view plugin/plugins/SamplePlayer.h @ 6:44bbf5793d84

* Rework handling of layer properties in file I/O -- we now get the individual
  layers to load and save them rather than doing it via generic property lists
  in the base class, so as to ensure we read and write meaningful values rather
  than generic int values requiring conversion.

/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */

/*
    A waveform viewer and audio annotation editor.
    Chris Cannam, Queen Mary University of London, 2005-2006
    
    This is experimental software.  Not for distribution.
*/

#ifndef _SAMPLE_PLAYER_H_
#define _SAMPLE_PLAYER_H_

#define DSSI_API_LEVEL 2

#include <ladspa.h>
#include <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,
	SustainPort   = 3,
	ReleasePort   = 4,
	PortCount     = 5
    };

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

    QMutex m_mutex;
};


#endif