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Added simple synth example with Mono Last operation.

This commit is contained in:
Francois Best 2014-05-20 10:08:44 +02:00
parent d13353a5b6
commit bde05f4a6f
4 changed files with 527 additions and 0 deletions
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81
res/Examples/MIDI_SimpleSynth/MIDI_SimpleSynth.ino Normal file
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#include <MIDI.h>
#include "noteList.h"
#include "pitches.h"
#ifdef ARDUINO_SAM_DUE // Due has no tone function (yet), overriden to prevent build errors.
#define tone(...)
#define noTone(...)
#endif
// This example shows how to make a simple synth out of an Arduino, using the
// tone() function. It also outputs a gate signal for controlling external
// analog synth components (like envelopes).
static const unsigned sGatePin = 13;
static const unsigned sAudioOutPin = 10;
static const unsigned sMaxNumNotes = 16;
MidiNoteList<sMaxNumNotes> midiNotes;
// -----------------------------------------------------------------------------
void handleGateChanged(bool inGateActive)
{
digitalWrite(sGatePin, inGateActive ? HIGH : LOW);
}
void pulseGate()
{
handleGateChanged(false);
delay(1);
handleGateChanged(true);
}
// -----------------------------------------------------------------------------
void handleNotesChanged()
{
if (midiNotes.empty())
{
handleGateChanged(false);
noTone(sAudioOutPin);
}
else
{
byte currentNote = 0;
if (midiNotes.getTail(currentNote))
{
tone(sAudioOutPin, sNotePitches[currentNote]);
pulseGate(); // Retrigger envelopes. Remove for legato effect.
}
}
}
// -----------------------------------------------------------------------------
void handleNoteOn(byte inChannel, byte inNote, byte inVelocity)
{
midiNotes.add(MidiNote(inNote, inVelocity));
handleNotesChanged();
}
void handleNoteOff(byte inChannel, byte inNote, byte inVelocity)
{
midiNotes.remove(inNote);
handleNotesChanged();
}
// -----------------------------------------------------------------------------
void setup()
{
pinMode(sGatePin, OUTPUT);
pinMode(sAudioOutPin, OUTPUT);
MIDI.setHandleNoteOn(handleNoteOn);
MIDI.setHandleNoteOff(handleNoteOff);
MIDI.begin();
}
void loop()
{
MIDI.read();
}

21
res/Examples/MIDI_SimpleSynth/noteList.cpp Normal file
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/*!
* \file synth-core_NoteList.h
* \author Francois Best
* \date 24/05/2013
* \license GPL v3.0 - Copyright Forty Seven Effects 2013
*
* 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/>.
*/
#include "noteList.h"

317
res/Examples/MIDI_SimpleSynth/noteList.h Normal file
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/*!
* \file synth-core_NoteList.h
* \author Francois Best
* \date 24/05/2013
* \license GPL v3.0 - Copyright Forty Seven Effects 2013
*
* 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/>.
*/
#pragma once
#include <inttypes.h>
typedef uint8_t byte;
// -----------------------------------------------------------------------------
struct MidiNote
{
inline MidiNote();
inline MidiNote(byte inPitch, byte inVelocity);
inline MidiNote(const MidiNote& inOther);
inline MidiNote& operator= (const MidiNote& inOther);
byte pitch;
byte velocity;
};
// -----------------------------------------------------------------------------
template<byte Size>
class MidiNoteList
{
private:
struct Cell
{
inline Cell();
inline Cell(const Cell& inOther);
inline Cell& operator= (const Cell& inOther);
MidiNote note;
bool active;
Cell* next;
Cell* prev;
};
public:
inline MidiNoteList();
inline ~MidiNoteList();
public:
inline void add(const MidiNote& inNote);
inline void remove(byte inPitch);
public:
inline bool get(byte inIndex, byte& outPitch) const;
inline bool getTail(byte& outPitch) const;
public:
inline bool empty() const;
inline byte size() const;
private:
inline Cell* getFirstEmptyCell();
inline void print() const;
private:
Cell mArray[Size];
Cell* mHead;
Cell* mTail;
byte mSize;
};
// ########################################################################## //
// Inline implementation
inline MidiNote::MidiNote()
: pitch(0)
, velocity(0)
{
}
inline MidiNote::MidiNote(byte inPitch, byte inVelocity)
: pitch(inPitch)
, velocity(inVelocity)
{
}
inline MidiNote::MidiNote(const MidiNote& inOther)
: pitch(inOther.pitch)
, velocity(inOther.velocity)
{
}
inline MidiNote& MidiNote::operator= (const MidiNote& inOther)
{
pitch = inOther.pitch;
velocity = inOther.velocity;
return *this;
}
// ########################################################################## //
template<byte Size>
inline MidiNoteList<Size>::Cell::Cell()
: note()
, active(false)
, next(0)
, prev(0)
{
}
template<byte Size>
inline MidiNoteList<Size>::Cell::Cell(const Cell& inOther)
: note(inOther.note)
, active(inOther.active)
, next(inOther.next)
, prev(inOther.prev)
{
}
template<byte Size>
inline typename MidiNoteList<Size>::Cell& MidiNoteList<Size>::Cell::operator= (const Cell& inOther)
{
note = inOther.note;
active = inOther.active;
next = inOther.next;
prev = inOther.prev;
return *this;
}
// ########################################################################## //
template<byte Size>
inline MidiNoteList<Size>::MidiNoteList()
{
// Check that size is a power of two
//AVR_STATIC_ASSERT(Size != 0 && !(Size & (Size - 1)));
}
template<byte Size>
inline MidiNoteList<Size>::~MidiNoteList()
{
}
// -----------------------------------------------------------------------------
template<byte Size>
inline void MidiNoteList<Size>::add(const MidiNote& inNote)
{
if (mHead == 0)
{
mArray[0].note = inNote;
mArray[0].active = true;
mArray[0].next = 0;
mArray[0].prev = 0;
mHead = mArray;
mTail = mArray;
}
else
{
// Find the first inactive cell, and use it as tail.
Cell* const oldTail = mTail;
Cell* const newTail = getFirstEmptyCell();
newTail->active = true;
newTail->note = inNote;
oldTail->next = newTail;
newTail->prev = oldTail;
newTail->next = 0;
mTail = newTail;
}
mSize++;
print();
}
template<byte Size>
inline void MidiNoteList<Size>::remove(byte inPitch)
{
if (mHead != 0)
{
for (Cell* it = mHead; it != 0; it = it->next)
{
if (it->note.pitch == inPitch)
{
Cell* const prev = it->prev;
Cell* const next = it->next;
it->active = false;
it->next = 0;
it->prev = 0;
// Reconnect both ends
if (it == mHead)
{
//AVR_ASSERT(prev == 0);
mHead = next;
}
else
{
//AVR_ASSERT(prev != 0);
prev->next = next;
}
if (it == mTail)
{
//AVR_ASSERT(next == 0);
mTail = prev;
}
else
{
//AVR_ASSERT(next != 0);
next->prev = prev;
}
mSize--;
break;
}
}
}
print();
}
// -----------------------------------------------------------------------------
template<byte Size>
inline bool MidiNoteList<Size>::get(byte inIndex, byte& outPitch) const
{
if (mTail)
{
const Cell* it = mTail;
for (byte i = 0; i < inIndex; ++i)
{
if (it->prev)
{
it = it->prev;
}
}
print();
//AVR_LOG("Index " << inIndex << ": " << it->note.pitch);
outPitch = it->note.pitch;
return true;
}
return false;
}
template<byte Size>
inline bool MidiNoteList<Size>::getTail(byte& outPitch) const
{
if (mTail)
{
outPitch = mTail->note.pitch;
return true;
}
return false;
}
// -----------------------------------------------------------------------------
template<byte Size>
inline bool MidiNoteList<Size>::empty() const
{
return mSize == 0;
}
template<byte Size>
inline byte MidiNoteList<Size>::size() const
{
return mSize;
}
// -----------------------------------------------------------------------------
template<byte Size>
inline typename MidiNoteList<Size>::Cell* MidiNoteList<Size>::getFirstEmptyCell()
{
for (byte i = 0; i < Size; ++i)
{
if (mArray[i].active == false)
{
return mArray + i;
}
}
return 0;
}
template<byte Size>
inline void MidiNoteList<Size>::print() const
{
//#ifndef NDEBUG
// AVR_DBG("Note List: [ ");
// if (mHead)
// {
// for (const Cell* it = mHead; it != 0; it = it->next)
// {
// AVR_DBG(it->note.pitch);
// if (it->next)
// AVR_DBG(" -> ");
// }
// }
// AVR_LOG(" ]");
//#endif
}

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res/Examples/MIDI_SimpleSynth/pitches.h Normal file
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/*************************************************
* Public Constants
*************************************************/
#include <inttypes.h>
#define NOTE_B0 31
#define NOTE_C1 33
#define NOTE_CS1 35
#define NOTE_D1 37
#define NOTE_DS1 39
#define NOTE_E1 41
#define NOTE_F1 44
#define NOTE_FS1 46
#define NOTE_G1 49
#define NOTE_GS1 52
#define NOTE_A1 55
#define NOTE_AS1 58
#define NOTE_B1 62
#define NOTE_C2 65
#define NOTE_CS2 69
#define NOTE_D2 73
#define NOTE_DS2 78
#define NOTE_E2 82
#define NOTE_F2 87
#define NOTE_FS2 93
#define NOTE_G2 98
#define NOTE_GS2 104
#define NOTE_A2 110
#define NOTE_AS2 117
#define NOTE_B2 123
#define NOTE_C3 131
#define NOTE_CS3 139
#define NOTE_D3 147
#define NOTE_DS3 156
#define NOTE_E3 165
#define NOTE_F3 175
#define NOTE_FS3 185
#define NOTE_G3 196
#define NOTE_GS3 208
#define NOTE_A3 220
#define NOTE_AS3 233
#define NOTE_B3 247
#define NOTE_C4 262
#define NOTE_CS4 277
#define NOTE_D4 294
#define NOTE_DS4 311
#define NOTE_E4 330
#define NOTE_F4 349
#define NOTE_FS4 370
#define NOTE_G4 392
#define NOTE_GS4 415
#define NOTE_A4 440
#define NOTE_AS4 466
#define NOTE_B4 494
#define NOTE_C5 523
#define NOTE_CS5 554
#define NOTE_D5 587
#define NOTE_DS5 622
#define NOTE_E5 659
#define NOTE_F5 698
#define NOTE_FS5 740
#define NOTE_G5 784
#define NOTE_GS5 831
#define NOTE_A5 880
#define NOTE_AS5 932
#define NOTE_B5 988
#define NOTE_C6 1047
#define NOTE_CS6 1109
#define NOTE_D6 1175
#define NOTE_DS6 1245
#define NOTE_E6 1319
#define NOTE_F6 1397
#define NOTE_FS6 1480
#define NOTE_G6 1568
#define NOTE_GS6 1661
#define NOTE_A6 1760
#define NOTE_AS6 1865
#define NOTE_B6 1976
#define NOTE_C7 2093
#define NOTE_CS7 2217
#define NOTE_D7 2349
#define NOTE_DS7 2489
#define NOTE_E7 2637
#define NOTE_F7 2794
#define NOTE_FS7 2960
#define NOTE_G7 3136
#define NOTE_GS7 3322
#define NOTE_A7 3520
#define NOTE_AS7 3729
#define NOTE_B7 3951
#define NOTE_C8 4186
#define NOTE_CS8 4435
#define NOTE_D8 4699
#define NOTE_DS8 4978
static const uint16_t sNotePitches[] = {
NOTE_B0, NOTE_C1, NOTE_CS1, NOTE_D1, NOTE_DS1, NOTE_E1, NOTE_F1, NOTE_FS1,
NOTE_G1, NOTE_GS1, NOTE_A1, NOTE_AS1, NOTE_B1, NOTE_C2, NOTE_CS2, NOTE_D2,
NOTE_DS2, NOTE_E2, NOTE_F2, NOTE_FS2, NOTE_G2, NOTE_GS2, NOTE_A2, NOTE_AS2,
NOTE_B2, NOTE_C3, NOTE_CS3, NOTE_D3, NOTE_DS3, NOTE_E3, NOTE_F3, NOTE_FS3,
NOTE_G3, NOTE_GS3, NOTE_A3, NOTE_AS3, NOTE_B3, NOTE_C4, NOTE_CS4, NOTE_D4,
NOTE_DS4, NOTE_E4, NOTE_F4, NOTE_FS4, NOTE_G4, NOTE_GS4, NOTE_A4, NOTE_AS4,
NOTE_B4, NOTE_C5, NOTE_CS5, NOTE_D5, NOTE_DS5, NOTE_E5, NOTE_F5, NOTE_FS5,
NOTE_G5, NOTE_GS5, NOTE_A5, NOTE_AS5, NOTE_B5, NOTE_C6, NOTE_CS6, NOTE_D6,
NOTE_DS6, NOTE_E6, NOTE_F6, NOTE_FS6, NOTE_G6, NOTE_GS6, NOTE_A6, NOTE_AS6,
NOTE_B6, NOTE_C7, NOTE_CS7, NOTE_D7, NOTE_DS7, NOTE_E7, NOTE_F7, NOTE_FS7,
NOTE_G7, NOTE_GS7, NOTE_A7, NOTE_AS7, NOTE_B7, NOTE_C8, NOTE_CS8, NOTE_D8, NOTE_DS8,
};