comparison effects/reverb/Source/PluginProcessor.cpp @ 0:e32fe563e124

First commit

+/*
+  This code accompanies the textbook:
+ 
+  Digital Audio Effects: Theory, Implementation and Application
+  Joshua D. Reiss and Andrew P. McPherson
+ 
+  ---
+ 
+  Reverb: algorithmic reverb effect based on MVerb
+  See textbook Chapter 11: Reverberation
+ 
+  Original code by Martin Eastwood: MVerb (see MVerb.h)
+  Adapted for JUCE by Brecht De Man
+ 
+  When using this code (or a modified version thereof) please cite:
+
+  R. Stables, S. Enderby, B. De Man, G. Fazekas, J. D. Reiss, "SAFE:
+  A System for the Extraction and Retrieval of Semantic Audio
+  Descriptors," 15th International Society for Music Information
+  Retrieval Conference (ISMIR 2014), 2014.
+ 
+  ---
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+ 
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#include "PluginProcessor.h"
+#include "PluginEditor.h"
+
+#if JUCE_INTEL
+ #define JUCE_SNAP_TO_ZERO(n)    if (! (n < -1.0e-8 || n > 1.0e-8)) n = 0;
+#else
+ #define JUCE_SNAP_TO_ZERO(n)
+#endif
+
+ReverbAudioProcessor::ReverbAudioProcessor()
+:
+    _numChannels            (1)
+    ,_numSamples			(1)  // dummy - will be set in prepareToPlay
+    ,_sampleRate			(1)  // dummy - will be set in prepareToPlay
+    ,_density               (1.0)
+    ,_decay                 (1.0)
+    ,_size                  (1.0)
+    ,_damp                  (1.0)
+    ,_bandwidth             (1.0)
+    ,_predelay              (0.0)
+    ,_gain                  (1.0)
+    ,_mix                   (0.5)
+    ,_lateEarly             (0.5)
+    ,tempInput              (1,1)// dummy - will be set in prepareToPlay
+    ,tempOutput             (1,1)// dummy - will be set in prepareToPlay
+    ,_lastUIWidth			(850)
+    ,_lastUIHeight			(650)
+    
+{
+    // Update all parameters
+    for (int index = 0; index < MVerb<float>::NUM_PARAMS; ++index)
+    {
+        updateParameters(index);
+    }
+}
+
+ReverbAudioProcessor::~ReverbAudioProcessor()
+{
+}
+
+//-----------------------------------------------------------------------------
+// P R E P A R E   T O   P L A Y
+void ReverbAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
+{
+    // If sample rate/block size changes or straight after construction
+    if (_numSamples != samplesPerBlock || _sampleRate != sampleRate)
+    {
+        _sampleRate  = sampleRate;
+        _numSamples  = samplesPerBlock;
+        _numChannels = getNumInputChannels();
+        
+        tempInput.setSize (_numChannels,_numSamples);
+        tempOutput.setSize(_numChannels,_numSamples);
+        tempInput.clear();
+        tempOutput.clear();
+        
+        _mverb.reset();
+        _mverb.setSampleRate (_sampleRate);  // set reverb sample rate
+    }
+}
+
+
+//-----------------------------------------------------------------------------
+// P R O C E S S   B L O C K
+void ReverbAudioProcessor::processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages)
+{
+    int numSamples = buffer.getNumSamples();
+    int numChannels = buffer.getNumChannels();
+    
+    for(int channel = 0; channel < numChannels; channel++)
+    {
+        tempInput.copyFrom (channel, 0, buffer, channel, 0, numSamples);
+    }
+    
+    float** input = tempInput.getArrayOfWritePointers();
+    float** output = tempOutput.getArrayOfWritePointers();
+    
+    _mverb.process (input, output, numSamples); // processing by MVerb
+    
+    for(int channel = 0; channel < numChannels; channel++)
+    {
+        buffer.copyFrom (channel, 0, output [channel], numSamples);
+    }
+}
+
+
+//-----------------------------------------------------------------------------
+// U P D A T E   P A R A M E T E R S
+void ReverbAudioProcessor::updateParameters (int index)
+{
+    switch(index)
+    {
+        case MVerb<float>::DAMPINGFREQ:
+            _mverb.setParameter (index, _damp);
+            break;
+            
+        case MVerb<float>::DENSITY:
+            _mverb.setParameter (index, _density);
+            break;
+            
+        case MVerb<float>::BANDWIDTHFREQ:
+            _mverb.setParameter (index, _bandwidth);
+            break;
+            
+        case MVerb<float>::PREDELAY:
+            _mverb.setParameter (index, _predelay);
+            break;
+            
+        case MVerb<float>::DECAY:
+            _mverb.setParameter (index, _decay);
+            break;
+            
+        case MVerb<float>::SIZE:
+            _mverb.setParameter (index, _size);
+            break;
+            
+        case MVerb<float>::GAIN:
+            _mverb.setParameter (index, _gain);
+            break;
+            
+        case MVerb<float>::MIX:
+            _mverb.setParameter (index, _mix);
+            break;
+            
+        case MVerb<float>::EARLYMIX:
+            _mverb.setParameter (index, _lateEarly);
+            break;
+    }
+}
+
+
+//-----------------------------------------------------------------------------
+// R E S E T
+void ReverbAudioProcessor::Reset()
+{
+    _mverb.reset(); // not used
+}
+
+
+//-----------------------------------------------------------------------------
+//
+void ReverbAudioProcessor::releaseResources()
+{
+    // When playback stops, you can use this to free up any spare memory, etc.
+}
+
+
+bool ReverbAudioProcessor::hasEditor() const
+{
+    return true; // (change this to false if you choose to not supply an editor)
+}
+
+AudioProcessorEditor* ReverbAudioProcessor::createEditor()
+{
+    return new ReverbAudioProcessorEditor (this);
+}
+
+
+//==============================================================================
+void ReverbAudioProcessor::getStateInformation (MemoryBlock& destData)
+{
+    // SAVE STATE INFO
+    XmlElement xml("JRAMReverb_XML");
+    
+    // Knobs
+    xml.setAttribute("_density"     ,_density);
+    xml.setAttribute("_decay"       ,_decay);
+    xml.setAttribute("_size"        ,_size);
+    xml.setAttribute("_damp"        ,_damp);
+    xml.setAttribute("_bandwidth"   ,_bandwidth);
+    xml.setAttribute("_predelay"    ,_predelay);
+    xml.setAttribute("_gain"        ,_gain);
+    xml.setAttribute("_mix"         ,_mix);
+    xml.setAttribute("_lateEarly"   ,_lateEarly);
+    
+    
+    // then use this helper function to stuff it into the binary blob and return it..
+    copyXmlToBinary(xml, destData);
+}
+
+void ReverbAudioProcessor::setStateInformation (const void* data, int sizeInBytes)
+{
+    // LOAD STATE INFO
+    ScopedPointer<XmlElement> xmlState (getXmlFromBinary (data, sizeInBytes));
+    
+    // make sure that it's actually our type of XML object..
+    if(xmlState->hasTagName("JRAMReverb_XML"))
+    {
+        // Knobs
+        _density        = (float) xmlState->getDoubleAttribute("_density",true);
+        _decay          = (float) xmlState->getDoubleAttribute("_decay",true);
+        _size           = (float) xmlState->getDoubleAttribute("_size",true);
+        _damp           = (float) xmlState->getDoubleAttribute("_damp",true);
+        _bandwidth      = (float) xmlState->getDoubleAttribute("_bandwidth",true);
+        _predelay       = (float) xmlState->getDoubleAttribute("_predelay",true);
+        _gain           = (float) xmlState->getDoubleAttribute("_gain",true);
+        _mix            = (float) xmlState->getDoubleAttribute("_mix",true);
+        _lateEarly      = (float) xmlState->getDoubleAttribute("_lateEarly",true);
+    }
+}
+
+// This creates new instances of the plugin..
+AudioProcessor* JUCE_CALLTYPE createPluginFilter()
+{
+    return new ReverbAudioProcessor();
+}
+
+const String ReverbAudioProcessor::getName() const
+{
+    return JucePlugin_Name;
+}
+
+bool ReverbAudioProcessor::silenceInProducesSilenceOut() const
+{
+    return true;
+}
+
+int ReverbAudioProcessor::getNumParameters()
+{
+    return MVerb<float>::NUM_PARAMS;
+}
+
+float ReverbAudioProcessor::getParameter (int index) // externally accessible
+{
+    switch (index)
+    {
+        case MVerb<float>::DENSITY:         return GetDensity();
+        case MVerb<float>::DECAY:           return GetDecay();
+        case MVerb<float>::SIZE:            return GetSize();
+        case MVerb<float>::DAMPINGFREQ:     return GetDamp();
+        case MVerb<float>::BANDWIDTHFREQ:   return GetBandwidth();
+        case MVerb<float>::PREDELAY:        return GetPredelay();
+        case MVerb<float>::GAIN:            return GetGain();
+        case MVerb<float>::MIX:             return GetMix();
+        case MVerb<float>::EARLYMIX:        return GetLateEarly();
+		default:                            return 0.0f;
+    }
+}
+
+void ReverbAudioProcessor::setParameter (int index, float newValue) // externally accessible
+{
+    switch (index)
+    {
+        case MVerb<float>::DENSITY:
+            SetDensity(newValue);
+            break;
+        case MVerb<float>::DECAY:
+            SetDecay(newValue);
+            break;
+        case MVerb<float>::SIZE:
+            SetSize(newValue);
+            break;
+        case MVerb<float>::DAMPINGFREQ:
+            SetDamp(newValue);
+            break;
+        case MVerb<float>::BANDWIDTHFREQ:
+            SetBandwidth(newValue);
+            break;
+        case MVerb<float>::PREDELAY:
+            SetPredelay(newValue);
+            break;
+        case MVerb<float>::GAIN:
+            SetGain(newValue);
+            break;
+        case MVerb<float>::MIX:
+            SetMix(newValue);
+            break;
+        case MVerb<float>::EARLYMIX:
+            SetLateEarly(newValue);
+            break;
+        default:
+            break;
+    }
+}
+
+const String ReverbAudioProcessor::getParameterName (int index) // externally accessible
+{
+    switch (index)
+    {
+        case MVerb<float>::DENSITY:         return "Density";
+        case MVerb<float>::DECAY:           return "Decay";
+        case MVerb<float>::SIZE:            return "Size";
+        case MVerb<float>::DAMPINGFREQ:     return "Damp";
+        case MVerb<float>::BANDWIDTHFREQ:   return "Bandwidth";
+        case MVerb<float>::PREDELAY:        return "Predelay";
+        case MVerb<float>::GAIN:            return "Gain";
+        case MVerb<float>::MIX:             return "Mix";
+        case MVerb<float>::EARLYMIX:        return "Late vs. early reflections";
+		default:                            break;
+    }
+    return String::empty;
+}
+
+const String ReverbAudioProcessor::getParameterText (int index)
+{
+    return String (getParameter (index), 2);
+}
+
+const String ReverbAudioProcessor::getInputChannelName (int channelIndex) const
+{
+    return String (channelIndex + 1);
+}
+
+const String ReverbAudioProcessor::getOutputChannelName (int channelIndex) const
+{
+    return String (channelIndex + 1);
+}
+
+bool ReverbAudioProcessor::isInputChannelStereoPair (int index) const
+{
+    return true;
+}
+
+bool ReverbAudioProcessor::isOutputChannelStereoPair (int index) const
+{
+    return true;
+}
+
+bool ReverbAudioProcessor::acceptsMidi() const
+{
+    #if JucePlugin_WantsMidiInput
+        return true;
+    #else
+        return false;
+    #endif
+}
+
+bool ReverbAudioProcessor::producesMidi() const
+{
+    #if JucePlugin_ProducesMidiOutput
+        return true;
+    #else
+        return false;
+    #endif
+}
+
+int ReverbAudioProcessor::getNumPrograms()
+{
+    return 0;
+}
+
+int ReverbAudioProcessor::getCurrentProgram()
+{
+    return 0;
+}
+
+void ReverbAudioProcessor::setCurrentProgram (int index)
+{
+}
+
+const String ReverbAudioProcessor::getProgramName (int index)
+{
+    return String::empty;
+}
+
+void ReverbAudioProcessor::changeProgramName (int index, const String& newName)
+{
+}