dunit.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#include "hlxclib/memory.h"

#include "hxresult.h"

#include "hxacodec.h"
#include "dunitprvt.h"

CDecoderUnit::CDecoderUnit()
 : mSize(0)
 , mSamples(0)
 , mpData(0)
 , mDataMaxsize(0)
 , mBufferFullness(0)
 , mFlags((FLAGS)0)
 , m_lRefCount(0)
{
}

CDecoderUnit::~CDecoderUnit()
{
    if (mpData) delete[] mpData;
}

/****************************************************************************
 *  IUnknown methods
 */
/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::QueryInterface
//
STDMETHODIMP CDecoderUnit::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IQueryDecoderUnit))
    {
        AddRef();
        *ppvObj = (IQueryDecoderUnit*) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IPrepareDecoderUnit))
    {
        AddRef();
        *ppvObj = (IPrepareDecoderUnit*) this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = this;
        return HXR_OK;
    }
    
    *ppvObj = NULL;
    
    return HXR_NOINTERFACE;
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::AddRef
//
STDMETHODIMP_(ULONG32) CDecoderUnit::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::Release
//
STDMETHODIMP_(ULONG32) CDecoderUnit::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

STDMETHODIMP CDecoderUnit::getData(const char *&data, UINT32& size, UINT32& nSamples) CONSTMETHOD
{
    data = mpData ;
    size = mSize ;
    nSamples = mSamples ;

    return HXR_OK ;
}

STDMETHODIMP CDecoderUnit::putData(const char *data, UINT32 nBytes, UINT32 nSamples)
{
    if (nBytes > mDataMaxsize)
    {
        if (mpData) delete[] mpData ;
        mpData = new char[mDataMaxsize = 2*nBytes] ;
        if (!mpData) return HXR_OUTOFMEMORY ;
    }
    memcpy(mpData, data, nBytes) ; /* Flawfinder: ignore */
    mSize = nBytes ;
    mSamples = nSamples ;

    return HXR_OK ;
}

STDMETHODIMP_(INT32) CDecoderUnit::getBufferFullness() CONSTMETHOD
{
    return mBufferFullness ;
}

STDMETHODIMP CDecoderUnit::setBufferFullness(INT32 bfm)
{
    mBufferFullness = bfm ;
    return HXR_OK ;
}

STDMETHODIMP_(CDecoderUnit::FLAGS) CDecoderUnit::getFlags(void) const
{
    return mFlags ;
}

STDMETHODIMP CDecoderUnit::setFlags(FLAGS f)
{
    mFlags = f ;
    return HXR_OK ;
}