view layer/LayerFactory.cpp @ 1:ab83c415a6cd

* Backed out partially complete changes to make the spectrogram only
store results up to the requested max frequency.  The speed improvement
was minimal at the expense of annoyance when changing frequency limit,
and although it did save memory, it wasn't yet reliable and fixing it
is not a high enough priority.

/* -*- 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
    
    This is experimental software.  Not for distribution.
*/

#include "LayerFactory.h"

#include "WaveformLayer.h"
#include "SpectrogramLayer.h"
#include "TimeRulerLayer.h"
#include "TimeInstantLayer.h"
#include "TimeValueLayer.h"
#include "Colour3DPlotLayer.h"

#include "model/RangeSummarisableTimeValueModel.h"
#include "model/DenseTimeValueModel.h"
#include "model/SparseOneDimensionalModel.h"
#include "model/SparseTimeValueModel.h"
#include "model/DenseThreeDimensionalModel.h"

LayerFactory *
LayerFactory::m_instance = new LayerFactory;

LayerFactory *
LayerFactory::instance()
{
    return m_instance;
}

LayerFactory::~LayerFactory()
{
}

QString
LayerFactory::getLayerPresentationName(LayerType type)
{
    switch (type) {
    case Waveform:     return Layer::tr("Waveform");
    case Spectrogram:  return Layer::tr("Spectrogram");
    case TimeRuler:    return Layer::tr("Ruler");
    case TimeInstants: return Layer::tr("Time Instants");
    case TimeValues:   return Layer::tr("Time Values");
    case Colour3DPlot: return Layer::tr("Colour 3D Plot");

    case MelodicRangeSpectrogram:
	// The user can change all the parameters of this after the
	// fact -- there's nothing permanently melodic-range about it
	// that should be encoded in its name
	return Layer::tr("Spectrogram");
    }

    return Layer::tr("Layer");
}

LayerFactory::LayerTypeSet
LayerFactory::getValidLayerTypes(Model *model)
{
    LayerTypeSet types;

    if (dynamic_cast<DenseThreeDimensionalModel *>(model)) {
	types.insert(Colour3DPlot);
    }

    if (dynamic_cast<DenseTimeValueModel *>(model)) {
	types.insert(Spectrogram);
	types.insert(MelodicRangeSpectrogram);
    }

    if (dynamic_cast<RangeSummarisableTimeValueModel *>(model)) {
	types.insert(Waveform);
    }

    if (dynamic_cast<SparseOneDimensionalModel *>(model)) {
	types.insert(TimeInstants);
    }

    if (dynamic_cast<SparseTimeValueModel *>(model)) {
	types.insert(TimeValues);
    }

    // We don't count TimeRuler here as it doesn't actually display
    // the data, although it can be backed by any model

    return types;
}

LayerFactory::LayerType
LayerFactory::getLayerType(Layer *layer)
{
    if (dynamic_cast<WaveformLayer *>(layer)) return Waveform;
    if (dynamic_cast<SpectrogramLayer *>(layer)) return Spectrogram;
    if (dynamic_cast<TimeRulerLayer *>(layer)) return TimeRuler;
    if (dynamic_cast<TimeInstantLayer *>(layer)) return TimeInstants;
    if (dynamic_cast<TimeValueLayer *>(layer)) return TimeValues;
    if (dynamic_cast<Colour3DPlotLayer *>(layer)) return Colour3DPlot;
    return UnknownLayer;
}

void
LayerFactory::setModel(Layer *layer, Model *model)
{
    if (trySetModel<WaveformLayer, RangeSummarisableTimeValueModel>(layer, model))
	return;

    if (trySetModel<SpectrogramLayer, DenseTimeValueModel>(layer, model))
	return;

    if (trySetModel<TimeRulerLayer, Model>(layer, model))
	return;

    if (trySetModel<TimeInstantLayer, SparseOneDimensionalModel>(layer, model))
	return;

    if (trySetModel<TimeValueLayer, SparseTimeValueModel>(layer, model))
	return;

    if (trySetModel<Colour3DPlotLayer, DenseThreeDimensionalModel>(layer, model))
	return;

    if (trySetModel<SpectrogramLayer, DenseTimeValueModel>(layer, model))
	return;
}

Layer *
LayerFactory::createLayer(LayerType type, View *view,
			  Model *model, int channel)
{
    Layer *layer = 0;

    switch (type) {

    case Waveform:
	layer = new WaveformLayer(view);
	static_cast<WaveformLayer *>(layer)->setChannel(channel);
	break;

    case Spectrogram:
	layer = new SpectrogramLayer(view);
	static_cast<SpectrogramLayer *>(layer)->setChannel(channel);
	break;

    case TimeRuler:
	layer = new TimeRulerLayer(view);
	break;

    case TimeInstants:
	layer = new TimeInstantLayer(view);
	break;

    case TimeValues:
	layer = new TimeValueLayer(view);
	break;

    case Colour3DPlot:
	layer = new Colour3DPlotLayer(view);
	break;

    case MelodicRangeSpectrogram: 
	layer = new SpectrogramLayer(view, SpectrogramLayer::MelodicRange);
	static_cast<SpectrogramLayer *>(layer)->setChannel(channel);
	break;
    }

    if (!layer) {
	std::cerr << "LayerFactory::createLayer: Unknown layer type " 
		  << type << std::endl;
    } else {
	setModel(layer, model);
	std::cerr << "LayerFactory::createLayer: Setting object name "
		  << getLayerPresentationName(type).toStdString() << " on " << layer << std::endl;
	layer->setObjectName(getLayerPresentationName(type));
    }

    return layer;
}