1 files changed, 79 insertions, 0 deletions
diff --git a/Src/external_dependencies/libmp4v2/atom_trun.cpp b/Src/external_dependencies/libmp4v2/atom_trun.cpp
new file mode 100644
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--- /dev/null
+++ b/Src/external_dependencies/libmp4v2/atom_trun.cpp
@@ -0,0 +1,79 @@
+/*
+ * 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.
+ * 
+ * Contributor(s): 
+ *		Dave Mackie		dmackie@cisco.com
+ */
+
+#include "mp4common.h"
+
+MP4TrunAtom::MP4TrunAtom() 
+	: MP4Atom("trun")
+{
+	AddVersionAndFlags();	/* 0, 1 */
+	AddProperty( /* 2 */
+		new MP4Integer32Property("sampleCount"));
+}
+
+void MP4TrunAtom::AddProperties(u_int32_t flags)
+{
+	if (flags & 0x01) {
+		// Note this is a signed 32 value
+		AddProperty(
+			new MP4Integer32Property("dataOffset"));
+	}
+	if (flags & 0x04) {
+		AddProperty(
+			new MP4Integer32Property("firstSampleFlags"));
+	}
+
+	MP4TableProperty* pTable = 
+	  new MP4TableProperty("samples", 
+			       (MP4Integer32Property *)m_pProperties[2]);
+	AddProperty(pTable);
+
+	if (flags & 0x100) {
+		pTable->AddProperty(
+			new MP4Integer32Property("sampleDuration"));
+	}
+	if (flags & 0x200) {
+		pTable->AddProperty(
+			new MP4Integer32Property("sampleSize"));
+	}
+	if (flags & 0x400) {
+		pTable->AddProperty(
+			new MP4Integer32Property("sampleFlags"));
+	}
+	if (flags & 0x800) {
+		pTable->AddProperty(
+			new MP4Integer32Property("sampleCompositionTimeOffset"));
+	}
+}
+
+void MP4TrunAtom::Read()
+{
+	/* read atom version, flags, and sampleCount */
+	ReadProperties(0, 3);
+
+	/* need to create the properties based on the atom flags */
+	AddProperties(GetFlags());
+
+	/* now we can read the remaining properties */
+	ReadProperties(3);
+
+	Skip();	// to end of atom
+}