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;
}
public List<VideoFormat> enumVideoFormats() {
if (videoFormats != null) return videoFormats;
videoFormats = new ArrayList<VideoFormat>();
videoFormats.add(
new VideoFormatImpl(
VideoFormat.RGB32,
cameraImageSize.getWidth(),
cameraImageSize.getHeight(),
VideoFormat.FPS_UNKNOWN));
// just for fun, add one at quarter size:
videoFormats.add(
new VideoFormatImpl(
VideoFormat.RGB32,
cameraImageSize.getWidth() / 2,
cameraImageSize.getHeight() / 2,
VideoFormat.FPS_UNKNOWN));
return videoFormats;
}
private BufferedImage allocBufferedImage(byte[] bytes) {
// Setting up the buffered image
// bytesPerRow may be larger than needed for a single row.
// for example, a Canon DV camera with 720 pixels across may have enough
// space for 724 pixels.
final int bytesPerRow = gWorld.getPixMap().getPixelData().getRowBytes();
// using a byte[] instead of an int[] is more compatible with the allowed CIVIL output formats
// (always byte[]).
final int w = cameraImageSize.getWidth();
final int h = cameraImageSize.getHeight();
// TODO: we don't need alpha...
final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
final ComponentSampleModel sm =
new ComponentSampleModel(
DataBuffer.TYPE_BYTE,
w,
h,
4,
bytesPerRow,
// bigEndian ? ARGB : ABGR
bigEndian ? new int[] {1, 2, 3, 0} : new int[] {3, 2, 1, 0});
final WritableRaster r = Raster.createWritableRaster(sm, db, new Point(0, 0));
// construction borrowed from BufferedImage constructor, for BufferedImage.TYPE_4BYTE_ABGR
final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
int[] nBits = {8, 8, 8, 8};
// int[] bOffs = {3, 2, 1, 0};
final ColorModel colorModel =
new ComponentColorModel(
cs, nBits, true, false, Transparency.TRANSLUCENT, DataBuffer.TYPE_BYTE);
return new BufferedImage(colorModel, r, false, null);
}