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annotate effects/autowah/Source/PluginProcessor.h @ 1:04e171d2a747 tip

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JUCE 4 compatible. Standardised paths on Mac: modules '../../juce/modules'; VST folder '~/SDKs/vstsdk2.4' (JUCE default). Replaced deprecated 'getSampleData(channel)'; getToggleState(...); setToggleState(...); setSelectedId(...). Removed unused variables. Ignore JUCE code and build files.
author Brecht De Man <b.deman@qmul.ac.uk>
date Sun, 22 Nov 2015 15:23:40 +0000
parents e32fe563e124
children
rev   line source
andrewm@0 1 /*
andrewm@0 2 This code accompanies the textbook:
andrewm@0 3
andrewm@0 4 Digital Audio Effects: Theory, Implementation and Application
andrewm@0 5 Joshua D. Reiss and Andrew P. McPherson
andrewm@0 6
andrewm@0 7 ---
andrewm@0 8
andrewm@0 9 Auto-Wah: LFO or envelope-operated wah effect
andrewm@0 10 See textbook Chapter 4: Filter Effects
andrewm@0 11
andrewm@0 12 Code by Andrew McPherson, Brecht de Man and Joshua Reiss
andrewm@0 13
andrewm@0 14 ---
andrewm@0 15
andrewm@0 16 This program is free software: you can redistribute it and/or modify
andrewm@0 17 it under the terms of the GNU General Public License as published by
andrewm@0 18 the Free Software Foundation, either version 3 of the License, or
andrewm@0 19 (at your option) any later version.
andrewm@0 20
andrewm@0 21 This program is distributed in the hope that it will be useful,
andrewm@0 22 but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@0 23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
andrewm@0 24 GNU General Public License for more details.
andrewm@0 25
andrewm@0 26 You should have received a copy of the GNU General Public License
andrewm@0 27 along with this program. If not, see <http://www.gnu.org/licenses/>.
andrewm@0 28 */
andrewm@0 29
andrewm@0 30 #ifndef __PLUGINPROCESSOR_H_4693CB6E__
andrewm@0 31 #define __PLUGINPROCESSOR_H_4693CB6E__
andrewm@0 32
andrewm@0 33 #define _USE_MATH_DEFINES
andrewm@0 34 #include "../JuceLibraryCode/JuceHeader.h"
andrewm@0 35 #include "ResonantLowpassFilter.h"
andrewm@0 36
andrewm@0 37 //==============================================================================
andrewm@0 38 /**
andrewm@0 39 */
andrewm@0 40 class AutoWahAudioProcessor : public AudioProcessor
andrewm@0 41 {
andrewm@0 42 public:
andrewm@0 43 //==============================================================================
andrewm@0 44 AutoWahAudioProcessor();
andrewm@0 45 ~AutoWahAudioProcessor();
andrewm@0 46
andrewm@0 47 //==============================================================================
andrewm@0 48 void prepareToPlay (double sampleRate, int samplesPerBlock);
andrewm@0 49 void releaseResources();
andrewm@0 50
andrewm@0 51 void processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages);
andrewm@0 52
andrewm@0 53 //==============================================================================
andrewm@0 54 AudioProcessorEditor* createEditor();
andrewm@0 55 bool hasEditor() const;
andrewm@0 56
andrewm@0 57 //==============================================================================
andrewm@0 58 const String getName() const;
andrewm@0 59
andrewm@0 60 int getNumParameters();
andrewm@0 61
andrewm@0 62 float getParameter (int index);
andrewm@0 63 void setParameter (int index, float newValue);
andrewm@0 64
andrewm@0 65 const String getParameterName (int index);
andrewm@0 66 const String getParameterText (int index);
andrewm@0 67
andrewm@0 68 const String getInputChannelName (int channelIndex) const;
andrewm@0 69 const String getOutputChannelName (int channelIndex) const;
andrewm@0 70 bool isInputChannelStereoPair (int index) const;
andrewm@0 71 bool isOutputChannelStereoPair (int index) const;
andrewm@0 72
andrewm@0 73 bool silenceInProducesSilenceOut() const;
andrewm@0 74 double getTailLengthSeconds() const;
andrewm@0 75 bool acceptsMidi() const;
andrewm@0 76 bool producesMidi() const;
andrewm@0 77
andrewm@0 78 //==============================================================================
andrewm@0 79 int getNumPrograms();
andrewm@0 80 int getCurrentProgram();
andrewm@0 81 void setCurrentProgram (int index);
andrewm@0 82 const String getProgramName (int index);
andrewm@0 83 void changeProgramName (int index, const String& newName);
andrewm@0 84
andrewm@0 85 //==============================================================================
andrewm@0 86 void getStateInformation (MemoryBlock& destData);
andrewm@0 87 void setStateInformation (const void* data, int sizeInBytes);
andrewm@0 88
andrewm@0 89 //==============================================================================
andrewm@0 90
andrewm@0 91 // these are used to persist the UI's size - the values are stored along with the
andrewm@0 92 // filter's other parameters, and the UI component will update them when it gets
andrewm@0 93 // resized.
andrewm@0 94 int lastUIWidth_, lastUIHeight_;
andrewm@0 95
andrewm@0 96 enum Parameters
andrewm@0 97 {
andrewm@0 98 kBaseFrequencyParam = 0, /* Centre frequency in Hz */
andrewm@0 99 kQParam, /* Q of the resonant filter */
andrewm@0 100 kLFOFrequencyParam,
andrewm@0 101 kLFOWidthParam,
andrewm@0 102 kEnvelopeWidthParam,
andrewm@0 103 kEnvelopeAttackParam,
andrewm@0 104 kEnvelopeDecayParam,
andrewm@0 105 kNumParameters
andrewm@0 106 };
andrewm@0 107
andrewm@0 108 float baseFrequency_, q_;
andrewm@0 109 float lfoFrequency_, lfoWidth_;
andrewm@0 110 float envelopeWidth_, envelopeAttack_, envelopeDecay_;
andrewm@0 111 private:
andrewm@0 112 // Methods for creating and releasing memory associated with filters
andrewm@0 113 void allocateFilters();
andrewm@0 114 void deallocateFilters();
andrewm@0 115
andrewm@0 116 float lfoPhase_; // Phase of the low-frequency oscillator
andrewm@0 117
andrewm@0 118 double *envelopes_; // Values of signal envelopes for each channel
andrewm@0 119 int numEnvelopes_;
andrewm@0 120
andrewm@0 121 // Convert the attack and decay time constants to a multiplier for
andrewm@0 122 // a first-order lowpass filter
andrewm@0 123 double attackMultiplier_, decayMultiplier_;
andrewm@0 124
andrewm@0 125 ResonantLowpassFilter **wahFilters_;
andrewm@0 126 int numWahFilters_;
andrewm@0 127 double inverseSampleRate_; // Save the inverse of the sample rate for faster calculation
andrewm@0 128
andrewm@0 129 //==============================================================================
andrewm@0 130 JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AutoWahAudioProcessor);
andrewm@0 131 };
andrewm@0 132
andrewm@0 133 #endif // __PLUGINPROCESSOR_H_4693CB6E__