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windows-server-2003/multimedia/directx/dinput/dx8/dll/dieffj.c

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/*****************************************************************************
*
* DIEffJ.c
*
* Copyright (c) 1996 Microsoft Corporation. All Rights Reserved.
*
* Abstract:
*
* Dummy effect driver for joystick.
*
* Contents:
*
* CJoyEff_CreateInstance
*
*****************************************************************************/
#include "dinputpr.h"
#ifdef DEMONSTRATION_FFDRIVER
/*****************************************************************************
*
* The sqiffle for this file.
*
*****************************************************************************/
#define sqfl sqflJoyEff
/****************************************************************************
*
* @doc DDK
*
* @topic DirectInput force feedback effect drivers |
*
* DirectInput instantiates the force feedback effect driver
* by creating the object named by the CLSID stored in the
* OEMForceFeedback registry subkey of the joystick type
* key.
*
* Note, however, that since applications using DirectInput
* need not load OLE, the effect driver should be careful
* not to rely on OLE-specific behavior.
* For example, applications using DirectInput cannot be
* relied upon to call <f CoFreeUnusedLibraries>.
* DirectInput will perform the standard COM operations to
* instantiate the effect driver object. The only visible
* effect this should have on the implementation of the
* effect driver is as follows:
*
* When DirectInput has released the last effect driver
* object, it will manually perform a <f FreeLibrary> of
* the effect driver DLL. Consequently, if the effect
* driver DLL creates additional resources that are not
* associated with the effect driver object, it should
* manually <f LoadLibrary> itself to artificially
* increase its DLL reference count, thereby preventing
* the <f FreeLibrary> from DirectInput from unloading
* the DLL prematurely.
*
* In particular, if the effect driver DLL creates a worker
* thread, the effect driver must perform this artificial
* <f LoadLibrary> for as long as the worker thread exists.
* When the worker thread is no longer needed (for example, upon
* notification from the last effect driver object as it
* is being destroyed), the worker thread should call
* <f FreeLibraryAndExitThread> to decrement the DLL reference
* count and terminate the thread.
*
* All magnitude and gain values used by DirectInput
* are uniform and linear across the range. Any
* nonlinearity in the physical device must be
* handled by the device driver so that the application
* sees a linear device.
*
*****************************************************************************/
/*****************************************************************************
*
* Declare the interfaces we will be providing.
*
* WARNING! If you add a secondary interface, you must also change
* CJoyEff_New!
*
*****************************************************************************/
Primary_Interface(CJoyEff, IDirectInputEffectDriver);
/*****************************************************************************
*
* @doc INTERNAL
*
* @struct JEFFECT |
*
* Dummy structure that records information about an effect.
*
* @field DWORD | tmDuration |
*
* Putative duration for effect.
*
* @field DWORD | tmStart |
*
* Time the effect started, or zero if not playing.
*
* @field BOOL | fInUse |
*
* Nonzero if this effect is allocated.
*
*****************************************************************************/
typedef struct JEFFECT {
DWORD tmDuration;
DWORD tmStart;
BOOL fInUse;
} JEFFECT, *PJEFFECT;
/*****************************************************************************
*
* @doc INTERNAL
*
* @struct CJoyEff |
*
* A dummy <i IDirectInputEffectDriver> object for the
* generic joystick.
*
* @field IDirectInputEffectDriver | didc |
*
* The object (containing vtbl).
*
* @field BOOL | fCritInited:1 |
*
* Set if the critical section has been initialized.
*
* @field DWORD | state |
*
* The current device state.
*
* @field LONG | cCrit |
*
* Number of times the critical section has been taken.
* Used only in XDEBUG to check whether the caller is
* releasing the object while another method is using it.
*
* @field DWORD | thidCrit |
*
* The thread that is currently in the critical section.
* Used only in DEBUG for internal consistency checking.
*
* @field CRITICAL_SECTION | crst |
*
* Object critical section. Must be taken when accessing
* volatile member variables.
*
* @field JEFFECT | rgjeff[cjeffMax] |
*
* Information for each effect.
*
*****************************************************************************/
#define cjeffMax 8 /* Up to 8 simultaneous effects */
typedef struct CJoyEff {
/* Supported interfaces */
IDirectInputEffectDriver ded;
BOOL fCritInited;
DWORD state;
DWORD dwGain;
RD(LONG cCrit;)
D(DWORD thidCrit;)
CRITICAL_SECTION crst;
JEFFECT rgjeff[cjeffMax];
} CJoyEff, DJE, *PDJE;
typedef IDirectInputEffectDriver DED, *PDED;
#define ThisClass CJoyEff
#define ThisInterface IDirectInputEffectDriver
#define riidExpected &IID_IDirectInputEffectDriver
/*****************************************************************************
*
* CJoyEff::QueryInterface (from IUnknown)
* CJoyEff::AddRef (from IUnknown)
* CJoyEff::Release (from IUnknown)
*
*****************************************************************************/
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | QueryInterface |
*
* Gives a client access to other interfaces on an object.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm IN REFIID | riid |
*
* The requested interface's IID.
*
* @parm OUT LPVOID * | ppvObj |
*
* Receives a pointer to the obtained interface.
*
* @returns
*
* Returns a COM error code.
*
* @xref OLE documentation for <mf IUnknown::QueryInterface>.
*
*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | AddRef |
*
* Increments the reference count for the interface.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @returns
*
* Returns the object reference count.
*
* @xref OLE documentation for <mf IUnknown::AddRef>.
*
*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | Release |
*
* Decrements the reference count for the interface.
* If the reference count on the object falls to zero,
* the object is freed from memory.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @returns
*
* Returns the object reference count.
*
* @xref OLE documentation for <mf IUnknown::Release>.
*
*****************************************************************************
*
* @doc INTERNAL
*
* @method HRESULT | CJoyEff | QIHelper |
*
* We don't have any dynamic interfaces and simply forward
* to <f Common_QIHelper>.
*
* @parm IN REFIID | riid |
*
* The requested interface's IID.
*
* @parm OUT LPVOID * | ppvObj |
*
* Receives a pointer to the obtained interface.
*
*****************************************************************************
*
* @doc INTERNAL
*
* @method HRESULT | CJoyEff | AppFinalize |
*
* We don't have any weak pointers, so we can just
* forward to <f Common_Finalize>.
*
* @parm PV | pvObj |
*
* Object being released from the application's perspective.
*
*****************************************************************************/
#ifdef DEBUG
Default_QueryInterface(CJoyEff)
Default_AddRef(CJoyEff)
Default_Release(CJoyEff)
#else
#define CJoyEff_QueryInterface Common_QueryInterface
#define CJoyEff_AddRef Common_AddRef
#define CJoyEff_Release Common_Release
#endif
#define CJoyEff_QIHelper Common_QIHelper
#define CJoyEff_AppFinalize Common_AppFinalize
/*****************************************************************************
*
* @doc INTERNAL
*
* @func void | CJoyEff_Finalize |
*
* Releases the resources of the device.
*
* @parm PV | pvObj |
*
* Object being released. Note that it may not have been
* completely initialized, so everything should be done
* carefully.
*
*****************************************************************************/
void INTERNAL
CJoyEff_Finalize(PV pvObj)
{
PDJE this = pvObj;
if (this->fCritInited) {
DeleteCriticalSection(&this->crst);
}
}
/*****************************************************************************
*
* @doc INTERNAL
*
* @method void | CJoyEff | EnterCrit |
*
* Enter the object critical section.
*
* @cwrap PDJE | this
*
*****************************************************************************/
void EXTERNAL
CJoyEff_EnterCrit(PDJE this)
{
EnterCriticalSection(&this->crst);
D(this->thidCrit = GetCurrentThreadId());
RD(InterlockedIncrement(&this->cCrit));
}
/*****************************************************************************
*
* @doc INTERNAL
*
* @method void | CJoyEff | LeaveCrit |
*
* Leave the object critical section.
*
* @cwrap PDJE | this
*
*****************************************************************************/
void EXTERNAL
CJoyEff_LeaveCrit(PDJE this)
{
#ifdef XDEBUG
AssertF(this->cCrit);
AssertF(this->thidCrit == GetCurrentThreadId());
if (InterlockedDecrement(&this->cCrit) == 0) {
D(this->thidCrit = 0);
}
#endif
LeaveCriticalSection(&this->crst);
}
/*****************************************************************************
*
* @doc INTERNAL
*
* @method BOOL | CJoyEff | InCrit |
*
* Nonzero if we are in the critical section.
*
*****************************************************************************/
#ifdef DEBUG
BOOL INTERNAL
CJoyEff_InCrit(PDJE this)
{
return this->cCrit && this->thidCrit == GetCurrentThreadId();
}
#endif
/*****************************************************************************
*
* @doc INTERNAL
*
* @method HRESULT | CJoyEff | IsValidId |
*
* Determine whether the effect pseudo-handle is valid.
* If so, returns a pointer to the <t JEFFECT>.
*
* @cwrap PDJE | this
*
* @parm DWORD | dwId |
*
* Putative ID number.
*
* @parm PJEFFECT * | ppjeff |
*
* Receives pointer to the <t JEFFECT> on success.
*
*****************************************************************************/
HRESULT INTERNAL
CJoyEff_IsValidId(PDJE this, DWORD dwId, PJEFFECT *ppjeff)
{
HRESULT hres;
AssertF(CJoyEff_InCrit(this));
if (dwId) {
PJEFFECT pjeff = &this->rgjeff[dwId - 1];
if (pjeff->fInUse) {
*ppjeff = pjeff;
hres = S_OK;
} else {
hres = E_HANDLE;
}
} else {
hres = E_HANDLE;
}
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | DeviceID |
*
* Inform the driver of the identity of the device.
*
* For example, if a device driver is passed
* <p dwExternalID> = 2 and <p dwInteralID> = 1,
* then this means that unit 1 on the device
* corresponds to joystick ID number 2.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwDirectInputVersion |
*
* The version of DirectInput that loaded the
* effect driver.
*
* @parm DWORD | dwExternalID |
*
* The joystick ID number being used.
* The Windows joystick subsystem allocates external IDs.
*
* If the <p lpHIDInfo> field is non-<c NULL> then this
* parameter should be ignored.
*
* @parm DWORD | fBegin |
*
* Nonzero if access to the device is beginning.
* Zero if the access to the device is ending.
*
* @parm DWORD | dwInternalID |
*
* Internal joystick id. The device driver manages
* internal IDs.
*
* If the <p lpHIDInfo> field is non-<c NULL> then this
* parameter should be ignored.
*
* @parm LPVOID | lpHIDInfo |
*
* If the underlying device is not a HID device, then this
* parameter is <c NULL>.
*
* If the underlying device is a HID device, then this
* parameter points to a <t DIHIDFFINITINFO> structure
* which informs the driver of HID information.
*
* @returns
*
* <c S_OK> if the operation completed successfully.
*
* An error code if something is wrong.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_DeviceID(PDED pded, DWORD dwDIVer, DWORD dwExternalID, DWORD fBegin,
DWORD dwInternalID, LPVOID pvReserved)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::DeviceID,
(_ "pxuuu", pded, dwDIVer, dwExternalID, fBegin, dwInternalID));
this = _thisPvNm(pded, ded);
dwDIVer;
dwExternalID;
fBegin;
dwInternalID;
pvReserved;
hres = S_OK;
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | Escape |
*
* Escape to the driver. This method is called
* in response to an application invoking the
* <mf IDirectInputDevice8::Escape> method.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The joystick ID number being used.
*
* @parm DWORD | dwEffect |
*
* If the application invoked the
* <mf IDirectInputEffect::Escape> method, then
* <p dwEffect> contains the handle (returned by
* <mf IDirectInputEffectDriver::DownloadEffect>)
* of the effect at which the command is directed.
*
* If the application invoked the
* <mf IDirectInputDevice8::Escape> method, then
* <p dwEffect> is zero.
*
* @parm LPDIEFFESCAPE | pesc |
*
* Pointer to a <t DIEFFESCAPE> structure which describes
* the command to be sent. On success, the
* <e DIEFFESCAPE.cbOutBuffer> field contains the number
* of bytes of the output buffer actually used.
*
* DirectInput has already validated that the
* <e DIEFFESCAPE.lpvOutBuffer> and
* <e DIEFFESCAPE.lpvInBuffer> and fields
* point to valid memory.
*
* @returns
*
* <c S_OK> if the operation completed successfully.
*
* An error code if something is wrong.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_Escape(PDED pded, DWORD dwId, DWORD dwEffect, LPDIEFFESCAPE pesc)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::Escape,
(_ "puxx", pded, dwId, dwEffect, pesc->dwCommand));
this = _thisPvNm(pded, ded);
dwId;
dwEffect;
pesc;
hres = E_NOTIMPL;
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | SetGain |
*
* Set the overall device gain.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The joystick ID number being used.
*
* @parm DWORD | dwGain |
*
* The new gain value.
*
* If the value is out of range for the device, the device
* should use the nearest supported value and return
* <c DI_TRUNCATED>.
*
* @returns
*
* <c S_OK> if the operation completed successfully.
*
* An error code if something is wrong.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_SetGain(PDED pded, DWORD dwId, DWORD dwGain)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::SetGain,
(_ "puu", pded, dwId, dwGain));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
this->dwGain = dwGain;
CJoyEff_LeaveCrit(this);
hres = S_OK;
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | SendForceFeedbackCommand |
*
* Send a command to the device.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwCommand |
*
* Command, one of the <c DISFFC_*> values.
*
* @returns
* <c S_OK> on success.
*
* @devnote
*
* Semantics unclear.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_SendForceFeedbackCommand(PDED pded, DWORD dwId, DWORD dwCmd)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::SendForceFeedbackCommand,
(_ "pux", pded, dwId, dwCmd));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
dwCmd;
this->state = dwCmd;
/*
* On a reset, all effects are destroyed.
*/
if (dwCmd & DISFFC_RESET) {
DWORD ijeff;
for (ijeff = 0; ijeff < cjeffMax; ijeff++) {
this->rgjeff[ijeff].fInUse = FALSE;
}
}
CJoyEff_LeaveCrit(this);
hres = S_OK;
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | GetForceFeedbackState |
*
* Retrieve the force feedback state for the device.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm LPDEVICESTATE | pds |
*
* Receives device state.
*
* DirectInput will set the <e DIDEVICESTATE.dwSize> field
* to sizeof(DIDEVICESTATE) before calling this method.
* @returns
* <c S_OK> on success.
*
* @devnote
*
* Semantics unclear.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_GetForceFeedbackState(PDED pded, DWORD dwId, LPDIDEVICESTATE pds)
{
PDJE this;
HRESULT hres;
DWORD ijeff, cjeff, cjeffPlaying;
EnterProcI(IDirectInputEffectDriver::Joy::GetForceFeedbackState,
(_ "pup", pded, dwId, pds));
this = _thisPvNm(pded, ded);
dwId;
pds;
if (pds->dwSize == cbX(*pds)) {
CJoyEff_EnterCrit(this);
/*
* Count how many effects are in use, and return it as a percentage.
*/
cjeff = cjeffPlaying = 0;
for (ijeff = 0; ijeff < cjeffMax; ijeff++) {
PJEFFECT pjeff = &this->rgjeff[ijeff];
if (pjeff->fInUse) {
cjeff++;
if (pjeff->tmStart &&
GetTickCount() - pjeff->tmStart < pjeff->tmDuration) {
cjeffPlaying++;
}
}
}
pds->dwLoad = MulDiv(100, cjeff, cjeffMax);
/*
* If there are no effects downloaded, then we are empty.
*/
pds->dwState = 0;
if (cjeff == 0) {
pds->dwState |= DIGFFS_EMPTY;
} else
/*
* If there are no effects playing, then we are stopped.
*/
if (cjeffPlaying == 0) {
pds->dwState |= DIGFFS_STOPPED;
}
/*
* Actuators are always on (dumb fake hardware)
*/
pds->dwState |= DIGFFS_ACTUATORSON;
CJoyEff_LeaveCrit(this);
hres = S_OK;
} else {
hres = E_INVALIDARG;
}
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | DownloadEffect |
*
* Send an effect to the device.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwEffectId |
*
* Internal identifier for the effect, taken from
* the <t DIEFFECTATTRIBUTES> structure for the effect
* as stored in the registry.
*
* @parm IN OUT LPDWORD | pdwEffect |
*
* On entry, contains the handle of the effect being
* downloaded. If the value is zero, then a new effect
* is downloaded. If the value is nonzero, then an
* existing effect is modified.
*
* On exit, contains the new effect handle.
*
* On failure, set to zero if the effect is lost,
* or left alone if the effect is still valid with
* its old parameters.
*
* Note that zero is never a valid effect handle.
*
*
* @parm LPCDIEFFECT | peff |
*
* The new parameters for the effect. The axis and button
* values have been converted to object identifiers
* as follows:
*
* - One type specifier:
* <c DIDFT_RELAXIS>,
* <c DIDFT_ABSAXIS>,
* <c DIDFT_PSHBUTTON>,
* <c DIDFT_TGLBUTTON>,
* <c DIDFT_POV>.
*
* - One instance specifier:
* <c DIDFT_MAKEINSTANCE>(n).
*
* Other bits are reserved and should be ignored.
*
* For example, the value 0x0200104 corresponds to
* the type specifier <c DIDFT_PSHBUTTON> and
* the instance specifier <c DIDFT_MAKEINSTANCE>(1),
* which together indicate that the effect should
* be associated with button 1. Axes, buttons, and POVs
* are each numbered starting from zero.
*
* @parm DWORD | dwFlags |
*
* Zero or more <c DIEP_*> flags specifying which
* portions of the effect information has changed from
* the effect already on the device.
*
* This information is passed to drivers to allow for
* optimization of effect modification. If an effect
* is being modified, a driver may be able to update
* the effect <y in situ> and transmit to the device
* only the information that has changed.
*
* Drivers are not, however, required to implement this
* optimization. All fields in the <t DIEFFECT> structure
* pointed to by the <p peff> parameter are valid, and
* a driver may choose simply to update all parameters of
* the effect at each download.
*
* @returns
* <c S_OK> on success.
*
* @devnote
*
* This implies that 0 is never a valid effect handle value.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_DownloadEffect(PDED pded, DWORD dwId, DWORD dwEffectId,
LPDWORD pdwEffect, LPCDIEFFECT peff, DWORD fl)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::DownloadEffect,
(_ "puxxpx", pded, dwId, dwEffectId, *pdwEffect, peff, fl));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
fl;
if (dwEffectId == 1) {
PJEFFECT pjeff;
DWORD dwGain;
/*
* Parameter validation goes here, if any.
*
* Envelope parameter is ignored.
*/
if (peff->cAxes == 0) { /* Zero axes? Nice try */
hres = E_INVALIDARG;
goto done;
}
/*
* Pin above-nominal values to DI_FFNOMINALMAX because
* we don't support overgain.
*/
dwGain = min(peff->dwGain, DI_FFNOMINALMAX);
/*
* We do not support triggers.
*/
if (peff->dwTriggerButton != DIEB_NOTRIGGER) {
hres = E_NOTIMPL;
goto done;
}
/*
* If no downloading in effect, then we're done.
*/
if (fl & DIEP_NODOWNLOAD) {
hres = S_OK;
goto done;
}
if (*pdwEffect) {
hres = CJoyEff_IsValidId(this, *pdwEffect, &pjeff);
if (FAILED(hres)) {
goto done;
}
} else {
DWORD ijeff;
for (ijeff = 0; ijeff < cjeffMax; ijeff++) {
if (!this->rgjeff[ijeff].fInUse) {
this->rgjeff[ijeff].fInUse = TRUE;
pjeff = &this->rgjeff[ijeff];
goto haveEffect;
}
}
hres = DIERR_DEVICEFULL;
goto done;
}
haveEffect:;
SquirtSqflPtszV(sqfl, TEXT("dwFlags=%08x"), peff->dwFlags);
SquirtSqflPtszV(sqfl, TEXT("cAxes=%d"), peff->cAxes);
for (fl = 0; fl < peff->cAxes; fl++) {
SquirtSqflPtszV(sqfl, TEXT(" Axis%2d=%08x Direction=%5d"),
fl, peff->rgdwAxes[fl],
peff->rglDirection[fl]);
}
SquirtSqflPtszV(sqfl, TEXT("dwTrigger=%08x"), peff->dwTriggerButton);
pjeff->tmDuration = peff->dwDuration / 1000;
*pdwEffect = (DWORD)(pjeff - this->rgjeff) + 1; //we are sure this cast will not cause problem
hres = S_OK;
} else {
hres = E_NOTIMPL;
}
done:;
CJoyEff_LeaveCrit(this);
ExitOleProc();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | DestroyEffect |
*
* Remove an effect from the device.
*
* If the effect is playing, the driver should stop it
* before unloading it.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwEffect |
*
* The effect to be destroyed.
*
* @returns
* <c S_OK> on success.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_DestroyEffect(PDED pded, DWORD dwId, DWORD dwEffect)
{
PDJE this;
PJEFFECT pjeff;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::DestroyEffect,
(_ "pux", pded, dwId, dwEffect));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
hres = CJoyEff_IsValidId(this, dwEffect, &pjeff);
if (SUCCEEDED(hres)) {
pjeff->fInUse = 0;
}
CJoyEff_LeaveCrit(this);
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | StartEffect |
*
* Begin playback of an effect.
*
* If the effect is already playing, then it is restarted
* from the beginning.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwEffect |
*
* The effect to be played.
*
* @parm DWORD | dwMode |
*
* How the effect is to affect other effects.
*
* This parameter consists of zero or more
* <c DIES_*> flags. Note, however, that the driver
* will never receive the <c DIES_NODOWNLOAD> flag;
* the <c DIES_NODOWNLOAD> flag is managed by
* DirectInput and not the driver.
*
* @parm DWORD | dwCount |
*
* Number of times the effect is to be played.
*
* @returns
* <c S_OK> on success.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_StartEffect(PDED pded, DWORD dwId, DWORD dwEffect,
DWORD dwMode, DWORD dwCount)
{
PDJE this;
PJEFFECT pjeff;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::StartEffect,
(_ "puxxu", pded, dwId, dwEffect, dwMode, dwCount));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
hres = CJoyEff_IsValidId(this, dwEffect, &pjeff);
if (SUCCEEDED(hres)) {
if (pjeff->tmStart) {
if (GetTickCount() - pjeff->tmStart < pjeff->tmDuration) {
/* Already playing */
hres = hresLe(ERROR_BUSY);
} else {
pjeff->tmStart = GetTickCount();
hres = S_OK;
}
} else {
pjeff->tmStart = GetTickCount();
hres = S_OK;
}
}
CJoyEff_LeaveCrit(this);
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | StopEffect |
*
* Halt playback of an effect.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwEffect |
*
* The effect to be stopped.
*
* @returns
* <c S_OK> on success.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_StopEffect(PDED pded, DWORD dwId, DWORD dwEffect)
{
PDJE this;
PJEFFECT pjeff;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::StopEffect,
(_ "pux", pded, dwId, dwEffect));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
hres = CJoyEff_IsValidId(this, dwEffect, &pjeff);
if (SUCCEEDED(hres)) {
if (pjeff->tmStart) {
if (GetTickCount() - pjeff->tmStart < pjeff->tmDuration) {
/* It is still playing; stop it */
hres = S_OK;
} else {
hres = S_FALSE; /* It already stopped on its own */
}
pjeff->tmStart = 0;
} else {
hres = S_FALSE; /* It was never started */
}
}
CJoyEff_LeaveCrit(this);
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | GetEffectStatus |
*
* Obtain information about an effect.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm DWORD | dwId |
*
* The external joystick number being addressed.
*
* @parm DWORD | dwEffect |
*
* The effect to be queried.
*
* @parm LPDWORD | pdwStatus |
*
* Receives the effect status.
*
* @returns
* <c S_OK> on success.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_GetEffectStatus(PDED pded, DWORD dwId, DWORD dwEffect,
LPDWORD pdwStatus)
{
PDJE this;
PJEFFECT pjeff;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::StopEffect,
(_ "pux", pded, dwId, dwEffect));
this = _thisPvNm(pded, ded);
CJoyEff_EnterCrit(this);
dwId;
hres = CJoyEff_IsValidId(this, dwEffect, &pjeff);
if (SUCCEEDED(hres)) {
DWORD dwStatus;
dwStatus = 0;
if (pjeff->tmStart &&
GetTickCount() - pjeff->tmStart < pjeff->tmDuration) {
dwStatus |= DEV_STS_EFFECT_RUNNING;
}
*pdwStatus = dwStatus;
hres = S_OK;
}
CJoyEff_LeaveCrit(this);
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* @doc DDK
*
* @method HRESULT | IDirectInputEffectDriver | GetVersions |
*
* Obtain version information about the force feedback
* hardware and driver.
*
* @cwrap LPDIRECTINPUTEFFECTDRIVER | lpEffectDriver
*
* @parm LPDIDRIVERVERSIONS | pvers |
*
* A structure which should be filled in with version information
* describing the hardware, firmware, and driver.
*
* DirectInput will set the <e DIDRIVERVERSIONS.dwSize> field
* to sizeof(DIDRIVERVERSIONS) before calling this method.
*
* @returns
* <c S_OK> on success.
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_GetVersions(PDED pded, LPDIDRIVERVERSIONS pvers)
{
PDJE this;
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::GetVersions, (_ "pux", pded));
this = _thisPvNm(pded, ded);
/*
* Returning E_NOTIMPL causes DirectInput to ask the VxD for the same
* information.
*/
hres = E_NOTIMPL;
ExitOleProcR();
return hres;
}
/*****************************************************************************
*
* CJoyEff_New (constructor)
*
*****************************************************************************/
STDMETHODIMP
CJoyEff_New(PUNK punkOuter, RIID riid, PPV ppvObj)
{
HRESULT hres;
EnterProcI(IDirectInputEffectDriver::Joy::<constructor>,
(_ "Gp", riid, ppvObj));
hres = Common_NewRiid(CJoyEff, punkOuter, riid, ppvObj);
if (SUCCEEDED(hres)) {
/* Must use _thisPv if multiple interfaces supported */
PDJE this = _thisPvNm(*ppvObj, ded);
/*
* The critical section must be the very first thing we do,
* because only Finalize checks for its existence.
*
* (We might be finalized without being initialized if the user
* passed a bogus interface to CJoyEff_New.)
*/
this->fCritInited = fInitializeCriticalSection(&this->crst);
if( !this->fCritInited )
{
Common_Unhold(this);
*ppvObj = NULL;
hres = E_OUTOFMEMORY;
}
}
ExitOleProcPpvR(ppvObj);
return hres;
}
/*****************************************************************************
*
* The long-awaited vtbls and templates
*
*****************************************************************************/
#pragma BEGIN_CONST_DATA
#define CJoyEff_Signature 0x4645454B /* "JEFF" */
Interface_Template_Begin(CJoyEff)
Primary_Interface_Template(CJoyEff, IDirectInputEffectDriver)
Interface_Template_End(CJoyEff)
Primary_Interface_Begin(CJoyEff, IDirectInputEffectDriver)
CJoyEff_DeviceID,
CJoyEff_GetVersions,
CJoyEff_Escape,
CJoyEff_SetGain,
CJoyEff_SendForceFeedbackCommand,
CJoyEff_GetForceFeedbackState,
CJoyEff_DownloadEffect,
CJoyEff_DestroyEffect,
CJoyEff_StartEffect,
CJoyEff_StopEffect,
CJoyEff_GetEffectStatus,
Primary_Interface_End(CJoyEff, IDirectInputEffectDriver)
#endif