view plugin/plugins/SamplePlayer.h @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.

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

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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 _SAMPLE_PLAYER_H_
#define _SAMPLE_PLAYER_H_

#define DSSI_API_LEVEL 2

#include "../api/ladspa.h"
#include "../api/dssi.h"

#include <seq_event.h>

#include <QMutex>
#include <QString>
#include <vector>

class SamplePlayer
{
public:
    static const DSSI_Descriptor *getDescriptor(unsigned long index);

private:
    SamplePlayer(int sampleRate);
    ~SamplePlayer();

    enum {
        OutputPort    = 0,
        RetunePort    = 1,
        BasePitchPort = 2,
        ConcertAPort  = 3,
        SustainPort   = 4,
        ReleasePort   = 5,
        PortCount     = 6
    };

    enum {
        Polyphony = 128
    };

    static const char *const portNames[PortCount];
    static const LADSPA_PortDescriptor ports[PortCount];
    static const LADSPA_PortRangeHint hints[PortCount];
    static const LADSPA_Properties properties;
    static const LADSPA_Descriptor ladspaDescriptor;
    static const DSSI_Descriptor dssiDescriptor;
    static const DSSI_Host_Descriptor *hostDescriptor;

    static LADSPA_Handle instantiate(const LADSPA_Descriptor *, unsigned long);
    static void connectPort(LADSPA_Handle, unsigned long, LADSPA_Data *);
    static void activate(LADSPA_Handle);
    static void run(LADSPA_Handle, unsigned long);
    static void deactivate(LADSPA_Handle);
    static void cleanup(LADSPA_Handle);
    static char *configure(LADSPA_Handle, const char *, const char *);
    static const DSSI_Program_Descriptor *getProgram(LADSPA_Handle, unsigned long);
    static void selectProgram(LADSPA_Handle, unsigned long, unsigned long);
    static int getMidiController(LADSPA_Handle, unsigned long);
    static void runSynth(LADSPA_Handle, unsigned long,
                         snd_seq_event_t *, unsigned long);
    static void receiveHostDescriptor(const DSSI_Host_Descriptor *descriptor);
    static void workThreadCallback(LADSPA_Handle);

    void searchSamples();
    void loadSampleData(QString path);
    void runImpl(unsigned long, snd_seq_event_t *, unsigned long);
    void addSample(int, unsigned long, unsigned long);

    float *m_output;
    float *m_retune;
    float *m_basePitch;
    float *m_concertA;
    float *m_sustain;
    float *m_release;

    float *m_sampleData;
    size_t m_sampleCount;
    int m_sampleRate;

    long m_ons[Polyphony];
    long m_offs[Polyphony];
    int m_velocities[Polyphony];
    long m_sampleNo;

    QString m_sampleDir;
    QString m_program;
    std::vector<std::pair<QString, QString> > m_samples; // program name, path
    bool m_sampleSearchComplete;
    int m_pendingProgramChange;

    QMutex m_mutex;
};


#endif