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/*
Drumstick MIDI realtime input-output
Copyright (C) 2009-2024 Pedro Lopez-Cabanillas <plcl@users.sf.net>
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 "midiparser.h"
#include <drumstick/rtmidioutput.h>
namespace drumstick {
namespace rt {
class MIDIParser::MIDIParserPrivate {
public:
MIDIParserPrivate(): m_in(nullptr), m_out(nullptr), m_running_status(0) { }
MIDIInput *m_in;
MIDIOutput *m_out;
unsigned char m_running_status;
QByteArray m_buffer;
void processNoteOff(const int chan, const int note, const int vel)
{
//qDebug() << "NoteOff(" << hex << chan << "," << note << "," << vel << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendNoteOff(chan, note, vel);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiNoteOff(chan, note, vel);
}
}
void processNoteOn(const int chan, const int note, const int vel)
{
//qDebug() << "NoteOn(" << hex << chan << "," << note << "," << vel << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendNoteOn(chan, note, vel);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiNoteOn(chan, note, vel);
}
}
void processKeyPressure(const int chan, const int note, const int value)
{
//qDebug() << "KeyPressure(" << hex << chan << "," << note << "," << value << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendKeyPressure(chan, note, value);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiKeyPressure(chan, note, value);
}
}
void processController(const int chan, const int control, const int value)
{
//qDebug() << "Controller(" << chan << "," << control << "," << value << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendController(chan, control, value);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiController(chan, control, value);
}
}
void processProgram(const int chan, const int program)
{
//qDebug() << "Program(" << hex << chan << "," << program << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendProgram(chan, program);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiProgram(chan, program);
}
}
void processChannelPressure(const int chan, const int value)
{
//qDebug() << "ChannelPressure(" << chan << "," << value << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendChannelPressure(chan, value);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiChannelPressure(chan, value);
}
}
void processPitchBend(const int chan, const int value)
{
//qDebug() << "PitchBend(" << chan << "," << value << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendPitchBend(chan, value);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiPitchBend(chan, value);
}
}
void processSysex(const QByteArray &data)
{
//qDebug() << "Sysex(" << data.toHex() << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendSysex(data);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiSysex(data);
}
}
void processSystemCommon(const int status)
{
//qDebug() << "common SystemMsg(" << hex << status << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendSystemMsg(status);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiSystemCommon(status);
}
}
void processSystemRealtime(unsigned char byte)
{
//qDebug() << "realtime SystemMsg(" << hex << byte << ")";
if (m_in != nullptr && m_in->isEnabledMIDIThru() && m_out != nullptr) {
m_out->sendSystemMsg(byte);
}
if (m_in != nullptr) {
Q_EMIT m_in->midiSystemRealtime(byte);
}
}
};
MIDIParser::MIDIParser(MIDIInput *in, QObject *parent) :
QObject(parent),
d(new MIDIParser::MIDIParserPrivate)
{
d->m_buffer.clear();
d->m_in = in;
}
MIDIParser::~MIDIParser()
{
delete d;
}
void MIDIParser::setMIDIThruDevice(MIDIOutput *device)
{
d->m_out = device;
}
void MIDIParser::parse(unsigned char byte)
{
if (byte >= MIDI_STATUS_REALTIME) { // system realtime
d->processSystemRealtime(byte);
return;
} else
d->m_buffer.append(byte);
while(d->m_buffer.length() > 0) {
int chan, m1, m2, v;
unsigned char status = static_cast<unsigned>(d->m_buffer.at(0));
if (status == MIDI_STATUS_SYSEX) { // system exclusive
if (byte == MIDI_STATUS_ENDSYSEX) {
d->processSysex(d->m_buffer);
d->m_buffer.clear();
} else
return;
} else
if (status > MIDI_STATUS_SYSEX &&
status < MIDI_STATUS_ENDSYSEX) { // system common
d->processSystemCommon(status);
d->m_buffer.clear();
} else
if (status < MIDI_STATUS_SYSEX &&
status >= MIDI_STATUS_NOTEOFF) { // channel message
d->m_running_status = status;
chan = status & MIDI_CHANNEL_MASK;
status = status & MIDI_STATUS_MASK;
switch(status) {
case MIDI_STATUS_NOTEOFF:
if (d->m_buffer.length() < 3)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
m2 = static_cast<unsigned>(d->m_buffer.at(2));
d->processNoteOff(chan, m1, m2);
break;
case MIDI_STATUS_NOTEON:
if (d->m_buffer.length() < 3)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
m2 = static_cast<unsigned>(d->m_buffer.at(2));
d->processNoteOn(chan, m1, m2);
break;
case MIDI_STATUS_KEYPRESURE:
if (d->m_buffer.length() < 3)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
m2 = static_cast<unsigned>(d->m_buffer.at(2));
d->processKeyPressure(chan, m1, m2);
break;
case MIDI_STATUS_CONTROLCHANGE:
if (d->m_buffer.length() < 3)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
m2 = static_cast<unsigned>(d->m_buffer.at(2));
d->processController(chan, m1, m2);
break;
case MIDI_STATUS_PROGRAMCHANGE:
if (d->m_buffer.length() < 2)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
d->processProgram(chan, m1);
break;
case MIDI_STATUS_CHANNELPRESSURE:
if (d->m_buffer.length() < 2)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
d->processChannelPressure(chan, m1);
break;
case MIDI_STATUS_PITCHBEND:
if (d->m_buffer.length() < 3)
return;
m1 = static_cast<unsigned>(d->m_buffer.at(1));
m2 = static_cast<unsigned>(d->m_buffer.at(2));
v = m1 + m2 * 0x80 - 0x2000;
d->processPitchBend(chan, v);
break;
}
d->m_buffer.clear();
} else { // running status
d->m_buffer.insert(0, d->m_running_status);
}
}
}
void MIDIParser::parse(QByteArray bytes)
{
foreach(unsigned char byte, bytes) {
parse(byte);
}
}
} // namespace rt
} // namespace drumstick
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