V4LDeviceQuerypublic class V4LDeviceQuery extends CaptureDeviceInfo
| Fields Summary |
|---|
| private transient V4LCapture | capture | | private transient Vector | vecFormats | | private transient byte[] | buffer | | protected transient Dimension[] | sizes |
| Constructors Summary |
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public V4LDeviceQuery(int index)
int iPal, iSize;
int i;
VCapability vcap = new VCapability();
capture = new V4LCapture(index);
capture.getCapability(vcap);
name = "v4l:" + vcap.name + ":" + index;
System.err.println("Name = " + name);
tryFormat(capture, VPicture.VIDEO_PALETTE_RGB24, 320, 240);
for (iPal = VPicture.VIDEO_PALETTE_RGB565; iPal < VPicture.VIDEO_PALETTE_YUV410P; iPal++) {
for (iSize = 0; iSize < sizes.length; iSize++) {
tryFormat(capture, iPal, sizes[iSize].width, sizes[iSize].height);
}
}
formats = new Format[vecFormats.size()];
Enumeration enum = vecFormats.elements();
i = 0;
while (enum.hasMoreElements()) {
Format f = (Format) enum.nextElement();
formats[i++] = f;
}
locator = new MediaLocator("v4l://" + index);
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| Methods Summary |
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| private void | addFormat(javax.media.Format fin)
Enumeration enum = vecFormats.elements();
while (enum.hasMoreElements()) {
Format f = (Format) enum.nextElement();
if (f.equals(fin))
return;
}
//System.err.println("New format = " + fin);
vecFormats.addElement(fin);
| | private void | tryFormat(V4LCapture capture, int palette, int width, int height)
System.err.println("Trying " + palette + " " + width + " " + height);
if (capture.setFormat(capture.paletteToDepth(palette),
palette, width, height, 30f) < 0)
return;
if (capture.start() < 0)
return;
// Try a few times
for (int i = 0; i < 5; i++) {
if (capture.readNextFrame(buffer, 0, buffer.length) >= 0) {
// Format is supported, add it
Format f = capture.paletteToFormat(palette, new Dimension(width, height));
System.err.println("Format is " + f);
if (f != null)
addFormat(f);
capture.stop();
return;
}
}
// Not supported
capture.stop();
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