CoreMidiDriver.cpp

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2025 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * CoreMidi driver for Hydrogen
 * Copyright(c) 2005-2006 by Jonathan Dempsey
 *
 * 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 2 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 https://www.gnu.org/licenses
 *
 * Code cleanup (20060222 Jonathan Dempsey)
 * More cleaning (20060511 Jonathan Dempsey)
 * ... and a little bit more cleaning . . . (20060512 Jonathan Dempsey)
 * Added CFRelease code (20060514 Jonathan Dempsey)
 */
 
#include <core/Hydrogen.h>
#include <core/Basics/Note.h>
#include <core/Basics/Instrument.h>
#include <core/Basics/InstrumentList.h>
#include <core/Preferences/Preferences.h>
#include <core/IO/CoreMidiDriver.h>
 
#if defined(H2CORE_HAVE_COREMIDI) || _DOXYGEN_
 
namespace H2Core
{
 
 
static void midiProc ( const MIDIPacketList * pktlist,
                                           void * readProcRefCon,
                                           void * srcConnRefCon )
{
        UNUSED( srcConnRefCon );
 
        MIDIPacket* packet = ( MIDIPacket * )pktlist->packet;
 
        CoreMidiDriver *instance = ( CoreMidiDriver * )readProcRefCon;
        for ( uint i = 0; i < pktlist->numPackets; i++ ) {
                MidiMessage msg;
                int nEventType = packet->data[0];
                msg.setType( nEventType );
                
                if ( nEventType == 240 ) {
                        // SysEx messages also contain arbitrary data which has to
                        // be copied manually.
                        for ( int i = 0; i < packet->length; i++ ) {
                                msg.m_sysexData.push_back( packet->data[ i ] );
                        }
                }
                else {
                        msg.m_nData1 = packet->data[1];
                        msg.m_nData2 = packet->data[2];
                }
 
                instance->handleMidiMessage( msg );
                packet = MIDIPacketNext( packet );
        }
}
 
 
CoreMidiDriver::CoreMidiDriver()
                : MidiInput() ,MidiOutput(), Object<CoreMidiDriver>()
                , m_bRunning( false )
{
        
        OSStatus err = noErr;
        err = MIDIClientCreate ( CFSTR( "h2MIDIClient" ), NULL, NULL, &h2MIDIClient );
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot create CoreMIDI client: %1" ).arg( err ));
        }
 
        err = MIDIInputPortCreate ( h2MIDIClient, CFSTR( "h2InputPort" ), midiProc, this, &h2InputRef );
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot create CoreMIDI input port: %1" ).arg( err ));
        }
 
        err = MIDIOutputPortCreate ( h2MIDIClient, CFSTR( "h2OutputPort" ), &h2OutputRef );
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot create CoreMIDI output port: %1" ).arg( err ));
        }
 
        err = MIDISourceCreate ( h2MIDIClient, CFSTR( "Hydrogen" ), &h2VirtualOut );
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot create CoreMIDI virtual output: %1" ).arg( err ));
        }
}
 
 
 
CoreMidiDriver::~CoreMidiDriver()
{
        /*if ( isMidiDriverRunning ) {
                close();
        } */
        close();
        INFOLOG( "DESTROY" );
}
 
 
 
void CoreMidiDriver::open()
{
        INFOLOG( "open" );
 
        OSStatus err = noErr;
 
        QString sMidiPortName = Preferences::get_instance()->m_sMidiPortName;
 
        cmSources = MIDIGetNumberOfSources();
        unsigned i;
        for ( i = 0; i < cmSources; i++ ) {
                CFStringRef H2MidiNames;
                cmH2Src = MIDIGetSource( i );
 
                if ( cmH2Src ) {
                        err = MIDIObjectGetStringProperty( cmH2Src, kMIDIPropertyName, &H2MidiNames );
                        char cmName[64];
                        err = CFStringGetCString( H2MidiNames, cmName, 64, kCFStringEncodingASCII );
                        QString h2MidiPortName = cmName;
                        if ( h2MidiPortName == sMidiPortName &&
                                 sMidiPortName != Preferences::getNullMidiPort() ) {
                                MIDIPortConnectSource ( h2InputRef, cmH2Src, NULL );
                                m_bRunning = true;
                        }
                }
                CFRelease ( H2MidiNames );
        }
 
        int n = MIDIGetNumberOfDestinations();
        if (n > 0) {
                cmH2Dst = MIDIGetDestination(0);
        }
 
        if (cmH2Dst != 0) {
                CFStringRef H2MidiNames;
 
                MIDIObjectGetStringProperty(cmH2Dst, kMIDIPropertyName, &H2MidiNames);
                //CFStringGetCString(pname, name, sizeof(name), 0);
                //MIDIPortConnectSource ( h2OutputRef, cmH2Dst, NULL );
                MIDIPortConnectSource ( h2OutputRef, cmH2Dst, NULL );
                if( H2MidiNames != NULL){
                        CFRelease( H2MidiNames );
                }
        }
}
 
 
 
void CoreMidiDriver::close()
{
        OSStatus err = noErr;
        err = MIDIPortDisconnectSource( h2InputRef, cmH2Src );
        err = MIDIPortDispose( h2InputRef );
        err = MIDIEndpointDispose( h2VirtualOut );
        //err = MIDIPortDisconnectSource( h2OutputRef, cmH2Dst );
        //err = MIDIPortDispose( h2OutputRef );
        err = MIDIClientDispose( h2MIDIClient );
}
 
std::vector<QString> CoreMidiDriver::getInputPortList()
{
        INFOLOG( "retrieving output list" );
        OSStatus err = noErr;
 
        std::vector<QString> cmPortList;
        
        cmSources = MIDIGetNumberOfDestinations();
 
        INFOLOG ( "Getting number of MIDI sources . . .\n" );
 
        unsigned i;
        for ( i = 0; i < cmSources; i++ ) {
                CFStringRef H2MidiNames;
                cmH2Src = MIDIGetDestination( i );
                if ( cmH2Src == 0 ) {
                        ERRORLOG( "Could not open output device" );
                }
                if ( cmH2Src ) {
                        err = MIDIObjectGetStringProperty( cmH2Src, kMIDIPropertyName, &H2MidiNames );
                        INFOLOG ( "Getting MIDI object string property . . .\n" );
                        char cmName[ 64 ];
                        CFStringGetCString( H2MidiNames, cmName, 64, kCFStringEncodingASCII );
                        INFOLOG ( "Getting MIDI object name . . .\n" );
                        QString h2MidiPortName = cmName;
                        cmPortList.push_back( h2MidiPortName );
                }
                CFRelease( H2MidiNames );
        }
 
        return cmPortList;
}
 
std::vector<QString> CoreMidiDriver::getOutputPortList()
{
        INFOLOG( "retrieving output list" );
        OSStatus err = noErr;
 
        std::vector<QString> cmPortList;
        cmSources = MIDIGetNumberOfSources();
 
        INFOLOG ( "Getting number of MIDI sources . . .\n" );
 
        unsigned i;
        for ( i = 0; i < cmSources; i++ ) {
                CFStringRef H2MidiNames;
                cmH2Src = MIDIGetSource( i );
                if ( cmH2Src == 0 ) {
                        ERRORLOG( "Could not open input device" );
                }
                if ( cmH2Src ) {
                        err = MIDIObjectGetStringProperty( cmH2Src, kMIDIPropertyName, &H2MidiNames );
                        INFOLOG ( "Getting MIDI object string property . . .\n" );
                        char cmName[ 64 ];
                        CFStringGetCString( H2MidiNames, cmName, 64, kCFStringEncodingASCII );
                        INFOLOG ( "Getting MIDI object name . . .\n" );
                        QString h2MidiPortName = cmName;
                        cmPortList.push_back( h2MidiPortName );
                }
                CFRelease( H2MidiNames );
        }
 
        return cmPortList;
}
 
void CoreMidiDriver::handleQueueNote(Note* pNote)
{
        if (cmH2Dst == 0 ) {
                ERRORLOG( "cmH2Dst = 0 " );
                return;
        }
 
        int channel = pNote->get_instrument()->get_midi_out_channel();
        if (channel < 0) {
                return;
        }
 
        int key = pNote->get_midi_key();
        int velocity = pNote->get_midi_velocity();
 
        MIDIPacketList packetList;
        packetList.numPackets = 1;
 
        packetList.packet->timeStamp = 0;
        packetList.packet->length = 3;
        packetList.packet->data[0] = 0x80 | channel;
        packetList.packet->data[1] = key;
        packetList.packet->data[2] = velocity;
 
        sendMidiPacket ( &packetList );
 
        packetList.packet->data[0] = 0x90 | channel;
        packetList.packet->data[1] = key;
        packetList.packet->data[2] = velocity;
 
        sendMidiPacket ( &packetList );
}
 
void CoreMidiDriver::handleQueueNoteOff( int channel, int key, int velocity )
{
        if (cmH2Dst == 0 ) {
                ERRORLOG( "cmH2Dst = 0 " );
                return;
        }
 
//      int channel = pNote->get_instrument()->get_midi_out_channel();
        if (channel < 0) {
                return;
        }
 
//      int key = pNote->get_instrument()->get_midi_out_note();
//      int velocity = pNote->get_velocity() * 127;
 
        MIDIPacketList packetList;
        packetList.numPackets = 1;
 
        packetList.packet->timeStamp = 0;
        packetList.packet->length = 3;
        packetList.packet->data[0] = 0x80 | channel;
        packetList.packet->data[1] = key;
        packetList.packet->data[2] = velocity;
 
        sendMidiPacket ( &packetList );
}
 
void CoreMidiDriver::handleQueueAllNoteOff()
{
        if (cmH2Dst == 0 ) {
                ERRORLOG( "cmH2Dst = 0 " );
                return;
        }
 
        auto instList = Hydrogen::get_instance()->getSong()->getInstrumentList();
 
        unsigned int numInstruments = instList->size();
        for (int index = 0; index < numInstruments; ++index) {
                auto curInst = instList->get(index);
 
                int channel = curInst->get_midi_out_channel();
                if (channel < 0) {
                        continue;
                }
                int key = curInst->get_midi_out_note();
 
                MIDIPacketList packetList;
                packetList.numPackets = 1;
 
                packetList.packet->timeStamp = 0;
                packetList.packet->length = 3;
                packetList.packet->data[0] = 0x80 | channel;
                packetList.packet->data[1] = key;
                packetList.packet->data[2] = 0;
 
                sendMidiPacket ( &packetList );
        }
}
 
void CoreMidiDriver::handleOutgoingControlChange( int param, int value, int channel )
{
        if (cmH2Dst == 0 ) {
                ERRORLOG( "cmH2Dst = 0 " );
                return;
        }
 
        if (channel < 0) {
                return;
        }
 
        MIDIPacketList packetList;
        packetList.numPackets = 1;
 
        packetList.packet->timeStamp = 0;
        packetList.packet->length = 3;
        packetList.packet->data[0] = 0xB0 | channel;
        packetList.packet->data[1] = param;
        packetList.packet->data[2] = value;
 
        sendMidiPacket ( &packetList );
}
 
 
void CoreMidiDriver::sendMidiPacket (MIDIPacketList *packetList)
{
        OSStatus err = noErr;
 
        err = MIDISend(h2OutputRef, cmH2Dst, packetList);
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot send MIDI packet to output port: %1" ).arg( err ));
        }
 
        err = MIDIReceived(h2VirtualOut, packetList);
        if ( err != noErr ) {
                ERRORLOG( QString( "Cannot send MIDI packet to virtual output: %1" ).arg( err ));
        }
}
 
} // namespace H2CORE
#endif