Add support for SFZ seq_position opcode

module/SFZero/SFZero/SFZReader.cpp

@@ -230,6 +230,10 @@ void SFZReader::read(const char* text, unsigned int length)
 						buildingRegion->loop_start = (unsigned long) value.getLargeIntValue();
 					else if (opcode == "loop_end" || opcode == "loopend")
 						buildingRegion->loop_end = (unsigned long) value.getLargeIntValue();
+					else if (opcode == "seq_length")
+						buildingRegion->seq_length = value.getIntValue();
+					else if (opcode == "seq_position")
+						buildingRegion->seq_position = value.getIntValue();
 					else if (opcode == "transpose")
 						buildingRegion->transpose = value.getIntValue();
 					else if (opcode == "tune")

module/SFZero/SFZero/SFZRegion.cpp

@@ -68,6 +68,9 @@ void SFZRegion::clear()
 	ampeg_veltrack.clearMod();
 	modeg.clear();
 	initialFilterFc = 0x7FFF;
+	seq_length = 1;
+	seq_position = 1;
+	seq_count = 1; // seq_count counts from 1 <= seq_length
 }
 
 
@@ -170,6 +173,10 @@ void SFZRegion::sf2ToSFZ()
 		initialFilterQ = 0;
 }
 
+void SFZRegion::incrementSeqCount()
+{
+	seq_count = (seq_count % seq_length) + 1;
+}
 
 void SFZRegion::dump()
 {

module/SFZero/SFZero/SFZRegion.h

@@ -3,6 +3,8 @@
 
 #include <math.h>
 
+#include "SFZDebug.h"
+
 namespace SFZero {
 
 class SFZSample;
@@ -39,14 +41,21 @@ class SFZRegion {
 		void	addForSF2(SFZRegion* other);
 		void	sf2ToSFZ();
 		void	dump();
+		void 	incrementSeqCount();
 
-		bool	matches(unsigned char note, unsigned char velocity, Trigger _trigger) {
-			return
+		bool	matches(unsigned char note, unsigned char velocity, Trigger _trigger, bool use_seq_count = false) {
+			bool match =
 				note >= lokey && note <= hikey &&
 				velocity >= lovel && velocity <= hivel &&
 				(_trigger == trigger ||
 				 (trigger == attack && (_trigger == first || _trigger == legato)));
-			}
+
+			if (match && use_seq_count) {
+				if (seq_count != seq_position) match = false;
+				incrementSeqCount();
+				}
+			return match;
+		}
 
 		SFZSample* sample;
 		unsigned char lokey, hikey;
@@ -64,6 +73,7 @@ class SFZRegion {
 		int tune;
 		int pitch_keycenter, pitch_keytrack;
 		int bend_up, bend_down;
+		int seq_length, seq_position;
 
 		float volume, pan;
 		float amp_veltrack;
@@ -79,6 +89,9 @@ class SFZRegion {
 		static inline double timecents2Secs(double timecents) { return pow(2.0, timecents / 1200.0); }
 		static inline float timecents2Secs(float timecents) { return powf(2.0f, timecents / 1200.0f); }
 		static inline float cents2Hertz(float cents) { return 8.176f * powf(2.0f, cents / 1200.0f); }
+
+	private:
+		int seq_count;
 	};
 
 }

module/SFZero/SFZero/SFZSynth.cpp

@@ -65,7 +65,7 @@ void SFZSynth::noteOn(int midiChannel, int midiNoteNumber, float velocity)
 		int numRegions = sound->getNumRegions();
 		for (i = 0; i < numRegions; ++i) {
 			SFZRegion* region = sound->regionAt(i);
-			if (region->matches((unsigned char)midiNoteNumber, (unsigned char)midiVelocity, trigger)) {
+			if (region->matches((unsigned char)midiNoteNumber, (unsigned char)midiVelocity, trigger, true)) {
 				SFZVoice* voice =
 					dynamic_cast<SFZVoice*>(
 						findFreeVoice(