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@30: #ifndef _WAVEFORM_LAYER_H_ Chris@30: #define _WAVEFORM_LAYER_H_ Chris@0: Chris@0: #include Chris@0: #include Chris@0: Chris@128: #include "Layer.h" Chris@0: Chris@128: #include "data/model/RangeSummarisableTimeValueModel.h" Chris@0: Chris@0: class View; Chris@0: class QPainter; Chris@0: class QPixmap; Chris@0: Chris@0: class WaveformLayer : public Layer Chris@0: { Chris@0: Q_OBJECT Chris@0: Chris@0: public: Chris@44: WaveformLayer(); Chris@0: ~WaveformLayer(); Chris@0: Chris@156: virtual const ZoomConstraint *getZoomConstraint() const { Chris@156: return m_model ? m_model->getZoomConstraint() : 0; Chris@156: } Chris@0: virtual const Model *getModel() const { return m_model; } Chris@44: virtual void paint(View *v, QPainter &paint, QRect rect) const; Chris@0: Chris@44: virtual QString getFeatureDescription(View *v, QPoint &) const; Chris@25: Chris@44: virtual int getVerticalScaleWidth(View *v, QPainter &) const; Chris@44: virtual void paintVerticalScale(View *v, QPainter &paint, QRect rect) const; Chris@0: Chris@0: void setModel(const RangeSummarisableTimeValueModel *model); Chris@0: Chris@0: virtual PropertyList getProperties() const; Chris@87: virtual QString getPropertyLabel(const PropertyName &) const; Chris@0: virtual PropertyType getPropertyType(const PropertyName &) const; Chris@0: virtual QString getPropertyGroupName(const PropertyName &) const; Chris@0: virtual int getPropertyRangeAndValue(const PropertyName &, Chris@216: int *min, int *max, int *deflt) const; Chris@0: virtual QString getPropertyValueLabel(const PropertyName &, Chris@0: int value) const; Chris@167: virtual RangeMapper *getNewPropertyRangeMapper(const PropertyName &) const; Chris@0: virtual void setProperty(const PropertyName &, int value); Chris@0: Chris@0: /** Chris@0: * Set the gain multiplier for sample values in this view. Chris@0: * Chris@0: * The default is 1.0. Chris@0: */ Chris@0: void setGain(float gain); Chris@0: float getGain() const { return m_gain; } Chris@0: Chris@0: /** Chris@67: * Toggle automatic normalization of the currently visible waveform. Chris@67: */ Chris@67: void setAutoNormalize(bool); Chris@67: bool getAutoNormalize() const { return m_autoNormalize; } Chris@67: Chris@67: /** Chris@0: * Set the basic display colour for waveforms. Chris@0: * Chris@0: * The default is black. Chris@0: *!!! NB should default to white if the associated View !hasLightBackground() Chris@0: */ Chris@0: void setBaseColour(QColor); Chris@0: QColor getBaseColour() const { return m_colour; } Chris@0: Chris@0: /** Chris@0: * Set whether to display mean values as a lighter-coloured area Chris@0: * beneath the peaks. Rendering will be slightly faster without Chris@0: * but arguably prettier with. Chris@0: * Chris@0: * The default is to display means. Chris@0: */ Chris@0: void setShowMeans(bool); Chris@0: bool getShowMeans() const { return m_showMeans; } Chris@0: Chris@0: /** Chris@0: * Set whether to use shades of grey (or of the base colour) to Chris@0: * provide additional perceived vertical resolution (i.e. using Chris@0: * half-filled pixels to represent levels that only just meet the Chris@0: * pixel unit boundary). This provides a small improvement in Chris@0: * waveform quality at a small cost in rendering speed. Chris@0: * Chris@0: * The default is to use greyscale. Chris@0: */ Chris@0: void setUseGreyscale(bool); Chris@0: bool getUseGreyscale() const { return m_greyscale; } Chris@0: Chris@0: Chris@67: enum ChannelMode { SeparateChannels, MixChannels, MergeChannels }; Chris@0: Chris@0: /** Chris@0: * Specify whether multi-channel audio data should be displayed Chris@67: * with a separate axis per channel (SeparateChannels), with a Chris@0: * single synthetic axis showing channel 0 above the axis and Chris@67: * channel 1 below (MergeChannels), or with a single axis showing Chris@67: * the average of the channels (MixChannels). Chris@0: * Chris@0: * MergeChannels does not work for files with more than 2 Chris@0: * channels. Chris@0: * Chris@0: * The default is SeparateChannels. Chris@0: */ Chris@0: void setChannelMode(ChannelMode); Chris@0: ChannelMode getChannelMode() const { return m_channelMode; } Chris@0: Chris@0: Chris@0: /** Chris@0: * Specify the channel to use from the source model. A value of Chris@0: * -1 means to show all available channels (laid out to the Chris@0: * channel mode). The default is -1. Chris@0: */ Chris@0: void setChannel(int); Chris@0: int getChannel() const { return m_channel; } Chris@0: Chris@0: Chris@0: enum Scale { LinearScale, MeterScale, dBScale }; Chris@0: Chris@0: /** Chris@0: * Specify the vertical scale for sample levels. With LinearScale, Chris@0: * the scale is directly proportional to the raw [-1, +1) Chris@0: * floating-point audio sample values. With dBScale the Chris@0: * vertical scale is proportional to dB level (truncated at Chris@0: * -50dB). MeterScale provides a hybrid variable scale based on Chris@0: * IEC meter scale, intended to provide a clear overview at Chris@0: * relatively small heights. Chris@0: * Chris@0: * Note that the effective gain (see setGain()) is applied before Chris@0: * vertical scaling. Chris@0: * Chris@0: * The default is LinearScale. Chris@0: */ Chris@0: void setScale(Scale); Chris@0: Scale getScale() const { return m_scale; } Chris@0: Chris@0: /** Chris@0: * Enable or disable aggressive pixmap cacheing. If enabled, Chris@0: * waveforms will be rendered to an off-screen pixmap and Chris@0: * refreshed from there instead of being redrawn from the peak Chris@0: * data each time. This may be faster if the data and zoom level Chris@0: * do not change often, but it may be slower for frequently zoomed Chris@0: * data and it will only work if the waveform is the "bottom" Chris@0: * layer on the displayed widget, as each refresh will erase Chris@0: * anything beneath the waveform. Chris@0: * Chris@0: * This is intended specifically for a panner widget display in Chris@0: * which the waveform never moves, zooms, or changes, but some Chris@0: * graphic such as a panner outline is frequently redrawn over the Chris@0: * waveform. This situation would necessitate a lot of waveform Chris@0: * refresh if the default cacheing strategy was used. Chris@0: * Chris@0: * The default is not to use aggressive cacheing. Chris@0: */ Chris@0: void setAggressiveCacheing(bool); Chris@0: bool getAggressiveCacheing() const { return m_aggressive; } Chris@0: Chris@67: virtual bool isLayerScrollable(const View *) const; Chris@67: Chris@115: virtual int getCompletion(View *) const; Chris@0: Chris@101: virtual bool getValueExtents(float &min, float &max, Chris@101: bool &log, QString &unit) const; Chris@79: Chris@267: virtual bool getYScaleValue(const View *v, int y, Chris@261: float &value, QString &unit) const; Chris@274: Chris@274: virtual bool getYScaleDifference(const View *v, int y0, int y1, Chris@274: float &diff, QString &unit) const; Chris@261: Chris@6: virtual QString toXmlString(QString indent = "", Chris@6: QString extraAttributes = "") const; Chris@6: Chris@11: void setProperties(const QXmlAttributes &attributes); Chris@11: Chris@133: virtual int getVerticalZoomSteps(int &defaultStep) const; Chris@133: virtual int getCurrentVerticalZoomStep() const; Chris@133: virtual void setVerticalZoomStep(int); Chris@133: Chris@0: protected: Chris@0: int dBscale(float sample, int m) const; Chris@0: Chris@0: const RangeSummarisableTimeValueModel *m_model; // I do not own this Chris@0: Chris@0: /// Return value is number of channels displayed Chris@67: size_t getChannelArrangement(size_t &min, size_t &max, Chris@67: bool &merging, bool &mixing) const; Chris@0: Chris@274: int getYForValue(const View *v, float value, size_t channel) const; Chris@68: Chris@274: float getValueForY(const View *v, int y, size_t &channel) const; Chris@261: Chris@6: float m_gain; Chris@67: bool m_autoNormalize; Chris@6: QColor m_colour; Chris@6: bool m_showMeans; Chris@6: bool m_greyscale; Chris@6: ChannelMode m_channelMode; Chris@6: int m_channel; Chris@6: Scale m_scale; Chris@6: bool m_aggressive; Chris@0: Chris@67: mutable std::vector m_effectiveGains; Chris@67: Chris@0: mutable QPixmap *m_cache; Chris@0: mutable bool m_cacheValid; Chris@0: mutable int m_cacheZoomLevel; Chris@0: }; Chris@0: Chris@0: #endif