Chris@58: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@59:     Sonic Visualiser
Chris@59:     An audio file viewer and annotation editor.
Chris@59:     Centre for Digital Music, Queen Mary, University of London.
Chris@182:     This file copyright 2006 Chris Cannam and QMUL.
Chris@0:    
Chris@59:     This program is free software; you can redistribute it and/or
Chris@59:     modify it under the terms of the GNU General Public License as
Chris@59:     published by the Free Software Foundation; either version 2 of the
Chris@59:     License, or (at your option) any later version.  See the file
Chris@59:     COPYING included with this distribution for more information.
Chris@0: */
Chris@0: 
Chris@0: #include "WaveformLayer.h"
Chris@0: 
Chris@0: #include "base/AudioLevel.h"
Chris@128: #include "view/View.h"
Chris@0: #include "base/Profiler.h"
Chris@167: #include "base/RangeMapper.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@44: WaveformLayer::WaveformLayer() :
Chris@44:     Layer(),
Chris@0:     m_model(0),
Chris@0:     m_gain(1.0f),
Chris@67:     m_autoNormalize(false),
Chris@0:     m_colour(Qt::black),
Chris@189: //    m_colour(QColor(84, 177, 248)),
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@44:     
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@69:     bool channelsChanged = false;
Chris@69:     if (m_channel == -1) {
Chris@69:         if (!m_model) {
Chris@69:             if (model) {
Chris@69:                 channelsChanged = true;
Chris@69:             }
Chris@69:         } else {
Chris@69:             if (model &&
Chris@69:                 m_model->getChannelCount() != model->getChannelCount()) {
Chris@69:                 channelsChanged = true;
Chris@69:             }
Chris@69:         }
Chris@69:     }
Chris@69: 
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@69: 
Chris@69:     if (channelsChanged) emit layerParametersChanged();
Chris@0: }
Chris@0: 
Chris@0: Layer::PropertyList
Chris@0: WaveformLayer::getProperties() const
Chris@0: {
Chris@0:     PropertyList list;
Chris@87:     list.push_back("Colour");
Chris@87:     list.push_back("Scale");
Chris@87:     list.push_back("Gain");
Chris@87:     list.push_back("Normalize Visible Area");
Chris@68: 
Chris@68:     if (m_model && m_model->getChannelCount() > 1 && m_channel == -1) {
Chris@87:         list.push_back("Channels");
Chris@68:     }
Chris@68: 
Chris@0:     return list;
Chris@0: }
Chris@0: 
Chris@87: QString
Chris@87: WaveformLayer::getPropertyLabel(const PropertyName &name) const
Chris@87: {
Chris@87:     if (name == "Colour") return tr("Colour");
Chris@87:     if (name == "Scale") return tr("Scale");
Chris@87:     if (name == "Gain") return tr("Gain");
Chris@87:     if (name == "Normalize Visible Area") return tr("Normalize Visible Area");
Chris@87:     if (name == "Channels") return tr("Channels");
Chris@87:     return "";
Chris@87: }
Chris@87: 
Chris@0: Layer::PropertyType
Chris@0: WaveformLayer::getPropertyType(const PropertyName &name) const
Chris@0: {
Chris@87:     if (name == "Gain") return RangeProperty;
Chris@87:     if (name == "Normalize Visible Area") return ToggleProperty;
Chris@87:     if (name == "Colour") return ValueProperty;
Chris@87:     if (name == "Channels") return ValueProperty;
Chris@87:     if (name == "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@87:     if (name == "Gain" ||
Chris@87:         name == "Normalize Visible Area" ||
Chris@87: 	name == "Scale") return tr("Scale");
Chris@0:     return QString();
Chris@0: }
Chris@0: 
Chris@0: int
Chris@0: WaveformLayer::getPropertyRangeAndValue(const PropertyName &name,
Chris@67:                                         int *min, int *max) const
Chris@0: {
Chris@0:     int deft = 0;
Chris@0: 
Chris@56:     int garbage0, garbage1;
Chris@56:     if (!min) min = &garbage0;
Chris@56:     if (!max) max = &garbage1;
Chris@10: 
Chris@87:     if (name == "Gain") {
Chris@0: 
Chris@0: 	*min = -50;
Chris@0: 	*max = 50;
Chris@0: 
Chris@34: 	deft = lrint(log10(m_gain) * 20.0);
Chris@0: 	if (deft < *min) deft = *min;
Chris@0: 	if (deft > *max) deft = *max;
Chris@0: 
Chris@87:     } else if (name == "Normalize Visible Area") {
Chris@67: 
Chris@67:         deft = (m_autoNormalize ? 1 : 0);
Chris@67: 
Chris@87:     } else if (name == "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@189: 	else if (m_colour == Qt::darkBlue ||
Chris@189:                  m_colour == QColor(84, 177, 248)) 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@87:     } else if (name == "Channels") {
Chris@0: 
Chris@67:         *min = 0;
Chris@67:         *max = 2;
Chris@67:         if (m_channelMode == MixChannels) deft = 1;
Chris@67:         else if (m_channelMode == MergeChannels) deft = 2;
Chris@67:         else deft = 0;
Chris@0: 
Chris@87:     } else if (name == "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@87:     if (name == "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@87:     if (name == "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@87:     if (name == "Channels") {
Chris@67:         switch (value) {
Chris@67:         default:
Chris@67:         case 0: return tr("Separate");
Chris@67:         case 1: return tr("Mean");
Chris@67:         case 2: return tr("Butterfly");
Chris@67:         }
Chris@67:     }
Chris@0:     return tr("<unknown>");
Chris@0: }
Chris@0: 
Chris@167: RangeMapper *
Chris@167: WaveformLayer::getNewPropertyRangeMapper(const PropertyName &name) const
Chris@167: {
Chris@167:     if (name == "Gain") {
Chris@167:         return new LinearRangeMapper(-50, 50, -25, 25, tr("dB"));
Chris@167:     }
Chris@167:     return 0;
Chris@167: }
Chris@167: 
Chris@0: void
Chris@0: WaveformLayer::setProperty(const PropertyName &name, int value)
Chris@0: {
Chris@87:     if (name == "Gain") {
Chris@0: 	setGain(pow(10, float(value)/20.0));
Chris@87:     } else if (name == "Normalize Visible Area") {
Chris@67:         setAutoNormalize(value ? true : false);
Chris@87:     } else if (name == "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@189: //	case 2: setBaseColour(QColor(84, 177, 248)); 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@87:     } else if (name == "Channels") {
Chris@67:         if (value == 1) setChannelMode(MixChannels);
Chris@67:         else if (value == 2) setChannelMode(MergeChannels);
Chris@67:         else setChannelMode(SeparateChannels);
Chris@87:     } else if (name == "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: void
Chris@67: WaveformLayer::setGain(float gain)
Chris@0: {
Chris@0:     if (m_gain == gain) return;
Chris@0:     m_gain = gain;
Chris@0:     m_cacheValid = false;
Chris@0:     emit layerParametersChanged();
Chris@133:     emit verticalZoomChanged();
Chris@0: }
Chris@0: 
Chris@0: void
Chris@67: WaveformLayer::setAutoNormalize(bool autoNormalize)
Chris@67: {
Chris@67:     if (m_autoNormalize == autoNormalize) return;
Chris@67:     m_autoNormalize = autoNormalize;
Chris@67:     m_cacheValid = false;
Chris@67:     emit layerParametersChanged();
Chris@67: }
Chris@67: 
Chris@67: 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@101: //    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@115: WaveformLayer::getCompletion(View *) 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@79: bool
Chris@101: WaveformLayer::getValueExtents(float &min, float &max,
Chris@101:                                bool &log, QString &unit) const
Chris@79: {
Chris@79:     if (m_scale == LinearScale) {
Chris@79:         min = 0.0;
Chris@79:         max = 1.0;
Chris@79:         unit = "V";
Chris@79:     } else if (m_scale == MeterScale) {
Chris@79:         return false; //!!!
Chris@79:     } else {
Chris@79:         min = AudioLevel::multiplier_to_dB(0.0);
Chris@79:         max = AudioLevel::multiplier_to_dB(1.0);
Chris@79:         unit = "dB";
Chris@79:     }
Chris@79:     return true;
Chris@79: }
Chris@79: 
Chris@0: int
Chris@0: WaveformLayer::dBscale(float sample, int m) const
Chris@0: {
Chris@67: //!!!    if (sample < 0.0) return -dBscale(-sample, m);
Chris@67:     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@67: WaveformLayer::getChannelArrangement(size_t &min, size_t &max,
Chris@67:                                      bool &merging, bool &mixing)
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@67: 	if (m_channelMode == MergeChannels ||
Chris@67:             m_channelMode == MixChannels) {
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@67:     mixing = (m_channelMode == MixChannels && 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@67: bool
Chris@67: WaveformLayer::isLayerScrollable(const View *) const
Chris@67: {
Chris@67:     return !m_autoNormalize;
Chris@67: }
Chris@67: 
Chris@68: static float meterdbs[] = { -40, -30, -20, -15, -10,
Chris@68:                             -5, -3, -2, -1, -0.5, 0 };
Chris@68: 
Chris@0: void
Chris@44: WaveformLayer::paint(View *v, QPainter &viewPainter, QRect rect) const
Chris@0: {
Chris@0:     if (!m_model || !m_model->isOK()) {
Chris@0: 	return;
Chris@0:     }
Chris@0:   
Chris@44:     long startFrame = v->getStartFrame();
Chris@44:     int zoomLevel = v->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@67:     bool mergingChannels = false, mixingChannels = false;
Chris@0: 
Chris@67:     channels = getChannelArrangement(minChannel, maxChannel,
Chris@67:                                      mergingChannels, mixingChannels);
Chris@0:     if (channels == 0) return;
Chris@0: 
Chris@44:     int w = v->width();
Chris@44:     int h = v->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@44: 	paint->setBrush(v->palette().background());
Chris@0: 	paint->drawRect(rect);
Chris@0: 
Chris@0: 	paint->setPen(Qt::black);
Chris@0: 	paint->setBrush(Qt::NoBrush);
Chris@0: 
Chris@0:     } else {
Chris@0: 	paint = &viewPainter;
Chris@0:     }
Chris@0: 
Chris@28:     paint->setRenderHint(QPainter::Antialiasing, false);
Chris@28: 
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@28:     if (x0 > 0) --x0;
Chris@44:     if (x1 < v->width()) ++x1;
Chris@28: 
Chris@44:     long frame0 = v->getFrameForX(x0);
Chris@44:     long frame1 = v->getFrameForX(x1 + 1);
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@27: 	for (int i = 0; i < 3; ++i) { // 0 lightest, 2 darkest
Chris@0: 	    int level = 192 - 64 * i;
Chris@0: 	    greys[i] = QColor(level, level, level);
Chris@0: 	}
Chris@0:     } else {
Chris@44: 	int hue, sat, val;
Chris@44: 	m_colour.getHsv(&hue, &sat, &val);
Chris@27: 	for (int i = 0; i < 3; ++i) { // 0 lightest, 2 darkest
Chris@44: 	    if (v->hasLightBackground()) {
Chris@44: 		greys[i] = QColor::fromHsv(hue, sat * (i + 1) / 4, val);
Chris@27: 	    } else {
Chris@44: 		greys[i] = QColor::fromHsv(hue, sat * (3 - i) / 4, val);
Chris@27: 	    }
Chris@27: 	}
Chris@0:     }
Chris@0:         
Chris@0:     QColor midColour = m_colour;
Chris@0:     if (midColour == Qt::black) {
Chris@0: 	midColour = Qt::gray;
Chris@44:     } else if (v->hasLightBackground()) {
Chris@0: 	midColour = midColour.light(150);
Chris@0:     } else {
Chris@0: 	midColour = midColour.light(50);
Chris@0:     }
Chris@0: 
Chris@67:     while (m_effectiveGains.size() <= maxChannel) {
Chris@67:         m_effectiveGains.push_back(m_gain);
Chris@67:     }
Chris@67: 
Chris@0:     for (size_t ch = minChannel; ch <= maxChannel; ++ch) {
Chris@0: 
Chris@0: 	int prevRangeBottom = -1, prevRangeTop = -1;
Chris@28: 	QColor prevRangeBottomColour = m_colour, prevRangeTopColour = m_colour;
Chris@0: 
Chris@67:         m_effectiveGains[ch] = m_gain;
Chris@67: 
Chris@67:         if (m_autoNormalize) {
Chris@67:             RangeSummarisableTimeValueModel::Range range =
Chris@67:                 m_model->getRange(ch, startFrame < 0 ? 0 : startFrame,
Chris@67:                                   v->getEndFrame());
Chris@67:             if (mergingChannels || mixingChannels) {
Chris@67:                 RangeSummarisableTimeValueModel::Range otherRange =
Chris@67:                     m_model->getRange(1, startFrame < 0 ? 0 : startFrame,
Chris@67:                                       v->getEndFrame());
Chris@67:                 range.max = std::max(range.max, otherRange.max);
Chris@67:                 range.min = std::min(range.min, otherRange.min);
Chris@67:                 range.absmean = std::min(range.absmean, otherRange.absmean);
Chris@67:             }
Chris@67:             m_effectiveGains[ch] = 1.0 / std::max(fabsf(range.max),
Chris@67:                                                   fabsf(range.min));
Chris@67:         }
Chris@67: 
Chris@67:         float gain = m_effectiveGains[ch];
Chris@67: 
Chris@68: 	int m = (h / channels) / 2;
Chris@68: 	int my = m + (((ch - minChannel) * h) / channels);
Chris@68: 	
Chris@68: //	std::cerr << "ch = " << ch << ", channels = " << channels << ", m = " << m << ", my = " << my << ", h = " << h << std::endl;
Chris@68: 
Chris@68: 	if (my - m > y1 || my + m < y0) continue;
Chris@68: 
Chris@68:         if ((m_scale == dBScale || m_scale == MeterScale) &&
Chris@68:             m_channelMode != MergeChannels) {
Chris@68:             m = (h / channels);
Chris@68:             my = m + (((ch - minChannel) * h) / channels);
Chris@68:         }
Chris@68: 
Chris@68: 	paint->setPen(greys[0]);
Chris@68: 	paint->drawLine(x0, my, x1, my);
Chris@68: 
Chris@68:         int n = 10;
Chris@68:         int py = -1;
Chris@68:         
Chris@195:         if (v->hasLightBackground() &&
Chris@195:             v->getViewManager() &&
Chris@195:             v->getViewManager()->shouldShowScaleGuides()) {
Chris@68: 
Chris@68:             paint->setPen(QColor(240, 240, 240));
Chris@68: 
Chris@68:             for (int i = 1; i < n; ++i) {
Chris@68:                 
Chris@68:                 float val = 0.0, nval = 0.0;
Chris@68: 
Chris@68:                 switch (m_scale) {
Chris@68: 
Chris@68:                 case LinearScale:
Chris@68:                     val = (i * gain) / n;
Chris@68:                     if (i > 0) nval = -val;
Chris@68:                     break;
Chris@68: 
Chris@68:                 case MeterScale:
Chris@68:                     val = AudioLevel::dB_to_multiplier(meterdbs[i]) * gain;
Chris@68:                     break;
Chris@68: 
Chris@68:                 case dBScale:
Chris@68:                     val = AudioLevel::dB_to_multiplier(-(10*n) + i * 10) * gain;
Chris@68:                     break;
Chris@68:                 }
Chris@68: 
Chris@68:                 if (val < -1.0 || val > 1.0) continue;
Chris@68: 
Chris@68:                 int y = getYForValue(v, m_scale, val, ch, minChannel, maxChannel);
Chris@68: 
Chris@68:                 if (py >= 0 && abs(y - py) < 10) continue;
Chris@68:                 else py = y;
Chris@68: 
Chris@68:                 int ny = y;
Chris@68:                 if (nval != 0.0) {
Chris@68:                     ny = getYForValue(v, m_scale, nval, ch, minChannel, maxChannel);
Chris@68:                 }
Chris@68: 
Chris@68:                 paint->drawLine(x0, y, x1, y);
Chris@68:                 if (ny != y) {
Chris@68:                     paint->drawLine(x0, ny, x1, ny);
Chris@68:                 }
Chris@68:             }
Chris@68:         }
Chris@68: 
Chris@68: 	if (frame1 <= 0) continue;
Chris@68: 
Chris@68: 	size_t modelZoomLevel = zoomLevel;
Chris@68: 
Chris@68: 	ranges = m_model->getRanges
Chris@68: 	    (ch, frame0 < 0 ? 0 : frame0, frame1, modelZoomLevel);
Chris@68:         
Chris@68: 	if (mergingChannels || mixingChannels) {
Chris@71:             if (m_model->getChannelCount() > 1) {
Chris@71:                 otherChannelRanges = m_model->getRanges
Chris@71:                     (1, frame0 < 0 ? 0 : frame0, frame1, modelZoomLevel);
Chris@71:             } else {
Chris@71:                 otherChannelRanges = ranges;
Chris@71:             }
Chris@68: 	}
Chris@68: 
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@67: 
Chris@67: 	    } else if (mixingChannels) {
Chris@67: 
Chris@67: 		if (index < otherChannelRanges.size()) {
Chris@67: 
Chris@67:                     range.max = (range.max + otherChannelRanges[index].max) / 2;
Chris@67:                     range.min = (range.min + otherChannelRanges[index].min) / 2;
Chris@67:                     range.absmean = (range.absmean + otherChannelRanges[index].absmean) / 2;
Chris@67:                 }
Chris@67:             }
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@67: 		rangeBottom = int( m * greyLevels * range.min * gain);
Chris@67: 		rangeTop    = int( m * greyLevels * range.max * gain);
Chris@67: 		meanBottom  = int(-m * range.absmean * gain);
Chris@67: 		meanTop     = int( m * range.absmean * gain);
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case dBScale:
Chris@67:                 if (!mergingChannels) {
Chris@67:                     int db0 = dBscale(range.min * gain, m);
Chris@67:                     int db1 = dBscale(range.max * gain, m);
Chris@67:                     rangeTop    = std::max(db0, db1);
Chris@67:                     meanTop     = std::min(db0, db1);
Chris@67:                     if (mixingChannels) rangeBottom = meanTop;
Chris@67:                     else rangeBottom = dBscale(range.absmean * gain, m);
Chris@67:                     meanBottom  = rangeBottom;
Chris@67:                 } else {
Chris@67:                     rangeBottom = -dBscale(range.min * gain, m * greyLevels);
Chris@67:                     rangeTop    =  dBscale(range.max * gain, m * greyLevels);
Chris@67:                     meanBottom  = -dBscale(range.absmean * gain, m);
Chris@67:                     meanTop     =  dBscale(range.absmean * gain, m);
Chris@67:                 }
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case MeterScale:
Chris@67:                 if (!mergingChannels) {
Chris@67:                     int r0 = abs(AudioLevel::multiplier_to_preview(range.min * gain, m));
Chris@67:                     int r1 = abs(AudioLevel::multiplier_to_preview(range.max * gain, m));
Chris@67:                     rangeTop    = std::max(r0, r1);
Chris@67:                     meanTop     = std::min(r0, r1);
Chris@67:                     if (mixingChannels) rangeBottom = meanTop;
Chris@67:                     else rangeBottom = AudioLevel::multiplier_to_preview(range.absmean * gain, m);
Chris@67:                     meanBottom  = rangeBottom;
Chris@67:                 } else {
Chris@67:                     rangeBottom =  AudioLevel::multiplier_to_preview(range.min * gain, m * greyLevels);
Chris@67:                     rangeTop    =  AudioLevel::multiplier_to_preview(range.max * gain, m * greyLevels);
Chris@67:                     meanBottom  = -AudioLevel::multiplier_to_preview(range.absmean * gain, m);
Chris@67:                     meanTop     =  AudioLevel::multiplier_to_preview(range.absmean * gain, m);
Chris@67:                 }
Chris@67:                 break;
Chris@0: 	    }
Chris@0: 
Chris@27: 	    rangeBottom = my * greyLevels - rangeBottom;
Chris@27: 	    rangeTop    = my * greyLevels - rangeTop;
Chris@27: 	    meanBottom  = my - meanBottom;
Chris@27: 	    meanTop     = my - meanTop;
Chris@27: 
Chris@27: 	    int topFill = (rangeTop % greyLevels);
Chris@27: 	    if (topFill > 0) topFill = greyLevels - topFill;
Chris@27: 
Chris@27: 	    int bottomFill = (rangeBottom % greyLevels);
Chris@27: 
Chris@0: 	    rangeTop = rangeTop / greyLevels;
Chris@0: 	    rangeBottom = rangeBottom / greyLevels;
Chris@0: 
Chris@0: 	    bool clipped = false;
Chris@27: 
Chris@27: 	    if (rangeTop < my - m) { rangeTop = my - m; }
Chris@27: 	    if (rangeTop > my + m) { rangeTop = my + m; }
Chris@27: 	    if (rangeBottom < my - m) { rangeBottom = my - m; }
Chris@27: 	    if (rangeBottom > my + m) { rangeBottom = my + m; }
Chris@27: 
Chris@67: 	    if (range.max <= -1.0 ||
Chris@67: 		range.max >= 1.0) clipped = true;
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@67: 	    if (meanBottom == rangeBottom && m_scale == LinearScale) {
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@28: //		    paint->setPen(midColour);
Chris@28: 		    paint->setPen(m_colour);
Chris@0: 		    paint->drawLine(x-1, prevRangeTop, x, rangeBottom);
Chris@28: 		    paint->setPen(prevRangeTopColour);
Chris@0: 		    paint->drawPoint(x-1, prevRangeTop);
Chris@0: 		} else if (prevRangeBottom < rangeTop &&
Chris@0: 			   prevRangeTop    < rangeTop) {
Chris@28: //		    paint->setPen(midColour);
Chris@28: 		    paint->setPen(m_colour);
Chris@0: 		    paint->drawLine(x-1, prevRangeBottom, x, rangeTop);
Chris@28: 		    paint->setPen(prevRangeBottomColour);
Chris@0: 		    paint->drawPoint(x-1, prevRangeBottom);
Chris@0: 		}
Chris@0: 	    }
Chris@0: 
Chris@0: 	    if (ready) {
Chris@67: 		if (clipped /*!!! ||
Chris@67: 		    range.min * gain <= -1.0 ||
Chris@67: 		    range.max * 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@28: 	    prevRangeTopColour = m_colour;
Chris@28: 	    prevRangeBottomColour = m_colour;
Chris@28: 
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@27: 			    paint->drawPoint(x, rangeTop);
Chris@28: 			    prevRangeTopColour = greys[topFill - 1];
Chris@0: 			}
Chris@0: 			if (bottomFill > 0 && 
Chris@0: 			    (!drawMean || (rangeBottom > meanBottom + 1))) {
Chris@0: 			    paint->setPen(greys[bottomFill - 1]);
Chris@27: 			    paint->drawPoint(x, rangeBottom);
Chris@28: 			    prevRangeBottomColour = greys[bottomFill - 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@41: 
Chris@44: 	if (ready && rect == v->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@25: QString
Chris@44: WaveformLayer::getFeatureDescription(View *v, QPoint &pos) const
Chris@25: {
Chris@25:     int x = pos.x();
Chris@25: 
Chris@25:     if (!m_model || !m_model->isOK()) return "";
Chris@25: 
Chris@44:     long f0 = v->getFrameForX(x);
Chris@44:     long f1 = v->getFrameForX(x + 1);
Chris@25: 
Chris@25:     if (f0 < 0) f0 = 0;
Chris@25:     if (f1 <= f0) return "";
Chris@25:     
Chris@25:     QString text;
Chris@25: 
Chris@25:     RealTime rt0 = RealTime::frame2RealTime(f0, m_model->getSampleRate());
Chris@25:     RealTime rt1 = RealTime::frame2RealTime(f1, m_model->getSampleRate());
Chris@25: 
Chris@25:     if (f1 != f0 + 1 && (rt0.sec != rt1.sec || rt0.msec() != rt1.msec())) {
Chris@25: 	text += tr("Time:\t%1 - %2")
Chris@25: 	    .arg(rt0.toText(true).c_str())
Chris@25: 	    .arg(rt1.toText(true).c_str());
Chris@25:     } else {
Chris@25: 	text += tr("Time:\t%1")
Chris@25: 	    .arg(rt0.toText(true).c_str());
Chris@25:     }
Chris@25: 
Chris@25:     size_t channels = 0, minChannel = 0, maxChannel = 0;
Chris@67:     bool mergingChannels = false, mixingChannels = false;
Chris@25: 
Chris@67:     channels = getChannelArrangement(minChannel, maxChannel,
Chris@67:                                      mergingChannels, mixingChannels);
Chris@25:     if (channels == 0) return "";
Chris@25: 
Chris@25:     for (size_t ch = minChannel; ch <= maxChannel; ++ch) {
Chris@25: 
Chris@44: 	size_t blockSize = v->getZoomLevel();
Chris@25: 	RangeSummarisableTimeValueModel::RangeBlock ranges =
Chris@25: 	    m_model->getRanges(ch, f0, f1, blockSize);
Chris@25: 
Chris@25: 	if (ranges.empty()) continue;
Chris@25: 	
Chris@25: 	RangeSummarisableTimeValueModel::Range range = ranges[0];
Chris@25: 	
Chris@25: 	QString label = tr("Level:");
Chris@25: 	if (minChannel != maxChannel) {
Chris@25: 	    if (ch == 0) label = tr("Left:");
Chris@25: 	    else if (ch == 1) label = tr("Right:");
Chris@25: 	    else label = tr("Channel %1").arg(ch + 1);
Chris@25: 	}
Chris@25: 
Chris@76:         bool singleValue = false;
Chris@76:         float min, max;
Chris@76: 
Chris@76:         if (fabs(range.min) < 0.01) {
Chris@76:             min = range.min;
Chris@76:             max = range.max;
Chris@76:             singleValue = (min == max);
Chris@76:         } else {
Chris@76:             int imin = int(range.min * 1000);
Chris@76:             int imax = int(range.max * 1000);
Chris@76:             singleValue = (imin == imax);
Chris@76:             min = float(imin)/1000;
Chris@76:             max = float(imax)/1000;
Chris@76:         }
Chris@76: 
Chris@25: 	int db = int(AudioLevel::multiplier_to_dB(std::max(fabsf(range.min),
Chris@25: 							   fabsf(range.max)))
Chris@25: 		     * 100);
Chris@25: 
Chris@76: 	if (!singleValue) {
Chris@25: 	    text += tr("\n%1\t%2 - %3 (%4 dB peak)")
Chris@76: 		.arg(label).arg(min).arg(max).arg(float(db)/100);
Chris@25: 	} else {
Chris@25: 	    text += tr("\n%1\t%2 (%3 dB peak)")
Chris@76: 		.arg(label).arg(min).arg(float(db)/100);
Chris@25: 	}
Chris@25:     }
Chris@25: 
Chris@25:     return text;
Chris@25: }
Chris@25: 
Chris@0: int
Chris@68: WaveformLayer::getYForValue(View *v, Scale scale, float value, size_t channel,
Chris@68:                             size_t minChannel, size_t maxChannel) const
Chris@68: {
Chris@68:     if (maxChannel < minChannel || channel < minChannel) return 0;
Chris@68: 
Chris@68:     int w = v->width();
Chris@68:     int h = v->height();
Chris@68: 
Chris@68:     int channels = maxChannel - minChannel + 1;
Chris@68:     int m = (h / channels) / 2;
Chris@68:     int my = m + (((channel - minChannel) * h) / channels);
Chris@68: 	
Chris@68:     if ((m_scale == dBScale || m_scale == MeterScale) &&
Chris@68:         m_channelMode != MergeChannels) {
Chris@68:         m = (h / channels);
Chris@68:         my = m + (((channel - minChannel) * h) / channels);
Chris@68:     }
Chris@68: 
Chris@68:     int vy = 0;
Chris@68: 
Chris@68:     switch (scale) {
Chris@68: 
Chris@68:     case LinearScale:
Chris@68:         vy = int(m * value);
Chris@68:         break;
Chris@68: 
Chris@68:     case MeterScale:
Chris@68:         vy = AudioLevel::multiplier_to_preview(value, m);
Chris@68:         break;
Chris@68: 
Chris@68:     case dBScale:
Chris@68:         vy = dBscale(value, m);
Chris@68:         break;
Chris@68:     }
Chris@68: 
Chris@68:     return my - vy;
Chris@68: }
Chris@68: 
Chris@68: int
Chris@44: WaveformLayer::getVerticalScaleWidth(View *v, 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@44: WaveformLayer::paintVerticalScale(View *v, 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@67:     bool mergingChannels = false, mixingChannels = false;
Chris@0: 
Chris@67:     channels = getChannelArrangement(minChannel, maxChannel,
Chris@67:                                      mergingChannels, mixingChannels);
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@67:     float gain = m_gain;
Chris@67: 
Chris@0:     for (size_t ch = minChannel; ch <= maxChannel; ++ch) {
Chris@0: 
Chris@68: 	int lastLabelledY = -1;
Chris@0: 
Chris@67:         if (ch < m_effectiveGains.size()) gain = m_effectiveGains[ch];
Chris@67: 
Chris@68:         int n = 10;
Chris@0: 
Chris@68: 	for (int i = 0; i <= n; ++i) {
Chris@68: 
Chris@68:             float val = 0.0, nval = 0.0;
Chris@0: 	    QString text = "";
Chris@0: 
Chris@68:             switch (m_scale) {
Chris@68:                 
Chris@68:             case LinearScale:
Chris@68:                 val = (i * gain) / n;
Chris@68: 		text = QString("%1").arg(float(i) / n);
Chris@68: 		if (i == 0) text = "0.0";
Chris@68:                 else {
Chris@68:                     nval = -val;
Chris@68:                     if (i == n) text = "1.0";
Chris@68:                 }
Chris@68:                 break;
Chris@0: 
Chris@68:             case MeterScale:
Chris@68:                 val = AudioLevel::dB_to_multiplier(meterdbs[i]) * gain;
Chris@68: 		text = QString("%1").arg(meterdbs[i]);
Chris@68: 		if (i == n) text = tr("0dB");
Chris@68: 		if (i == 0) {
Chris@68:                     text = tr("-Inf");
Chris@68:                     val = 0.0;
Chris@68: 		}
Chris@68:                 break;
Chris@0: 
Chris@68:             case dBScale:
Chris@68:                 val = AudioLevel::dB_to_multiplier(-(10*n) + i * 10) * gain;
Chris@68: 		text = QString("%1").arg(-(10*n) + i * 10);
Chris@68: 		if (i == n) text = tr("0dB");
Chris@68: 		if (i == 0) {
Chris@68:                     text = tr("-Inf");
Chris@68:                     val = 0.0;
Chris@68: 		}
Chris@68:                 break;
Chris@68:             }
Chris@0: 
Chris@68:             if (val < -1.0 || val > 1.0) continue;
Chris@0: 
Chris@68:             int y = getYForValue(v, m_scale, val, ch, minChannel, maxChannel);
Chris@0: 
Chris@68:             int ny = y;
Chris@68:             if (nval != 0.0) {
Chris@68:                 ny = getYForValue(v, m_scale, nval, ch, minChannel, maxChannel);
Chris@68:             }
Chris@0: 
Chris@68:             bool spaceForLabel = (i == 0 ||
Chris@68:                                   abs(y - lastLabelledY) >= textHeight - 1);
Chris@0: 
Chris@68:             if (spaceForLabel) {
Chris@0: 
Chris@68:                 int tx = 3;
Chris@68:                 if (m_scale != LinearScale) {
Chris@68:                     tx = w - 10 - paint.fontMetrics().width(text);
Chris@68:                 }
Chris@68:                   
Chris@68:                 int ty = y;
Chris@68:                 if (ty < paint.fontMetrics().ascent()) {
Chris@68:                     ty = paint.fontMetrics().ascent();
Chris@68:                 } else if (ty > h - paint.fontMetrics().descent()) {
Chris@68:                     ty = h - paint.fontMetrics().descent();
Chris@68:                 } else {
Chris@68:                     ty += toff;
Chris@68:                 }
Chris@68:                 paint.drawText(tx, ty, text);
Chris@0: 
Chris@68:                 lastLabelledY = ty - toff;
Chris@67: 
Chris@68:                 if (ny != y) {
Chris@68:                     ty = ny;
Chris@68:                     if (ty < paint.fontMetrics().ascent()) {
Chris@68:                         ty = paint.fontMetrics().ascent();
Chris@68:                     } else if (ty > h - paint.fontMetrics().descent()) {
Chris@68:                         ty = h - paint.fontMetrics().descent();
Chris@68:                     } else {
Chris@68:                         ty += toff;
Chris@68:                     }
Chris@68:                     paint.drawText(tx, ty, text);
Chris@68:                 }
Chris@68: 
Chris@68:                 paint.drawLine(w - 7, y, w, y);
Chris@68:                 if (ny != y) paint.drawLine(w - 7, ny, w, ny);
Chris@68: 
Chris@68:             } else {
Chris@68: 
Chris@68:                 paint.drawLine(w - 4, y, w, y);
Chris@68:                 if (ny != y) paint.drawLine(w - 4, ny, w, ny);
Chris@68:             }
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@67: 		 "aggressive=\"%8\" "
Chris@67:                  "autoNormalize=\"%9\"")
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@67: 	.arg(m_aggressive)
Chris@67:         .arg(m_autoNormalize);
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@67: 
Chris@67:     bool autoNormalize = (attributes.value("autoNormalize") == "1" ||
Chris@67:                           attributes.value("autoNormalize") == "true");
Chris@67:     setAutoNormalize(autoNormalize);
Chris@11: }
Chris@11: 
Chris@133: int
Chris@133: WaveformLayer::getVerticalZoomSteps(int &defaultStep) const
Chris@133: {
Chris@133:     defaultStep = 50;
Chris@133:     return 100;
Chris@133: }
Chris@0: 
Chris@133: int
Chris@133: WaveformLayer::getCurrentVerticalZoomStep() const
Chris@133: {
Chris@133:     int val = lrint(log10(m_gain) * 20.0) + 50;
Chris@133:     if (val < 0) val = 0;
Chris@133:     if (val > 100) val = 100;
Chris@133:     return val;
Chris@133: }
Chris@133: 
Chris@133: void
Chris@133: WaveformLayer::setVerticalZoomStep(int step)
Chris@133: {
Chris@133:     setGain(pow(10, float(step - 50) / 20.0));
Chris@133: }
Chris@133: