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//=========================================================
// MusE
// Linux Music Editor
// $Id: alsamidi.h,v 1.2 2004/01/14 09:06:43 wschweer Exp $
// (C) Copyright 2001 Werner Schweer (ws@seh.de)
// (C) Copyright 2011 Tim E. Real (terminator356 on sourceforge)
//
// 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; 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=========================================================
#ifndef __ALSAMIDI_H__
#define __ALSAMIDI_H__
#include <config.h>
#include <alsa/asoundlib.h>
#include "mpevent.h"
#include "mididev.h"
namespace MusECore {
class Xml;
//---------------------------------------------------------
// MidiAlsaDevice
//---------------------------------------------------------
class MidiAlsaDevice : public MidiDevice {
public:
snd_seq_addr_t adr;
private:
// Special for ALSA midi device: Play event list is processed in the ALSA midi sequencer thread.
// Need this FIFO, to decouple from audio thread which adds events to the list.
MusECore::MidiFifo playEventFifo;
MusECore::MidiFifo stuckNotesFifo;
volatile bool stopPending;
volatile bool seekPending;
virtual QString open();
virtual void close();
virtual void processInput() {}
virtual int selectRfd() { return -1; }
virtual int selectWfd();
bool putEvent(snd_seq_event_t*);
virtual bool putMidiEvent(const MusECore::MidiPlayEvent&);
public:
MidiAlsaDevice(const snd_seq_addr_t&, const QString& name);
virtual ~MidiAlsaDevice() {}
virtual void* inClientPort() { return (void*)&adr; } // For ALSA midi, in/out client ports are the same.
virtual void* outClientPort() { return (void*)&adr; } // That is, ALSA midi client ports can be both r/w.
virtual void writeRouting(int, Xml&) const;
virtual inline int deviceType() const { return ALSA_MIDI; }
// Schedule an event for playback. Returns false if event cannot be delivered.
virtual bool addScheduledEvent(const MusECore::MidiPlayEvent& ev) { return !playEventFifo.put(ev); }
// Add a stuck note. Returns false if event cannot be delivered.
virtual bool addStuckNote(const MusECore::MidiPlayEvent& ev) { return !stuckNotesFifo.put(ev); }
// Play all events up to current frame.
virtual void processMidi();
virtual void handleStop();
virtual void handleSeek();
};
extern bool initMidiAlsa();
extern void exitMidiAlsa();
extern int alsaSelectRfd();
extern int alsaSelectWfd();
extern void alsaProcessMidiInput();
extern void alsaScanMidiPorts();
} // namespace MusECore
#endif
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