view layer/SpectrogramLayer.cpp @ 590:241929c5d57c sonification

Check the scale width in the View (which has access to it); ask the layer to do something when the user clicks in the scale regardless of the edit mode, and continue with normal processing if the layer has nothing interesting to do

/* -*- 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 2006-2009 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.
*/

#include "SpectrogramLayer.h"

#include "view/View.h"
#include "base/Profiler.h"
#include "base/AudioLevel.h"
#include "base/Window.h"
#include "base/Pitch.h"
#include "base/Preferences.h"
#include "base/RangeMapper.h"
#include "base/LogRange.h"
#include "widgets/CommandHistory.h"
#include "ColourMapper.h"
#include "ImageRegionFinder.h"
#include "data/model/Dense3DModelPeakCache.h"

#include <QPainter>
#include <QImage>
#include <QPixmap>
#include <QRect>
#include <QTimer>
#include <QApplication>
#include <QMessageBox>
#include <QMouseEvent>
#include <QTextStream>

#include <iostream>

using std::cerr;
using std::endl;
#include <cassert>
#include <cmath>

#ifndef __GNUC__
#include <alloca.h>
#endif

//#define DEBUG_SPECTROGRAM_REPAINT 1

SpectrogramLayer::SpectrogramLayer(Configuration config) :
    m_model(0),
    m_channel(0),
    m_windowSize(1024),
    m_windowType(HanningWindow),
    m_windowHopLevel(2),
    m_zeroPadLevel(0),
    m_fftSize(1024),
    m_gain(1.0),
    m_initialGain(1.0),
    m_threshold(0.0),
    m_initialThreshold(0.0),
    m_colourRotation(0),
    m_initialRotation(0),
    m_minFrequency(10),
    m_maxFrequency(8000),
    m_initialMaxFrequency(8000),
    m_colourScale(dBColourScale),
    m_colourMap(0),
    m_frequencyScale(LinearFrequencyScale),
    m_binDisplay(AllBins),
    m_normalizeColumns(false),
    m_normalizeVisibleArea(false),
    m_lastEmittedZoomStep(-1),
    m_synchronous(false),
    m_lastPaintBlockWidth(0),
    m_updateTimer(0),
    m_candidateFillStartFrame(0),
    m_exiting(false),
    m_sliceableModel(0)
{
    if (config == FullRangeDb) {
        m_initialMaxFrequency = 0;
        setMaxFrequency(0);
    } else if (config == MelodicRange) {
	setWindowSize(8192);
	setWindowHopLevel(4);
        m_initialMaxFrequency = 1500;
	setMaxFrequency(1500);
        setMinFrequency(40);
	setColourScale(LinearColourScale);
        setColourMap(ColourMapper::Sunset);
        setFrequencyScale(LogFrequencyScale);
//        setGain(20);
    } else if (config == MelodicPeaks) {
	setWindowSize(4096);
	setWindowHopLevel(5);
        m_initialMaxFrequency = 2000;
	setMaxFrequency(2000);
	setMinFrequency(40);
	setFrequencyScale(LogFrequencyScale);
	setColourScale(LinearColourScale);
	setBinDisplay(PeakFrequencies);
	setNormalizeColumns(true);
    }

    Preferences *prefs = Preferences::getInstance();
    connect(prefs, SIGNAL(propertyChanged(PropertyContainer::PropertyName)),
            this, SLOT(preferenceChanged(PropertyContainer::PropertyName)));
    setWindowType(prefs->getWindowType());

    initialisePalette();
}

SpectrogramLayer::~SpectrogramLayer()
{
    delete m_updateTimer;
    m_updateTimer = 0;
    
    invalidateFFTModels();
}

void
SpectrogramLayer::setModel(const DenseTimeValueModel *model)
{
//    std::cerr << "SpectrogramLayer(" << this << "): setModel(" << model << ")" << std::endl;

    if (model == m_model) return;

    m_model = model;
    invalidateFFTModels();

    if (!m_model || !m_model->isOK()) return;

    connectSignals(m_model);

    connect(m_model, SIGNAL(modelChanged()), this, SLOT(cacheInvalid()));
    connect(m_model, SIGNAL(modelChanged(size_t, size_t)),
	    this, SLOT(cacheInvalid(size_t, size_t)));

    emit modelReplaced();
}

Layer::PropertyList
SpectrogramLayer::getProperties() const
{
    PropertyList list;
    list.push_back("Colour");
    list.push_back("Colour Scale");
    list.push_back("Window Size");
    list.push_back("Window Increment");
    list.push_back("Normalize Columns");
    list.push_back("Normalize Visible Area");
    list.push_back("Bin Display");
    list.push_back("Threshold");
    list.push_back("Gain");
    list.push_back("Colour Rotation");
//    list.push_back("Min Frequency");
//    list.push_back("Max Frequency");
    list.push_back("Frequency Scale");
////    list.push_back("Zero Padding");
    return list;
}

QString
SpectrogramLayer::getPropertyLabel(const PropertyName &name) const
{
    if (name == "Colour") return tr("Colour");
    if (name == "Colour Scale") return tr("Colour Scale");
    if (name == "Window Size") return tr("Window Size");
    if (name == "Window Increment") return tr("Window Overlap");
    if (name == "Normalize Columns") return tr("Normalize Columns");
    if (name == "Normalize Visible Area") return tr("Normalize Visible Area");
    if (name == "Bin Display") return tr("Bin Display");
    if (name == "Threshold") return tr("Threshold");
    if (name == "Gain") return tr("Gain");
    if (name == "Colour Rotation") return tr("Colour Rotation");
    if (name == "Min Frequency") return tr("Min Frequency");
    if (name == "Max Frequency") return tr("Max Frequency");
    if (name == "Frequency Scale") return tr("Frequency Scale");
    if (name == "Zero Padding") return tr("Smoothing");
    return "";
}

QString
SpectrogramLayer::getPropertyIconName(const PropertyName &name) const
{
    if (name == "Normalize Columns") return "normalise-columns";
    if (name == "Normalize Visible Area") return "normalise";
    return "";
}

Layer::PropertyType
SpectrogramLayer::getPropertyType(const PropertyName &name) const
{
    if (name == "Gain") return RangeProperty;
    if (name == "Colour Rotation") return RangeProperty;
    if (name == "Normalize Columns") return ToggleProperty;
    if (name == "Normalize Visible Area") return ToggleProperty;
    if (name == "Threshold") return RangeProperty;
    if (name == "Zero Padding") return ToggleProperty;
    return ValueProperty;
}

QString
SpectrogramLayer::getPropertyGroupName(const PropertyName &name) const
{
    if (name == "Bin Display" ||
        name == "Frequency Scale") return tr("Bins");
    if (name == "Window Size" ||
	name == "Window Increment" ||
        name == "Zero Padding") return tr("Window");
    if (name == "Colour" ||
	name == "Threshold" ||
	name == "Colour Rotation") return tr("Colour");
    if (name == "Normalize Columns" ||
        name == "Normalize Visible Area" ||
        name == "Gain" ||
	name == "Colour Scale") return tr("Scale");
    return QString();
}

int
SpectrogramLayer::getPropertyRangeAndValue(const PropertyName &name,
					   int *min, int *max, int *deflt) const
{
    int val = 0;

    int garbage0, garbage1, garbage2;
    if (!min) min = &garbage0;
    if (!max) max = &garbage1;
    if (!deflt) deflt = &garbage2;

    if (name == "Gain") {

	*min = -50;
	*max = 50;

        *deflt = lrintf(log10(m_initialGain) * 20.0);;
	if (*deflt < *min) *deflt = *min;
	if (*deflt > *max) *deflt = *max;

	val = lrintf(log10(m_gain) * 20.0);
	if (val < *min) val = *min;
	if (val > *max) val = *max;

    } else if (name == "Threshold") {

	*min = -50;
	*max = 0;

        *deflt = lrintf(AudioLevel::multiplier_to_dB(m_initialThreshold));
	if (*deflt < *min) *deflt = *min;
	if (*deflt > *max) *deflt = *max;

	val = lrintf(AudioLevel::multiplier_to_dB(m_threshold));
	if (val < *min) val = *min;
	if (val > *max) val = *max;

    } else if (name == "Colour Rotation") {

	*min = 0;
	*max = 256;
        *deflt = m_initialRotation;

	val = m_colourRotation;

    } else if (name == "Colour Scale") {

	*min = 0;
	*max = 4;
        *deflt = int(dBColourScale);

	val = (int)m_colourScale;

    } else if (name == "Colour") {

	*min = 0;
	*max = ColourMapper::getColourMapCount() - 1;
        *deflt = 0;

	val = m_colourMap;

    } else if (name == "Window Size") {

	*min = 0;
	*max = 10;
        *deflt = 5;
	
	val = 0;
	int ws = m_windowSize;
	while (ws > 32) { ws >>= 1; val ++; }

    } else if (name == "Window Increment") {
	
	*min = 0;
	*max = 5;
        *deflt = 2;

        val = m_windowHopLevel;
    
    } else if (name == "Zero Padding") {
	
	*min = 0;
	*max = 1;
        *deflt = 0;
	
        val = m_zeroPadLevel > 0 ? 1 : 0;
    
    } else if (name == "Min Frequency") {

	*min = 0;
	*max = 9;
        *deflt = 1;

	switch (m_minFrequency) {
	case 0: default: val = 0; break;
	case 10: val = 1; break;
	case 20: val = 2; break;
	case 40: val = 3; break;
	case 100: val = 4; break;
	case 250: val = 5; break;
	case 500: val = 6; break;
	case 1000: val = 7; break;
	case 4000: val = 8; break;
	case 10000: val = 9; break;
	}
    
    } else if (name == "Max Frequency") {

	*min = 0;
	*max = 9;
        *deflt = 6;

	switch (m_maxFrequency) {
	case 500: val = 0; break;
	case 1000: val = 1; break;
	case 1500: val = 2; break;
	case 2000: val = 3; break;
	case 4000: val = 4; break;
	case 6000: val = 5; break;
	case 8000: val = 6; break;
	case 12000: val = 7; break;
	case 16000: val = 8; break;
	default: val = 9; break;
	}

    } else if (name == "Frequency Scale") {

	*min = 0;
	*max = 1;
        *deflt = int(LinearFrequencyScale);
	val = (int)m_frequencyScale;

    } else if (name == "Bin Display") {

	*min = 0;
	*max = 2;
        *deflt = int(AllBins);
	val = (int)m_binDisplay;

    } else if (name == "Normalize Columns") {
	
        *deflt = 0;
	val = (m_normalizeColumns ? 1 : 0);

    } else if (name == "Normalize Visible Area") {
	
        *deflt = 0;
	val = (m_normalizeVisibleArea ? 1 : 0);

    } else {
	val = Layer::getPropertyRangeAndValue(name, min, max, deflt);
    }

    return val;
}

QString
SpectrogramLayer::getPropertyValueLabel(const PropertyName &name,
					int value) const
{
    if (name == "Colour") {
        return ColourMapper::getColourMapName(value);
    }
    if (name == "Colour Scale") {
	switch (value) {
	default:
	case 0: return tr("Linear");
	case 1: return tr("Meter");
	case 2: return tr("dBV^2");
	case 3: return tr("dBV");
	case 4: return tr("Phase");
	}
    }
    if (name == "Window Size") {
	return QString("%1").arg(32 << value);
    }
    if (name == "Window Increment") {
	switch (value) {
	default:
	case 0: return tr("None");
	case 1: return tr("25 %");
	case 2: return tr("50 %");
	case 3: return tr("75 %");
	case 4: return tr("87.5 %");
	case 5: return tr("93.75 %");
	}
    }
    if (name == "Zero Padding") {
        if (value == 0) return tr("None");
        return QString("%1x").arg(value + 1);
    }
    if (name == "Min Frequency") {
	switch (value) {
	default:
	case 0: return tr("No min");
	case 1: return tr("10 Hz");
	case 2: return tr("20 Hz");
	case 3: return tr("40 Hz");
	case 4: return tr("100 Hz");
	case 5: return tr("250 Hz");
	case 6: return tr("500 Hz");
	case 7: return tr("1 KHz");
	case 8: return tr("4 KHz");
	case 9: return tr("10 KHz");
	}
    }
    if (name == "Max Frequency") {
	switch (value) {
	default:
	case 0: return tr("500 Hz");
	case 1: return tr("1 KHz");
	case 2: return tr("1.5 KHz");
	case 3: return tr("2 KHz");
	case 4: return tr("4 KHz");
	case 5: return tr("6 KHz");
	case 6: return tr("8 KHz");
	case 7: return tr("12 KHz");
	case 8: return tr("16 KHz");
	case 9: return tr("No max");
	}
    }
    if (name == "Frequency Scale") {
	switch (value) {
	default:
	case 0: return tr("Linear");
	case 1: return tr("Log");
	}
    }
    if (name == "Bin Display") {
	switch (value) {
	default:
	case 0: return tr("All Bins");
	case 1: return tr("Peak Bins");
	case 2: return tr("Frequencies");
	}
    }
    return tr("<unknown>");
}

RangeMapper *
SpectrogramLayer::getNewPropertyRangeMapper(const PropertyName &name) const
{
    if (name == "Gain") {
        return new LinearRangeMapper(-50, 50, -25, 25, tr("dB"));
    }
    if (name == "Threshold") {
        return new LinearRangeMapper(-50, 0, -50, 0, tr("dB"));
    }
    return 0;
}

void
SpectrogramLayer::setProperty(const PropertyName &name, int value)
{
    if (name == "Gain") {
	setGain(pow(10, float(value)/20.0));
    } else if (name == "Threshold") {
	if (value == -50) setThreshold(0.0);
	else setThreshold(AudioLevel::dB_to_multiplier(value));
    } else if (name == "Colour Rotation") {
	setColourRotation(value);
    } else if (name == "Colour") {
        setColourMap(value);
    } else if (name == "Window Size") {
	setWindowSize(32 << value);
    } else if (name == "Window Increment") {
        setWindowHopLevel(value);
    } else if (name == "Zero Padding") {
        setZeroPadLevel(value > 0.1 ? 3 : 0);
    } else if (name == "Min Frequency") {
	switch (value) {
	default:
	case 0: setMinFrequency(0); break;
	case 1: setMinFrequency(10); break;
	case 2: setMinFrequency(20); break;
	case 3: setMinFrequency(40); break;
	case 4: setMinFrequency(100); break;
	case 5: setMinFrequency(250); break;
	case 6: setMinFrequency(500); break;
	case 7: setMinFrequency(1000); break;
	case 8: setMinFrequency(4000); break;
	case 9: setMinFrequency(10000); break;
	}
        int vs = getCurrentVerticalZoomStep();
        if (vs != m_lastEmittedZoomStep) {
            emit verticalZoomChanged();
            m_lastEmittedZoomStep = vs;
        }
    } else if (name == "Max Frequency") {
	switch (value) {
	case 0: setMaxFrequency(500); break;
	case 1: setMaxFrequency(1000); break;
	case 2: setMaxFrequency(1500); break;
	case 3: setMaxFrequency(2000); break;
	case 4: setMaxFrequency(4000); break;
	case 5: setMaxFrequency(6000); break;
	case 6: setMaxFrequency(8000); break;
	case 7: setMaxFrequency(12000); break;
	case 8: setMaxFrequency(16000); break;
	default:
	case 9: setMaxFrequency(0); break;
	}
        int vs = getCurrentVerticalZoomStep();
        if (vs != m_lastEmittedZoomStep) {
            emit verticalZoomChanged();
            m_lastEmittedZoomStep = vs;
        }
    } else if (name == "Colour Scale") {
	switch (value) {
	default:
	case 0: setColourScale(LinearColourScale); break;
	case 1: setColourScale(MeterColourScale); break;
	case 2: setColourScale(dBSquaredColourScale); break;
	case 3: setColourScale(dBColourScale); break;
	case 4: setColourScale(PhaseColourScale); break;
	}
    } else if (name == "Frequency Scale") {
	switch (value) {
	default:
	case 0: setFrequencyScale(LinearFrequencyScale); break;
	case 1: setFrequencyScale(LogFrequencyScale); break;
	}
    } else if (name == "Bin Display") {
	switch (value) {
	default:
	case 0: setBinDisplay(AllBins); break;
	case 1: setBinDisplay(PeakBins); break;
	case 2: setBinDisplay(PeakFrequencies); break;
	}
    } else if (name == "Normalize Columns") {
	setNormalizeColumns(value ? true : false);
    } else if (name == "Normalize Visible Area") {
	setNormalizeVisibleArea(value ? true : false);
    }
}

void
SpectrogramLayer::invalidateImageCaches()
{
    for (ViewImageCache::iterator i = m_imageCaches.begin();
         i != m_imageCaches.end(); ++i) {
        i->second.validArea = QRect();
    }
}

void
SpectrogramLayer::invalidateImageCaches(size_t startFrame, size_t endFrame)
{
    for (ViewImageCache::iterator i = m_imageCaches.begin();
         i != m_imageCaches.end(); ++i) {

        //!!! when are views removed from the map? on setLayerDormant?
        const View *v = i->first;

#ifdef DEBUG_SPECTROGRAM_REPAINT
        SVDEBUG << "SpectrogramLayer::invalidateImageCaches(" 
                  << startFrame << ", " << endFrame << "): view range is "
                  << v->getStartFrame() << ", " << v->getEndFrame()
                  << endl;

        std::cerr << "Valid area was: " << i->second.validArea.x() << ", "
                  << i->second.validArea.y() << " "
                  << i->second.validArea.width() << "x"
                  << i->second.validArea.height() << std::endl;
#endif

        if (long(startFrame) > v->getStartFrame()) {
            if (startFrame >= v->getEndFrame()) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                std::cerr << "Modified start frame is off right of view" << std::endl;
#endif
                return;
            }
            int x = v->getXForFrame(startFrame);
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "clipping from 0 to " << x-1 << endl;
#endif
            if (x > 1) {
                i->second.validArea &=
                    QRect(0, 0, x-1, v->height());
            } else {
                i->second.validArea = QRect();
            }
        } else {
            if (long(endFrame) < v->getStartFrame()) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                std::cerr << "Modified end frame is off left of view" << std::endl;
#endif
                return;
            }
            int x = v->getXForFrame(endFrame);
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "clipping from " << x+1 << " to " << v->width()
                      << endl;
#endif
            if (x < v->width()) {
                i->second.validArea &=
                    QRect(x+1, 0, v->width()-(x+1), v->height());
            } else {
                i->second.validArea = QRect();
            }
        }

#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "Valid area is now: " << i->second.validArea.x() << ", "
                  << i->second.validArea.y() << " "
                  << i->second.validArea.width() << "x"
                  << i->second.validArea.height() << std::endl;
#endif
    }
}

void
SpectrogramLayer::preferenceChanged(PropertyContainer::PropertyName name)
{
    SVDEBUG << "SpectrogramLayer::preferenceChanged(" << name << ")" << endl;

    if (name == "Window Type") {
        setWindowType(Preferences::getInstance()->getWindowType());
        return;
    }
    if (name == "Spectrogram Y Smoothing") {
        invalidateImageCaches();
        invalidateMagnitudes();
        emit layerParametersChanged();
    }
    if (name == "Spectrogram X Smoothing") {
        invalidateImageCaches();
        invalidateMagnitudes();
        emit layerParametersChanged();
    }
    if (name == "Tuning Frequency") {
        emit layerParametersChanged();
    }
}

void
SpectrogramLayer::setChannel(int ch)
{
    if (m_channel == ch) return;

    invalidateImageCaches();
    m_channel = ch;
    invalidateFFTModels();

    emit layerParametersChanged();
}

int
SpectrogramLayer::getChannel() const
{
    return m_channel;
}

void
SpectrogramLayer::setWindowSize(size_t ws)
{
    if (m_windowSize == ws) return;

    invalidateImageCaches();
    
    m_windowSize = ws;
    m_fftSize = ws * (m_zeroPadLevel + 1);
    
    invalidateFFTModels();

    emit layerParametersChanged();
}

size_t
SpectrogramLayer::getWindowSize() const
{
    return m_windowSize;
}

void
SpectrogramLayer::setWindowHopLevel(size_t v)
{
    if (m_windowHopLevel == v) return;

    invalidateImageCaches();
    
    m_windowHopLevel = v;
    
    invalidateFFTModels();

    emit layerParametersChanged();

//    fillCache();
}

size_t
SpectrogramLayer::getWindowHopLevel() const
{
    return m_windowHopLevel;
}

void
SpectrogramLayer::setZeroPadLevel(size_t v)
{
    if (m_zeroPadLevel == v) return;

    invalidateImageCaches();
    
    m_zeroPadLevel = v;
    m_fftSize = m_windowSize * (v + 1);

    invalidateFFTModels();

    emit layerParametersChanged();
}

size_t
SpectrogramLayer::getZeroPadLevel() const
{
    return m_zeroPadLevel;
}

void
SpectrogramLayer::setWindowType(WindowType w)
{
    if (m_windowType == w) return;

    invalidateImageCaches();
    
    m_windowType = w;

    invalidateFFTModels();

    emit layerParametersChanged();
}

WindowType
SpectrogramLayer::getWindowType() const
{
    return m_windowType;
}

void
SpectrogramLayer::setGain(float gain)
{
//    SVDEBUG << "SpectrogramLayer::setGain(" << gain << ") (my gain is now "
//	      << m_gain << ")" << endl;

    if (m_gain == gain) return;

    invalidateImageCaches();
    
    m_gain = gain;
    
    emit layerParametersChanged();
}

float
SpectrogramLayer::getGain() const
{
    return m_gain;
}

void
SpectrogramLayer::setThreshold(float threshold)
{
    if (m_threshold == threshold) return;

    invalidateImageCaches();
    
    m_threshold = threshold;

    emit layerParametersChanged();
}

float
SpectrogramLayer::getThreshold() const
{
    return m_threshold;
}

void
SpectrogramLayer::setMinFrequency(size_t mf)
{
    if (m_minFrequency == mf) return;

//    SVDEBUG << "SpectrogramLayer::setMinFrequency: " << mf << endl;

    invalidateImageCaches();
    invalidateMagnitudes();
    
    m_minFrequency = mf;

    emit layerParametersChanged();
}

size_t
SpectrogramLayer::getMinFrequency() const
{
    return m_minFrequency;
}

void
SpectrogramLayer::setMaxFrequency(size_t mf)
{
    if (m_maxFrequency == mf) return;

//    SVDEBUG << "SpectrogramLayer::setMaxFrequency: " << mf << endl;

    invalidateImageCaches();
    invalidateMagnitudes();
    
    m_maxFrequency = mf;
    
    emit layerParametersChanged();
}

size_t
SpectrogramLayer::getMaxFrequency() const
{
    return m_maxFrequency;
}

void
SpectrogramLayer::setColourRotation(int r)
{
    invalidateImageCaches();

    if (r < 0) r = 0;
    if (r > 256) r = 256;
    int distance = r - m_colourRotation;

    if (distance != 0) {
	rotatePalette(-distance);
	m_colourRotation = r;
    }
    
    emit layerParametersChanged();
}

void
SpectrogramLayer::setColourScale(ColourScale colourScale)
{
    if (m_colourScale == colourScale) return;

    invalidateImageCaches();
    
    m_colourScale = colourScale;
    
    emit layerParametersChanged();
}

SpectrogramLayer::ColourScale
SpectrogramLayer::getColourScale() const
{
    return m_colourScale;
}

void
SpectrogramLayer::setColourMap(int map)
{
    if (m_colourMap == map) return;

    invalidateImageCaches();
    
    m_colourMap = map;
    initialisePalette();

    emit layerParametersChanged();
}

int
SpectrogramLayer::getColourMap() const
{
    return m_colourMap;
}

void
SpectrogramLayer::setFrequencyScale(FrequencyScale frequencyScale)
{
    if (m_frequencyScale == frequencyScale) return;

    invalidateImageCaches();
    m_frequencyScale = frequencyScale;

    emit layerParametersChanged();
}

SpectrogramLayer::FrequencyScale
SpectrogramLayer::getFrequencyScale() const
{
    return m_frequencyScale;
}

void
SpectrogramLayer::setBinDisplay(BinDisplay binDisplay)
{
    if (m_binDisplay == binDisplay) return;

    invalidateImageCaches();
    m_binDisplay = binDisplay;

    emit layerParametersChanged();
}

SpectrogramLayer::BinDisplay
SpectrogramLayer::getBinDisplay() const
{
    return m_binDisplay;
}

void
SpectrogramLayer::setNormalizeColumns(bool n)
{
    if (m_normalizeColumns == n) return;

    invalidateImageCaches();
    invalidateMagnitudes();
    m_normalizeColumns = n;

    emit layerParametersChanged();
}

bool
SpectrogramLayer::getNormalizeColumns() const
{
    return m_normalizeColumns;
}

void
SpectrogramLayer::setNormalizeVisibleArea(bool n)
{
    SVDEBUG << "SpectrogramLayer::setNormalizeVisibleArea(" << n
              << ") (from " << m_normalizeVisibleArea << ")" << endl;

    if (m_normalizeVisibleArea == n) return;

    invalidateImageCaches();
    invalidateMagnitudes();
    m_normalizeVisibleArea = n;

    emit layerParametersChanged();
}

bool
SpectrogramLayer::getNormalizeVisibleArea() const
{
    return m_normalizeVisibleArea;
}

void
SpectrogramLayer::setLayerDormant(const View *v, bool dormant)
{
    if (dormant) {

#ifdef DEBUG_SPECTROGRAM_REPAINT
        SVDEBUG << "SpectrogramLayer::setLayerDormant(" << dormant << ")"
                  << endl;
#endif

        if (isLayerDormant(v)) {
            return;
        }

        Layer::setLayerDormant(v, true);

	invalidateImageCaches();
        m_imageCaches.erase(v);

        if (m_fftModels.find(v) != m_fftModels.end()) {

            if (m_sliceableModel == m_fftModels[v].first) {
                bool replaced = false;
                for (ViewFFTMap::iterator i = m_fftModels.begin();
                     i != m_fftModels.end(); ++i) {
                    if (i->second.first != m_sliceableModel) {
                        emit sliceableModelReplaced(m_sliceableModel, i->second.first);
                        replaced = true;
                        break;
                    }
                }
                if (!replaced) emit sliceableModelReplaced(m_sliceableModel, 0);
            }

            delete m_fftModels[v].first;
            m_fftModels.erase(v);

            delete m_peakCaches[v];
            m_peakCaches.erase(v);
        }
	
    } else {

        Layer::setLayerDormant(v, false);
    }
}

void
SpectrogramLayer::cacheInvalid()
{
#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::cacheInvalid()" << endl;
#endif

    invalidateImageCaches();
    invalidateMagnitudes();
}

void
SpectrogramLayer::cacheInvalid(size_t from, size_t to)
{
#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::cacheInvalid(" << from << ", " << to << ")" << endl;
#endif

    invalidateImageCaches(from, to);
    invalidateMagnitudes();
}

void
SpectrogramLayer::fillTimerTimedOut()
{
    if (!m_model) return;

    bool allDone = true;

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::fillTimerTimedOut: have " << m_fftModels.size() << " FFT models associated with views" << endl;
#endif

    for (ViewFFTMap::iterator i = m_fftModels.begin();
         i != m_fftModels.end(); ++i) {

        const FFTModel *model = i->second.first;
        size_t lastFill = i->second.second;

        if (model) {

            size_t fill = model->getFillExtent();

#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "SpectrogramLayer::fillTimerTimedOut: extent for " << model << ": " << fill << ", last " << lastFill << ", total " << m_model->getEndFrame() << endl;
#endif

            if (fill >= lastFill) {
                if (fill >= m_model->getEndFrame() && lastFill > 0) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "complete!" << std::endl;
#endif
                    invalidateImageCaches();
                    i->second.second = -1;
                    emit modelChanged();

                } else if (fill > lastFill) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "SpectrogramLayer: emitting modelChanged("
                              << lastFill << "," << fill << ")" << std::endl;
#endif
                    invalidateImageCaches(lastFill, fill);
                    i->second.second = fill;
                    emit modelChanged(lastFill, fill);
                }
            } else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                std::cerr << "SpectrogramLayer: going backwards, emitting modelChanged("
                          << m_model->getStartFrame() << "," << m_model->getEndFrame() << ")" << std::endl;
#endif
                invalidateImageCaches();
                i->second.second = fill;
                emit modelChanged(m_model->getStartFrame(), m_model->getEndFrame());
            }

            if (i->second.second >= 0) {
                allDone = false;
            }
        }
    }

    if (allDone) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "SpectrogramLayer: all complete!" << std::endl;
#endif
        delete m_updateTimer;
        m_updateTimer = 0;
    }
}

bool
SpectrogramLayer::hasLightBackground() const 
{
    return ColourMapper(m_colourMap, 1.f, 255.f).hasLightBackground();
}

void
SpectrogramLayer::initialisePalette()
{
    int formerRotation = m_colourRotation;

    if (m_colourMap == (int)ColourMapper::BlackOnWhite) {
	m_palette.setColour(NO_VALUE, Qt::white);
    } else {
	m_palette.setColour(NO_VALUE, Qt::black);
    }

    ColourMapper mapper(m_colourMap, 1.f, 255.f);
    
    for (int pixel = 1; pixel < 256; ++pixel) {
        m_palette.setColour(pixel, mapper.map(pixel));
    }

    m_crosshairColour = mapper.getContrastingColour();

    m_colourRotation = 0;
    rotatePalette(m_colourRotation - formerRotation);
    m_colourRotation = formerRotation;

    m_drawBuffer = QImage();
}

void
SpectrogramLayer::rotatePalette(int distance)
{
    QColor newPixels[256];

    newPixels[NO_VALUE] = m_palette.getColour(NO_VALUE);

    for (int pixel = 1; pixel < 256; ++pixel) {
	int target = pixel + distance;
	while (target < 1) target += 255;
	while (target > 255) target -= 255;
	newPixels[target] = m_palette.getColour(pixel);
    }

    for (int pixel = 0; pixel < 256; ++pixel) {
	m_palette.setColour(pixel, newPixels[pixel]);
    }

    m_drawBuffer = QImage();
}

unsigned char
SpectrogramLayer::getDisplayValue(View *v, float input) const
{
    int value;

    float min = 0.f;
    float max = 1.f;

    if (m_normalizeVisibleArea) {
        min = m_viewMags[v].getMin();
        max = m_viewMags[v].getMax();
    } else if (!m_normalizeColumns) {
        if (m_colourScale == LinearColourScale //||
//            m_colourScale == MeterColourScale) {
            ) {
            max = 0.1f;
        }
    }

    float thresh = -80.f;

    if (max == 0.f) max = 1.f;
    if (max == min) min = max - 0.0001f;

    switch (m_colourScale) {
	
    default:
    case LinearColourScale:
        value = int(((input - min) / (max - min)) * 255.f) + 1;
	break;
	
    case MeterColourScale:
        value = AudioLevel::multiplier_to_preview
            ((input - min) / (max - min), 254) + 1;
	break;

    case dBSquaredColourScale:
        input = ((input - min) * (input - min)) / ((max - min) * (max - min));
        if (input > 0.f) {
            input = 10.f * log10f(input);
        } else {
            input = thresh;
        }
        if (min > 0.f) {
            thresh = 10.f * log10f(min * min);
            if (thresh < -80.f) thresh = -80.f;
        }
	input = (input - thresh) / (-thresh);
	if (input < 0.f) input = 0.f;
	if (input > 1.f) input = 1.f;
	value = int(input * 255.f) + 1;
	break;
	
    case dBColourScale:
        //!!! experiment with normalizing the visible area this way.
        //In any case, we need to have some indication of what the dB
        //scale is relative to.
        input = (input - min) / (max - min);
        if (input > 0.f) {
            input = 10.f * log10f(input);
        } else {
            input = thresh;
        }
        if (min > 0.f) {
            thresh = 10.f * log10f(min);
            if (thresh < -80.f) thresh = -80.f;
        }
	input = (input - thresh) / (-thresh);
	if (input < 0.f) input = 0.f;
	if (input > 1.f) input = 1.f;
	value = int(input * 255.f) + 1;
	break;
	
    case PhaseColourScale:
	value = int((input * 127.0 / M_PI) + 128);
	break;
    }

    if (value > UCHAR_MAX) value = UCHAR_MAX;
    if (value < 0) value = 0;
    return value;
}

float
SpectrogramLayer::getInputForDisplayValue(unsigned char uc) const
{
    //!!! unused

    int value = uc;
    float input;

    //!!! incorrect for normalizing visible area (and also out of date)
    
    switch (m_colourScale) {
	
    default:
    case LinearColourScale:
	input = float(value - 1) / 255.0 / (m_normalizeColumns ? 1 : 50);
	break;
    
    case MeterColourScale:
	input = AudioLevel::preview_to_multiplier(value - 1, 255)
	    / (m_normalizeColumns ? 1.0 : 50.0);
	break;

    case dBSquaredColourScale:
	input = float(value - 1) / 255.0;
	input = (input * 80.0) - 80.0;
	input = powf(10.0, input) / 20.0;
	value = int(input);
	break;

    case dBColourScale:
	input = float(value - 1) / 255.0;
	input = (input * 80.0) - 80.0;
	input = powf(10.0, input) / 20.0;
	value = int(input);
	break;

    case PhaseColourScale:
	input = float(value - 128) * M_PI / 127.0;
	break;
    }

    return input;
}

float
SpectrogramLayer::getEffectiveMinFrequency() const
{
    int sr = m_model->getSampleRate();
    float minf = float(sr) / m_fftSize;

    if (m_minFrequency > 0.0) {
	size_t minbin = size_t((double(m_minFrequency) * m_fftSize) / sr + 0.01);
	if (minbin < 1) minbin = 1;
	minf = minbin * sr / m_fftSize;
    }

    return minf;
}

float
SpectrogramLayer::getEffectiveMaxFrequency() const
{
    int sr = m_model->getSampleRate();
    float maxf = float(sr) / 2;

    if (m_maxFrequency > 0.0) {
	size_t maxbin = size_t((double(m_maxFrequency) * m_fftSize) / sr + 0.1);
	if (maxbin > m_fftSize / 2) maxbin = m_fftSize / 2;
	maxf = maxbin * sr / m_fftSize;
    }

    return maxf;
}

bool
SpectrogramLayer::getYBinRange(View *v, int y, float &q0, float &q1) const
{
    Profiler profiler("SpectrogramLayer::getYBinRange");
    
    int h = v->height();
    if (y < 0 || y >= h) return false;

    int sr = m_model->getSampleRate();
    float minf = getEffectiveMinFrequency();
    float maxf = getEffectiveMaxFrequency();

    bool logarithmic = (m_frequencyScale == LogFrequencyScale);

    q0 = v->getFrequencyForY(y, minf, maxf, logarithmic);
    q1 = v->getFrequencyForY(y - 1, minf, maxf, logarithmic);

    // Now map these on to ("proportions of") actual bins, using raw
    // FFT size (unsmoothed)

    q0 = (q0 * m_fftSize) / sr;
    q1 = (q1 * m_fftSize) / sr;

    return true;
}

bool
SpectrogramLayer::getSmoothedYBinRange(View *v, int y, float &q0, float &q1) const
{
    Profiler profiler("SpectrogramLayer::getSmoothedYBinRange");

    int h = v->height();
    if (y < 0 || y >= h) return false;

    int sr = m_model->getSampleRate();
    float minf = getEffectiveMinFrequency();
    float maxf = getEffectiveMaxFrequency();

    bool logarithmic = (m_frequencyScale == LogFrequencyScale);

    q0 = v->getFrequencyForY(y, minf, maxf, logarithmic);
    q1 = v->getFrequencyForY(y - 1, minf, maxf, logarithmic);

    // Now map these on to ("proportions of") actual bins, using raw
    // FFT size (unsmoothed)

    q0 = (q0 * getFFTSize(v)) / sr;
    q1 = (q1 * getFFTSize(v)) / sr;

    return true;
}
    
bool
SpectrogramLayer::getXBinRange(View *v, int x, float &s0, float &s1) const
{
    size_t modelStart = m_model->getStartFrame();
    size_t modelEnd = m_model->getEndFrame();

    // Each pixel column covers an exact range of sample frames:
    int f0 = v->getFrameForX(x) - modelStart;
    int f1 = v->getFrameForX(x + 1) - modelStart - 1;

    if (f1 < int(modelStart) || f0 > int(modelEnd)) {
	return false;
    }
      
    // And that range may be drawn from a possibly non-integral
    // range of spectrogram windows:

    size_t windowIncrement = getWindowIncrement();
    s0 = float(f0) / windowIncrement;
    s1 = float(f1) / windowIncrement;

    return true;
}
 
bool
SpectrogramLayer::getXBinSourceRange(View *v, int x, RealTime &min, RealTime &max) const
{
    float s0 = 0, s1 = 0;
    if (!getXBinRange(v, x, s0, s1)) return false;
    
    int s0i = int(s0 + 0.001);
    int s1i = int(s1);

    int windowIncrement = getWindowIncrement();
    int w0 = s0i * windowIncrement - (m_windowSize - windowIncrement)/2;
    int w1 = s1i * windowIncrement + windowIncrement +
	(m_windowSize - windowIncrement)/2 - 1;
    
    min = RealTime::frame2RealTime(w0, m_model->getSampleRate());
    max = RealTime::frame2RealTime(w1, m_model->getSampleRate());
    return true;
}

bool
SpectrogramLayer::getYBinSourceRange(View *v, int y, float &freqMin, float &freqMax)
const
{
    float q0 = 0, q1 = 0;
    if (!getYBinRange(v, y, q0, q1)) return false;

    int q0i = int(q0 + 0.001);
    int q1i = int(q1);

    int sr = m_model->getSampleRate();

    for (int q = q0i; q <= q1i; ++q) {
	if (q == q0i) freqMin = (sr * q) / m_fftSize;
	if (q == q1i) freqMax = (sr * (q+1)) / m_fftSize;
    }
    return true;
}

bool
SpectrogramLayer::getAdjustedYBinSourceRange(View *v, int x, int y,
					     float &freqMin, float &freqMax,
					     float &adjFreqMin, float &adjFreqMax)
const
{
    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
	return false;
    }

    FFTModel *fft = getFFTModel(v);
    if (!fft) return false;

    float s0 = 0, s1 = 0;
    if (!getXBinRange(v, x, s0, s1)) return false;

    float q0 = 0, q1 = 0;
    if (!getYBinRange(v, y, q0, q1)) return false;

    int s0i = int(s0 + 0.001);
    int s1i = int(s1);

    int q0i = int(q0 + 0.001);
    int q1i = int(q1);

    int sr = m_model->getSampleRate();

    size_t windowSize = m_windowSize;
    size_t windowIncrement = getWindowIncrement();

    bool haveAdj = false;

    bool peaksOnly = (m_binDisplay == PeakBins ||
		      m_binDisplay == PeakFrequencies);

    for (int q = q0i; q <= q1i; ++q) {

	for (int s = s0i; s <= s1i; ++s) {

            if (!fft->isColumnAvailable(s)) continue;

	    float binfreq = (sr * q) / m_windowSize;
	    if (q == q0i) freqMin = binfreq;
	    if (q == q1i) freqMax = binfreq;

	    if (peaksOnly && !fft->isLocalPeak(s, q)) continue;

	    if (!fft->isOverThreshold(s, q, m_threshold * (m_fftSize/2))) continue;

	    float freq = binfreq;
	    bool steady = false;
	    
	    if (s < int(fft->getWidth()) - 1) {

                fft->estimateStableFrequency(s, q, freq);
	    
		if (!haveAdj || freq < adjFreqMin) adjFreqMin = freq;
		if (!haveAdj || freq > adjFreqMax) adjFreqMax = freq;

		haveAdj = true;
	    }
	}
    }

    if (!haveAdj) {
	adjFreqMin = adjFreqMax = 0.0;
    }

    return haveAdj;
}
    
bool
SpectrogramLayer::getXYBinSourceRange(View *v, int x, int y,
				      float &min, float &max,
				      float &phaseMin, float &phaseMax) const
{
    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
	return false;
    }

    float q0 = 0, q1 = 0;
    if (!getYBinRange(v, y, q0, q1)) return false;

    float s0 = 0, s1 = 0;
    if (!getXBinRange(v, x, s0, s1)) return false;
    
    int q0i = int(q0 + 0.001);
    int q1i = int(q1);

    int s0i = int(s0 + 0.001);
    int s1i = int(s1);

    bool rv = false;

    size_t zp = getZeroPadLevel(v);
    q0i *= zp + 1;
    q1i *= zp + 1;

    FFTModel *fft = getFFTModel(v);

    if (fft) {

        int cw = fft->getWidth();
        int ch = fft->getHeight();

        min = 0.0;
        max = 0.0;
        phaseMin = 0.0;
        phaseMax = 0.0;
        bool have = false;

        for (int q = q0i; q <= q1i; ++q) {
            for (int s = s0i; s <= s1i; ++s) {
                if (s >= 0 && q >= 0 && s < cw && q < ch) {

                    if (!fft->isColumnAvailable(s)) continue;
                    
                    float value;

                    value = fft->getPhaseAt(s, q);
                    if (!have || value < phaseMin) { phaseMin = value; }
                    if (!have || value > phaseMax) { phaseMax = value; }

                    value = fft->getMagnitudeAt(s, q) / (m_fftSize/2);
                    if (!have || value < min) { min = value; }
                    if (!have || value > max) { max = value; }
                    
                    have = true;
                }	
            }
        }
        
        if (have) {
            rv = true;
        }
    }

    return rv;
}
   
size_t
SpectrogramLayer::getZeroPadLevel(const View *v) const
{
    //!!! tidy all this stuff

    if (m_binDisplay != AllBins) return 0;

    Preferences::SpectrogramSmoothing smoothing = 
        Preferences::getInstance()->getSpectrogramSmoothing();
    
    if (smoothing == Preferences::NoSpectrogramSmoothing ||
        smoothing == Preferences::SpectrogramInterpolated) return 0;

    if (m_frequencyScale == LogFrequencyScale) return 3;

    int sr = m_model->getSampleRate();
    
    size_t maxbin = m_fftSize / 2;
    if (m_maxFrequency > 0) {
	maxbin = int((double(m_maxFrequency) * m_fftSize) / sr + 0.1);
	if (maxbin > m_fftSize / 2) maxbin = m_fftSize / 2;
    }

    size_t minbin = 1;
    if (m_minFrequency > 0) {
	minbin = int((double(m_minFrequency) * m_fftSize) / sr + 0.1);
	if (minbin < 1) minbin = 1;
	if (minbin >= maxbin) minbin = maxbin - 1;
    }

    float perPixel =
        float(v->height()) /
        float((maxbin - minbin) / (m_zeroPadLevel + 1));

    if (perPixel > 2.8) {
        return 3; // 4x oversampling
    } else if (perPixel > 1.5) {
        return 1; // 2x
    } else {
        return 0; // 1x
    }
}

size_t
SpectrogramLayer::getFFTSize(const View *v) const
{
    return m_fftSize * (getZeroPadLevel(v) + 1);
}
	
FFTModel *
SpectrogramLayer::getFFTModel(const View *v) const
{
    if (!m_model) return 0;

    size_t fftSize = getFFTSize(v);

    if (m_fftModels.find(v) != m_fftModels.end()) {
        if (m_fftModels[v].first == 0) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "SpectrogramLayer::getFFTModel(" << v << "): Found null model" << endl;
#endif
            return 0;
        }
        if (m_fftModels[v].first->getHeight() != fftSize / 2 + 1) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "SpectrogramLayer::getFFTModel(" << v << "): Found a model with the wrong height (" << m_fftModels[v].first->getHeight() << ", wanted " << (fftSize / 2 + 1) << ")" << endl;
#endif
            delete m_fftModels[v].first;
            m_fftModels.erase(v);
            delete m_peakCaches[v];
            m_peakCaches.erase(v);
        } else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "SpectrogramLayer::getFFTModel(" << v << "): Found a good model of height " << m_fftModels[v].first->getHeight() << endl;
#endif
            return m_fftModels[v].first;
        }
    }

    if (m_fftModels.find(v) == m_fftModels.end()) {

        FFTModel *model = new FFTModel(m_model,
                                       m_channel,
                                       m_windowType,
                                       m_windowSize,
                                       getWindowIncrement(),
                                       fftSize,
                                       true, // polar
                                       StorageAdviser::SpeedCritical,
                                       m_candidateFillStartFrame);

        if (!model->isOK()) {
            QMessageBox::critical
                (0, tr("FFT cache failed"),
                 tr("Failed to create the FFT model for this spectrogram.\n"
                    "There may be insufficient memory or disc space to continue."));
            delete model;
            m_fftModels[v] = FFTFillPair(0, 0);
            return 0;
        }

        if (!m_sliceableModel) {
#ifdef DEBUG_SPECTROGRAM
            std::cerr << "SpectrogramLayer: emitting sliceableModelReplaced(0, " << model << ")" << std::endl;
#endif
            ((SpectrogramLayer *)this)->sliceableModelReplaced(0, model);
            m_sliceableModel = model;
        }

        m_fftModels[v] = FFTFillPair(model, 0);

        model->resume();
        
        delete m_updateTimer;
        m_updateTimer = new QTimer((SpectrogramLayer *)this);
        connect(m_updateTimer, SIGNAL(timeout()),
                this, SLOT(fillTimerTimedOut()));
        m_updateTimer->start(200);
    }

    return m_fftModels[v].first;
}

Dense3DModelPeakCache *
SpectrogramLayer::getPeakCache(const View *v) const
{
    if (!m_peakCaches[v]) {
        FFTModel *f = getFFTModel(v);
        if (!f) return 0;
        m_peakCaches[v] = new Dense3DModelPeakCache(f, 8);
    }
    return m_peakCaches[v];
}

const Model *
SpectrogramLayer::getSliceableModel() const
{
    if (m_sliceableModel) return m_sliceableModel;
    if (m_fftModels.empty()) return 0;
    m_sliceableModel = m_fftModels.begin()->second.first;
    return m_sliceableModel;
}

void
SpectrogramLayer::invalidateFFTModels()
{
    for (ViewFFTMap::iterator i = m_fftModels.begin();
         i != m_fftModels.end(); ++i) {
        delete i->second.first;
    }
    for (PeakCacheMap::iterator i = m_peakCaches.begin();
         i != m_peakCaches.end(); ++i) {
        delete i->second;
    }
    
    m_fftModels.clear();
    m_peakCaches.clear();

    if (m_sliceableModel) {
        std::cerr << "SpectrogramLayer: emitting sliceableModelReplaced(" << m_sliceableModel << ", 0)" << std::endl;
        emit sliceableModelReplaced(m_sliceableModel, 0);
        m_sliceableModel = 0;
    }
}

void
SpectrogramLayer::invalidateMagnitudes()
{
    m_viewMags.clear();
    for (std::vector<MagnitudeRange>::iterator i = m_columnMags.begin();
         i != m_columnMags.end(); ++i) {
        *i = MagnitudeRange();
    }
}

bool
SpectrogramLayer::updateViewMagnitudes(View *v) const
{
    MagnitudeRange mag;

    int x0 = 0, x1 = v->width();
    float s00 = 0, s01 = 0, s10 = 0, s11 = 0;
    
    if (!getXBinRange(v, x0, s00, s01)) {
        s00 = s01 = m_model->getStartFrame() / getWindowIncrement();
    }

    if (!getXBinRange(v, x1, s10, s11)) {
        s10 = s11 = m_model->getEndFrame() / getWindowIncrement();
    }

    int s0 = int(std::min(s00, s10) + 0.0001);
    int s1 = int(std::max(s01, s11) + 0.0001);

//    SVDEBUG << "SpectrogramLayer::updateViewMagnitudes: x0 = " << x0 << ", x1 = " << x1 << ", s00 = " << s00 << ", s11 = " << s11 << " s0 = " << s0 << ", s1 = " << s1 << endl;

    if (int(m_columnMags.size()) <= s1) {
        m_columnMags.resize(s1 + 1);
    }

    for (int s = s0; s <= s1; ++s) {
        if (m_columnMags[s].isSet()) {
            mag.sample(m_columnMags[s]);
        }
    }

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::updateViewMagnitudes returning from cols "
              << s0 << " -> " << s1 << " inclusive" << endl;
#endif

    if (!mag.isSet()) return false;
    if (mag == m_viewMags[v]) return false;
    m_viewMags[v] = mag;
    return true;
}

void
SpectrogramLayer::setSynchronousPainting(bool synchronous)
{
    m_synchronous = synchronous;
}

void
SpectrogramLayer::paint(View *v, QPainter &paint, QRect rect) const
{
    // What a lovely, old-fashioned function this is.
    // It's practically FORTRAN 77 in its clarity and linearity.

    Profiler profiler("SpectrogramLayer::paint", false);

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::paint(): m_model is " << m_model << ", zoom level is " << v->getZoomLevel() << ", m_updateTimer " << m_updateTimer << endl;
    
    std::cerr << "rect is " << rect.x() << "," << rect.y() << " " << rect.width() << "x" << rect.height() << std::endl;
#endif

    long startFrame = v->getStartFrame();
    if (startFrame < 0) m_candidateFillStartFrame = 0;
    else m_candidateFillStartFrame = startFrame;

    if (!m_model || !m_model->isOK() || !m_model->isReady()) {
	return;
    }

    if (isLayerDormant(v)) {
	SVDEBUG << "SpectrogramLayer::paint(): Layer is dormant, making it undormant again" << endl;
    }

    // Need to do this even if !isLayerDormant, as that could mean v
    // is not in the dormancy map at all -- we need it to be present
    // and accountable for when determining whether we need the cache
    // in the cache-fill thread above.
    //!!! no longer use cache-fill thread
    const_cast<SpectrogramLayer *>(this)->Layer::setLayerDormant(v, false);

    size_t fftSize = getFFTSize(v);
/*
    FFTModel *fft = getFFTModel(v);
    if (!fft) {
	std::cerr << "ERROR: SpectrogramLayer::paint(): No FFT model, returning" << std::endl;
	return;
    }
*/
    ImageCache &cache = m_imageCaches[v];

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::paint(): image cache valid area " << cache.

validArea.x() << ", " << cache.validArea.y() << ", " << cache.validArea.width() << "x" << cache.validArea.height() << endl;
#endif

#ifdef DEBUG_SPECTROGRAM_REPAINT
    bool stillCacheing = (m_updateTimer != 0);
    SVDEBUG << "SpectrogramLayer::paint(): Still cacheing = " << stillCacheing << endl;
#endif

    int zoomLevel = v->getZoomLevel();

    int x0 = 0;
    int x1 = v->width();

    bool recreateWholeImageCache = true;

    x0 = rect.left();
    x1 = rect.right() + 1;
/*
    float xPixelRatio = float(fft->getResolution()) / float(zoomLevel);
    std::cerr << "xPixelRatio = " << xPixelRatio << std::endl;
    if (xPixelRatio < 1.f) xPixelRatio = 1.f;
*/
    if (cache.validArea.width() > 0) {

        int cw = cache.image.width();
        int ch = cache.image.height();
        
	if (int(cache.zoomLevel) == zoomLevel &&
	    cw == v->width() &&
	    ch == v->height()) {

	    if (v->getXForFrame(cache.startFrame) ==
		v->getXForFrame(startFrame) &&
                cache.validArea.x() <= x0 &&
                cache.validArea.x() + cache.validArea.width() >= x1) {
	    
#ifdef DEBUG_SPECTROGRAM_REPAINT
		std::cerr << "SpectrogramLayer: image cache good" << std::endl;
#endif

		paint.drawImage(rect, cache.image, rect);
                //!!!
//                paint.drawImage(v->rect(), cache.image,
//                                QRect(QPoint(0, 0), cache.image.size()));

                illuminateLocalFeatures(v, paint);
		return;

	    } else {

#ifdef DEBUG_SPECTROGRAM_REPAINT
		std::cerr << "SpectrogramLayer: image cache partially OK" << std::endl;
#endif

		recreateWholeImageCache = false;

		int dx = v->getXForFrame(cache.startFrame) -
		         v->getXForFrame(startFrame);

#ifdef DEBUG_SPECTROGRAM_REPAINT
		std::cerr << "SpectrogramLayer: dx = " << dx << " (image cache " << cw << "x" << ch << ")" << std::endl;
#endif

		if (dx != 0 &&
                    dx > -cw &&
                    dx <  cw) {
                    
                    int dxp = dx;
                    if (dxp < 0) dxp = -dxp;
                    int copy = (cw - dxp) * sizeof(QRgb);
                    for (int y = 0; y < ch; ++y) {
                        QRgb *line = (QRgb *)cache.image.scanLine(y);
                        if (dx < 0) {
                            memmove(line, line + dxp, copy);
                        } else {
                            memmove(line + dxp, line, copy);
                        }
                    }

                    int px = cache.validArea.x();
                    int pw = cache.validArea.width();

		    if (dx < 0) {
			x0 = cw + dx;
			x1 = cw;
                        px += dx;
                        if (px < 0) {
                            pw += px;
                            px = 0;
                            if (pw < 0) pw = 0;
                        }
		    } else {
			x0 = 0;
			x1 = dx;
                        px += dx;
                        if (px + pw > cw) {
                            pw = int(cw) - px;
                            if (pw < 0) pw = 0;
                        }
		    }
                    
                    cache.validArea =
                        QRect(px, cache.validArea.y(),
                              pw, cache.validArea.height());

#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "valid area now "
                              << px << "," << cache.validArea.y()
                              << " " << pw << "x" << cache.validArea.height()
                              << std::endl;
#endif
/*
		    paint.drawImage(rect & cache.validArea,
                                     cache.image,
                                     rect & cache.validArea);
*/
                } else if (dx != 0) {

                    // we scrolled too far to be of use

#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "dx == " << dx << ": scrolled too far for cache to be useful" << std::endl;
#endif

                    cache.validArea = QRect();
                    recreateWholeImageCache = true;
                }
	    }
	} else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
	    std::cerr << "SpectrogramLayer: image cache useless" << std::endl;
            if (int(cache.zoomLevel) != zoomLevel) {
                std::cerr << "(cache zoomLevel " << cache.zoomLevel
                          << " != " << zoomLevel << ")" << std::endl;
            }
            if (cw != v->width()) {
                std::cerr << "(cache width " << cw
                          << " != " << v->width();
            }
            if (ch != v->height()) {
                std::cerr << "(cache height " << ch
                          << " != " << v->height();
            }
#endif
            cache.validArea = QRect();
//            recreateWholeImageCache = true;
	}
    }

    if (updateViewMagnitudes(v)) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "SpectrogramLayer: magnitude range changed to [" << m_viewMags[v].getMin() << "->" << m_viewMags[v].getMax() << "]" << std::endl;
#endif
        if (m_normalizeVisibleArea) {
            cache.validArea = QRect();
            recreateWholeImageCache = true;
        }
    } else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "No change in magnitude range [" << m_viewMags[v].getMin() << "->" << m_viewMags[v].getMax() << "]" << std::endl;
#endif
    }

    if (recreateWholeImageCache) {
        x0 = 0;
        x1 = v->width();
    }

    struct timeval tv;
    (void)gettimeofday(&tv, 0);
    RealTime mainPaintStart = RealTime::fromTimeval(tv);

    int paintBlockWidth = m_lastPaintBlockWidth;

    if (m_synchronous) {
        if (paintBlockWidth < x1 - x0) {
            // always paint full width
            paintBlockWidth = x1 - x0;
        }
    } else {
        if (paintBlockWidth == 0) {
            paintBlockWidth = (300000 / zoomLevel);
        } else {
            RealTime lastTime = m_lastPaintTime;
            while (lastTime > RealTime::fromMilliseconds(200) &&
                   paintBlockWidth > 50) {
                paintBlockWidth /= 2;
                lastTime = lastTime / 2;
            }
            while (lastTime < RealTime::fromMilliseconds(90) &&
                   paintBlockWidth < 1500) {
                paintBlockWidth *= 2;
                lastTime = lastTime * 2;
            }
        }
        
        if (paintBlockWidth < 20) paintBlockWidth = 20;
    }

#ifdef DEBUG_SPECTROGRAM_REPAINT
    std::cerr << "[" << this << "]: last paint width: " << m_lastPaintBlockWidth << ", last paint time: " << m_lastPaintTime << ", new paint width: " << paintBlockWidth << std::endl;
#endif

    // We always paint the full height when refreshing the cache.
    // Smaller heights can be used when painting direct from cache
    // (further up in this function), but we want to ensure the cache
    // is coherent without having to worry about vertical matching of
    // required and valid areas as well as horizontal.

    int h = v->height();

    if (cache.validArea.width() > 0) {

        // If part of the cache is known to be valid, select a strip
        // immediately to left or right of the valid part

        //!!! this really needs to be coordinated with the selection
        //!!! of m_drawBuffer boundaries in the bufferBinResolution
        //!!! case below

        int vx0 = 0, vx1 = 0;
        vx0 = cache.validArea.x();
        vx1 = cache.validArea.x() + cache.validArea.width();
        
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "x0 " << x0 << ", x1 " << x1 << ", vx0 " << vx0 << ", vx1 " << vx1 << ", paintBlockWidth " << paintBlockWidth << std::endl;
#endif         
        if (x0 < vx0) {
            if (x0 + paintBlockWidth < vx0) {
                x0 = vx0 - paintBlockWidth;
            }
            x1 = vx0;
        } else if (x0 >= vx1) {
            x0 = vx1;
            if (x1 > x0 + paintBlockWidth) {
                x1 = x0 + paintBlockWidth;
            }
        } else {
            // x0 is within the valid area
            if (x1 > vx1) {
                x0 = vx1;
                if (x0 + paintBlockWidth < x1) {
                    x1 = x0 + paintBlockWidth;
                }
            } else {
                x1 = x0; // it's all valid, paint nothing
            }
        }
         
        cache.validArea = QRect
            (std::min(vx0, x0), cache.validArea.y(),
             std::max(vx1 - std::min(vx0, x0),
                       x1 - std::min(vx0, x0)),
             cache.validArea.height());

#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "Valid area becomes " << cache.validArea.x()
                  << ", " << cache.validArea.y() << ", "
                  << cache.validArea.width() << "x"
                  << cache.validArea.height() << std::endl;
#endif
            
    } else {
        if (x1 > x0 + paintBlockWidth) {
            int sfx = x1;
            if (startFrame < 0) sfx = v->getXForFrame(0);
            if (sfx >= x0 && sfx + paintBlockWidth <= x1) {
                x0 = sfx;
                x1 = x0 + paintBlockWidth;
            } else {
                int mid = (x1 + x0) / 2;
                x0 = mid - paintBlockWidth/2;
                x1 = x0 + paintBlockWidth;
            }
        }
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "Valid area becomes " << x0 << ", 0, " << (x1-x0)
                  << "x" << h << std::endl;
#endif
        cache.validArea = QRect(x0, 0, x1 - x0, h);
    }

/*
    if (xPixelRatio != 1.f) {
        x0 = int((int(x0 / xPixelRatio) - 4) * xPixelRatio + 0.0001);
        x1 = int((int(x1 / xPixelRatio) + 4) * xPixelRatio + 0.0001);
    }
*/
    int w = x1 - x0;

#ifdef DEBUG_SPECTROGRAM_REPAINT
    std::cerr << "x0 " << x0 << ", x1 " << x1 << ", w " << w << ", h " << h << std::endl;
#endif

    int sr = m_model->getSampleRate();

    // Set minFreq and maxFreq to the frequency extents of the possibly
    // zero-padded visible bin range, and displayMinFreq and displayMaxFreq
    // to the actual scale frequency extents (presumably not zero padded).

    // If we are zero padding, we want to use the zero-padded
    // equivalents of the bins that we would be using if not zero
    // padded, to avoid spaces at the top and bottom of the display.

    // Note fftSize is the actual zero-padded fft size, m_fftSize the
    // nominal fft size.
    
    size_t maxbin = m_fftSize / 2;
    if (m_maxFrequency > 0) {
	maxbin = int((double(m_maxFrequency) * m_fftSize) / sr + 0.001);
	if (maxbin > m_fftSize / 2) maxbin = m_fftSize / 2;
    }

    size_t minbin = 1;
    if (m_minFrequency > 0) {
	minbin = int((double(m_minFrequency) * m_fftSize) / sr + 0.001);
//        std::cerr << "m_minFrequency = " << m_minFrequency << " -> minbin = " << minbin << std::endl;
	if (minbin < 1) minbin = 1;
	if (minbin >= maxbin) minbin = maxbin - 1;
    }

    int zpl = getZeroPadLevel(v) + 1;
    minbin = minbin * zpl;
    maxbin = (maxbin + 1) * zpl - 1;

    float minFreq = (float(minbin) * sr) / fftSize;
    float maxFreq = (float(maxbin) * sr) / fftSize;

    float displayMinFreq = minFreq;
    float displayMaxFreq = maxFreq;

    if (fftSize != m_fftSize) {
        displayMinFreq = getEffectiveMinFrequency();
        displayMaxFreq = getEffectiveMaxFrequency();
    }

//    std::cerr << "(giving actual minFreq " << minFreq << " and display minFreq " << displayMinFreq << ")" << std::endl;

    int increment = getWindowIncrement();
    
    bool logarithmic = (m_frequencyScale == LogFrequencyScale);
/*
    float yforbin[maxbin - minbin + 1];

    for (size_t q = minbin; q <= maxbin; ++q) {
        float f0 = (float(q) * sr) / fftSize;
        yforbin[q - minbin] =
            v->getYForFrequency(f0, displayMinFreq, displayMaxFreq,
                                logarithmic);
    }
*/
    MagnitudeRange overallMag = m_viewMags[v];
    bool overallMagChanged = false;

    bool fftSuspended = false;

#ifdef DEBUG_SPECTROGRAM_REPAINT
    std::cerr << ((float(v->getFrameForX(1) - v->getFrameForX(0))) / increment) << " bin(s) per pixel" << std::endl;
#endif

    bool runOutOfData = false;

    if (w == 0) {
        SVDEBUG << "*** NOTE: w == 0" << endl;
    }

#ifdef DEBUG_SPECTROGRAM_REPAINT
    size_t pixels = 0;
#endif

    Profiler outerprof("SpectrogramLayer::paint: all cols");

    // The draw buffer contains a fragment at either our pixel
    // resolution (if there is more than one time-bin per pixel) or
    // time-bin resolution (if a time-bin spans more than one pixel).
    // We need to ensure that it starts and ends at points where a
    // time-bin boundary occurs at an exact pixel boundary, and with a
    // certain amount of overlap across existing pixels so that we can
    // scale and draw from it without smoothing errors at the edges.

    // If (getFrameForX(x) / increment) * increment ==
    // getFrameForX(x), then x is a time-bin boundary.  We want two
    // such boundaries at either side of the draw buffer -- one which
    // we draw up to, and one which we subsequently crop at.

    bool bufferBinResolution = false;
    if (increment > zoomLevel) bufferBinResolution = true;

    long leftBoundaryFrame = -1, leftCropFrame = -1;
    long rightBoundaryFrame = -1, rightCropFrame = -1;

    int bufwid;

    if (bufferBinResolution) {

        for (int x = x0; ; --x) {
            long f = v->getFrameForX(x);
            if ((f / increment) * increment == f) {
                if (leftCropFrame == -1) leftCropFrame = f;
                else if (x < x0 - 2) { leftBoundaryFrame = f; break; }
            }
        }
        for (int x = x0 + w; ; ++x) {
            long f = v->getFrameForX(x);
            if ((f / increment) * increment == f) {
                if (rightCropFrame == -1) rightCropFrame = f;
                else if (x > x0 + w + 2) { rightBoundaryFrame = f; break; }
            }
        }
#ifdef DEBUG_SPECTROGRAM_REPAINT
        cerr << "Left: crop: " << leftCropFrame << " (bin " << leftCropFrame/increment << "); boundary: " << leftBoundaryFrame << " (bin " << leftBoundaryFrame/increment << ")" << endl;
        cerr << "Right: crop: " << rightCropFrame << " (bin " << rightCropFrame/increment << "); boundary: " << rightBoundaryFrame << " (bin " << rightBoundaryFrame/increment << ")" << endl;
#endif

        bufwid = (rightBoundaryFrame - leftBoundaryFrame) / increment;

    } else {
        
        bufwid = w;
    }

#ifdef __GNUC__
    int binforx[bufwid];
    float binfory[h];
#else
    int *binforx = (int *)alloca(bufwid * sizeof(int));
    float *binfory = (float *)alloca(h * sizeof(float));
#endif

    bool usePeaksCache = false;

    if (bufferBinResolution) {
        for (int x = 0; x < bufwid; ++x) {
            binforx[x] = (leftBoundaryFrame / increment) + x;
//            cerr << "binforx[" << x << "] = " << binforx[x] << endl;
        }
        m_drawBuffer = QImage(bufwid, h, QImage::Format_Indexed8);
    } else {
        for (int x = 0; x < bufwid; ++x) {
            float s0 = 0, s1 = 0;
            if (getXBinRange(v, x + x0, s0, s1)) {
                binforx[x] = int(s0 + 0.0001);
            } else {
                binforx[x] = -1; //???
            }
        }
        if (m_drawBuffer.width() < bufwid || m_drawBuffer.height() < h) {
            m_drawBuffer = QImage(bufwid, h, QImage::Format_Indexed8);
        }
        usePeaksCache = (increment * 8) < zoomLevel;
        if (m_colourScale == PhaseColourScale) usePeaksCache = false;
    }

    m_drawBuffer.setNumColors(256);
    for (int pixel = 0; pixel < 256; ++pixel) {
        m_drawBuffer.setColor(pixel, m_palette.getColour(pixel).rgb());
    }

    m_drawBuffer.fill(0);
    
    if (m_binDisplay != PeakFrequencies) {

        for (int y = 0; y < h; ++y) {
            float q0 = 0, q1 = 0;
            if (!getSmoothedYBinRange(v, h-y-1, q0, q1)) {
                binfory[y] = -1;
            } else {
                binfory[y] = q0;
//                cerr << "binfory[" << y << "] = " << binfory[y] << endl;
            }
        }

        paintDrawBuffer(v, bufwid, h, binforx, binfory, usePeaksCache,
                        overallMag, overallMagChanged);

    } else {

        paintDrawBufferPeakFrequencies(v, bufwid, h, binforx,
                                       minbin, maxbin,
                                       displayMinFreq, displayMaxFreq,
                                       logarithmic,
                                       overallMag, overallMagChanged);
    }

/*
    for (int x = 0; x < w / xPixelRatio; ++x) {

        Profiler innerprof("SpectrogramLayer::paint: 1 pixel column");

        runOutOfData = !paintColumnValues(v, fft, x0, x,
                                          minbin, maxbin,
                                          displayMinFreq, displayMaxFreq,
                                          xPixelRatio,
                                          h, yforbin);

        if (runOutOfData) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
            std::cerr << "Run out of data -- dropping out of loop" << std::endl;
#endif
            break;
        }
    }
*/
#ifdef DEBUG_SPECTROGRAM_REPAINT
//    std::cerr << pixels << " pixels drawn" << std::endl;
#endif

    if (overallMagChanged) {
        m_viewMags[v] = overallMag;
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "Overall mag is now [" << m_viewMags[v].getMin() << "->" << m_viewMags[v].getMax() << "] - will be updating" << std::endl;
#endif
    } else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        std::cerr << "Overall mag unchanged at [" << m_viewMags[v].getMin() << "->" << m_viewMags[v].getMax() << "]" << std::endl;
#endif
    }

    outerprof.end();

    Profiler profiler2("SpectrogramLayer::paint: draw image");

    if (recreateWholeImageCache) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        SVDEBUG << "Recreating image cache: width = " << v->width()
                  << ", height = " << h << endl;
#endif
	cache.image = QImage(v->width(), h, QImage::Format_ARGB32_Premultiplied);
    }

    if (w > 0) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
        SVDEBUG << "Painting " << w << "x" << h
                  << " from draw buffer at " << 0 << "," << 0
                  << " to " << w << "x" << h << " on cache at "
                  << x0 << "," << 0 << endl;
#endif

        QPainter cachePainter(&cache.image);

        if (bufferBinResolution) {
            int scaledLeft = v->getXForFrame(leftBoundaryFrame);
            int scaledRight = v->getXForFrame(rightBoundaryFrame);
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "Rescaling image from " << bufwid
                 << "x" << h << " to "
                 << scaledRight-scaledLeft << "x" << h << endl;
#endif
            Preferences::SpectrogramXSmoothing xsmoothing = 
                Preferences::getInstance()->getSpectrogramXSmoothing();
//            SVDEBUG << "xsmoothing == " << xsmoothing << endl;
            QImage scaled = m_drawBuffer.scaled
                (scaledRight - scaledLeft, h,
                 Qt::IgnoreAspectRatio,
                 ((xsmoothing == Preferences::SpectrogramXInterpolated) ?
                  Qt::SmoothTransformation : Qt::FastTransformation));
            int scaledLeftCrop = v->getXForFrame(leftCropFrame);
            int scaledRightCrop = v->getXForFrame(rightCropFrame);
#ifdef DEBUG_SPECTROGRAM_REPAINT
            SVDEBUG << "Drawing image region of width " << scaledRightCrop - scaledLeftCrop << " to "
                 << scaledLeftCrop << " from " << scaledLeftCrop - scaledLeft << endl;
#endif
            cachePainter.drawImage
                (QRect(scaledLeftCrop, 0,
                       scaledRightCrop - scaledLeftCrop, h),
                 scaled,
                 QRect(scaledLeftCrop - scaledLeft, 0,
                       scaledRightCrop - scaledLeftCrop, h));
        } else {
            cachePainter.drawImage(QRect(x0, 0, w, h),
                                   m_drawBuffer,
                                   QRect(0, 0, w, h));
        }

        cachePainter.end();
    }

    QRect pr = rect & cache.validArea;

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "Painting " << pr.width() << "x" << pr.height()
              << " from cache at " << pr.x() << "," << pr.y()
              << " to window" << endl;
#endif

    paint.drawImage(pr.x(), pr.y(), cache.image,
                    pr.x(), pr.y(), pr.width(), pr.height());
    //!!!
//    paint.drawImage(v->rect(), cache.image,
//                    QRect(QPoint(0, 0), cache.image.size()));

    cache.startFrame = startFrame;
    cache.zoomLevel = zoomLevel;

    if (!m_synchronous) {

        if (!m_normalizeVisibleArea || !overallMagChanged) {
    
            if (cache.validArea.x() > 0) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                SVDEBUG << "SpectrogramLayer::paint() updating left (0, "
                          << cache.validArea.x() << ")" << endl;
#endif
                v->update(0, 0, cache.validArea.x(), h);
            }
            
            if (cache.validArea.x() + cache.validArea.width() <
                cache.image.width()) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                SVDEBUG << "SpectrogramLayer::paint() updating right ("
                          << cache.validArea.x() + cache.validArea.width()
                          << ", "
                          << cache.image.width() - (cache.validArea.x() +
                                                     cache.validArea.width())
                          << ")" << endl;
#endif
                v->update(cache.validArea.x() + cache.validArea.width(),
                          0,
                          cache.image.width() - (cache.validArea.x() +
                                                  cache.validArea.width()),
                          h);
            }
        } else {
            // overallMagChanged
            std::cerr << "\noverallMagChanged - updating all\n" << std::endl;
            cache.validArea = QRect();
            v->update();
        }
    }

    illuminateLocalFeatures(v, paint);

#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::paint() returning" << endl;
#endif

    if (!m_synchronous) {
        m_lastPaintBlockWidth = paintBlockWidth;
        (void)gettimeofday(&tv, 0);
        m_lastPaintTime = RealTime::fromTimeval(tv) - mainPaintStart;
    }

//!!!    if (fftSuspended) fft->resume();
}

bool
SpectrogramLayer::paintDrawBufferPeakFrequencies(View *v,
                                                 int w,
                                                 int h,
                                                 int *binforx,
                                                 int minbin,
                                                 int maxbin,
                                                 float displayMinFreq,
                                                 float displayMaxFreq,
                                                 bool logarithmic,
                                                 MagnitudeRange &overallMag,
                                                 bool &overallMagChanged) const
{
    Profiler profiler("SpectrogramLayer::paintDrawBufferPeakFrequencies");

#ifdef DEBUG_SPECTROGRAM_REPAINT
    cerr << "minbin " << minbin << ", maxbin " << maxbin << "; w " << w << ", h " << h << endl;
#endif
    if (minbin < 0) minbin = 0;
    if (maxbin < 0) maxbin = minbin+1;

    FFTModel *fft = getFFTModel(v);
    if (!fft) return false;

    FFTModel::PeakSet peakfreqs;

    int px = -1, psx = -1;

#ifdef __GNUC__
    float values[maxbin - minbin + 1];
#else
    float *values = (float *)alloca((maxbin - minbin + 1) * sizeof(float));
#endif

    for (int x = 0; x < w; ++x) {
        
        if (binforx[x] < 0) continue;

        float columnMax = 0.f;

        int sx0 = binforx[x];
        int sx1 = sx0;
        if (x+1 < w) sx1 = binforx[x+1];
        if (sx0 < 0) sx0 = sx1 - 1;
        if (sx0 < 0) continue;
        if (sx1 <= sx0) sx1 = sx0 + 1;

        for (int sx = sx0; sx < sx1; ++sx) {

            if (x == px && sx == psx) continue;
            if (sx < 0 || sx >= int(fft->getWidth())) continue;

            if (!m_synchronous) {
                if (!fft->isColumnAvailable(sx)) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "Met unavailable column at col " << sx << std::endl;
#endif
                    return false;
                }
            }

            MagnitudeRange mag;

            if (sx != psx) {
                peakfreqs = fft->getPeakFrequencies(FFTModel::AllPeaks, sx,
                                                    minbin, maxbin - 1);
                if (m_colourScale == PhaseColourScale) {
                    fft->getPhasesAt(sx, values, minbin, maxbin - minbin + 1);
                } else if (m_normalizeColumns) {
                    fft->getNormalizedMagnitudesAt(sx, values, minbin, maxbin - minbin + 1);
                } else {
                    fft->getMagnitudesAt(sx, values, minbin, maxbin - minbin + 1);
                }
                psx = sx;
            }

            for (FFTModel::PeakSet::const_iterator pi = peakfreqs.begin();
                 pi != peakfreqs.end(); ++pi) {

                int bin = pi->first;
                int freq = pi->second;

                if (bin < minbin) continue;
                if (bin > maxbin) break;

                float value = values[bin - minbin];

                if (m_colourScale != PhaseColourScale) {
                    if (!m_normalizeColumns) {
                        value /= (m_fftSize/2.f);
                    }
                    mag.sample(value);
                    value *= m_gain;
                }

                float y = v->getYForFrequency
                    (freq, displayMinFreq, displayMaxFreq, logarithmic);

                int iy = int(y + 0.5);
                if (iy < 0 || iy >= h) continue;

                m_drawBuffer.setPixel(x, iy, getDisplayValue(v, value));
            }

            if (mag.isSet()) {
                if (sx >= int(m_columnMags.size())) {
#ifdef DEBUG_SPECTROGRAM
                    std::cerr << "INTERNAL ERROR: " << sx << " >= "
                              << m_columnMags.size()
                              << " at SpectrogramLayer.cpp::paintDrawBuffer"
                              << std::endl;
#endif
                } else {
                    m_columnMags[sx].sample(mag);
                    if (overallMag.sample(mag)) overallMagChanged = true;
                }
            }
        }
    }

    return true;
}

bool
SpectrogramLayer::paintDrawBuffer(View *v,
                                  int w,
                                  int h,
                                  int *binforx,
                                  float *binfory,
                                  bool usePeaksCache,
                                  MagnitudeRange &overallMag,
                                  bool &overallMagChanged) const
{
    Profiler profiler("SpectrogramLayer::paintDrawBuffer");

    int minbin = int(binfory[0] + 0.0001);
    int maxbin = binfory[h-1];

#ifdef DEBUG_SPECTROGRAM_REPAINT
    cerr << "minbin " << minbin << ", maxbin " << maxbin << "; w " << w << ", h " << h << endl;
#endif
    if (minbin < 0) minbin = 0;
    if (maxbin < 0) maxbin = minbin+1;

    DenseThreeDimensionalModel *sourceModel = 0;
    FFTModel *fft = 0;
    int divisor = 1;
#ifdef DEBUG_SPECTROGRAM_REPAINT
    cerr << "Note: bin display = " << m_binDisplay << ", w = " << w << ", binforx[" << w-1 << "] = " << binforx[w-1] << ", binforx[0] = " << binforx[0] << endl;
#endif
    if (usePeaksCache) { //!!!
        sourceModel = getPeakCache(v);
        divisor = 8;//!!!
        minbin = 0;
        maxbin = sourceModel->getHeight();
    } else {
        sourceModel = fft = getFFTModel(v);
    }

    if (!sourceModel) return false;

    bool interpolate = false;
    Preferences::SpectrogramSmoothing smoothing = 
        Preferences::getInstance()->getSpectrogramSmoothing();
    if (smoothing == Preferences::SpectrogramInterpolated ||
        smoothing == Preferences::SpectrogramZeroPaddedAndInterpolated) {
        if (m_binDisplay != PeakBins &&
            m_binDisplay != PeakFrequencies) {
            interpolate = true;
        }
    }

    int psx = -1;

#ifdef __GNUC__
    float autoarray[maxbin - minbin + 1];
    float peaks[h];
#else
    float *autoarray = (float *)alloca((maxbin - minbin + 1) * sizeof(float));
    float *peaks = (float *)alloca(h * sizeof(float));
#endif

    const float *values = autoarray;
    DenseThreeDimensionalModel::Column c;

    for (int x = 0; x < w; ++x) {
        
        if (binforx[x] < 0) continue;

//        float columnGain = m_gain;
        float columnMax = 0.f;

        int sx0 = binforx[x] / divisor;
        int sx1 = sx0;
        if (x+1 < w) sx1 = binforx[x+1] / divisor;
        if (sx0 < 0) sx0 = sx1 - 1;
        if (sx0 < 0) continue;
        if (sx1 <= sx0) sx1 = sx0 + 1;

        for (int y = 0; y < h; ++y) peaks[y] = 0.f;
            
        for (int sx = sx0; sx < sx1; ++sx) {

#ifdef DEBUG_SPECTROGRAM_REPAINT
//            std::cerr << "sx = " << sx << std::endl;
#endif

            if (sx < 0 || sx >= int(sourceModel->getWidth())) continue;

            if (!m_synchronous) {
                if (!sourceModel->isColumnAvailable(sx)) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    std::cerr << "Met unavailable column at col " << sx << std::endl;
#endif
                    return false;
                }
            }

            MagnitudeRange mag;

            if (sx != psx) {
                if (fft) {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    SVDEBUG << "Retrieving column " << sx << " from fft directly" << endl;
#endif
                    if (m_colourScale == PhaseColourScale) {
                        fft->getPhasesAt(sx, autoarray, minbin, maxbin - minbin + 1);
                    } else if (m_normalizeColumns) {
                        fft->getNormalizedMagnitudesAt(sx, autoarray, minbin, maxbin - minbin + 1);
                    } else {
                        fft->getMagnitudesAt(sx, autoarray, minbin, maxbin - minbin + 1);
                    }
                } else {
#ifdef DEBUG_SPECTROGRAM_REPAINT
                    SVDEBUG << "Retrieving column " << sx << " from peaks cache" << endl;
#endif
                    c = sourceModel->getColumn(sx);
                    if (m_normalizeColumns) {
                        for (int y = 0; y < h; ++y) {
                            if (c[y] > columnMax) columnMax = c[y];
                        }
                    }
                    values = c.constData() + minbin;
                }
                psx = sx;
            }

            for (int y = 0; y < h; ++y) {

                float sy0 = binfory[y];
                float sy1 = sy0 + 1;
                if (y+1 < h) sy1 = binfory[y+1];

                float value = 0.f;

                if (interpolate && fabsf(sy1 - sy0) < 1.f) {

                    float centre = (sy0 + sy1) / 2;
                    float dist = (centre - 0.5) - lrintf(centre - 0.5);
                    int bin = int(centre);
                    int other = (dist < 0 ? (bin-1) : (bin+1));
                    if (bin < minbin) bin = minbin;
                    if (bin > maxbin) bin = maxbin;
                    if (other < minbin || other > maxbin) other = bin;
                    float prop = 1.f - fabsf(dist);

                    float v0 = values[bin - minbin];
                    float v1 = values[other - minbin];
                    if (m_binDisplay == PeakBins) {
                        if (bin == minbin || bin == maxbin ||
                            v0 < values[bin-minbin-1] ||
                            v0 < values[bin-minbin+1]) v0 = 0.f;
                        if (other == minbin || other == maxbin ||
                            v1 < values[other-minbin-1] ||
                            v1 < values[other-minbin+1]) v1 = 0.f;
                    }
                    if (v0 == 0.f && v1 == 0.f) continue;
                    value = prop * v0 + (1.f - prop) * v1;

                    if (m_colourScale != PhaseColourScale) {
                        if (!m_normalizeColumns) {
                            value /= (m_fftSize/2.f);
                        }
                        mag.sample(value);
                        value *= m_gain;
                    }

                    peaks[y] = value;

                } else {                    

                    int by0 = int(sy0 + 0.0001);
                    int by1 = int(sy1 + 0.0001);
                    if (by1 < by0 + 1) by1 = by0 + 1;

                    for (int bin = by0; bin < by1; ++bin) {

                        value = values[bin - minbin];
                        if (m_binDisplay == PeakBins) {
                            if (bin == minbin || bin == maxbin ||
                                value < values[bin-minbin-1] ||
                                value < values[bin-minbin+1]) continue;
                        }

                        if (m_colourScale != PhaseColourScale) {
                            if (!m_normalizeColumns) {
                                value /= (m_fftSize/2.f);
                            }
                            mag.sample(value);
                            value *= m_gain;
                        }

                        if (value > peaks[y]) peaks[y] = value; //!!! not right for phase!
                    }
                }
            }

            if (mag.isSet()) {
                if (sx >= int(m_columnMags.size())) {
#ifdef DEBUG_SPECTROGRAM
                    std::cerr << "INTERNAL ERROR: " << sx << " >= "
                              << m_columnMags.size()
                              << " at SpectrogramLayer.cpp::paintDrawBuffer"
                              << std::endl;
#endif
                } else {
                    m_columnMags[sx].sample(mag);
                    if (overallMag.sample(mag)) overallMagChanged = true;
                }
            }
        }

        for (int y = 0; y < h; ++y) {

            float peak = peaks[y];
            
            if (m_colourScale != PhaseColourScale &&
                m_normalizeColumns && 
                columnMax > 0.f) {
                peak /= columnMax;
            }
            
            unsigned char peakpix = getDisplayValue(v, peak);

            m_drawBuffer.setPixel(x, h-y-1, peakpix);
        }
    }

    return true;
}

void
SpectrogramLayer::illuminateLocalFeatures(View *v, QPainter &paint) const
{
    Profiler profiler("SpectrogramLayer::illuminateLocalFeatures");

    QPoint localPos;
    if (!v->shouldIlluminateLocalFeatures(this, localPos) || !m_model) {
        return;
    }

//    std::cerr << "SpectrogramLayer: illuminateLocalFeatures("
//              << localPos.x() << "," << localPos.y() << ")" << std::endl;

    float s0, s1;
    float f0, f1;

    if (getXBinRange(v, localPos.x(), s0, s1) &&
        getYBinSourceRange(v, localPos.y(), f0, f1)) {
        
        int s0i = int(s0 + 0.001);
        int s1i = int(s1);
        
        int x0 = v->getXForFrame(s0i * getWindowIncrement());
        int x1 = v->getXForFrame((s1i + 1) * getWindowIncrement());

        int y1 = int(getYForFrequency(v, f1));
        int y0 = int(getYForFrequency(v, f0));
        
//        std::cerr << "SpectrogramLayer: illuminate "
//                  << x0 << "," << y1 << " -> " << x1 << "," << y0 << std::endl;
        
        paint.setPen(v->getForeground());

        //!!! should we be using paintCrosshairs for this?

        paint.drawRect(x0, y1, x1 - x0 + 1, y0 - y1 + 1);
    }
}

float
SpectrogramLayer::getYForFrequency(const View *v, float frequency) const
{
    return v->getYForFrequency(frequency,
			       getEffectiveMinFrequency(),
			       getEffectiveMaxFrequency(),
			       m_frequencyScale == LogFrequencyScale);
}

float
SpectrogramLayer::getFrequencyForY(const View *v, int y) const
{
    return v->getFrequencyForY(y,
			       getEffectiveMinFrequency(),
			       getEffectiveMaxFrequency(),
			       m_frequencyScale == LogFrequencyScale);
}

int
SpectrogramLayer::getCompletion(View *v) const
{
    if (m_updateTimer == 0) return 100;
    if (m_fftModels.find(v) == m_fftModels.end()) return 100;

    size_t completion = m_fftModels[v].first->getCompletion();
#ifdef DEBUG_SPECTROGRAM_REPAINT
    SVDEBUG << "SpectrogramLayer::getCompletion: completion = " << completion << endl;
#endif
    return completion;
}

QString
SpectrogramLayer::getError(View *v) const
{
    if (m_fftModels.find(v) == m_fftModels.end()) return "";
    return m_fftModels[v].first->getError();
}

bool
SpectrogramLayer::getValueExtents(float &min, float &max,
                                  bool &logarithmic, QString &unit) const
{
    if (!m_model) return false;

    int sr = m_model->getSampleRate();
    min = float(sr) / m_fftSize;
    max = float(sr) / 2;
    
    logarithmic = (m_frequencyScale == LogFrequencyScale);
    unit = "Hz";
    return true;
}

bool
SpectrogramLayer::getDisplayExtents(float &min, float &max) const
{
    min = getEffectiveMinFrequency();
    max = getEffectiveMaxFrequency();

//    SVDEBUG << "SpectrogramLayer::getDisplayExtents: " << min << "->" << max << endl;
    return true;
}    

bool
SpectrogramLayer::setDisplayExtents(float min, float max)
{
    if (!m_model) return false;

//    SVDEBUG << "SpectrogramLayer::setDisplayExtents: " << min << "->" << max << endl;

    if (min < 0) min = 0;
    if (max > m_model->getSampleRate()/2) max = m_model->getSampleRate()/2;
    
    size_t minf = lrintf(min);
    size_t maxf = lrintf(max);

    if (m_minFrequency == minf && m_maxFrequency == maxf) return true;

    invalidateImageCaches();
    invalidateMagnitudes();

    m_minFrequency = minf;
    m_maxFrequency = maxf;
    
    emit layerParametersChanged();

    int vs = getCurrentVerticalZoomStep();
    if (vs != m_lastEmittedZoomStep) {
        emit verticalZoomChanged();
        m_lastEmittedZoomStep = vs;
    }

    return true;
}

bool
SpectrogramLayer::getYScaleValue(const View *v, int y,
                                 float &value, QString &unit) const
{
    value = getFrequencyForY(v, y);
    unit = "Hz";
    return true;
}

bool
SpectrogramLayer::snapToFeatureFrame(View *, int &frame,
				     size_t &resolution,
				     SnapType snap) const
{
    resolution = getWindowIncrement();
    int left = (frame / resolution) * resolution;
    int right = left + resolution;

    switch (snap) {
    case SnapLeft:  frame = left;  break;
    case SnapRight: frame = right; break;
    case SnapNearest:
    case SnapNeighbouring:
	if (frame - left > right - frame) frame = right;
	else frame = left;
	break;
    }
    
    return true;
} 

void
SpectrogramLayer::measureDoubleClick(View *v, QMouseEvent *e)
{
    ImageCache &cache = m_imageCaches[v];

    std::cerr << "cache width: " << cache.image.width() << ", height: "
              << cache.image.height() << std::endl;

    QImage image = cache.image;

    ImageRegionFinder finder;
    QRect rect = finder.findRegionExtents(&image, e->pos());
    if (rect.isValid()) {
        MeasureRect mr;
        setMeasureRectFromPixrect(v, mr, rect);
        CommandHistory::getInstance()->addCommand
            (new AddMeasurementRectCommand(this, mr));
    }
}

bool
SpectrogramLayer::getCrosshairExtents(View *v, QPainter &paint,
                                      QPoint cursorPos,
                                      std::vector<QRect> &extents) const
{
    QRect vertical(cursorPos.x() - 12, 0, 12, v->height());
    extents.push_back(vertical);

    QRect horizontal(0, cursorPos.y(), cursorPos.x(), 1);
    extents.push_back(horizontal);

    int sw = getVerticalScaleWidth(v, paint);

    QRect freq(sw, cursorPos.y() - paint.fontMetrics().ascent() - 2,
               paint.fontMetrics().width("123456 Hz") + 2,
               paint.fontMetrics().height());
    extents.push_back(freq);

    QRect pitch(sw, cursorPos.y() + 2,
                paint.fontMetrics().width("C#10+50c") + 2,
                paint.fontMetrics().height());
    extents.push_back(pitch);

    QRect rt(cursorPos.x(),
             v->height() - paint.fontMetrics().height() - 2,
             paint.fontMetrics().width("1234.567 s"),
             paint.fontMetrics().height());
    extents.push_back(rt);

    int w(paint.fontMetrics().width("1234567890") + 2);
    QRect frame(cursorPos.x() - w - 2,
                v->height() - paint.fontMetrics().height() - 2,
                w,
                paint.fontMetrics().height());
    extents.push_back(frame);

    return true;
}

void
SpectrogramLayer::paintCrosshairs(View *v, QPainter &paint,
                                  QPoint cursorPos) const
{
    paint.save();

    int sw = getVerticalScaleWidth(v, paint);

    QFont fn = paint.font();
    if (fn.pointSize() > 8) {
        fn.setPointSize(fn.pointSize() - 1);
        paint.setFont(fn);
    }
    paint.setPen(m_crosshairColour);

    paint.drawLine(0, cursorPos.y(), cursorPos.x() - 1, cursorPos.y());
    paint.drawLine(cursorPos.x(), 0, cursorPos.x(), v->height());
    
    float fundamental = getFrequencyForY(v, cursorPos.y());

    v->drawVisibleText(paint,
                       sw + 2,
                       cursorPos.y() - 2,
                       QString("%1 Hz").arg(fundamental),
                       View::OutlinedText);

    if (Pitch::isFrequencyInMidiRange(fundamental)) {
        QString pitchLabel = Pitch::getPitchLabelForFrequency(fundamental);
        v->drawVisibleText(paint,
                           sw + 2,
                           cursorPos.y() + paint.fontMetrics().ascent() + 2,
                           pitchLabel,
                           View::OutlinedText);
    }

    long frame = v->getFrameForX(cursorPos.x());
    RealTime rt = RealTime::frame2RealTime(frame, m_model->getSampleRate());
    QString rtLabel = QString("%1 s").arg(rt.toText(true).c_str());
    QString frameLabel = QString("%1").arg(frame);
    v->drawVisibleText(paint,
                       cursorPos.x() - paint.fontMetrics().width(frameLabel) - 2,
                       v->height() - 2,
                       frameLabel,
                       View::OutlinedText);
    v->drawVisibleText(paint,
                       cursorPos.x() + 2,
                       v->height() - 2,
                       rtLabel,
                       View::OutlinedText);

    int harmonic = 2;

    while (harmonic < 100) {

        float hy = lrintf(getYForFrequency(v, fundamental * harmonic));
        if (hy < 0 || hy > v->height()) break;
        
        int len = 7;

        if (harmonic % 2 == 0) {
            if (harmonic % 4 == 0) {
                len = 12;
            } else {
                len = 10;
            }
        }

        paint.drawLine(cursorPos.x() - len,
                       int(hy),
                       cursorPos.x(),
                       int(hy));

        ++harmonic;
    }

    paint.restore();
}

QString
SpectrogramLayer::getFeatureDescription(View *v, QPoint &pos) const
{
    int x = pos.x();
    int y = pos.y();

    if (!m_model || !m_model->isOK()) return "";

    float magMin = 0, magMax = 0;
    float phaseMin = 0, phaseMax = 0;
    float freqMin = 0, freqMax = 0;
    float adjFreqMin = 0, adjFreqMax = 0;
    QString pitchMin, pitchMax;
    RealTime rtMin, rtMax;

    bool haveValues = false;

    if (!getXBinSourceRange(v, x, rtMin, rtMax)) {
	return "";
    }
    if (getXYBinSourceRange(v, x, y, magMin, magMax, phaseMin, phaseMax)) {
	haveValues = true;
    }

    QString adjFreqText = "", adjPitchText = "";

    if (m_binDisplay == PeakFrequencies) {

	if (!getAdjustedYBinSourceRange(v, x, y, freqMin, freqMax,
					adjFreqMin, adjFreqMax)) {
	    return "";
	}

	if (adjFreqMin != adjFreqMax) {
	    adjFreqText = tr("Peak Frequency:\t%1 - %2 Hz\n")
		.arg(adjFreqMin).arg(adjFreqMax);
	} else {
	    adjFreqText = tr("Peak Frequency:\t%1 Hz\n")
		.arg(adjFreqMin);
	}

	QString pmin = Pitch::getPitchLabelForFrequency(adjFreqMin);
	QString pmax = Pitch::getPitchLabelForFrequency(adjFreqMax);

	if (pmin != pmax) {
	    adjPitchText = tr("Peak Pitch:\t%3 - %4\n").arg(pmin).arg(pmax);
	} else {
	    adjPitchText = tr("Peak Pitch:\t%2\n").arg(pmin);
	}

    } else {
	
	if (!getYBinSourceRange(v, y, freqMin, freqMax)) return "";
    }

    QString text;

    if (rtMin != rtMax) {
	text += tr("Time:\t%1 - %2\n")
	    .arg(rtMin.toText(true).c_str())
	    .arg(rtMax.toText(true).c_str());
    } else {
	text += tr("Time:\t%1\n")
	    .arg(rtMin.toText(true).c_str());
    }

    if (freqMin != freqMax) {
	text += tr("%1Bin Frequency:\t%2 - %3 Hz\n%4Bin Pitch:\t%5 - %6\n")
	    .arg(adjFreqText)
	    .arg(freqMin)
	    .arg(freqMax)
	    .arg(adjPitchText)
	    .arg(Pitch::getPitchLabelForFrequency(freqMin))
	    .arg(Pitch::getPitchLabelForFrequency(freqMax));
    } else {
	text += tr("%1Bin Frequency:\t%2 Hz\n%3Bin Pitch:\t%4\n")
	    .arg(adjFreqText)
	    .arg(freqMin)
	    .arg(adjPitchText)
	    .arg(Pitch::getPitchLabelForFrequency(freqMin));
    }	

    if (haveValues) {
	float dbMin = AudioLevel::multiplier_to_dB(magMin);
	float dbMax = AudioLevel::multiplier_to_dB(magMax);
	QString dbMinString;
	QString dbMaxString;
	if (dbMin == AudioLevel::DB_FLOOR) {
	    dbMinString = tr("-Inf");
	} else {
	    dbMinString = QString("%1").arg(lrintf(dbMin));
	}
	if (dbMax == AudioLevel::DB_FLOOR) {
	    dbMaxString = tr("-Inf");
	} else {
	    dbMaxString = QString("%1").arg(lrintf(dbMax));
	}
	if (lrintf(dbMin) != lrintf(dbMax)) {
	    text += tr("dB:\t%1 - %2").arg(dbMinString).arg(dbMaxString);
	} else {
	    text += tr("dB:\t%1").arg(dbMinString);
	}
	if (phaseMin != phaseMax) {
	    text += tr("\nPhase:\t%1 - %2").arg(phaseMin).arg(phaseMax);
	} else {
	    text += tr("\nPhase:\t%1").arg(phaseMin);
	}
    }

    return text;
}

int
SpectrogramLayer::getColourScaleWidth(QPainter &paint) const
{
    int cw;

    cw = paint.fontMetrics().width("-80dB");

    return cw;
}

int
SpectrogramLayer::getVerticalScaleWidth(View *, QPainter &paint) const
{
    if (!m_model || !m_model->isOK()) return 0;

    int cw = getColourScaleWidth(paint);

    int tw = paint.fontMetrics().width(QString("%1")
				     .arg(m_maxFrequency > 0 ?
					  m_maxFrequency - 1 :
					  m_model->getSampleRate() / 2));

    int fw = paint.fontMetrics().width(tr("43Hz"));
    if (tw < fw) tw = fw;

    int tickw = (m_frequencyScale == LogFrequencyScale ? 10 : 4);
    
    return cw + tickw + tw + 13;
}

void
SpectrogramLayer::paintVerticalScale(View *v, QPainter &paint, QRect rect) const
{
    if (!m_model || !m_model->isOK()) {
	return;
    }

    Profiler profiler("SpectrogramLayer::paintVerticalScale");

    //!!! cache this?

    int h = rect.height(), w = rect.width();

    int tickw = (m_frequencyScale == LogFrequencyScale ? 10 : 4);
    int pkw = (m_frequencyScale == LogFrequencyScale ? 10 : 0);

    size_t bins = m_fftSize / 2;
    int sr = m_model->getSampleRate();

    if (m_maxFrequency > 0) {
	bins = int((double(m_maxFrequency) * m_fftSize) / sr + 0.1);
	if (bins > m_fftSize / 2) bins = m_fftSize / 2;
    }

    int cw = getColourScaleWidth(paint);
    int cbw = paint.fontMetrics().width("dB");

    int py = -1;
    int textHeight = paint.fontMetrics().height();
    int toff = -textHeight + paint.fontMetrics().ascent() + 2;

    if (h > textHeight * 3 + 10) {

        int topLines = 2;
        if (m_colourScale == PhaseColourScale) topLines = 1;

	int ch = h - textHeight * (topLines + 1) - 8;
//	paint.drawRect(4, textHeight + 4, cw - 1, ch + 1);
	paint.drawRect(4 + cw - cbw, textHeight * topLines + 4, cbw - 1, ch + 1);

	QString top, bottom;
        float min = m_viewMags[v].getMin();
        float max = m_viewMags[v].getMax();

        float dBmin = AudioLevel::multiplier_to_dB(min);
        float dBmax = AudioLevel::multiplier_to_dB(max);

        if (dBmax < -60.f) dBmax = -60.f;
        else top = QString("%1").arg(lrintf(dBmax));

        if (dBmin < dBmax - 60.f) dBmin = dBmax - 60.f;
        bottom = QString("%1").arg(lrintf(dBmin));

        //!!! & phase etc

        if (m_colourScale != PhaseColourScale) {
            paint.drawText((cw + 6 - paint.fontMetrics().width("dBFS")) / 2,
                           2 + textHeight + toff, "dBFS");
        }

//	paint.drawText((cw + 6 - paint.fontMetrics().width(top)) / 2,
	paint.drawText(3 + cw - cbw - paint.fontMetrics().width(top),
		       2 + textHeight * topLines + toff + textHeight/2, top);

	paint.drawText(3 + cw - cbw - paint.fontMetrics().width(bottom),
		       h + toff - 3 - textHeight/2, bottom);

	paint.save();
	paint.setBrush(Qt::NoBrush);

        int lasty = 0;
        int lastdb = 0;

	for (int i = 0; i < ch; ++i) {

            float dBval = dBmin + (((dBmax - dBmin) * i) / (ch - 1));
            int idb = int(dBval);

            float value = AudioLevel::dB_to_multiplier(dBval);
            int colour = getDisplayValue(v, value * m_gain);

	    paint.setPen(m_palette.getColour(colour));

            int y = textHeight * topLines + 4 + ch - i;

            paint.drawLine(5 + cw - cbw, y, cw + 2, y);

            if (i == 0) {
                lasty = y;
                lastdb = idb;
            } else if (i < ch - paint.fontMetrics().ascent() &&
                       idb != lastdb &&
                       ((abs(y - lasty) > textHeight && 
                         idb % 10 == 0) ||
                        (abs(y - lasty) > paint.fontMetrics().ascent() && 
                         idb % 5 == 0))) {
                paint.setPen(v->getBackground());
                QString text = QString("%1").arg(idb);
                paint.drawText(3 + cw - cbw - paint.fontMetrics().width(text),
                               y + toff + textHeight/2, text);
                paint.setPen(v->getForeground());
                paint.drawLine(5 + cw - cbw, y, 8 + cw - cbw, y);
                lasty = y;
                lastdb = idb;
            }
	}
	paint.restore();
    }

    paint.drawLine(cw + 7, 0, cw + 7, h);

    int bin = -1;

    for (int y = 0; y < v->height(); ++y) {

	float q0, q1;
	if (!getYBinRange(v, v->height() - y, q0, q1)) continue;

	int vy;

	if (int(q0) > bin) {
	    vy = y;
	    bin = int(q0);
	} else {
	    continue;
	}

	int freq = (sr * bin) / m_fftSize;

	if (py >= 0 && (vy - py) < textHeight - 1) {
	    if (m_frequencyScale == LinearFrequencyScale) {
		paint.drawLine(w - tickw, h - vy, w, h - vy);
	    }
	    continue;
	}

	QString text = QString("%1").arg(freq);
	if (bin == 1) text = tr("%1Hz").arg(freq); // bin 0 is DC
	paint.drawLine(cw + 7, h - vy, w - pkw - 1, h - vy);

	if (h - vy - textHeight >= -2) {
	    int tx = w - 3 - paint.fontMetrics().width(text) - std::max(tickw, pkw);
	    paint.drawText(tx, h - vy + toff, text);
	}

	py = vy;
    }

    if (m_frequencyScale == LogFrequencyScale) {

        // piano keyboard

	paint.drawLine(w - pkw - 1, 0, w - pkw - 1, h);

	float minf = getEffectiveMinFrequency();
	float maxf = getEffectiveMaxFrequency();

	int py = h, ppy = h;
	paint.setBrush(paint.pen().color());

	for (int i = 0; i < 128; ++i) {

	    float f = Pitch::getFrequencyForPitch(i);
	    int y = lrintf(v->getYForFrequency(f, minf, maxf, true));

            if (y < -2) break;
            if (y > h + 2) {
                continue;
            }

	    int n = (i % 12);

            if (n == 1) {
                // C# -- fill the C from here
                QColor col = Qt::gray;
                if (i == 61) { // filling middle C
                    col = Qt::blue;
                    col = col.light(150);
                }
                if (ppy - y > 2) {
                    paint.fillRect(w - pkw,
                                   y,
                                   pkw,
                                   (py + ppy) / 2 - y,
                                   col);
                }
            }

	    if (n == 1 || n == 3 || n == 6 || n == 8 || n == 10) {
		// black notes
		paint.drawLine(w - pkw, y, w, y);
		int rh = ((py - y) / 4) * 2;
		if (rh < 2) rh = 2;
		paint.drawRect(w - pkw, y - (py-y)/4, pkw/2, rh);
	    } else if (n == 0 || n == 5) {
		// C, F
		if (py < h) {
		    paint.drawLine(w - pkw, (y + py) / 2, w, (y + py) / 2);
		}
	    }

            ppy = py;
	    py = y;
	}
    }
}

class SpectrogramRangeMapper : public RangeMapper
{
public:
    SpectrogramRangeMapper(int sr, int /* fftsize */) :
        m_dist(float(sr) / 2),
        m_s2(sqrtf(sqrtf(2))) { }
    ~SpectrogramRangeMapper() { }
    
    virtual int getPositionForValue(float value) const {

        float dist = m_dist;
    
        int n = 0;

        while (dist > (value + 0.00001) && dist > 0.1f) {
            dist /= m_s2;
            ++n;
        }

        return n;
    }

    virtual float getValueForPosition(int position) const {

        // Vertical zoom step 0 shows the entire range from DC ->
        // Nyquist frequency.  Step 1 shows 2^(1/4) of the range of
        // step 0, and so on until the visible range is smaller than
        // the frequency step between bins at the current fft size.

        float dist = m_dist;
    
        int n = 0;
        while (n < position) {
            dist /= m_s2;
            ++n;
        }

        return dist;
    }
    
    virtual QString getUnit() const { return "Hz"; }

protected:
    float m_dist;
    float m_s2;
};

int
SpectrogramLayer::getVerticalZoomSteps(int &defaultStep) const
{
    if (!m_model) return 0;

    int sr = m_model->getSampleRate();

    SpectrogramRangeMapper mapper(sr, m_fftSize);

//    int maxStep = mapper.getPositionForValue((float(sr) / m_fftSize) + 0.001);
    int maxStep = mapper.getPositionForValue(0);
    int minStep = mapper.getPositionForValue(float(sr) / 2);

    size_t initialMax = m_initialMaxFrequency;
    if (initialMax == 0) initialMax = sr / 2;

    defaultStep = mapper.getPositionForValue(initialMax) - minStep;

//    SVDEBUG << "SpectrogramLayer::getVerticalZoomSteps: " << maxStep - minStep << " (" << maxStep <<"-" << minStep << "), default is " << defaultStep << " (from initial max freq " << initialMax << ")" << endl;

    return maxStep - minStep;
}

int
SpectrogramLayer::getCurrentVerticalZoomStep() const
{
    if (!m_model) return 0;

    float dmin, dmax;
    getDisplayExtents(dmin, dmax);
    
    SpectrogramRangeMapper mapper(m_model->getSampleRate(), m_fftSize);
    int n = mapper.getPositionForValue(dmax - dmin);
//    SVDEBUG << "SpectrogramLayer::getCurrentVerticalZoomStep: " << n << endl;
    return n;
}

void
SpectrogramLayer::setVerticalZoomStep(int step)
{
    if (!m_model) return;

    float dmin = m_minFrequency, dmax = m_maxFrequency;
//    getDisplayExtents(dmin, dmax);

//    std::cerr << "current range " << dmin << " -> " << dmax << ", range " << dmax-dmin << ", mid " << (dmax + dmin)/2 << std::endl;
    
    int sr = m_model->getSampleRate();
    SpectrogramRangeMapper mapper(sr, m_fftSize);
    float newdist = mapper.getValueForPosition(step);

    float newmin, newmax;

    if (m_frequencyScale == LogFrequencyScale) {

        // need to pick newmin and newmax such that
        //
        // (log(newmin) + log(newmax)) / 2 == logmid
        // and
        // newmax - newmin = newdist
        //
        // so log(newmax - newdist) + log(newmax) == 2logmid
        // log(newmax(newmax - newdist)) == 2logmid
        // newmax.newmax - newmax.newdist == exp(2logmid)
        // newmax^2 + (-newdist)newmax + -exp(2logmid) == 0
        // quadratic with a = 1, b = -newdist, c = -exp(2logmid), all known
        // 
        // positive root
        // newmax = (newdist + sqrt(newdist^2 + 4exp(2logmid))) / 2
        //
        // but logmid = (log(dmin) + log(dmax)) / 2
        // so exp(2logmid) = exp(log(dmin) + log(dmax))
        // = exp(log(dmin.dmax))
        // = dmin.dmax
        // so newmax = (newdist + sqrtf(newdist^2 + 4dmin.dmax)) / 2

        newmax = (newdist + sqrtf(newdist*newdist + 4*dmin*dmax)) / 2;
        newmin = newmax - newdist;

//        std::cerr << "newmin = " << newmin << ", newmax = " << newmax << std::endl;

    } else {
        float dmid = (dmax + dmin) / 2;
        newmin = dmid - newdist / 2;
        newmax = dmid + newdist / 2;
    }

    float mmin, mmax;
    mmin = 0;
    mmax = float(sr) / 2;
    
    if (newmin < mmin) {
        newmax += (mmin - newmin);
        newmin = mmin;
    }
    if (newmax > mmax) {
        newmax = mmax;
    }
    
//    SVDEBUG << "SpectrogramLayer::setVerticalZoomStep: " << step << ": " << newmin << " -> " << newmax << " (range " << newdist << ")" << endl;

    setMinFrequency(lrintf(newmin));
    setMaxFrequency(lrintf(newmax));
}

RangeMapper *
SpectrogramLayer::getNewVerticalZoomRangeMapper() const
{
    if (!m_model) return 0;
    return new SpectrogramRangeMapper(m_model->getSampleRate(), m_fftSize);
}

void
SpectrogramLayer::updateMeasureRectYCoords(View *v, const MeasureRect &r) const
{
    int y0 = 0;
    if (r.startY > 0.0) y0 = getYForFrequency(v, r.startY);
    
    int y1 = y0;
    if (r.endY > 0.0) y1 = getYForFrequency(v, r.endY);

//    SVDEBUG << "SpectrogramLayer::updateMeasureRectYCoords: start " << r.startY << " -> " << y0 << ", end " << r.endY << " -> " << y1 << endl;

    r.pixrect = QRect(r.pixrect.x(), y0, r.pixrect.width(), y1 - y0);
}

void
SpectrogramLayer::setMeasureRectYCoord(View *v, MeasureRect &r, bool start, int y) const
{
    if (start) {
        r.startY = getFrequencyForY(v, y);
        r.endY = r.startY;
    } else {
        r.endY = getFrequencyForY(v, y);
    }
//    SVDEBUG << "SpectrogramLayer::setMeasureRectYCoord: start " << r.startY << " <- " << y << ", end " << r.endY << " <- " << y << endl;

}

void
SpectrogramLayer::toXml(QTextStream &stream,
                        QString indent, QString extraAttributes) const
{
    QString s;
    
    s += QString("channel=\"%1\" "
		 "windowSize=\"%2\" "
		 "windowHopLevel=\"%3\" "
		 "gain=\"%4\" "
		 "threshold=\"%5\" ")
	.arg(m_channel)
	.arg(m_windowSize)
	.arg(m_windowHopLevel)
	.arg(m_gain)
	.arg(m_threshold);

    s += QString("minFrequency=\"%1\" "
		 "maxFrequency=\"%2\" "
		 "colourScale=\"%3\" "
		 "colourScheme=\"%4\" "
		 "colourRotation=\"%5\" "
		 "frequencyScale=\"%6\" "
		 "binDisplay=\"%7\" "
		 "normalizeColumns=\"%8\" "
                 "normalizeVisibleArea=\"%9\"")
	.arg(m_minFrequency)
	.arg(m_maxFrequency)
	.arg(m_colourScale)
	.arg(m_colourMap)
	.arg(m_colourRotation)
	.arg(m_frequencyScale)
	.arg(m_binDisplay)
	.arg(m_normalizeColumns ? "true" : "false")
        .arg(m_normalizeVisibleArea ? "true" : "false");

    Layer::toXml(stream, indent, extraAttributes + " " + s);
}

void
SpectrogramLayer::setProperties(const QXmlAttributes &attributes)
{
    bool ok = false;

    int channel = attributes.value("channel").toInt(&ok);
    if (ok) setChannel(channel);

    size_t windowSize = attributes.value("windowSize").toUInt(&ok);
    if (ok) setWindowSize(windowSize);

    size_t windowHopLevel = attributes.value("windowHopLevel").toUInt(&ok);
    if (ok) setWindowHopLevel(windowHopLevel);
    else {
        size_t windowOverlap = attributes.value("windowOverlap").toUInt(&ok);
        // a percentage value
        if (ok) {
            if (windowOverlap == 0) setWindowHopLevel(0);
            else if (windowOverlap == 25) setWindowHopLevel(1);
            else if (windowOverlap == 50) setWindowHopLevel(2);
            else if (windowOverlap == 75) setWindowHopLevel(3);
            else if (windowOverlap == 90) setWindowHopLevel(4);
        }
    }

    float gain = attributes.value("gain").toFloat(&ok);
    if (ok) setGain(gain);

    float threshold = attributes.value("threshold").toFloat(&ok);
    if (ok) setThreshold(threshold);

    size_t minFrequency = attributes.value("minFrequency").toUInt(&ok);
    if (ok) {
        SVDEBUG << "SpectrogramLayer::setProperties: setting min freq to " << minFrequency << endl;
        setMinFrequency(minFrequency);
    }

    size_t maxFrequency = attributes.value("maxFrequency").toUInt(&ok);
    if (ok) {
        SVDEBUG << "SpectrogramLayer::setProperties: setting max freq to " << maxFrequency << endl;
        setMaxFrequency(maxFrequency);
    }

    ColourScale colourScale = (ColourScale)
	attributes.value("colourScale").toInt(&ok);
    if (ok) setColourScale(colourScale);

    int colourMap = attributes.value("colourScheme").toInt(&ok);
    if (ok) setColourMap(colourMap);

    int colourRotation = attributes.value("colourRotation").toInt(&ok);
    if (ok) setColourRotation(colourRotation);

    FrequencyScale frequencyScale = (FrequencyScale)
	attributes.value("frequencyScale").toInt(&ok);
    if (ok) setFrequencyScale(frequencyScale);

    BinDisplay binDisplay = (BinDisplay)
	attributes.value("binDisplay").toInt(&ok);
    if (ok) setBinDisplay(binDisplay);

    bool normalizeColumns =
	(attributes.value("normalizeColumns").trimmed() == "true");
    setNormalizeColumns(normalizeColumns);

    bool normalizeVisibleArea =
	(attributes.value("normalizeVisibleArea").trimmed() == "true");
    setNormalizeVisibleArea(normalizeVisibleArea);
}
    
bool
SpectrogramLayer::scaleClicked(const View *v, QMouseEvent *e)
{
    std::cerr<< "Mouse click detected in the spectrogram scale area: (" << e->x() << "," << e->y() << ")" << std::endl;

    float freq;
    QString unit;
    float *centsOffsetReturn = 0;
    float concertA = 0.0;
    int midipitch;

    if (getYScaleValue(v, e->y(), freq, unit)) {

        midipitch = Pitch::getPitchForFrequency(freq,centsOffsetReturn,concertA);

        std::cerr<< "Frequency: " << freq << " " << unit.toStdString() << " (midi pitch = " << midipitch << ")" << std::endl;

        return true;
    } else {
        return false;
    }
}