Chris@0: /* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@0:     A waveform viewer and audio annotation editor.
Chris@4:     Chris Cannam, Queen Mary University of London, 2005-2006
Chris@0:    
Chris@0:     This is experimental software.  Not for distribution.
Chris@0: */
Chris@0: 
Chris@0: #include "WaveformLayer.h"
Chris@0: 
Chris@0: #include "base/AudioLevel.h"
Chris@0: #include "base/View.h"
Chris@0: #include "base/Profiler.h"
Chris@0: 
Chris@0: #include <QPainter>
Chris@0: #include <QPixmap>
Chris@0: 
Chris@0: #include <iostream>
Chris@0: #include <cmath>
Chris@0: 
Chris@4: //#define DEBUG_WAVEFORM_PAINT 1
Chris@4: 
Chris@0: using std::cerr;
Chris@0: using std::endl;
Chris@0: 
Chris@0: WaveformLayer::WaveformLayer(View *w) :
Chris@0:     Layer(w),
Chris@0:     m_model(0),
Chris@0:     m_gain(1.0f),
Chris@0:     m_colour(Qt::black),
Chris@0:     m_showMeans(true),
Chris@0:     m_greyscale(true),
Chris@0:     m_channelMode(SeparateChannels),
Chris@0:     m_channel(-1),
Chris@0:     m_scale(LinearScale),
Chris@0:     m_aggressive(false),
Chris@0:     m_cache(0),
Chris@0:     m_cacheValid(false)
Chris@0: {
Chris@0:     m_view->addLayer(this);
Chris@0: }
Chris@0: 
Chris@0: WaveformLayer::~WaveformLayer()
Chris@0: {
Chris@0:     delete m_cache;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setModel(const RangeSummarisableTimeValueModel *model)
Chris@0: {
Chris@0:     m_model = model;
Chris@0:     m_cacheValid = false;
Chris@0:     if (!m_model || !m_model->isOK()) return;
Chris@0: 
Chris@0:     connect(m_model, SIGNAL(modelChanged()), this, SIGNAL(modelChanged()));
Chris@0:     connect(m_model, SIGNAL(modelChanged(size_t, size_t)),
Chris@0: 	    this, SIGNAL(modelChanged(size_t, size_t)));
Chris@0: 
Chris@0:     connect(m_model, SIGNAL(completionChanged()),
Chris@0: 	    this, SIGNAL(modelCompletionChanged()));
Chris@0: 
Chris@0:     emit modelReplaced();
Chris@0: }
Chris@0: 
Chris@0: Layer::PropertyList
Chris@0: WaveformLayer::getProperties() const
Chris@0: {
Chris@0:     PropertyList list;
Chris@0:     list.push_back(tr("Colour"));
Chris@0:     list.push_back(tr("Scale"));
Chris@0:     list.push_back(tr("Gain"));
Chris@0:     list.push_back(tr("Merge Channels"));
Chris@0:     return list;
Chris@0: }
Chris@0: 
Chris@0: Layer::PropertyType
Chris@0: WaveformLayer::getPropertyType(const PropertyName &name) const
Chris@0: {
Chris@0:     if (name == tr("Gain")) return RangeProperty;
Chris@0:     if (name == tr("Colour")) return ValueProperty;
Chris@0:     if (name == tr("Merge Channels")) return ToggleProperty;
Chris@0:     if (name == tr("Scale")) return ValueProperty;
Chris@0:     return InvalidProperty;
Chris@0: }
Chris@0: 
Chris@0: QString
Chris@0: WaveformLayer::getPropertyGroupName(const PropertyName &name) const
Chris@0: {
Chris@0:     if (name == tr("Gain") ||
Chris@0: 	name == tr("Scale")) return tr("Scale");
Chris@0:     return QString();
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::getPropertyRangeAndValue(const PropertyName &name,
Chris@0: 					 int *min, int *max) const
Chris@0: {
Chris@0:     int deft = 0;
Chris@0: 
Chris@10:     int throwaway;
Chris@10:     if (!min) min = &throwaway;
Chris@10:     if (!max) max = &throwaway;
Chris@10: 
Chris@0:     if (name == tr("Gain")) {
Chris@0: 
Chris@0: 	*min = -50;
Chris@0: 	*max = 50;
Chris@0: 
Chris@0: 	deft = int(nearbyint(log10(m_gain) * 20.0));
Chris@0: 	if (deft < *min) deft = *min;
Chris@0: 	if (deft > *max) deft = *max;
Chris@0: 
Chris@0:     } else if (name == tr("Colour")) {
Chris@0: 
Chris@0: 	*min = 0;
Chris@0: 	*max = 5;
Chris@0: 
Chris@0: 	if (m_colour == Qt::black) deft = 0;
Chris@0: 	else if (m_colour == Qt::darkRed) deft = 1;
Chris@0: 	else if (m_colour == Qt::darkBlue) deft = 2;
Chris@0: 	else if (m_colour == Qt::darkGreen) deft = 3;
Chris@0: 	else if (m_colour == QColor(200, 50, 255)) deft = 4;
Chris@0: 	else if (m_colour == QColor(255, 150, 50)) deft = 5;
Chris@0: 
Chris@0:     } else if (name == tr("Merge Channels")) {
Chris@0: 
Chris@0: 	deft = ((m_channelMode == MergeChannels) ? 1 : 0);
Chris@0: 
Chris@0:     } else if (name == tr("Scale")) {
Chris@0: 
Chris@0: 	*min = 0;
Chris@0: 	*max = 2;
Chris@0: 
Chris@0: 	deft = (int)m_scale;
Chris@0: 
Chris@0:     } else {
Chris@0: 	deft = Layer::getPropertyRangeAndValue(name, min, max);
Chris@0:     }
Chris@0: 
Chris@0:     return deft;
Chris@0: }
Chris@0: 
Chris@0: QString
Chris@0: WaveformLayer::getPropertyValueLabel(const PropertyName &name,
Chris@0: 				    int value) const
Chris@0: {
Chris@0:     if (name == tr("Colour")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0: return tr("Black");
Chris@0: 	case 1: return tr("Red");
Chris@0: 	case 2: return tr("Blue");
Chris@0: 	case 3: return tr("Green");
Chris@0: 	case 4: return tr("Purple");
Chris@0: 	case 5: return tr("Orange");
Chris@0: 	}
Chris@0:     }
Chris@0:     if (name == tr("Scale")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0: return tr("Linear");
Chris@0: 	case 1: return tr("Meter");
Chris@0: 	case 2: return tr("dB");
Chris@0: 	}
Chris@0:     }
Chris@0:     return tr("<unknown>");
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setProperty(const PropertyName &name, int value)
Chris@0: {
Chris@0:     if (name == tr("Gain")) {
Chris@0: 	setGain(pow(10, float(value)/20.0));
Chris@0:     } else if (name == tr("Colour")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0:	setBaseColour(Qt::black); break;
Chris@0: 	case 1: setBaseColour(Qt::darkRed); break;
Chris@0: 	case 2: setBaseColour(Qt::darkBlue); break;
Chris@0: 	case 3: setBaseColour(Qt::darkGreen); break;
Chris@0: 	case 4: setBaseColour(QColor(200, 50, 255)); break;
Chris@0: 	case 5: setBaseColour(QColor(255, 150, 50)); break;
Chris@0: 	}
Chris@0:     } else if (name == tr("Merge Channels")) {
Chris@0: 	setChannelMode(value ? MergeChannels : SeparateChannels);
Chris@0:     } else if (name == tr("Scale")) {
Chris@0: 	switch (value) {
Chris@0: 	default:
Chris@0: 	case 0: setScale(LinearScale); break;
Chris@0: 	case 1: setScale(MeterScale); break;
Chris@0: 	case 2: setScale(dBScale); break;
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: /*
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::getProperty(const PropertyName &name)
Chris@0: {
Chris@0:     if (name == "Gain") {
Chris@0: 	return int((getGain() - 1.0) * 10.0 + 0.01);
Chris@0:     }
Chris@0:     if (name == "Colour") {
Chris@0: 	
Chris@0: */
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setGain(float gain) //!!! inadequate for floats!
Chris@0: {
Chris@0:     if (m_gain == gain) return;
Chris@0:     m_gain = gain;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setBaseColour(QColor colour)
Chris@0: {
Chris@0:     if (m_colour == colour) return;
Chris@0:     m_colour = colour;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setShowMeans(bool showMeans)
Chris@0: {
Chris@0:     if (m_showMeans == showMeans) return;
Chris@0:     m_showMeans = showMeans;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setUseGreyscale(bool useGreyscale)
Chris@0: {
Chris@0:     if (m_greyscale == useGreyscale) return;
Chris@0:     m_greyscale = useGreyscale;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setChannelMode(ChannelMode channelMode)
Chris@0: {
Chris@0:     if (m_channelMode == channelMode) return;
Chris@0:     m_channelMode = channelMode;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setChannel(int channel)
Chris@0: {
Chris@0:     std::cerr << "WaveformLayer::setChannel(" << channel << ")" << std::endl;
Chris@0: 
Chris@0:     if (m_channel == channel) return;
Chris@0:     m_channel = channel;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setScale(Scale scale)
Chris@0: {
Chris@0:     if (m_scale == scale) return;
Chris@0:     m_scale = scale;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::setAggressiveCacheing(bool aggressive)
Chris@0: {
Chris@0:     if (m_aggressive == aggressive) return;
Chris@0:     m_aggressive = aggressive;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::getCompletion() const
Chris@0: {
Chris@0:     int completion = 100;
Chris@0:     if (!m_model || !m_model->isOK()) return completion;
Chris@0:     if (m_model->isReady(&completion)) return 100;
Chris@0:     return completion;
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::dBscale(float sample, int m) const
Chris@0: {
Chris@0:     if (sample < 0.0) return -dBscale(-sample, m);
Chris@0:     float dB = AudioLevel::multiplier_to_dB(sample);
Chris@0:     if (dB < -50.0) return 0;
Chris@0:     if (dB > 0.0) return m;
Chris@0:     return int(((dB + 50.0) * m) / 50.0 + 0.1);
Chris@0: }
Chris@0: 
Chris@0: size_t
Chris@0: WaveformLayer::getChannelArrangement(size_t &min, size_t &max, bool &merging)
Chris@0:     const
Chris@0: {
Chris@0:     if (!m_model || !m_model->isOK()) return 0;
Chris@0: 
Chris@0:     size_t channels = m_model->getChannelCount();
Chris@0:     if (channels == 0) return 0;
Chris@0: 
Chris@0:     size_t rawChannels = channels;
Chris@0: 
Chris@0:     if (m_channel == -1) {
Chris@0: 	min = 0;
Chris@0: 	if (m_channelMode == MergeChannels) {
Chris@0: 	    max = 0;
Chris@0: 	    channels = 1;
Chris@0: 	} else {
Chris@0: 	    max = channels - 1;
Chris@0: 	}
Chris@0:     } else {
Chris@0: 	min = m_channel;
Chris@0: 	max = m_channel;
Chris@0: 	rawChannels = 1;
Chris@0: 	channels = 1;
Chris@0:     }
Chris@0: 
Chris@0:     merging = (m_channelMode == MergeChannels && rawChannels > 1);
Chris@0: 
Chris@0: //    std::cerr << "WaveformLayer::getChannelArrangement: min " << min << ", max " << max << ", merging " << merging << ", channels " << channels << std::endl;
Chris@0: 
Chris@0:     return channels;
Chris@0: }    
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::paint(QPainter &viewPainter, QRect rect) const
Chris@0: {
Chris@0:     if (!m_model || !m_model->isOK()) {
Chris@0: 	return;
Chris@0:     }
Chris@0:   
Chris@0:     long startFrame = m_view->getStartFrame();
Chris@0:     int zoomLevel = m_view->getZoomLevel();
Chris@0: 
Chris@2: #ifdef DEBUG_WAVEFORM_PAINT
Chris@0:     Profiler profiler("WaveformLayer::paint", true);
Chris@0:     std::cerr << "WaveformLayer::paint (" << rect.x() << "," << rect.y()
Chris@0: 	      << ") [" << rect.width() << "x" << rect.height() << "]: zoom " << zoomLevel << ", start " << startFrame << std::endl;
Chris@2: #endif
Chris@0: 
Chris@0:     size_t channels = 0, minChannel = 0, maxChannel = 0;
Chris@0:     bool mergingChannels = false;
Chris@0: 
Chris@0:     channels = getChannelArrangement(minChannel, maxChannel, mergingChannels);
Chris@0:     if (channels == 0) return;
Chris@0: 
Chris@0:     int w = m_view->width();
Chris@0:     int h = m_view->height();
Chris@0: 
Chris@0:     bool ready = m_model->isReady();
Chris@0:     QPainter *paint;
Chris@0: 
Chris@0:     if (m_aggressive) {
Chris@0: 
Chris@0: 	if (m_cacheValid && (zoomLevel != m_cacheZoomLevel)) {
Chris@0: 	    m_cacheValid = false;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (m_cacheValid) {
Chris@0: 	    viewPainter.drawPixmap(rect, *m_cache, rect);
Chris@0: 	    return;
Chris@0: 	}
Chris@0: 
Chris@0: 	if (!m_cache || m_cache->width() != w || m_cache->height() != h) {
Chris@0: 	    delete m_cache;
Chris@0: 	    m_cache = new QPixmap(w, h);
Chris@0: 	}
Chris@0: 
Chris@0: 	paint = new QPainter(m_cache);
Chris@0: 
Chris@0: 	paint->setPen(Qt::NoPen);
Chris@0: 	paint->setBrush(m_view->palette().background());
Chris@0: 	paint->drawRect(rect);
Chris@0: 
Chris@0: 	paint->setPen(Qt::black);
Chris@0: 	paint->setBrush(Qt::NoBrush);
Chris@0: 
Chris@13: 	paint->setRenderHint(QPainter::Antialiasing, false);
Chris@13: 
Chris@0:     } else {
Chris@0: 	paint = &viewPainter;
Chris@0:     }
Chris@0: 
Chris@0:     int x0 = 0, x1 = w - 1;
Chris@0:     int y0 = 0, y1 = h - 1;
Chris@0: 
Chris@0:     x0 = rect.left();
Chris@0:     x1 = rect.right();
Chris@0:     y0 = rect.top();
Chris@0:     y1 = rect.bottom();
Chris@0: 
Chris@0:     long frame0 = startFrame + x0 * zoomLevel;
Chris@0:     long frame1 = startFrame + (x1 + 1) * zoomLevel;
Chris@0:      
Chris@4: #ifdef DEBUG_WAVEFORM_PAINT
Chris@4:     std::cerr << "Painting waveform from " << frame0 << " to " << frame1 << " (" << (x1-x0+1) << " pixels at zoom " << zoomLevel << ")" <<  std::endl;
Chris@4: #endif
Chris@0: 
Chris@0:     RangeSummarisableTimeValueModel::RangeBlock ranges;
Chris@0:     RangeSummarisableTimeValueModel::RangeBlock otherChannelRanges;
Chris@0:     RangeSummarisableTimeValueModel::Range range;
Chris@0:     
Chris@0:     QColor greys[3];
Chris@0:     if (m_colour == Qt::black) {
Chris@0: 	for (int i = 0; i < 3; ++i) {
Chris@0: 	    int level = 192 - 64 * i;
Chris@0: 	    greys[i] = QColor(level, level, level);
Chris@0: 	}
Chris@0:     } else {
Chris@0: 	int factor = (m_view->hasLightBackground() ? 120 : 80);
Chris@0: 	greys[2] = m_colour.light(factor);
Chris@0: 	greys[1] = greys[2].light(factor);
Chris@0: 	greys[0] = greys[1].light(factor);
Chris@0:     }
Chris@0:         
Chris@0:     QColor midColour = m_colour;
Chris@0:     if (midColour == Qt::black) {
Chris@0: 	midColour = Qt::gray;
Chris@0:     } else if (m_view->hasLightBackground()) {
Chris@0: 	midColour = midColour.light(150);
Chris@0:     } else {
Chris@0: 	midColour = midColour.light(50);
Chris@0:     }
Chris@0: 
Chris@0:     for (size_t ch = minChannel; ch <= maxChannel; ++ch) {
Chris@0: 
Chris@0: 	int prevRangeBottom = -1, prevRangeTop = -1;
Chris@0: 
Chris@0: 	int m = (h / channels) / 2;
Chris@0: 	int my = m + (((ch - minChannel) * h) / channels);
Chris@0: 	
Chris@0: //	std::cerr << "ch = " << ch << ", channels = " << channels << ", m = " << m << ", my = " << my << ", h = " << h << std::endl;
Chris@0: 
Chris@0: 	if (my - m > y1 || my + m < y0) continue;
Chris@0: 
Chris@0: 	paint->setPen(greys[0]);
Chris@0: 	paint->drawLine(x0, my, x1, my);
Chris@0: 
Chris@0: 	if (frame1 <= 0) continue;
Chris@0: 
Chris@0: 	size_t modelZoomLevel = zoomLevel;
Chris@0: 
Chris@0: 	ranges = m_model->getRanges
Chris@0: 	    (ch, frame0 < 0 ? 0 : frame0, frame1, modelZoomLevel);
Chris@0:         
Chris@0: 	if (mergingChannels) {
Chris@0: 	    otherChannelRanges = m_model->getRanges
Chris@0: 		(1, frame0 < 0 ? 0 : frame0, frame1, modelZoomLevel);
Chris@0: 	}
Chris@0: 
Chris@0: 	for (int x = x0; x <= x1; ++x) {
Chris@0: 
Chris@0: 	    range = RangeSummarisableTimeValueModel::Range();
Chris@0: 	    size_t index = x - x0;
Chris@0: 	    size_t maxIndex = index;
Chris@0: 
Chris@0: 	    if (frame0 < 0) {
Chris@0: 		if (index < size_t(-frame0 / zoomLevel)) {
Chris@0: 		    continue;
Chris@0: 		} else {
Chris@0: 		    index -= -frame0 / zoomLevel;
Chris@0: 		    maxIndex = index;
Chris@0: 		}
Chris@0: 	    }
Chris@0:             
Chris@0: 	    if (int(modelZoomLevel) != zoomLevel) {
Chris@0: 
Chris@0: 		index = size_t((double(index) * zoomLevel) / modelZoomLevel);
Chris@0: 
Chris@0: 		if (int(modelZoomLevel) < zoomLevel) {
Chris@0: 		    // Peaks may be missed!  The model should avoid
Chris@0: 		    // this by rounding zoom levels up rather than
Chris@0: 		    // down, but we'd better cope in case it doesn't
Chris@0: 		    maxIndex = index;
Chris@0: 		} else {
Chris@0: 		    maxIndex = size_t((double(index + 1) * zoomLevel)
Chris@0: 				      / modelZoomLevel) - 1;
Chris@0: 		}
Chris@0: 	    }
Chris@0: 
Chris@0: 	    if (index < ranges.size()) {
Chris@0: 
Chris@0: 		range = ranges[index];
Chris@0: 
Chris@0: 		if (maxIndex > index && maxIndex < ranges.size()) {
Chris@0: 		    range.max = std::max(range.max, ranges[maxIndex].max);
Chris@0: 		    range.min = std::min(range.min, ranges[maxIndex].min);
Chris@0: 		    range.absmean = (range.absmean +
Chris@0: 				     ranges[maxIndex].absmean) / 2;
Chris@0: 		}
Chris@0: 
Chris@0: 	    } else {
Chris@0: 		continue;
Chris@0: 	    }
Chris@0: 
Chris@0: 	    int rangeBottom = 0, rangeTop = 0, meanBottom = 0, meanTop = 0;
Chris@0: 
Chris@0: 	    if (mergingChannels) {
Chris@0: 
Chris@0: 		if (index < otherChannelRanges.size()) {
Chris@0: 
Chris@0: 		    range.max = fabsf(range.max);
Chris@0: 		    range.min = -fabsf(otherChannelRanges[index].max);
Chris@0: 		    range.absmean = (range.absmean +
Chris@0: 				     otherChannelRanges[index].absmean) / 2;
Chris@0: 
Chris@0: 		    if (maxIndex > index && maxIndex < ranges.size()) {
Chris@0: 			// let's not concern ourselves about the mean
Chris@0: 			range.min = std::min
Chris@0: 			    (range.min,
Chris@0: 			     -fabsf(otherChannelRanges[maxIndex].max));
Chris@0: 		    }
Chris@0: 		}
Chris@0: 	    }
Chris@0: 
Chris@0: 	    int greyLevels = 1;
Chris@0: 	    if (m_greyscale && (m_scale == LinearScale)) greyLevels = 4;
Chris@0: 
Chris@0: 	    switch (m_scale) {
Chris@0: 
Chris@0: 	    case LinearScale:
Chris@0: 		rangeBottom = int( m * greyLevels * range.min * m_gain);
Chris@0: 		rangeTop    = int( m * greyLevels * range.max * m_gain);
Chris@0: 		meanBottom  = int(-m * range.absmean * m_gain);
Chris@0: 		meanTop     = int( m * range.absmean * m_gain);
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case dBScale:
Chris@0: 		rangeBottom =  dBscale(range.min * m_gain, m * greyLevels);
Chris@0: 		rangeTop    =  dBscale(range.max * m_gain, m * greyLevels);
Chris@0: 		meanBottom  = -dBscale(range.absmean * m_gain, m);
Chris@0: 		meanTop     =  dBscale(range.absmean * m_gain, m);
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case MeterScale:
Chris@0: 		rangeBottom =  AudioLevel::multiplier_to_preview(range.min * m_gain, m * greyLevels);
Chris@0: 		rangeTop    =  AudioLevel::multiplier_to_preview(range.max * m_gain, m * greyLevels);
Chris@0: 		meanBottom  = -AudioLevel::multiplier_to_preview(range.absmean * m_gain, m);
Chris@0: 		meanTop     =  AudioLevel::multiplier_to_preview(range.absmean * m_gain, m);
Chris@0: 	    }
Chris@0: 
Chris@0: 	    int topFill = (rangeTop < 0 ? -rangeTop : rangeTop) % greyLevels;
Chris@0: 	    int bottomFill = (rangeBottom < 0 ? -rangeBottom : rangeBottom) % greyLevels;
Chris@0: 	    rangeTop = rangeTop / greyLevels;
Chris@0: 	    rangeBottom = rangeBottom / greyLevels;
Chris@0: 
Chris@0: 	    bool clipped = false;
Chris@0: 	    if (rangeTop < -m) { rangeTop = -m; clipped = true; }
Chris@0: 	    if (rangeTop >  m) { rangeTop =  m; clipped = true; }
Chris@0: 	    if (rangeBottom < -m) { rangeBottom = -m; clipped = true; }
Chris@0: 	    if (rangeBottom >  m) { rangeBottom =  m; clipped = true; }
Chris@0: 	    
Chris@0: 	    rangeBottom = my - rangeBottom;
Chris@0: 	    rangeTop    = my - rangeTop;
Chris@0: 	    meanBottom  = my - meanBottom;
Chris@0: 	    meanTop     = my - meanTop;
Chris@0: 
Chris@0: 	    if (meanBottom > rangeBottom) meanBottom = rangeBottom;
Chris@0: 	    if (meanTop < rangeTop) meanTop = rangeTop;
Chris@0: 
Chris@0: 	    bool drawMean = m_showMeans;
Chris@0: 	    if (meanTop == rangeTop) {
Chris@0: 		if (meanTop < meanBottom) ++meanTop;
Chris@0: 		else drawMean = false;
Chris@0: 	    }
Chris@0: 	    if (meanBottom == rangeBottom) {
Chris@0: 		if (meanBottom > meanTop) --meanBottom;
Chris@0: 		else drawMean = false;
Chris@0: 	    }
Chris@0: 
Chris@0: 	    if (x != x0 && prevRangeBottom != -1) {
Chris@0: 		if (prevRangeBottom > rangeBottom &&
Chris@0: 		    prevRangeTop    > rangeBottom) {
Chris@0: 		    paint->setPen(midColour);
Chris@0: 		    paint->drawLine(x-1, prevRangeTop, x, rangeBottom);
Chris@0: 		    paint->setPen(m_colour);
Chris@0: 		    paint->drawPoint(x-1, prevRangeTop);
Chris@0: 		} else if (prevRangeBottom < rangeTop &&
Chris@0: 			   prevRangeTop    < rangeTop) {
Chris@0: 		    paint->setPen(midColour);
Chris@0: 		    paint->drawLine(x-1, prevRangeBottom, x, rangeTop);
Chris@0: 		    paint->setPen(m_colour);
Chris@0: 		    paint->drawPoint(x-1, prevRangeBottom);
Chris@0: 		}
Chris@0: 	    }
Chris@0: 
Chris@0: 	    if (ready) {
Chris@0: 		if (clipped ||
Chris@0: 		    range.min * m_gain <= -1.0 ||
Chris@0: 		    range.max * m_gain >=  1.0) {
Chris@0: 		    paint->setPen(Qt::red);
Chris@0: 		} else {
Chris@0: 		    paint->setPen(m_colour);
Chris@0: 		}
Chris@0: 	    } else {
Chris@0: 		paint->setPen(midColour);
Chris@0: 	    }
Chris@0: 
Chris@0: 	    paint->drawLine(x, rangeBottom, x, rangeTop);
Chris@0: 
Chris@0: 	    if (m_greyscale && (m_scale == LinearScale) && ready) {
Chris@0: 		if (!clipped) {
Chris@0: 		    if (rangeTop < rangeBottom) {
Chris@0: 			if (topFill > 0 &&
Chris@0: 			    (!drawMean || (rangeTop < meanTop - 1))) {
Chris@0: 			    paint->setPen(greys[topFill - 1]);
Chris@0: 			    paint->drawPoint(x, rangeTop - 1);
Chris@0: 			}
Chris@0: 			if (bottomFill > 0 && 
Chris@0: 			    (!drawMean || (rangeBottom > meanBottom + 1))) {
Chris@0: 			    paint->setPen(greys[bottomFill - 1]);
Chris@0: 			    paint->drawPoint(x, rangeBottom + 1);
Chris@0: 			}
Chris@0: 		    }
Chris@0: 		}
Chris@0: 	    }
Chris@0:         
Chris@0: 	    if (drawMean) {
Chris@0: 		paint->setPen(midColour);
Chris@0: 		paint->drawLine(x, meanBottom, x, meanTop);
Chris@0: 	    }
Chris@0:         
Chris@0: 	    prevRangeBottom = rangeBottom;
Chris@0: 	    prevRangeTop = rangeTop;
Chris@0: 	}
Chris@0:     }
Chris@0: 
Chris@0:     if (m_aggressive) {
Chris@0: 	if (ready && rect == m_view->rect()) {
Chris@0: 	    m_cacheValid = true;
Chris@0: 	    m_cacheZoomLevel = zoomLevel;
Chris@0: 	}
Chris@0: 	paint->end();
Chris@0: 	delete paint;
Chris@0: 	viewPainter.drawPixmap(rect, *m_cache, rect);
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::getVerticalScaleWidth(QPainter &paint) const
Chris@0: {
Chris@0:     if (m_scale == LinearScale) {
Chris@0: 	return paint.fontMetrics().width("0.0") + 13;
Chris@0:     } else {
Chris@0: 	return std::max(paint.fontMetrics().width(tr("0dB")),
Chris@0: 			paint.fontMetrics().width(tr("-Inf"))) + 13;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: WaveformLayer::paintVerticalScale(QPainter &paint, QRect rect) const
Chris@0: {
Chris@0:     if (!m_model || !m_model->isOK()) {
Chris@0: 	return;
Chris@0:     }
Chris@0: 
Chris@0:     size_t channels = 0, minChannel = 0, maxChannel = 0;
Chris@0:     bool mergingChannels = false;
Chris@0: 
Chris@0:     channels = getChannelArrangement(minChannel, maxChannel, mergingChannels);
Chris@0:     if (channels == 0) return;
Chris@0: 
Chris@0:     int h = rect.height(), w = rect.width();
Chris@0:     int textHeight = paint.fontMetrics().height();
Chris@0:     int toff = -textHeight/2 + paint.fontMetrics().ascent() + 1;
Chris@0: 
Chris@0:     for (size_t ch = minChannel; ch <= maxChannel; ++ch) {
Chris@0: 
Chris@0: 	int m = (h / channels) / 2;
Chris@0: 	int my = m + (((ch - minChannel) * h) / channels);
Chris@0: 	int py = -1;
Chris@0: 
Chris@0: 	for (int i = 0; i <= 10; ++i) {
Chris@0: 
Chris@0: 	    int vy = 0;
Chris@0: 	    QString text = "";
Chris@0: 
Chris@0: 	    if (m_scale == LinearScale) {
Chris@0: 
Chris@0: 		vy = int((m * i * m_gain) / 10);
Chris@0: 
Chris@0: 		text = QString("%1").arg(float(i) / 10.0);
Chris@0: 		if (i == 0) text = "0.0";
Chris@0: 		if (i == 10) text = "1.0";
Chris@0: 
Chris@0: 	    } else {
Chris@0: 
Chris@0: 		int db;
Chris@0: 		bool minvalue = false;
Chris@0: 		
Chris@0: 		if (m_scale == MeterScale) {
Chris@0: 		    static int dbs[] = { -50, -40, -30, -20, -15,
Chris@0: 					 -10, -5, -3, -2, -1, 0 };
Chris@0: 		    db = dbs[i];
Chris@0: 		    if (db == -50) minvalue = true;
Chris@0: 		    vy = AudioLevel::multiplier_to_preview
Chris@0: 			(AudioLevel::dB_to_multiplier(db) * m_gain, m);
Chris@0: 		} else {
Chris@0: 		    db = -100 + i * 10;
Chris@0: 		    if (db == -100) minvalue = true;
Chris@0: 		    vy = dBscale
Chris@0: 			(AudioLevel::dB_to_multiplier(db) * m_gain, m);
Chris@0: 		}
Chris@0: 
Chris@0: 		text = QString("%1").arg(db);
Chris@0: 		if (db == 0) text = tr("0dB");
Chris@0: 		if (minvalue) {
Chris@0: 		    text = tr("-Inf");
Chris@0: 		    vy = 0;
Chris@0: 		}
Chris@0: 	    }
Chris@0: 
Chris@0: 	    if (vy < 0) vy = -vy;
Chris@0: 	    if (vy >= m - 1) continue;
Chris@0: 
Chris@0: 	    if (py >= 0 && (vy - py) < textHeight - 1) {
Chris@0: 		paint.drawLine(w - 4, my - vy, w, my - vy);
Chris@0: 		if (vy > 0) paint.drawLine(w - 4, my + vy, w, my + vy);
Chris@0: 		continue;
Chris@0: 	    }
Chris@0: 
Chris@0: 	    paint.drawLine(w - 7, my - vy, w, my - vy);
Chris@0: 	    if (vy > 0) paint.drawLine(w - 7, my + vy, w, my + vy);
Chris@0: 
Chris@0: 	    int tx = 3;
Chris@0: 	    if (m_scale != LinearScale) {
Chris@0: 		tx = w - 10 - paint.fontMetrics().width(text);
Chris@0: 	    }
Chris@0: 	    
Chris@0: 	    paint.drawText(tx, my - vy + toff, text);
Chris@0: 	    if (vy > 0) paint.drawText(tx, my + vy + toff, text);
Chris@0: 		
Chris@0: 	    py = vy;
Chris@0: 	}
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@6: QString
Chris@6: WaveformLayer::toXmlString(QString indent, QString extraAttributes) const
Chris@6: {
Chris@6:     QString s;
Chris@6:     
Chris@6:     s += QString("gain=\"%1\" "
Chris@6: 		 "colour=\"%2\" "
Chris@6: 		 "showMeans=\"%3\" "
Chris@6: 		 "greyscale=\"%4\" "
Chris@6: 		 "channelMode=\"%5\" "
Chris@6: 		 "channel=\"%6\" "
Chris@6: 		 "scale=\"%7\" "
Chris@6: 		 "aggressive=\"%8\"")
Chris@6: 	.arg(m_gain)
Chris@6: 	.arg(encodeColour(m_colour))
Chris@6: 	.arg(m_showMeans)
Chris@6: 	.arg(m_greyscale)
Chris@6: 	.arg(m_channelMode)
Chris@6: 	.arg(m_channel)
Chris@6: 	.arg(m_scale)
Chris@6: 	.arg(m_aggressive);
Chris@6: 
Chris@6:     return Layer::toXmlString(indent, extraAttributes + " " + s);
Chris@6: }
Chris@6: 
Chris@11: void
Chris@11: WaveformLayer::setProperties(const QXmlAttributes &attributes)
Chris@11: {
Chris@11:     bool ok = false;
Chris@11: 
Chris@11:     float gain = attributes.value("gain").toFloat(&ok);
Chris@11:     if (ok) setGain(gain);
Chris@11: 
Chris@11:     QString colourSpec = attributes.value("colour");
Chris@11:     if (colourSpec != "") {
Chris@11: 	QColor colour(colourSpec);
Chris@11: 	if (colour.isValid()) {
Chris@11: 	    setBaseColour(QColor(colourSpec));
Chris@11: 	}
Chris@11:     }
Chris@11: 
Chris@11:     bool showMeans = (attributes.value("showMeans") == "1" ||
Chris@11: 		      attributes.value("showMeans") == "true");
Chris@11:     setShowMeans(showMeans);
Chris@11: 
Chris@11:     bool greyscale = (attributes.value("greyscale") == "1" ||
Chris@11: 		      attributes.value("greyscale") == "true");
Chris@11:     setUseGreyscale(greyscale);
Chris@11: 
Chris@11:     ChannelMode channelMode = (ChannelMode)
Chris@11: 	attributes.value("channelMode").toInt(&ok);
Chris@11:     if (ok) setChannelMode(channelMode);
Chris@11: 
Chris@11:     int channel = attributes.value("channel").toInt(&ok);
Chris@11:     if (ok) setChannel(channel);
Chris@11: 
Chris@11:     Scale scale = (Scale)
Chris@11: 	attributes.value("scale").toInt(&ok);
Chris@11:     if (ok) setScale(scale);
Chris@11: 
Chris@11:     bool aggressive = (attributes.value("aggressive") == "1" ||
Chris@11: 		       attributes.value("aggressive") == "true");
Chris@11:     setUseGreyscale(aggressive);
Chris@11: }
Chris@11: 
Chris@0: #ifdef INCLUDE_MOCFILES
Chris@0: #include "WaveformLayer.moc.cpp"
Chris@0: #endif
Chris@0: