private void initSequenceGrabber() throws QTException {
if (sequenceGrabberInitialized) return;
QTSession.open();
sg = new SequenceGrabber();
vc = new SGVideoChannel(sg);
// cameraImageSize = new QDRect(320, 240);
if (overrideVideoFormat != null)
cameraImageSize = new QDRect(overrideVideoFormat.getWidth(), overrideVideoFormat.getHeight());
else {
cameraImageSize = vc.getSrcVideoBounds();
logger.info(
"Camera image size reported as: "
+ cameraImageSize.getWidth()
+ "x"
+ cameraImageSize.getHeight());
// this is a workaround found at
// http://rsb.info.nih.gov/ij/plugins/download/QuickTime_Capture.java
// and other places for the isight, which gives the wrong resolution.
// TODO: find a better way of identifying the isight.
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
if (cameraImageSize.getHeight() > screen.height - 40) // iSight camera claims to 1600x1200!
{
logger.warning(
"Camera image size reported as: "
+ cameraImageSize.getWidth()
+ "x"
+ cameraImageSize.getHeight()
+ "; resizing to 640x480");
cameraImageSize.resize(640, 480);
}
}
// On PPC (big endian) we use: k32ARGBPixelFormat
// On Intel we use: k32ABGRPixelFormat
// fails on PPC with DepthErrInvalid: k32ABGRPixelFormat, k32BGRAPixelFormat, k32RGBAPixelFormat
gWorld =
new QDGraphics(
bigEndian ? QDConstants.k32ARGBPixelFormat : QDConstants.k32ABGRPixelFormat,
cameraImageSize); // set a specific pixel format so we can predictably convert to
// buffered image below.
sg.setGWorld(gWorld, null);
vc.setBounds(cameraImageSize);
vc.setUsage(quicktime.std.StdQTConstants.seqGrabRecord);
vc.setFrameRate(0);
myCodec = quicktime.std.StdQTConstants.kComponentVideoCodecType;
vc.setCompressorType(myCodec);
sequenceGrabberInitialized = true;
}
private void disposeSequenceGrabber() throws QTException {
if (!sequenceGrabberInitialized) return;
try {
if (vc != null) vc.disposeQTObject();
if (sg != null) {
sg.stop();
sg.disposeQTObject();
}
QTSession.close();
} finally {
sequenceGrabberInitialized = false;
}
}