fileformats/mp4/parser/src/videomediaheaderatom.cpp

/* ------------------------------------------------------------------
 * Copyright (C) 1998-2009 PacketVideo
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 * -------------------------------------------------------------------
 */
/*********************************************************************************/
/*     -------------------------------------------------------------------       */
/*                      MPEG-4 VideoMediaHeaderAtom Class                        */
/*     -------------------------------------------------------------------       */
/*********************************************************************************/
/*
    This VideoMediaHeaderAtom Class contains general presentation information,
    independent of coding, about the visual media within the stream.
*/


#define IMPLEMENT_VideoMediaHeaderAtom

#include "videomediaheaderatom.h"
#include "atomutils.h"
#include "atomdefs.h"

// Stream-in ctor
VideoMediaHeaderAtom::VideoMediaHeaderAtom(MP4_FF_FILE *fp, uint32 size, uint32 type)
        : MediaInformationHeaderAtom(fp, size, type)
{
    if (_success)
    {

        // Read the 8 bytes of reserved data
        if (!AtomUtils::read64(fp, _reserved))
        {
            _success = false;
            _mp4ErrorCode = READ_VIDEO_MEDIA_HEADER_ATOM_FAILED;
        }
    }
    else
    {
        if (_mp4ErrorCode != ATOM_VERSION_NOT_SUPPORTED)
            _mp4ErrorCode = READ_VIDEO_MEDIA_HEADER_ATOM_FAILED;
    }
}

// Destructor
VideoMediaHeaderAtom::~VideoMediaHeaderAtom()
{
    // Empty
}

uint32
VideoMediaHeaderAtom::getMediaInformationHeaderType() const
{
    return (uint32)MEDIA_INFORMATION_HEADER_TYPE_VISUAL;
}