MidiAlsaSeq.h

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/*
 * MidiAlsaSeq.h - ALSA-sequencer-client
 *
 * Copyright (c) 2005-2013 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * 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 (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_MIDI_ALSA_SEQ_H
#define LMMS_MIDI_ALSA_SEQ_H
 
#include "lmmsconfig.h"
 
#ifdef LMMS_HAVE_ALSA
#include <alsa/asoundlib.h>
 
#include <QMap>
#include <QMutex>
#include <QThread>
#include <QTimer>
 
 
#include "MidiClient.h"
 
 
 
 
namespace lmms
{
 
 
class MidiAlsaSeq : public QThread, public MidiClient
{
        Q_OBJECT
public:
        MidiAlsaSeq();
        ~MidiAlsaSeq() override;
 
        static QString probeDevice();
 
 
        inline static QString name()
        {
                return QT_TRANSLATE_NOOP( "MidiSetupWidget",
                        "ALSA-Sequencer (Advanced Linux Sound "
                                                        "Architecture)" );
        }
 
        inline static QString configSection()
        {
                return "Midialsaseq";
        }
 
 
 
        void processOutEvent( const MidiEvent & _me,
                                                const TimePos & _time,
                                                const MidiPort * _port ) override;
 
        void applyPortMode( MidiPort * _port ) override;
        void applyPortName( MidiPort * _port ) override;
 
        void removePort( MidiPort * _port ) override;
 
 
        // list seq-ports from ALSA
        QStringList readablePorts() const override
        {
                return m_readablePorts;
        }
 
        QStringList writablePorts() const override
        {
                return m_writablePorts;
        }
 
        // return name of port which specified MIDI event came from
        QString sourcePortName( const MidiEvent & ) const override;
 
        // (un)subscribe given MidiPort to/from destination-port
        void subscribeReadablePort( MidiPort * _port,
                                                const QString & _dest,
                                                bool _subscribe = true ) override;
        void subscribeWritablePort( MidiPort * _port,
                                                const QString & _dest,
                                                bool _subscribe = true ) override;
        void connectRPChanged( QObject * _receiver,
                                                        const char * _member ) override
        {
                connect( this, SIGNAL( readablePortsChanged() ),
                                                        _receiver, _member );
        }
 
        void connectWPChanged( QObject * _receiver,
                                                        const char * _member ) override
        {
                connect( this, SIGNAL( writablePortsChanged() ),
                                                        _receiver, _member );
        }
 
 
private slots:
        void changeQueueTempo( lmms::bpm_t _bpm );
        void updatePortList();
 
 
private:
        void run() override;
 
#ifdef LMMS_HAVE_ALSA
        QMutex m_seqMutex;
        snd_seq_t * m_seqHandle;
        struct Ports
        {
                Ports() { p[0] = -1; p[1] = -1; }
                int & operator[]( const int _i ) { return p[_i]; }
                private: int p[2];
        } ;
        QMap<MidiPort *, Ports> m_portIDs;
#endif
 
        int m_queueID;
 
        volatile bool m_quit;
 
        QTimer m_portListUpdateTimer;
        QStringList m_readablePorts;
        QStringList m_writablePorts;
 
        int m_pipe[2];
 
 
signals:
        void readablePortsChanged();
        void writablePortsChanged();
 
} ;
 
 
} // namespace lmms
 
#endif // LMMS_HAVE_ALSA
 
#endif // LMMS_MIDI_ALSA_SEQ_H