Solved. The solution is simple: I didn't map QVideoFrame. That is why
frame was empty...
On 29.09.2015 14:21, Igor Mironchik wrote:
> Hi guys,
>
> I decided to implement my custom video surface and use it as view
> finder with QCamera.
>
> I wrote:
>
> ViewFinderSurface::ViewFinderSurface( const QCamera & camera, QObject
> * parent )
> : QAbstractVideoSurface( parent )
> , m_camera( camera )
> {
> }
>
> bool
> ViewFinderSurface::present( const QVideoFrame & frame )
> {
> if( !isActive() )
> return false;
>
> qDebug() << "FRAME" << frame.bits() << frame.width() <<
> frame.height() << frame.bytesPerLine();
>
> QImage image( frame.bits(), frame.width(), frame.height(),
> frame.bytesPerLine(),
> QVideoFrame::imageFormatFromPixelFormat( frame.pixelFormat() ) );
>
> qDebug() << "IMAGE is NULL" << image.isNull();
>
> QCameraInfo cameraInfo( m_camera );
>
> const QScreen * screen = QGuiApplication::primaryScreen();
> const int screenAngle = screen->angleBetween(
> screen->nativeOrientation(),
> screen->orientation() );
>
> int rotation = 0;
>
> if( cameraInfo.position() == QCamera::BackFace )
> rotation = ( cameraInfo.orientation() - screenAngle ) % 360;
> else
> rotation = ( 360 - cameraInfo.orientation() + screenAngle ) %
> 360;
>
> image = image.transformed( QTransform().rotate( rotation ) );
>
> emit newFrame( QPixmap::fromImage( image ) );
>
> return true;
> }
>
> QList< QVideoFrame::PixelFormat >
> ViewFinderSurface::supportedPixelFormats(
> QAbstractVideoBuffer::HandleType type ) const
> {
> Q_UNUSED( type )
>
> return QList< QVideoFrame::PixelFormat > ()
> << QVideoFrame::Format_ARGB32
> << QVideoFrame::Format_ARGB32_Premultiplied
> << QVideoFrame::Format_RGB32
> << QVideoFrame::Format_RGB24
> << QVideoFrame::Format_RGB565
> << QVideoFrame::Format_RGB555
> << QVideoFrame::Format_ARGB8565_Premultiplied
> << QVideoFrame::Format_BGRA32
> << QVideoFrame::Format_BGRA32_Premultiplied
> << QVideoFrame::Format_BGR32
> << QVideoFrame::Format_BGR24
> << QVideoFrame::Format_BGR565
> << QVideoFrame::Format_BGR555
> << QVideoFrame::Format_BGRA5658_Premultiplied
> << QVideoFrame::Format_AYUV444
> << QVideoFrame::Format_AYUV444_Premultiplied
> << QVideoFrame::Format_YUV444
> << QVideoFrame::Format_YUV420P
> << QVideoFrame::Format_YV12
> << QVideoFrame::Format_UYVY
> << QVideoFrame::Format_YUYV
> << QVideoFrame::Format_NV12
> << QVideoFrame::Format_NV21
> << QVideoFrame::Format_IMC1
> << QVideoFrame::Format_IMC2
> << QVideoFrame::Format_IMC3
> << QVideoFrame::Format_IMC4
> << QVideoFrame::Format_Y8
> << QVideoFrame::Format_Y16
> << QVideoFrame::Format_Jpeg
> << QVideoFrame::Format_CameraRaw
> << QVideoFrame::Format_AdobeDng;
> }
>
> But I always receive empty QVideoFrame... What's wrong?
--
Best Regards,
Igor Mironchik.
_______________________________________________
Interest mailing list
Interest@qt-project.org
http://lists.qt-project.org/mailman/listinfo/interest
