Initial copy of QtMultimediaKit.

Comes from original repo, with SHA1:
2c82d5611655e5967f5c5095af50c0991c4378b2

examples/videowidget/videowidgetsurface.cpp

@@ -0,0 +1,176 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "videowidgetsurface.h"
+
+#include <QtGui>
+#include <qabstractvideosurface.h>
+#include <qvideosurfaceformat.h>
+
+VideoWidgetSurface::VideoWidgetSurface(QWidget *widget, QObject *parent)
+    : QAbstractVideoSurface(parent)
+    , widget(widget)
+    , imageFormat(QImage::Format_Invalid)
+{
+}
+
+//! [0]
+QList<QVideoFrame::PixelFormat> VideoWidgetSurface::supportedPixelFormats(
+        QAbstractVideoBuffer::HandleType handleType) const
+{
+    if (handleType == QAbstractVideoBuffer::NoHandle) {
+        return QList<QVideoFrame::PixelFormat>()
+                << QVideoFrame::Format_RGB32
+                << QVideoFrame::Format_ARGB32
+                << QVideoFrame::Format_ARGB32_Premultiplied
+                << QVideoFrame::Format_RGB565
+                << QVideoFrame::Format_RGB555;
+    } else {
+        return QList<QVideoFrame::PixelFormat>();
+    }
+}
+//! [0]
+
+//! [1]
+bool VideoWidgetSurface::isFormatSupported(
+        const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const
+{
+    Q_UNUSED(similar);
+
+    const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
+    const QSize size = format.frameSize();
+
+    return imageFormat != QImage::Format_Invalid
+            && !size.isEmpty()
+            && format.handleType() == QAbstractVideoBuffer::NoHandle;
+}
+//! [1]
+
+//! [2]
+bool VideoWidgetSurface::start(const QVideoSurfaceFormat &format)
+{
+    const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
+    const QSize size = format.frameSize();
+
+    if (imageFormat != QImage::Format_Invalid && !size.isEmpty()) {
+        this->imageFormat = imageFormat;
+        imageSize = size;
+        sourceRect = format.viewport();
+
+        QAbstractVideoSurface::start(format);
+
+        widget->updateGeometry();
+        updateVideoRect();
+
+        return true;
+    } else {
+        return false;
+    }
+}
+//! [2]
+
+//! [3]
+void VideoWidgetSurface::stop()
+{
+    currentFrame = QVideoFrame();
+    targetRect = QRect();
+
+    QAbstractVideoSurface::stop();
+
+    widget->update();
+}
+//! [3]
+
+//! [4]
+bool VideoWidgetSurface::present(const QVideoFrame &frame)
+{
+    if (surfaceFormat().pixelFormat() != frame.pixelFormat()
+            || surfaceFormat().frameSize() != frame.size()) {
+        setError(IncorrectFormatError);
+        stop();
+
+        return false;
+    } else {
+        currentFrame = frame;
+
+        widget->repaint(targetRect);
+
+        return true;
+    }
+}
+//! [4]
+
+//! [5]
+void VideoWidgetSurface::updateVideoRect()
+{
+    QSize size = surfaceFormat().sizeHint();
+    size.scale(widget->size().boundedTo(size), Qt::KeepAspectRatio);
+
+    targetRect = QRect(QPoint(0, 0), size);
+    targetRect.moveCenter(widget->rect().center());
+}
+//! [5]
+
+//! [6]
+void VideoWidgetSurface::paint(QPainter *painter)
+{
+    if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
+        const QTransform oldTransform = painter->transform();
+
+        if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {
+           painter->scale(1, -1);
+           painter->translate(0, -widget->height());
+        }
+
+        QImage image(
+                currentFrame.bits(),
+                currentFrame.width(),
+                currentFrame.height(),
+                currentFrame.bytesPerLine(),
+                imageFormat);
+
+        painter->drawImage(targetRect, image, sourceRect);
+
+        painter->setTransform(oldTransform);
+
+        currentFrame.unmap();
+    }
+}
+//! [6]