X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fdata%2FAudioFile.java;fp=tim%2Fprune%2Fdata%2FAudioFile.java;h=43089ab85570526ad833bff0dcb68283165c167b;hb=f35b6d628f68e3b5ef19965ad8988d0dd1eb8efa;hp=0000000000000000000000000000000000000000;hpb=3745d70b1427bb8ac1a085e47cbdc566936784e1;p=GpsPrune.git

diff --git a/tim/prune/data/AudioFile.java b/tim/prune/data/AudioFile.java
new file mode 100644
index 0000000..43089ab
--- /dev/null
+++ b/tim/prune/data/AudioFile.java
@@ -0,0 +1,45 @@
+package tim.prune.data;
+
+import java.io.File;
+import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioSystem;
+
+/**
+ * Class to represent an audio file for correlation
+ */
+public class AudioFile extends MediaFile
+{
+	/** length of current audio file 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 AudioFile(File inFile)
+	{
+		// Timestamp is always just taken from the file modification stamp
+		super(inFile, new Timestamp(inFile.lastModified()));
+	}
+
+	/**
+	 * @return length of this audio file in seconds
+	 */
+	public int getLengthInSeconds()
+	{
+		if (_lengthInSeconds == LENGTH_UNKNOWN)
+		{
+			try {
+				AudioFileFormat format = AudioSystem.getAudioFileFormat(getFile());
+				_lengthInSeconds = (int) (format.getFrameLength() / format.getFormat().getFrameRate());
+			}
+			catch (Exception e) {
+				_lengthInSeconds = LENGTH_NOT_AVAILABLE;
+			}
+		}
+		return _lengthInSeconds;
+	}
+}