Examples of javax.media.Buffer

javax.media.Buffer
sun.com/products/java-media/jmf/2.1.1/apidocs/javax/media/Buffer.html" target="_blank">this class in the JMF Javadoc. Coding complete. An observation on the use of Buffer in JMF: it appears that a Buffer is not considered to be immutable as it is processed (by a Codec, etc). JMF will do things like swap the data of two Buffers, or when input is not consumed, update the offset and length. The result of this is that care needs to be taken in implementation code to clone buffers if a buffer is to be used for multiple things (like in a cloned DataSource). @author Ken Larson

    {
      for (ProducerConsumerQueue q : qBuffers.values())
      {
        if (q != null)
        {  
          final Buffer eomBuffer = new Buffer();
          eomBuffer.setEOM(true);
          // TODO: set format/
          try
          {
            q.put(eomBuffer);
          } catch (InterruptedException e)

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        final String formatStr = getStringAttr(atts, "format", null);
        
        final Format format = formatStr == null ? formatsMap.get(currentTrack) : FormatArgUtils.parse(formatStr);


        Buffer buffer = new Buffer();
        buffer.setSequenceNumber(sequenceNumber);
        buffer.setTimeStamp(timeStamp);
        buffer.setDuration(duration);
        buffer.setFlags(flags);
        buffer.setFormat(format);
        
        currentBuffer = buffer;  // data will be set when we get the data element
        currentDataChars = new StringBuilder();
        state = AWAIT_DATA;
//

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        int sequence = header.getSequence();
        long timestamp = header.getTimestamp();
        calculateJitter(timestamp);
        
        Buffer buffer = new Buffer();
        buffer.setHeader(header);
        buffer.setData(data);
        buffer.setOffset(offset);
        buffer.setLength(length);
        buffer.setTimeStamp(timestamp);
        buffer.setSequenceNumber(sequence);


        buffer.setDuration(Math.round((double)length * durationMultiplier * 1000000.0d));


        int flags = Buffer.FLAG_RTP_TIME | Buffer.FLAG_RELATIVE_TIME;
        if (header.getMarker() == 1)
        {
            flags |= Buffer.FLAG_RTP_MARKER;
        }
        buffer.setFlags(flags);


        if ( null != handler )
        {
            try
            {

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    @Override
    public void read(Buffer buffer)
    {
        try
        {
            Buffer data = itsRTPBuffer.removeWait();
            
            if ((data != null) && (buffer != null))
            {
                buffer.setData(data.getData());
                buffer.setOffset(data.getOffset());
                buffer.setLength(data.getLength());
                buffer.setTimeStamp(data.getTimeStamp());
                buffer.setSequenceNumber(data.getSequenceNumber());
                buffer.setFlags(data.getFlags());
                buffer.setFormat(format);
                
                // mgodehardt: will measure thruput in bits per second for the BitRateControl
                // dont know if this the right place to measure the thruput
                long currentTimestamp = System.nanoTime();
                if ( -1 == lastTimestamp )
                {
                    lastTimestamp = currentTimestamp;
                }
                
                bytesProcessed += data.getLength();
                
                if ( (currentTimestamp - lastTimestamp) > 1000000000L )
                {
                    bitsPerSecond = bytesProcessed << 3;
                    bytesProcessed = 0;

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  }
  
  private byte encode(byte[] data, Codec encoder, Format f)
  {
    Buffer input = new Buffer();
    input.setFormat(f);
    input.setData(data);
    input.setLength(2);
    Buffer output = new Buffer();
    output.setData(new byte[1]);
    int res = encoder.process(input, output);
    assertEquals(res, Codec.BUFFER_PROCESSED_OK);
    final byte[] result = (byte[]) output.getData();
    final int resultLen = output.getLength();
    assertEquals(resultLen, 1);
    return result[0];
  }

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  private void fillBuffer()
  {
    if (buffer == null)
    {  
      buffer = new Buffer();
      buffer.setFormat(track.getFormat());
      
    }

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      assertEquals(format.getFlipped(), 0);
    
      
      final BufferToImage b2i = new BufferToImage(format);
      
      final Buffer buffer = new Buffer();
      buffer.setFormat(format);
      //System.out.println(format.getMaxDataLength());
      final int[] ba = new int[format.getMaxDataLength()];
      ba[0] = 2;
      buffer.setData(ba);
      
      final BufferedImage i = (BufferedImage) b2i.createImage(buffer);
      assertTrue(i != null);
      assertEquals(i.getWidth(), format.getSize().width);
      assertEquals(i.getHeight(), format.getSize().height);

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      final BufferToImage b2i = new BufferToImage(f);
      System.out.println("\tfinal BufferToImage b2i = new BufferToImage(f);");
      
      final Buffer buffer = new Buffer();
      buffer.setFormat(f);
      
      System.out.println("\tfinal Buffer buffer = new Buffer();");
      System.out.println("\tbuffer.setFormat(f);");
      
      //System.out.println(format.getMaxDataLength());
      final int[] ba = new int[f.getMaxDataLength()];
      for (int i = 0; i < ba.length; ++i)
      {  ba[i] = (int) i;
      }
      buffer.setData(ba);
      System.out.println("\tbuffer.setData(" + CGUtils.toLiteral(ba) + ");");
      
      final BufferedImage i = (BufferedImage) b2i.createImage(buffer);
      System.out.println("\tfinal BufferedImage i = (BufferedImage) b2i.createImage(buffer);");

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      assertEquals(f.getLineStride(), 4);
      assertEquals(f.getPixelStride(), 1);
      assertEquals(f.getEndian(), -1);
      assertEquals(f.getFlipped(), 0);
      final BufferToImage b2i = new BufferToImage(f);
      final Buffer buffer = new Buffer();
      buffer.setFormat(f);
      buffer.setData(new int[] {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15});
      final BufferedImage i = (BufferedImage) b2i.createImage(buffer);
      assertTrue(i != null);
      assertEquals(i.getWidth(), f.getSize().width);
      assertEquals(i.getHeight(), f.getSize().height);
      assertEquals(i.getColorModel().getColorSpace().getType(), ColorSpace.TYPE_RGB);
      assertEquals(i.getType(), BufferedImage.TYPE_INT_BGR);
      final int[][] target = new int[][] {new int[] {0,0,0},new int[] {1,0,0},new int[] {2,0,0},new int[] {3,0,0},new int[] {4,0,0},new int[] {5,0,0},new int[] {6,0,0},new int[] {7,0,0},new int[] {8,0,0},new int[] {9,0,0},new int[] {10,0,0},new int[] {11,0,0},new int[] {12,0,0},new int[] {13,0,0},new int[] {14,0,0},new int[] {15,0,0},};
      for (int y = 0; y < f.getSize().height; ++y)
      {
        for (int x = 0; x < f.getSize().width; ++x)
        {
          final int[] pix = i.getRaster().getPixel(x, y, (int[]) null);
          assertEquals(pix[0], target[x + y * f.getSize().width][0]);
          assertEquals(pix[1], target[x + y * f.getSize().width][1]);
          assertEquals(pix[2], target[x + y * f.getSize().width][2]);
        }
      }
    }
    {
      final RGBFormat f = new RGBFormat(new java.awt.Dimension(4, 4), 16, Format.intArray, 1.3414634f, 32, 0xff0000, 0xff00, 0xff, 1, 4, 0, -1);
      assertEquals(f.getLineStride(), 4);
      assertEquals(f.getPixelStride(), 1);
      assertEquals(f.getEndian(), -1);
      assertEquals(f.getFlipped(), 0);
      final BufferToImage b2i = new BufferToImage(f);
      final Buffer buffer = new Buffer();
      buffer.setFormat(f);
      buffer.setData(new int[] {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15});
      final BufferedImage i = (BufferedImage) b2i.createImage(buffer);
      assertTrue(i != null);
      assertEquals(i.getWidth(), f.getSize().width);
      assertEquals(i.getHeight(), f.getSize().height);
      assertEquals(i.getColorModel().getColorSpace().getType(), ColorSpace.TYPE_RGB);

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          // underlying buffer, and queue it to ourself and all other cloned streams of the same
          // underlying stream (same stream index):
          
          if (bufferQueue.isEmpty())
          {
            final Buffer originalBuffer = new Buffer();  // TODO: find a way to reuse buffers/avoid allocating new memory each time
            final byte[] originalBufferData = new byte[READ_BUFFER_SIZE];
            originalBuffer.setData(originalBufferData);
            int numRead = stream.read(originalBufferData, 0, originalBufferData.length);
            if (numRead < 0)
              originalBuffer.setEOM(true);
            else
              originalBuffer.setLength(numRead);
            
            try
            {
              for (ClonedDataSource clone : clones)
              {
                final ClonedDataSource.ClonedPullSourceStream clonedStream = (ClonedDataSource.ClonedPullSourceStream) clone.getStreams()[streamIndex];
                clonedStream.getBufferQueue().put((Buffer) originalBuffer.clone());
              }
            }
            catch (InterruptedException e)
            {
              logger.log(Level.WARNING, "" + e, e);

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