1 files changed, 140 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/boxes/EC3SpecificBox.java b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/EC3SpecificBox.java
new file mode 100644
index 0000000..412db04
--- /dev/null
+++ b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/EC3SpecificBox.java
@@ -0,0 +1,140 @@
+package com.googlecode.mp4parser.boxes;
+
+import com.googlecode.mp4parser.AbstractBox;
+import com.googlecode.mp4parser.boxes.mp4.objectdescriptors.BitReaderBuffer;
+import com.googlecode.mp4parser.boxes.mp4.objectdescriptors.BitWriterBuffer;
+
+import java.nio.ByteBuffer;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ *
+ */
+public class EC3SpecificBox extends AbstractBox {
+    List<Entry> entries = new LinkedList<Entry>();
+    int dataRate;
+    int numIndSub;
+
+    public EC3SpecificBox() {
+        super("dec3");
+    }
+
+    @Override
+    public long getContentSize() {
+        long size = 2;
+        for (Entry entry : entries) {
+            if (entry.num_dep_sub > 0) {
+                size += 4;
+            } else {
+                size += 3;
+            }
+        }
+        return size;
+    }
+
+    @Override
+    public void _parseDetails(ByteBuffer content) {
+        BitReaderBuffer brb = new BitReaderBuffer(content);
+        dataRate = brb.readBits(13);
+        numIndSub = brb.readBits(3) + 1;
+        // This field indicates the number of independent substreams that are present in the Enhanced AC-3 bitstream. The value
+        // of this field is one less than the number of independent substreams present.
+
+
+        for (int i = 0; i < numIndSub; i++) {
+            Entry e = new Entry();
+            e.fscod = brb.readBits(2);
+            e.bsid = brb.readBits(5);
+            e.bsmod = brb.readBits(5);
+            e.acmod = brb.readBits(3);
+            e.lfeon = brb.readBits(1);
+            e.reserved = brb.readBits(3);
+            e.num_dep_sub = brb.readBits(4);
+            if (e.num_dep_sub > 0) {
+                e.chan_loc = brb.readBits(9);
+            } else {
+                e.reserved2 = brb.readBits(1);
+            }
+            entries.add(e);
+        }
+    }
+
+    @Override
+    public void getContent(ByteBuffer byteBuffer) {
+        BitWriterBuffer bwb = new BitWriterBuffer(byteBuffer);
+        bwb.writeBits(dataRate, 13);
+        bwb.writeBits(entries.size() - 1, 3);
+        for (Entry e : entries) {
+            bwb.writeBits(e.fscod, 2);
+            bwb.writeBits(e.bsid, 5);
+            bwb.writeBits(e.bsmod, 5);
+            bwb.writeBits(e.acmod, 3);
+            bwb.writeBits(e.lfeon, 1);
+            bwb.writeBits(e.reserved, 3);
+            bwb.writeBits(e.num_dep_sub, 4);
+            if (e.num_dep_sub > 0) {
+                bwb.writeBits(e.chan_loc, 9);
+            } else {
+                bwb.writeBits(e.reserved2, 1);
+            }
+        }
+    }
+
+
+    public List<Entry> getEntries() {
+        return entries;
+    }
+
+    public void setEntries(List<Entry> entries) {
+        this.entries = entries;
+    }
+
+    public void addEntry(Entry entry) {
+        this.entries.add(entry);
+    }
+
+    public int getDataRate() {
+        return dataRate;
+    }
+
+    public void setDataRate(int dataRate) {
+        this.dataRate = dataRate;
+    }
+
+    public int getNumIndSub() {
+        return numIndSub;
+    }
+
+    public void setNumIndSub(int numIndSub) {
+        this.numIndSub = numIndSub;
+    }
+
+    public static class Entry {
+        public int fscod;
+        public int bsid;
+        public int bsmod;
+        public int acmod;
+        public int lfeon;
+        public int reserved;
+        public int num_dep_sub;
+        public int chan_loc;
+        public int reserved2;
+
+
+        @Override
+        public String toString() {
+            return "Entry{" +
+                    "fscod=" + fscod +
+                    ", bsid=" + bsid +
+                    ", bsmod=" + bsmod +
+                    ", acmod=" + acmod +
+                    ", lfeon=" + lfeon +
+                    ", reserved=" + reserved +
+                    ", num_dep_sub=" + num_dep_sub +
+                    ", chan_loc=" + chan_loc +
+                    ", reserved2=" + reserved2 +
+                    '}';
+        }
+    }
+}