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BALibrary/src/AudioEffectSOS.h

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/**************************************************************************//**
* @file
* @author Steve Lascos
* @company Blackaddr Audio
*
* AudioEffectSOS is a class f
*
* @copyright 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/>.
*****************************************************************************/
#ifndef __BAEFFECTS_BAAUDIOEFFECTSOS_H
#define __BAEFFECTS_BAAUDIOEFFECTSOS_H
#include <Audio.h>
#include "LibBasicFunctions.h"
namespace BAEffects {
/**************************************************************************//**
* AudioEffectSOS
*****************************************************************************/
class AudioEffectSOS : public AudioStream {
public:
///< List of AudioEffectAnalogDelay MIDI controllable parameters
enum {
BYPASS = 0, ///< controls effect bypass
GATE_TRIGGER, ///< begins the gate sequence
GATE_OPEN_TIME, ///< controls how long it takes to open the gate
//GATE_HOLD_TIME, ///< controls how long the gate stays open at unity
GATE_CLOSE_TIME, ///< controls how long it takes to close the gate (release)
CLEAR_FEEDBACK_TRIGGER, ///< begins the sequence to clear out the looping feedback
FEEDBACK, ///< controls the amount of feedback, more gives longer SOS sustain
VOLUME, ///< controls the output volume level
NUM_CONTROLS ///< this can be used as an alias for the number of MIDI controls
};
// *** CONSTRUCTORS ***
AudioEffectSOS() = delete;
AudioEffectSOS(float maxDelayMs);
AudioEffectSOS(size_t numSamples);
/// Construct an analog delay using external SPI via an ExtMemSlot. The amount of
/// delay will be determined by the amount of memory in the slot.
/// @param slot A pointer to the ExtMemSlot to use for the delay.
AudioEffectSOS(BALibrary::ExtMemSlot *slot); // requires sufficiently sized pre-allocated memory
virtual ~AudioEffectSOS(); ///< Destructor
void setGateLedGpio(int pinId);
// *** PARAMETERS ***
void gateOpenTime(float milliseconds);
void gateCloseTime(float milliseconds);
void feedback(float feedback) { m_feedback = feedback; }
/// Bypass the effect.
/// @param byp when true, bypass wil disable the effect, when false, effect is enabled.
/// Note that audio still passes through when bypass is enabled.
void bypass(bool byp) { m_bypass = byp; }
/// Activate the gate automation. Input gate will open, then close.
void trigger() { m_inputGateAuto.trigger(); }
/// Activate the delay clearing automation. Input signal will mute, gate will open, then close.
void clear() { m_clearFeedbackAuto.trigger(); }
/// Set the output volume. This affect both the wet and dry signals.
/// @details The default is 1.0.
/// @param vol Sets the output volume between -1.0 and +1.0
void volume(float vol) {m_volume = vol; }
// ** ENABLE / DISABLE **
/// Enables audio processing. Note: when not enabled, CPU load is nearly zero.
void enable();
/// Disables audio process. When disabled, CPU load is nearly zero.
void disable() { m_enable = false; }
// ** MIDI **
/// Sets whether MIDI OMNI channel is processig on or off. When on,
/// all midi channels are used for matching CCs.
/// @param isOmni when true, all channels are processed, when false, channel
/// must match configured value.
void setMidiOmni(bool isOmni) { m_isOmni = isOmni; }
/// Configure an effect parameter to be controlled by a MIDI CC
/// number on a particular channel.
/// @param parameter one of the parameter names in the class enum
/// @param midiCC the CC number from 0 to 127
/// @param midiChannel the effect will only response to the CC on this channel
/// when OMNI mode is off.
void mapMidiControl(int parameter, int midiCC, int midiChannel = 0);
/// process a MIDI Continous-Controller (CC) message
/// @param channel the MIDI channel from 0 to 15)
/// @param midiCC the CC number from 0 to 127
/// @param value the CC value from 0 to 127
void processMidi(int channel, int midiCC, int value);
virtual void update(void); ///< update automatically called by the Teesny Audio Library
private:
audio_block_t *m_inputQueueArray[1];
bool m_isOmni = false;
bool m_bypass = true;
bool m_enable = false;
BALibrary::AudioDelay *m_memory = nullptr;
bool m_externalMemory = true;
audio_block_t *m_previousBlock = nullptr;
audio_block_t *m_blockToRelease = nullptr;
size_t m_maxDelaySamples = 0;
int m_gateLedPinId = -1;
// Controls
int m_midiConfig[NUM_CONTROLS][2]; // stores the midi parameter mapping
size_t m_delaySamples = 0;
float m_openTimeMs = 0.0f;
float m_closeTimeMs = 0.0f;
float m_feedback = 0.0f;
float m_volume = 1.0f;
// Automated Controls
BALibrary::ParameterAutomationSequence<float> m_inputGateAuto = BALibrary::ParameterAutomationSequence<float>(3);
BALibrary::ParameterAutomationSequence<float> m_clearFeedbackAuto = BALibrary::ParameterAutomationSequence<float>(3);
// Private functions
void m_preProcessing (audio_block_t *out, audio_block_t *input, audio_block_t *delayedSignal);
void m_postProcessing(audio_block_t *out, audio_block_t *input);
};
}
#endif /* __BAEFFECTS_BAAUDIOEFFECTSOS_H */