#include?“histogramwidget.h“
#include?

HistogramWidget::HistogramWidget（QWidget?*parent）
????:?QWidget（parent）
?????m_levels（128）
?????m_isBusy（false）
{
????m_processor.moveToThread（&m_processorThread）;
????qRegistermetaType?>（“QVector“）;
????connect（&m_processor?SIGNAL（histogramReady（QVector））?SLOT（setHistogram（QVector）））;
????m_processorThread.start（QThread::LowestPriority）;
}

HistogramWidget::~HistogramWidget（）
{
????m_processorThread.quit（）;
????m_processorThread.wait（10000）;
}

void?HistogramWidget::processframe（QVideoframe?frame）
{
????if?（m_isBusy）
????????return;?//drop?frame

????m_isBusy?=?true;
????Qmetaobject::invokeMethod（&m_processor?“processframe“
??????????????????????????????Qt::QueuedConnection?Q_ARG（QVideoframe?frame）?Q_ARG（int?m_levels））;
}

void?HistogramWidget::setHistogram（QVector?histogram）
{
????m_isBusy?=?false;
????m_histogram?=?histogram;
????update（）;
}

void?HistogramWidget::paintEvent（QPaintEvent?*event）
{
????Q_UNUSED（event）;

????QPainter?painter（this）;

????if?（m_histogram.isEmpty（））?{
????????painter.fillRect（0?0?width（）?height（）?QColor::fromRgb（0?0?0））;
????????return;
????}

????qreal?barWidth?=?width（）?/?（qreal）m_histogram.size（）;

????for?（int?i?=?0;?i?????????qreal?h?=?m_histogram[i]?*?height（）;
????????//?draw?level
????????painter.fillRect（barWidth?*?i?height（）?-?h?barWidth?*?（i?+?1）?height（）?Qt::red）;
????????//?clear?the?rest?of?the?control
????????painter.fillRect（barWidth?*?i?0?barWidth?*?（i?+?1）?height（）?-?h?Qt::black）;
????}
}

void?frameProcessor::processframe（QVideoframe?frame?int?levels）
{
????QVector?histogram（levels）;

????do?{
????????if?（!levels）
????????????break;

????????if?（!frame.map（QAbstractVideoBuffer::ReadOnly））
????????????break;

????????if?（frame.pixelFormat（）?==?QVideoframe::Format_YUV420P?||
????????????frame.pixelFormat（）?==?QVideoframe::Format_NV12）?{
????????????//?Process?YUV?data
????????????uchar?*b?=?frame.bits（）;
????????????for?（int?y?=?0;?y?ame.height（）;?y++）?{
????????????????uchar?*lastPixel?=?b?+?frame.width（）;
????????????????for?（uchar?*curPixel?=?b;?curPixel?????????????????????histogram[（*curPixel?*?levels）?>>?8]?+=?1.0;
????????????????b?+=?frame.bytesPerLine（）;
????????????}
????????}?else?{
????????????QImage::Format?imageFormat?=?QVideoframe::imageFormatFromPixelFormat（frame.pixelFormat（））;
????????????if?（imageFormat?!=?QImage::Format_Invalid）?{
????????????????//?Process?RGB?data
????????????????QImage?image（frame.bits（）?frame.width（）?frame.height（）?imageFormat）;
????????????????image?=?image.convertToFormat（QImage::Format_RGB32）;

????????????????const?QRgb*?b?=?（const?QRgb*）image.bits（）;
????????????????for?（int?y?=?0;?y?????????????????????const?QRgb?*lastPixel?=?b?+?frame.width（）;
????????????????????for?（const?QRgb?*curPixel?=?b;?curPixel???????????????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????9595??2017-11-02?14:55??videoPlayer\videoPlayer\GeneratedFiles\Debug\moc_histogramwidget.cpp

?????文件???????8250??2017-11-02?14:55??videoPlayer\videoPlayer\GeneratedFiles\Debug\moc_player.cpp

?????文件??????10240??2017-11-02?14:55??videoPlayer\videoPlayer\GeneratedFiles\Debug\moc_playercontrols.cpp

?????文件???????4687??2017-11-02?14:55??videoPlayer\videoPlayer\GeneratedFiles\Debug\moc_playlistmodel.cpp

?????文件???????2740??2017-11-02?14:55??videoPlayer\videoPlayer\GeneratedFiles\Debug\moc_videowidget.cpp

?????文件???????1390??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\qrc_player.cpp

?????文件???????9595??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\Release\moc_histogramwidget.cpp

?????文件???????8250??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\Release\moc_player.cpp

?????文件??????10240??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\Release\moc_playercontrols.cpp

?????文件???????4687??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\Release\moc_playlistmodel.cpp

?????文件???????2740??2017-11-02?14:56??videoPlayer\videoPlayer\GeneratedFiles\Release\moc_videowidget.cpp

?????文件???????3601??2017-11-02?14:50??videoPlayer\videoPlayer\histogramwidget.cpp

?????文件????????826??2017-11-02?14:50??videoPlayer\videoPlayer\histogramwidget.h

?????文件???????2263??2015-10-13?13:09??videoPlayer\videoPlayer\main.cpp

?????文件????????171??2017-11-02?13:35??videoPlayer\videoPlayer\main_.cpp

?????文件??????14825??2017-11-02?14:55??videoPlayer\videoPlayer\player.cpp

?????文件???????3810??2017-11-02?14:55??videoPlayer\videoPlayer\player.h

?????文件?????????66??2017-11-02?13:35??videoPlayer\videoPlayer\player.qrc

?????文件???????6343??2015-10-13?13:09??videoPlayer\videoPlayer\playercontrols.cpp

?????文件???????3157??2015-10-13?13:09??videoPlayer\videoPlayer\playercontrols.h

?????文件????????131??2017-11-02?13:35??videoPlayer\videoPlayer\player_.cpp

?????文件????????254??2017-11-02?13:35??videoPlayer\videoPlayer\player_.h

?????文件????????584??2017-11-02?13:35??videoPlayer\videoPlayer\player_.ui

?????文件???????5241??2015-10-13?13:09??videoPlayer\videoPlayer\playlistmodel.cpp

?????文件???????3145??2015-10-13?13:09??videoPlayer\videoPlayer\playlistmodel.h

?????文件??????38123??2017-11-02?14:23??videoPlayer\videoPlayer\videoPlayer.vcxproj

?????文件???????4567??2017-11-02?14:23??videoPlayer\videoPlayer\videoPlayer.vcxproj.filters

?????文件????????691??2017-11-20?17:50??videoPlayer\videoPlayer\videoPlayer.vcxproj.user

?????文件???????2906??2015-10-13?13:09??videoPlayer\videoPlayer\videowidget.cpp

?????文件???????2308??2015-10-13?13:09??videoPlayer\videoPlayer\videowidget.h

............此處省略77個文件信息