Attachment 1889 Details for Bug 2017 – test program

test program

qtapp.cpp (text/plain), 4.55 KB, created by Oswald Buddenhagen on 2005-02-11 10:52:14 UTC

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Creator: Oswald Buddenhagen

Created: 2005-02-11 10:52:14 UTC

Size: 4.55 KB

patch

obsolete

>#include <qapplication.h>
>#include <qwidget.h>
>
>#include <X11/Xlib.h>
>#include <X11/extensions/Xv.h>
>#include <X11/extensions/Xvlib.h>
>
>#define FOURCC_YUY2 0x32595559
>
>static int xv_port_has_yuy2( XvPortID port )
>{
>    XvImageFormatValues *formatValues;
>    int formats;
>    int i;
>
>    formatValues = XvListImageFormats( qt_xdisplay(), port, &formats );
>    for( i = 0; i < formats; i++ ) {
>        if((formatValues[ i ].id == FOURCC_YUY2) && (!(strcmp( formatValues[ i ].guid, "YUY2" )))) {
>            XFree (formatValues);
>            return 1;
>        }
>    }
>    XFree( formatValues );
>    return 0;
>}
>
>static int xv_check_extension( XvPortID &xv_port, Window win )
>{
>    unsigned int version;
>    unsigned int release;
>    unsigned int dummy;
>    unsigned int adaptors;
>    unsigned int i;
>    unsigned long j;
>    int has_yuy2 = 0;
>    XvAdaptorInfo *adaptorInfo;
>
>    if( ( XvQueryExtension( qt_xdisplay(), &version, &release,
>                            &dummy, &dummy, &dummy) != Success ) ||
>         ( version < 2 ) || ( ( version == 2 ) && ( release < 2 ) ) ) {
>
>        fprintf( stderr, "xvoutput: XVIDEO extension not found: X too old? didn't load extmod?\n" );
>        return 0;
>    }
>
>    XvQueryAdaptors( qt_xdisplay(), win, &adaptors, &adaptorInfo );
>
>    for( i = 0; i < adaptors; i++ ) {
>        if( adaptorInfo[ i ].type & XvImageMask ) {
>            for( j = 0; j < adaptorInfo[ i ].num_ports; j++ ) {
>                if( xv_port_has_yuy2( adaptorInfo[ i ].base_id + j ) ) {
>                    if( XvGrabPort( qt_xdisplay(), adaptorInfo[ i ].base_id + j, 0 ) == Success ) {
>                        xv_port = adaptorInfo[ i ].base_id + j;
>                        fprintf( stderr, "xvoutput: Using XVIDEO adaptor %lu: %s.\n",
>                                 adaptorInfo[ i ].base_id + j, adaptorInfo[ i ].name );
>                        XvFreeAdaptorInfo( adaptorInfo );
>                        return 1;
>                    }
>                    has_yuy2 = 1;
>                }
>            }
>        }
>    }
>
>    XvFreeAdaptorInfo( adaptorInfo );
>
>    if( has_yuy2 )
>        fprintf( stderr, "xvoutput: No YUY2 XVIDEO port available.\n" );
>    else
>        fprintf( stderr, "xvoutput: No XVIDEO port found which supports YUY2 images.\n" );
>    return 0;
>}
>
>
>
>#define W 768
>#define H 576
>
>#define Kr 0.2126
>#define Kb 0.0722
>
>#define L(r,g,b) (Kr * r + Kb * b + (1 - Kr - Kb) * g)
>#define YUY2(r,g,b) \
>	(((int)(219*L(r,g,b)/255 + 16.5)) | \
>	 (((int)(112*(b - L(r,g,b))/((1-Kb)*255) + 128.5)) << 8) | \
>	 (((int)(219*L(r,g,b)/255 + 16.5)) << 16) | \
>	 (((int)(112*(r - L(r,g,b))/((1-Kr)*255) + 128.5)) << 24))
>
>static unsigned long pix[] = {
>	YUY2( 255, 0, 0 ),
>	YUY2( 0, 155, 0 ),
>	YUY2( 0, 0, 255 ),
>};
>
>class MyWidget : public QWidget {
>  public:
>
>	MyWidget() : QWidget( 0, 0, WRepaintNoErase ), sz( qApp->desktop()->screen( 0 )->size() )
>	{
>		if (!xv_check_extension( xv_port, winId() ))
>			exit( 1 );
>        xv_image = XvCreateImage( qt_xdisplay(), xv_port, FOURCC_YUY2,
>                               (char *)buf, W, H );
>		l = x1 = y1 = 0;
>		x2 = W - 1;
>		y2 = H - 1;
>		showFullScreen();
>	}
>
>  protected:
>
>	void closeEvent( QCloseEvent * )
>	{
>		qApp->quit();
>	}
>
>	void paintEvent( QPaintEvent * )
>	{
>		for (int i = 0; i < W * H / 2; i++)
>			buf[i] = pix[l];
>		XvPutImage( qt_xdisplay(), xv_port, winId(),
>		            DefaultGC( qt_xdisplay(), 0 ), xv_image,
>                    x1, y1, x2 - x1 + 1, y2 - y1 + 1,
>		            0, 0, width(), height() );
>	}
>
>	void keyPressEvent( QKeyEvent *e )
>	{
>		int dx, dy, tlf, brf, nx1, ny1, nx2, ny2;
>		switch (e->key()) {
>		case Key_Escape:
>		case Key_Q:
>			qApp->quit();
>			break;
>		case Key_Up:
>			dy = -1, dx = 0;
>			goto com;
>		case Key_Down:
>			dy = 1, dx = 0;
>			goto com;
>		case Key_Left:
>			dx = -1, dy = 0;
>			goto com;
>		case Key_Right:
>			dx = 1, dy = 0;
>		  com:
>			if (e->state() & ControlButton)
>				tlf = 1, brf = 0;
>			else if (e->state() & AltButton)
>				tlf = 0, brf = 1;
>			else
>				tlf = brf = 1;
>			nx1 = x1 + tlf * dx;
>			ny1 = y1 + tlf * dy;
>			nx2 = x2 + brf * dx;
>			ny2 = y2 + brf * dy;
>			if (nx1 >= 0 && nx2 >= nx1 && nx2 < W &&
>				ny1 >= 0 && ny2 >= ny1 && ny2 < H)
>			{
>				x1 = nx1, y1 = ny1, x2 = nx2, y2 = ny2;
>				printf( "%dx%d @ %d,%d\n", x2 - x1 + 1, y2 - y1 + 1, x1, y1 );
>		case Key_Space:
>				if (++l >= (int)(sizeof(pix)/sizeof(pix[0])))
>					l = 0;
>		case Key_Return:
>				update();
>			}
>		}
>		e->ignore();
>	}
>
>  private:
>	QSize sz;
>	int l, x1, y1, x2, y2;
>	unsigned long buf[W * H / 2];
>	XvImage *xv_image;
>	XvPortID xv_port;
>};
>
>int main(int argc, char **argv)
>{
>    QApplication app( argc, argv );
>	MyWidget win;
>
>	app.exec();
>    return 0;
>}

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