atom_ftyp.cpp

6410BSP1

/*
 * 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        [e-mail]
 */

#include "mp4common.h"

MP4FtypAtom::MP4FtypAtom() 
    : MP4Atom("ftyp")
{
    MP4StringProperty* pProp = new MP4StringProperty("majorBrand");
    pProp->SetFixedLength(4);
    AddProperty(pProp); /* 0 */

    AddProperty( /* 1 */
        new MP4Integer32Property("minorVersion"));

    MP4Integer32Property* pCount = 
        new MP4Integer32Property("compatibleBrandsCount"); 
    pCount->SetImplicit();
    AddProperty(pCount); /* 2 */

    MP4TableProperty* pTable = 
        new MP4TableProperty("compatibleBrands", pCount);
    AddProperty(pTable); /* 3 */

    pProp = new MP4StringProperty("brand");
    pProp->SetFixedLength(4);
    pTable->AddProperty(pProp);
}

void MP4FtypAtom::Generate() 
{
    MP4Atom::Generate();

    ((MP4StringProperty*)m_pProperties[0])->SetValue("mp42");

    MP4StringProperty* pBrandProperty = (MP4StringProperty*)
        ((MP4TableProperty*)m_pProperties[3])->GetProperty(0);
    ASSERT(pBrandProperty);
    pBrandProperty->AddValue("mp42");
    pBrandProperty->AddValue("isom");
    ((MP4Integer32Property*)m_pProperties[2])->IncrementValue();
    ((MP4Integer32Property*)m_pProperties[2])->IncrementValue();
}

void MP4FtypAtom::Read() 
{
    // table entry count computed from atom size
    ((MP4Integer32Property*)m_pProperties[2])->SetReadOnly(false);
    ((MP4Integer32Property*)m_pProperties[2])->SetValue((m_size - 8) / 4);
    ((MP4Integer32Property*)m_pProperties[2])->SetReadOnly(true);

    MP4Atom::Read();
}