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f0e371d622
Added zoom functionality + autofocus + automatic detection (at the immediate previous version the user had to press a button to initiate decoding). git-svn-id: https://zxing.googlecode.com/svn/trunk@1925 59b500cc-1b3d-0410-9834-0bbf25fbcc57
101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
#include "myvideosurface.h"
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MyVideoSurface::MyVideoSurface(QWidget* widget, VideoIF* target, QObject* parent)
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: QAbstractVideoSurface(parent)
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{
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m_targetWidget = widget;
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m_target = target;
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m_imageFormat = QImage::Format_Invalid;
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timer = new QTimer(this);
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connect(timer, SIGNAL(timeout()), this, SLOT(sendImageToDecode()));
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timer->start(500);
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}
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MyVideoSurface::~MyVideoSurface()
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{
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}
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bool MyVideoSurface::start(const QVideoSurfaceFormat &format)
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{
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m_videoFormat = format;
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const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
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const QSize size = format.frameSize();
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if (imageFormat != QImage::Format_Invalid && !size.isEmpty()) {
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m_imageFormat = imageFormat;
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QAbstractVideoSurface::start(format);
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return true;
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} else {
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return false;
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}
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}
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bool MyVideoSurface::present(const QVideoFrame &frame)
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{
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m_frame = frame;
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if (surfaceFormat().pixelFormat() != m_frame.pixelFormat() ||
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surfaceFormat().frameSize() != m_frame.size()) {
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stop();
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return false;
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} else {
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m_target->updateVideo();
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return true;
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}
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}
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void MyVideoSurface::paint(QPainter *painter)
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{
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if (m_frame.map(QAbstractVideoBuffer::ReadOnly)) {
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QImage image(
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m_frame.bits(),
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m_frame.width(),
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m_frame.height(),
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m_frame.bytesPerLine(),
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m_imageFormat);
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QRect r = m_targetWidget->rect();
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QPoint centerPic((qAbs(r.size().width() - image.size().width())) / 2, (qAbs(
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r.size().height() - image.size().height())) / 2);
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if (!image.isNull()) {
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painter->drawImage(centerPic,image);
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}
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m_frame.unmap();
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}
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}
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QList<QVideoFrame::PixelFormat> MyVideoSurface::supportedPixelFormats(
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QAbstractVideoBuffer::HandleType handleType) const
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{
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if (handleType == QAbstractVideoBuffer::NoHandle) {
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return QList<QVideoFrame::PixelFormat>()
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<< QVideoFrame::Format_RGB32
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<< QVideoFrame::Format_ARGB32
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<< QVideoFrame::Format_ARGB32_Premultiplied
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<< QVideoFrame::Format_RGB565
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<< QVideoFrame::Format_RGB555;
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} else {
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return QList<QVideoFrame::PixelFormat>();
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}
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}
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void MyVideoSurface::sendImageToDecode()
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{
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if (m_frame.map(QAbstractVideoBuffer::ReadOnly)) {
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QImage image(
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m_frame.bits(),
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m_frame.width(),
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m_frame.height(),
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m_frame.bytesPerLine(),
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m_imageFormat);
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if (!image.isNull())
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emit imageCaptured(image);
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m_frame.unmap();
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}
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}
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