hxplugin.cpp

linux下的一款播放器

	if( SUCCEEDED( pUnkPlugin->QueryInterface( IID_IHXComponentPlugin, (void**) &pComponentPlugin ) ) )
	{
	    // Ask for the correct object by CLSID
	    IHXBuffer* pCLSID = NULL;
	    if( SUCCEEDED( m_pValues->GetPropertyBuffer( PLUGIN_COMPONENT_CLSID, pCLSID ) ) )
	    {
		hr = pComponentPlugin->CreateComponentInstance( *(GUID*) pCLSID->GetBuffer(), pUnknown, pIUnkOuter );
		HX_RELEASE( pCLSID );
	    }
	    else
	    {
		// component plugins must have CLSID
                HX_ASSERT(false);
	    }

	    HX_RELEASE( pComponentPlugin );
	    HX_RELEASE( pUnkPlugin );
	}
	else
	{
	    if( !pIUnkOuter )
	    {
		pUnknown = pUnkPlugin;
                pUnknown->AddRef();
                hr = HXR_OK;
	    }
            else
            {
                // we can't aggregate anything because this is not a component plugin
                HX_ASSERT(false);
            }

            HX_RELEASE( pUnkPlugin );
	}
    }

    return hr;
}




HX_RESULT HXPlugin::GetPluginInfo(IHXValues*& pVals)
{
    if (m_pValues)
    {
	pVals = m_pValues;
        pVals->AddRef();
	return HXR_OK;
    }
    pVals = NULL;
    return HXR_FAIL;
}


HX_RESULT
HXPlugin::GetBasicValues(IHXPlugin* pHXPlugin)
{
    DPRINTF(D_INFO, ("HXPlugin()::GetBasicValues(): returning nothing\n"));
    return HXR_OK;

#if(0)
    const char*	pszDescription = NULL;
    const char* pszCopyright = NULL;
    const char* pszMoreInfoUrl = NULL;
    ULONG32	ulVersionNumber = 0;
    BOOL	nload_multiple = 0;

    if (HXR_OK != pHXPlugin->GetPluginInfo(nload_multiple, pszDescription,
				       pszCopyright, pszMoreInfoUrl, ulVersionNumber))
    {
        return HXR_FAIL;
    }

    IHXBuffer* pBuffer = NULL;
    m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
    if (pszDescription)
    {
	pBuffer->Set((UCHAR*)pszDescription, strlen(pszDescription)+1);
    }
    m_pValues->SetPropertyCString(PLUGIN_DESCRIPTION2, pBuffer);
    pBuffer->Release();
    m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
    if (pszCopyright)
    {
	pBuffer->Set((UCHAR*)pszCopyright, strlen(pszCopyright)+1);
    }
    m_pValues->SetPropertyCString(PLUGIN_COPYRIGHT2, pBuffer);
    pBuffer->Release();
    m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
    if (pszMoreInfoUrl)
    {
	pBuffer->Set((UCHAR*)pszMoreInfoUrl, strlen(pszMoreInfoUrl)+1);
    }
    m_pValues->SetPropertyCString(PLUGIN_COPYRIGHT, pBuffer);
    pBuffer->Release();

    m_pValues->SetPropertyULONG32(PLUGIN_LOADMULTIPLE, nload_multiple);
    m_pValues->SetPropertyULONG32(PLUGIN_VERSION, ulVersionNumber);
    return HXR_OK;
#endif
}


HX_RESULT
HXPlugin::GetExtendedValues(IHXPlugin* pHXPlugin)
{

    IHXFileFormatObject*		pFileFormat	    = NULL;
    IHXFileWriter*			pFileWriter	    = NULL;
    IHXFileSystemObject*		pFileSystem	    = NULL;
    IHXRenderer*			pRenderer	    = NULL;
    IHXDataRevert*			pDataRevert	    = NULL;
    IHXStreamDescription*		pStreamDescription  = NULL;
    IHXCommonClassFactory*		pClassFactory       = NULL;
    IHXPluginProperties*		pIHXPluginPropertiesThis = NULL;
    UINT32				nCountInterfaces    = 0;


    DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues():\n"));

    // file system
    if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXFileSystemObject, (void**) &pFileSystem))
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): file system object...\n"));
	const char* pszShortName;
	const char* pszProtocol;

	if (HXR_OK != pFileSystem->GetFileSystemInfo(pszShortName, pszProtocol))
	{
	    HX_RELEASE (pFileSystem);
	    return  HXR_FAIL;
	}

	SetPluginProperty(PLUGIN_FILESYSTEM_TYPE);

	IHXBuffer* pBuffer = NULL;
	m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
	if (pszShortName)
	{
	    pBuffer->Set((UCHAR*)pszShortName, strlen(pszShortName)+1);
	}
	m_pValues->SetPropertyCString(PLUGIN_FILESYSTEMSHORT, pBuffer);
	pBuffer->Release();
	m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
	if (pszProtocol)
	{
	    pBuffer->Set((UCHAR*)pszProtocol, strlen(pszProtocol)+1);
	}
	m_pValues->SetPropertyCString(PLUGIN_FILESYSTEMPROTOCOL, pBuffer);
	pBuffer->Release();

	pFileSystem->Release();
	nCountInterfaces++;

        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): fs proto = '%s'\n", pszProtocol));
    }

    // file format
    if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXFileFormatObject, (void**)&pFileFormat) ||
	HXR_OK == pHXPlugin->QueryInterface(IID_IHXMetaFileFormatObject, (void**)&pFileFormat) ||
	HXR_OK == pHXPlugin->QueryInterface(IID_IHXFileWriter, (void**)&pFileWriter))
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): file format...\n"));
	// fine we are in now we will get the correct type.
	if (pFileFormat)
	{
	    pFileFormat->Release();
	}
	else
	{
	    pFileWriter->Release();
	}

	IHXMetaFileFormatObject* pMetaFileFormat;

	const char**		ppszMimeTypes = NULL;
	const char**		ppszExtensions = NULL;
	const char**		ppszOpenNames = NULL;

	if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXFileFormatObject, (void**)&pFileFormat))
	{
	    pFileFormat->GetFileFormatInfo( ppszMimeTypes,
					    ppszExtensions,
					    ppszOpenNames);
	    pFileFormat->Release();
	    SetPluginProperty(PLUGIN_FILEFORMAT_TYPE);
	}

	if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXMetaFileFormatObject, (void**)&pMetaFileFormat))
	{
	    pMetaFileFormat->GetMetaFileFormatInfo( ppszMimeTypes,
						    ppszExtensions,
						    ppszOpenNames);
	    pMetaFileFormat->Release();

	    SetPluginProperty(PLUGIN_METAFILEFORMAT_TYPE);
	}

	if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXFileWriter, (void**)&pFileWriter))
	{
	    pFileWriter->GetFileFormatInfo( ppszMimeTypes,
					    ppszExtensions,
					    ppszOpenNames);
	    pFileWriter->Release();

	    SetPluginProperty(PLUGIN_FILEWRITER_TYPE);
	}

	IHXBuffer* pBuffer = NULL;
	if (ppszMimeTypes)
	{
	    CatStrings((char**)ppszMimeTypes, pBuffer);	    //XXXAH this had better be const in reality!
	    m_pValues->SetPropertyCString(PLUGIN_FILEMIMETYPES, pBuffer);
	    pBuffer->Release();
	}

	if (ppszExtensions)
	{
	    CatStrings((char**)ppszExtensions, pBuffer);		//XXXAH this had better be const in reality!
	    m_pValues->SetPropertyCString(PLUGIN_FILEEXTENSIONS, pBuffer);
	    pBuffer->Release();
	}

	if (ppszOpenNames)
	{
	    CatStrings((char**)ppszOpenNames, pBuffer);		//XXXAH this had better be const in reality!
	    m_pValues->SetPropertyCString(PLUGIN_FILEOPENNAMES, pBuffer);
	    pBuffer->Release();
	}
	nCountInterfaces++;
    }

    // renderer
    if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXRenderer, (void**)&pRenderer))
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): renderer...\n"));
	char**	ppszMimeTypes;
        UINT32	initial_granularity = 0;

	// get the basic info
	if (HXR_OK == pRenderer->GetRendererInfo((const char**&)ppszMimeTypes, initial_granularity))
	{
	    IHXBuffer* pBuffer;
	    if (ppszMimeTypes)
	    {
		CatStrings(ppszMimeTypes, pBuffer);
	    }
	    m_pValues->SetPropertyCString(PLUGIN_RENDERER_MIME, pBuffer);
	    pBuffer->Release();
	    m_pValues->SetPropertyULONG32(PLUGIN_RENDERER_GRANULARITY, initial_granularity);
	    SetPluginProperty(PLUGIN_RENDERER_TYPE);
	}

	HX_RELEASE(pRenderer);
	nCountInterfaces++;
    }

    // stream description
    if (HXR_OK == pHXPlugin->QueryInterface(IID_IHXStreamDescription, (void**)&pStreamDescription))
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): stream description...\n"));
	const char* pszMimeType;
	IHXBuffer* pBuffer;
	if (HXR_OK != pStreamDescription->GetStreamDescriptionInfo(pszMimeType))
	{
	    HX_RELEASE (pStreamDescription);
	    return HXR_FAIL;
	}
	pStreamDescription->Release();
	m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pBuffer);
	if (pszMimeType)
	{
	    pBuffer->Set((UCHAR*)pszMimeType, strlen(pszMimeType)+1);
	}
	m_pValues->SetPropertyCString(PLUGIN_STREAMDESCRIPTION, pBuffer);
	pBuffer->Release();

	SetPluginProperty(PLUGIN_STREAM_DESC_TYPE);
	nCountInterfaces++;
    }

    // common class factory
    if(HXR_OK == pHXPlugin->QueryInterface(IID_IHXCommonClassFactory,
					(void**)&pClassFactory))
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): class factory plugin...\n"));
	SetPluginProperty(PLUGIN_CLASS_FACTORY_TYPE);
	HX_RELEASE (pClassFactory);
	nCountInterfaces++;
    }


    if( SUCCEEDED( pHXPlugin->QueryInterface( IID_IHXPluginProperties, (void**)&pIHXPluginPropertiesThis ) ) )
    {
        DPRINTF(D_INFO, ("HXPlugin()::GetExtendedValues(): plugin properties interface...\n"));
	IHXValues* pIHXValuesProperties = NULL;

	pHXPlugin->InitPlugin(m_pContext);

	if( SUCCEEDED( pIHXPluginPropertiesThis->GetProperties( pIHXValuesProperties ) ) && pIHXValuesProperties )
	{
	    CHXHeader::mergeHeaders( m_pValues, pIHXValuesProperties );
	}

	HX_RELEASE(pIHXValuesProperties);

    }

    HX_RELEASE(pIHXPluginPropertiesThis);

    HX_ASSERT(nCountInterfaces<2);
    return HXR_OK;
}

HX_RESULT HXPlugin::AddComponentInfo( IHXValues* pVal )
{
    CHXHeader::mergeHeaders(m_pValues, pVal);
    return HXR_OK; // no way to know if above succeeded or not
}

HX_RESULT HXPlugin::CatStrings(char** pInStrings,
				    IHXBuffer*& pOutBuffer)
{
    ULONG32 nAllocedSpace   = 100;
    char*   ptemp	    = new char[nAllocedSpace];
    char*   ptemp2	    = NULL;
    ULONG32 nStrLen	    = 0;
    ULONG32 nNewStrLen	    = 0;

    *ptemp	= 0;
    pOutBuffer	= 0;

    for(; *pInStrings; pInStrings++)
    {
	nNewStrLen = strlen(*pInStrings);
	if (nNewStrLen+ nStrLen >= nAllocedSpace)
	{
	    // double if the new string is less than the new space
	    // or add double what it required.
	    if (nNewStrLen< nAllocedSpace)
	    {
		nAllocedSpace*=2;
	    }
	    else
	    {
		nAllocedSpace+=nNewStrLen*2;
	    }

	    ptemp2 = new char[nAllocedSpace];
	    memcpy(ptemp2, ptemp, nStrLen+1); /* Flawfinder: ignore */
	    delete [] ptemp;
	    ptemp = ptemp2;
	}
	// XXXAH I must trim the strings before I add them to this string.
	// the find function DEPENDS UPON THIS.
	SafeStrCat(ptemp,  *pInStrings, nAllocedSpace);
	if (*(pInStrings+1))
	{
	    SafeStrCat(ptemp,  k_pszValueSeperator, nAllocedSpace);	// XXXAH Perhaps a define?
	}
	nStrLen+=nNewStrLen+1;
    }
    m_pClassFactory->CreateInstance(CLSID_IHXBuffer,(void**)&pOutBuffer);
    pOutBuffer->Set((UCHAR*)ptemp, strlen(ptemp)+1);
    delete[] ptemp;
    return HXR_OK;
}