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#include "waveformrendererhsv.h"
#include "track/track.h"
#include "util/colorcomponents.h"
#include "util/math.h"
#include "util/painterscope.h"
#include "waveform/waveform.h"
#include "waveform/waveformwidgetfactory.h"
#include "waveformwidgetrenderer.h"
#include "widget/wskincolor.h"
#include "widget/wwidget.h"
WaveformRendererHSV::WaveformRendererHSV(
WaveformWidgetRenderer* waveformWidgetRenderer)
: WaveformRendererSignalBase(waveformWidgetRenderer) {
}
WaveformRendererHSV::~WaveformRendererHSV() {
}
void WaveformRendererHSV::onSetup(const QDomNode& node) {
Q_UNUSED(node);
}
void WaveformRendererHSV::draw(
QPainter* painter,
QPaintEvent* /*event*/) {
ConstWaveformPointer pWaveform = m_waveformRenderer->getWaveform();
if (pWaveform.isNull()) {
return;
}
const double audioVisualRatio = pWaveform->getAudioVisualRatio();
if (audioVisualRatio <= 0) {
return;
}
const int dataSize = pWaveform->getDataSize();
if (dataSize <= 1) {
return;
}
const WaveformData* data = pWaveform->data();
if (data == nullptr) {
return;
}
const int trackSamples = m_waveformRenderer->getTrackSamples();
if (trackSamples <= 0) {
return;
}
PainterScope PainterScope(painter);
painter->setRenderHints(QPainter::Antialiasing, 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() * trackSamples /
audioVisualRatio;
const double lastVisualIndex =
m_waveformRenderer->getLastDisplayedPosition() * trackSamples /
audioVisualRatio;
const double offset = firstVisualIndex;
// Represents the # of waveform data points per horizontal pixel.
const double gain = (lastVisualIndex - firstVisualIndex) /
(double)m_waveformRenderer->getLength();
float allGain(1.0);
getGains(&allGain, nullptr, nullptr, nullptr);
// Get base color of waveform in the HSV format (s and v isn't use)
float h, s, v;
getHsvF(m_pColors->getLowColor(), &h, &s, &v);
QColor color;
float lo, hi, total;
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 = static_cast<float>(breadth) / 2.0f;
const float heightFactor = allGain * halfBreadth / 255.0f;
//draw reference line
painter->setPen(m_pColors->getAxesColor());
painter->drawLine(QLineF(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;
int maxLow[2] = {0, 0};
int maxHigh[2] = {0, 0};
int maxMid[2] = {0, 0};
int maxAll[2] = {0, 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[0] = math_max(maxLow[0], (int)waveformData.filtered.low);
maxLow[1] = math_max(maxLow[1], (int)waveformDataNext.filtered.low);
maxMid[0] = math_max(maxMid[0], (int)waveformData.filtered.mid);
maxMid[1] = math_max(maxMid[1], (int)waveformDataNext.filtered.mid);
maxHigh[0] = math_max(maxHigh[0], (int)waveformData.filtered.high);
maxHigh[1] = math_max(maxHigh[1], (int)waveformDataNext.filtered.high);
maxAll[0] = math_max(maxAll[0], (int)waveformData.filtered.all);
maxAll[1] = math_max(maxAll[1], (int)waveformDataNext.filtered.all);
}
if (maxAll[0] && maxAll[1]) {
// Calculate sum, to normalize
// Also multiply on 1.2 to prevent very dark or light color
total = (maxLow[0] + maxLow[1] + maxMid[0] + maxMid[1] +
maxHigh[0] + maxHigh[1]) *
1.2f;
// prevent division by zero
if (total > 0)
{
// Normalize low and high (mid not need, because it not change the color)
lo = (maxLow[0] + maxLow[1]) / total;
hi = (maxHigh[0] + maxHigh[1]) / total;
} else {
lo = hi = 0.0;
}
// Set color
color.setHsvF(h, 1.0-hi, 1.0-lo);
pen.setColor(color);
painter->setPen(pen);
switch (m_alignment) {
case Qt::AlignBottom :
case Qt::AlignRight :
painter->drawLine(
x, breadth,
x, breadth - (int)(heightFactor * (float)math_max(maxAll[0],maxAll[1])));
break;
case Qt::AlignTop :
case Qt::AlignLeft :
painter->drawLine(
x, 0,
x, (int)(heightFactor * (float)math_max(maxAll[0],maxAll[1])));
break;
default :
painter->drawLine(
x, (int)(halfBreadth - heightFactor * (float)maxAll[0]),
x, (int)(halfBreadth + heightFactor * (float)maxAll[1]));
}
}
}
}
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