view transform/TransformDescription.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 2006-2007 Chris Cannam and QMUL.
   
    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 _TRANSFORM_DESCRIPTION_H_
#define _TRANSFORM_DESCRIPTION_H_

#include "Transform.h"

#include <QString>

#include <vector>

/**
 * Metadata associated with a transform.
 *
 * The transform ID is the same as that used in the Transform class.
 * It is intended to be computer-referenceable and unique within the
 * application.
 * 
 * The name is intended to be human readable.  In principle it doesn't
 * have to be unique, but the factory that creates these objects
 * should add suffixes to ensure that it is, all the same (just to
 * avoid user confusion).
 *
 * The friendly name is a shorter version of the name.
 *
 * The type is also intended to be user-readable, for use in menus.
 *
 * To obtain these objects, use
 * TransformFactory::getAllTransformDescriptions and
 * TransformFactory::getTransformDescription.
 */

struct TransformDescription
{
    enum Type {
        Analysis,    // e.g. vamp plugin output
        Effects,     // e.g. ladspa plugin with audio in and out
        EffectsData, // e.g. control output of ladspa plugin
        Generator,   // e.g. audio out of ladspa plugin with no audio in
        UnknownType
    };

    TransformDescription() : 
        type(UnknownType), configurable(false) { }
    TransformDescription(Type _type, QString _category,
                         TransformId _identifier, QString _name,
                         QString _friendlyName, QString _description,
                         QString _longDescription,
                         QString _maker, QString _units, bool _configurable) :
        type(_type), category(_category),
        identifier(_identifier), name(_name),
        friendlyName(_friendlyName), description(_description),
        longDescription(_longDescription),
        maker(_maker), units(_units), configurable(_configurable) { }

    Type type;
    QString category; // e.g. time > onsets
    TransformId identifier; // e.g. vamp:vamp-aubio:aubioonset
    QString name; // plugin's name if 1 output, else "name: output"
    QString friendlyName; // short text for layer name
    QString description; // sentence describing transform
    QString longDescription; // description "using" plugin name "by" maker
    QString maker;
    QString infoUrl;
    QString units;
    bool configurable;
    
    bool operator<(const TransformDescription &od) const {
        return
            (name <  od.name) ||
            (name == od.name && identifier < od.identifier);
    };
};

typedef std::vector<TransformDescription> TransformList;

#endif