mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
131 lines
2.6 KiB
131 lines
2.6 KiB
/*++
|
|
|
|
Copyright (c) 2000 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
ThreeDJungleTrain.cpp
|
|
|
|
Abstract:
|
|
|
|
ThreedJungleTrain created a new DirectSound object every time
|
|
it entered the "3D Train Ride" part of the game, and destroyed
|
|
the object every time it went to a "2D interior" part. It was
|
|
keeping and using an old pointer to the first DirectSound object
|
|
it ever created even after it was destroyed. It was only luck that
|
|
Win9x would continue to allocate new objects in the same place that
|
|
allowed the game to work. This shim never allows the release of
|
|
that first object and then continues to hand back pointers to the
|
|
first object when new objects are requested so that the old pointer
|
|
the app uses always points to a (the) valid DirectSound object.
|
|
|
|
History:
|
|
|
|
08/09/2000 t-adams Created
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(ThreeDJungleTrain)
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(DirectSoundCreate)
|
|
APIHOOK_ENUM_END
|
|
|
|
|
|
// Pointer to the first DirectSound object created.
|
|
LPDIRECTSOUND g_pDS = NULL;
|
|
|
|
/*++
|
|
|
|
Hook DirectSoundCreate to remeber the first DS object created and afterwards
|
|
return a pointer to that object when new DS objects are requested.
|
|
|
|
--*/
|
|
HRESULT
|
|
APIHOOK(DirectSoundCreate)(
|
|
LPCGUID lpcGuid,
|
|
LPDIRECTSOUND *ppDS,
|
|
LPUNKNOWN pUnkOuter)
|
|
{
|
|
HRESULT hRet = DS_OK;
|
|
|
|
// Check to see if we have an old DS yet.
|
|
if( NULL == g_pDS ) {
|
|
// If not, then get a new DS
|
|
hRet = ORIGINAL_API(DirectSoundCreate)(lpcGuid, ppDS, pUnkOuter);
|
|
|
|
if ( DS_OK == hRet )
|
|
{
|
|
HookObject(
|
|
NULL,
|
|
IID_IDirectSound,
|
|
(PVOID*)ppDS,
|
|
NULL,
|
|
FALSE);
|
|
g_pDS = *ppDS;
|
|
}
|
|
|
|
goto exit;
|
|
|
|
} else {
|
|
// If so, then give back the old DS
|
|
*ppDS = g_pDS;
|
|
goto exit;
|
|
}
|
|
|
|
exit:
|
|
return hRet;
|
|
}
|
|
|
|
/*++
|
|
|
|
Hook IDirectSound_Release so DirectSound object isn't released.
|
|
|
|
--*/
|
|
HRESULT
|
|
COMHOOK(IDirectSound, Release)(
|
|
PVOID pThis)
|
|
{
|
|
// Don't release.
|
|
return 0;
|
|
}
|
|
|
|
/*++
|
|
|
|
Release global DirectSound object.
|
|
|
|
--*/
|
|
BOOL
|
|
NOTIFY_FUNCTION(
|
|
DWORD fdwReason)
|
|
{
|
|
if (fdwReason == DLL_PROCESS_DETACH) {
|
|
if (NULL != g_pDS) {
|
|
ORIGINAL_COM(IDirectSound, Release, g_pDS)(g_pDS);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*++
|
|
|
|
Register hooked functions
|
|
|
|
--*/
|
|
|
|
HOOK_BEGIN
|
|
|
|
APIHOOK_ENTRY(DSOUND.DLL, DirectSoundCreate)
|
|
|
|
COMHOOK_ENTRY(DirectSound, IDirectSound, Release, 2)
|
|
|
|
CALL_NOTIFY_FUNCTION
|
|
|
|
HOOK_END
|
|
|
|
IMPLEMENT_SHIM_END
|
|
|