From f9203782e20ce3754b872baa3cd5dd59890a8ad4 Mon Sep 17 00:00:00 2001
From: Edouard DUPIN <yui.heero@gmail.com>
Date: Fri, 3 Apr 2015 23:05:09 +0200
Subject: [PATCH] [DEV] basic set of input function with _

---
 audio/algo/chunkware/AttRelEnvelope.cpp   | 20 +++----
 audio/algo/chunkware/AttRelEnvelope.h     | 27 +++++-----
 audio/algo/chunkware/Compressor.cpp       | 32 ++++++------
 audio/algo/chunkware/Compressor.h         | 10 ++--
 audio/algo/chunkware/CompressorRms.cpp    | 18 +++----
 audio/algo/chunkware/CompressorRms.h      | 16 +++---
 audio/algo/chunkware/EnvelopeDetector.cpp | 22 ++++----
 audio/algo/chunkware/EnvelopeDetector.h   | 18 +++----
 audio/algo/chunkware/Gain.h               | 11 ++--
 audio/algo/chunkware/Gate.cpp             | 26 ++++-----
 audio/algo/chunkware/Gate.h               |  6 +--
 audio/algo/chunkware/GateRms.cpp          | 64 +++++++++++++++++++++++
 audio/algo/chunkware/GateRms.h            | 58 ++++++++++++++++++++
 audio/algo/chunkware/Limiter.cpp          | 40 +++++++-------
 audio/algo/chunkware/Limiter.h            | 23 ++++----
 15 files changed, 250 insertions(+), 141 deletions(-)
 create mode 100644 audio/algo/chunkware/GateRms.cpp
 create mode 100644 audio/algo/chunkware/GateRms.h

diff --git a/audio/algo/chunkware/AttRelEnvelope.cpp b/audio/algo/chunkware/AttRelEnvelope.cpp
index c4fcf56..6cb5b72 100644
--- a/audio/algo/chunkware/AttRelEnvelope.cpp
+++ b/audio/algo/chunkware/AttRelEnvelope.cpp
@@ -26,25 +26,25 @@
 
 #include <audio/algo/chunkware/AttRelEnvelope.h>
 
-audio::algo::chunkware::AttRelEnvelope::AttRelEnvelope(double m_attackms, double m_releasems, double sampleRate) :
-  m_attack(m_attackms, sampleRate),
-  m_release(m_releasems, sampleRate) {
+audio::algo::chunkware::AttRelEnvelope::AttRelEnvelope(double _attackms, double _releasems, double _sampleRate) :
+  m_attack(_attackms, _sampleRate),
+  m_release(_releasems, _sampleRate) {
 	
 }
 
 //-------------------------------------------------------------
-void audio::algo::chunkware::AttRelEnvelope::setAttack(double ms) {
-	m_attack.setTc(ms);
+void audio::algo::chunkware::AttRelEnvelope::setAttack(double _ms) {
+	m_attack.setTc(_ms);
 }
 
 //-------------------------------------------------------------
-void audio::algo::chunkware::AttRelEnvelope::setRelease(double ms) {
-	m_release.setTc(ms);
+void audio::algo::chunkware::AttRelEnvelope::setRelease(double _ms) {
+	m_release.setTc(_ms);
 }
 
 //-------------------------------------------------------------
-void audio::algo::chunkware::AttRelEnvelope::setSampleRate(double sampleRate) {
-	m_attack.setSampleRate(sampleRate);
-	m_release.setSampleRate(sampleRate);
+void audio::algo::chunkware::AttRelEnvelope::setSampleRate(double _sampleRate) {
+	m_attack.setSampleRate(_sampleRate);
+	m_release.setSampleRate(_sampleRate);
 }
 
diff --git a/audio/algo/chunkware/AttRelEnvelope.h b/audio/algo/chunkware/AttRelEnvelope.h
index 88c0f66..406b957 100644
--- a/audio/algo/chunkware/AttRelEnvelope.h
+++ b/audio/algo/chunkware/AttRelEnvelope.h
@@ -32,48 +32,45 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			//-------------------------------------------------------------
-			// attack/release envelope
-			//-------------------------------------------------------------
 			class AttRelEnvelope {
 				public:
-					AttRelEnvelope(double m_attackms = 10.0,
-					               double m_releasems = 100.0,
-					               double sampleRate = 44100.0);
+					AttRelEnvelope(double _attackms = 10.0,
+					               double _releasems = 100.0,
+					               double _sampleRate = 44100.0);
 					virtual ~AttRelEnvelope() {}
 					// attack time constant
-					virtual void   setAttack(double ms);
+					virtual void setAttack(double _ms);
 					virtual double getAttack() const {
 						return m_attack.getTc();
 					}
 					// release time constant
-					virtual void   setRelease(double ms);
+					virtual void setRelease(double _ms);
 					virtual double getRelease() const {
 						return m_release.getTc();
 					}
 					// sample rate dependencies
-					virtual void   setSampleRate(double sampleRate);
+					virtual void setSampleRate(double _sampleRate);
 					virtual double getSampleRate() const {
 						return m_attack.getSampleRate();
 					}
 					// runtime function
-					void run(double in, double &state) {
+					void run(double _in, double& _state) {
 						/* assumes that:
 						* positive delta = attack
 						* negative delta = release
 						* good for linear & log values
 						*/
-						if (in > state) {
+						if (_in > _state) {
 							// attack
-							m_attack.run(in, state);
+							m_attack.run(_in, _state);
 						} else {
 							// release
-							m_release.run(in, state);
+							m_release.run(_in, _state);
 						}
 					}
 				private:
-					EnvelopeDetector m_attack;
-					EnvelopeDetector m_release;
+					audio::algo::chunkware::EnvelopeDetector m_attack;
+					audio::algo::chunkware::EnvelopeDetector m_release;
 			};
 		}
 	}
diff --git a/audio/algo/chunkware/Compressor.cpp b/audio/algo/chunkware/Compressor.cpp
index 9d91abb..61427a6 100644
--- a/audio/algo/chunkware/Compressor.cpp
+++ b/audio/algo/chunkware/Compressor.cpp
@@ -34,42 +34,42 @@ audio::algo::chunkware::Compresssor::Compresssor() :
 	
 }
 
-void audio::algo::chunkware::Compresssor::setThresh(double dB) {
-	m_threshdB = dB;
+void audio::algo::chunkware::Compresssor::setThresh(double _dB) {
+	m_threshdB = _dB;
 }
 
-void audio::algo::chunkware::Compresssor::setRatio(double ratio) {
-	AA_CHUNK_ASSERT(ratio > 0.0, "input function error");
-	m_ratio = ratio;
+void audio::algo::chunkware::Compresssor::setRatio(double _ratio) {
+	AA_CHUNK_ASSERT(_ratio > 0.0, "input function error");
+	m_ratio = _ratio;
 }
 
 void audio::algo::chunkware::Compresssor::initRuntime() {
 	m_overThresholdEnvelopeDB = DC_OFFSET;
 }
 
-void audio::algo::chunkware::Compresssor::process(double &in1, double &in2) {
+void audio::algo::chunkware::Compresssor::process(double& _in1, double& _in2) {
 	// create sidechain
-	double rect1 = fabs(in1);	// rectify input
-	double rect2 = fabs(in2);
+	double rect1 = fabs(_in1);	// rectify input
+	double rect2 = fabs(_in2);
 	/* if desired, one could use another EnvelopeDetector to smooth
 	 * the rectified signal.
 	 */
 	double link = std::max(rect1, rect2);	// link channels with greater of 2
-	process(in1, in2, link);	// rest of process
+	process(_in1, _in2, link);	// rest of process
 }
 
-void audio::algo::chunkware::Compresssor::process(double &in1, double &in2, double keyLinked) {
-	keyLinked = fabs(keyLinked);		// rectify (just in case)
+void audio::algo::chunkware::Compresssor::process(double& _in1, double& _in2, double _keyLinked) {
+	_keyLinked = fabs(_keyLinked);		// rectify (just in case)
 	// convert key to dB
-	keyLinked += DC_OFFSET;				// add DC offset to avoid log(0)
-	double keydB = lin2dB(keyLinked);	// convert linear -> dB
+	_keyLinked += DC_OFFSET;				// add DC offset to avoid log(0)
+	double keydB = lin2dB(_keyLinked);	// convert linear -> dB
 	// threshold
 	double overdB = keydB - m_threshdB;	// delta over threshold
 	if (overdB < 0.0)
 		overdB = 0.0;
 	// attack/release
 	overdB += DC_OFFSET; // add DC offset to avoid denormal
-	AttRelEnvelope::run(overdB, m_overThresholdEnvelopeDB); // run attack/release envelope
+	audio::algo::chunkware::AttRelEnvelope::run(overdB, m_overThresholdEnvelopeDB); // run attack/release envelope
 	overdB = m_overThresholdEnvelopeDB - DC_OFFSET; // subtract DC offset
 	/* REGARDING THE DC OFFSET: In this case, since the offset is added before 
 	 * the attack/release processes, the envelope will never fall below the offset,
@@ -81,7 +81,7 @@ void audio::algo::chunkware::Compresssor::process(double &in1, double &in2, doub
 	double gr = overdB * (m_ratio - 1.0);	// gain reduction (dB)
 	gr = dB2lin(gr);						// convert dB -> linear
 	// output gain
-	in1 *= gr;	// apply gain reduction to input
-	in2 *= gr;
+	_in1 *= gr;	// apply gain reduction to input
+	_in2 *= gr;
 }
 
diff --git a/audio/algo/chunkware/Compressor.h b/audio/algo/chunkware/Compressor.h
index caea383..3116a92 100644
--- a/audio/algo/chunkware/Compressor.h
+++ b/audio/algo/chunkware/Compressor.h
@@ -34,13 +34,13 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			class Compresssor : public AttRelEnvelope {
+			class Compresssor : public audio::algo::chunkware::AttRelEnvelope {
 				public:
 					Compresssor();
 					virtual ~Compresssor() {}
 					// parameters
-					virtual void setThresh(double dB);
-					virtual void setRatio(double dB);
+					virtual void setThresh(double _dB);
+					virtual void setRatio(double _dB);
 					virtual double getThresh() const {
 						return m_threshdB;
 					}
@@ -51,9 +51,9 @@ namespace audio {
 					// call before runtime (in resume())
 					virtual void initRuntime();
 					// compressor runtime process
-					void process(double &in1, double &in2);
+					void process(double& _in1, double& _in2);
 					// with stereo-linked key in
-					void process(double &in1, double &in2, double keyLinked);
+					void process(double& _in1, double& _in2, double _keyLinked);
 				private:
 					// transfer function
 					double m_threshdB;//!< threshold (dB)
diff --git a/audio/algo/chunkware/CompressorRms.cpp b/audio/algo/chunkware/CompressorRms.cpp
index 7ff826c..8fee480 100644
--- a/audio/algo/chunkware/CompressorRms.cpp
+++ b/audio/algo/chunkware/CompressorRms.cpp
@@ -33,13 +33,13 @@ audio::algo::chunkware::CompresssorRms::CompresssorRms() :
 	
 }
 
-void audio::algo::chunkware::CompresssorRms::setSampleRate(double sampleRate) {
-	audio::algo::chunkware::Compresssor::setSampleRate(sampleRate);
-	m_averager.setSampleRate(sampleRate);
+void audio::algo::chunkware::CompresssorRms::setSampleRate(double _sampleRate) {
+	audio::algo::chunkware::Compresssor::setSampleRate(_sampleRate);
+	m_averager.setSampleRate(_sampleRate);
 }
 
-void audio::algo::chunkware::CompresssorRms::setWindow(double ms) {
-	m_averager.setTc(ms);
+void audio::algo::chunkware::CompresssorRms::setWindow(double _ms) {
+	m_averager.setTc(_ms);
 }
 
 void audio::algo::chunkware::CompresssorRms::initRuntime() {
@@ -47,10 +47,10 @@ void audio::algo::chunkware::CompresssorRms::initRuntime() {
 	m_averageSuares = DC_OFFSET;
 }
 
-void audio::algo::chunkware::CompresssorRms::process(double &in1, double &in2) {
+void audio::algo::chunkware::CompresssorRms::process(double& _in1, double& _in2) {
 	// create sidechain
-	double inSq1 = in1 * in1;	// square input
-	double inSq2 = in2 * in2;
+	double inSq1 = _in1 * _in1;	// square input
+	double inSq2 = _in2 * _in2;
 	double sum = inSq1 + inSq2; // power summing
 	sum += DC_OFFSET; // DC offset, to prevent denormal
 	m_averager.run(sum, m_averageSuares); // average of squares
@@ -62,5 +62,5 @@ void audio::algo::chunkware::CompresssorRms::process(double &in1, double &in2) {
 	 * giving comparable results.
 	 */
 	// rest of process
-	Compresssor::process(in1, in2, rms);
+	audio::algo::chunkware::Compresssor::process(_in1, _in2, rms);
 }
diff --git a/audio/algo/chunkware/CompressorRms.h b/audio/algo/chunkware/CompressorRms.h
index 0daffd9..d957699 100644
--- a/audio/algo/chunkware/CompressorRms.h
+++ b/audio/algo/chunkware/CompressorRms.h
@@ -32,20 +32,22 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			class CompresssorRms : public Compresssor {
+			class CompresssorRms : public audio::algo::chunkware::Compresssor {
 				public:
 					CompresssorRms();
 					virtual ~CompresssorRms() {}
 					// sample rate
-					virtual void setSampleRate(double sampleRate);
+					virtual void setSampleRate(double _sampleRate);
 					// RMS window
-					virtual void setWindow(double ms);
-					virtual double getWindow() const { return m_averager.getTc(); }
+					virtual void setWindow(double _ms);
+					virtual double getWindow() const {
+						return m_averager.getTc();
+					}
 					// runtime process
-					virtual void initRuntime();			// call before runtime (in resume())
-					void process(double &in1, double &in2);	// compressor runtime process
+					virtual void initRuntime(); // call before runtime (in resume())
+					void process(double& _in1, double& _in2); // compressor runtime process
 				protected:
-					EnvelopeDetector m_averager; //!< averager
+					audio::algo::chunkware::EnvelopeDetector m_averager; //!< averager
 					double m_averageSuares; //!< average of squares
 			};
 		}
diff --git a/audio/algo/chunkware/EnvelopeDetector.cpp b/audio/algo/chunkware/EnvelopeDetector.cpp
index 088d27a..6b6663a 100644
--- a/audio/algo/chunkware/EnvelopeDetector.cpp
+++ b/audio/algo/chunkware/EnvelopeDetector.cpp
@@ -27,23 +27,23 @@
 #include <audio/algo/chunkware/debug.h>
 #include <audio/algo/chunkware/EnvelopeDetector.h>
 
-audio::algo::chunkware::EnvelopeDetector::EnvelopeDetector(double ms, double sampleRate) {
-	AA_CHUNK_ASSERT(sampleRate > 0.0, "input function error");
-	AA_CHUNK_ASSERT(ms > 0.0, "input function error");
-	m_sampleRate = sampleRate;
-	m_timeMs = ms;
+audio::algo::chunkware::EnvelopeDetector::EnvelopeDetector(double _ms, double _sampleRate) {
+	AA_CHUNK_ASSERT(_sampleRate > 0.0, "input function error");
+	AA_CHUNK_ASSERT(_ms > 0.0, "input function error");
+	m_sampleRate = _sampleRate;
+	m_timeMs = _ms;
 	setCoef();
 }
 
-void audio::algo::chunkware::EnvelopeDetector::setTc(double ms) {
-	AA_CHUNK_ASSERT(ms > 0.0, "input function error");
-	m_timeMs = ms;
+void audio::algo::chunkware::EnvelopeDetector::setTc(double _ms) {
+	AA_CHUNK_ASSERT(_ms > 0.0, "input function error");
+	m_timeMs = _ms;
 	setCoef();
 }
 
-void audio::algo::chunkware::EnvelopeDetector::setSampleRate(double sampleRate) {
-	AA_CHUNK_ASSERT(sampleRate > 0.0, "input function error");
-	m_sampleRate = sampleRate;
+void audio::algo::chunkware::EnvelopeDetector::setSampleRate(double _sampleRate) {
+	AA_CHUNK_ASSERT(_sampleRate > 0.0, "input function error");
+	m_sampleRate = _sampleRate;
 	setCoef();
 }
 
diff --git a/audio/algo/chunkware/EnvelopeDetector.h b/audio/algo/chunkware/EnvelopeDetector.h
index 7031865..08c324c 100644
--- a/audio/algo/chunkware/EnvelopeDetector.h
+++ b/audio/algo/chunkware/EnvelopeDetector.h
@@ -32,34 +32,28 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			//-------------------------------------------------------------
-			// DC offset (to prevent denormal)
-			//-------------------------------------------------------------
 			// USE:
 			// 1. init envelope state to DC_OFFSET before processing
 			// 2. add to input before envelope runtime function
 			static const double DC_OFFSET = 1.0E-25;
-			//-------------------------------------------------------------
-			// envelope detector
-			//-------------------------------------------------------------
 			class EnvelopeDetector {
 				public:
-					EnvelopeDetector(double ms = 1.0,
-					                 double sampleRate = 44100.0);
+					EnvelopeDetector(double _ms = 1.0,
+					                 double _sampleRate = 44100.0);
 					virtual ~EnvelopeDetector() {}
 					// time constant
-					virtual void   setTc(double ms);
+					virtual void setTc(double _ms);
 					virtual double getTc() const {
 						return m_timeMs;
 					}
 					// sample rate
-					virtual void   setSampleRate(double sampleRate);
+					virtual void setSampleRate(double _sampleRate);
 					virtual double getSampleRate() const {
 						return m_sampleRate;
 					}
 					// runtime function
-					void run(double in, double &state) {
-						state = in + m_coefficient * (state - in);
+					void run(double _in, double& _state) {
+						_state = _in + m_coefficient * (_state - _in);
 					}
 				protected:
 					double m_sampleRate; //!< sample rate
diff --git a/audio/algo/chunkware/Gain.h b/audio/algo/chunkware/Gain.h
index bd8039e..503d89e 100644
--- a/audio/algo/chunkware/Gain.h
+++ b/audio/algo/chunkware/Gain.h
@@ -33,18 +33,15 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			//-------------------------------------------------------------
-			// gain functions
-			//-------------------------------------------------------------
 			// linear -> dB conversion
-			static inline double lin2dB(double lin) {
+			static inline double lin2dB(double _lin) {
 				static const double LOG_2_DB = 8.6858896380650365530225783783321;	// 20 / ln(10)
-				return log(lin) * LOG_2_DB;
+				return log(_lin) * LOG_2_DB;
 			}
 			// dB -> linear conversion
-			static inline double dB2lin(double dB) {
+			static inline double dB2lin(double _dB) {
 				static const double DB_2_LOG = 0.11512925464970228420089957273422;	// ln(10) / 20
-				return exp(dB * DB_2_LOG);
+				return exp(_dB * DB_2_LOG);
 			}
 		}
 	}
diff --git a/audio/algo/chunkware/Gate.cpp b/audio/algo/chunkware/Gate.cpp
index 6f3d2aa..3330279 100644
--- a/audio/algo/chunkware/Gate.cpp
+++ b/audio/algo/chunkware/Gate.cpp
@@ -34,9 +34,9 @@ audio::algo::chunkware::Gate::Gate() :
 	
 }
 
-void audio::algo::chunkware::Gate::setThresh(double dB) {
-	m_threshdB = dB;
-	m_threshold = dB2lin(dB);
+void audio::algo::chunkware::Gate::setThresh(double _dB) {
+	m_threshdB = _dB;
+	m_threshold = dB2lin(_dB);
 }
 
 void audio::algo::chunkware::Gate::initRuntime() {
@@ -44,25 +44,25 @@ void audio::algo::chunkware::Gate::initRuntime() {
 }
 
 
-void audio::algo::chunkware::Gate::process(double &in1, double &in2) {
+void audio::algo::chunkware::Gate::process(double& _in1, double& _in2) {
 	// create sidechain
-	double rect1 = fabs(in1);	// rectify input
-	double rect2 = fabs(in2);
+	double rect1 = fabs(_in1);	// rectify input
+	double rect2 = fabs(_in2);
 	/* if desired, one could use another EnvelopeDetector to smooth
 	 * the rectified signal.
 	 */
 	double link = std::max(rect1, rect2);	// link channels with greater of 2
-	process(in1, in2, link);	// rest of process
+	process(_in1, _in2, link);	// rest of process
 }
 
-void audio::algo::chunkware::Gate::process(double &in1, double &in2, double keyLinked) {
-	keyLinked = fabs(keyLinked);	// rectify (just in case)
+void audio::algo::chunkware::Gate::process(double& _in1, double& _in2, double _keyLinked) {
+	_keyLinked = fabs(_keyLinked);	// rectify (just in case)
 	// threshold
 	// key over threshold (0.0 or 1.0)
-	double over = double(keyLinked > m_threshold);
+	double over = double(_keyLinked > m_threshold);
 	// attack/release
 	over += DC_OFFSET;					// add DC offset to avoid denormal
-	AttRelEnvelope::run(over, m_overThresholdEnvelope);	// run attack/release
+	audio::algo::chunkware::AttRelEnvelope::run(over, m_overThresholdEnvelope);	// run attack/release
 	over = m_overThresholdEnvelope - DC_OFFSET;			// subtract DC offset
 	/* REGARDING THE DC OFFSET: In this case, since the offset is added before 
 	 * the attack/release processes, the envelope will never fall below the offset,
@@ -71,6 +71,6 @@ void audio::algo::chunkware::Gate::process(double &in1, double &in2, double keyL
 	 * a minimum value of 0dB.
 	 */
 	// output gain
-	in1 *= over;	// apply gain reduction to input
-	in2 *= over;
+	_in1 *= over;	// apply gain reduction to input
+	_in2 *= over;
 }
diff --git a/audio/algo/chunkware/Gate.h b/audio/algo/chunkware/Gate.h
index 81ff2c1..b2bbffb 100644
--- a/audio/algo/chunkware/Gate.h
+++ b/audio/algo/chunkware/Gate.h
@@ -39,7 +39,7 @@ namespace audio {
 					Gate();
 					virtual ~Gate() {}
 					// parameters
-					virtual void setThresh(double dB);
+					virtual void setThresh(double _dB);
 					virtual double getThresh() const {
 						return m_threshdB;
 					}
@@ -47,9 +47,9 @@ namespace audio {
 					// call before runtime (in resume())
 					virtual void initRuntime();
 					// gate runtime process
-					void process(double &in1, double &in2);
+					void process(double& _in1, double& _in2);
 					// with stereo-linked key in
-					void process(double &in1, double &in2, double keyLinked);
+					void process(double& _in1, double& _in2, double _keyLinked);
 				private:
 					// transfer function
 					double m_threshdB; //!< threshold (dB)
diff --git a/audio/algo/chunkware/GateRms.cpp b/audio/algo/chunkware/GateRms.cpp
new file mode 100644
index 0000000..90635ef
--- /dev/null
+++ b/audio/algo/chunkware/GateRms.cpp
@@ -0,0 +1,64 @@
+/**
+ * @author Bojan MARKOVIC
+ * @author Edouard DUPIN
+ * @copyright 2006, ChunkWare Music Software, OPEN-SOURCE
+ * @license BSD-1 (see license file)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <audio/algo/chunkware/GateRms.h>
+
+audio::algo::chunkware::GateRms::GateRms() :
+  m_averager(5.0),
+  m_averageSuares(DC_OFFSET) {
+	
+}
+
+void audio::algo::chunkware::GateRms::setSampleRate(double _sampleRate) {
+	audio::algo::chunkware::Gate::setSampleRate(_sampleRate);
+	m_averager.setSampleRate(_sampleRate);
+}
+
+void audio::algo::chunkware::GateRms::setWindow(double _ms) {
+	m_averager.setTc(_ms);
+}
+
+void audio::algo::chunkware::GateRms::initRuntime() {
+	audio::algo::chunkware::Gate::initRuntime();
+	m_averageSuares = DC_OFFSET;
+}
+
+void audio::algo::chunkware::GateRms::process(double& _in1, double& _in2) {
+	// create sidechain
+	double inSq1 = _in1 * _in1;	// square input
+	double inSq2 = _in2 * _in2;
+	double sum = inSq1 + inSq2;			// power summing
+	sum += DC_OFFSET;					// DC offset, to prevent denormal
+	m_averager.run(sum, m_averageSuares);		// average of squares
+	double rms = sqrt(m_averageSuares);	// rms (sort of ...)
+	/* REGARDING THE RMS AVERAGER: Ok, so this isn't a REAL RMS
+	 * calculation. A true RMS is an FIR moving average. This
+	 * approximation is a 1-pole IIR. Nonetheless, in practice,
+	 * and in the interest of simplicity, this method will suffice,
+	 * giving comparable results.
+	 */
+	audio::algo::chunkware::Gate::process(_in1, _in2, rms);	// rest of process
+}
diff --git a/audio/algo/chunkware/GateRms.h b/audio/algo/chunkware/GateRms.h
new file mode 100644
index 0000000..d16caa2
--- /dev/null
+++ b/audio/algo/chunkware/GateRms.h
@@ -0,0 +1,58 @@
+/**
+ * @author Bojan MARKOVIC
+ * @author Edouard DUPIN
+ * @copyright 2006, ChunkWare Music Software, OPEN-SOURCE
+ * @license BSD-1 (see license file)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __AUDIO_ALGO_CHUNKWARE_GATE_RMS_H__
+#define __AUDIO_ALGO_CHUNKWARE_GATE_RMS_H__
+
+#include <audio/algo/chunkware/Gate.h>
+
+namespace audio {
+	namespace algo {
+		namespace chunkware {
+			class GateRms : public Gate {
+				public:
+					GateRms();
+					virtual ~GateRms() {}
+					// sample rate
+					virtual void setSampleRate(double _sampleRate);
+					// RMS window
+					virtual void setWindow(double _ms);
+					virtual double getWindow() const {
+						return m_averager.getTc();
+					}
+					// runtime process
+					// call before runtime (in resume())
+					virtual void initRuntime();
+					// gate runtime process
+					void process(double& _in1, double& _in2);
+				private:
+					audio::algo::chunkware::EnvelopeDetector m_averager; //!< averager
+					double m_averageSuares; //!< average of squares
+			};
+		}
+	}
+}
+
+#endif
diff --git a/audio/algo/chunkware/Limiter.cpp b/audio/algo/chunkware/Limiter.cpp
index a4efa54..4edc4ce 100644
--- a/audio/algo/chunkware/Limiter.cpp
+++ b/audio/algo/chunkware/Limiter.cpp
@@ -43,25 +43,25 @@ audio::algo::chunkware::Limiter::Limiter() :
 	m_outputBuffer[ 1 ].resize(BUFFER_SIZE, 0.0);
 }
 
-void audio::algo::chunkware::Limiter::setThresh(double dB) {
-	m_threshdB = dB;
-	m_threshold = dB2lin(dB);
+void audio::algo::chunkware::Limiter::setThresh(double _dB) {
+	m_threshdB = _dB;
+	m_threshold = dB2lin(_dB);
 }
 
-void audio::algo::chunkware::Limiter::setAttack(double ms) {
-	unsigned int samp = int(0.001 * ms * m_attack.getSampleRate());
+void audio::algo::chunkware::Limiter::setAttack(double _ms) {
+	unsigned int samp = int(0.001 * _ms * m_attack.getSampleRate());
 	AA_CHUNK_ASSERT(samp < BUFFER_SIZE, "input function error");
 	m_peakHold = samp;
-	m_attack.setTc(ms);
+	m_attack.setTc(_ms);
 }
 
-void audio::algo::chunkware::Limiter::setRelease(double ms) {
-	m_release.setTc(ms);
+void audio::algo::chunkware::Limiter::setRelease(double _ms) {
+	m_release.setTc(_ms);
 }
 
-void audio::algo::chunkware::Limiter::setSampleRate(double sampleRate) {
-	m_attack.setSampleRate(sampleRate);
-	m_release.setSampleRate(sampleRate);
+void audio::algo::chunkware::Limiter::setSampleRate(double _sampleRate) {
+	m_attack.setSampleRate(_sampleRate);
+	m_release.setSampleRate(_sampleRate);
 }
 
 void audio::algo::chunkware::Limiter::initRuntime() {
@@ -79,10 +79,10 @@ void audio::algo::chunkware::Limiter::FastEnvelope::setCoef() {
 }
 
 
-void audio::algo::chunkware::Limiter::process(double &in1, double &in2) {
+void audio::algo::chunkware::Limiter::process(double& _in1, double& _in2) {
 	// create sidechain
-	double rect1 = fabs(in1); // rectify input
-	double rect2 = fabs(in2);
+	double rect1 = fabs(_in1); // rectify input
+	double rect2 = fabs(_in2);
 	double keyLink = std::max(rect1, rect2); // link channels with greater of 2
 	// threshold
 	// we always want to feed the sidechain AT LEATS the threshold value
@@ -136,16 +136,16 @@ void audio::algo::chunkware::Limiter::process(double &in1, double &in2) {
 	// (m_cursor - delay) & m_bufferMask gets sample from [delay] samples ago
 	// m_bufferMask variable wraps index
 	unsigned int delayIndex = (m_cursor - m_peakHold) & m_bufferMask;
-	double delay1 = m_outputBuffer[ 0 ][ delayIndex ];
-	double delay2 = m_outputBuffer[ 1 ][ delayIndex ];
+	double delay1 = m_outputBuffer[0][delayIndex];
+	double delay2 = m_outputBuffer[1][delayIndex];
 	// load current buffer index and advance current index
 	// m_bufferMask wraps m_cursor index
-	m_outputBuffer[ 0 ][ m_cursor ] = in1;
-	m_outputBuffer[ 1 ][ m_cursor ] = in2;
+	m_outputBuffer[0][m_cursor] = _in1;
+	m_outputBuffer[1][m_cursor] = _in2;
 	++m_cursor &= m_bufferMask;
 	// output gain
-	in1 = delay1 * gR;	// apply gain reduction to input
-	in2 = delay2 * gR;
+	_in1 = delay1 * gR;	// apply gain reduction to input
+	_in2 = delay2 * gR;
 	/* REGARDING THE GAIN REDUCTION: Due to the logarithmic nature
 	 * of the attack phase, the sidechain will never achieve "full"
 	 * attack. (Actually, it is only guaranteed to achieve 99% of
diff --git a/audio/algo/chunkware/Limiter.h b/audio/algo/chunkware/Limiter.h
index f018444..57e59ba 100644
--- a/audio/algo/chunkware/Limiter.h
+++ b/audio/algo/chunkware/Limiter.h
@@ -35,17 +35,14 @@
 namespace audio {
 	namespace algo {
 		namespace chunkware {
-			//-------------------------------------------------------------
-			// simple limiter
-			//-------------------------------------------------------------
 			class Limiter {
 				public:
 					Limiter();
 					virtual ~Limiter() {}
 					// parameters
-					virtual void setThresh(double dB);
-					virtual void setAttack(double ms);
-					virtual void setRelease(double ms);
+					virtual void setThresh(double _dB);
+					virtual void setAttack(double _ms);
+					virtual void setRelease(double _ms);
 					virtual double getThresh() const {
 						return m_threshdB;
 					}
@@ -60,7 +57,7 @@ namespace audio {
 						return m_peakHold;
 					}
 					// sample rate dependencies
-					virtual void   setSampleRate(double sampleRate);
+					virtual void   setSampleRate(double _sampleRate);
 					virtual double getSampleRate() {
 						return m_attack.getSampleRate();
 					}
@@ -68,13 +65,13 @@ namespace audio {
 					// call before runtime (in resume())
 					virtual void initRuntime();
 					// limiter runtime process
-					void process(double &in1, double &in2);
+					void process(double& _in1, double& _in2);
 				protected:
 					// class for faster attack/release
-					class FastEnvelope : public EnvelopeDetector {
+					class FastEnvelope : public audio::algo::chunkware::EnvelopeDetector {
 						public:
-							FastEnvelope(double ms = 1.0, double sampleRate = 44100.0) :
-							  EnvelopeDetector(ms, sampleRate) {
+							FastEnvelope(double _ms = 1.0, double _sampleRate = 44100.0) :
+							  EnvelopeDetector(_ms, _sampleRate) {
 								
 							}
 							virtual ~FastEnvelope() {}
@@ -91,8 +88,8 @@ namespace audio {
 					unsigned int m_peakTimer; //!< peak hold timer
 					double m_maxPeak; //!< max peak
 					// attack/release envelope
-					FastEnvelope m_attack; //!< attack
-					FastEnvelope m_release; //!< release
+					audio::algo::chunkware::Limiter::FastEnvelope m_attack; //!< attack
+					audio::algo::chunkware::Limiter::FastEnvelope m_release; //!< release
 					double m_overThresholdEnvelope; //!< over-threshold envelope (linear)
 					// buffer
 					// BUFFER_SIZE default can handle up to ~10ms at 96kHz