Initial community commit

Src/external_dependencies/libmp4v2/atom_text.cpp

@@ -0,0 +1,128 @@
+/*
+ * 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.
+ * 
+ * Contributer has declined to give copyright information, and gives
+ * it freely to the world.
+ */
+
+#include "mp4common.h"
+
+MP4TextAtom::MP4TextAtom() 
+	: MP4Atom("text") 
+{
+	// The atom type "text" is used in two complete unrelated ways
+	// i.e. it's real two atoms with the same name
+	// To handle that we need to postpone property creation until
+	// we know who our parent atom is (stsd or gmhd) which gives us
+	// the context info we need to know who we are
+}
+
+void MP4TextAtom::AddPropertiesStsdType()
+{
+
+	AddReserved("reserved1", 6); /* 0 */
+
+	AddProperty(new MP4Integer16Property("dataReferenceIndex"));/* 1 */
+
+	AddProperty(new MP4Integer32Property("displayFlags")); /* 2 */
+	AddProperty(new MP4Integer32Property("textJustification")); /* 3 */
+
+	AddProperty(new MP4Integer16Property("bgColorRed")); /* 4 */
+	AddProperty(new MP4Integer16Property("bgColorGreen")); /* 5 */
+	AddProperty(new MP4Integer16Property("bgColorBlue")); /* 6 */
+
+	AddProperty(new MP4Integer16Property("defTextBoxTop")); /* 7 */
+	AddProperty(new MP4Integer16Property("defTextBoxLeft")); /* 8 */
+	AddProperty(new MP4Integer16Property("defTextBoxBottom")); /* 9 */
+	AddProperty(new MP4Integer16Property("defTextBoxRight")); /* 10 */
+
+	AddReserved("reserved2", 8); /* 11 */
+
+	AddProperty(new MP4Integer16Property("fontNumber")); /* 12 */
+	AddProperty(new MP4Integer16Property("fontFace")); /* 13 */
+
+	AddReserved("reserved3", 1); /* 14 */
+	AddReserved("reserved4", 2); /* 15 */
+
+	AddProperty(new MP4Integer16Property("foreColorRed")); /* 16 */
+	AddProperty(new MP4Integer16Property("foreColorGreen")); /* 17 */
+	AddProperty(new MP4Integer16Property("foreColorBlue")); /* 18 */
+
+}
+
+void MP4TextAtom::AddPropertiesGmhdType()
+{
+
+	AddProperty(new MP4BytesProperty("textData", 36)); /* 0 */
+
+}
+
+
+void MP4TextAtom::Generate()
+{
+
+	if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
+		AddPropertiesStsdType();
+		GenerateStsdType();
+	} else if (!strcmp(m_pParentAtom->GetType(), "gmhd")) {
+		AddPropertiesGmhdType();
+		GenerateGmhdType();
+	} else {
+		VERBOSE_WARNING(m_pFile->GetVerbosity(),
+			printf("Warning: text atom in unexpected context, can not generate"));
+	}
+
+}
+
+void MP4TextAtom::GenerateStsdType() 
+{
+	// generate children
+	MP4Atom::Generate();
+
+	((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
+
+	((MP4Integer32Property*)m_pProperties[2])->SetValue(1);
+	((MP4Integer32Property*)m_pProperties[3])->SetValue(1);
+
+}
+
+void MP4TextAtom::GenerateGmhdType() 
+{
+	MP4Atom::Generate();
+
+	// property 0 has non-zero fixed values
+	static u_int8_t textData[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[0])->SetValue(textData, sizeof(textData));
+	
+}
+
+