Initial community commit

1 files changed, 130 insertions, 0 deletions

diff --git a/Src/external_dependencies/libmp4v2/atom_tkhd.cpp b/Src/external_dependencies/libmp4v2/atom_tkhd.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.
+ * 
+ * Contributor(s): 
+ *		Dave Mackie		dmackie@cisco.com
+ */
+
+#include "mp4common.h"
+
+MP4TkhdAtom::MP4TkhdAtom() 
+	: MP4Atom("tkhd")
+{
+	AddVersionAndFlags();
+}
+
+void MP4TkhdAtom::AddProperties(u_int8_t version) 
+{
+	if (version == 1) {
+		AddProperty( /* 2 */
+			new MP4Integer64Property("creationTime"));
+		AddProperty( /* 3 */
+			new MP4Integer64Property("modificationTime"));
+	} else { // version == 0
+		AddProperty( /* 2 */
+			new MP4Integer32Property("creationTime"));
+		AddProperty( /* 3 */
+			new MP4Integer32Property("modificationTime"));
+	}
+
+	AddProperty( /* 4 */
+		new MP4Integer32Property("trackId"));
+	AddReserved("reserved1", 4); /* 5 */
+
+	if (version == 1) {
+		AddProperty( /* 6 */
+			new MP4Integer64Property("duration"));
+	} else {
+		AddProperty( /* 6 */
+			new MP4Integer32Property("duration"));
+	}
+
+	AddReserved("reserved2", 12); /* 7 */
+
+	MP4Float32Property* pProp;
+
+	pProp = new MP4Float32Property("volume");
+	pProp->SetFixed16Format();
+	AddProperty(pProp); /* 8 */
+
+	AddReserved("reserved3", 2); /* 9 */
+
+	AddProperty(new MP4BytesProperty("matrix", 36)); /* 10 */
+
+	pProp = new MP4Float32Property("width");
+	pProp->SetFixed32Format();
+	AddProperty(pProp); /* 11 */
+
+	pProp = new MP4Float32Property("height");
+	pProp->SetFixed32Format();
+	AddProperty(pProp); /* 12 */
+}
+
+void MP4TkhdAtom::Generate() 
+{
+	u_int8_t version = m_pFile->Use64Bits(GetType()) ? 1 : 0;
+	SetVersion(version);
+	AddProperties(version);
+
+	MP4Atom::Generate();
+
+	// set creation and modification times
+	MP4Timestamp now = MP4GetAbsTimestamp();
+	if (version == 1) {
+		((MP4Integer64Property*)m_pProperties[2])->SetValue(now);
+		((MP4Integer64Property*)m_pProperties[3])->SetValue(now);
+	} else {
+		((MP4Integer32Property*)m_pProperties[2])->SetValue(now);
+		((MP4Integer32Property*)m_pProperties[3])->SetValue(now);
+	}
+
+	// property "matrix" has non-zero fixed values
+	// this default identity matrix indicates no transformation, i.e.
+	// 1, 0, 0
+	// 0, 1, 0
+	// 0, 0, 1
+	// see http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap4/chapter_5_section_4.html
+
+	static u_int8_t matrix[36] = {
+		0x00, 0x01, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x00, 0x01, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x00, 0x00, 0x00, 0x00, 
+		0x40, 0x00, 0x00, 0x00, 
+	};
+
+	((MP4BytesProperty*)m_pProperties[10])->
+		SetValue(matrix, sizeof(matrix));
+}
+
+void MP4TkhdAtom::Read() 
+{
+	/* read atom version */
+	ReadProperties(0, 1);
+
+	/* need to create the properties based on the atom version */
+	AddProperties(GetVersion());
+
+	/* now we can read the remaining properties */
+	ReadProperties(1);
+
+	Skip();	// to end of atom
+}