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@376: #include "ColourDatabase.h"
Chris@0: 
Chris@0: #include <QPainter>
Chris@0: #include <QPixmap>
Chris@316: #include <QTextStream>
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@287:     SingleColourLayer(),
Chris@0:     m_model(0),
Chris@0:     m_gain(1.0f),
Chris@67:     m_autoNormalize(false),
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@320:     connectSignals(m_model);
Chris@301: 
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@287:     PropertyList list = SingleColourLayer::getProperties();
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 == "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@287:     return SingleColourLayer::getPropertyLabel(name);
Chris@87: }
Chris@87: 
Chris@335: QString
Chris@335: WaveformLayer::getPropertyIconName(const PropertyName &name) const
Chris@335: {
Chris@335:     if (name == "Normalize Visible Area") return "normalise";
Chris@335:     return "";
Chris@335: }
Chris@335: 
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 == "Channels") return ValueProperty;
Chris@87:     if (name == "Scale") return ValueProperty;
Chris@287:     return SingleColourLayer::getPropertyType(name);
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@216:                                         int *min, int *max, int *deflt) const
Chris@0: {
Chris@216:     int val = 0;
Chris@0: 
Chris@216:     int garbage0, garbage1, garbage2;
Chris@56:     if (!min) min = &garbage0;
Chris@56:     if (!max) max = &garbage1;
Chris@216:     if (!deflt) deflt = &garbage2;
Chris@10: 
Chris@87:     if (name == "Gain") {
Chris@0: 
Chris@0: 	*min = -50;
Chris@0: 	*max = 50;
Chris@216:         *deflt = 0;
Chris@0: 
Chris@216: 	val = lrint(log10(m_gain) * 20.0);
Chris@216: 	if (val < *min) val = *min;
Chris@216: 	if (val > *max) val = *max;
Chris@0: 
Chris@87:     } else if (name == "Normalize Visible Area") {
Chris@67: 
Chris@216:         val = (m_autoNormalize ? 1 : 0);
Chris@216:         *deflt = 0;
Chris@67: 
Chris@87:     } else if (name == "Channels") {
Chris@0: 
Chris@67:         *min = 0;
Chris@67:         *max = 2;
Chris@216:         *deflt = 0;
Chris@216:         if (m_channelMode == MixChannels) val = 1;
Chris@216:         else if (m_channelMode == MergeChannels) val = 2;
Chris@216:         else val = 0;
Chris@0: 
Chris@87:     } else if (name == "Scale") {
Chris@0: 
Chris@0: 	*min = 0;
Chris@0: 	*max = 2;
Chris@216:         *deflt = 0;
Chris@0: 
Chris@216: 	val = (int)m_scale;
Chris@0: 
Chris@0:     } else {
Chris@287: 	val = SingleColourLayer::getPropertyRangeAndValue(name, min, max, deflt);
Chris@0:     }
Chris@0: 
Chris@216:     return val;
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 == "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@287:     return SingleColourLayer::getPropertyValueLabel(name, value);
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 == "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@287:     } else {
Chris@287:         SingleColourLayer::setProperty(name, value);
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::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@587: //    SVDEBUG << "WaveformLayer::setChannel(" << channel << ")" << 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@248:                                bool &, 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@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@587: //    SVDEBUG << "WaveformLayer::getChannelArrangement: min " << min << ", max " << max << ", merging " << merging << ", channels " << channels << 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@365: bool
Chris@365: WaveformLayer::getSourceFramesForX(View *v, int x, size_t modelZoomLevel,
Chris@365:                                    size_t &f0, size_t &f1) const
Chris@365: {
Chris@365:     long viewFrame = v->getFrameForX(x);
Chris@365:     if (viewFrame < 0) {
Chris@365:         f0 = 0;
Chris@365:         f1 = 0;
Chris@365:         return false;
Chris@365:     }
Chris@365: 
Chris@365:     f0 = viewFrame;
Chris@365:     
Chris@365:     f0 = f0 / modelZoomLevel;
Chris@365:     f0 = f0 * modelZoomLevel;
Chris@365: 
Chris@365:     viewFrame = v->getFrameForX(x + 1);
Chris@365:     
Chris@365:     f1 = viewFrame;
Chris@365:     f1 = f1 / modelZoomLevel;
Chris@365:     f1 = f1 * modelZoomLevel;
Chris@365:     
Chris@365:     return (f0 < m_model->getEndFrame());
Chris@365: }
Chris@365: 
Chris@365: float
Chris@365: WaveformLayer::getNormalizeGain(View *v, int channel) const
Chris@365: {
Chris@365:     long startFrame = v->getStartFrame();
Chris@365:     long endFrame = v->getEndFrame();
Chris@365: 
Chris@365:     // Although a long for purposes of comparison against the view
Chris@365:     // start and end frames, these are known to be non-negative
Chris@365:     long modelStart = long(m_model->getStartFrame());
Chris@365:     long modelEnd = long(m_model->getEndFrame());
Chris@365:     
Chris@365:     size_t rangeStart, rangeEnd;
Chris@365:             
Chris@365:     if (startFrame < modelStart) rangeStart = modelStart;
Chris@365:     else rangeStart = startFrame;
Chris@365: 
Chris@365:     if (endFrame < 0) rangeEnd = 0;
Chris@365:     else if (endFrame > modelEnd) rangeEnd = modelEnd;
Chris@365:     else rangeEnd = endFrame;
Chris@365: 
Chris@365:     if (rangeEnd < rangeStart) rangeEnd = rangeStart;
Chris@365: 
Chris@365:     RangeSummarisableTimeValueModel::Range range =
Chris@365:         m_model->getSummary(channel, rangeStart, rangeEnd - rangeStart);
Chris@365: 
Chris@365:     size_t minChannel = 0, maxChannel = 0;
Chris@365:     bool mergingChannels = false, mixingChannels = false;
Chris@365: 
Chris@365:     getChannelArrangement(minChannel, maxChannel,
Chris@365:                           mergingChannels, mixingChannels);
Chris@365: 
Chris@365:     if (mergingChannels || mixingChannels) {
Chris@365:         RangeSummarisableTimeValueModel::Range otherRange =
Chris@365:             m_model->getSummary(1, rangeStart, rangeEnd - rangeStart);
Chris@386:         range.setMax(std::max(range.max(), otherRange.max()));
Chris@386:         range.setMin(std::min(range.min(), otherRange.min()));
Chris@386:         range.setAbsmean(std::min(range.absmean(), otherRange.absmean()));
Chris@365:     }
Chris@365: 
Chris@386:     return 1.0 / std::max(fabsf(range.max()), fabsf(range.min()));
Chris@365: }
Chris@365: 
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:     int zoomLevel = v->getZoomLevel();
Chris@0: 
Chris@2: #ifdef DEBUG_WAVEFORM_PAINT
Chris@0:     Profiler profiler("WaveformLayer::paint", true);
Chris@612:     std::cerr << "WaveformLayer::paint (" << rect.x() << "," << rect.y()
Chris@612: 	      << ") [" << rect.width() << "x" << rect.height() << "]: zoom " << zoomLevel << 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@214: #ifdef DEBUG_WAVEFORM_PAINT
Chris@612:         std::cerr << "WaveformLayer::paint: aggressive is true" << endl;
Chris@214: #endif
Chris@214: 
Chris@0: 	if (m_cacheValid && (zoomLevel != m_cacheZoomLevel)) {
Chris@0: 	    m_cacheValid = false;
Chris@0: 	}
Chris@0: 
Chris@214: 	if (!m_cache || m_cache->width() != w || m_cache->height() != h) {
Chris@214: #ifdef DEBUG_WAVEFORM_PAINT
Chris@214:             if (m_cache) {
Chris@612:                 std::cerr << "WaveformLayer::paint: cache size " << m_cache->width() << "x" << m_cache->height() << " differs from view size " << w << "x" << h << ": regenerating aggressive cache" << endl;
Chris@214:             }
Chris@214: #endif
Chris@214: 	    delete m_cache;
Chris@214: 	    m_cache = new QPixmap(w, h);
Chris@214:             m_cacheValid = false;
Chris@214: 	}
Chris@214: 
Chris@0: 	if (m_cacheValid) {
Chris@0: 	    viewPainter.drawPixmap(rect, *m_cache, rect);
Chris@0: 	    return;
Chris@0: 	}
Chris@0: 
Chris@0: 	paint = new QPainter(m_cache);
Chris@0: 
Chris@0: 	paint->setPen(Qt::NoPen);
Chris@287: 	paint->setBrush(getBackgroundQColor(v));
Chris@0: 	paint->drawRect(rect);
Chris@0: 
Chris@287: 	paint->setPen(getForegroundQColor(v));
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@365:     // Our zoom level may differ from that at which the underlying
Chris@365:     // model has its blocks.
Chris@302: 
Chris@365:     // Each pixel within our visible range must always draw from
Chris@365:     // exactly the same set of underlying audio frames, no matter what
Chris@365:     // the range being drawn is.  And that set of underlying frames
Chris@365:     // must remain the same when we scroll one or more pixels left or
Chris@365:     // right.
Chris@365:             
Chris@365:     size_t modelZoomLevel = m_model->getSummaryBlockSize(zoomLevel);
Chris@365: 
Chris@365:     size_t frame0;
Chris@365:     size_t frame1;
Chris@365:     size_t spare;
Chris@365: 
Chris@365:     getSourceFramesForX(v, x0, modelZoomLevel, frame0, spare);
Chris@365:     getSourceFramesForX(v, x1, modelZoomLevel, spare, frame1);
Chris@365:     
Chris@4: #ifdef DEBUG_WAVEFORM_PAINT
Chris@612:     std::cerr << "Painting waveform from " << frame0 << " to " << frame1 << " (" << (x1-x0+1) << " pixels at zoom " << zoomLevel << " and model zoom " << modelZoomLevel << ")" <<  std::endl;
Chris@4: #endif
Chris@0: 
Chris@200:     RangeSummarisableTimeValueModel::RangeBlock *ranges = 
Chris@200:         new RangeSummarisableTimeValueModel::RangeBlock;
Chris@200: 
Chris@200:     RangeSummarisableTimeValueModel::RangeBlock *otherChannelRanges = 0;
Chris@0:     RangeSummarisableTimeValueModel::Range range;
Chris@287: 
Chris@287:     QColor baseColour = getBaseQColor();
Chris@287:     std::vector<QColor> greys = getPartialShades(v);
Chris@0:         
Chris@285:     QColor midColour = baseColour;
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@285: 	QColor prevRangeBottomColour = baseColour, prevRangeTopColour = baseColour;
Chris@0: 
Chris@67:         m_effectiveGains[ch] = m_gain;
Chris@67: 
Chris@67:         if (m_autoNormalize) {
Chris@365:             m_effectiveGains[ch] = getNormalizeGain(v, ch);
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@612: 
Chris@612: #ifdef DEBUG_WAVEFORM_PAINT	
Chris@612: 	std::cerr << "ch = " << ch << ", channels = " << channels << ", m = " << m << ", my = " << my << ", h = " << h << std::endl;
Chris@612: #endif
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@295: 	paint->setPen(greys[1]);
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@274:                 int y = getYForValue(v, val, ch);
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@274:                     ny = getYForValue(v, nval, ch);
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@365:   
Chris@365:         m_model->getSummaries(ch, frame0, frame1 - frame0,
Chris@365:                               *ranges, modelZoomLevel);
Chris@68: 
Chris@365: #ifdef DEBUG_WAVEFORM_PAINT
Chris@365:         std::cerr << ranges->size() << " ranges from " << frame0 << " to " << frame1 << std::endl;
Chris@365: #endif
Chris@68: 
Chris@68: 	if (mergingChannels || mixingChannels) {
Chris@71:             if (m_model->getChannelCount() > 1) {
Chris@200:                 if (!otherChannelRanges) {
Chris@200:                     otherChannelRanges =
Chris@200:                         new RangeSummarisableTimeValueModel::RangeBlock;
Chris@200:                 }
Chris@302:                 m_model->getSummaries
Chris@365:                     (1, frame0, frame1 - frame0, *otherChannelRanges,
Chris@200:                      modelZoomLevel);
Chris@71:             } else {
Chris@200:                 if (otherChannelRanges != ranges) delete otherChannelRanges;
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: 
Chris@365:             size_t f0, f1;
Chris@365:             if (!getSourceFramesForX(v, x, modelZoomLevel, f0, f1)) continue;
Chris@365:             f1 = f1 - 1;
Chris@365: 
Chris@365:             if (f0 < frame0) {
Chris@365:                 std::cerr << "ERROR: WaveformLayer::paint: pixel " << x << " has f0 = " << f0 << " which is less than range frame0 " << frame0 << " for x0 = " << x0 << std::endl;
Chris@365:                 continue;
Chris@302:             }
Chris@0: 
Chris@365:             size_t i0 = (f0 - frame0) / modelZoomLevel;
Chris@365:             size_t i1 = (f1 - frame0) / modelZoomLevel;
Chris@362: 
Chris@365: #ifdef DEBUG_WAVEFORM_PAINT
Chris@612:             std::cerr << "WaveformLayer::paint: pixel " << x << ": i0 " << i0 << " (f " << f0 << "), i1 " << i1 << " (f " << f1 << ")" << std::endl;
Chris@365: #endif
Chris@0: 
Chris@365:             if (i1 > i0 + 1) {
Chris@612:                 std::cerr << "WaveformLayer::paint: ERROR: i1 " << i1 << " > i0 " << i0 << " plus one (zoom = " << zoomLevel << ", model zoom = " << modelZoomLevel << ")" << std::endl;
Chris@365:             }
Chris@362: 
Chris@365: 	    if (ranges && i0 < ranges->size()) {
Chris@362: 
Chris@365: 		range = (*ranges)[i0];
Chris@0: 
Chris@365: 		if (i1 > i0 && i1 < ranges->size()) {
Chris@386: 		    range.setMax(std::max(range.max(), (*ranges)[i1].max()));
Chris@386: 		    range.setMin(std::min(range.min(), (*ranges)[i1].min()));
Chris@386: 		    range.setAbsmean((range.absmean() + (*ranges)[i1].absmean()) / 2);
Chris@0: 		}
Chris@0: 
Chris@0: 	    } else {
Chris@612: #ifdef DEBUG_WAVEFORM_PAINT
Chris@612:                 std::cerr << "No (or not enough) ranges for i0 = " << i0 << std::endl;
Chris@612: #endif
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@365: 		if (otherChannelRanges && i0 < otherChannelRanges->size()) {
Chris@0: 
Chris@386: 		    range.setMax(fabsf(range.max()));
Chris@386: 		    range.setMin(-fabsf((*otherChannelRanges)[i0].max()));
Chris@386: 		    range.setAbsmean
Chris@386:                         ((range.absmean() +
Chris@386:                           (*otherChannelRanges)[i0].absmean()) / 2);
Chris@0: 
Chris@365: 		    if (i1 > i0 && i1 < otherChannelRanges->size()) {
Chris@0: 			// let's not concern ourselves about the mean
Chris@386: 			range.setMin
Chris@386:                             (std::min
Chris@386:                              (range.min(),
Chris@386:                               -fabsf((*otherChannelRanges)[i1].max())));
Chris@0: 		    }
Chris@0: 		}
Chris@67: 
Chris@67: 	    } else if (mixingChannels) {
Chris@67: 
Chris@365: 		if (otherChannelRanges && i0 < otherChannelRanges->size()) {
Chris@67: 
Chris@386:                     range.setMax((range.max() + (*otherChannelRanges)[i0].max()) / 2);
Chris@386:                     range.setMin((range.min() + (*otherChannelRanges)[i0].min()) / 2);
Chris@386:                     range.setAbsmean((range.absmean() + (*otherChannelRanges)[i0].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@386: 		rangeBottom = int( m * greyLevels * range.min() * gain);
Chris@386: 		rangeTop    = int( m * greyLevels * range.max() * gain);
Chris@386: 		meanBottom  = int(-m * range.absmean() * gain);
Chris@386: 		meanTop     = int( m * range.absmean() * gain);
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case dBScale:
Chris@67:                 if (!mergingChannels) {
Chris@386:                     int db0 = dBscale(range.min() * gain, m);
Chris@386:                     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@386:                     else rangeBottom = dBscale(range.absmean() * gain, m);
Chris@67:                     meanBottom  = rangeBottom;
Chris@67:                 } else {
Chris@386:                     rangeBottom = -dBscale(range.min() * gain, m * greyLevels);
Chris@386:                     rangeTop    =  dBscale(range.max() * gain, m * greyLevels);
Chris@386:                     meanBottom  = -dBscale(range.absmean() * gain, m);
Chris@386:                     meanTop     =  dBscale(range.absmean() * gain, m);
Chris@67:                 }
Chris@0: 		break;
Chris@0: 
Chris@0: 	    case MeterScale:
Chris@67:                 if (!mergingChannels) {
Chris@386:                     int r0 = abs(AudioLevel::multiplier_to_preview(range.min() * gain, m));
Chris@386:                     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@386:                     else rangeBottom = AudioLevel::multiplier_to_preview(range.absmean() * gain, m);
Chris@67:                     meanBottom  = rangeBottom;
Chris@67:                 } else {
Chris@386:                     rangeBottom = -AudioLevel::multiplier_to_preview(range.min() * gain, m * greyLevels);
Chris@386:                     rangeTop    =  AudioLevel::multiplier_to_preview(range.max() * gain, m * greyLevels);
Chris@386:                     meanBottom  = -AudioLevel::multiplier_to_preview(range.absmean() * gain, m);
Chris@386:                     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@386: 	    if (range.max() <= -1.0 ||
Chris@386: 		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@285: 		    paint->setPen(baseColour);
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@285: 		    paint->setPen(baseColour);
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@386: 		    range.min() * gain <= -1.0 ||
Chris@386: 		    range.max() * gain >=  1.0 */) {
Chris@285: 		    paint->setPen(Qt::red); //!!! getContrastingColour
Chris@0: 		} else {
Chris@285: 		    paint->setPen(baseColour);
Chris@0: 		}
Chris@0: 	    } else {
Chris@0: 		paint->setPen(midColour);
Chris@0: 	    }
Chris@0: 
Chris@612: #ifdef DEBUG_WAVEFORM_PAINT
Chris@612:             std::cerr << "range " << rangeBottom << " -> " << rangeTop << std::endl;
Chris@612: #endif
Chris@612: 
Chris@612:             if (rangeTop == rangeBottom) {
Chris@612:                 paint->drawPoint(x, rangeTop);
Chris@612:             } else {
Chris@612:                 paint->drawLine(x, rangeBottom, x, rangeTop);
Chris@612:             }
Chris@0: 
Chris@285: 	    prevRangeTopColour = baseColour;
Chris@285: 	    prevRangeBottomColour = baseColour;
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@200: 
Chris@200:     if (otherChannelRanges != ranges) delete otherChannelRanges;
Chris@200:     delete ranges;
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@365:     int zoomLevel = v->getZoomLevel();
Chris@25: 
Chris@365:     size_t modelZoomLevel = m_model->getSummaryBlockSize(zoomLevel);
Chris@365: 
Chris@365:     size_t f0, f1;
Chris@365:     if (!getSourceFramesForX(v, x, modelZoomLevel, f0, f1)) 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@675:     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@675:     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@200: 	RangeSummarisableTimeValueModel::RangeBlock ranges;
Chris@302:         m_model->getSummaries(ch, f0, f1 - f0, ranges, 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@386:         if (fabs(range.min()) < 0.01) {
Chris@386:             min = range.min();
Chris@386:             max = range.max();
Chris@76:             singleValue = (min == max);
Chris@76:         } else {
Chris@386:             int imin = int(range.min() * 1000);
Chris@386:             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@386: 	int db = int(AudioLevel::multiplier_to_dB(std::max(fabsf(range.min()),
Chris@386: 							   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@274: WaveformLayer::getYForValue(const View *v, float value, size_t channel) const
Chris@68: {
Chris@274:     size_t channels = 0, minChannel = 0, maxChannel = 0;
Chris@274:     bool mergingChannels = false, mixingChannels = false;
Chris@274: 
Chris@274:     channels = getChannelArrangement(minChannel, maxChannel,
Chris@274:                                      mergingChannels, mixingChannels);
Chris@274: 
Chris@68:     if (maxChannel < minChannel || channel < minChannel) return 0;
Chris@68: 
Chris@68:     int h = v->height();
Chris@68:     int m = (h / channels) / 2;
Chris@68: 	
Chris@68:     if ((m_scale == dBScale || m_scale == MeterScale) &&
Chris@68:         m_channelMode != MergeChannels) {
Chris@68:         m = (h / channels);
Chris@68:     }
Chris@68: 
Chris@274:     int my = m + (((channel - minChannel) * h) / channels);
Chris@274: 
Chris@68:     int vy = 0;
Chris@68: 
Chris@274:     switch (m_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@324: //    std::cerr << "mergingChannels= " << mergingChannels << ", channel  = " << channel << ", value = " << value << ", vy = " << vy << std::endl;
Chris@324: 
Chris@68:     return my - vy;
Chris@68: }
Chris@68: 
Chris@261: float
Chris@274: WaveformLayer::getValueForY(const View *v, int y, size_t &channel) const
Chris@261: {
Chris@274:     size_t channels = 0, minChannel = 0, maxChannel = 0;
Chris@274:     bool mergingChannels = false, mixingChannels = false;
Chris@274: 
Chris@274:     channels = getChannelArrangement(minChannel, maxChannel,
Chris@274:                                      mergingChannels, mixingChannels);
Chris@274: 
Chris@261:     if (maxChannel < minChannel) return 0;
Chris@261: 
Chris@261:     int h = v->height();
Chris@261:     int m = (h / channels) / 2;
Chris@261: 
Chris@261:     if ((m_scale == dBScale || m_scale == MeterScale) &&
Chris@261:         m_channelMode != MergeChannels) {
Chris@261:         m = (h / channels);
Chris@261:     }
Chris@274:   
Chris@274:     channel = (y * channels) / h + minChannel;
Chris@261: 
Chris@261:     int my = m + (((channel - minChannel) * h) / channels);
Chris@261: 
Chris@262:     int vy = my - y;
Chris@261:     float value = 0;
Chris@274:     float thresh = -50.f;
Chris@261: 
Chris@274:     switch (m_scale) {
Chris@261: 
Chris@261:     case LinearScale:
Chris@261:         value = float(vy) / m;
Chris@261:         break;
Chris@261: 
Chris@261:     case MeterScale:
Chris@261:         value = AudioLevel::preview_to_multiplier(vy, m);
Chris@261:         break;
Chris@261: 
Chris@261:     case dBScale:
Chris@274:         value = (-thresh * float(vy)) / m + thresh;
Chris@274:         value = AudioLevel::dB_to_multiplier(value);
Chris@261:         break;
Chris@261:     }
Chris@261: 
Chris@274:     return value / m_gain;
Chris@261: }
Chris@261: 
Chris@261: bool
Chris@267: WaveformLayer::getYScaleValue(const View *v, int y,
Chris@261:                               float &value, QString &unit) const
Chris@261: {
Chris@274:     size_t channel;
Chris@261: 
Chris@274:     value = getValueForY(v, y, channel);
Chris@261: 
Chris@274:     if (m_scale == dBScale || m_scale == MeterScale) {
Chris@261: 
Chris@274:         float thresh = -50.f;
Chris@274:         
Chris@274:         if (value > 0.f) {
Chris@274:             value = 10.f * log10f(value);
Chris@274:             if (value < thresh) value = thresh;
Chris@274:         } else value = thresh;
Chris@274: 
Chris@274:         unit = "dBV";
Chris@274: 
Chris@274:     } else {
Chris@274:         unit = "V";
Chris@274:     }
Chris@274: 
Chris@274:     return true;
Chris@274: }
Chris@274: 
Chris@274: bool
Chris@274: WaveformLayer::getYScaleDifference(const View *v, int y0, int y1,
Chris@274:                                    float &diff, QString &unit) const
Chris@274: {
Chris@274:     size_t c0, c1;
Chris@274:     float v0 = getValueForY(v, y0, c0);
Chris@274:     float v1 = getValueForY(v, y1, c1);
Chris@274: 
Chris@274:     if (c0 != c1) {
Chris@274:         // different channels, not comparable
Chris@274:         diff = 0.f;
Chris@274:         unit = "";
Chris@274:         return false;
Chris@274:     }
Chris@274: 
Chris@274:     if (m_scale == dBScale || m_scale == MeterScale) {
Chris@274: 
Chris@274:         float thresh = -50.f;
Chris@274: 
Chris@274:         if (v1 == v0) diff = thresh;
Chris@274:         else {
Chris@274:             if (v1 > v0) diff = v0 / v1;
Chris@274:             else diff = v1 / v0;
Chris@274: 
Chris@274:             diff = 10.f * log10f(diff);
Chris@274:             if (diff < thresh) diff = thresh;
Chris@274:         }
Chris@274: 
Chris@274:         unit = "dBV";
Chris@274: 
Chris@274:     } else {
Chris@274:         diff = fabsf(v1 - v0);
Chris@274:         unit = "V";
Chris@274:     }
Chris@274: 
Chris@261:     return true;
Chris@261: }
Chris@261: 
Chris@68: int
Chris@607: WaveformLayer::getVerticalScaleWidth(View *, bool, 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@607: WaveformLayer::paintVerticalScale(View *v, bool, 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@274:             int y = getYForValue(v, val, ch);
Chris@0: 
Chris@68:             int ny = y;
Chris@68:             if (nval != 0.0) {
Chris@274:                 ny = getYForValue(v, nval, ch);
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@316: void
Chris@316: WaveformLayer::toXml(QTextStream &stream,
Chris@316:                      QString indent, QString extraAttributes) const
Chris@6: {
Chris@6:     QString s;
Chris@6:     
Chris@285:     QString colourName, colourSpec, darkbg;
Chris@285:     ColourDatabase::getInstance()->getStringValues
Chris@285:         (m_colour, colourName, colourSpec, darkbg);
Chris@285: 
Chris@6:     s += QString("gain=\"%1\" "
Chris@287: 		 "showMeans=\"%2\" "
Chris@287: 		 "greyscale=\"%3\" "
Chris@287: 		 "channelMode=\"%4\" "
Chris@287: 		 "channel=\"%5\" "
Chris@287:                  "scale=\"%6\" "
Chris@287: 		 "aggressive=\"%7\" "
Chris@287:                  "autoNormalize=\"%8\"")
Chris@6: 	.arg(m_gain)
Chris@6: 	.arg(m_showMeans)
Chris@6: 	.arg(m_greyscale)
Chris@6: 	.arg(m_channelMode)
Chris@287: 	.arg(m_channel)
Chris@6: 	.arg(m_scale)
Chris@67: 	.arg(m_aggressive)
Chris@67:         .arg(m_autoNormalize);
Chris@6: 
Chris@316:     SingleColourLayer::toXml(stream, 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@287:     SingleColourLayer::setProperties(attributes);
Chris@287: 
Chris@11:     float gain = attributes.value("gain").toFloat(&ok);
Chris@11:     if (ok) setGain(gain);
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: