Version 12, December 2010

[GpsPrune.git] / tim / prune / data / AudioFile.java

diff --git a/tim/prune/data/AudioFile.java b/tim/prune/data/AudioFile.java
new file mode 100644 (file)
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;
+       }
+}