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

      assertEquals(format.getFlipped(), 0);
    
      
      final BufferToImage b2i = new BufferToImage(format);
      
      final Buffer buffer = new Buffer();
      buffer.setFormat(format);
      //System.out.println(format.getMaxDataLength());
      final byte[] ba = new byte[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);
      assertEquals(i.getColorModel().getColorSpace().getType(), ColorSpace.TYPE_RGB);
      assertEquals(i.getType(), BufferedImage.TYPE_INT_RGB);
      // TODO: check other attributes, and pixels
      int[] pix = i.getRaster().getPixel(0, 0, (int[]) null);
      assertEquals(pix[0], 2);
      assertEquals(pix[1], 0);
      assertEquals(pix[2], 0);
      
      
      
      //System.out.println(i.getClass());
    }
    
    {
      // 24bit rgb: r,g,b:
      final RGBFormat format = new RGBFormat(new Dimension(4, 4), 4 * 4 * 3, Format.byteArray, -1.f, 24, 1, 2, 3);
      assertEquals(format.getLineStride(), 4 * 3);  
      assertEquals(format.getPixelStride(), 3);
      assertEquals(format.getEndian(), -1);
      assertEquals(format.getFlipped(), 0);
      
      
      final BufferToImage b2i = new BufferToImage(format);
      
      final Buffer buffer = new Buffer();
      buffer.setFormat(format);
      //System.out.println(format.getMaxDataLength());
      final byte[] ba = new byte[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 byte[] ba = new byte[f.getMaxDataLength()];
      for (int i = 0; i < ba.length; ++i)
      {  ba[i] = (byte) 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(), 12);
      assertEquals(f.getPixelStride(), 3);
      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 byte[] {(byte)0,(byte)1,(byte)2,(byte)3,(byte)4,(byte)5,(byte)6,(byte)7,(byte)8,(byte)9,(byte)10,(byte)11,(byte)12,(byte)13,(byte)14,(byte)15,(byte)16,(byte)17,(byte)18,(byte)19,(byte)20,(byte)21,(byte)22,(byte)23,(byte)24,(byte)25,(byte)26,(byte)27,(byte)28,(byte)29,(byte)30,(byte)31,(byte)32,(byte)33,(byte)34,(byte)35,(byte)36,(byte)37,(byte)38,(byte)39,(byte)40,(byte)41,(byte)42,(byte)43,(byte)44,(byte)45,(byte)46,(byte)47});
      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_RGB);
      final int[][] target = new int[][] {new int[] {0,1,2},new int[] {3,4,5},new int[] {6,7,8},new int[] {9,10,11},new int[] {12,13,14},new int[] {15,16,17},new int[] {18,19,20},new int[] {21,22,23},new int[] {24,25,26},new int[] {27,28,29},new int[] {30,31,32},new int[] {33,34,35},new int[] {36,37,38},new int[] {39,40,41},new int[] {42,43,44},new int[] {45,46,47},};
      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), 48, Format.byteArray, -1.0f, 24, 0x3, 0x2, 0x1, 3, 12, 0, -1);
      assertEquals(f.getLineStride(), 12);
      assertEquals(f.getPixelStride(), 3);
      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 byte[] {(byte)0,(byte)1,(byte)2,(byte)3,(byte)4,(byte)5,(byte)6,(byte)7,(byte)8,(byte)9,(byte)10,(byte)11,(byte)12,(byte)13,(byte)14,(byte)15,(byte)16,(byte)17,(byte)18,(byte)19,(byte)20,(byte)21,(byte)22,(byte)23,(byte)24,(byte)25,(byte)26,(byte)27,(byte)28,(byte)29,(byte)30,(byte)31,(byte)32,(byte)33,(byte)34,(byte)35,(byte)36,(byte)37,(byte)38,(byte)39,(byte)40,(byte)41,(byte)42,(byte)43,(byte)44,(byte)45,(byte)46,(byte)47});
      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_RGB);
      final int[][] target = new int[][] {new int[] {2,1,0},new int[] {5,4,3},new int[] {8,7,6},new int[] {11,10,9},new int[] {14,13,12},new int[] {17,16,15},new int[] {20,19,18},new int[] {23,22,21},new int[] {26,25,24},new int[] {29,28,27},new int[] {32,31,30},new int[] {35,34,33},new int[] {38,37,36},new int[] {41,40,39},new int[] {44,43,42},new int[] {47,46,45},};
      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), 64, Format.byteArray, -1.0f, 32, 0x3, 0x2, 0x1, 4, 16, 0, -1);
      assertEquals(f.getLineStride(), 16);
      assertEquals(f.getPixelStride(), 4);
      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 byte[] {(byte)0,(byte)1,(byte)2,(byte)3,(byte)4,(byte)5,(byte)6,(byte)7,(byte)8,(byte)9,(byte)10,(byte)11,(byte)12,(byte)13,(byte)14,(byte)15,(byte)16,(byte)17,(byte)18,(byte)19,(byte)20,(byte)21,(byte)22,(byte)23,(byte)24,(byte)25,(byte)26,(byte)27,(byte)28,(byte)29,(byte)30,(byte)31,(byte)32,(byte)33,(byte)34,(byte)35,(byte)36,(byte)37,(byte)38,(byte)39,(byte)40,(byte)41,(byte)42,(byte)43,(byte)44,(byte)45,(byte)46,(byte)47,(byte)48,(byte)49,(byte)50,(byte)51,(byte)52,(byte)53,(byte)54,(byte)55,(byte)56,(byte)57,(byte)58,(byte)59,(byte)60,(byte)61,(byte)62,(byte)63});
      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_RGB);
      final int[][] target = new int[][] {new int[] {2,1,0},new int[] {6,5,4},new int[] {10,9,8},new int[] {14,13,12},new int[] {18,17,16},new int[] {22,21,20},new int[] {26,25,24},new int[] {30,29,28},new int[] {34,33,32},new int[] {38,37,36},new int[] {42,41,40},new int[] {46,45,44},new int[] {50,49,48},new int[] {54,53,52},new int[] {58,57,56},new int[] {62,61,60},};
      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), 48, Format.byteArray, -1.0f, 24, 0x1, 0x2, 0x3, 3, 12, 1, -1);
      assertEquals(f.getLineStride(), 12);
      assertEquals(f.getPixelStride(), 3);
      assertEquals(f.getEndian(), -1);
      assertEquals(f.getFlipped(), 1);
      final BufferToImage b2i = new BufferToImage(f);
      final Buffer buffer = new Buffer();
      buffer.setFormat(f);
      buffer.setData(new byte[] {(byte)0,(byte)1,(byte)2,(byte)3,(byte)4,(byte)5,(byte)6,(byte)7,(byte)8,(byte)9,(byte)10,(byte)11,(byte)12,(byte)13,(byte)14,(byte)15,(byte)16,(byte)17,(byte)18,(byte)19,(byte)20,(byte)21,(byte)22,(byte)23,(byte)24,(byte)25,(byte)26,(byte)27,(byte)28,(byte)29,(byte)30,(byte)31,(byte)32,(byte)33,(byte)34,(byte)35,(byte)36,(byte)37,(byte)38,(byte)39,(byte)40,(byte)41,(byte)42,(byte)43,(byte)44,(byte)45,(byte)46,(byte)47});
      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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public class BufferTest extends TestCase
{


  public void testBuffer()
  {
    assertEquals(new Buffer().getData(), null);
    assertEquals(new Buffer().getHeader(), null);
    assertEquals(new Buffer().getDuration(), -1L);
    assertEquals(new Buffer().getFlags(), 0);
    assertEquals(new Buffer().getFormat(), null);
    assertEquals(new Buffer().getLength(), 0);
    assertEquals(new Buffer().getOffset(), 0);
    assertEquals(new Buffer().getSequenceNumber(), Long.MAX_VALUE - 1);
    assertEquals(new Buffer().getTimeStamp(), -1L);
    assertEquals(new Buffer().isEOM(), false);
    assertEquals(new Buffer().isDiscard(), false);
    
    
    {
      Buffer b = new Buffer();
      assertEquals(b.getFlags(), 0);
      b.setEOM(true);
      assertEquals(b.isEOM(), true);
      assertEquals(b.getFlags(), 1);
      b.setEOM(false);
      assertEquals(b.isEOM(), false);
      assertEquals(b.getFlags(), 0);


    }
    
    {
      Buffer b = new Buffer();
      assertEquals(b.getFlags(), 0);
      b.setDiscard(true);
      assertEquals(b.isDiscard(), true);
      assertEquals(b.getFlags(), 2);
      b.setDiscard(false);
      assertEquals(b.isDiscard(), false);
      assertEquals(b.getFlags(), 0);


    }
    
    {
      Buffer b = new Buffer();
      byte[] data = new byte[0];
      b.setData(data);
      assertTrue(b.getData() == data);
      byte[] header = new byte[0];
      b.setHeader(header);
      assertTrue(b.getHeader() == header);
      b.setDuration(1234L);
      assertEquals(b.getDuration(), 1234L);
      b.setFlags(5);
      assertEquals(b.getFlags(), 5);
      Format f = new Format("abc");
      b.setFormat(f);
      assertTrue(b.getFormat() == f);
      b.setLength(9999);
      assertEquals(b.getLength(), 9999);
      b.setOffset(1111);
      assertEquals(b.getOffset(), 1111);
      b.setSequenceNumber(123456789L);
      assertEquals(b.getSequenceNumber(), 123456789L);
      b.setTimeStamp(9999999999L);
      assertEquals(b.getTimeStamp(), 9999999999L);
      
      
    }
      
  }

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    final byte[] header = fakeHeader(javaSoundAudioFormat);
    if (header == null)
      throw new ResourceUnavailableException("Unable to reconstruct header for format: " + inputFormat);
    if (header.length > 0)
    {
      Buffer headerBuffer = new Buffer();
      headerBuffer.setData(header);
      headerBuffer.setLength(header.length);
      bufferQueueInputStream.put(headerBuffer);
    }
    
    audioInputStreamThread = new AudioInputStreamThread(bufferQueueInputStream);
    audioInputStreamThread.start();

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    this.is = is;
    this.bufferSize = bufferSize;
    
    for (int i = 0; i < 2; ++i)
    {
      final Buffer b = new Buffer();
      b.setData(new byte[bufferSize]);
      try
      {
        emptyQueue.put(b);
      } catch (InterruptedException e)
      {

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    {
      try
      {
        while (!isClosing())
        {
          Buffer b = (Buffer) emptyQueue.get();
          b.setEOM(false);
          b.setLength(0);
          b.setOffset(0);
          
          int len = is.read((byte []) b.getData(), 0, bufferSize);
          if (len < 0)
            b.setEOM(true);
          else
            b.setLength(len);
          fullQueue.put(b);
          
          
        }
      }

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        final Dimension outputSize = ((VideoFormat) outputFormat).getSize();
        /* rescale by preserving ratio */
        final BufferedImage scaled = scalePreserveRatio(image, outputSize.width, outputSize.height);  // TODO: is the size exact?  what about rounding errors?


        final Buffer b = ImageToBuffer.createBuffer(scaled, ((VideoFormat) outputFormat).getFrameRate());
        output.setData(b.getData());
        output.setLength(b.getLength());
        output.setOffset(b.getOffset());
        output.setFormat(b.getFormat());
        // TODO: what about format?
    
        return BUFFER_PROCESSED_OK;   
    }

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        final Dimension outputSize = ((VideoFormat) outputFormat).getSize();
        /* rescale by preserving ratio */
        final BufferedImage scaled = scalePreserveRatio(image, outputSize.width, outputSize.height);  // TODO: is the size exact?  what about rounding errors?


        final Buffer b = ImageToBuffer.createBuffer(scaled, ((VideoFormat) outputFormat).getFrameRate());
        output.setData(b.getData());
        output.setLength(b.getLength());
        output.setOffset(b.getOffset());
        output.setFormat(b.getFormat());
        // TODO: what about format?


        return BUFFER_PROCESSED_OK;
    }

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  }
  
  public void capture() throws Exception
  {    
        // Grab a frame
        Buffer buf = fgc.grabFrame();
        
        // Convert it to an image
        BufferToImage btoi = new BufferToImage((VideoFormat)buf.getFormat());
        Image img = btoi.createImage(buf);


        while(img==null)
        {
          buf = fgc.grabFrame();
          btoi = new BufferToImage((VideoFormat)buf.getFormat());
          img = btoi.createImage(buf);


          try{Thread.sleep(10);}catch(Exception e){}
        }

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