1 files changed, 71 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/coremedia/iso/boxes/TrackBox.java b/isoparser/src/main/java/com/coremedia/iso/boxes/TrackBox.java
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+++ b/isoparser/src/main/java/com/coremedia/iso/boxes/TrackBox.java
@@ -0,0 +1,71 @@
+/*  
+ * Copyright 2008 CoreMedia AG, Hamburg
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License at 
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0 
+ * 
+ * Unless required by applicable law or agreed to in writing, software 
+ * distributed under the License is distributed on an AS IS BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and 
+ * limitations under the License. 
+ */
+
+package com.coremedia.iso.boxes;
+
+import com.googlecode.mp4parser.AbstractContainerBox;
+
+/**
+ * Tracks are used for two purposes: (a) to contain media data (media tracks) and (b) to contain packetization
+ * information for streaming protocols (hint tracks).  <br>
+ * There shall be at least one media track within an ISO file, and all the media tracks that contributed to the hint
+ * tracks shall remain in the file, even if the media data within them is not referenced by the hint tracks; after
+ * deleting all hint tracks, the entire un-hinted presentation shall remain.
+ */
+public class TrackBox extends AbstractContainerBox {
+    public static final String TYPE = "trak";
+
+    public TrackBox() {
+        super(TYPE);
+    }
+
+    public TrackHeaderBox getTrackHeaderBox() {
+        for (Box box : boxes) {
+            if (box instanceof TrackHeaderBox) {
+                return (TrackHeaderBox) box;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Gets the SampleTableBox at mdia/minf/stbl if existing.
+     *
+     * @return the SampleTableBox or <code>null</code>
+     */
+    public SampleTableBox getSampleTableBox() {
+        MediaBox mdia = getMediaBox();
+        if (mdia != null) {
+            MediaInformationBox minf = mdia.getMediaInformationBox();
+            if (minf != null) {
+                return minf.getSampleTableBox();
+            }
+        }
+        return null;
+
+    }
+
+
+    public MediaBox getMediaBox() {
+        for (Box box : boxes) {
+            if (box instanceof MediaBox) {
+                return (MediaBox) box;
+            }
+        }
+        return null;
+    }
+
+}