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#include "qtwaveformrenderersimplesignal.h"
#include "waveformwidgetrenderer.h"
#include "waveform/waveform.h"
#include "waveform/waveformwidgetfactory.h"
#include "widget/wwidget.h"
#include "track/track.h"
#include "util/math.h"
#include "util/painterscope.h"
#include <QLinearGradient>
QtWaveformRendererSimpleSignal::QtWaveformRendererSimpleSignal(WaveformWidgetRenderer* waveformWidgetRenderer) :
WaveformRendererSignalBase(waveformWidgetRenderer) {
}
QtWaveformRendererSimpleSignal::~QtWaveformRendererSimpleSignal() {
}
void QtWaveformRendererSimpleSignal::onSetup(const QDomNode& node) {
Q_UNUSED(node);
QColor borderColor = m_pColors->getSignalColor().lighter(125);
borderColor.setAlphaF(0.5);
m_borderPen.setColor(borderColor);
m_borderPen.setWidthF(1.25);
QColor signalColor = m_pColors->getSignalColor();
signalColor.setAlphaF(0.8);
m_brush = QBrush(signalColor);
}
inline void setPoint(QPointF& point, qreal x, qreal y) {
point.setX(x);
point.setY(y);
}
void QtWaveformRendererSimpleSignal::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->setRenderHint(QPainter::Antialiasing);
painter->resetTransform();
// Rotate if drawing vertical waveforms
if (m_waveformRenderer->getOrientation() == Qt::Vertical) {
painter->setTransform(QTransform(0, 1, -1, 0, m_waveformRenderer->getWidth(), 0));
}
float allGain(1.0);
getGains(&allGain, nullptr, nullptr, nullptr);
double heightGain = allGain * (double)m_waveformRenderer->getBreadth()/255.0;
if (m_alignment == Qt::AlignTop || m_alignment == Qt::AlignRight) {
painter->translate(0.0, 0.0);
painter->scale(1.0, heightGain);
} else if (m_alignment == Qt::AlignBottom || m_alignment == Qt::AlignLeft) {
painter->translate(0.0, m_waveformRenderer->getBreadth());
painter->scale(1.0, heightGain);
} else {
painter->translate(0.0, m_waveformRenderer->getBreadth()/2.0);
painter->scale(1.0, 0.5*heightGain);
}
//draw reference line
if (m_alignment == Qt::AlignCenter) {
painter->setPen(m_pColors->getAxesColor());
painter->drawLine(0,0,m_waveformRenderer->getLength(),0);
}
const double firstVisualIndex =
m_waveformRenderer->getFirstDisplayedPosition() * trackSamples /
audioVisualRatio;
const double lastVisualIndex =
m_waveformRenderer->getLastDisplayedPosition() * trackSamples /
audioVisualRatio;
m_polygon.clear();
m_polygon.reserve(2 * m_waveformRenderer->getLength() + 2);
m_polygon.append(QPointF(0.0, 0.0));
const double offset = firstVisualIndex;
// Represents the # of waveform data points per horizontal pixel.
const double gain = (lastVisualIndex - firstVisualIndex) /
(double)m_waveformRenderer->getLength();
//NOTE(vrince) Please help me find a better name for "channelSeparation"
//this variable stand for merged channel ... 1 = merged & 2 = separated
int channelSeparation = 2;
if (m_alignment != Qt::AlignCenter) {
channelSeparation = 1;
}
for (int channel = 0; channel < channelSeparation; ++channel) {
int startPixel = 0;
int endPixel = m_waveformRenderer->getLength() - 1;
int delta = 1;
double direction = 1.0;
// Reverse display for merged bottom/left channel
if (m_alignment == Qt::AlignBottom || m_alignment == Qt::AlignLeft) {
direction = -1.0;
}
if (channel == 1) {
startPixel = m_waveformRenderer->getLength() - 1;
endPixel = 0;
delta = -1;
direction = -1.0;
// After preparing the first channel, insert the pivot point.
m_polygon.append(QPointF(m_waveformRenderer->getLength(), 0.0));
}
for (int x = startPixel;
(startPixel < endPixel) ? (x <= endPixel) : (x >= endPixel);
x += delta) {
// TODO(rryan) remove before 1.11 release. I'm seeing crashes
// sometimes where the pointIndex is very very large. It hasn't come
// back since adding locking, but I'm leaving this so that we can
// get some info about it before crashing. (The crash usually
// corrupts a lot of the stack).
if (m_polygon.size() > 2 * m_waveformRenderer->getLength() + 2) {
qDebug() << "OUT OF CONTROL"
<< 2 * m_waveformRenderer->getLength() + 2
<< dataSize
<< channel << m_polygon.size() << 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);
// If the entire sample range is off the screen then don't calculate a
// point for this pixel.
const int lastVisualFrame = dataSize / 2 - 1;
if (visualFrameStop < 0 || visualFrameStart > lastVisualFrame) {
m_polygon.append(QPointF(x, 0.0));
continue;
}
// 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 + channel;
int visualIndexStop = visualFrameStop * 2 + channel;
// if (x == m_waveformRenderer->getLength() / 2) {
// qDebug() << "audioVisualRatio" << waveform->getAudioVisualRatio();
// qDebug() << "visualSampleRate" << waveform->getVisualSampleRate();
// qDebug() << "audioSamplesPerVisualPixel" << waveform->getAudioSamplesPerVisualSample();
// qDebug() << "visualSamplePerPixel" << visualSamplePerPixel;
// qDebug() << "xSampleWidth" << xSampleWidth;
// qDebug() << "xVisualSampleIndex" << xVisualSampleIndex;
// qDebug() << "maxSamplingRange" << maxSamplingRange;;
// qDebug() << "Sampling pixel " << x << "over [" << visualIndexStart << visualIndexStop << "]";
// }
unsigned char maxAll = 0;
for (int i = visualIndexStart; i >= 0 && i < dataSize && i <= visualIndexStop;
i += channelSeparation) {
const WaveformData& waveformData = *(data + i);
unsigned char all = waveformData.filtered.all;
maxAll = math_max(maxAll, all);
}
m_polygon.append(QPointF(x, (float)maxAll * direction));
}
}
//If channel are not displayed separately we need to close the loop properly
if (channelSeparation == 1) {
m_polygon.append(QPointF(m_waveformRenderer->getLength(), 0.0));
}
painter->setPen(m_borderPen);
painter->setBrush(m_brush);
painter->drawPolygon(&m_polygon[0], m_polygon.size());
}
void QtWaveformRendererSimpleSignal::onResize() {
m_polygon.resize(2*m_waveformRenderer->getLength()+2);
}
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