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#include "qml/qmlwaveformoverview.h"
#include "mixer/basetrackplayer.h"
#include "qml/qmlplayerproxy.h"
namespace {
constexpr double kDesiredChannelHeight = 255;
} // namespace
namespace mixxx {
namespace qml {
QmlWaveformOverview::QmlWaveformOverview(QQuickItem* parent)
: QQuickPaintedItem(parent),
m_pPlayer(nullptr),
m_channels(ChannelFlag::BothChannels),
m_renderer(Renderer::RGB),
m_colorHigh(0xFF0000),
m_colorMid(0x00FF00),
m_colorLow(0x0000FF) {
}
QmlPlayerProxy* QmlWaveformOverview::getPlayer() const {
return m_pPlayer;
}
void QmlWaveformOverview::setPlayer(QmlPlayerProxy* pPlayer) {
if (m_pPlayer == pPlayer) {
return;
}
if (m_pPlayer != nullptr) {
m_pPlayer->internalTrackPlayer()->disconnect(this);
}
m_pPlayer = pPlayer;
if (pPlayer != nullptr) {
connect(m_pPlayer->internalTrackPlayer(),
&BaseTrackPlayer::newTrackLoaded,
this,
&QmlWaveformOverview::slotTrackLoaded);
connect(m_pPlayer->internalTrackPlayer(),
&BaseTrackPlayer::loadingTrack,
this,
&QmlWaveformOverview::slotTrackLoading);
connect(m_pPlayer->internalTrackPlayer(),
&BaseTrackPlayer::playerEmpty,
this,
&QmlWaveformOverview::slotTrackUnloaded);
}
emit playerChanged();
update();
}
QmlWaveformOverview::Channels QmlWaveformOverview::getChannels() const {
return m_channels;
}
void QmlWaveformOverview::setChannels(QmlWaveformOverview::Channels channels) {
if (m_channels == channels) {
return;
}
m_channels = channels;
emit channelsChanged(channels);
}
void QmlWaveformOverview::slotTrackLoaded(TrackPointer pTrack) {
// TODO: Investigate if it's a bug that this debug assertion fails when
// passing tracks on the command line
// DEBUG_ASSERT(m_pCurrentTrack == pTrack);
setCurrentTrack(pTrack);
}
void QmlWaveformOverview::slotTrackLoading(TrackPointer pNewTrack, TrackPointer pOldTrack) {
Q_UNUSED(pOldTrack); // only used in DEBUG_ASSERT
DEBUG_ASSERT(m_pCurrentTrack == pOldTrack);
setCurrentTrack(pNewTrack);
}
void QmlWaveformOverview::slotTrackUnloaded() {
setCurrentTrack(nullptr);
}
void QmlWaveformOverview::setCurrentTrack(TrackPointer pTrack) {
// TODO: Check if this is actually possible
if (m_pCurrentTrack == pTrack) {
return;
}
if (m_pCurrentTrack != nullptr) {
disconnect(m_pCurrentTrack.get(), nullptr, this, nullptr);
}
m_pCurrentTrack = pTrack;
if (pTrack != nullptr) {
connect(pTrack.get(),
&Track::waveformSummaryUpdated,
this,
&QmlWaveformOverview::slotWaveformUpdated);
}
slotWaveformUpdated();
}
void QmlWaveformOverview::slotWaveformUpdated() {
update();
}
void QmlWaveformOverview::paint(QPainter* pPainter) {
TrackPointer pTrack = m_pCurrentTrack;
if (!pTrack) {
return;
}
ConstWaveformPointer pWaveform = pTrack->getWaveformSummary();
if (!pWaveform) {
return;
}
const int dataSize = pWaveform->getDataSize();
if (dataSize == 0) {
return;
}
constexpr int actualCompletion = 0;
// Always multiple of 2
const int waveformCompletion = pWaveform->getCompletion();
// Test if there is some new to draw (at least of pixel width)
const int completionIncrement = waveformCompletion - actualCompletion;
const qreal desiredWidth = static_cast<qreal>(dataSize) / 2;
const double visiblePixelIncrement = completionIncrement * desiredWidth / dataSize;
if (waveformCompletion < (dataSize - 2) &&
(completionIncrement < 2 || visiblePixelIncrement == 0)) {
return;
}
const int nextCompletion = actualCompletion + completionIncrement;
const Channels channels = m_channels;
pPainter->save();
switch (channels) {
case static_cast<int>(ChannelFlag::LeftChannel):
// Draw both channels.
// Set the y axis to half the height of the item
pPainter->translate(0.0, height());
// Set the x axis to half the height of the item
pPainter->scale(width() / desiredWidth, height() / kDesiredChannelHeight);
break;
case static_cast<int>(ChannelFlag::RightChannel):
// Set the x axis to half the height of the item
pPainter->scale(width() / desiredWidth, height() / kDesiredChannelHeight);
break;
default:
// Draw both channels.
// Set the y axis to half the height of the item
pPainter->translate(0.0, height() / 2);
// Set the x axis to half the height of the item
pPainter->scale(width() / desiredWidth, height() / (2 * kDesiredChannelHeight));
}
Renderer renderer = m_renderer;
for (int currentCompletion = actualCompletion;
currentCompletion < nextCompletion;
currentCompletion += 2) {
switch (renderer) {
case Renderer::Filtered:
drawFiltered(pPainter, channels, pWaveform, currentCompletion);
break;
default:
drawRgb(pPainter, channels, pWaveform, currentCompletion);
}
}
pPainter->restore();
}
void QmlWaveformOverview::drawRgb(QPainter* pPainter,
Channels channels,
ConstWaveformPointer pWaveform,
int completion) const {
const double offsetX = completion / 2.0;
if (channels.testFlag(ChannelFlag::LeftChannel)) {
// Draw left channel
const QColor leftColor = getRgbPenColor(pWaveform, completion);
if (leftColor.isValid()) {
const uint8_t leftValue = pWaveform->getAll(completion);
pPainter->setPen(leftColor);
pPainter->drawLine(QPointF(offsetX, -leftValue), QPointF(offsetX, 0.0));
}
}
if (channels.testFlag(ChannelFlag::RightChannel)) {
// Draw right channel
QColor rightColor = getRgbPenColor(pWaveform, completion + 1);
if (rightColor.isValid()) {
const uint8_t rightValue = pWaveform->getAll(completion + 1);
pPainter->setPen(rightColor);
pPainter->drawLine(QPointF(offsetX, 0.0), QPointF(offsetX, rightValue));
}
}
}
void QmlWaveformOverview::drawFiltered(QPainter* pPainter,
Channels channels,
ConstWaveformPointer pWaveform,
int completion) const {
const double offsetX = completion / 2.0;
if (channels.testFlag(ChannelFlag::LeftChannel)) {
const uint8_t leftHigh = pWaveform->getHigh(completion);
pPainter->setPen(m_colorHigh);
pPainter->drawLine(QPointF(offsetX, 2 * -leftHigh), QPointF(offsetX, 0.0));
const uint8_t leftMid = pWaveform->getMid(completion);
pPainter->setPen(m_colorMid);
pPainter->drawLine(QPointF(offsetX, 1.5 * -leftMid), QPointF(offsetX, 0.0));
const uint8_t leftLow = pWaveform->getLow(completion);
pPainter->setPen(m_colorLow);
pPainter->drawLine(QPointF(offsetX, -leftLow), QPointF(offsetX, 0.0));
}
if (channels.testFlag(ChannelFlag::RightChannel)) {
const uint8_t rightHigh = pWaveform->getHigh(completion + 1);
pPainter->setPen(m_colorHigh);
pPainter->drawLine(QPointF(offsetX, 0), QPointF(offsetX, 2 * rightHigh));
const uint8_t rightMid = pWaveform->getMid(completion + 1) * 2;
pPainter->setPen(m_colorMid);
pPainter->drawLine(QPointF(offsetX, 0), QPointF(offsetX, 1.5 * rightMid));
const uint8_t rightLow = pWaveform->getLow(completion + 1);
pPainter->setPen(m_colorLow);
pPainter->drawLine(QPointF(offsetX, 0), QPointF(offsetX, rightLow));
}
}
QColor QmlWaveformOverview::getRgbPenColor(ConstWaveformPointer pWaveform, int completion) const {
// Retrieve "raw" LMH values from waveform
qreal low = static_cast<qreal>(pWaveform->getLow(completion));
qreal mid = static_cast<qreal>(pWaveform->getMid(completion));
qreal high = static_cast<qreal>(pWaveform->getHigh(completion));
// Do matrix multiplication
qreal red = low
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