示例#1
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  public void close() {

    if (videoStream != null) {

      videoStream.close();
    }

    if (audioStream != null) {

      audioStream.close();
    }

    if (container != null) {

      container.close();
    }

    videoStreamIndex = -1;
    audioStreamIndex = -1;
  }
  /**
   * Takes a media container (file) as the first argument, opens it, opens up a Swing window and
   * displays video frames with <i>roughly</i> the right timing.
   *
   * @param args Must contain one string which represents a filename
   */
  @SuppressWarnings("deprecation")
  public static void main(String[] args) {
    if (args.length <= 0)
      throw new IllegalArgumentException("must pass in a filename" + " as the first argument");

    String filename = args[0];

    // Let's make sure that we can actually convert video pixel formats.
    if (!IVideoResampler.isSupported(IVideoResampler.Feature.FEATURE_COLORSPACECONVERSION))
      throw new RuntimeException(
          "you must install the GPL version"
              + " of Xuggler (with IVideoResampler support) for "
              + "this demo to work");

    // Create a Xuggler container object
    IContainer container = IContainer.make();

    // Open up the container
    if (container.open(filename, IContainer.Type.READ, null) < 0)
      throw new IllegalArgumentException("could not open file: " + filename);

    // query how many streams the call to open found
    int numStreams = container.getNumStreams();

    // and iterate through the streams to find the first video stream
    int videoStreamId = -1;
    IStreamCoder videoCoder = null;
    for (int i = 0; i < numStreams; i++) {
      // Find the stream object
      IStream stream = container.getStream(i);
      // Get the pre-configured decoder that can decode this stream;
      IStreamCoder coder = stream.getStreamCoder();

      if (coder.getCodecType() == ICodec.Type.CODEC_TYPE_VIDEO) {
        videoStreamId = i;
        videoCoder = coder;
        break;
      }
    }
    if (videoStreamId == -1)
      throw new RuntimeException("could not find video stream in container: " + filename);

    /*
     * Now we have found the video stream in this file.  Let's open up our decoder so it can
     * do work.
     */
    if (videoCoder.open() < 0)
      throw new RuntimeException("could not open video decoder for container: " + filename);

    IVideoResampler resampler = null;
    if (videoCoder.getPixelType() != IPixelFormat.Type.BGR24) {
      // if this stream is not in BGR24, we're going to need to
      // convert it.  The VideoResampler does that for us.
      resampler =
          IVideoResampler.make(
              videoCoder.getWidth(),
              videoCoder.getHeight(),
              IPixelFormat.Type.BGR24,
              videoCoder.getWidth(),
              videoCoder.getHeight(),
              videoCoder.getPixelType());
      if (resampler == null)
        throw new RuntimeException("could not create color space " + "resampler for: " + filename);
    }
    /*
     * And once we have that, we draw a window on screen
     */
    openJavaWindow();

    /*
     * Now, we start walking through the container looking at each packet.
     */
    IPacket packet = IPacket.make();
    long firstTimestampInStream = Global.NO_PTS;
    long systemClockStartTime = 0;
    while (container.readNextPacket(packet) >= 0) {
      /*
       * Now we have a packet, let's see if it belongs to our video stream
       */
      if (packet.getStreamIndex() == videoStreamId) {
        /*
         * We allocate a new picture to get the data out of Xuggler
         */
        IVideoPicture picture =
            IVideoPicture.make(
                videoCoder.getPixelType(), videoCoder.getWidth(), videoCoder.getHeight());

        int offset = 0;
        while (offset < packet.getSize()) {
          /*
           * Now, we decode the video, checking for any errors.
           *
           */
          int bytesDecoded = videoCoder.decodeVideo(picture, packet, offset);
          if (bytesDecoded < 0)
            throw new RuntimeException("got error decoding video in: " + filename);
          offset += bytesDecoded;

          /*
           * Some decoders will consume data in a packet, but will not be able to construct
           * a full video picture yet.  Therefore you should always check if you
           * got a complete picture from the decoder
           */
          if (picture.isComplete()) {
            IVideoPicture newPic = picture;
            /*
             * If the resampler is not null, that means we didn't get the
             * video in BGR24 format and
             * need to convert it into BGR24 format.
             */
            if (resampler != null) {
              // we must resample
              newPic =
                  IVideoPicture.make(
                      resampler.getOutputPixelFormat(), picture.getWidth(), picture.getHeight());
              if (resampler.resample(newPic, picture) < 0)
                throw new RuntimeException("could not resample video from: " + filename);
            }
            if (newPic.getPixelType() != IPixelFormat.Type.BGR24)
              throw new RuntimeException(
                  "could not decode video" + " as BGR 24 bit data in: " + filename);

            /**
             * We could just display the images as quickly as we decode them, but it turns out we
             * can decode a lot faster than you think.
             *
             * <p>So instead, the following code does a poor-man's version of trying to match up the
             * frame-rate requested for each IVideoPicture with the system clock time on your
             * computer.
             *
             * <p>Remember that all Xuggler IAudioSamples and IVideoPicture objects always give
             * timestamps in Microseconds, relative to the first decoded item. If instead you used
             * the packet timestamps, they can be in different units depending on your IContainer,
             * and IStream and things can get hairy quickly.
             */
            if (firstTimestampInStream == Global.NO_PTS) {
              // This is our first time through
              firstTimestampInStream = picture.getTimeStamp();
              // get the starting clock time so we can hold up frames
              // until the right time.
              systemClockStartTime = System.currentTimeMillis();
            } else {
              long systemClockCurrentTime = System.currentTimeMillis();
              long millisecondsClockTimeSinceStartofVideo =
                  systemClockCurrentTime - systemClockStartTime;
              // compute how long for this frame since the first frame in the
              // stream.
              // remember that IVideoPicture and IAudioSamples timestamps are
              // always in MICROSECONDS,
              // so we divide by 1000 to get milliseconds.
              long millisecondsStreamTimeSinceStartOfVideo =
                  (picture.getTimeStamp() - firstTimestampInStream) / 1000;
              final long millisecondsTolerance = 50; // and we give ourselfs 50 ms of tolerance
              final long millisecondsToSleep =
                  (millisecondsStreamTimeSinceStartOfVideo
                      - (millisecondsClockTimeSinceStartofVideo + millisecondsTolerance));
              if (millisecondsToSleep > 0) {
                try {
                  Thread.sleep(millisecondsToSleep);
                } catch (InterruptedException e) {
                  // we might get this when the user closes the dialog box, so
                  // just return from the method.
                  return;
                }
              }
            }

            // And finally, convert the BGR24 to an Java buffered image
            BufferedImage javaImage = Utils.videoPictureToImage(newPic);

            // and display it on the Java Swing window
            updateJavaWindow(javaImage);
          }
        }
      } else {
        /*
         * This packet isn't part of our video stream, so we just
         * silently drop it.
         */
        do {} while (false);
      }
    }
    /*
     * Technically since we're exiting anyway, these will be cleaned up by
     * the garbage collector... but because we're nice people and want
     * to be invited places for Christmas, we're going to show how to clean up.
     */
    if (videoCoder != null) {
      videoCoder.close();
      videoCoder = null;
    }
    if (container != null) {
      container.close();
      container = null;
    }
    closeJavaWindow();
  }
  /**
   * The playSong method is responsible for opening a Xuggler container to play song at provided
   * location.
   *
   * @param songURL The location of the song to play (local file path or url)
   */
  public void playSong(String songURL) {

    IContainer container = IContainer.make();

    IContainerFormat format = IContainerFormat.make();

    // Stream format must currently be mp3
    format.setInputFormat("mp3");

    //		int s = container.setInputBufferLength(6270);
    //
    //		if(s < 0){
    //			logger.warn("Input buffer was not set to desired length");
    //		}

    // Probe size value must be >50 for some reason. Native libraries throw an exception if it's
    // <50. Measured in bytes.
    if (container.setProperty("probesize", 50) < 0) {
      logger.warn("Probe size not set for input container.");
    }

    if (container.setProperty("analyzeduration", 1) < 0) {
      logger.warn("Analyze duration not changed for input container.");
    }

    container.setFlag(IContainer.Flags.FLAG_NONBLOCK, true);

    if (container.open(songURL, Type.READ, format, true, false) < 0) {
      throw new IllegalArgumentException("stream not found");
    }

    int numStreams = container.getNumStreams();

    // long streamRec = System.currentTimeMillis();

    logger.info("Number of Audio streams detected {}", numStreams);

    IPacket packet = IPacket.make();
    IStream stream = null;
    IStreamCoder audioCoder = null;

    Map<Integer, IStreamCoder> knownStreams = new HashMap<Integer, IStreamCoder>();

    long previousValue = 0;

    while (container.readNextPacket(packet) >= 0 && alive) {

      if (packet.isComplete()) {

        if (knownStreams.get(packet.getStreamIndex()) == null) {
          container.queryStreamMetaData(); // This method tends to take awhile when reading a stream
          stream = container.getStream(packet.getStreamIndex());
          knownStreams.put(packet.getStreamIndex(), stream.getStreamCoder());

          audioCoder = knownStreams.get(packet.getStreamIndex());

          audioCoder.setTimeBase(stream.getTimeBase());
        }

        if (!audioCoder.isOpen()) {
          if (audioCoder.open(null, null) < 0) {
            throw new RuntimeException("could not open audio decoder for container");
          }

          openSound(audioCoder);

          // System.out.println("Opening sound  " + (System.currentTimeMillis() - streamRec));
        }

        // System.err.println(audioCoder.getNumDroppedFrames());

        int offset = 0;

        IAudioSamples samples = IAudioSamples.make(1024, audioCoder.getChannels());

        while (offset < packet.getSize() && alive) {

          // Wait until the state is playing
          while (state != PlayBack_State.PLAYING) {

            if (state == PlayBack_State.TEARDOWN) {
              break;
            } else {
              try {
                synchronized (LOCK_OBJECT) {
                  // mLine.drain();
                  mLine.flush();
                  mLine.stop();

                  LOCK_OBJECT.wait();

                  mLine.start();
                }
              } catch (InterruptedException e) {
                logger.error("", e);
              }
            }
          }

          int bytesDecoded = audioCoder.decodeAudio(samples, packet, offset);

          if (bytesDecoded < 0) {
            logger.warn("Error occurred decoding audio");
            break;
            // throw new RuntimeException("got error decoding audio");
          }

          offset += bytesDecoded;

          if (samples.isComplete() && alive) {
            playJavaSound(samples);
          }

          // Send the time stamp to the GUI for updating the progress bar
          long newValue = (long) (packet.getTimeStamp() * packet.getTimeBase().getValue());

          // Update GUI every second that the stream is playing
          if (newValue > previousValue) {
            callback.notifyGUISongProgress(newValue);
            callback.isStreaming(true);
            previousValue = newValue;

            if (newValue == streamInfo.getSongDuration()) {
              alive = false;
            }
          }
        }
      }
    }

    closeJavaSound();

    if (audioCoder != null) {
      audioCoder.close();
      audioCoder = null;
    }
    if (container != null) {
      container.close();
      container = null;
    }
  }