chxpckts.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 "hxcppflags.h"

#ifndef HX_CPP_BASIC_TEMPLATES
#include "old_hxpckts.cpp"
#else

/************************************************************************
 *  Defines
 */
#define EXTREME_RTP_TIME    0xFFFFFFFF

#include "hxtypes.h"
#include "hxresult.h"
#include "hxcom.h"
#include "ihxpckts.h"
#include "chxpckts.h"
#include "hlxclib/string.h"

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE
static const char HX_THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////
//	CHXPacket
/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::QueryInterface
//	Purpose:
//		Implement this to export the interfaces supported by your 
//		object.
//
STDMETHODIMP
CHXPacket::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXPacket))
    {
        AddRef();
        *ppvObj = (IHXPacket*)this;
        return HXR_OK;
    }

    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}

/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::AddRef
//	Purpose:
//		Everyone usually implements this the same... feel free to use
//		this implementation.
//
STDMETHODIMP_(ULONG32)
CHXPacket::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::Release
//	Purpose:
//		Everyone usually implements this the same... feel free to use
//		this implementation.
//
STDMETHODIMP_(ULONG32)
CHXPacket::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

/************************************************************************
 *	Method:
 *		IHXPacket::Get
 *	Purpose:
 *		TBD
 */
STDMETHODIMP
CHXPacket::Get(REF(IHXBuffer*)  pBuffer, 
               REF(ULONG32)     ulTime,
               REF(UINT16)      uStreamNumber,
               REF(UINT8)       unASMFlags,
               REF(UINT16)      unASMRuleNumber)
{
    return _Get(pBuffer,
                ulTime,
                uStreamNumber,
                unASMFlags,
                unASMRuleNumber);
}

/************************************************************************
 *	Method:
 *		IHXPacket::GetBuffer
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(IHXBuffer*)
CHXPacket::GetBuffer()
{
    // Whenever a COM object is returned out of an
    // interface, it should be AddRef()'d.
    if (m_pBuffer) m_pBuffer->AddRef();
    return m_pBuffer; 
}

/************************************************************************
 *	Method:
 *		IHXPacket::GetTime
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(ULONG32)
CHXPacket::GetTime()
{
    return m_ulTime;
}

/************************************************************************
 *	Method:
 *		IHXPacket::GetFlags
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(UINT8)
CHXPacket::GetASMFlags()
{
    return m_unASMFlags;
}

/************************************************************************
 *	Method:
 *		IHXPacket::GetStreamNumber
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(UINT16)
CHXPacket::GetStreamNumber()
{
    return m_uStreamNumber;
}

/************************************************************************
 *	Method:
 *		IHXPacket::GetASMRuleNumber
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(UINT16)
CHXPacket::GetASMRuleNumber()
{
    return m_unASMRuleNumber;
}

/************************************************************************
 *	Method:
 *		IHXPacket::IsLost
 *	Purpose:
 *		TBD
 */
STDMETHODIMP_(BOOL)
CHXPacket::IsLost()
{ 
    return m_bIsLost;
}

/************************************************************************
 *	Method:
 *		IHXPacket::SetAsLost
 *	Purpose:
 *		TBD
 */
STDMETHODIMP
CHXPacket::SetAsLost()
{
    HX_ASSERT(m_pBuffer == NULL);

    // Dropped packets are allowed to have a non-zero timestamp
    if (!(m_unASMFlags & HX_ASM_DROPPED_PKT))
    {
	HX_ASSERT(m_ulTime == 0);
    }

    if (m_pBuffer)
    {
        return HXR_UNEXPECTED;
    }

    m_bIsLost = TRUE;
    return HXR_OK; 
}

/************************************************************************
 *	Method:
 *		IHXPacket::Set
 *	Purpose:
 *		TBD
 */
STDMETHODIMP
CHXPacket::Set (IHXBuffer*  pBuffer, 
                ULONG32     ulTime,
                UINT16      uStreamNumber,
                UINT8       unASMFlags,
                UINT16      unASMRuleNumber
)
{
    return _Set(pBuffer, 
                ulTime,
                uStreamNumber,
                unASMFlags,
                unASMRuleNumber);
}

/************************************************************************
 *	Method:
 *		IHXRTPPacket::GetRTP
 */
STDMETHODIMP
CHXPacket::GetRTP(REF(IHXBuffer*) pBuffer, 
                  REF(ULONG32)    ulTime,
                  REF(ULONG32)    ulRTPTime,
                  REF(UINT16)     uStreamNumber,
                  REF(UINT8)      unASMFlags,
                  REF(UINT16)     unASMRuleNumber)
{
    HX_ASSERT(HXR_UNEXPECTED == HXR_OK);
    return HXR_UNEXPECTED;
}

/************************************************************************
 *	Method:
 *		IHXRTPPacket::GetRTPTime
 */
STDMETHODIMP_(ULONG32)
CHXPacket::GetRTPTime()
{
    HX_ASSERT(HXR_UNEXPECTED == HXR_OK);
    return EXTREME_RTP_TIME;
}

/************************************************************************
 *	Method:
 *		IHXRTPPacket::SetRTP
 */
STDMETHODIMP
CHXPacket::SetRTP (IHXBuffer* pBuffer, 
                   ULONG32    ulTime,
                   ULONG32    ulRTPTime,
                   UINT16     uStreamNumber,
                   UINT8      unASMFlags,
                   UINT16     unASMRuleNumber)
{
    HX_ASSERT(HXR_UNEXPECTED == HXR_OK);
    return HXR_UNEXPECTED;
}

inline HX_RESULT
CHXPacket::_Get(IHXBuffer*  &pBuffer,
                ULONG32     &ulTime,
                UINT16      &uStreamNumber,
                UINT8       &unASMFlags,
                UINT16      &unASMRuleNumber)
{
    pBuffer         = m_pBuffer;
    ulTime          = m_ulTime;
    uStreamNumber   = m_uStreamNumber;
    unASMFlags      = m_unASMFlags;
    unASMRuleNumber = m_unASMRuleNumber;

    // Whenever a COM object is returned out of an
    // interface, it should be AddRef()'d.
    if (m_pBuffer) m_pBuffer->AddRef();

    return HXR_OK;
}

inline HX_RESULT
CHXPacket::_Set(IHXBuffer*  pBuffer, 
                ULONG32     ulTime,
                UINT16      uStreamNumber,
                UINT8       unASMFlags,
                UINT16      unASMRuleNumber)
{
    /* We allow changing the packet info when it is owned
     * by atmost one user.
     */
    if (m_lRefCount > 1)
    {
        HX_ASSERT(FALSE);
        return HXR_UNEXPECTED;
    }

    if (m_pBuffer)
    {
        m_pBuffer->Release();
    }
    m_pBuffer = pBuffer;
    if (m_pBuffer)
    {
        m_pBuffer->AddRef();
    }

    m_ulTime            = ulTime;
    m_uStreamNumber     = uStreamNumber;
    m_unASMFlags        = unASMFlags;
    m_unASMRuleNumber   = unASMRuleNumber;

    return HXR_OK;
}

// serialization method
void
CHXPacket::Pack(IHXPacket* pPacket, char* pData, UINT32& ulSize)
{
    UINT16      uValue = 0;
    UINT32      ulValue = 0;
    UINT32      ulBufferSize = 0;
    IHXBuffer*  pBuffer = NULL;

    if (!pPacket)
    {
        goto cleanup;
    }

    pBuffer = pPacket->GetBuffer();

    if (pBuffer)
    {
        ulBufferSize = pBuffer->GetSize();
    }

    // figure out the size 
    if (!pData)
    {
        ulSize = sizeof(HXPacketInfo) + ulBufferSize;
    }
    // pack the data
    else
    {
        *pData++ = (BYTE)pPacket->IsLost();					ulSize++;
        *pData++ = (BYTE)pPacket->GetASMFlags();				ulSize++;

        uValue = pPacket->GetASMRuleNumber();
        *pData++ = (BYTE)uValue; *pData++ = (BYTE)(uValue >> 8); 		ulSize += 2;

        uValue = pPacket->GetStreamNumber();
        *pData++ = (BYTE)uValue; *pData++ = (BYTE)(uValue >> 8); 		ulSize += 2;

        ulValue = pPacket->GetTime();
        *pData++ = (BYTE)ulValue; *pData++ = (BYTE)(ulValue >> 8);
        *pData++ = (BYTE)(ulValue >> 16); *pData++ = (BYTE)(ulValue >> 24);	ulSize += 4;

        if (pBuffer)
        {
            memcpy(pData, (char*)pBuffer->GetBuffer(), ulBufferSize); /* Flawfinder: ignore */
            pData += ulBufferSize;						ulSize += ulBufferSize;
        }
    }

cleanup:

    HX_RELEASE(pBuffer);

    return;
}   

void
CHXPacket::UnPack(IHXPacket*& pPacket, char* pData, UINT32 ulSize)
{
    UINT16          uValue = 0;
    UINT32          ulValue = 0;
    IHXBuffer*      pBuffer = NULL;
    HXPacketInfo   packetInfo;

    pPacket = NULL;

    if (!pData || !ulSize)
    {
        goto cleanup;
    }

    HX_ASSERT(ulSize >= sizeof(HXPacketInfo));

    packetInfo.lost = (BYTE)*pData++;	    ulSize--;
    packetInfo.ASMFlags = (BYTE)*pData++;   ulSize--;

    uValue = (BYTE)*pData++; uValue |= (((BYTE)*pData++) << 8);
    packetInfo.ASMRuleNumber = uValue;	    ulSize -= 2;

    uValue = (BYTE)*pData++; uValue |= (((BYTE)*pData++) << 8);
    packetInfo.streamNum = uValue;	    ulSize -= 2;

    ulValue = (BYTE)*pData++; ulValue |= (((BYTE)*pData++) << 8);
    ulValue |= (((BYTE)*pData++) << 16); ulValue |= (((BYTE)*pData++) << 24);
    packetInfo.time = ulValue;		    ulSize -= 4;

    if (ulSize)
    {
        pBuffer = new CHXBuffer();
        pBuffer->AddRef();

        pBuffer->Set((const UCHAR*)pData, ulSize);
    }
        
    pPacket = new CHXPacket();
    pPacket->AddRef();

    pPacket->Set(pBuffer, 
                 packetInfo.time, 
                 packetInfo.streamNum,
                 packetInfo.ASMFlags,
                 packetInfo.ASMRuleNumber);

    if (packetInfo.lost)
    {
        pPacket->SetAsLost();
    }

cleanup:

    HX_RELEASE(pBuffer);

    return;
}

/////////////////////////////////////////////////////////////////////////
//	CHXRTPPacket
/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::QueryInterface
//	Purpose:
//		Implement this to export the interfaces supported by your 
//		object.
//
STDMETHODIMP
CHXRTPPacket::QueryInterface(REFIID riid, void** ppvObj)
{
	QInterfaceList qiList[] =
	{
		{ GET_IIDHANDLE(IID_IUnknown), this },
		{ GET_IIDHANDLE(IID_IHXRTPPacket), (IHXRTPPacket*) this },
		{ GET_IIDHANDLE(IID_IHXPacket), (IHXPacket*) this },
	};	
    return QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);   
}

/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::Release
//	Purpose:
//		Everyone usually implements this the same... feel free to use
//		this implementation.
//
STDMETHODIMP_(ULONG32)
CHXRTPPacket::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;