atom_enca.cpp

来自「6410BSP1」· C++ 代码 · 共 62 行

/*
 * 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]
 *        Alix Marchandise-Franquet    [e-mail]
 */

#include "mp4common.h"

MP4EncaAtom::MP4EncaAtom() 
    : MP4Atom("enca") 
{
    AddReserved("reserved1", 6); /* 0 */

    AddProperty( /* 1 */
        new MP4Integer16Property("dataReferenceIndex"));

    AddReserved("reserved2", 16); /* 2 */

    AddProperty( /* 3 */
        new MP4Integer16Property("timeScale"));

    AddReserved("reserved3", 2); /* 4 */

    ExpectChildAtom("esds", Required, OnlyOne);
    ExpectChildAtom("sinf", Required, OnlyOne);
}

void MP4EncaAtom::Generate()
{
    MP4Atom::Generate();

    ((MP4Integer16Property*)m_pProperties[1])->SetValue(1);

    // property reserved2 has non-zero fixed values
    static u_int8_t reserved2[16] = {
        0x00, 0x00, 0x00, 0x00, 
        0x00, 0x00, 0x00, 0x00, 
        0x00, 0x02, 0x00, 0x10,
        0x00, 0x00, 0x00, 0x00, 
    };
    m_pProperties[2]->SetReadOnly(false);
    ((MP4BytesProperty*)m_pProperties[2])->
        SetValue(reserved2, sizeof(reserved2));
    m_pProperties[2]->SetReadOnly(true);
}