mirror of https://github.com/probonopd/MiniDexed
* CMIDIDevice is the generic MIDI handler * CMIDIKeyboard handles USB audio class MIDI devices * CSerialMIDIDevice handles the serial MIDI device * Now all MIDI inputs can work simultaneous * Program change and bank select work with serial MIDIpull/37/head
Rene Stange
3 years ago
parent
ae0a2262c4
commit
b0b62a7640
@ -0,0 +1,143 @@ |
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//
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// mididevice.cpp
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Original author of this class:
|
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// R. Stange <rsta2@o2online.de>
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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 "mididevice.h" |
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#include "minidexed.h" |
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#include "config.h" |
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#include <stdio.h> |
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#include <assert.h> |
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#define MIDI_NOTE_OFF 0b1000 |
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#define MIDI_NOTE_ON 0b1001 |
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#define MIDI_AFTERTOUCH 0b1010 // TODO
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#define MIDI_CONTROL_CHANGE 0b1011 |
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#define MIDI_CC_BANK_SELECT_MSB 0 // TODO
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#define MIDI_CC_BANK_SELECT_LSB 32 |
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#define MIDI_PROGRAM_CHANGE 0b1100 |
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#define MIDI_PITCH_BEND 0b1110 |
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CMIDIDevice::CMIDIDevice (CMiniDexed *pSynthesizer, CConfig *pConfig) |
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: m_pSynthesizer (pSynthesizer), |
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m_pConfig (pConfig) |
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{ |
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} |
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CMIDIDevice::~CMIDIDevice (void) |
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{ |
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m_pSynthesizer = 0; |
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} |
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void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsigned nCable) |
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{ |
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assert (m_pSynthesizer != 0); |
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// The packet contents are just normal MIDI data - see
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// https://www.midi.org/specifications/item/table-1-summary-of-midi-message
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if (m_pConfig->GetMIDIDumpEnabled ()) |
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{ |
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switch (nLength) |
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{ |
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case 1: |
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printf ("MIDI %u: %02X\n", nCable, (unsigned) pMessage[0]); |
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break; |
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case 2: |
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printf ("MIDI %u: %02X %02X\n", nCable, |
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(unsigned) pMessage[0], (unsigned) pMessage[1]); |
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break; |
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case 3: |
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printf ("MIDI %u: %02X %02X %02X\n", nCable, |
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(unsigned) pMessage[0], (unsigned) pMessage[1], |
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(unsigned) pMessage[2]); |
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break; |
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} |
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} |
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if (nLength < 2) |
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{ |
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return; |
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} |
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u8 ucStatus = pMessage[0]; |
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// TODO: u8 ucChannel = ucStatus & 0x0F;
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u8 ucType = ucStatus >> 4; |
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u8 ucKeyNumber = pMessage[1]; |
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u8 ucVelocity = pMessage[2]; |
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switch (ucType) |
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{ |
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case MIDI_NOTE_ON: |
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if (nLength < 3) |
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{ |
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break; |
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} |
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if (ucVelocity > 0) |
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{ |
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if (ucVelocity <= 127) |
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{ |
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m_pSynthesizer->keydown (ucKeyNumber, ucVelocity); |
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} |
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} |
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else |
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{ |
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m_pSynthesizer->keyup (ucKeyNumber); |
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} |
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break; |
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case MIDI_NOTE_OFF: |
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if (nLength < 3) |
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{ |
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break; |
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} |
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m_pSynthesizer->keyup (ucKeyNumber); |
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break; |
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case MIDI_CONTROL_CHANGE: |
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if (nLength < 3) |
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{ |
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break; |
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} |
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switch (pMessage[1]) |
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{ |
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case MIDI_CC_BANK_SELECT_LSB: |
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m_pSynthesizer->BankSelectLSB (pMessage[2]); |
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break; |
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} |
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break; |
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case MIDI_PROGRAM_CHANGE: |
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m_pSynthesizer->ProgramChange (pMessage[1]); |
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break; |
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case MIDI_PITCH_BEND: |
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m_pSynthesizer->setPitchbend (pMessage[1]); |
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break; |
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default: |
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break; |
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} |
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} |
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@ -0,0 +1,45 @@ |
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//
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// mididevice.h
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Original author of this class:
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// R. Stange <rsta2@o2online.de>
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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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#ifndef _mididevice_h |
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#define _mididevice_h |
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#include "config.h" |
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#include <circle/types.h> |
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class CMiniDexed; |
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class CMIDIDevice |
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{ |
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public: |
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CMIDIDevice (CMiniDexed *pSynthesizer, CConfig *pConfig); |
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~CMIDIDevice (void); |
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protected: |
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void MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsigned nCable = 0); |
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private: |
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CMiniDexed *m_pSynthesizer; |
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CConfig *m_pConfig; |
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}; |
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#endif |
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@ -0,0 +1,71 @@ |
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//
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// midikeyboard.cpp
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Original author of this class:
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// R. Stange <rsta2@o2online.de>
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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 "midikeyboard.h" |
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#include <circle/devicenameservice.h> |
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#include <assert.h> |
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CMIDIKeyboard *CMIDIKeyboard::s_pThis = 0; |
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CMIDIKeyboard::CMIDIKeyboard (CMiniDexed *pSynthesizer, CConfig *pConfig) |
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: CMIDIDevice (pSynthesizer, pConfig), |
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m_pMIDIDevice (0) |
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{ |
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s_pThis = this; |
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} |
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CMIDIKeyboard::~CMIDIKeyboard (void) |
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{ |
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s_pThis = 0; |
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} |
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void CMIDIKeyboard::Process (boolean bPlugAndPlayUpdated) |
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{ |
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if (!bPlugAndPlayUpdated) |
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{ |
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return; |
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} |
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if (m_pMIDIDevice == 0) |
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{ |
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m_pMIDIDevice = |
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(CUSBMIDIDevice *) CDeviceNameService::Get ()->GetDevice ("umidi1", FALSE); |
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if (m_pMIDIDevice != 0) |
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{ |
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m_pMIDIDevice->RegisterPacketHandler (MIDIPacketHandler); |
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m_pMIDIDevice->RegisterRemovedHandler (DeviceRemovedHandler); |
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} |
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} |
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} |
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void CMIDIKeyboard::MIDIPacketHandler (unsigned nCable, u8 *pPacket, unsigned nLength) |
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{ |
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assert (s_pThis != 0); |
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s_pThis->MIDIMessageHandler (pPacket, nLength, nCable); |
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} |
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void CMIDIKeyboard::DeviceRemovedHandler (CDevice *pDevice, void *pContext) |
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{ |
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assert (s_pThis != 0); |
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s_pThis->m_pMIDIDevice = 0; |
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} |
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@ -0,0 +1,53 @@ |
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//
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// midikeyboard.h
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Original author of this class:
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// R. Stange <rsta2@o2online.de>
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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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#ifndef _midikeyboard_h |
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#define _midikeyboard_h |
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#include "mididevice.h" |
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#include "config.h" |
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#include <circle/usb/usbmidi.h> |
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#include <circle/device.h> |
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#include <circle/types.h> |
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class CMiniDexed; |
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class CMIDIKeyboard : public CMIDIDevice |
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{ |
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public: |
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CMIDIKeyboard (CMiniDexed *pSynthesizer, CConfig *pConfig); |
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~CMIDIKeyboard (void); |
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void Process (boolean bPlugAndPlayUpdated); |
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private: |
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static void MIDIPacketHandler (unsigned nCable, u8 *pPacket, unsigned nLength); |
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static void DeviceRemovedHandler (CDevice *pDevice, void *pContext); |
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private: |
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CUSBMIDIDevice * volatile m_pMIDIDevice; |
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static CMIDIKeyboard *s_pThis; |
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}; |
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#endif |
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@ -0,0 +1,98 @@ |
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//
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// serialmididevice.cpp
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// Original author of this class:
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// R. Stange <rsta2@o2online.de>
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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 "serialmididevice.h" |
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#include <assert.h> |
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CSerialMIDIDevice::CSerialMIDIDevice (CMiniDexed *pSynthesizer, CInterruptSystem *pInterrupt, |
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CConfig *pConfig) |
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: CMIDIDevice (pSynthesizer, pConfig), |
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m_pConfig (pConfig), |
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m_Serial (pInterrupt, TRUE), |
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m_nSerialState (0) |
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{ |
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} |
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CSerialMIDIDevice::~CSerialMIDIDevice (void) |
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{ |
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m_nSerialState = 255; |
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} |
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boolean CSerialMIDIDevice::Initialize (void) |
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{ |
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assert (m_pConfig); |
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return m_Serial.Initialize (m_pConfig->GetMIDIBaudRate ()); |
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} |
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void CSerialMIDIDevice::Process (void) |
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{ |
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// Read serial MIDI data
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u8 Buffer[100]; |
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int nResult = m_Serial.Read (Buffer, sizeof Buffer); |
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if (nResult <= 0) |
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{ |
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return; |
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} |
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// Process MIDI messages
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// See: https://www.midi.org/specifications/item/table-1-summary-of-midi-message
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for (int i = 0; i < nResult; i++) |
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{ |
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u8 uchData = Buffer[i]; |
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switch (m_nSerialState) |
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{ |
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case 0: |
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MIDIRestart: |
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if ( (uchData & 0x80) == 0x80 // status byte, all channels
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&& (uchData & 0xF0) != 0xF0) // ignore system messages
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{ |
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m_SerialMessage[m_nSerialState++] = uchData; |
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} |
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break; |
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case 1: |
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case 2: |
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if (uchData & 0x80) // got status when parameter expected
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{ |
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m_nSerialState = 0; |
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goto MIDIRestart; |
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} |
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m_SerialMessage[m_nSerialState++] = uchData; |
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if ( (m_SerialMessage[0] & 0xE0) == 0xC0 |
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|| m_nSerialState == 3) // message is complete
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{ |
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MIDIMessageHandler (m_SerialMessage, m_nSerialState); |
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m_nSerialState = 0; |
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} |
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break; |
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default: |
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assert (0); |
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break; |
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} |
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} |
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} |
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@ -0,0 +1,52 @@ |
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//
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// serialmididevice.h
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
|
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// Original author of this class:
|
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// R. Stange <rsta2@o2online.de>
|
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//
|
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// 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/>.
|
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//
|
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#ifndef _serialmididevice_h |
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#define _serialmididevice_h |
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|
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#include "mididevice.h" |
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#include "config.h" |
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#include <circle/interrupt.h> |
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#include <circle/serial.h> |
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#include <circle/types.h> |
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class CMiniDexed; |
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class CSerialMIDIDevice : public CMIDIDevice |
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{ |
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public: |
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CSerialMIDIDevice (CMiniDexed *pSynthesizer, CInterruptSystem *pInterrupt, CConfig *pConfig); |
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~CSerialMIDIDevice (void); |
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boolean Initialize (void); |
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void Process (void); |
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private: |
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CConfig *m_pConfig; |
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CSerialDevice m_Serial; |
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unsigned m_nSerialState; |
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u8 m_SerialMessage[3]; |
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}; |
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#endif |
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Loading…
Reference in new issue