Merge pull request #5 from Blackaddr/feature/layout_change
Library structure layout change, new classes and effects for ParamterAutomation and SoundOnSoundpull/1/head
Blackaddr Audio
6 years ago
committed by
GitHub
commit
5c4be4bc2a
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/*************************************************************************
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* This demo uses the BAGuitar library to provide enhanced control of |
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* the TGA Pro board. |
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*
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* The latest copy of the BA Guitar library can be obtained from |
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* https://github.com/Blackaddr/BAGuitar
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*
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* This demo will provide an audio passthrough, as well as exercise the |
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* MIDI interface. |
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*
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* It can optionally exercise the SPI MEM0 if installed on the TGA Pro board. |
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*
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*/ |
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#include <Wire.h> |
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#include <Audio.h> |
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#include <MIDI.h> |
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#include <SPI.h> |
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#include "BAGuitar.h" |
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#include <midi_UsbTransport.h> |
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static const unsigned sUsbTransportBufferSize = 16; |
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typedef midi::UsbTransport<sUsbTransportBufferSize> UsbTransport; |
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UsbTransport sUsbTransport; |
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MIDI_CREATE_INSTANCE(UsbTransport, sUsbTransport, uMIDI); |
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MIDI_CREATE_DEFAULT_INSTANCE(); |
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using namespace midi; |
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using namespace BAEffects; |
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#define MIDI_DEBUG |
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using namespace BALibrary; |
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AudioInputI2S i2sIn; |
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AudioOutputI2S i2sOut; |
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BAAudioControlWM8731 codec; |
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// External SRAM is required for this effect due to the very long
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// delays required.
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ExternalSramManager externalSram; |
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ExtMemSlot delaySlot; // Declare an external memory slot.
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AudioEffectSOS sos(&delaySlot); |
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// Add some effects for our soloing channel
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AudioEffectDelay delayModule; // we'll add a little slapback echo
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AudioMixer4 gainModule; // This will be used simply to reduce the gain before the reverb
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AudioEffectReverb reverb; // Add a bit of 'verb to our tone
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AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
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AudioMixer4 mixer; |
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// Connect the input
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AudioConnection inputToSos(i2sIn, 0, sos, 0); |
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AudioConnection inputToSolo(i2sIn, 0, delayModule, 0); |
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// Patch cables for the SOLO channel
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AudioConnection inputToGain(delayModule, 0, gainModule, 0); |
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AudioConnection inputToReverb(gainModule, 0, reverb, 0); |
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// Output Mixer
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AudioConnection mixer0input(i2sIn, 0, mixer, 0); // SOLO Dry Channel
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AudioConnection mixer1input(reverb, 0, mixer, 1); // SOLO Wet Channel
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AudioConnection mixer2input(sos, 0, mixer, 2); // SOS Channel
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AudioConnection inputToCab(mixer, 0, cabFilter, 0); |
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// CODEC Outputs
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AudioConnection outputLeft(cabFilter, 0, i2sOut, 0); |
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AudioConnection outputRight(cabFilter, 0, i2sOut, 1); |
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int loopCount = 0; |
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void OnControlChange(byte channel, byte control, byte value) { |
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sos.processMidi(channel-1, control, value); |
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#ifdef MIDI_DEBUG |
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Serial.print("Control Change, ch="); |
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Serial.print(channel, DEC); |
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Serial.print(", control="); |
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Serial.print(control, DEC); |
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Serial.print(", value="); |
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Serial.print(value, DEC); |
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Serial.println(); |
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#endif |
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} |
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void setup() { |
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delay(100); |
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Serial.begin(57600); // Start the serial port
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// Disable the codec first
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codec.disable(); |
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delay(100); |
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AudioMemory(128); |
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delay(5); |
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// Enable the codec
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Serial.println("Enabling codec...\n"); |
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codec.enable(); |
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delay(100); |
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// We have to request memory be allocated to our slot.
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externalSram.requestMemory(&delaySlot, SPI_MEM0_SIZE_BYTES, MemSelect::MEM0, true); |
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//externalSram.requestMemory(&delaySlot, 50.0f, MemSelect::MEM0, true);
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// Setup MIDI
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MIDI.begin(MIDI_CHANNEL_OMNI); |
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MIDI.setHandleControlChange(OnControlChange); |
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uMIDI.begin(MIDI_CHANNEL_OMNI); |
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uMIDI.setHandleControlChange(OnControlChange); |
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// Configure the LED to indicate the gate status
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sos.setGateLedGpio(USR_LED_ID); |
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// Configure which MIDI CC's will control the effect parameters
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sos.mapMidiControl(AudioEffectSOS::BYPASS,16); |
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sos.mapMidiControl(AudioEffectSOS::CLEAR_FEEDBACK_TRIGGER,22); |
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sos.mapMidiControl(AudioEffectSOS::GATE_TRIGGER,23); |
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sos.mapMidiControl(AudioEffectSOS::GATE_OPEN_TIME,20); |
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sos.mapMidiControl(AudioEffectSOS::GATE_CLOSE_TIME,21); |
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sos.mapMidiControl(AudioEffectSOS::FEEDBACK,24); |
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sos.mapMidiControl(AudioEffectSOS::VOLUME,17); |
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// Besure to enable the delay. When disabled, audio is is completely blocked
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// to minimize resources to nearly zero.
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sos.enable();
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// Set some default values.
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// These can be changed by sending MIDI CC messages over the USB using
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// the BAMidiTester application.
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sos.bypass(false); |
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sos.gateOpenTime(3000.0f); |
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sos.gateCloseTime(1000.0f); |
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sos.feedback(0.9f); |
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// Setup effects on the SOLO channel
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gainModule.gain(0, 0.25); // the reverb unit clips easily if the input is too high
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delayModule.delay(0, 50.0f); // 50 ms slapback delay
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// Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
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cabFilter.setLowpass(0, 4500, .7071); |
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cabFilter.setLowpass(1, 4500, .7071); |
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// Setup the Mixer
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mixer.gain(0, 0.5f); // SOLO Dry gain
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mixer.gain(1, 0.5f); // SOLO Wet gain
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mixer.gain(1, 1.0f); // SOS gain
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} |
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void loop() { |
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// usbMIDI.read() needs to be called rapidly from loop(). When
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// each MIDI messages arrives, it return true. The message must
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// be fully processed before usbMIDI.read() is called again.
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if (loopCount % 524288 == 0) { |
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Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage()); |
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Serial.print("% "); |
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Serial.print(" sos: "); Serial.print(sos.processorUsage()); |
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Serial.println("%"); |
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} |
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loopCount++; |
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MIDI.read(); |
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uMIDI.read(); |
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// // check for new MIDI from USB
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// if (usbMIDI.read()) {
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// // this code entered only if new MIDI received
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// byte type, channel, data1, data2, cable;
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// type = usbMIDI.getType(); // which MIDI message, 128-255
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// channel = usbMIDI.getChannel(); // which MIDI channel, 1-16
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// data1 = usbMIDI.getData1(); // first data byte of message, 0-127
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// data2 = usbMIDI.getData2(); // second data byte of message, 0-127
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// Serial.println(String("Received a MIDI message on channel ") + channel);
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//
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// if (type == MidiType::ControlChange) {
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// // if type is 3, it's a CC MIDI Message
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// // Note: the Arduino MIDI library encodes channels as 1-16 instead
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// // of 0 to 15 as it should, so we must subtract one.
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// OnControlChange(channel-1, data1, data2);
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// }
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// }
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} |
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@ -0,0 +1,19 @@ |
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// To give your project a unique name, this code must be
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// placed into a .c file (its own tab). It can not be in
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// a .cpp file or your main sketch (the .ino file).
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#include "usb_names.h" |
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// Edit these lines to create your own name. The length must
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// match the number of characters in your custom name.
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#define MIDI_NAME {'B','l','a','c','k','a','d','d','r',' ','A','u','d','i','o',' ','T','G','A',' ','P','r','o'} |
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#define MIDI_NAME_LEN 23 |
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// Do not change this part. This exact format is required by USB.
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struct usb_string_descriptor_struct usb_string_product_name = { |
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2 + MIDI_NAME_LEN * 2, |
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3, |
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MIDI_NAME |
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}; |
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@ -0,0 +1,146 @@ |
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/**************************************************************************//**
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* @file |
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* @author Steve Lascos |
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* @company Blackaddr Audio |
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* |
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* AudioEffectSOS is a class f |
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* |
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* @copyright This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version.* |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************/ |
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#ifndef __BAEFFECTS_BAAUDIOEFFECTSOS_H |
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#define __BAEFFECTS_BAAUDIOEFFECTSOS_H |
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#include <Audio.h> |
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#include "LibBasicFunctions.h" |
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namespace BAEffects { |
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/**************************************************************************//**
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* AudioEffectSOS |
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*****************************************************************************/ |
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class AudioEffectSOS : public AudioStream { |
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public: |
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///< List of AudioEffectAnalogDelay MIDI controllable parameters
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enum { |
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BYPASS = 0, ///< controls effect bypass
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GATE_TRIGGER, ///< begins the gate sequence
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GATE_OPEN_TIME, ///< controls how long it takes to open the gate
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//GATE_HOLD_TIME, ///< controls how long the gate stays open at unity
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GATE_CLOSE_TIME, ///< controls how long it takes to close the gate (release)
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CLEAR_FEEDBACK_TRIGGER, ///< begins the sequence to clear out the looping feedback
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FEEDBACK, ///< controls the amount of feedback, more gives longer SOS sustain
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VOLUME, ///< controls the output volume level
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NUM_CONTROLS ///< this can be used as an alias for the number of MIDI controls
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}; |
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// *** CONSTRUCTORS ***
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AudioEffectSOS() = delete; |
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AudioEffectSOS(float maxDelayMs); |
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AudioEffectSOS(size_t numSamples); |
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/// Construct an analog delay using external SPI via an ExtMemSlot. The amount of
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/// delay will be determined by the amount of memory in the slot.
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/// @param slot A pointer to the ExtMemSlot to use for the delay.
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AudioEffectSOS(BALibrary::ExtMemSlot *slot); // requires sufficiently sized pre-allocated memory
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virtual ~AudioEffectSOS(); ///< Destructor
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void setGateLedGpio(int pinId); |
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// *** PARAMETERS ***
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void gateOpenTime(float milliseconds); |
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void gateCloseTime(float milliseconds); |
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void feedback(float feedback) { m_feedback = feedback; } |
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/// Bypass the effect.
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/// @param byp when true, bypass wil disable the effect, when false, effect is enabled.
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/// Note that audio still passes through when bypass is enabled.
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void bypass(bool byp) { m_bypass = byp; } |
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/// Activate the gate automation. Input gate will open, then close.
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void trigger() { m_inputGateAuto.trigger(); } |
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/// Set the output volume. This affect both the wet and dry signals.
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/// @details The default is 1.0.
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/// @param vol Sets the output volume between -1.0 and +1.0
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void volume(float vol) {m_volume = vol; } |
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// ** ENABLE / DISABLE **
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/// Enables audio processing. Note: when not enabled, CPU load is nearly zero.
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void enable(); |
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/// Disables audio process. When disabled, CPU load is nearly zero.
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void disable() { m_enable = false; } |
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// ** MIDI **
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/// Sets whether MIDI OMNI channel is processig on or off. When on,
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/// all midi channels are used for matching CCs.
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/// @param isOmni when true, all channels are processed, when false, channel
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/// must match configured value.
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void setMidiOmni(bool isOmni) { m_isOmni = isOmni; } |
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/// Configure an effect parameter to be controlled by a MIDI CC
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/// number on a particular channel.
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/// @param parameter one of the parameter names in the class enum
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/// @param midiCC the CC number from 0 to 127
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/// @param midiChannel the effect will only response to the CC on this channel
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/// when OMNI mode is off.
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void mapMidiControl(int parameter, int midiCC, int midiChannel = 0); |
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/// process a MIDI Continous-Controller (CC) message
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/// @param channel the MIDI channel from 0 to 15)
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/// @param midiCC the CC number from 0 to 127
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/// @param value the CC value from 0 to 127
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void processMidi(int channel, int midiCC, int value); |
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virtual void update(void); ///< update automatically called by the Teesny Audio Library
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private: |
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audio_block_t *m_inputQueueArray[1]; |
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bool m_isOmni = false; |
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bool m_bypass = true; |
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bool m_enable = false; |
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BALibrary::AudioDelay *m_memory = nullptr; |
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bool m_externalMemory = true; |
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audio_block_t *m_previousBlock = nullptr; |
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audio_block_t *m_blockToRelease = nullptr; |
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size_t m_maxDelaySamples = 0; |
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int m_gateLedPinId = -1; |
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// Controls
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int m_midiConfig[NUM_CONTROLS][2]; // stores the midi parameter mapping
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size_t m_delaySamples = 0; |
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float m_openTimeMs = 0.0f; |
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float m_closeTimeMs = 0.0f; |
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float m_feedback = 0.0f; |
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float m_volume = 1.0f; |
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// Automated Controls
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BALibrary::ParameterAutomationSequence<float> m_inputGateAuto = BALibrary::ParameterAutomationSequence<float>(3); |
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BALibrary::ParameterAutomationSequence<float> m_clearFeedbackAuto = BALibrary::ParameterAutomationSequence<float>(3); |
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// Private functions
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void m_preProcessing (audio_block_t *out, audio_block_t *input, audio_block_t *delayedSignal); |
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void m_postProcessing(audio_block_t *out, audio_block_t *input); |
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}; |
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} |
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#endif /* __BAEFFECTS_BAAUDIOEFFECTSOS_H */ |
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@ -0,0 +1,241 @@ |
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/*
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* ParameterAutomation.cpp |
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* |
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* Created on: April 14, 2018 |
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* Author: slascos |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version.* |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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#include "LibBasicFunctions.h" |
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namespace BALibrary { |
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///////////////////////////////////////////////////////////////////////////////
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// ParameterAutomation
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///////////////////////////////////////////////////////////////////////////////
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constexpr int LINEAR_SLOPE = 0; |
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constexpr float EXPONENTIAL_K = 5.0f; |
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constexpr float EXP_EXPONENTIAL_K = expf(EXPONENTIAL_K); |
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template <class T> |
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ParameterAutomation<T>::ParameterAutomation() |
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{ |
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reconfigure(0.0f, 0.0f, static_cast<size_t>(0), Function::NOT_CONFIGURED); |
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} |
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template <class T> |
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ParameterAutomation<T>::ParameterAutomation(T startValue, T endValue, float durationMilliseconds, Function function) |
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{ |
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reconfigure(startValue, endValue, calcAudioSamples(durationMilliseconds), function); |
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} |
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template <class T> |
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ParameterAutomation<T>::ParameterAutomation(T startValue, T endValue, size_t durationSamples, Function function) |
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{ |
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reconfigure(startValue, endValue, durationSamples, function); |
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} |
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template <class T> |
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ParameterAutomation<T>::~ParameterAutomation() |
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{ |
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} |
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template <class T> |
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void ParameterAutomation<T>::reconfigure(T startValue, T endValue, float durationMilliseconds, Function function) |
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{ |
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reconfigure(startValue, endValue, calcAudioSamples(durationMilliseconds), function); |
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} |
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template <class T> |
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void ParameterAutomation<T>::reconfigure(T startValue, T endValue, size_t durationSamples, Function function) |
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{ |
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m_function = function; |
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m_startValue = startValue; |
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m_endValue = endValue; |
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m_currentValueX = 0.0f; |
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m_duration = durationSamples; |
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m_running = false; |
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float duration = m_duration / static_cast<float>(AUDIO_BLOCK_SAMPLES); |
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m_slopeX = (1.0f / static_cast<float>(duration)); |
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m_scaleY = abs(endValue - startValue); |
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if (endValue >= startValue) { |
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// value is increasing
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m_positiveSlope = true; |
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} else { |
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// value is decreasing
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m_positiveSlope = false; |
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} |
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} |
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template <class T> |
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void ParameterAutomation<T>::trigger() |
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{ |
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m_currentValueX = 0.0f; |
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m_running = true; |
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} |
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template <class T> |
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T ParameterAutomation<T>::getNextValue() |
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{ |
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if (m_running == false) { |
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return m_startValue; |
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} |
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m_currentValueX += m_slopeX; |
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float value; |
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float returnValue; |
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switch(m_function) { |
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case Function::EXPONENTIAL : |
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if (m_positiveSlope) { |
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// Growth: f(x) = exp(k*x) / exp(k)
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value = expf(EXPONENTIAL_K*m_currentValueX) / EXP_EXPONENTIAL_K; |
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} else { |
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// Decay: f(x) = 1 - exp(-k*x)
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value = 1.0f - expf(-EXPONENTIAL_K*m_currentValueX); |
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} |
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break; |
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case Function::PARABOLIC : |
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value = m_currentValueX*m_currentValueX; |
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break; |
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case Function::LOOKUP_TABLE : |
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case Function::LINEAR : |
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default : |
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value = m_currentValueX; |
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break; |
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} |
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// Check if the automation is finished.
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if (m_currentValueX >= 1.0f) { |
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m_currentValueX = 0.0f; |
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m_running = false; |
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return m_endValue; |
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} |
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if (m_positiveSlope) { |
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returnValue = m_startValue + (m_scaleY*value); |
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} else { |
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returnValue = m_startValue - (m_scaleY*value); |
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} |
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// Serial.println(String("Start/End values: ") + m_startValue + String(":") + m_endValue);
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//Serial.print("Parameter m_currentValueX is "); Serial.println(m_currentValueX, 6);
|
||||
//Serial.print("Parameter returnValue is "); Serial.println(returnValue, 6);
|
||||
return returnValue; |
||||
} |
||||
|
||||
// Template instantiation
|
||||
template class ParameterAutomation<float>; |
||||
template class ParameterAutomation<int>; |
||||
template class ParameterAutomation<unsigned>; |
||||
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
// ParameterAutomationSequence
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
template <class T> |
||||
ParameterAutomationSequence<T>::ParameterAutomationSequence(int numStages) |
||||
{ |
||||
if (numStages < MAX_PARAMETER_SEQUENCES) { |
||||
for (int i=0; i<numStages; i++) { |
||||
m_paramArray[i] = new ParameterAutomation<T>(); |
||||
} |
||||
for (int i=numStages; i<MAX_PARAMETER_SEQUENCES; i++) { |
||||
m_paramArray[i] = nullptr; |
||||
} |
||||
m_numStages = numStages; |
||||
} |
||||
} |
||||
|
||||
template <class T> |
||||
ParameterAutomationSequence<T>::~ParameterAutomationSequence() |
||||
{ |
||||
for (int i=0; i<m_numStages; i++) { |
||||
if (m_paramArray[i]) { |
||||
delete m_paramArray[i]; |
||||
} |
||||
} |
||||
} |
||||
|
||||
template <class T> |
||||
void ParameterAutomationSequence<T>::setupParameter(int index, T startValue, T endValue, size_t durationSamples, typename ParameterAutomation<T>::Function function) |
||||
{ |
||||
Serial.println(String("setupParameter() called with samples: ") + durationSamples); |
||||
m_paramArray[index]->reconfigure(startValue, endValue, durationSamples, function); |
||||
m_currentIndex = 0; |
||||
} |
||||
|
||||
template <class T> |
||||
void ParameterAutomationSequence<T>::setupParameter(int index, T startValue, T endValue, float durationMilliseconds, typename ParameterAutomation<T>::Function function) |
||||
{ |
||||
Serial.print(String("setupParameter() called with time: ")); Serial.println(durationMilliseconds, 6); |
||||
m_paramArray[index]->reconfigure(startValue, endValue, durationMilliseconds, function); |
||||
m_currentIndex = 0; |
||||
} |
||||
|
||||
template <class T> |
||||
void ParameterAutomationSequence<T>::trigger(void) |
||||
{ |
||||
m_currentIndex = 0; |
||||
m_paramArray[0]->trigger(); |
||||
m_running = true; |
||||
//Serial.println("ParameterAutomationSequence<T>::trigger() called");
|
||||
} |
||||
|
||||
template <class T> |
||||
T ParameterAutomationSequence<T>::getNextValue() |
||||
{ |
||||
// Get the next value
|
||||
T nextValue = m_paramArray[m_currentIndex]->getNextValue(); |
||||
|
||||
if (m_running) { |
||||
//Serial.println(String("ParameterAutomationSequence<T>::getNextValue() is ") + nextValue
|
||||
// + String(" from stage ") + m_currentIndex);
|
||||
|
||||
// If current stage is done, trigger the next
|
||||
if (m_paramArray[m_currentIndex]->isFinished()) { |
||||
Serial.println(String("Finished stage ") + m_currentIndex); |
||||
m_currentIndex++; |
||||
|
||||
if (m_currentIndex >= m_numStages) { |
||||
// Last stage already finished
|
||||
Serial.println("Last stage finished"); |
||||
m_running = false; |
||||
m_currentIndex = 0; |
||||
} else { |
||||
// trigger the next stage
|
||||
m_paramArray[m_currentIndex]->trigger(); |
||||
} |
||||
} |
||||
} |
||||
|
||||
return nextValue; |
||||
} |
||||
|
||||
template <class T> |
||||
bool ParameterAutomationSequence<T>::isFinished() |
||||
{ |
||||
return !m_running; |
||||
} |
||||
|
||||
// Template instantiation
|
||||
template class ParameterAutomationSequence<float>; |
||||
template class ParameterAutomationSequence<int>; |
||||
template class ParameterAutomationSequence<unsigned>; |
||||
|
||||
} |
||||
@ -0,0 +1,304 @@ |
||||
/*
|
||||
* AudioEffectSOS.cpp |
||||
* |
||||
* Created on: Apr 14, 2018 |
||||
* Author: blackaddr |
||||
*/ |
||||
|
||||
#include "AudioEffectSOS.h" |
||||
#include "LibBasicFunctions.h" |
||||
|
||||
using namespace BALibrary; |
||||
|
||||
namespace BAEffects { |
||||
|
||||
constexpr int MIDI_CHANNEL = 0; |
||||
constexpr int MIDI_CONTROL = 1; |
||||
|
||||
constexpr float MAX_GATE_OPEN_TIME_MS = 3000.0f; |
||||
constexpr float MAX_GATE_CLOSE_TIME_MS = 1000.0f; |
||||
|
||||
constexpr int GATE_OPEN_STAGE = 0; |
||||
constexpr int GATE_HOLD_STAGE = 1; |
||||
constexpr int GATE_CLOSE_STAGE = 2; |
||||
|
||||
AudioEffectSOS::AudioEffectSOS(float maxDelayMs) |
||||
: AudioStream(1, m_inputQueueArray) |
||||
{ |
||||
m_memory = new AudioDelay(maxDelayMs); |
||||
m_maxDelaySamples = calcAudioSamples(maxDelayMs); |
||||
m_externalMemory = false; |
||||
} |
||||
|
||||
AudioEffectSOS::AudioEffectSOS(size_t numSamples) |
||||
: AudioStream(1, m_inputQueueArray) |
||||
{ |
||||
m_memory = new AudioDelay(numSamples); |
||||
m_maxDelaySamples = numSamples; |
||||
m_externalMemory = false; |
||||
} |
||||
|
||||
AudioEffectSOS::AudioEffectSOS(ExtMemSlot *slot) |
||||
: AudioStream(1, m_inputQueueArray) |
||||
{ |
||||
m_memory = new AudioDelay(slot); |
||||
m_externalMemory = true; |
||||
} |
||||
|
||||
AudioEffectSOS::~AudioEffectSOS() |
||||
{ |
||||
if (m_memory) delete m_memory; |
||||
} |
||||
|
||||
void AudioEffectSOS::setGateLedGpio(int pinId) |
||||
{ |
||||
m_gateLedPinId = pinId; |
||||
pinMode(static_cast<uint8_t>(m_gateLedPinId), OUTPUT); |
||||
} |
||||
|
||||
void AudioEffectSOS::enable(void) |
||||
{ |
||||
m_enable = true; |
||||
if (m_externalMemory) { |
||||
// Because we hold the previous output buffer for an update cycle, the maximum delay is actually
|
||||
// 1 audio block mess then the max delay returnable from the memory.
|
||||
m_maxDelaySamples = m_memory->getMaxDelaySamples(); |
||||
Serial.println(String("SOS Enabled with delay length ") + m_maxDelaySamples + String(" samples")); |
||||
} |
||||
m_delaySamples = m_maxDelaySamples; |
||||
m_inputGateAuto.setupParameter(GATE_OPEN_STAGE, 0.0f, 1.0f, 1000.0f, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
m_inputGateAuto.setupParameter(GATE_HOLD_STAGE, 1.0f, 1.0f, m_maxDelaySamples, ParameterAutomation<float>::Function::HOLD); |
||||
m_inputGateAuto.setupParameter(GATE_CLOSE_STAGE, 1.0f, 0.0f, 1000.0f, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
|
||||
m_clearFeedbackAuto.setupParameter(GATE_OPEN_STAGE, 1.0f, 0.0f, 1000.0f, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
m_clearFeedbackAuto.setupParameter(GATE_HOLD_STAGE, 0.0f, 0.0f, m_maxDelaySamples, ParameterAutomation<float>::Function::HOLD); |
||||
m_clearFeedbackAuto.setupParameter(GATE_CLOSE_STAGE, 0.0f, 1.0f, 1000.0f, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
} |
||||
|
||||
void AudioEffectSOS::update(void) |
||||
{ |
||||
audio_block_t *inputAudioBlock = receiveReadOnly(); // get the next block of input samples
|
||||
|
||||
// Check is block is disabled
|
||||
if (m_enable == false) { |
||||
// do not transmit or process any audio, return as quickly as possible.
|
||||
if (inputAudioBlock) release(inputAudioBlock); |
||||
|
||||
// release all held memory resources
|
||||
if (m_previousBlock) { |
||||
release(m_previousBlock); m_previousBlock = nullptr; |
||||
} |
||||
if (!m_externalMemory) { |
||||
// when using internal memory we have to release all references in the ring buffer
|
||||
while (m_memory->getRingBuffer()->size() > 0) { |
||||
audio_block_t *releaseBlock = m_memory->getRingBuffer()->front(); |
||||
m_memory->getRingBuffer()->pop_front(); |
||||
if (releaseBlock) release(releaseBlock); |
||||
} |
||||
} |
||||
return; |
||||
} |
||||
|
||||
// Check is block is bypassed, if so either transmit input directly or create silence
|
||||
if ( (m_bypass == true) || (!inputAudioBlock) ) { |
||||
// transmit the input directly
|
||||
if (!inputAudioBlock) { |
||||
// create silence
|
||||
inputAudioBlock = allocate(); |
||||
if (!inputAudioBlock) { return; } // failed to allocate
|
||||
else { |
||||
clearAudioBlock(inputAudioBlock); |
||||
} |
||||
} |
||||
transmit(inputAudioBlock, 0); |
||||
release(inputAudioBlock); |
||||
return; |
||||
} |
||||
|
||||
if (!inputAudioBlock) return; |
||||
|
||||
// Otherwise perform normal processing
|
||||
// In order to make use of the SPI DMA, we need to request the read from memory first,
|
||||
// then do other processing while it fills in the back.
|
||||
audio_block_t *blockToOutput = nullptr; // this will hold the output audio
|
||||
blockToOutput = allocate(); |
||||
if (!blockToOutput) return; // skip this update cycle due to failure
|
||||
|
||||
// get the data. If using external memory with DMA, this won't be filled until
|
||||
// later.
|
||||
m_memory->getSamples(blockToOutput, m_delaySamples); |
||||
//Serial.println(String("Delay samples:") + m_delaySamples);
|
||||
//Serial.println(String("Use dma: ") + m_memory->getSlot()->isUseDma());
|
||||
|
||||
// If using DMA, we need something else to do while that read executes, so
|
||||
// move on to input preprocessing
|
||||
|
||||
// Preprocessing
|
||||
audio_block_t *preProcessed = allocate(); |
||||
// mix the input with the feedback path in the pre-processing stage
|
||||
m_preProcessing(preProcessed, inputAudioBlock, m_previousBlock); |
||||
|
||||
// consider doing the BBD post processing here to use up more time while waiting
|
||||
// for the read data to come back
|
||||
audio_block_t *blockToRelease = m_memory->addBlock(preProcessed); |
||||
//audio_block_t *blockToRelease = m_memory->addBlock(inputAudioBlock);
|
||||
//Serial.println("Done adding new block");
|
||||
|
||||
|
||||
// BACK TO OUTPUT PROCESSING
|
||||
// Check if external DMA, if so, we need to be sure the read is completed
|
||||
if (m_externalMemory && m_memory->getSlot()->isUseDma()) { |
||||
// Using DMA
|
||||
while (m_memory->getSlot()->isReadBusy()) {} |
||||
} |
||||
|
||||
// perform the wet/dry mix mix
|
||||
m_postProcessing(blockToOutput, blockToOutput); |
||||
transmit(blockToOutput); |
||||
|
||||
release(inputAudioBlock); |
||||
|
||||
if (m_previousBlock) |
||||
release(m_previousBlock); |
||||
m_previousBlock = blockToOutput; |
||||
|
||||
if (m_blockToRelease == m_previousBlock) { |
||||
Serial.println("ERROR: POINTER COLLISION"); |
||||
} |
||||
|
||||
if (m_blockToRelease) release(m_blockToRelease); |
||||
m_blockToRelease = blockToRelease; |
||||
} |
||||
|
||||
|
||||
void AudioEffectSOS::gateOpenTime(float milliseconds) |
||||
{ |
||||
// TODO - change the paramter automation to an automation sequence
|
||||
m_openTimeMs = milliseconds; |
||||
m_inputGateAuto.setupParameter(GATE_OPEN_STAGE, 0.0f, 1.0f, m_openTimeMs, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
//m_clearFeedbackAuto.setupParameter(GATE_OPEN_STAGE, 1.0f, 0.0f, m_openTimeMs, ParameterAutomation<float>::Function::EXPONENTIAL);
|
||||
} |
||||
|
||||
void AudioEffectSOS::gateCloseTime(float milliseconds) |
||||
{ |
||||
m_closeTimeMs = milliseconds; |
||||
m_inputGateAuto.setupParameter(GATE_CLOSE_STAGE, 1.0f, 0.0f, m_closeTimeMs, ParameterAutomation<float>::Function::EXPONENTIAL); |
||||
//m_clearFeedbackAuto.setupParameter(GATE_CLOSE_STAGE, 0.0f, 1.0f, m_closeTimeMs, ParameterAutomation<float>::Function::EXPONENTIAL);
|
||||
} |
||||
|
||||
////////////////////////////////////////////////////////////////////////
|
||||
// MIDI PROCESSING
|
||||
////////////////////////////////////////////////////////////////////////
|
||||
void AudioEffectSOS::processMidi(int channel, int control, int value) |
||||
{ |
||||
|
||||
float val = (float)value / 127.0f; |
||||
|
||||
if ((m_midiConfig[GATE_OPEN_TIME][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[GATE_OPEN_TIME][MIDI_CONTROL] == control)) { |
||||
// Gate Open Time
|
||||
gateOpenTime(val * MAX_GATE_OPEN_TIME_MS); |
||||
Serial.println(String("AudioEffectSOS::gate open time (ms): ") + m_openTimeMs); |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[GATE_CLOSE_TIME][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[GATE_CLOSE_TIME][MIDI_CONTROL] == control)) { |
||||
// Gate Close Time
|
||||
gateCloseTime(val * MAX_GATE_CLOSE_TIME_MS); |
||||
Serial.println(String("AudioEffectSOS::gate close time (ms): ") + m_closeTimeMs); |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[FEEDBACK][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[FEEDBACK][MIDI_CONTROL] == control)) { |
||||
// Feedback
|
||||
Serial.println(String("AudioEffectSOS::feedback: ") + 100*val + String("%")); |
||||
feedback(val); |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[VOLUME][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[VOLUME][MIDI_CONTROL] == control)) { |
||||
// Volume
|
||||
Serial.println(String("AudioEffectSOS::volume: ") + 100*val + String("%")); |
||||
volume(val); |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[BYPASS][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[BYPASS][MIDI_CONTROL] == control)) { |
||||
// Bypass
|
||||
if (value >= 65) { bypass(false); Serial.println(String("AudioEffectSOS::not bypassed -> ON") + value); } |
||||
else { bypass(true); Serial.println(String("AudioEffectSOS::bypassed -> OFF") + value); } |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[GATE_TRIGGER][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[GATE_TRIGGER][MIDI_CONTROL] == control)) { |
||||
// The gate is triggered by any value
|
||||
Serial.println(String("AudioEffectSOS::Gate Triggered!")); |
||||
m_inputGateAuto.trigger(); |
||||
return; |
||||
} |
||||
|
||||
if ((m_midiConfig[CLEAR_FEEDBACK_TRIGGER][MIDI_CHANNEL] == channel) && |
||||
(m_midiConfig[CLEAR_FEEDBACK_TRIGGER][MIDI_CONTROL] == control)) { |
||||
// The gate is triggered by any value
|
||||
Serial.println(String("AudioEffectSOS::Clear feedback Triggered!")); |
||||
m_clearFeedbackAuto.trigger(); |
||||
return; |
||||
} |
||||
} |
||||
|
||||
void AudioEffectSOS::mapMidiControl(int parameter, int midiCC, int midiChannel) |
||||
{ |
||||
if (parameter >= NUM_CONTROLS) { |
||||
return ; // Invalid midi parameter
|
||||
} |
||||
m_midiConfig[parameter][MIDI_CHANNEL] = midiChannel; |
||||
m_midiConfig[parameter][MIDI_CONTROL] = midiCC; |
||||
} |
||||
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
// PRIVATE FUNCTIONS
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
void AudioEffectSOS::m_preProcessing (audio_block_t *out, audio_block_t *input, audio_block_t *delayedSignal) |
||||
{ |
||||
if ( out && input && delayedSignal) { |
||||
// Multiply the input signal by the automated gate value
|
||||
// Multiply the delayed signal by the user set feedback value
|
||||
// Then combine the two
|
||||
|
||||
float gateVol = m_inputGateAuto.getNextValue(); |
||||
float feedbackAdjust = m_clearFeedbackAuto.getNextValue(); |
||||
audio_block_t tempAudioBuffer; |
||||
|
||||
gainAdjust(out, input, gateVol, 0); // last paremeter is coeff shift, 0 bits
|
||||
gainAdjust(&tempAudioBuffer, delayedSignal, m_feedback*feedbackAdjust, 0); // last parameter is coeff shift, 0 bits
|
||||
combine(out, out, &tempAudioBuffer); |
||||
|
||||
} else if (input) { |
||||
memcpy(out->data, input->data, sizeof(int16_t) * AUDIO_BLOCK_SAMPLES); |
||||
} |
||||
|
||||
// Update the gate LED
|
||||
if (m_gateLedPinId >= 0) { |
||||
if (m_inputGateAuto.isFinished() && m_clearFeedbackAuto.isFinished()) { |
||||
digitalWriteFast(m_gateLedPinId, 0x0); |
||||
} else { |
||||
digitalWriteFast(m_gateLedPinId, 0x1); |
||||
} |
||||
} |
||||
} |
||||
|
||||
void AudioEffectSOS::m_postProcessing(audio_block_t *out, audio_block_t *in) |
||||
{ |
||||
gainAdjust(out, out, m_volume, 0); |
||||
} |
||||
|
||||
|
||||
} // namespace BAEffects
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in new issue