Dooho Yi
91f92c0e6c
migration from 'smp_v1p0' dev. for 'sampler' -> skip irrelavant note msg. and keep playing
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
/* Audio Library for Teensy 3.X
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* Copyright (c) 2017, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef effect_envelope_h_
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#define effect_envelope_h_
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#include "Arduino.h"
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#include "AudioStream.h"
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#include "utility/dspinst.h"
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#define SAMPLES_PER_MSEC (AUDIO_SAMPLE_RATE_EXACT/1000.0)
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class AudioEffectEnvelope : public AudioStream
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{
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public:
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AudioEffectEnvelope() : AudioStream(1, inputQueueArray) {
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state = 0;
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delay(0.0f); // default values...
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attack(10.5f);
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hold(2.5f);
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decay(35.0f);
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sustain(0.5f);
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release(300.0f);
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releaseNoteOn(5.0f);
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}
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void noteOn();
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void noteOff();
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void delay(float milliseconds) {
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delay_count = milliseconds2count(milliseconds);
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}
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void attack(float milliseconds) {
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attack_count = milliseconds2count(milliseconds);
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if (attack_count == 0) attack_count = 1;
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}
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void hold(float milliseconds) {
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hold_count = milliseconds2count(milliseconds);
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}
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void decay(float milliseconds) {
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decay_count = milliseconds2count(milliseconds);
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if (decay_count == 0) decay_count = 1;
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}
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void sustain(float level) {
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if (level < 0.0) level = 0;
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else if (level > 1.0) level = 1.0;
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sustain_mult = level * 1073741824.0;
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}
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void release(float milliseconds) {
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release_count = milliseconds2count(milliseconds);
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if (release_count == 0) release_count = 1;
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}
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void releaseNoteOn(float milliseconds) {
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release_forced_count = milliseconds2count(milliseconds);
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if (release_count == 0) release_count = 1;
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}
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bool isActive();
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bool isSustain();
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using AudioStream::release;
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virtual void update(void);
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private:
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uint16_t milliseconds2count(float milliseconds) {
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if (milliseconds < 0.0) milliseconds = 0.0;
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uint32_t c = ((uint32_t)(milliseconds*SAMPLES_PER_MSEC)+7)>>3;
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if (c > 65535) c = 65535; // allow up to 11.88 seconds
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return c;
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}
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audio_block_t *inputQueueArray[1];
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// state
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uint8_t state; // idle, delay, attack, hold, decay, sustain, release, forced
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uint16_t count; // how much time remains in this state, in 8 sample units
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int32_t mult_hires; // attenuation, 0=off, 0x40000000=unity gain
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int32_t inc_hires; // amount to change mult_hires every 8 samples
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// settings
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uint16_t delay_count;
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uint16_t attack_count;
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uint16_t hold_count;
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uint16_t decay_count;
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int32_t sustain_mult;
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uint16_t release_count;
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uint16_t release_forced_count;
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};
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#undef SAMPLES_PER_MSEC
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#endif
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