fileformats/mp4/composer/src/esdatom.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.
 * -------------------------------------------------------------------
 */
/*
    This PVA_FF_ESDAtom Class provides the offset between decoding
    time and composition time.
*/


#define IMPLEMENT_ESDAtom

#include "esdatom.h"
#include "a_atomdefs.h"
#include "atomutils.h"

// Constructor
PVA_FF_ESDAtom::PVA_FF_ESDAtom(int32 streamType, int32 codecType)
        : PVA_FF_FullAtom(ESD_ATOM, (uint8)0, (uint32)0)
{

    PV_MP4_FF_NEW(fp->auditCB, PVA_FF_ESDescriptor, (streamType, codecType), _pdescriptor);

    init();
    recomputeSize();

    _pdescriptor->setParent(this);
}

// Destructor
PVA_FF_ESDAtom::~PVA_FF_ESDAtom()
{
    // Cleanup the PVA_FF_ESDescriptor
    PV_MP4_FF_DELETE(NULL, PVA_FF_ESDescriptor, _pdescriptor);
}

// Rendering the PVA_FF_Atom in proper format (bitlengths, etc.) to an ostream
bool
PVA_FF_ESDAtom::renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP *fp)
{
    int32 rendered = 0;

    if (!renderAtomBaseMembers(fp))
    {
        return false;
    }
    rendered += getDefaultSize();

    if (!_pdescriptor->renderToFileStream(fp))
    {
        return false;
    }
    rendered += _pdescriptor->getSizeOfDescriptorObject();

    return true;
}

void
PVA_FF_ESDAtom::init()
{
    // Empty
}

void
PVA_FF_ESDAtom::recomputeSize()
{
    _size = getDefaultSize() + _pdescriptor->getSizeOfDescriptorObject();

    // Update size of parent atom
    if (_pparent != NULL)
    {
        _pparent->recomputeSize();
    }
}