annotate data/model/NoteData.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 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 NOTE_DATA_H
#define NOTE_DATA_H

#include <vector>

#include "base/Pitch.h"

struct NoteData
{
    NoteData(sv_frame_t _start, sv_frame_t _dur, int _mp, int _vel) :
	start(_start), duration(_dur), midiPitch(_mp), frequency(0),
	isMidiPitchQuantized(true), velocity(_vel), channel(0) { };
            
    sv_frame_t start;       // audio sample frame
    sv_frame_t duration;    // in audio sample frames
    int midiPitch;   // 0-127
    float frequency; // Hz, to be used if isMidiPitchQuantized false
    bool isMidiPitchQuantized;
    int velocity;    // MIDI-style 0-127
    int channel;     // MIDI 0-15

    float getFrequency() const {
        if (isMidiPitchQuantized) {
            return float(Pitch::getFrequencyForPitch(midiPitch));
        } else {
            return frequency;
        }
    }
};

typedef std::vector<NoteData> NoteList;

class NoteExportable
{
public:
    virtual NoteList getNotes() const = 0;
    virtual NoteList getNotesWithin(sv_frame_t startFrame, sv_frame_t endFrame) const = 0;
};

#endif