sequencemanager.h

LINUX下的混音软件

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */

/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.

    This program is Copyright 2000-2007
        Guillaume Laurent   <[e-mail]>,
        Chris Cannam        <[e-mail]>,
        Richard Bown        <[e-mail]>

    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.

    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.

    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _RG_SEQUENCEMANAGER_H_
#define _RG_SEQUENCEMANAGER_H_

#include "base/Composition.h"
#include "base/Event.h"
#include "base/MidiProgram.h"
#include "base/RealTime.h"
#include "base/Track.h"
#include "gui/application/RosegardenDCOP.h"
#include "sound/MappedComposition.h"
#include "sound/MappedEvent.h"
#include <qobject.h>
#include <qstring.h>
#include <vector>
#include <map>


class QTimer;
class QTime;
class QEvent;


namespace Rosegarden
{

class TransportDialog;
class Track;
class TimeSigSegmentMmapper;
class TempoSegmentMmapper;
class SequencerMapper;
class Segment;
class RosegardenGUIDoc;
class MetronomeMmapper;
class CountdownDialog;
class ControlBlockMmapper;
class CompositionMmapper;
class Composition;
class AudioManagerDialog;


class SequenceManager : public QObject, public CompositionObserver
{
    Q_OBJECT
public:
    SequenceManager(RosegardenGUIDoc *doc,
                    TransportDialog *transport);
    ~SequenceManager();

    /**
     * Replaces the internal document
     */
    void setDocument(RosegardenGUIDoc*);

    /**
     * Return the current internal document
     */
    RosegardenGUIDoc* getDocument();

    //
    // Transport controls
    //

    /// returns true if the call actually paused playback
    bool play();

    // We don't call stop() directly - using stopping() and then
    // call stop().
    //
    void stop();

    void stopping();
    void rewind();
    void fastforward();
    void record(bool countIn);
    void rewindToBeginning();
    void fastForwardToEnd();

    void setLoop(const timeT &lhs, const timeT &rhs);
    void notifySequencerStatus(TransportStatus status);
    void sendSequencerJump(const RealTime &time);

    // Events coming in
    void processAsynchronousMidi(const MappedComposition &mC,
                                 AudioManagerDialog *aMD);

    // Before playing and recording.  If warnUser is true, show the
    // user a warning dialog if there is a problem with the setup.
    //
    void checkSoundDriverStatus(bool warnUser);

    /**
     * Send program changes and align Instrument lists before playback
     * starts.
     * Also called at document loading (with arg set to true) to reset all instruments
     * (fix for bug 820174)
     *
     * @arg forceProgramChanges if true, always send program changes even if the instrument is
     * set not to send any.
     */
    void preparePlayback(bool forceProgramChanges = false);

    /// Check and set sequencer status
    void setTransportStatus(const TransportStatus &status);
    TransportStatus getTransportStatus() const { return m_transportStatus; }

    /**
     * Suspend the sequencer to allow for a safe DCOP call() i.e. one
     * when we don't hang both clients 'cos they're blocking on each
     * other.
     */
    void suspendSequencer(bool value);

    /// Send the audio level to VU meters
    void sendAudioLevel(MappedEvent *mE);

    /// Find what has been initialised and what hasn't
    unsigned int getSoundDriverStatus() { return m_soundDriverStatus; }

    /// Reset MIDI controllers
    void resetControllers();

    /// Reset MIDI network
    void resetMidiNetwork();

    /// Reinitialise the studio
    void reinitialiseSequencerStudio();

    /// Send JACK and MMC transport control statuses
    void sendTransportControlStatuses();

    /// Send all note offs and resets to MIDI devices
    void panic();

    /// Send an MC to the view
    void showVisuals(const MappedComposition &mC);

    /// Apply in-situ filtering to a MappedComposition
    MappedComposition
        applyFiltering(const MappedComposition &mC,
                       MappedEvent::MappedEventType filter);

    CountdownDialog* getCountdownDialog() { return m_countdownDialog; }


    //
    // CompositionObserver interface
    //
    virtual void segmentAdded              (const Composition*, Segment*);
    virtual void segmentRemoved            (const Composition*, Segment*);
    virtual void segmentRepeatChanged      (const Composition*, Segment*, bool);
    virtual void segmentRepeatEndChanged   (const Composition*, Segment*, timeT);
    virtual void segmentEventsTimingChanged(const Composition*, Segment *, timeT delay, RealTime rtDelay);
    virtual void segmentTransposeChanged   (const Composition*, Segment *, int transpose);
    virtual void segmentTrackChanged       (const Composition*, Segment *, TrackId id);
    virtual void segmentEndMarkerChanged   (const Composition*, Segment *, bool);
    virtual void endMarkerTimeChanged      (const Composition*, bool shorten);
    virtual void trackChanged              (const Composition*, Track*);
    virtual void trackDeleted              (const Composition*, TrackId);
    virtual void timeSignatureChanged      (const Composition*);
    virtual void metronomeChanged          (const Composition*);
    virtual void soloChanged               (const Composition*, bool solo, TrackId selectedTrack);
    virtual void tempoChanged              (const Composition*);

    void processAddedSegment(Segment*);
    void processRemovedSegment(Segment*);
    void segmentModified(Segment*);

    virtual bool event(QEvent *e);

    /// for the gui to call to indicate that the metronome needs to be remapped
    void metronomeChanged(InstrumentId id, bool regenerateTicks);

    /// for the gui to call to indicate that a MIDI filter needs to be remapped
    void filtersChanged(MidiFilter thruFilter,
                        MidiFilter recordFilter);

    /// Return the current sequencer memory mapped file
    SequencerMapper* getSequencerMapper() { return m_sequencerMapper; }

    /// Ensure that the sequencer file is mapped
    void mapSequencer();

    void setTransport(TransportDialog* t) { m_transport = t; }
    
    void enableMIDIThruRouting(bool state);
    
    int getSampleRate(); // may return 0 if sequencer uncontactable

public slots:

    void update();

signals:
    void setProgress(int);
    void incrementProgress(int);

    void insertableNoteOnReceived(int pitch, int velocity);
    void insertableNoteOffReceived(int pitch, int velocity);
    void controllerDeviceEventReceived(MappedEvent *ev);
    
protected slots:
    void slotCountdownTimerTimeout();

    // Activated by timer to allow a message to be reported to 
    // the user - we use this mechanism so that the user isn't
    // bombarded with dialogs in the event of lots of failures.
    //
    void slotAllowReport() { m_canReport = true; }

    void slotFoundMountPoint(const QString&,
                             unsigned long kBSize,
                             unsigned long kBUsed,
                             unsigned long kBAvail);

    void slotScheduledCompositionMmapperReset() { resetCompositionMmapper(); }
    
protected:

    void resetCompositionMmapper();
    void resetControlBlockMmapper();
    void resetMetronomeMmapper();
    void resetTempoSegmentMmapper();
    void resetTimeSigSegmentMmapper();
    void checkRefreshStatus();
    void sendMIDIRecordingDevice(const QString recordDeviceStr);
    void restoreRecordSubscriptions();
    bool shouldWarnForImpreciseTimer();
    
    //--------------- Data members ---------------------------------

    MappedComposition  m_mC;
    RosegardenGUIDoc              *m_doc;
    CompositionMmapper            *m_compositionMmapper;
    ControlBlockMmapper           *m_controlBlockMmapper;
    MetronomeMmapper              *m_metronomeMmapper;
    TempoSegmentMmapper           *m_tempoSegmentMmapper;
    TimeSigSegmentMmapper         *m_timeSigSegmentMmapper;

    std::vector<Segment*> m_addedSegments;
    std::vector<Segment*> m_removedSegments;
    bool m_metronomeNeedsRefresh;

    // statuses
    TransportStatus            m_transportStatus;
    unsigned int               m_soundDriverStatus;

    // pointer to the transport dialog
    TransportDialog *m_transport;

    clock_t                    m_lastRewoundAt;

    CountdownDialog           *m_countdownDialog;
    QTimer                    *m_countdownTimer;

    bool                      m_shownOverrunWarning;

    // Keep a track of elapsed record time with this object
    //
    QTime                     *m_recordTime;

    typedef std::map<Segment *, int> SegmentRefreshMap;
    SegmentRefreshMap m_segments; // map to refresh status id
    SegmentRefreshMap m_triggerSegments;
    unsigned int m_compositionRefreshStatusId;
    bool m_updateRequested;

    // used to schedule a composition mmapper reset when the composition end time marker changes
    // this can be caused by a window resize, and since the reset is potentially expensive we want to collapse
    // several following requests into one.
    QTimer                    *m_compositionMmapperResetTimer;

    // Information that the sequencer is providing to us - for the moment
    // it's only the position pointer.
    //
    SequencerMapper          *m_sequencerMapper;

    // Just to make sure we don't bother the user too often
    //
    QTimer                    *m_reportTimer;
    bool                       m_canReport;

    bool                       m_gotDiskSpaceResult;
    unsigned long              m_diskSpaceKBAvail;

    bool                       m_lastLowLatencySwitchSent;

    timeT                      m_lastTransportStartPosition;

    int                        m_sampleRate;
};




}

#endif