X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fdata%2FAudioClip.java;fp=src%2Ftim%2Fprune%2Fdata%2FAudioClip.java;h=2e5f5ee729968c921e360fd9e470bea6ca9277b1;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/data/AudioClip.java b/src/tim/prune/data/AudioClip.java
new file mode 100644
index 0000000..2e5f5ee
--- /dev/null
+++ b/src/tim/prune/data/AudioClip.java
@@ -0,0 +1,61 @@
+package tim.prune.data;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioSystem;
+
+/**
+ * Class to represent an audio clip for correlation
+ */
+public class AudioClip extends MediaObject
+{
+	/** length of current audio clip in seconds */
+	private int _lengthInSeconds = LENGTH_UNKNOWN;
+
+	private static final int LENGTH_UNKNOWN = -1;
+	private static final int LENGTH_NOT_AVAILABLE = -2;
+
+	/**
+	 * Constructor
+	 * @param inFile file object
+	 */
+	public AudioClip(File inFile)
+	{
+		// Timestamp is always just taken from the file modification stamp
+		super(inFile, new TimestampUtc(inFile.lastModified()));
+	}
+
+	/**
+	 * Constructor
+	 * @param inData byte array of data
+	 * @param inName name of source file
+	 * @param inUrl url from which it came (or null)
+	 */
+	public AudioClip(byte[] inData, String inName, String inUrl)
+	{
+		super(inData, inName, inUrl);
+	}
+
+	/**
+	 * @return length of this audio clip in seconds
+	 */
+	public int getLengthInSeconds()
+	{
+		if (_lengthInSeconds == LENGTH_UNKNOWN)
+		{
+			try {
+				AudioFileFormat format = null;
+				if (getFile() != null)
+					format = AudioSystem.getAudioFileFormat(getFile());
+				else
+					format = AudioSystem.getAudioFileFormat(new ByteArrayInputStream(_data));
+				_lengthInSeconds = (int) (format.getFrameLength() / format.getFormat().getFrameRate());
+			}
+			catch (Exception e) {
+				_lengthInSeconds = LENGTH_NOT_AVAILABLE;
+			}
+		}
+		return _lengthInSeconds;
+	}
+}