/**
* Blocks and reads into a <tt>Buffer</tt> from this <tt>PullBufferStream</tt>.
*
* @param buffer the <tt>Buffer</tt> this <tt>PullBufferStream</tt> is to read into
* @throws IOException if an I/O error occurs while this <tt>PullBufferStream</tt> reads into the
* specified <tt>Buffer</tt>
* @see AbstractVideoPullBufferStream#doRead(Buffer)
*/
@Override
protected void doRead(Buffer buffer) throws IOException {
/*
* Determine the Format in which we're expected to output. We cannot
* rely on the Format always being specified in the Buffer because it is
* not its responsibility, the DataSource of this ImageStream knows the
* output Format.
*/
Format format = buffer.getFormat();
if (format == null) {
format = getFormat();
if (format != null) buffer.setFormat(format);
}
if (format instanceof AVFrameFormat) {
Object o = buffer.getData();
AVFrame frame;
if (o instanceof AVFrame) frame = (AVFrame) o;
else {
frame = new AVFrame();
buffer.setData(frame);
}
AVFrameFormat avFrameFormat = (AVFrameFormat) format;
Dimension size = avFrameFormat.getSize();
ByteBuffer data = readScreenNative(size);
if (data != null) {
if (frame.avpicture_fill(data, avFrameFormat) < 0) {
data.free();
throw new IOException("avpicture_fill");
}
} else {
/*
* This can happen when we disconnect a monitor from computer
* before or during grabbing.
*/
throw new IOException("Failed to grab screen.");
}
} else {
byte[] bytes = (byte[]) buffer.getData();
Dimension size = ((VideoFormat) format).getSize();
bytes = readScreen(bytes, size);
buffer.setData(bytes);
buffer.setOffset(0);
buffer.setLength(bytes.length);
}
buffer.setHeader(null);
buffer.setTimeStamp(System.nanoTime());
buffer.setSequenceNumber(seqNo);
buffer.setFlags(Buffer.FLAG_SYSTEM_TIME | Buffer.FLAG_LIVE_DATA);
seqNo++;
}
private void fillBuffer() {
if (buffer == null) {
buffer = new Buffer();
buffer.setFormat(track.getFormat());
}
do {
if (buffer.isEOM()) return;
if (buffer.getLength() > 0) return; // still have data in buffer
// TODO: any fields to set?
track.readFrame(buffer);
logger.fine("Read buffer from track: " + buffer.getLength());
} while (buffer.isDiscard());
}
/** decode the buffer * */
public int process(Buffer inputBuffer, Buffer outputBuffer) {
if (!checkInputBuffer(inputBuffer)) {
return BUFFER_PROCESSED_FAILED;
}
if (isEOM(inputBuffer)) {
propagateEOM(outputBuffer);
return BUFFER_PROCESSED_OK;
}
Object outData = outputBuffer.getData();
outputBuffer.setData(inputBuffer.getData());
inputBuffer.setData(outData);
outputBuffer.setLength(inputBuffer.getLength());
outputBuffer.setFormat(outputFormat);
outputBuffer.setOffset(inputBuffer.getOffset());
return BUFFER_PROCESSED_OK;
}
@Override
public int process(Buffer input, Buffer output) {
if (!checkInputBuffer(input)) {
return BUFFER_PROCESSED_FAILED;
}
if (isEOM(input)) {
propagateEOM(output); // TODO: what about data? can there be any?
return BUFFER_PROCESSED_OK;
}
try {
// TODO: this is very inefficient - it allocates a new byte array
// (or more) every time
final ByteArrayInputStream is =
new ByteArrayInputStream((byte[]) input.getData(), input.getOffset(), input.getLength());
final BufferedImage image = ImageIO.read(is);
is.close();
final Buffer b =
ImageToBuffer.createBuffer(image, ((VideoFormat) outputFormat).getFrameRate());
output.setData(b.getData());
output.setOffset(b.getOffset());
output.setLength(b.getLength());
output.setFormat(b.getFormat()); // TODO: this is a bit hacky, this
// format will be more specific
// than the actual set output
// format, because now we know what
// ImageIO gave us for a
// BufferedImage as far as pixel
// masks, etc.
return BUFFER_PROCESSED_OK;
} catch (IOException e) {
output.setDiscard(true);
output.setLength(0);
return BUFFER_PROCESSED_FAILED;
}
}
public int process(Buffer inBuffer, Buffer outBuffer) {
try {
if (frameConverter == null) {
frameConverter = new BufferToImage((VideoFormat) inBuffer.getFormat());
}
// Convert the Buffer to an AWT Image.
Image frameImage = frameConverter.createImage(inBuffer);
// Derive a JAI image from the AWT image.
PlanarImage jaiImage = JAI.create("AWTImage", frameImage);
int index;
boolean emboss = false;
if (control != null) {
index = control.getEffectIndex();
if (control.getEffectName().equals("None")) {
outBuffer.setData(inBuffer.getData());
outBuffer.setFormat(inBuffer.getFormat());
outBuffer.setFlags(inBuffer.getFlags());
outBuffer.setLength(inBuffer.getLength());
return BUFFER_PROCESSED_OK;
}
if (control.getEffectName().equals("Emboss")) {
emboss = true; // Special case
}
} else index = 0;
if (kernels[index] == null) {
kernels[index] = new KernelJAI(3, 3, matrices[index]);
}
jaiImage = JAI.create("convolve", jaiImage, kernels[index]);
if (emboss) { // add 128 to make it brighter
double[] constants = new double[] {128., 128., 128.};
ParameterBlock pb = new ParameterBlock();
pb.addSource(jaiImage);
pb.add(constants);
jaiImage = JAI.create("addconst", pb, null);
}
// Now convert the image to a buffer
BufferedImage bim = jaiImage.getAsBufferedImage();
Buffer out = ImageToBuffer.createBuffer(bim, 15.F);
if (out == null) {
if (debug) {
System.out.println("ImageToBuffer returned null");
}
return BUFFER_PROCESSED_FAILED;
}
outBuffer.setData(out.getData());
outBuffer.setFormat(out.getFormat());
outBuffer.setFlags(out.getFlags());
outBuffer.setLength(out.getLength());
} catch (Exception e) {
System.err.println(e);
return BUFFER_PROCESSED_FAILED;
} catch (Error e) {
System.err.println(e);
return BUFFER_PROCESSED_FAILED;
}
return BUFFER_PROCESSED_OK;
}