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126 lines
4.3 KiB
126 lines
4.3 KiB
/**************************************************************************//**
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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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* Tremolo is a classic volume modulate effect.
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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__BAEFFECTS_AUDIOEFFECTDELAYEXTERNAL_H; 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_AUDIOEFFECTTREMOLO_H
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#define __BAEFFECTS_AUDIOEFFECTTREMOLO_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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* AudioEffectTremolo
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*****************************************************************************/
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class AudioEffectTremolo : public AudioStream {
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public:
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///< List of AudioEffectTremolo MIDI controllable parameters
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enum {
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BYPASS = 0, ///< controls effect bypass
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RATE, ///< controls the rate of the modulation
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DEPTH, ///< controls the depth of the modulation
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WAVEFORM, ///< select the modulation waveform
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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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AudioEffectTremolo();
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virtual ~AudioEffectTremolo(); ///< Destructor
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// *** PARAMETERS ***
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void rate(float rateValue);
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void depth(float depthValue) { m_depth = depthValue; }
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void setWaveform(BALibrary::Waveform waveform);
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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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/// Get if the effect is bypassed
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/// @returns true if bypassed, false if not bypassed
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bool isBypass() { return m_bypass; }
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/// Toggle the bypass effect
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void toggleBypass() { m_bypass = !m_bypass; }
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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() { m_enable = true; }
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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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BALibrary::LowFrequencyOscillatorVector<float> m_osc;
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int m_midiConfig[NUM_CONTROLS][2]; // stores the midi parameter mapping
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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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float m_rate = 0.0f;
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float m_depth = 0.0f;
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BALibrary::Waveform m_waveform = BALibrary::Waveform::SINE;
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float m_volume = 1.0f;
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};
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}
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#endif /* __BAEFFECTS_AUDIOEFFECTTREMOLO_H */
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