rtspbase.cpp

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

    MIMEHeader*       pMimeHeader;
    const char*       pName = NULL;
    IHXBuffer*       pValue = NULL;
    IHXKeyValueList* pKeyedHdrs;

    if (!pRFC822Headers)
    {
	return;
    }

    // Find out if the IHXValues supports IHXKeyValueList
    // XXX showell - eventually, we should just make all callers
    // give us an IHXKeyValueList, since it's more efficient,
    // and so we don't overwrite duplicate headers.
    res = pRFC822Headers->QueryInterface(IID_IHXKeyValueList, 
					 (void**) &pKeyedHdrs);

    if (res == HXR_OK)
    {
	IHXKeyValueListIter* pListIter = NULL;
	pKeyedHdrs->GetIter(pListIter);
	HX_ASSERT(pListIter);

	while (pListIter->GetNextPair(pName, pValue) == HXR_OK)
	{
	    pMimeHeader = new MIMEHeader(pName);
	    pMimeHeader->addHeaderValue((char*)pValue->GetBuffer());
	    pMsg->addHeader(pMimeHeader);
	    HX_RELEASE(pValue);
	}
	HX_RELEASE(pListIter);
    }
    else
    {
	res = pRFC822Headers->GetFirstPropertyCString(pName, pValue);
	while (res == HXR_OK)
	{
	    pMimeHeader = new MIMEHeader(pName);
	    pMimeHeader->addHeaderValue((char*)pValue->GetBuffer());
	    pMsg->addHeader(pMimeHeader);
	    pValue->Release();

	    res = pRFC822Headers->GetNextPropertyCString(pName, pValue);
	}
    }

    HX_RELEASE(pKeyedHdrs);
}

void
RTSPBaseProtocol::getRFC822Headers(RTSPMessage* pMsg,
    REF(IHXValues*) pRFC822Headers)
{
    MIMEHeader*		pHeader = NULL;
    IUnknown*		pUnknown = NULL;
    IHXKeyValueList*	pList = NULL;

    pRFC822Headers = NULL;

    if (!m_pCommonClassFactory)
    {
	goto cleanup;
    }

    if (HXR_OK != m_pCommonClassFactory->CreateInstance(CLSID_IHXKeyValueList,
							(void**) &pUnknown))
    {
	goto cleanup;
    }

    if (HXR_OK != pUnknown->QueryInterface(IID_IHXKeyValueList, 
					   (void**) &pList))
    {
	goto cleanup;
    }

    pHeader = pMsg->getFirstHeader();

    while (pHeader)
    {
	MIMEHeaderValue* pHeaderValue;

	/*
	 * XXX...There is way too much memcpy() going on here
	 */

	pHeaderValue = pHeader->getFirstHeaderValue();

	CHXString HeaderString;

	while (pHeaderValue)
	{
	    CHXString TempString;

	    pHeaderValue->asString(TempString);
	    HeaderString += TempString;
	    pHeaderValue = pHeader->getNextHeaderValue();
	    if (pHeaderValue)
	    {
		HeaderString += ", ";
	    }
	}

	IHXBuffer *pBuffer = NULL;
	CHXBuffer::FromCharArray((const char*) HeaderString, &pBuffer);

	pList->AddKeyValue(pHeader->name(), pBuffer);

	HX_RELEASE(pBuffer);

	pHeader = pMsg->getNextHeader();
    }

    // XXX showell - Yet another item for rnvalues cleanup phase II.  We should
    // just change this function so its callers don't expect IHXValues, since
    // the IHXKeyValueList interface is better for header data.
    if (HXR_OK != pList->QueryInterface(IID_IHXValues,
					(void**) &pRFC822Headers))
    {
	pRFC822Headers = NULL;
    }

cleanup:

    HX_RELEASE(pList);
    HX_RELEASE(pUnknown);
}

HX_RESULT
RTSPBaseProtocol::sendControlMessage(IHXBuffer* pBuffer)
{
    HX_RESULT hxr = HXR_OK;

    handleDebug(pBuffer, FALSE);
    handleTiming(pBuffer, FALSE);

    if (!m_pSocket)
    {
        m_pControlBuffer = pBuffer;
        m_pControlBuffer->AddRef();
        hxr = reopenSocket();
    }
    else
    {
        m_uControlBytesSent += pBuffer->GetSize();
        if (m_pFastSocket)
        {
            hxr = m_pFastSocket->BufferedWrite(pBuffer);
            m_pFastSocket->FlushWrite();
        }
        else
        {
            hxr = m_pSocket->Write(pBuffer);
        }
    }

    return hxr;
}

HX_RESULT
RTSPBaseProtocol::handleACK(IHXPacketResend* pPacketResend,
			    RTSPResendBuffer* pResendBuffer,
			    UINT16 uStreamNumber,
			    UINT16* pAckList,
			    UINT32 uAckListCount,
			    UINT16* pNakList,
			    UINT32 uNakListCount,
			    BOOL bIgnoreACK)
{
    if (!pResendBuffer)
    {
	return HXR_UNEXPECTED;
    }

    /*
     * ACKs and NAKs only have meaning for resend buffers
     *
     * NOTE: keep the ACKing/NAKing in order by starting at the back of
     *       the lists
     */

        
    INT32 i;
    
    if (!bIgnoreACK)
    {
	for (i = uAckListCount - 1; i >= 0; i--)
	{
	    pResendBuffer->Remove(pAckList[i]);
	}
    }	
    

    if (uNakListCount)
    {
	//XXXGH...must be BasePacket
	BasePacket** ppPacket = new BasePacket*[uNakListCount + 1];

	/*
	 * Only allow 10 packets to be resent
	 */

	UINT16 j = 0;
	for (i = uNakListCount - 1; i >= 0 && j < 10; i--)
	{
	    BasePacket* pPacket;

	    pPacket = pResendBuffer->Find(pNakList[i], TRUE);

	    if (pPacket)
	    {
		ppPacket[j++] = pPacket;
		pPacket->AddRef();
	    }
	}
	ppPacket[j] = 0;

	//XXX..will the BasePacket have the stream number in it?
	pPacketResend->OnPacket(uStreamNumber, ppPacket);

	BasePacket* pReleasePacket = NULL;
	BasePacket** ppReleasePacket = ppPacket;

	for (; (pReleasePacket = *ppReleasePacket); ppReleasePacket++)
	{
	    HX_RELEASE(pReleasePacket);
	}     

	HX_VECTOR_DELETE(ppPacket);
    }

    return HXR_OK;
}

/*
 *  The grammer in RFC2326, I think, is wrong....But in any case, there is no 
 *  gurantee seq_no and rtptime are present in RTP-Info.
 */
RTPInfoEnum
RTSPBaseProtocol::parseRTPInfoHeader(
    MIMEHeaderValue* pSeqValue, UINT16& streamID, UINT16& seqNum,
    UINT32& ulTimestamp, const char*& pControl)
{
    BOOL bFoundSeqNo = FALSE;
    BOOL bFoundRTPTime = FALSE;

    MIMEParameter* pParam = pSeqValue->getFirstParameter();
    while (pParam != NULL)
    {
	if(pParam->m_attribute == "url")
	{
	    // Note: We don't currently do anything with the first section
	    // of the "url" attribute (the actual player-requested URL). If
	    // we ever do, please note that all ';' characters were escaped 
	    // by the server when this message was created, because ';' has
	    // special meaning as a delimiter in this message. Remember to
	    // unescape all instances of "%3b" to ";" before using the URL.

	    const char* pUrl = (const char*) pParam->m_value;
	    const char* pEq  = strrchr(pUrl, '=');
	    if (pEq != NULL)
	    {
		streamID = (UINT16)strtol(pEq + 1, 0, 10);
	    }

	    // take the control string...
	    pControl = pUrl;
	}
	else if(pParam->m_attribute == "seq")
	{
	    bFoundSeqNo = TRUE;
	    seqNum = (UINT16)strtol((const char*)pParam->m_value,0,10);
	}
	else if(pParam->m_attribute == "rtptime")
	{
	    bFoundRTPTime = TRUE;
	    ulTimestamp = (UINT32)strtoul((const char*)pParam->m_value, 0, 10);
	}

	pParam = pSeqValue->getNextParameter();
    }

    if (bFoundSeqNo)
    {
	if (bFoundRTPTime)
	{
	    return RTPINFO_SEQ_RTPTIME;
	}

	return RTPINFO_SEQ;
    }

    if (bFoundRTPTime)
    {
	return RTPINFO_RTPTIME;
    }

    return RTPINFO_EMPTY;
}

BOOL 
RTSPBaseProtocol::isRequired(RTSPMessage* pRTSPMessageToSearch, 
			     UINT32 ulOptionToFind)
{
    BOOL bRetainState = FALSE;
    MIMEHeader* pMIMEHeaderRequire;
    pMIMEHeaderRequire = pRTSPMessageToSearch->getHeader("Require");

    // If a require header was found
    if (pMIMEHeaderRequire != NULL)
    {
	MIMEHeaderValue* pMIMEHeaderValueRequire =
	    pMIMEHeaderRequire->getFirstHeaderValue();

	while (pMIMEHeaderValueRequire != NULL)
	{
	    if (!strcasecmp(RTSPRequireOptionsTable[ulOptionToFind].pcharOption,
                            pMIMEHeaderValueRequire->value()))
	    {
		bRetainState = TRUE;
	    }

	    pMIMEHeaderValueRequire = pMIMEHeaderRequire->getNextHeaderValue();
	}

    }

    return bRetainState;
}