view Source/TouchKeys/MidiInputController.cpp @ 20:dfff66c07936

Lots of minor changes to support building on Visual Studio. A few MSVC-specific #ifdefs to eliminate things Visual Studio doesn't like. This version now compiles on Windows (provided liblo, Juce and pthread are present) but the TouchKeys device support is not yet enabled. Also, the code now needs to be re-checked on Mac and Linux.
author Andrew McPherson <andrewm@eecs.qmul.ac.uk>
date Sun, 09 Feb 2014 18:40:51 +0000
parents 3580ffe87dc8
children 88287c1c2c92
line wrap: on
line source
/*
  TouchKeys: multi-touch musical keyboard control software
  Copyright (c) 2013 Andrew McPherson

  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/>.
 
  =====================================================================
 
  MidiInputController.cpp: handles incoming MIDI data and manages input
  ports. Detailed processing is broken down by keyboard segment; see
  MidiKeyboardSegment.h/cpp for more.
*/


#include "MidiInputController.h"
#include "MidiOutputController.h"
#include "../Mappings/MappingFactory.h"

#undef MIDI_INPUT_CONTROLLER_DEBUG_RAW

// Constructor

MidiInputController::MidiInputController(PianoKeyboard& keyboard) 
: keyboard_(keyboard), midiOutputController_(0), segmentUniqueIdentifier_(0)
{    
    logFileCreated = false;
    loggingActive = false;

}

void MidiInputController::setMidiOutputController(MidiOutputController* ct) {
    midiOutputController_ = ct;
    
    // Propagate the change to the keyboard segments
    ScopedLock sl(segmentsMutex_);
    for(int i = 0; i < segments_.size(); i++) {
        segments_[i]->setMidiOutputController(ct);
    }
}

// ------------------------------------------------------
// create a new MIDI log file, ready to have data written to it
void MidiInputController::createLogFile(string midiLog_filename, string path)
{
    // indicate that we have created a log file (so we can close it later)
    logFileCreated = true;
    
    if (path.compare("") != 0)
    {
        path = path + "/";
    }
    
    midiLog_filename = path + midiLog_filename;
    
    char *fileName = (char*)midiLog_filename.c_str();
    
    // create output file
    midiLog.open (fileName, ios::out | ios::binary);
    midiLog.seekp(0);
}

// ------------------------------------------------------
// close the existing log file
void MidiInputController::closeLogFile()
{
    if (logFileCreated)
    {
        midiLog.close();
        logFileCreated = false;
    }
}

// ------------------------------------------------------
// start logging midi data
void MidiInputController::startLogging()
{
    loggingActive = true;
}

// ------------------------------------------------------
// stop logging midi data
void MidiInputController::stopLogging()
{
    loggingActive = false;
}

// Iterate through the available MIDI devices.  Return a vector containing
// indices and names for each device.  The index will later be passed back
// to indicate which device to open.

vector<pair<int, string> > MidiInputController::availableMidiDevices() {
	vector<pair<int, string> > deviceList;
    
	try {
        StringArray deviceStrings = MidiInput::getDevices();
		
		for(int i = 0; i < deviceStrings.size(); i++) {
			pair<int, string> p(i, string(deviceStrings[i].toUTF8()));
			deviceList.push_back(p);
		}
	}
	catch(...) {
		deviceList.clear();
	}
	
	return deviceList;
}

// Enable a new MIDI port according to its index (returned from availableMidiDevices())
// Returns true on success.

bool MidiInputController::enablePort(int portNumber) {
	if(portNumber < 0)
		return false;
	
    MidiInput *device = MidiInput::openDevice(portNumber, this);
        
    if(device == 0) {
        cout << "Failed to enable MIDI input port " << portNumber << ")\n";
        return false;
    }
    
    //cout << "Enabling MIDI input port " << portNumber << " (" << device->getName() << ")\n";
    device->start();

    // Save the device in the set of ports
    activePorts_[portNumber] = device;

	return true;
}

// Enable all current MIDI ports

bool MidiInputController::enableAllPorts() {
	bool enabledPort = false;
	vector<pair<int, string> > ports = availableMidiDevices();
	vector<pair<int, string> >::iterator it = ports.begin();
	
	while(it != ports.end()) {
		// Don't enable MIDI input from our own virtual output
		if(it->second != string(kMidiVirtualOutputName.toUTF8()))
			enabledPort |= enablePort((it++)->first);
		else
			it++;
	}
	
	return enabledPort;
}

// Remove a specific MIDI input source and free associated memory

void MidiInputController::disablePort(int portNumber) {
	if(activePorts_.count(portNumber) <= 0)
		return;
	
	MidiInput *device = activePorts_[portNumber];

    if(device == 0)
        return;
    
	//cout << "Disabling MIDI input port " << portNumber << " (" << device->getName() << ")\n";
    device->stop();
    delete device;
    
	activePorts_.erase(portNumber);
}

// Remove all MIDI input sources and free associated memory

void MidiInputController::disableAllPorts() {
	map<int, MidiInput*>::iterator it;
	
	//cout << "Disabling all MIDI input ports\n";
	
	it = activePorts_.begin();
	
	while(it != activePorts_.end()) {
        if(it->second == 0) {
            it++;
            continue;
        }
		it->second->stop();                     // disable port
		delete it->second;						// free MidiInputCallback
		it++;
	}
	
	activePorts_.clear();
}

// Return a list of active ports

vector<int> MidiInputController::activePorts() {
    vector<int> ports;
    
	map<int, MidiInput*>::iterator it;
    
    for(it = activePorts_.begin(); it != activePorts_.end(); ++it) {
        ports.push_back(it->first);
    }
    
    return ports;
}

// Add a new keyboard segment. Returns a pointer to the newly created segment
MidiKeyboardSegment* MidiInputController::addSegment(int outputPortNumber,
                                                          int noteMin, int noteMax,
                                                          int channelMask) {
    ScopedLock sl(segmentsMutex_);
    
    // Create a new segment and populate its values
    MidiKeyboardSegment *segment = new MidiKeyboardSegment(keyboard_);
    
    segment->setMidiOutputController(midiOutputController_);
    segment->setOutputPort(outputPortNumber);
    segment->setNoteRange(noteMin, noteMax);
    segment->setChannelMask(channelMask);
    
    // Add the segment to the vector and return the pointer
    segments_.push_back(segment);
    segmentUniqueIdentifier_++;
    return segment;
}

// Remove a segment by index or by object
void MidiInputController::removeSegment(int index) {
    ScopedLock sl(segmentsMutex_);
    
    if(index < 0 || index >= segments_.size())
        return;
    
    MidiKeyboardSegment* segment = segments_[index];
    delete segment;
    segments_.erase(segments_.begin() + index);
    segmentUniqueIdentifier_++;
}

void MidiInputController::removeSegment(MidiKeyboardSegment* segment) {
    ScopedLock sl(segmentsMutex_);
    
    for(int i = 0; i < segments_.size(); i++) {
        if(segments_[i] == segment) {
            delete segment;
            segments_.erase(segments_.begin() + i);
            break;
        }
    }
    segmentUniqueIdentifier_++;
}

void MidiInputController::removeAllSegments() {
    ScopedLock sl(segmentsMutex_);

    for(int i = 0; i < segments_.size(); i++)
        delete segments_[i];
    segments_.clear();
    segmentUniqueIdentifier_++;
}

// Disable any currently active notes

void MidiInputController::allNotesOff() {
    ScopedLock sl(segmentsMutex_);
    
    for(int i = 0; i < segments_.size(); i++)
        segments_[i]->allNotesOff();
}

// This gets called every time MIDI data becomes available on any input controller. source tells
// us where the message came from, and may be 0 if being called internally.

void MidiInputController::handleIncomingMidiMessage(MidiInput* source, const MidiMessage& message)
//void MidiInputController::rtMidiCallback(double deltaTime, vector<unsigned char> *message, int inputNumber)
{
	// Juce will give us one MIDI command per callback, which makes processing easier for us.

    // Ignore sysex messages for now
    if(message.isSysEx())
        return;
    
    // Pull out the raw bytes
    int dataSize = message.getRawDataSize();
    if(dataSize <= 0)
        return;
    const unsigned char *messageData = message.getRawData();
	
    // if logging is active
    if (loggingActive)
    {
        ////////////////////////////////////////////////////////
        ////////////////////////////////////////////////////////
        //////////////////// BEGIN LOGGING /////////////////////
        
        int midi_channel = (int)(messageData[0]);
        int midi_number = dataSize > 1 ? (int)(messageData[1]) : 0;
        int midi_velocity = dataSize > 2 ? (int)(messageData[2]) : 0;
        timestamp_type timestamp = keyboard_.schedulerCurrentTimestamp();
        
        midiLog.write ((char*)&timestamp, sizeof (timestamp_type));
        midiLog.write ((char*)&midi_channel, sizeof (int));
        midiLog.write ((char*)&midi_number, sizeof (int));
        midiLog.write ((char*)&midi_velocity, sizeof (int));
        
        ///////////////////// END LOGGING //////////////////////
        ////////////////////////////////////////////////////////
        ////////////////////////////////////////////////////////
    }
        
#ifdef MIDI_INPUT_CONTROLLER_DEBUG_RAW
    if(source == 0)
        cout << "MIDI Input [internal]: ";
    else
        cout << "MIDI Input [" << source->getName() << "]: ";
	for(int debugPrint = 0; debugPrint < dataSize; debugPrint++)
		printf("%x ", messageData[debugPrint]);
	cout << endl;
#endif /* MIDI_INPUT_CONTROLLER_DEBUG_RAW */
    
    ScopedLock ksl(keyboard_.performanceDataMutex_);
    ScopedLock sl(segmentsMutex_);
    for(int i = 0; i < segments_.size(); i++) {
        if(segments_[i]->respondsToMessage(message))
            segments_[i]->midiHandlerMethod(source, message);
    }
}

// Destructor.  Free any existing callbacks
MidiInputController::~MidiInputController() {
    if(logFileCreated) {
        midiLog.close();
    }
	disableAllPorts();
    removeAllSegments();
}