Examples of com.xuggle.ferry.IBuffer

com.xuggle.ferry.IBuffer
Allows Java code to get data from a native buffers, and optionally modify native memory directly.
When accessing from Java, you can copy in and out ranges of buffers. You can do this by-copy (which is safer but a little slower) or by-reference where you directly access underlying C++/native memory from Java. Take special care if you decide that native access is required.

When accessing from C++, you get direct access to the underlying buffer.

To make an IBuffer object that is not a Xuggler internal object, pass in null for the RefCounted parameter.

    {
      directByteBuffer.put(i, (byte)i);
    }
    
    // 
    IBuffer ibuf = IBuffer.make(null, directByteBuffer, 0, numBytes);
    assertNotNull(ibuf);
    
    ByteBuffer outputDirectByteBuffer = ibuf.getByteBuffer(0, numBytes);
    assertNotNull(numBytes);
    assertEquals(numBytes, outputDirectByteBuffer.capacity());
    for(int i = 0; i < numBytes; i++)
    {
      assertEquals(i, outputDirectByteBuffer.get(i));

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    {
      directByteBuffer.put(i, (byte)i);
    }
    
    // 
    IBuffer ibuf = IBuffer.make(null, directByteBuffer, 0, numBytes);
    assertNotNull(ibuf);
    
    ByteBuffer outputDirectByteBuffer = ibuf.getByteBuffer(0, numBytes);
    assertNotNull(numBytes);
    assertEquals(numBytes, outputDirectByteBuffer.capacity());
    for(int i = 0; i < numBytes; i++)
    {
      assertEquals(i, outputDirectByteBuffer.get(i));

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   * will occur.
   */
  @Test
  public void testNoLeakingMemoryOnDirectAccess()
  {
    IBuffer buf = IBuffer.make(null, 1024*1024); // 1 MB
    assertNotNull(buf);
    for(int i = 0; i < 100000; i++)
    {
      java.nio.ByteBuffer nativeBytes = buf.getByteBuffer(0, buf.getBufferSize());
      // and we do nothing with the outBytes
      assertEquals(nativeBytes.limit(), buf.getBufferSize());
      nativeBytes = null;
    }
  }

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   * scope and is collected.
   */
  @Test(timeout=5000)
  public void testDirectByteBufferCanBeAccessedAfterIBufferDisappears()
  {
    IBuffer buf = IBuffer.make(null, 1024*1024); // 1 MB
    assertNotNull(buf);
    
    assertEquals(1, buf.getCurrentRefCount());


    java.nio.ByteBuffer jbuf = buf.getByteBuffer(0, buf.getBufferSize());
    assertNotNull(buf);
    
    // now release the reference
    buf.delete();
    buf = null;


    // in versions prior to 1.22, this would have caused a hard
    // crash, but with 1.22 the getByteBuffer should have incremented
    // the native ref count until this java ByteBuffer gets collected

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   * returned ByteBuffer to native order
   */
  @Test
  public void testByteOrderIsCorrect()
  {
    IBuffer buf = IBuffer.make(null, 1024*1024); // 1 MB
    assertNotNull(buf);
    
    assertEquals(1, buf.getCurrentRefCount());


    java.nio.ByteBuffer jbuf = buf.getByteBuffer(0, buf.getBufferSize());
    assertNotNull(buf);
    
    // Set 4 bytes that have a pattern that is reversible.  On a big
    // endian machine this is FOO and on a little endian it's BAR
    jbuf.put(0, (byte)0xFF);

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  }
  
  @Test
  public void testGetInvalidArgs()
  {
    IBuffer buf = IBuffer.make(null, 1);
    
    byte[] in = new byte[]{ 0x38, 0x2C };
    byte[] out = new byte[]{ 0x53, 0x7C};
    try {
      buf.put(in, 0, 0, 2);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.get(0, out, 0, 2);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.put(in, -1, 0, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.get(-1, out, 0, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.put(in, 0, -1, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.get(0, out, -1, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.put(in, 0, 1, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.get(0, out, 3, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.put(in, 3, 0, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    try {
      buf.get(1, out, 0, 1);
      fail("should fail on 2 bytes");
    } catch (IndexOutOfBoundsException e) {}
    buf.put(in, 0, 0, 1);
    buf.get(0, out, 0, 1);
    assertEquals(in[0], out[0]);
    assertNotSame(in[1], out[1]);
    
    buf.delete();
  }

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    retval = mCoder.open(null, null);
    assertTrue("Could not open codec", retval >= 0);
    int extraDataSize = mCoder.getExtraDataSize();
    assertEquals(expected.length, extraDataSize);


    IBuffer buffer = mCoder.getExtraData();
    assertNotNull(buffer);
    assertEquals(extraDataSize, buffer.getBufferSize());
    retval = mCoder.close();
    assertTrue("Could not close codec", retval >= 0);
    byte[] actual = new byte[expected.length];
    buffer.get(0, actual, 0, actual.length);
    for(int i = 0; i < expected.length; i++)
      assertEquals("differ at: "+i, expected[i], actual[i]);
  }

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  }
  
  @Test
  public void testReadingSamplesIntoIBuffer()
  {
    IBuffer buffer = IBuffer.make(null, 192000*2);
    Helper h = new Helper();
    
    h.setupReadingObject(h.sampleFile);
    
    int retval = -1;

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    samples.setComplete(true, sampleRate, sampleRate,
        channels, IAudioSamples.Format.FMT_S16, 0);
    assertTrue(samples.isComplete());
    
    IBuffer buffer;
    buffer = samples.getData();
    assertEquals(IBuffer.Type.IBUFFER_SINT16, buffer.getType());


    samples.setComplete(true, sampleRate, sampleRate,
        channels, IAudioSamples.Format.FMT_S32, 0);
    assertTrue(samples.isComplete());
    buffer = samples.getData();
    assertEquals(IBuffer.Type.IBUFFER_SINT32, buffer.getType());
 }

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com.xuggle.ferry.BufferTest

com.xuggle.xuggler.AudioSamplesTest

com.xuggle.xuggler.ContainerTest

com.xuggle.xuggler.IMediaDataTest

com.xuggle.xuggler.MemoryAllocationExhaustiveTest

com.xuggle.xuggler.MetaDataTest

com.xuggle.xuggler.StreamCoderTest

com.xuggle.xuggler.TestAudioSamplesGenerator

com.xuggle.xuggler.Utils

com.xuggle.xuggler.UtilsTest

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