ref: 4dfc6c8fa70d3109591a1f51cf0d8a7849aeb4dd
dir: /common/mp4v2/atom_hdlr.cpp/
/* * 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 [email protected] */ #include "mp4common.h" MP4HdlrAtom::MP4HdlrAtom() : MP4Atom("hdlr") { AddVersionAndFlags(); /* 0, 1 */ AddReserved("reserved1", 4); /* 2 */ MP4StringProperty* pProp = new MP4StringProperty("handlerType"); pProp->SetFixedLength(4); AddProperty(pProp); /* 3 */ AddReserved("reserved2", 12); /* 4 */ AddProperty( /* 5 */ new MP4StringProperty("name")); } // There is a spec incompatiblity between QT and MP4 // QT says name field is a counted string // MP4 says name field is a null terminated string // Here we attempt to make all things work void MP4HdlrAtom::Read() { // read all the properties but the "name" field ReadProperties(0, 5); // take a peek at the next byte u_int8_t strLength; m_pFile->PeekBytes(&strLength, 1); // if the value matches the remaining atom length if (m_pFile->GetPosition() + strLength + 1 == GetEnd()) { // read a counted string MP4StringProperty* pNameProp = (MP4StringProperty*)m_pProperties[5]; pNameProp->SetCountedFormat(true); ReadProperties(5); pNameProp->SetCountedFormat(false); } else { // read a null terminated string ReadProperties(5); } Skip(); // to end of atom }