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MiniDexed/src/mididevice.cpp

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//
// mididevice.cpp
//
// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
// Copyright (C) 2022 The MiniDexed Team
//
// Original author of this class:
// R. Stange <rsta2@o2online.de>
//
// 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 <circle/logger.h>
#include "mididevice.h"
#include "minidexed.h"
#include "config.h"
#include <stdio.h>
#include <assert.h>
#include "userinterface.h"
LOGMODULE ("mididevice");
#define MIDI_NOTE_OFF 0b1000
#define MIDI_NOTE_ON 0b1001
#define MIDI_AFTERTOUCH 0b1010 // TODO
#define MIDI_CHANNEL_AFTERTOUCH 0b1101 // right now Synth_Dexed just manage Channel Aftertouch not Polyphonic AT -> 0b1010
#define MIDI_CONTROL_CHANGE 0b1011
#define MIDI_CC_BANK_SELECT_MSB 0
#define MIDI_CC_MODULATION 1
#define MIDI_CC_BREATH_CONTROLLER 2
#define MIDI_CC_FOOT_PEDAL 4
#define MIDI_CC_VOLUME 7
#define MIDI_CC_PAN_POSITION 10
#define MIDI_CC_BANK_SELECT_LSB 32
#define MIDI_CC_BANK_SUSTAIN 64
#define MIDI_CC_RESONANCE 71
#define MIDI_CC_FREQUENCY_CUTOFF 74
#define MIDI_CC_REVERB_LEVEL 91
#define MIDI_CC_DETUNE_LEVEL 94
#define MIDI_CC_ALL_SOUND_OFF 120
#define MIDI_CC_ALL_NOTES_OFF 123
#define MIDI_PROGRAM_CHANGE 0b1100
#define MIDI_PITCH_BEND 0b1110
#define MIDI_SYSTEM_EXCLUSIVE_BEGIN 0xF0
#define MIDI_SYSTEM_EXCLUSIVE_END 0xF7
#define MIDI_TIMING_CLOCK 0xF8
#define MIDI_ACTIVE_SENSING 0xFE
CMIDIDevice::TDeviceMap CMIDIDevice::s_DeviceMap;
CMIDIDevice::CMIDIDevice (CMiniDexed *pSynthesizer, CConfig *pConfig, CUserInterface *pUI)
: m_pSynthesizer (pSynthesizer),
m_pConfig (pConfig),
m_pUI (pUI)
{
for (unsigned nTG = 0; nTG < CConfig::ToneGenerators; nTG++)
{
m_ChannelMap[nTG] = Disabled;
}
}
CMIDIDevice::~CMIDIDevice (void)
{
m_pSynthesizer = 0;
}
void CMIDIDevice::SetChannel (u8 ucChannel, unsigned nTG)
{
assert (nTG < CConfig::ToneGenerators);
m_ChannelMap[nTG] = ucChannel;
}
u8 CMIDIDevice::GetChannel (unsigned nTG) const
{
assert (nTG < CConfig::ToneGenerators);
return m_ChannelMap[nTG];
}
void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsigned nCable)
{
// The packet contents are just normal MIDI data - see
// https://www.midi.org/specifications/item/table-1-summary-of-midi-message
if (m_pConfig->GetMIDIDumpEnabled ())
{
switch (nLength)
{
case 1:
if ( pMessage[0] != MIDI_TIMING_CLOCK
&& pMessage[0] != MIDI_ACTIVE_SENSING)
{
printf ("MIDI%u: %02X\n", nCable, (unsigned) pMessage[0]);
}
break;
case 2:
printf ("MIDI%u: %02X %02X\n", nCable,
(unsigned) pMessage[0], (unsigned) pMessage[1]);
break;
case 3:
printf ("MIDI%u: %02X %02X %02X\n", nCable,
(unsigned) pMessage[0], (unsigned) pMessage[1],
(unsigned) pMessage[2]);
break;
default:
switch(pMessage[0])
{
case MIDI_SYSTEM_EXCLUSIVE_BEGIN:
printf("MIDI%u: SysEx data length: [%d]:",nCable, uint16_t(nLength));
for (uint16_t i = 0; i < nLength; i++)
{
if((i % 16) == 0)
printf("\n%04d:",i);
printf(" 0x%02x",pMessage[i]);
}
printf("\n");
break;
default:
printf("MIDI%u: Unhandled MIDI event type %0x02x\n",nCable,pMessage[0]);
}
break;
}
}
// Only for debugging:
/*
if(pMessage[0]==MIDI_SYSTEM_EXCLUSIVE_BEGIN)
{
printf("MIDI%u: SysEx data length: [%d]:",nCable, uint16_t(nLength));
for (uint16_t i = 0; i < nLength; i++)
{
if((i % 16) == 0)
printf("\n%04d:",i);
printf(" 0x%02x",pMessage[i]);
}
printf("\n");
}
*/
// Handle MIDI Thru
if (m_DeviceName.compare (m_pConfig->GetMIDIThruIn ()) == 0)
{
TDeviceMap::const_iterator Iterator;
Iterator = s_DeviceMap.find (m_pConfig->GetMIDIThruOut ());
if (Iterator != s_DeviceMap.end ())
{
Iterator->second->Send (pMessage, nLength, nCable);
}
}
if (nLength < 2)
{
// LOGERR("MIDI message is shorter than 2 bytes!");
return;
}
m_MIDISpinLock.Acquire ();
u8 ucStatus = pMessage[0];
u8 ucChannel = ucStatus & 0x0F;
u8 ucType = ucStatus >> 4;
// GLOBAL MIDI SYSEX
if (pMessage[0] == MIDI_SYSTEM_EXCLUSIVE_BEGIN && pMessage[3] == 0x04 && pMessage[4] == 0x01 && pMessage[nLength-1] == MIDI_SYSTEM_EXCLUSIVE_END) // MASTER VOLUME
{
float32_t nMasterVolume=((pMessage[5] & 0x7c) & ((pMessage[6] & 0x7c) <<7))/(1<<14);
LOGNOTE("Master volume: %f",nMasterVolume);
m_pSynthesizer->setMasterVolume(nMasterVolume);
}
else
{
// Perform any MiniDexed level MIDI handling before specific Tone Generators
switch (ucType)
{
case MIDI_CONTROL_CHANGE:
case MIDI_NOTE_OFF:
case MIDI_NOTE_ON:
if (nLength < 3)
{
break;
}
m_pUI->UIMIDICmdHandler (ucChannel, ucStatus & 0xF0, pMessage[1], pMessage[2]);
break;
}
// Process MIDI for each Tone Generator
for (unsigned nTG = 0; nTG < CConfig::ToneGenerators; nTG++)
{
if (ucStatus == MIDI_SYSTEM_EXCLUSIVE_BEGIN)
{
// MIDI SYSEX per MIDI channel
uint8_t ucSysExChannel = (pMessage[2] & 0x0F);
if (m_ChannelMap[nTG] == ucSysExChannel || m_ChannelMap[nTG] == OmniMode)
{
LOGNOTE("MIDI-SYSEX: channel: %u, len: %u, TG: %u",m_ChannelMap[nTG],nLength,nTG);
HandleSystemExclusive(pMessage, nLength, nCable, nTG);
}
}
else
{
if ( m_ChannelMap[nTG] == ucChannel
|| m_ChannelMap[nTG] == OmniMode)
{
switch (ucType)
{
case MIDI_NOTE_ON:
if (nLength < 3)
{
break;
}
if (pMessage[2] > 0)
{
if (pMessage[2] <= 127)
{
m_pSynthesizer->keydown (pMessage[1],
pMessage[2], nTG);
}
}
else
{
m_pSynthesizer->keyup (pMessage[1], nTG);
}
break;
case MIDI_NOTE_OFF:
if (nLength < 3)
{
break;
}
m_pSynthesizer->keyup (pMessage[1], nTG);
break;
case MIDI_CHANNEL_AFTERTOUCH:
m_pSynthesizer->setAftertouch (pMessage[1], nTG);
m_pSynthesizer->ControllersRefresh (nTG);
break;
case MIDI_CONTROL_CHANGE:
if (nLength < 3)
{
break;
}
switch (pMessage[1])
{
case MIDI_CC_MODULATION:
m_pSynthesizer->setModWheel (pMessage[2], nTG);
m_pSynthesizer->ControllersRefresh (nTG);
break;
case MIDI_CC_FOOT_PEDAL:
m_pSynthesizer->setFootController (pMessage[2], nTG);
m_pSynthesizer->ControllersRefresh (nTG);
break;
case MIDI_CC_BREATH_CONTROLLER:
m_pSynthesizer->setBreathController (pMessage[2], nTG);
m_pSynthesizer->ControllersRefresh (nTG);
break;
case MIDI_CC_VOLUME:
m_pSynthesizer->SetVolume (pMessage[2], nTG);
break;
case MIDI_CC_PAN_POSITION:
m_pSynthesizer->SetPan (pMessage[2], nTG);
break;
case MIDI_CC_BANK_SELECT_MSB:
m_pSynthesizer->BankSelectMSB (pMessage[2], nTG);
break;
case MIDI_CC_BANK_SELECT_LSB:
m_pSynthesizer->BankSelectLSB (pMessage[2], nTG);
break;
case MIDI_CC_BANK_SUSTAIN:
m_pSynthesizer->setSustain (pMessage[2] >= 64, nTG);
break;
case MIDI_CC_RESONANCE:
m_pSynthesizer->SetResonance (maplong (pMessage[2], 0, 127, 0, 99), nTG);
break;
case MIDI_CC_FREQUENCY_CUTOFF:
m_pSynthesizer->SetCutoff (maplong (pMessage[2], 0, 127, 0, 99), nTG);
break;
case MIDI_CC_REVERB_LEVEL:
m_pSynthesizer->SetReverbSend (maplong (pMessage[2], 0, 127, 0, 99), nTG);
break;
case MIDI_CC_DETUNE_LEVEL:
if (pMessage[2] == 0)
{
// "0 to 127, with 0 being no celeste (detune) effect applied at all."
m_pSynthesizer->SetMasterTune (0, nTG);
}
else
{
m_pSynthesizer->SetMasterTune (maplong (pMessage[2], 1, 127, -99, 99), nTG);
}
break;
case MIDI_CC_ALL_SOUND_OFF:
m_pSynthesizer->panic (pMessage[2], nTG);
break;
case MIDI_CC_ALL_NOTES_OFF:
// As per "MIDI 1.0 Detailed Specification" v4.2
// From "ALL NOTES OFF" states:
// "Receivers should ignore an All Notes Off message while Omni is on (Modes 1 & 2)"
if (!m_pConfig->GetIgnoreAllNotesOff () && m_ChannelMap[nTG] != OmniMode)
{
m_pSynthesizer->notesOff (pMessage[2], nTG);
}
break;
}
break;
case MIDI_PROGRAM_CHANGE:
// do program change only if enabled in config
if( m_pConfig->GetMIDIRXProgramChange() )
m_pSynthesizer->ProgramChange (pMessage[1], nTG);
break;
case MIDI_PITCH_BEND: {
if (nLength < 3)
{
break;
}
s16 nValue = pMessage[1];
nValue |= (s16) pMessage[2] << 7;
nValue -= 0x2000;
m_pSynthesizer->setPitchbend (nValue, nTG);
} break;
default:
break;
}
}
}
}
}
m_MIDISpinLock.Release ();
}
void CMIDIDevice::AddDevice (const char *pDeviceName)
{
assert (pDeviceName);
assert (m_DeviceName.empty ());
m_DeviceName = pDeviceName;
assert (!m_DeviceName.empty ());
s_DeviceMap.insert (std::pair<std::string, CMIDIDevice *> (pDeviceName, this));
}
void CMIDIDevice::HandleSystemExclusive(const uint8_t* pMessage, const size_t nLength, const unsigned nCable, const uint8_t nTG)
{
int16_t sysex_return;
sysex_return = m_pSynthesizer->checkSystemExclusive(pMessage, nLength, nTG);
LOGDBG("SYSEX handler return value: %d", sysex_return);
switch (sysex_return)
{
case -1:
LOGERR("SysEx end status byte not detected.");
break;
case -2:
LOGERR("SysEx vendor not Yamaha.");
break;
case -3:
LOGERR("Unknown SysEx parameter change.");
break;
case -4:
LOGERR("Unknown SysEx voice or function.");
break;
case -5:
LOGERR("Not a SysEx voice bulk upload.");
break;
case -6:
LOGERR("Wrong length for SysEx voice bulk upload (not 155).");
break;
case -7:
LOGERR("Checksum error for one voice.");
break;
case -8:
LOGERR("Not a SysEx bank bulk upload.");
break;
case -9:
LOGERR("Wrong length for SysEx bank bulk upload (not 4096).");
case -10:
LOGERR("Checksum error for bank.");
break;
case -11:
LOGERR("Unknown SysEx message.");
break;
case 64:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setMonoMode(pMessage[5],nTG);
break;
case 65:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setPitchbendRange(pMessage[5],nTG);
break;
case 66:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setPitchbendStep(pMessage[5],nTG);
break;
case 67:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setPortamentoMode(pMessage[5],nTG);
break;
case 68:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setPortamentoGlissando(pMessage[5],nTG);
break;
case 69:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setPortamentoTime(pMessage[5],nTG);
break;
case 70:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setModWheelRange(pMessage[5],nTG);
break;
case 71:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setModWheelTarget(pMessage[5],nTG);
break;
case 72:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setFootControllerRange(pMessage[5],nTG);
break;
case 73:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setFootControllerTarget(pMessage[5],nTG);
break;
case 74:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setBreathControllerRange(pMessage[5],nTG);
break;
case 75:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setBreathControllerTarget(pMessage[5],nTG);
break;
case 76:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setAftertouchRange(pMessage[5],nTG);
break;
case 77:
LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
m_pSynthesizer->setAftertouchTarget(pMessage[5],nTG);
break;
case 100:
// load sysex-data into voice memory
LOGDBG("One Voice bulk upload");
m_pSynthesizer->loadVoiceParameters(pMessage,nTG);
break;
case 200:
LOGDBG("Bank bulk upload.");
//TODO: add code for storing a bank bulk upload
LOGNOTE("Currently code for storing a bulk bank upload is missing!");
break;
default:
if(sysex_return >= 300 && sysex_return < 500)
{
LOGDBG("SysEx voice parameter change: Parameter %d value: %d",pMessage[4] + ((pMessage[3] & 0x03) * 128), pMessage[5]);
m_pSynthesizer->setVoiceDataElement(pMessage[4] + ((pMessage[3] & 0x03) * 128), pMessage[5],nTG);
switch(pMessage[4] + ((pMessage[3] & 0x03) * 128))
{
case 134:
m_pSynthesizer->notesOff(0,nTG);
break;
}
}
else if(sysex_return >= 500 && sysex_return < 600)
{
LOGDBG("SysEx send voice %u request",sysex_return-500);
SendSystemExclusiveVoice(sysex_return-500, nCable, nTG);
}
break;
}
}
void CMIDIDevice::SendSystemExclusiveVoice(uint8_t nVoice, const unsigned nCable, uint8_t nTG)
{
uint8_t voicedump[163];
// Get voice sysex dump from TG
m_pSynthesizer->getSysExVoiceDump(voicedump, nTG);
TDeviceMap::const_iterator Iterator;
// send voice dump to all MIDI interfaces
for(Iterator = s_DeviceMap.begin(); Iterator != s_DeviceMap.end(); ++Iterator)
{
Iterator->second->Send (voicedump, sizeof(voicedump)*sizeof(uint8_t));
// LOGDBG("Send SYSEX voice dump %u to \"%s\"",nVoice,Iterator->first.c_str());
}
}