@ int NotePlayHandle::midiKey() const
 
 void NotePlayHandle::play( sampleFrame * _working_buffer )
 {
+	if( m_scheduledNoteOff >= 0 ) // always trigger scheduled noteoffs, because they're only scheduled if the note is released
+	{
+		m_instrumentTrack->processOutEvent(
+			MidiEvent( MidiNoteOff, midiChannel(), midiKey(), 0 ),
+			MidiTime::fromFrames( m_scheduledNoteOff, engine::framesPerTick() ), 
+			m_scheduledNoteOff );
+		m_scheduledNoteOff = -1;
+	}
+	
 	if( m_muted )
 	{
 		return;
@@ -289,9 +299,9 @@ f_cnt_t NotePlayHandle::framesLeft() const
 	{
 		return m_framesBeforeRelease;
 	}
-	else if( m_released && actualReleaseFramesToDo() >= m_releaseFramesDone )
+	else if( m_released )
 	{
-		return m_framesBeforeRelease + actualReleaseFramesToDo() - m_releaseFramesDone;
+		return m_framesBeforeRelease + m_releaseFramesToDo - m_releaseFramesDone;
 	}
 	return m_frames+actualReleaseFramesToDo()-m_totalFramesPlayed;
 }
@@ -330,15 +340,23 @@ void NotePlayHandle::noteOff( const f_cnt_t _s )
 
 	// then set some variables indicating release-state
 	m_framesBeforeRelease = _s;
-	m_releaseFramesToDo = qMax<f_cnt_t>( 0, m_instrumentTrack->m_soundShaping.releaseFrames() );
+	m_releaseFramesToDo = qMax<f_cnt_t>( 0, actualReleaseFramesToDo() );
 
 	if( hasParent() || !instrumentTrack()->isArpeggioEnabled() )
 	{
 		// send MidiNoteOff event
-		m_instrumentTrack->processOutEvent(
-			MidiEvent( MidiNoteOff, midiChannel(), midiKey(), 0 ),
-			MidiTime::fromFrames( m_framesBeforeRelease, engine::framesPerTick() ), 
-			_s );
+		f_cnt_t realOffset = offset() + _s; // get actual frameoffset of release, in global time
+		if( realOffset < engine::mixer()->framesPerPeriod() ) // if release happens during this period, trigger midievent
+		{
+			m_instrumentTrack->processOutEvent(
+				MidiEvent( MidiNoteOff, midiChannel(), midiKey(), 0 ),
+				MidiTime::fromFrames( realOffset, engine::framesPerTick() ), 
+				realOffset );
+		}
+		else // if release flows over to next period, use m_scheduledNoteOff to trigger it later
+		{
+			m_scheduledNoteOff = realOffset - engine::mixer()->framesPerPeriod();
+		}
 	}
 
 	// inform attached components about MIDI finished (used for recording in Piano Roll)