From 3a90e8344192e60f65cf9a1fe821bb080a323d34 Mon Sep 17 00:00:00 2001
From: Mick Grierson <mickgrierson@strangebook.lan>
Date: Sun, 16 Oct 2011 23:00:42 +0100
Subject: added maxiDyn compressor and gate

---
 main.cpp       | 31 ++++++++++++++---------------
 maximilian.cpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 maximilian.h   | 18 +++++++++++++++++
 3 files changed, 95 insertions(+), 16 deletions(-)

diff --git a/main.cpp b/main.cpp
index ff2122d..70803aa 100755
--- a/main.cpp
+++ b/main.cpp
@@ -1,27 +1,26 @@
 #include "maximilian.h"
 
+maxiSample beats;//We give our sample a name. It's called beats this time. We could have loads of them, but they have to have different names.
+maxiDyn compressor;
+double beat;
 
-maxiOsc timer;//this is the metronome
-int currentCount,lastCount,blob;//these values are used to check if we have a new beat this sample
 
 void setup() {//some inits
-	//nothing to go here this time	
 	
-	blob=0;
+	beats.load("/Users/mickgrierson/Documents/audio/59210__suonho__abstract_electrofunkbreakbeats_124bpm_mono.wav");//load in your samples. Provide the full path to a wav file.
+	printf("Summary:\n%s", beats.getSummary());//get info on samples if you like.
+	
 }
 
-void play(double *output) {
+void play(double *output) {//this is where the magic happens. Very slow magic.
 	
+	beat=beats.play();//just play the file. Looping is default for all play functions.
+	*output=compressor.compress(beat,100,0.01)*10;//OMG an evil compressor
+
+	//	*output=beats.play(0.69);//play the file with a speed setting. 1. is normal speed.
+	//	*output=beats.play(0.5,0,44100);//linear interpolationplay with a frequency input, start point and end point. Useful for syncing.
+	//	*output=beats.play4(0.5,0,44100);//cubic interpolation play with a frequency input, start point and end point. Useful for syncing.
 	
-	currentCount=(int)timer.phasor(1000);//this sets up a metronome that ticks every 2 seconds
 	
-	if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound
-				
-		cout << "tick\n";//the clock ticks
-		blob++;
-		cout << blob;
-		cout << "\n";
-		lastCount=0;//set lastCount to 0
-	}
-		
-}
\ No newline at end of file
+}
+
diff --git a/maximilian.cpp b/maximilian.cpp
index 0c016b1..1b93489 100644
--- a/maximilian.cpp
+++ b/maximilian.cpp
@@ -820,4 +820,66 @@ void maxiSample::getLength() {
 	length=myDataSize*0.5;	
 }
 
+/* This is a basic compressor. Can also do expansion. It takes standard args for ratio and threshold
+ although threshold is in linear amplitude at the moment. It has some crotchety old excuse for gain compensation
+ which will do for now, but if you do choose to use it for expansion, watch out as it will bite you in the bum*/
+
+double maxiDyn::compress(double input, double ratio, double threshold) {
+	
+	if (fabs(input)>threshold) {
+		if (input>0.) {
+			output = 1-threshold+(((input-threshold)/ratio)+threshold);
+		} else {
+			output = 1-threshold+(((input+threshold)/ratio)-threshold);
+		}
+
+	}
+	
+	else {
+		output=input+(1-threshold);
+	}
+	return output;
+}
+
+/*reasonably happy with this. input is the input signal to gate, threshold is the threshold of the gate (default 0.9),
+ hold is how long you want to hold after the attack finishes (default 1 sample). The envelopes are old school digital.
+ An attack of 1 is instant (default). An attack of 0.0015 is a few hundred ms. Likewise, a release 
+ of 0. is instant and a release of 0.9995 (default) is a few hundred ms. When I can be arsed I'll work out
+ what this ends up as in seconds and do the conversion. I may never be arsed. It seems a waste. */
+double maxiDyn::gate(double input, double threshold, long hold, double attack, double release) {
+		
+	if (fabs(input)>threshold && attackphase!=1){ 
+		holdcount=0;
+		releasephase=0;
+		attackphase=1;
+		amplitude=0;
+	}
+	
+	if (attackphase==1 && amplitude<1) {
+		amplitude+=(1*attack);
+		output=input*amplitude;
+	}
+	
+	if (amplitude>=1) {
+		attackphase=0;
+		holdphase=1;
+	}
+	
+	if (holdcount<hold && holdphase==1) {
+		output=input;
+		holdcount++;
+	}
+	
+	if (holdcount==hold) {
+		holdphase=0;
+		releasephase=1;
+	}
+	
+	if (releasephase==1 && amplitude>0.) {
+		output=input*(amplitude*=release);
+
+	}
+	
+	return output;
+}
 
diff --git a/maximilian.h b/maximilian.h
index 41df487..38ac3dc 100755
--- a/maximilian.h
+++ b/maximilian.h
@@ -314,4 +314,22 @@ public:
 };
 
 
+class maxiDyn {
+
+	
+public:
+	double gate(double input, double threshold=0.9, long hold=1, double attack=1, double release=0.9995);
+	double compress(double input, double ratio=2.0, double threshold=0.5);
+	double input;
+	double ratio;
+	double threshold;
+	double output;
+	long attack;
+	long release;
+	double amplitude;
+	long hold;
+	long holdcount;
+	int attackphase,holdphase,releasephase;
+};
+
 #endif
-- 
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