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hxstrm.cpp：源码内容
							/* ***** 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/stdio.h"
#include "hxtypes.h"
#include "hxresult.h"
#include "hxcom.h"
#ifdef _WINDOWS
#include <windows.h>
#endif
#include "ihxpckts.h"
#include "hxfiles.h"
#include "hxengin.h"
#include "hxcore.h"
#include "hxasm.h"
#include "hxgroup.h"
#include "hxplay.h"
#include "hxsmbw.h"
#include "hxprefs.h"
#include "hxslist.h"
#include "hxstring.h"
#include "chxpckts.h"
#include "hxbsrc.h"
#include "hxsrc.h"
#include "hxsmstr.h"
#include "hxstrm.h"
#include "hxstrutl.h"
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif
HXStream::HXStream() :
     m_lRefCount (0)
    ,m_pSource (NULL)
    ,m_pHeader (NULL)
    ,m_pUnkRenderer(NULL)
    ,m_uStreamNumber(0)
    ,m_ulRegistryID(0)
#if defined(HELIX_FEATURE_ASM)
    ,m_pASMStream(NULL)
#endif /* HELIX_FEATURE_ASM */
    ,m_bPostSeekToBeSent(FALSE)
{
}
HXStream::~HXStream()
{
    if (m_pSource)
    {
	m_pSource->Release();
    }
    if (m_pHeader)
    {
	m_pHeader->Release();
    }
    if (m_pUnkRenderer)
    {
	m_pUnkRenderer->Release();
    }
#if defined(HELIX_FEATURE_ASM)
    HX_RELEASE(m_pASMStream);
#endif /* HELIX_FEATURE_ASM */
}
/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::QueryInterface
//	Purpose:
//		Implement this to export the interfaces supported by your 
//		object.
//
STDMETHODIMP HXStream::QueryInterface(REFIID riid, void** ppvObj)
{
    QInterfaceList qiList[] =
        {
            { GET_IIDHANDLE(IID_IHXStream), (IHXStream*)this },
            { GET_IIDHANDLE(IID_IHXRegistryID), (IHXRegistryID*)this },
            { GET_IIDHANDLE(IID_IHXLayoutStream), (IHXLayoutStream*)this },
            { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXStream*)this },
        };
    
    HX_RESULT res = ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
    
    // if it succeeded, return immediately...
    if (SUCCEEDED(res))
    {
        return res;
    }
    // ...otherwise proceed
    
#if defined(HELIX_FEATURE_ASM)
    /* Let HXASMStream respond to ASM interface if it wants to. */
    if (m_pASMStream && (HXR_OK == m_pASMStream->QueryInterface(riid, ppvObj)))
    {
	return HXR_OK;
    }
#endif /* HELIX_FEATURE_ASM */
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}
/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::AddRef
//	Purpose:
//		Everyone usually implements this the same... feel free to use
//		this implementation.
//
STDMETHODIMP_(ULONG32) HXStream::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}
/////////////////////////////////////////////////////////////////////////
//	Method:
//		IUnknown::Release
//	Purpose:
//		Everyone usually implements this the same... feel free to use
//		this implementation.
//
STDMETHODIMP_(ULONG32) HXStream::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
	return m_lRefCount;
    }
    delete this;
    return 0;
}
/*
 * IHXStream methods
 */
/************************************************************************
 *	Method:
 *	    IHXStream::GetSource
 *	Purpose:
 *	    Get the interface to the source object of which the stream is
 *	    a part of.
 *
 */
STDMETHODIMP HXStream::GetSource(IHXStreamSource*	&pSource)
{
    pSource = m_pSource;
    if (pSource)
    {
	pSource->AddRef();
    }
    return HXR_OK;
}
/************************************************************************
 *	Method:
 *	    IHXStream::GetStreamNumber
 *	Purpose:
 *	    Get the stream number for this stream relative to the source 
 *	    object of which the stream is a part of.
 *
 */
STDMETHODIMP_(UINT16) HXStream::GetStreamNumber(void)
{
    HX_ASSERT(m_pHeader);
    return (UINT16)m_uStreamNumber;
}
/************************************************************************
 *	Method:
 *	    IHXStream::GetStreamType
 *	Purpose:
 *	    Get the MIME type for this stream. NOTE: The returned string is
 *	    assumed to be valid for the life of the IHXStream from which it
 *	    was returned.
 *
 */
STDMETHODIMP_(const char*) HXStream::GetStreamType(void)
{
    HX_ASSERT(m_pHeader);
    IHXBuffer*	pMimeTypeBuffer = 0;
    m_pHeader->GetPropertyCString("MimeType",pMimeTypeBuffer);
    HX_ASSERT(pMimeTypeBuffer);
    const char* pMimeTypeString = (const char* )pMimeTypeBuffer->GetBuffer();
    pMimeTypeBuffer->Release();
    return pMimeTypeString;
}
/************************************************************************
 *	Method:
 *	    IHXStream::GetHeader
 *	Purpose:
 *      Get the header for this stream.
 *
 */
STDMETHODIMP_(IHXValues*) HXStream::GetHeader(void)
{
    HX_ASSERT(m_pHeader);
    m_pHeader->AddRef();
    return m_pHeader;
}
/************************************************************************
 *	Method:
 *	    IHXStream::ReportQualityOfService
 *	Purpose:
 *	    Call this method to report to the playback context that the 
 *	    quality of service for this stream has changed. The unQuality
 *	    should be on a scale of 0 to 100, where 100 is the best possible
 *	    quality for this stream. Although the transport engine can 
 *	    determine lost packets and report these through the user
 *	    interface, only the renderer of this stream can determine the 
 *	    "real" perceived damage associated with this loss.
 *
 *	    NOTE: The playback context may use this value to indicate loss
 *	    in quality to the user interface. When the effects of a lost
 *	    packet are eliminated the renderer should call this method with
 *	    a unQuality of 100.
 *
 */
STDMETHODIMP HXStream::ReportQualityOfService(UINT8 unQuality)
{
    return HXR_NOTIMPL;
}
/************************************************************************
 *	Method:
 *	    IHXStream::ReportRebufferStatus
 *	Purpose:
 *	    Call this method to report to the playback context that the
 *	    available data has dropped to a critically low level, and that
 *	    rebuffering should occur. The renderer should call back into this
 *	    interface as it receives additional data packets to indicate the
 *	    status of its rebuffering effort.
 *
 *	    NOTE: The values of unNeeded and unAvailable are used to indicate
 *	    the general status of the rebuffering effort. For example, if a
 *	    renderer has "run dry" and needs 5 data packets to play smoothly
 *	    again, it should call ReportRebufferStatus() with 5,0 then as
 *	    packet arrive it should call again with 5,1; 5,2... and eventually
 *	    5,5.
 *
 */
STDMETHODIMP HXStream::ReportRebufferStatus(UINT8 unNeeded, UINT8 unAvailable)
{
    if (m_pSource && m_pHeader)
    {
	return m_pSource->ReportRebufferStatus(GetStreamNumber(), 
					unNeeded, unAvailable);
    }
    return HXR_OK;
}
STDMETHODIMP
HXStream::SetGranularity (ULONG32 ulGranularity) 
{
    if (m_pSource && m_pHeader)
    {
	return m_pSource->SetGranularity(GetStreamNumber(),ulGranularity);
    }
    return HXR_OK;
}
/************************************************************************
 *  Method:
 *    IHXStream::GetRendererCount
 *  Purpose:
 *    Returns the current number of renderer instances supported by
 *    this stream instance.
 */
STDMETHODIMP_(UINT16) HXStream::GetRendererCount()
{
    // In RMA 1.0 there is only one renderer per stream.
    return 1;
}
/************************************************************************
 *  Method:
 *    IHXStream::GetRenderer
 *  Purpose:
 *    Returns the Nth renderer instance supported by this stream.
 */
STDMETHODIMP HXStream::GetRenderer
(
    UINT16		nIndex,
    REF(IUnknown*)	pUnknown
)
{
    if (nIndex >= 1)
    {
	return HXR_INVALID_PARAMETER;
    }
    pUnknown = m_pUnkRenderer;
    if (pUnknown)
    {
	pUnknown->AddRef();
	return HXR_OK;
    }
    else
    {
	return HXR_FAIL;
    }
}
HX_RESULT    HXStream::Init(HXPlayer* pPlayer, HXSource* pSource, IHXValues* pHeader, 
			     IUnknown* pUnkRenderer)
{
    m_pSource	    = pSource;
    m_pHeader	    = pHeader;
    if (m_pSource)
    {
	m_pSource->AddRef();
    }
    if (m_pHeader)
    {
	m_pHeader->AddRef();
	ULONG32 uStreamNumber = 0;
	m_pHeader->GetPropertyULONG32("StreamNumber",uStreamNumber);
	m_uStreamNumber = (UINT16) uStreamNumber;
    }
#if defined(HELIX_FEATURE_STATS) && defined(HELIX_FEATURE_REGISTRY)
    UINT32 ulSourceID;
    char pStreamEntry[MAX_DISPLAY_NAME]; /* Flawfinder: ignore */
    IHXBuffer* pPropName;
    m_pSource->GetID(ulSourceID);
    m_pSource->m_pRegistry->GetPropName(ulSourceID, pPropName);
    SafeSprintf(pStreamEntry, MAX_DISPLAY_NAME, "%s.Stream%d", pPropName->GetBuffer(), m_uStreamNumber);
    m_ulRegistryID = m_pSource->m_pRegistry->GetId(pStreamEntry);
    HX_ASSERT(m_ulRegistryID);
    pPropName->Release();
#endif /* HELIX_FEATURE_STATS && HELIX_FEATURE_REGISTRY */
    if (pUnkRenderer)
    {
	m_pUnkRenderer = pUnkRenderer;
	m_pUnkRenderer->AddRef();
    }
#if defined(HELIX_FEATURE_ASM)
    m_pASMStream = new HXASMStream(this, m_pSource);
    if(m_pASMStream)
    {
        m_pASMStream->AddRef();
    }
    else
    {
        return HXR_OUTOFMEMORY;
    }
#endif /* HELIX_FEATURE_ASM */
    return HXR_OK;
}
HX_RESULT	
HXStream::SetRenderer(IUnknown* pUnkRenderer)
{
    if (pUnkRenderer && m_pUnkRenderer != pUnkRenderer)
    {
	HX_RELEASE(m_pUnkRenderer);
	m_pUnkRenderer = pUnkRenderer;
	m_pUnkRenderer->AddRef();
    }
    return HXR_OK;
}
/************************************************************************
 *	Method:
 *	    IHXRegistryID::GetID
 *	Purpose:
 *	    Get registry ID(hash_key) of the objects(player, source and stream)
 *
 */
STDMETHODIMP
HXStream::GetID(REF(UINT32) /*OUT*/ ulRegistryID)
{
    ulRegistryID = m_ulRegistryID;
   
    return HXR_OK;
}
STDMETHODIMP
HXStream::GetProperties(REF(IHXValues*) pProps)
{
    HX_RESULT	    rc = HXR_OK;
    STREAM_INFO*    pStreamInfo = NULL;    
    if (!m_pSource || HXR_OK != m_pSource->GetStreamInfo(m_uStreamNumber, pStreamInfo))
    {
	rc = HXR_FAILED;
	goto cleanup;
    }
    pProps = pStreamInfo->m_pStreamProps;
    HX_ADDREF(pProps);
cleanup:
    return rc;
}
STDMETHODIMP
HXStream::SetProperties(IHXValues* pProps)
{
    HX_RESULT	    rc = HXR_OK;
    UINT32	    ulDelay = 0;
    UINT32	    ulDuration = 0;
    STREAM_INFO*    pStreamInfo = NULL;
    if (!m_pSource || HXR_OK != m_pSource->GetStreamInfo(m_uStreamNumber, pStreamInfo))
    {
	rc = HXR_FAILED;
	goto cleanup;
    }
    if (HXR_OK == pProps->GetPropertyULONG32("delay", ulDelay))
    {
	m_pSource->UpdateDelay(ulDelay);
    }
    if (HXR_OK == pProps->GetPropertyULONG32("duration", ulDuration))
    {
	m_pSource->UpdateDuration(ulDuration);
    }
    HX_RELEASE(pStreamInfo->m_pStreamProps);
    pStreamInfo->m_pStreamProps = pProps;
    HX_ADDREF(pStreamInfo->m_pStreamProps);
cleanup:
    return rc;
}
HX_RESULT
HXStream::ResetASMSource(IHXASMSource* pASMSource)
{
    HX_RESULT	hr = HXR_OK;
#if defined(HELIX_FEATURE_ASM)
    if (!m_pASMStream)
    {
	hr = HXR_FAILED;
	goto cleanup;
    }
    hr = m_pASMStream->ResetASMSource(pASMSource);
cleanup:
#endif /* HELIX_FEATURE_ASM */
    return hr;
}
BOOL	
HXStream::IsTimeStampDelivery()
{
    BOOL bTimeStampDelivered = FALSE;
#if defined(HELIX_FEATURE_ASM)
    if (m_pASMStream)
    {
	bTimeStampDelivered = m_pASMStream->IsTimeStampDelivery();
    }
#endif /* HELIX_FEATURE_ASM */
    return bTimeStampDelivered;
}
void	
HXStream::PostEndTimePacket(IHXPacket* pPacket, BOOL& bSentMe, BOOL& bEndMe)
{
    bSentMe = TRUE;
    bEndMe = TRUE;
#if defined(HELIX_FEATURE_ASM)
    if (!pPacket || !m_pASMStream)
    {
	goto cleanup;
    }
    m_pASMStream->PostEndTimePacket(pPacket, bSentMe, bEndMe);
cleanup:
#endif /* HELIX_FEATURE_ASM */
    return;
}
    
void
HXStream::ResetASMRuleState(void)
{
#if defined(HELIX_FEATURE_ASM)
    if (m_pASMStream)
    {
	m_pASMStream->ResetASMRuleState();
    }
#endif /* HELIX_FEATURE_ASM */
    return;
}
HXSource*
HXStream::GetHXSource(void)
{
    if (m_pSource)
    {
	m_pSource->AddRef(); 
    }
    return m_pSource;
}
BOOL
HXStream::IsSureStream(void)
{
    UINT32 ulThresholds = 0;
#if defined(HELIX_FEATURE_ASM)
    if (m_pASMStream)
    {
	ulThresholds = m_pASMStream->GetNumThresholds();
	if (ulThresholds > 1)
	{
	    return TRUE;
	}
    }
#endif /* HELIX_FEATURE_ASM */
    return FALSE;
}

						