src/atom_amr.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.
 *
 * 3GPP features implementation is based on 3GPP's TS26.234-v5.60,
 * and was contributed by Ximpo Group Ltd.
 *
 * Portions created by Ximpo Group Ltd. are
 * Copyright (C) Ximpo Group Ltd. 2003, 2004.  All Rights Reserved.
 *
 * Contributor(s):
 *              Ximpo Group Ltd.          mp4v2@ximpo.com
 */

#include "src/impl.h"

namespace mp4v2 {
namespace impl {

///////////////////////////////////////////////////////////////////////////////

MP4AmrAtom::MP4AmrAtom(MP4File &file, const char *type)
        : MP4Atom(file, type)
{
    AddReserved(*this,"reserved1", 6); /* 0 */

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

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

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

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

    ExpectChildAtom("damr", Required, OnlyOne);
}

void MP4AmrAtom::Generate()
{
    MP4Atom::Generate();

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

    // property reserved2 has non-zero fixed values
    static uint8_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);
}

///////////////////////////////////////////////////////////////////////////////

}
} // namespace mp4v2::impl