src/atom_d263.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 {

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

#define H263_VENDOR 0x6d346970

MP4D263Atom::MP4D263Atom(MP4File &file)
        : MP4Atom(file, "d263")
{
    AddProperty( /* 0 */
        new MP4Integer32Property(*this, "vendor"));

    AddProperty( /* 1 */
        new MP4Integer8Property(*this, "decoderVersion"));

    AddProperty( /* 2 */
        new MP4Integer8Property(*this, "h263Level"));

    AddProperty( /* 3 */
        new MP4Integer8Property(*this, "h263Profile"));

    ExpectChildAtom("bitr", Optional, OnlyOne);

}

void MP4D263Atom::Generate()
{
    MP4Atom::Generate();

    ((MP4Integer32Property*)m_pProperties[0])->SetValue(H263_VENDOR);
    ((MP4Integer8Property*)m_pProperties[1])->SetValue(1);

}

void MP4D263Atom::Write()
{
    // Check whether we have valid values in the bitr atom
    // (if it exists, of course)
    MP4Atom* bitrAtom = FindAtom("d263.bitr");
    if (bitrAtom) {
        uint32_t avgBitrate;
        uint32_t maxBitrate;

        MP4Integer32Property* pProp;
        bitrAtom->FindProperty("bitr.avgBitrate",
                               (MP4Property**)&pProp,
                               NULL);
        ASSERT(pProp);
        avgBitrate = pProp->GetValue();

        bitrAtom->FindProperty("bitr.maxBitrate",
                               (MP4Property**)&pProp,
                               NULL);
        ASSERT(pProp);
        maxBitrate = pProp->GetValue();

        if (!maxBitrate && !avgBitrate) {
            DeleteChildAtom(bitrAtom);
        }
    }

    MP4Atom::Write();
}

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

}
} // namespace mp4v2::impl