view plugin/plugins/SamplePlayer.h @ 1196:c7b9c902642f spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release.
There is a new protocol for this. Formerly the threshold parameter had a
range from -50dB to 0 with the default at -50, and -50 treated internally
as "no threshold". However, there was a hardcoded, hidden internal threshold
for spectrogram colour mapping at -80dB with anything below this being rounded
to zero. Now the threshold parameter has range -81 to -1 with the default
at -80, -81 is treated internally as "no threshold", and there is no hidden
internal threshold. So the default behaviour is the same as before, an
effective -80dB threshold, but it is now possible to change this in both
directions. Sessions reloaded from prior versions may look slightly different
because, if the session says there should be no threshold, there will now
actually be no threshold instead of having the hidden internal one.

Still need to do something in the UI to make it apparent that the -81dB
setting removes the threshold entirely. This is at least no worse than the
previous, also obscured, magic -50dB setting.

/* -*- 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