1 files changed, 71 insertions, 0 deletions
diff --git a/src/atom_ac3.cpp b/src/atom_ac3.cpp
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--- /dev/null
+++ b/src/atom_ac3.cpp
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+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is MPEG4IP.
+ *
+ * The Initial Developer of the Original Code is Cisco Systems Inc.
+ * Portions created by Cisco Systems Inc. are
+ * Copyright (C) Cisco Systems Inc. 2001.  All Rights Reserved.
+ *
+ * See ETSI TS 102 366 V1.2.1 Annex F for how to put Ac3 in MP4.
+ * 
+ * Contributor(s):
+ *      Edward Groenendaal      egroenen@cisco.com
+ */
+
+#include "src/impl.h"
+
+namespace mp4v2 {
+namespace impl {
+
+///////////////////////////////////////////////////////////////////////////////
+
+MP4Ac3Atom::MP4Ac3Atom()
+        : MP4Atom("ac-3")
+{
+    AddReserved("reserved1", 6); /* 0 */
+
+    AddProperty( /* 1 */
+        new MP4Integer16Property("dataReferenceIndex"));
+
+    AddReserved("reserved2", 8); /* 2 */
+
+    AddProperty( /* 3 */
+        new MP4Integer16Property("channelCount"));
+
+    AddProperty( /* 4 */
+        new MP4Integer16Property("sampleSize"));
+
+    AddReserved("reserved3", 4); /* 5 */
+
+    AddProperty( /* 6 */
+        new MP4Integer16Property("samplingRate"));
+
+    AddReserved("reserved4", 2); /* 7 */
+
+    ExpectChildAtom("dac3", Required, OnlyOne);
+}
+
+void MP4Ac3Atom::Generate()
+{
+    MP4Atom::Generate();
+
+    ((MP4Integer16Property*)m_pProperties[1])->SetValue(1); // data-reference-index
+    ((MP4Integer16Property*)m_pProperties[3])->SetValue(2); // channelCount - ignored
+    ((MP4Integer16Property*)m_pProperties[4])->SetValue(0x0010); // sampleSize - ignored
+
+    // The user should set the samplingRate as appropriate - and create the dac3 atom
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+}
+} // namespace mp4v2::impl