Examples of com.xuggle.xuggler.IRational

com.xuggle.xuggler.IRational
This class wraps represents a Rational number for the Xuggler.
Video formats often use rational numbers, and converting between them willy nilly can lead to rounding errors, and eventually, out of sync problems. Therefore we use IRational objects to pass around Rational Numbers and avoid conversion until the very last moment.
Note: There are some static convenience methods in this class that start with s*. They start with s (as opposed to overloading methods (e.g. sAdd(...) vs. add(...)).

  
  @Test
  public void testStreamGetters()
  {
    helperGetStream(0);
    IRational rational = null;
    long val=0;
    
    val = mStream.getIndex();
    log.debug("Index: {}", val);
    
    val = mStream.getId();
    log.debug("ID: {}", val);
    
    rational = mStream.getFrameRate();
    log.debug("Frame Rate: {}", rational.getDouble());
    
    rational = mStream.getTimeBase();
    log.debug("Time Base: {}", rational.getDouble());
    
    val = mStream.getStartTime();
    log.debug("Start Time: {}", val);
    val = mStream.getDuration();
    log.debug("Duration: {}", val);

View Full Code Here

  }


  public void testGetSampleAspectRatio()
  {
    helperGetStream(0);
    IRational sample = mStream.getSampleAspectRatio();
    assertNotNull(sample);
    assertEquals(0, sample.getNumerator());
    assertEquals(0, sample.getNumerator());
  }

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  public void testSetSampleAspectRatio()
  {
    helperGetStream(0);
    
    IRational newVal = IRational.make(3,2);
    mStream.setSampleAspectRatio(newVal);
    
    IRational sample = mStream.getSampleAspectRatio();
    assertNotNull(sample);
    assertEquals(3, sample.getNumerator());
    assertEquals(2, sample.getDenominator());
  }

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  public void testSetSampleAspectRatioNullIgnored()
  {
    helperGetStream(0);
    
    IRational newVal = IRational.make(3,2);
    mStream.setSampleAspectRatio(newVal);
    
    IRational sample = mStream.getSampleAspectRatio();
    assertNotNull(sample);
    assertEquals(3, sample.getNumerator());
    assertEquals(2, sample.getDenominator());


    // Now, set to null and make sure it doesn't actually work or crash the JVM
    newVal = null;
    mStream.setSampleAspectRatio(newVal);
    
    sample = mStream.getSampleAspectRatio();
    assertNotNull(sample);
    assertEquals(3, sample.getNumerator());
    assertEquals(2, sample.getDenominator());
  }

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    IStreamCoder coder = stream.getStreamCoder();
    try
    {
      List<IRational> supportedFrameRates = codec.getSupportedVideoFrameRates();
      IRational timeBase = null;
      if (supportedFrameRates != null && supportedFrameRates.size() > 0)
      {
        IRational highestResolution = null;
        // If we have a list of supported frame rates, then
        // we must pick at least one of them.  and if the
        // user passed in a frameRate, it must match 
        // this list.
        for(IRational supportedRate: supportedFrameRates)
        {
          if (!IRational.positive(supportedRate))
            continue;
          if (highestResolution == null)
            highestResolution = supportedRate.copyReference();


          if (IRational.positive(frameRate))
          {
            if (supportedRate.compareTo(frameRate) == 0)
              // use this
              highestResolution = frameRate.copyReference();
          }
          else if (highestResolution.getDouble() < supportedRate.getDouble())
          {
            highestResolution.delete();
            highestResolution = supportedRate.copyReference();
          }
          supportedRate.delete();
        }
        // if we had a frame rate suggested, but we
        // didn't find a match among the supported elements,
        // throw an error.
        if (IRational.positive(frameRate) &&
            (highestResolution == null ||
                highestResolution.compareTo(frameRate) != 0))
          throw new UnsupportedOperationException("container does not"+
              " support encoding at given frame rate: " + frameRate);
        
        // if we got through the supported list and found NO valid
        // resolution, fail.
        if (highestResolution == null)
          throw new UnsupportedOperationException(
              "could not find supported frame rate for container: " +
              getUrl());
        if (timeBase == null)
          timeBase = IRational.make(highestResolution.getDenominator(),
              highestResolution.getNumerator());
        highestResolution.delete();
        highestResolution = null;
      }
      // if a positive frame rate was passed in, we
      // should either use the inverse of it, or if
      // there is a supported frame rate, but not

View Full Code Here

  public void testVideoGetters()
  {
    int bitRate = -1;
    int height = -1;
    int width = -1;
    IRational timebase = null;
    int gops = -1;
    IPixelFormat.Type pixFmt= IPixelFormat.Type.NONE;
    int sampleRate = -1;
    int channels = -1;
    
    // get the video stream
    mCoder = getStreamCoder(sampleFile, 0);
    bitRate = mCoder.getBitRate();
    height = mCoder.getHeight();
    width = mCoder.getWidth();
    timebase = mCoder.getTimeBase();
    gops = mCoder.getNumPicturesInGroupOfPictures();
    pixFmt = mCoder.getPixelType();
    sampleRate = mCoder.getSampleRate();
    channels = mCoder.getChannels();
    
    // Log them all
    log.debug("Bitrate: {}", bitRate);
    log.debug("Height: {}", height);
    log.debug("Width: {}", width);
    log.debug("Timebase: {}/{}", timebase.getNumerator(),
        timebase.getDenominator());
    log.debug("Num Group of Pictures: {}", gops);
    log.debug("Pixel Format: {}", pixFmt);
    log.debug("Sample Rate: {}", sampleRate);
    log.debug("Channels: {}", channels);
    
    // now our assertions
    assertEquals(0, bitRate);
    assertEquals(176, height);
    assertEquals(424, width);
    assertEquals(1, timebase.getNumerator());
    assertEquals(1000, timebase.getDenominator());
    assertEquals(12, gops);
    assertEquals(IPixelFormat.Type.YUV420P, pixFmt);
    assertEquals(0, sampleRate);
    assertEquals(0, channels);    
  }

View Full Code Here

  public void testAudioGetters()
  {
    int bitRate = -1;
    int height = -1;
    int width = -1;
    IRational timebase = null;
    int gops = -1;
    IPixelFormat.Type pixFmt= IPixelFormat.Type.NONE;
    int sampleRate = -1;
    int channels = -1;
    
    IContainer container = IContainer.make();
    container.open("fixtures/testfile.mp3", IContainer.Type.READ, null);
    IStream stream = container.getStream(0);
    
    // get the audio stream
    mCoder = stream.getStreamCoder();
    bitRate = mCoder.getBitRate();
    height = mCoder.getHeight();
    width = mCoder.getWidth();
    timebase = mCoder.getTimeBase();
    gops = mCoder.getNumPicturesInGroupOfPictures();
    pixFmt = mCoder.getPixelType();
    sampleRate = mCoder.getSampleRate();
    channels = mCoder.getChannels();
    
    // Log them all
    log.debug("Bitrate: {}", bitRate);
    log.debug("Height: {}", height);
    log.debug("Width: {}", width);
    log.debug("Timebase: {}", timebase);
    log.debug("Num Group of Pictures: {}", gops);
    log.debug("Pixel Format: {}", pixFmt);
    log.debug("Sample Rate: {}", sampleRate);
    log.debug("Channels: {}", channels);
    
    // now our assertions
    assertEquals(128000, bitRate, 1000);
    assertEquals(0, height);
    assertEquals(0, width);
    assertEquals(1, timebase.getNumerator());
    assertEquals(14112000, timebase.getDenominator());
    assertEquals(12, gops);
    assertEquals(IPixelFormat.Type.NONE, pixFmt);
    assertEquals(44100, sampleRate);
    assertEquals(2, channels);    
    stream.delete();

View Full Code Here

         * 
         * But take my word that time stamps are tricky, and this only touches
         * the envelope. The good news is, it's easier in Xuggler than some
         * other systems.
         */
        IRational num = null;
        num = ic.getFrameRate();
        oc.setFrameRate(num);
        oc.setTimeBase(IRational.make(num.getDenominator(), num
                .getNumerator()));
        num = null;


        /**
         * And allocate buffers for us to store decoded and resample video

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      IStream stream = mIContainer.getStream(i);
      long tsOffset = 0;
      if (stream.getStartTime() != Global.NO_PTS && stream.getStartTime() > 0
          && stream.getTimeBase() != null)
      {
        IRational defTimeBase = IRational.make(1,
            (int) Global.DEFAULT_PTS_PER_SECOND);
        tsOffset = defTimeBase.rescale(stream.getStartTime(), stream
            .getTimeBase());
      }
      /**
       * And look up the appropriate objects that are working on that stream.
       */

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   * @param oPacket the packet about to be written.
   */
  private void delayForRealTime(IPacket oPacket)
  {
    // convert packet timestamp to microseconds
    final IRational timeBase = oPacket.getTimeBase();
    if (timeBase == null || timeBase.getNumerator() == 0 ||
        timeBase.getDenominator() == 0)
      return;
    long dts = oPacket.getDts();
    if (dts == Global.NO_PTS)
      return;
    
    final long currStreamTime = IRational.rescale(dts,
        1,
        1000000,
        timeBase.getNumerator(),
        timeBase.getDenominator(),
        IRational.Rounding.ROUND_NEAR_INF);
    if (mStartStreamTime == null)
      mStartStreamTime = currStreamTime;


    // convert now to microseconds

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com.xuggle.xuggler.Converter

com.xuggle.xuggler.RationalTest

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com.xuggle.xuggler.SimpleMediaFileTest

com.xuggle.xuggler.StreamCoderTest

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