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135 lines
3.1 KiB
135 lines
3.1 KiB
//
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// Microsoft Windows Media Technologies
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// © 1999 Microsoft Corporation. All rights reserved.
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//
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// Refer to your End User License Agreement for details on your rights/restrictions to use these sample files.
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//
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// MSHDSP.DLL is a sample WMDM Service Provider(SP) that enumerates fixed drives.
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// This sample shows you how to implement an SP according to the WMDM documentation.
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// This sample uses fixed drives on your PC to emulate portable media, and
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// shows the relationship between different interfaces and objects. Each hard disk
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// volume is enumerated as a device and directories and files are enumerated as
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// Storage objects under respective devices. You can copy non-SDMI compliant content
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// to any device that this SP enumerates. To copy an SDMI compliant content to a
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// device, the device must be able to report a hardware embedded serial number.
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// Hard disks do not have such serial numbers.
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//
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// To build this SP, you are recommended to use the MSHDSP.DSP file under Microsoft
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// Visual C++ 6.0 and run REGSVR32.EXE to register the resulting MSHDSP.DLL. You can
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// then build the sample application from the WMDMAPP directory to see how it gets
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// loaded by the application. However, you need to obtain a certificate from
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// Microsoft to actually run this SP. This certificate would be in the KEY.C file
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// under the INCLUDE directory for one level up.
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#include "hdspPCH.h"
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#include "wmdmlog_i.c"
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BOOL fIsLoggingEnabled( VOID )
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{
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static BOOL fEnabled = FALSE;
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HRESULT hr;
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IWMDMLogger *pLogger = NULL;
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static BOOL fChecked = FALSE;
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if( !fChecked )
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{
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fChecked = TRUE;
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hr = CoCreateInstance(
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CLSID_WMDMLogger,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_IWMDMLogger,
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(void**)&pLogger
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);
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CORg( hr );
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hr = pLogger->IsEnabled( &fEnabled );
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CORg( hr );
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}
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Error:
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if( NULL != pLogger )
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{
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pLogger->Release();
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pLogger = NULL;
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}
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return fEnabled;
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}
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HRESULT hrLogString(LPSTR pszMessage, HRESULT hrSev)
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{
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HRESULT hr=S_OK;
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IWMDMLogger *pLogger = NULL;
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if( !fIsLoggingEnabled() )
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{
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return S_FALSE;
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}
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hr = CoCreateInstance(
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CLSID_WMDMLogger,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_IWMDMLogger,
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(void**)&pLogger
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);
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CORg( hr );
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hr = pLogger->LogString(
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( FAILED(hrSev) ? WMDM_LOG_SEV_ERROR : WMDM_LOG_SEV_INFO ),
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"LyraSP",
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pszMessage
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);
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CORg( hr );
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Error:
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if( pLogger )
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{
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pLogger->Release();
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}
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return hr;
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}
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HRESULT hrLogDWORD(LPSTR pszFormat, DWORD dwValue, HRESULT hrSev)
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{
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HRESULT hr=S_OK;
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IWMDMLogger *pLogger = NULL;
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if( !fIsLoggingEnabled() )
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{
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return S_FALSE;
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}
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hr = CoCreateInstance(
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CLSID_WMDMLogger,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_IWMDMLogger,
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(void**)&pLogger
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);
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CORg( hr );
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hr = pLogger->LogDword(
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( FAILED(hrSev) ? WMDM_LOG_SEV_ERROR : WMDM_LOG_SEV_INFO ),
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"LyraSP",
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pszFormat,
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dwValue
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);
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CORg( hr );
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Error:
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if( pLogger )
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{
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pLogger->Release();
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}
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return hr;
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}
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