C++ MidiEvent::channel方法代码示例

void MidiPort::processInEvent( const MidiEvent& event, const MidiTime& time )
{
	// mask event
	if( isInputEnabled() &&
		( inputChannel() == 0 || inputChannel()-1 == event.channel() ) )
	{
		MidiEvent inEvent = event;
		if( event.type() == MidiNoteOn ||
			event.type() == MidiNoteOff ||
			event.type() == MidiKeyPressure )
		{
			if( inEvent.key() < 0 || inEvent.key() >= NumKeys )
			{
				return;
			}
		}

		if( fixedInputVelocity() >= 0 && inEvent.velocity() > 0 )
		{
			inEvent.setVelocity( fixedInputVelocity() );
		}

		m_midiEventProcessor->processInEvent( inEvent, time );
	}
}

void MidiWinMM::processOutEvent( const MidiEvent& event, const MidiTime& time, const MidiPort* port )
{
	const DWORD shortMsg = ( event.type() + event.channel() ) +
				( ( event.param( 0 ) & 0xff ) << 8 ) +
				( ( event.param( 1 ) & 0xff ) << 16 );

	QStringList outDevs;
	for( SubMap::ConstIterator it = m_outputSubs.begin(); it != m_outputSubs.end(); ++it )
	{
		for( MidiPortList::ConstIterator jt = it.value().begin(); jt != it.value().end(); ++jt )
		{
			if( *jt == port )
			{
				outDevs += it.key();
				break;
			}
		}
	}

	for( QMap<HMIDIOUT, QString>::Iterator it = m_outputDevices.begin(); it != m_outputDevices.end(); ++it )
	{
		if( outDevs.contains( *it ) )
		{
			midiOutShortMsg( it.key(), shortMsg );
		}
	}
}

void Zerberus::process(const MidiEvent& event)
      {
      if (busy)
            return;
      Channel* cp = _channel[int(event.channel())];
      if (cp->instrument() == 0) {
//            printf("Zerberus::process(): no instrument for channel %d\n", event.channel());
            return;
            }

      switch(event.type()) {
            case MidiEventType::NOTEOFF:
                  processNoteOff(cp, event.dataA());
                  break;
            case MidiEventType::NOTEON: {
                  int key = event.dataA();
                  int vel = event.dataB();
                  if (vel)
                        processNoteOn(cp, key, vel);
                  else
                        processNoteOff(cp, key);
                  }
                  break;
            case MidiEventType::CONTROLLER:
                  cp->controller(event.dataA(), event.dataB());
                  break;
            default:
                  printf("event type 0x%02x\n", event.type());
                  break;
            }
      }

void LocalZynAddSubFx::processMidiEvent( const MidiEvent& event )
{
	// all functions are called while m_master->mutex is held
	static NULLMidiIn midiIn;

	switch( event.type() )
	{
		case MidiNoteOn:
			if( event.velocity() > 0 )
			{
				if( event.key() <= 0 || event.key() >= 128 )
				{
					break;
				}
				if( m_runningNotes[event.key()] > 0 )
				{
					m_master->NoteOff( event.channel(), event.key() );
				}
				++m_runningNotes[event.key()];
				m_master->NoteOn( event.channel(), event.key(), event.velocity() );
				break;
			}
		case MidiNoteOff:
			if( event.key() <= 0 || event.key() >= 128 )
			{
				break;
			}
			if( --m_runningNotes[event.key()] <= 0 )
			{
				m_master->NoteOff( event.channel(), event.key() );
			}
			break;
		case MidiPitchBend:
			m_master->SetController( event.channel(), C_pitchwheel, event.pitchBend()-8192 );
			break;
		case MidiControlChange:
			m_master->SetController( event.channel(), midiIn.getcontroller( event.controllerNumber() ), event.controllerValue() );
			break;
		default:
			break;
	}
}

MIDIPacketList MidiApple::createMidiPacketList( const MidiEvent& event )
{
	MIDIPacketList packetList;
	packetList.numPackets = 1;
	MIDIPacket* firstPacket = &packetList.packet[0];
	firstPacket->timeStamp = 0; // send immediately
	firstPacket->length = 3;
	firstPacket->data[0] = ( event.type() + event.channel() );
	firstPacket->data[1] = ( event.param( 0 ) & 0xff );
	firstPacket->data[2] = ( event.param( 1 ) & 0xff );
	return packetList;
}

void RemotePlugin::processMidiEvent( const MidiEvent & _e,
							const f_cnt_t _offset )
{
	message m( IdMidiEvent );
	m.addInt( _e.type() );
	m.addInt( _e.channel() );
	m.addInt( _e.param( 0 ) );
	m.addInt( _e.param( 1 ) );
	m.addInt( _offset );
	lock();
	sendMessage( m );
	unlock();
}

void LocalZynAddSubFx::processMidiEvent( const MidiEvent& event )
{
	switch( event.type() )
	{
		case MidiNoteOn:
			if( event.velocity() > 0 )
			{
				if( event.key() < 0 || event.key() > MidiMaxKey )
				{
					break;
				}
				if( m_runningNotes[event.key()] > 0 )
				{
					m_master->noteOff( event.channel(), event.key() );
				}
				++m_runningNotes[event.key()];
				m_master->noteOn( event.channel(), event.key(), event.velocity() );
				break;
			}
		case MidiNoteOff:
			if( event.key() < 0 || event.key() > MidiMaxKey )
			{
				break;
			}
			if( --m_runningNotes[event.key()] <= 0 )
			{
				m_master->noteOff( event.channel(), event.key() );
			}
			break;
		case MidiPitchBend:
			m_master->setController( event.channel(), C_pitchwheel, event.pitchBend()-8192 );
			break;
		case MidiControlChange:
			m_master->setController( event.channel(), event.controllerNumber(), event.controllerValue() );
			break;
		default:
			break;
	}
}

void MidiFile::writeEvent(const MidiEvent& event)
      {
      switch(event.type()) {
            case ME_NOTEON:
                  writeStatus(ME_NOTEON, event.channel());
                  put(event.pitch());
                  put(event.velo());
                  break;

            case ME_NOTEOFF:
                  writeStatus(ME_NOTEOFF, event.channel());
                  put(event.pitch());
                  put(event.velo());
                  break;

            case ME_CONTROLLER:
                  switch(event.controller()) {
                        case CTRL_PROGRAM:
                              writeStatus(ME_PROGRAM, event.channel());
                              put(event.value() & 0x7f);
                              break;
                        case CTRL_PITCH:
                              {
                              writeStatus(ME_PITCHBEND, event.channel());
                              int v = event.value() + 8192;
                              put(v & 0x7f);
                              put((v >> 7) & 0x7f);
                              }
                              break;
                        case CTRL_PRESS:
                              writeStatus(ME_AFTERTOUCH, event.channel());
                              put(event.value() & 0x7f);
                              break;
                        default:
                              writeStatus(ME_CONTROLLER, event.channel());
                              put(event.controller());
                              put(event.value() & 0x7f);
                              break;
                        }
                  break;

            case ME_META:
                  put(ME_META);
                  put(event.metaType());
                  putvl(event.len());
                  write(event.edata(), event.len());
                  resetRunningStatus();     // really ?!
                  break;

            case ME_SYSEX:
                  put(ME_SYSEX);
                  putvl(event.len() + 1);  // including 0xf7
                  write(event.edata(), event.len());
                  put(ME_ENDSYSEX);
                  resetRunningStatus();
                  break;
            }
      }

void MidiPort::processOutEvent( const MidiEvent& event, const MidiTime& time )
{
	// mask event
	if( isOutputEnabled() && realOutputChannel() == event.channel() )
	{
		MidiEvent outEvent = event;

		if( fixedOutputVelocity() >= 0 && event.velocity() > 0 &&
			( event.type() == MidiNoteOn || event.type() == MidiKeyPressure ) )
		{
			outEvent.setVelocity( fixedOutputVelocity() );
		}

		m_midiClient->processOutEvent( outEvent, time, this );
	}
}

void MidiController::processInEvent( const MidiEvent& event, const MidiTime& time, f_cnt_t offset )
{
	unsigned char controllerNum;
	switch( event.type() )
	{
		case MidiControlChange:
			controllerNum = event.controllerNumber();

			if( m_midiPort.inputController() == controllerNum + 1 &&
					( m_midiPort.inputChannel() == event.channel() + 1 ||
					  m_midiPort.inputChannel() == 0 ) )
			{
				unsigned char val = event.controllerValue();
				m_previousValue = m_lastValue;
				m_lastValue = (float)( val ) / 127.0f;
				emit valueChanged();
			}
			break;

		default:
			// Don't care - maybe add special cases for pitch and mod later
			break;
	}
}

void InstrumentTrack::processInEvent( const MidiEvent& event, const MidiTime& time, f_cnt_t offset )
{
	bool eventHandled = false;

	switch( event.type() )
	{
		// we don't send MidiNoteOn, MidiNoteOff and MidiKeyPressure
		// events to instrument as NotePlayHandle will send them on its
		// own
		case MidiNoteOn:
			if( event.velocity() > 0 )
			{
				NotePlayHandle* nph;
				m_notesMutex.lock();
				if( m_notes[event.key()] == NULL )
				{
					nph = NotePlayHandleManager::acquire( this, offset,
								typeInfo<f_cnt_t>::max() / 2,
								Note( MidiTime(), MidiTime(), event.key(), event.volume( midiPort()->baseVelocity() ) ),
								NULL, event.channel(),
								NotePlayHandle::OriginMidiInput );
					m_notes[event.key()] = nph;
					if( ! Engine::mixer()->addPlayHandle( nph ) )
					{
						m_notes[event.key()] = NULL;
					}
				}
				m_notesMutex.unlock();
				eventHandled = true;
				break;
			}

		case MidiNoteOff:
			m_notesMutex.lock();
			if( m_notes[event.key()] != NULL )
			{
				// do actual note off and remove internal reference to NotePlayHandle (which itself will
				// be deleted later automatically)
				m_notes[event.key()]->noteOff( offset );
				m_notes[event.key()] = NULL;
			}
			m_notesMutex.unlock();
			eventHandled = true;
			break;

		case MidiKeyPressure:
			if( m_notes[event.key()] != NULL )
			{
				// setVolume() calls processOutEvent() with MidiKeyPressure so the
				// attached instrument will receive the event as well
				m_notes[event.key()]->setVolume( event.volume( midiPort()->baseVelocity() ) );
			}
			eventHandled = true;
			break;

		case MidiPitchBend:
			// updatePitch() is connected to m_pitchModel::dataChanged() which will send out
			// MidiPitchBend events
			m_pitchModel.setValue( m_pitchModel.minValue() + event.pitchBend() * m_pitchModel.range() / MidiMaxPitchBend );
			break;

		case MidiControlChange:
			if( event.controllerNumber() == MidiControllerSustain )
			{
				if( event.controllerValue() > MidiMaxControllerValue/2 )
				{
					m_sustainPedalPressed = true;
				}
				else
				{
					m_sustainPedalPressed = false;
				}
			}
			if( event.controllerNumber() == MidiControllerAllSoundOff ||
				event.controllerNumber() == MidiControllerAllNotesOff ||
				event.controllerNumber() == MidiControllerOmniOn ||
				event.controllerNumber() == MidiControllerOmniOff ||
				event.controllerNumber() == MidiControllerMonoOn ||
				event.controllerNumber() == MidiControllerPolyOn )
			{
				silenceAllNotes();
			}
			break;

		case MidiMetaEvent:
			// handle special cases such as note panning
			switch( event.metaEvent() )
			{
				case MidiNotePanning:
					if( m_notes[event.key()] != NULL )
					{
						eventHandled = true;
						m_notes[event.key()]->setPanning( event.panning() );
					}
					break;
				default:
					qWarning( "InstrumentTrack: unhandled MIDI meta event: %i", event.metaEvent() );
					break;
			}
			break;
//.........这里部分代码省略.........

void MidiAlsaSeq::processOutEvent( const MidiEvent& event, const MidiTime& time, const MidiPort* port )
{
	// HACK!!! - need a better solution which isn't that easy since we
	// cannot store const-ptrs in our map because we need to call non-const
	// methods of MIDI-port - it's a mess...
	MidiPort* p = const_cast<MidiPort *>( port );

	snd_seq_event_t ev;
	snd_seq_ev_clear( &ev );
	snd_seq_ev_set_source( &ev, ( m_portIDs[p][1] != -1 ) ?
					m_portIDs[p][1] : m_portIDs[p][0] );
	snd_seq_ev_set_subs( &ev );
	snd_seq_ev_schedule_tick( &ev, m_queueID, 1, static_cast<int>( time ) );
	ev.queue =  m_queueID;
	switch( event.type() )
	{
		case MidiNoteOn:
			snd_seq_ev_set_noteon( &ev,
						event.channel(),
						event.key() + KeysPerOctave,
						event.velocity() );
			break;

		case MidiNoteOff:
			snd_seq_ev_set_noteoff( &ev,
						event.channel(),
						event.key() + KeysPerOctave,
						event.velocity() );
			break;

		case MidiKeyPressure:
			snd_seq_ev_set_keypress( &ev,
						event.channel(),
						event.key() + KeysPerOctave,
						event.velocity() );
			break;

		case MidiControlChange:
			snd_seq_ev_set_controller( &ev,
						event.channel(),
						event.controllerNumber(),
						event.controllerValue() );
			break;

		case MidiProgramChange:
			snd_seq_ev_set_pgmchange( &ev,
						event.channel(),
						event.program() );
			break;

		case MidiChannelPressure:
			snd_seq_ev_set_chanpress( &ev,
						event.channel(),
						event.channelPressure() );
			break;

		case MidiPitchBend:
			snd_seq_ev_set_pitchbend( &ev,
						event.channel(),
						event.param( 0 ) - 8192 );
			break;

		default:
			qWarning( "MidiAlsaSeq: unhandled output event %d\n", (int) event.type() );
			return;
	}

	m_seqMutex.lock();
	snd_seq_event_output( m_seqHandle, &ev );
	snd_seq_drain_output( m_seqHandle );
	m_seqMutex.unlock();

}

bool CarlaInstrument::handleMidiEvent(const MidiEvent& event, const MidiTime&, f_cnt_t offset)
{
    const QMutexLocker ml(&fMutex);

    if (fMidiEventCount >= kMaxMidiEvents)
        return false;

    NativeMidiEvent& nEvent(fMidiEvents[fMidiEventCount++]);
    std::memset(&nEvent, 0, sizeof(NativeMidiEvent));

    nEvent.port    = 0;
    nEvent.time    = offset;
    nEvent.data[0] = event.type() | (event.channel() & 0x0F);

    switch (event.type())
    {
    case MidiNoteOn:
        if (event.velocity() > 0)
        {
            if (event.key() < 0 || event.key() > MidiMaxKey)
                break;

            nEvent.data[1] = event.key();
            nEvent.data[2] = event.velocity();
            nEvent.size    = 3;
            break;
        }
        else
        {
            nEvent.data[0] = MidiNoteOff | (event.channel() & 0x0F);
            // nobreak
        }

    case MidiNoteOff:
        if (event.key() < 0 || event.key() > MidiMaxKey)
            break;

        nEvent.data[1] = event.key();
        nEvent.data[2] = event.velocity();
        nEvent.size    = 3;
        break;

    case MidiKeyPressure:
        nEvent.data[1] = event.key();
        nEvent.data[2] = event.velocity();
        nEvent.size    = 3;
        break;

    case MidiControlChange:
        nEvent.data[1] = event.controllerNumber();
        nEvent.data[2] = event.controllerValue();
        nEvent.size    = 3;
        break;

    case MidiProgramChange:
        nEvent.data[1] = event.program();
        nEvent.size    = 2;
        break;

    case MidiChannelPressure:
        nEvent.data[1] = event.channelPressure();
        nEvent.size    = 2;
        break;

    case MidiPitchBend:
        nEvent.data[1] = event.pitchBend() & 0x7f;
        nEvent.data[2] = event.pitchBend() >> 7;
        nEvent.size    = 3;
        break;

    default:
        // unhandled
        --fMidiEventCount;
        break;
    }

    return true;
}