129 lines
3.3 KiB
C++
129 lines
3.3 KiB
C++
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is MPEG4IP.
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*
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* Contributer has declined to give copyright information, and gives
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* it freely to the world.
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*/
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#include "mp4common.h"
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MP4TextAtom::MP4TextAtom()
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: MP4Atom("text")
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{
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// The atom type "text" is used in two complete unrelated ways
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// i.e. it's real two atoms with the same name
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// To handle that we need to postpone property creation until
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// we know who our parent atom is (stsd or gmhd) which gives us
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// the context info we need to know who we are
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}
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void MP4TextAtom::AddPropertiesStsdType()
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{
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AddReserved("reserved1", 6); /* 0 */
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AddProperty(new MP4Integer16Property("dataReferenceIndex"));/* 1 */
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AddProperty(new MP4Integer32Property("displayFlags")); /* 2 */
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AddProperty(new MP4Integer32Property("textJustification")); /* 3 */
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AddProperty(new MP4Integer16Property("bgColorRed")); /* 4 */
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AddProperty(new MP4Integer16Property("bgColorGreen")); /* 5 */
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AddProperty(new MP4Integer16Property("bgColorBlue")); /* 6 */
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AddProperty(new MP4Integer16Property("defTextBoxTop")); /* 7 */
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AddProperty(new MP4Integer16Property("defTextBoxLeft")); /* 8 */
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AddProperty(new MP4Integer16Property("defTextBoxBottom")); /* 9 */
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AddProperty(new MP4Integer16Property("defTextBoxRight")); /* 10 */
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AddReserved("reserved2", 8); /* 11 */
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AddProperty(new MP4Integer16Property("fontNumber")); /* 12 */
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AddProperty(new MP4Integer16Property("fontFace")); /* 13 */
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AddReserved("reserved3", 1); /* 14 */
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AddReserved("reserved4", 2); /* 15 */
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AddProperty(new MP4Integer16Property("foreColorRed")); /* 16 */
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AddProperty(new MP4Integer16Property("foreColorGreen")); /* 17 */
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AddProperty(new MP4Integer16Property("foreColorBlue")); /* 18 */
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}
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void MP4TextAtom::AddPropertiesGmhdType()
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{
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AddProperty(new MP4BytesProperty("textData", 36)); /* 0 */
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}
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void MP4TextAtom::Generate()
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{
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if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
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AddPropertiesStsdType();
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GenerateStsdType();
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} else if (!strcmp(m_pParentAtom->GetType(), "gmhd")) {
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AddPropertiesGmhdType();
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GenerateGmhdType();
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} else {
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VERBOSE_WARNING(m_pFile->GetVerbosity(),
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printf("Warning: text atom in unexpected context, can not generate"));
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}
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}
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void MP4TextAtom::GenerateStsdType()
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{
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// generate children
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MP4Atom::Generate();
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((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
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((MP4Integer32Property*)m_pProperties[2])->SetValue(1);
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((MP4Integer32Property*)m_pProperties[3])->SetValue(1);
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}
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void MP4TextAtom::GenerateGmhdType()
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{
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MP4Atom::Generate();
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// property 0 has non-zero fixed values
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static u_int8_t textData[36] = {
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0x00, 0x01,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x01,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x00, 0x00,
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0x40, 0x00,
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0x00, 0x00,
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};
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((MP4BytesProperty*)m_pProperties[0])->SetValue(textData, sizeof(textData));
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}
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