- evaluate MidiClock

git-svn-id: http://moon:8086/svn/software/trunk/projects/JaySynth@269 b431acfa-c32f-4a4a-93f1-934dc6c82436
2015-03-20 16:35:58 +00:00
parent 13adfc4ddd
commit 210833df74
18 changed files with 1826 additions and 1640 deletions
@@ -0,0 +1,73 @@
+/*
+ 
+ //#######################################################################################
+ //Class to insert Midiclock messages into a given MidiBuffer, suitable for block
+ //based audio callbacks. The class can act on position jumps e.g. "Loops" by sending a 
+ //positioning message.
+ //NOTE: No ballistik came in to play so I wouldn't recommend using it to drive a mechanical
+ //tape deck!!!
+ //
+ //solar3d-software, April- 10- 2012
+ //#######################################################################################
+ 
+ */
+#ifndef __JK_MIDICLOCK
+#define __JK_MIDICLOCK
+
+#include "../JuceLibraryCode/JuceHeader.h"
+
+//#include "Includes.h"
+
+class JK_MidiClock
+{
+public:
+    JK_MidiClock();
+    
+	void setPositionJumpThreshold(const double ms)						{posChangeThreshold = ms / 1000.0;}
+	double getPositionJumpThreshold()									{return posChangeThreshold;}
+    void setFollowSongPosition(const bool shouldFollow)                 {followSongPosition = shouldFollow;}
+	bool getFollowSongPosition()										{return followSongPosition;}
+    void setOffset(const int offset)                                    {ppqOffset = offset;}
+    int  getOffset()                                                    {return ppqOffset;}
+    
+    void generateMidiclock(AudioPlayHead::CurrentPositionInfo &lastPosInfo,
+                           MidiBuffer* midiBuffer,
+                           const int bufferSize,
+                           const double sampleRate);
+    
+    //=================================================================================================
+    juce_UseDebuggingNewOperator
+    
+private:
+    inline int64 roundToInt64 (const double val) noexcept
+	{
+		return (val - floor(val) >= 0.5) ? (int64)(ceil(val)) : (int64)(floor(val));
+	}
+	
+	
+	bool   wasPlaying;
+	double syncPpqPosition;
+	double posChangeThreshold;
+    double ppqToStartSyncAt;
+    bool   followSongPosition;   
+	uint8  syncFlag;
+    int    ppqOffset;
+	
+    static const int cycleEnd_   = 1;
+    static const int startSlave_ = 2;
+	
+	ScopedPointer <MidiMessage> clockMessage;
+	ScopedPointer <MidiMessage> continueMessage;
+	ScopedPointer <MidiMessage> stopMessage;
+	ScopedPointer <MidiMessage> songPositionMessage;
+    
+	void sendSongPositionPointerMessage(const double ppqPosition, const int posInBuffer, MidiBuffer* buffer);
+    
+	bool positionJumped(const double lastPosInPPQ, const double currentPosInPPQ, 
+                        const double sampleRate, const double ppqPerSample);
+    
+	double getNearestSixteenthInPPQ(const double ppqPosition)  	           {return ceil(ppqPosition * 4.0) / 4.0;}
+    
+	JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(JK_MidiClock);
+};
+#endif