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#include "waveformrendererrgb.h"
#include "waveformwidgetrenderer.h"
#include "waveform/waveform.h"
#include "waveform/waveformwidgetfactory.h"
#include "widget/wskincolor.h"
#include "track/track.h"
#include "widget/wwidget.h"
#include "util/math.h"
#include "util/painterscope.h"
WaveformRendererRGB::WaveformRendererRGB(
WaveformWidgetRenderer* waveformWidgetRenderer)
: WaveformRendererSignalBase(waveformWidgetRenderer) {
}
WaveformRendererRGB::~WaveformRendererRGB() {
}
void WaveformRendererRGB::onSetup(const QDomNode& /* node */) {
}
void WaveformRendererRGB::draw(QPainter* painter,
QPaintEvent* /*event*/) {
const TrackPointer trackInfo = m_waveformRenderer->getTrackInfo();
if (!trackInfo) {
return;
}
ConstWaveformPointer waveform = trackInfo->getWaveform();
if (waveform.isNull()) {
return;
}
const int dataSize = waveform->getDataSize();
if (dataSize <= 1) {
return;
}
const WaveformData* data = waveform->data();
if (data == NULL) {
return;
}
PainterScope PainterScope(painter);
painter->setRenderHints(QPainter::Antialiasing, false);
painter->setRenderHints(QPainter::HighQualityAntialiasing, false);
painter->setRenderHints(QPainter::SmoothPixmapTransform, false);
painter->setWorldMatrixEnabled(false);
painter->resetTransform();
// Rotate if drawing vertical waveforms
if (m_waveformRenderer->getOrientation() == Qt::Vertical) {
painter->setTransform(QTransform(0, 1, 1, 0, 0, 0));
}
const double firstVisualIndex = m_waveformRenderer->getFirstDisplayedPosition() * dataSize;
const double lastVisualIndex = m_waveformRenderer->getLastDisplayedPosition() * dataSize;
const double offset = firstVisualIndex;
// Represents the # of waveform data points per horizontal pixel.
const double gain = (lastVisualIndex - firstVisualIndex) /
(double)m_waveformRenderer->getLength();
// Per-band gain from the EQ knobs.
float allGain(1.0), lowGain(1.0), midGain(1.0), highGain(1.0);
getGains(&allGain, &lowGain, &midGain, &highGain);
QColor color;
QPen pen;
pen.setCapStyle(Qt::FlatCap);
pen.setWidthF(math_max(1.0, 1.0 / m_waveformRenderer->getVisualSamplePerPixel()));
const int breadth = m_waveformRenderer->getBreadth();
const float halfBreadth = (float)breadth / 2.0;
const float heightFactor = allGain * halfBreadth / sqrtf(255 * 255 * 3);
// Draw reference line
painter->setPen(m_pColors->getAxesColor());
painter->drawLine(0, halfBreadth, m_waveformRenderer->getLength(), halfBreadth);
for (int x = 0; x < m_waveformRenderer->getLength(); ++x) {
// Width of the x position in visual indices.
const double xSampleWidth = gain * x;
// Effective visual index of x
const double xVisualSampleIndex = xSampleWidth + offset;
// Our current pixel (x) corresponds to a number of visual samples
// (visualSamplerPerPixel) in our waveform object. We take the max of
// all the data points on either side of xVisualSampleIndex within a
// window of 'maxSamplingRange' visual samples to measure the maximum
// data point contained by this pixel.
double maxSamplingRange = gain / 2.0;
// Since xVisualSampleIndex is in visual-samples (e.g. R,L,R,L) we want
// to check +/- maxSamplingRange frames, not samples. To do this, divide
// xVisualSampleIndex by 2. Since frames indices are integers, we round
// to the nearest integer by adding 0.5 before casting to int.
int visualFrameStart = int(xVisualSampleIndex / 2.0 - maxSamplingRange + 0.5);
int visualFrameStop = int(xVisualSampleIndex / 2.0 + maxSamplingRange + 0.5);
const int lastVisualFrame = dataSize / 2 - 1;
// We now know that some subset of [visualFrameStart, visualFrameStop]
// lies within the valid range of visual frames. Clamp
// visualFrameStart/Stop to within [0, lastVisualFrame].
visualFrameStart = math_clamp(visualFrameStart, 0, lastVisualFrame);
visualFrameStop = math_clamp(visualFrameStop, 0, lastVisualFrame);
int visualIndexStart = visualFrameStart * 2;
int visualIndexStop = visualFrameStop * 2;
unsigned char maxLow = 0;
unsigned char maxMid = 0;
unsigned char maxHigh = 0;
float maxAll = 0.;
float maxAllNext = 0.;
for (int i = visualIndexStart;
i >= 0 && i + 1 < dataSize && i + 1 <= visualIndexStop; i += 2) {
const WaveformData& waveformData = data[i];
const WaveformData& waveformDataNext = data[i + 1];
maxLow = math_max3(maxLow, waveformData.filtered.low, waveformDataNext.filtered.low);
maxMid = math_max3(maxMid, waveformData.filtered.mid, waveformDataNext.filtered.mid);
maxHigh = math_max3(maxHigh, waveformData.filtered.high, waveformDataNext.filtered.high);
float all = pow(waveformData.filtered.low * lowGain, 2) +
pow(waveformData.filtered.mid * midGain, 2) +
pow(waveformData.filtered.high * highGain, 2);
maxAll = math_max(maxAll, all);
float allNext = pow(waveformDataNext.filtered.low * lowGain, 2) +
pow(waveformDataNext.filtered.mid * midGain, 2) +
pow(waveformDataNext.filtered.high * highGain, 2);
maxAllNext = math_max(maxAllNext, allNext);
}
qreal maxLowF = maxLow * lowGain;
qreal maxMidF = maxMid * midGain;
qreal maxHighF = maxHigh * highGain;
qreal red = maxLowF * m_rgbLowColor_r + maxMidF * m_rgbMidColor_r + maxHighF * m_rgbHighColor_r;
qreal green = maxLowF * m_rgbLowColor_g + maxMidF * m_rgbMidColor_g + maxHighF * m_rgbHighColor_g;
qreal blue = maxLowF * m_rgbLowColor_b + maxMidF * m_rgbMidColor_b + maxHighF * m_rgbHighColor_b;
// Compute maximum (needed for value normalization)
qreal max = math_max3(red, green, blue);
// Prevent division by zero
if (max > 0.0f) {
// Set color
color.setRgbF(red / max, green / max, blue / max);
pen.setColor(color);
painter->setPen(pen);
switch (m_alignment) {
case Qt::AlignBottom:
case Qt::AlignRight:
painter->drawLine(
x, breadth,
x, breadth - (int)(heightFactor * sqrtf(math_max(maxAll, maxAllNext))));
break;
case Qt::AlignTop:
case Qt::AlignLeft:
painter->drawLine(
x, 0,
x, (int)(heightFactor * sqrtf(math_max(maxAll, maxAllNext))));
break;
default:
painter->drawLine(
x, (int)(halfBreadth - heightFactor * sqrtf(maxAll)),
x, (int)(halfBreadth + heightFactor * sqrtf(maxAllNext)));
}
}
}
}
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