fileformats/mp4/composer/src/amrsampleentry.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_AudioSampleEntry Class is used for visual streams.
*/

#define IMPLEMENT_AMRSampleEntry

#include "amrsampleentry.h"
#include "atomutils.h"
#include "a_atomdefs.h"

// Constructor
PVA_FF_AMRSampleEntry::PVA_FF_AMRSampleEntry()
        : PVA_FF_SampleEntry(FourCharConstToUint32('s', 'a', 'm', 'r'))
{
    init();
    recomputeSize();
}

// Destructor
PVA_FF_AMRSampleEntry::~PVA_FF_AMRSampleEntry()
{
    PV_MP4_FF_DELETE(NULL, PVA_FF_AMRSpecificAtom, pAMRSpecificAtom);
}


void
PVA_FF_AMRSampleEntry::init()
{
    _reserved1[0] = 0;
    _reserved1[1] = 0;

    _reserved2 = 2;
    _reserved3 = 16;
    _reserved4 = 0;

    _timeScale = 0;

    _reserved5 = 0;

    PV_MP4_FF_NEW(fp->auditCB, PVA_FF_AMRSpecificAtom, (), pAMRSpecificAtom);

    pAMRSpecificAtom->setVendorcode();
    pAMRSpecificAtom->setEncoderVersion();
    pAMRSpecificAtom->setModeChangePeriod();
    pAMRSpecificAtom->setFramesPerSample(1);
}

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

    renderAtomBaseMembers(fp);
    rendered += getDefaultSize();

    // From PVA_FF_SampleEntry base class
    for (int32 i = 0; i < 6; i++)
    {
        if (!PVA_FF_AtomUtils::render8(fp, _reserved[i]))
        {
            return false;
        }
        rendered += 1;
    }

    if (!PVA_FF_AtomUtils::render16(fp, _dataReferenceIndex))
    {
        return false;
    }

    if (!PVA_FF_AtomUtils::render32(fp, _reserved1[0]))
    {
        return false;
    }

    if (!PVA_FF_AtomUtils::render32(fp, _reserved1[1]))
    {
        return false;
    }
    rendered += 8;

    if (!PVA_FF_AtomUtils::render16(fp, _reserved2))
    {
        return false;
    }
    if (!PVA_FF_AtomUtils::render16(fp, _reserved3))
    {
        return false;
    }
    if (!PVA_FF_AtomUtils::render32(fp, _reserved4))
    {
        return false;
    }
    rendered += 8;

    if (!PVA_FF_AtomUtils::render16(fp, _timeScale))
    {
        return false;
    }
    rendered += 2;

    if (!PVA_FF_AtomUtils::render16(fp, _reserved5))
    {
        return false;
    }
    rendered += 2;

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

    return true;
}

void
PVA_FF_AMRSampleEntry::recomputeSize()
{
    int32 size = getDefaultSize();

    size += 8; // For reserved and dataRefIndex of PVA_FF_SampleEntry base class

    size += 16; // For reserved1 - reserved4
    size += 2; // For timescale
    size += 2; // For reserved5
    size += pAMRSpecificAtom->getSize();

    _size = size;

    if (_pparent != NULL)
    {
        _pparent->recomputeSize();
    }
}