//------------------------------------------------------------------------------
// File: DllSetup.cpp
//
// Desc: DirectShow base classes.
//
// Copyright (c) 1992-2002 Microsoft Corporation.  All rights reserved.
//------------------------------------------------------------------------------


#include <streams.h>

//---------------------------------------------------------------------------
// defines

#define MAX_KEY_LEN  260


//---------------------------------------------------------------------------
// externally defined functions/variable

extern int g_cTemplates;
extern CFactoryTemplate g_Templates[];

//---------------------------------------------------------------------------
//
// EliminateSubKey
//
// Try to enumerate all keys under this one.
// if we find anything, delete it completely.
// Otherwise just delete it.
//
// note - this was pinched/duplicated from
// Filgraph\Mapper.cpp - so should it be in
// a lib somewhere?
//
//---------------------------------------------------------------------------

STDAPI
EliminateSubKey( HKEY hkey, LPTSTR strSubKey )
{
  HKEY hk;
  if (0 == lstrlen(strSubKey) ) {
      // defensive approach
      return E_FAIL;
  }

  LONG lreturn = RegOpenKeyEx( hkey
                             , strSubKey
                             , 0
                             , MAXIMUM_ALLOWED
                             , &hk );

  ASSERT(    lreturn == ERROR_SUCCESS
          || lreturn == ERROR_FILE_NOT_FOUND
          || lreturn == ERROR_INVALID_HANDLE );

  if( ERROR_SUCCESS == lreturn )
  {
    // Keep on enumerating the first (zero-th)
    // key and deleting that

    for( ; ; )
    {
      TCHAR Buffer[MAX_KEY_LEN];
      DWORD dw = MAX_KEY_LEN;
      FILETIME ft;

      lreturn = RegEnumKeyEx( hk
                            , 0
                            , Buffer
                            , &dw
                            , NULL
                            , NULL
                            , NULL
                            , &ft);

      ASSERT(    lreturn == ERROR_SUCCESS
              || lreturn == ERROR_NO_MORE_ITEMS );

      if( ERROR_SUCCESS == lreturn )
      {
        EliminateSubKey(hk, Buffer);
      }
      else
      {
        break;
      }
    }

    RegCloseKey(hk);
    RegDeleteKey(hkey, strSubKey);
  }

  return NOERROR;
}


//---------------------------------------------------------------------------
//
// AMovieSetupRegisterServer()
//
// registers specfied file "szFileName" as server for
// CLSID "clsServer".  A description is also required.
// The ThreadingModel and ServerType are optional, as
// they default to InprocServer32 (i.e. dll) and Both.
//
//---------------------------------------------------------------------------

STDAPI
AMovieSetupRegisterServer( CLSID   clsServer
                         , LPCWSTR szDescription
                         , LPCWSTR szFileName
                         , LPCWSTR szThreadingModel = L"Both"
                         , LPCWSTR szServerType     = L"InprocServer32" )
{
  // temp buffer
  //
  TCHAR achTemp[MAX_PATH];

  // convert CLSID uuid to string and write
  // out subkey as string - CLSID\{}
  //
  OLECHAR szCLSID[CHARS_IN_GUID];
  HRESULT hr = StringFromGUID2( clsServer
                              , szCLSID
                              , CHARS_IN_GUID );
  ASSERT( SUCCEEDED(hr) );

  // create key
  //
  HKEY hkey;
  wsprintf( achTemp, TEXT("CLSID\\%ls"), szCLSID );
  LONG lreturn = RegCreateKey( HKEY_CLASSES_ROOT
                             , (LPCTSTR)achTemp
                             , &hkey              );
  if( ERROR_SUCCESS != lreturn )
  {
    return AmHresultFromWin32(lreturn);
  }

  // set description string
  //

  wsprintf( achTemp, TEXT("%ls"), szDescription );
  lreturn = RegSetValue( hkey
                       , (LPCTSTR)NULL
                       , REG_SZ
                       , achTemp
                       , sizeof(achTemp) );
  if( ERROR_SUCCESS != lreturn )
  {
    RegCloseKey( hkey );
    return AmHresultFromWin32(lreturn);
  }

  // create CLSID\\{"CLSID"}\\"ServerType" key,
  // using key to CLSID\\{"CLSID"} passed back by
  // last call to RegCreateKey().
  //
  HKEY hsubkey;

  wsprintf( achTemp, TEXT("%ls"), szServerType );
  lreturn = RegCreateKey( hkey
                        , achTemp
                        , &hsubkey     );
  if( ERROR_SUCCESS != lreturn )
  {
    RegCloseKey( hkey );
    return AmHresultFromWin32(lreturn);
  }

  // set Server string
  //
  wsprintf( achTemp, TEXT("%ls"), szFileName );
  lreturn = RegSetValue( hsubkey
                       , (LPCTSTR)NULL
                       , REG_SZ
                       , (LPCTSTR)achTemp
                       , sizeof(TCHAR) * (lstrlen(achTemp)+1) );
  if( ERROR_SUCCESS != lreturn )
  {
    RegCloseKey( hkey );
    RegCloseKey( hsubkey );
    return AmHresultFromWin32(lreturn);
  }

  wsprintf( achTemp, TEXT("%ls"), szThreadingModel );
  lreturn = RegSetValueEx( hsubkey
                         , TEXT("ThreadingModel")
                         , 0L
                         , REG_SZ
                         , (CONST BYTE *)achTemp
                         , sizeof(TCHAR) * (lstrlen(achTemp)+1) );

  // close hkeys
  //
  RegCloseKey( hkey );
  RegCloseKey( hsubkey );

  // and return
  //
  return HRESULT_FROM_WIN32(lreturn);

}


//---------------------------------------------------------------------------
//
// AMovieSetupUnregisterServer()
//
// default ActiveMovie dll setup function
// - to use must be called from an exported
//   function named DllRegisterServer()
//
//---------------------------------------------------------------------------

STDAPI
AMovieSetupUnregisterServer( CLSID clsServer )
{
  // convert CLSID uuid to string and write
  // out subkey CLSID\{}
  //
  OLECHAR szCLSID[CHARS_IN_GUID];
  HRESULT hr = StringFromGUID2( clsServer
                              , szCLSID
                              , CHARS_IN_GUID );
  ASSERT( SUCCEEDED(hr) );

  TCHAR achBuffer[MAX_KEY_LEN];
  wsprintf( achBuffer, TEXT("CLSID\\%ls"), szCLSID );

  // delete subkey
  //

  hr = EliminateSubKey( HKEY_CLASSES_ROOT, achBuffer );
  ASSERT( SUCCEEDED(hr) );

  // return
  //
  return NOERROR;
}


//---------------------------------------------------------------------------
//
// AMovieSetupRegisterFilter through IFilterMapper2
//
//---------------------------------------------------------------------------

STDAPI
AMovieSetupRegisterFilter2( const AMOVIESETUP_FILTER * const psetupdata
                          , IFilterMapper2 *                 pIFM2
                          , BOOL                             bRegister  )
{
  DbgLog((LOG_TRACE, 3, TEXT("= AMovieSetupRegisterFilter")));

  // check we've got data
  //
  if( NULL == psetupdata ) return S_FALSE;


  // unregister filter
  // (as pins are subkeys of filter's CLSID key
  // they do not need to be removed separately).
  //
  DbgLog((LOG_TRACE, 3, TEXT("= = unregister filter")));
  HRESULT hr = pIFM2->UnregisterFilter(
      0,                        // default category
      0,                        // default instance name
      *psetupdata->clsID );


  if( bRegister )
  {
    REGFILTER2 rf2;
    rf2.dwVersion = 1;
    rf2.dwMerit = psetupdata->dwMerit;
    rf2.cPins = psetupdata->nPins;
    rf2.rgPins = psetupdata->lpPin;
    
    // register filter
    //
    DbgLog((LOG_TRACE, 3, TEXT("= = register filter")));
    hr = pIFM2->RegisterFilter(*psetupdata->clsID
                             , psetupdata->strName
                             , 0 // moniker
                             , 0 // category
                             , NULL // instance
                             , &rf2);
  }

  // handle one acceptable "error" - that
  // of filter not being registered!
  // (couldn't find a suitable #define'd
  // name for the error!)
  //
  if( 0x80070002 == hr)
    return NOERROR;
  else
    return hr;
}


//---------------------------------------------------------------------------
//
// RegisterAllServers()
//
//---------------------------------------------------------------------------

STDAPI
RegisterAllServers( LPCWSTR szFileName, BOOL bRegister )
{
  HRESULT hr = NOERROR;

  for( int i = 0; i < g_cTemplates; i++ )
  {
    // get i'th template
    //
    const CFactoryTemplate *pT = &g_Templates[i];

    DbgLog((LOG_TRACE, 2, TEXT("- - register %ls"),
           (LPCWSTR)pT->m_Name ));

    // register CLSID and InprocServer32
    //
    if( bRegister )
    {
      hr = AMovieSetupRegisterServer( *(pT->m_ClsID)
                                    , (LPCWSTR)pT->m_Name
                                    , szFileName );
    }
    else
    {
      hr = AMovieSetupUnregisterServer( *(pT->m_ClsID) );
    }

    // check final error for this pass
    // and break loop if we failed
    //
    if( FAILED(hr) )
      break;
  }

  return hr;
}