dlls/dinput/effect_linuxinput.c

   1 /*              DirectInput Linux Event Device Effect
   2  *
   3  * Copyright 2005 Daniel Remenak
   4  *
   5  * Thanks to Google's Summer of Code Program (2005)
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23
  24 #ifdef HAVE_STRUCT_FF_EFFECT_DIRECTION
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #ifdef HAVE_LINUX_INPUT_H
  29 #  include <linux/input.h>
  30 #  undef SW_MAX
  31 #endif
  32 #include <limits.h>
  33 #include <errno.h>
  34 #ifdef HAVE_UNISTD_H
  35 #  include <unistd.h>
  36 #endif
  37 #include <math.h>
  38 #include "wine/debug.h"
  39 #include "wine/unicode.h"
  40 #include "windef.h"
  41 #include "winbase.h"
  42 #include "winerror.h"
  43 #include "dinput.h"
  44
  45 #include "device_private.h"
  46 #include "joystick_private.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(dinput);
  49
  50 static const IDirectInputEffectVtbl LinuxInputEffectVtbl;
  51 typedef struct LinuxInputEffectImpl LinuxInputEffectImpl;
  52 struct LinuxInputEffectImpl
  53 {
  54     IDirectInputEffect  IDirectInputEffect_iface;
  55     LONG                ref;
  56     GUID                guid;
  57
  58     struct ff_effect    effect; /* Effect data */
  59     int                 gain;   /* Effect gain */
  60     int                 first_axis_is_x;
  61     int*                fd;     /* Parent device */
  62     struct list        *entry;  /* Entry into the parent's list of effects */
  63 };
  64
  65 static inline LinuxInputEffectImpl *impl_from_IDirectInputEffect(IDirectInputEffect *iface)
  66 {
  67     return CONTAINING_RECORD(iface, LinuxInputEffectImpl, IDirectInputEffect_iface);
  68 }
  69
  70 /******************************************************************************
  71  *      LinuxInputEffectImpl
  72  */
  73
  74 static ULONG WINAPI LinuxInputEffectImpl_AddRef(
  75         LPDIRECTINPUTEFFECT iface)
  76 {
  77     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
  78     return InterlockedIncrement(&(This->ref));
  79 }
  80
  81 static HRESULT WINAPI LinuxInputEffectImpl_Download(
  82         LPDIRECTINPUTEFFECT iface)
  83 {
  84     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
  85
  86     TRACE("(this=%p)\n", This);
  87
  88     if (ioctl(*(This->fd), EVIOCSFF, &This->effect) == -1) {
  89         if (errno == ENOMEM) {
  90             return DIERR_DEVICEFULL;
  91         } else {
  92             FIXME("Could not upload effect. Assuming a disconnected device %d \"%s\".\n", *This->fd, strerror(errno));
  93             return DIERR_INPUTLOST;
  94         }
  95     }
  96
  97     return DI_OK;
  98 }
  99
 100 static HRESULT WINAPI LinuxInputEffectImpl_Escape(
 101         LPDIRECTINPUTEFFECT iface,
 102         LPDIEFFESCAPE pesc)
 103 {
 104     WARN("(this=%p,%p): invalid: no hardware-specific escape codes in this"
 105          " driver!\n", iface, pesc);
 106
 107     return DI_OK;
 108 }
 109
 110 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectGuid(
 111         LPDIRECTINPUTEFFECT iface,
 112         LPGUID pguid)
 113 {
 114     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 115
 116     TRACE("(this=%p,%p)\n", This, pguid);
 117
 118     *pguid = This->guid;
 119
 120     return DI_OK;
 121 }
 122
 123 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectStatus(
 124         LPDIRECTINPUTEFFECT iface,
 125         LPDWORD pdwFlags)
 126 {
 127     TRACE("(this=%p,%p)\n", iface, pdwFlags);
 128
 129     /* linux sends the effect status through an event.
 130      * that event is trapped by our parent joystick driver
 131      * and there is no clean way to pass it back to us. */
 132     FIXME("Not enough information to provide a status.\n");
 133
 134     (*pdwFlags) = 0;
 135
 136     return DI_OK;
 137 }
 138
 139 static HRESULT WINAPI LinuxInputEffectImpl_GetParameters(
 140         LPDIRECTINPUTEFFECT iface,
 141         LPDIEFFECT peff,
 142         DWORD dwFlags)
 143 {
 144     HRESULT diErr = DI_OK;
 145     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 146     TRACE("(this=%p,%p,%d)\n", This, peff, dwFlags);
 147
 148     /* Major conversion factors are:
 149      * times: millisecond (linux) -> microsecond (windows) (x * 1000)
 150      * forces: scale 0x7FFF (linux) -> scale 10000 (windows) approx ((x / 33) * 10)
 151      * angles: scale 0x7FFF (linux) -> scale 35999 (windows) approx ((x / 33) * 36)
 152      * angle bases: 0 -> -y (down) (linux) -> 0 -> +x (right) (windows)
 153      */
 154
 155     if (dwFlags & DIEP_AXES) {
 156         if (peff->cAxes < 2 /* linuxinput effects always use 2 axes, x and y */)
 157             diErr = DIERR_MOREDATA;
 158         peff->cAxes = 2;
 159         if (diErr)
 160             return diErr;
 161         else {
 162             peff->rgdwAxes[0] = DIJOFS_X;
 163             peff->rgdwAxes[1] = DIJOFS_Y;
 164         }
 165     }
 166
 167     if (dwFlags & DIEP_DIRECTION) {
 168         if (peff->cAxes < 2)
 169             diErr = DIERR_MOREDATA;
 170         peff->cAxes = 2;
 171         if (diErr)
 172             return diErr;
 173         else {
 174             if (peff->dwFlags & DIEFF_CARTESIAN) {
 175                 peff->rglDirection[0] = sin(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000;
 176                 peff->rglDirection[1] = cos(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000;
 177             } else {
 178                 /* Polar and spherical coordinates are the same for two or less
 179                  * axes.
 180                  * Note that we also use this case if NO flags are marked.
 181                  * According to MSDN, we should return the direction in the
 182                  * format that it was specified in, if no flags are marked.
 183                  */
 184                 peff->rglDirection[0] = (This->effect.direction / 33) * 36 + 9000;
 185                 if (peff->rglDirection[0] > 35999)
 186                     peff->rglDirection[0] -= 35999;
 187             }
 188         }
 189     }
 190
 191     if (dwFlags & DIEP_DURATION) {
 192         peff->dwDuration = (DWORD)This->effect.replay.length * 1000;
 193     }
 194
 195     if (dwFlags & DIEP_ENVELOPE) {
 196         struct ff_envelope* env;
 197         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 198         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 199         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 200         else env = NULL;
 201         if (env == NULL) {
 202             peff->lpEnvelope = NULL;
 203         } else if (peff->lpEnvelope == NULL) {
 204             return DIERR_INVALIDPARAM;
 205         } else {
 206             peff->lpEnvelope->dwAttackLevel = (env->attack_level / 33) * 10;
 207             peff->lpEnvelope->dwAttackTime = env->attack_length * 1000;
 208             peff->lpEnvelope->dwFadeLevel = (env->fade_level / 33) * 10;
 209             peff->lpEnvelope->dwFadeTime = env->fade_length * 1000;
 210         }
 211     }
 212
 213     if (dwFlags & DIEP_GAIN) {
 214         peff->dwGain = This->gain * 10000 / 0xFFFF;
 215     }
 216
 217     if (dwFlags & DIEP_SAMPLEPERIOD) {
 218         /* the linux input ff driver has no support for setting
 219          * the playback sample period.  0 means default. */
 220         peff->dwSamplePeriod = 0;
 221     }
 222
 223     if (dwFlags & DIEP_STARTDELAY) {
 224         peff->dwStartDelay = This->effect.replay.delay * 1000;
 225     }
 226
 227     if (dwFlags & DIEP_TRIGGERBUTTON) {
 228         FIXME("LinuxInput button mapping needs redoing; for now, assuming we're using an actual joystick.\n");
 229         peff->dwTriggerButton = DIJOFS_BUTTON(This->effect.trigger.button - BTN_JOYSTICK);
 230     }
 231
 232     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL) {
 233         peff->dwTriggerRepeatInterval = This->effect.trigger.interval * 1000;
 234     }
 235
 236     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 237         DWORD expectedsize = 0;
 238         if (This->effect.type == FF_PERIODIC) {
 239             expectedsize = sizeof(DIPERIODIC);
 240         } else if (This->effect.type == FF_CONSTANT) {
 241             expectedsize = sizeof(DICONSTANTFORCE);
 242         } else if (This->effect.type == FF_SPRING
 243                 || This->effect.type == FF_FRICTION
 244                 || This->effect.type == FF_INERTIA
 245                 || This->effect.type == FF_DAMPER) {
 246             expectedsize = sizeof(DICONDITION) * 2;
 247         } else if (This->effect.type == FF_RAMP) {
 248             expectedsize = sizeof(DIRAMPFORCE);
 249         }
 250         if (expectedsize > peff->cbTypeSpecificParams)
 251             diErr = DIERR_MOREDATA;
 252         peff->cbTypeSpecificParams = expectedsize;
 253         if (diErr)
 254             return diErr;
 255         else {
 256             if (This->effect.type == FF_PERIODIC) {
 257                 LPDIPERIODIC tsp = peff->lpvTypeSpecificParams;
 258                 tsp->dwMagnitude = (This->effect.u.periodic.magnitude / 33) * 10;
 259                 tsp->lOffset = (This->effect.u.periodic.offset / 33) * 10;
 260                 tsp->dwPhase = (This->effect.u.periodic.phase / 33) * 36;
 261                 tsp->dwPeriod = (This->effect.u.periodic.period * 1000);
 262             } else if (This->effect.type == FF_CONSTANT) {
 263                 LPDICONSTANTFORCE tsp = peff->lpvTypeSpecificParams;
 264                 tsp->lMagnitude = (This->effect.u.constant.level / 33) * 10;
 265             } else if (This->effect.type == FF_SPRING
 266                     || This->effect.type == FF_FRICTION
 267                     || This->effect.type == FF_INERTIA
 268                     || This->effect.type == FF_DAMPER) {
 269                 LPDICONDITION tsp = peff->lpvTypeSpecificParams;
 270                 int i;
 271                 for (i = 0; i < 2; ++i) {
 272                     tsp[i].lOffset = (This->effect.u.condition[i].center / 33) * 10;
 273                     tsp[i].lPositiveCoefficient = (This->effect.u.condition[i].right_coeff / 33) * 10;
 274                     tsp[i].lNegativeCoefficient = (This->effect.u.condition[i].left_coeff / 33) * 10;
 275                     tsp[i].dwPositiveSaturation = (This->effect.u.condition[i].right_saturation / 33) * 10;
 276                     tsp[i].dwNegativeSaturation = (This->effect.u.condition[i].left_saturation / 33) * 10;
 277                     tsp[i].lDeadBand = (This->effect.u.condition[i].deadband / 33) * 10;
 278                 }
 279             } else if (This->effect.type == FF_RAMP) {
 280                 LPDIRAMPFORCE tsp = peff->lpvTypeSpecificParams;
 281                 tsp->lStart = (This->effect.u.ramp.start_level / 33) * 10;
 282                 tsp->lEnd = (This->effect.u.ramp.end_level / 33) * 10;
 283             }
 284         }
 285     }
 286
 287     return diErr;
 288 }
 289
 290 static HRESULT WINAPI LinuxInputEffectImpl_Initialize(
 291         LPDIRECTINPUTEFFECT iface,
 292         HINSTANCE hinst,
 293         DWORD dwVersion,
 294         REFGUID rguid)
 295 {
 296     FIXME("(this=%p,%p,%d,%s): stub!\n",
 297          iface, hinst, dwVersion, debugstr_guid(rguid));
 298
 299     return DI_OK;
 300 }
 301
 302 static HRESULT WINAPI LinuxInputEffectImpl_QueryInterface(
 303         LPDIRECTINPUTEFFECT iface,
 304         REFIID riid,
 305         void **ppvObject)
 306 {
 307     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 308
 309     TRACE("(this=%p,%s,%p)\n", This, debugstr_guid(riid), ppvObject);
 310
 311     if (IsEqualGUID(&IID_IUnknown, riid) ||
 312         IsEqualGUID(&IID_IDirectInputEffect, riid)) {
 313             LinuxInputEffectImpl_AddRef(iface);
 314             *ppvObject = This;
 315             return 0;
 316     }
 317
 318     TRACE("Unsupported interface!\n");
 319     return E_FAIL;
 320 }
 321
 322 static HRESULT WINAPI LinuxInputEffectImpl_Start(
 323         LPDIRECTINPUTEFFECT iface,
 324         DWORD dwIterations,
 325         DWORD dwFlags)
 326 {
 327     struct input_event event;
 328     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 329
 330     TRACE("(this=%p,%d,%d)\n", This, dwIterations, dwFlags);
 331
 332     if (!(dwFlags & DIES_NODOWNLOAD)) {
 333         /* Download the effect if necessary */
 334         if (This->effect.id == -1) {
 335             HRESULT res = LinuxInputEffectImpl_Download(iface);
 336             if (res != DI_OK)
 337                 return res;
 338         }
 339     }
 340
 341     if (dwFlags & DIES_SOLO) {
 342         FIXME("Solo mode requested: should be stopping all effects here!\n");
 343     }
 344
 345     event.type = EV_FF;
 346     event.code = This->effect.id;
 347     event.value = min( dwIterations, INT_MAX );
 348     if (write(*(This->fd), &event, sizeof(event)) == -1) {
 349         FIXME("Unable to write event.  Assuming device disconnected.\n");
 350         return DIERR_INPUTLOST;
 351     }
 352
 353     return DI_OK;
 354 }
 355
 356 static HRESULT WINAPI LinuxInputEffectImpl_SetParameters(
 357         LPDIRECTINPUTEFFECT iface,
 358         LPCDIEFFECT peff,
 359         DWORD dwFlags)
 360 {
 361     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 362     DWORD type = typeFromGUID(&This->guid);
 363     HRESULT retval = DI_OK;
 364
 365     TRACE("(this=%p,%p,%d)\n", This, peff, dwFlags);
 366
 367     dump_DIEFFECT(peff, &This->guid, dwFlags);
 368
 369     if ((dwFlags & ~DIEP_NORESTART & ~DIEP_NODOWNLOAD & ~DIEP_START) == 0) {
 370         /* set everything */
 371         dwFlags = DIEP_AXES | DIEP_DIRECTION | DIEP_DURATION | DIEP_ENVELOPE |
 372             DIEP_GAIN | DIEP_SAMPLEPERIOD | DIEP_STARTDELAY | DIEP_TRIGGERBUTTON |
 373             DIEP_TRIGGERREPEATINTERVAL | DIEP_TYPESPECIFICPARAMS;
 374     }
 375
 376     if (dwFlags & DIEP_AXES) {
 377         /* the linux input effect system only supports one or two axes */
 378         if (peff->cAxes > 2)
 379             return DIERR_INVALIDPARAM;
 380         else if (peff->cAxes < 1)
 381             return DIERR_INCOMPLETEEFFECT;
 382         This->first_axis_is_x = peff->rgdwAxes[0] == DIJOFS_X;
 383     }
 384
 385     /* some of this may look funky, but it's 'cause the linux driver and directx have
 386      * different opinions about which way direction "0" is.  directx has 0 along the x
 387      * axis (left), linux has it along the y axis (down). */
 388     if (dwFlags & DIEP_DIRECTION) {
 389         if (peff->cAxes == 1) {
 390             if (peff->dwFlags & DIEFF_CARTESIAN) {
 391                 if (dwFlags & DIEP_AXES) {
 392                     if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] >= 0)
 393                         This->effect.direction = 0x4000;
 394                     else if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] < 0)
 395                         This->effect.direction = 0xC000;
 396                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] >= 0)
 397                         This->effect.direction = 0;
 398                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] < 0)
 399                         This->effect.direction = 0x8000;
 400                 }
 401             } else {
 402                 /* one-axis effects must use cartesian coords */
 403                 return DIERR_INVALIDPARAM;
 404             }
 405         } else { /* two axes */
 406             if (peff->dwFlags & DIEFF_CARTESIAN) {
 407                 LONG x, y;
 408                 if (This->first_axis_is_x) {
 409                     x = peff->rglDirection[0];
 410                     y = peff->rglDirection[1];
 411                 } else {
 412                     x = peff->rglDirection[1];
 413                     y = peff->rglDirection[0];
 414                 }
 415                 This->effect.direction = (int)((3 * M_PI / 2 - atan2(y, x)) * -0x7FFF / M_PI);
 416             } else {
 417                 /* Polar and spherical are the same for 2 axes */
 418                 /* Precision is important here, so we do double math with exact constants */
 419                 This->effect.direction = (int)(((double)peff->rglDirection[0] - 90) / 35999) * 0x7FFF;
 420             }
 421         }
 422     }
 423
 424     if (dwFlags & DIEP_DURATION)
 425         This->effect.replay.length = peff->dwDuration / 1000;
 426
 427     if (dwFlags & DIEP_ENVELOPE) {
 428         struct ff_envelope* env;
 429         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 430         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 431         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 432         else env = NULL;
 433
 434         if (peff->lpEnvelope == NULL) {
 435             /* if this type had an envelope, reset it */
 436             if (env) {
 437                 env->attack_length = 0;
 438                 env->attack_level = 0;
 439                 env->fade_length = 0;
 440                 env->fade_level = 0;
 441             }
 442         } else {
 443             /* did we get passed an envelope for a type that doesn't even have one? */
 444             if (!env) return DIERR_INVALIDPARAM;
 445             /* copy the envelope */
 446             env->attack_length = peff->lpEnvelope->dwAttackTime / 1000;
 447             env->attack_level = (peff->lpEnvelope->dwAttackLevel / 10) * 32;
 448             env->fade_length = peff->lpEnvelope->dwFadeTime / 1000;
 449             env->fade_level = (peff->lpEnvelope->dwFadeLevel / 10) * 32;
 450         }
 451     }
 452
 453     /* Gain and Sample Period settings are not supported by the linux
 454      * event system */
 455     if (dwFlags & DIEP_GAIN) {
 456         This->gain = 0xFFFF * peff->dwGain / 10000;
 457         TRACE("Effect gain requested but no effect gain functionality present.\n");
 458     }
 459
 460     if (dwFlags & DIEP_SAMPLEPERIOD)
 461         TRACE("Sample period requested but no sample period functionality present.\n");
 462
 463     if (dwFlags & DIEP_STARTDELAY)
 464         This->effect.replay.delay = peff->dwStartDelay / 1000;
 465
 466     if (dwFlags & DIEP_TRIGGERBUTTON) {
 467         if (peff->dwTriggerButton != -1) {
 468             FIXME("Linuxinput button mapping needs redoing, assuming we're using a joystick.\n");
 469             FIXME("Trigger button translation not yet implemented!\n");
 470         }
 471         This->effect.trigger.button = 0;
 472     }
 473
 474     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL)
 475         This->effect.trigger.interval = peff->dwTriggerRepeatInterval / 1000;
 476
 477     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 478         if (!(peff->lpvTypeSpecificParams))
 479             return DIERR_INCOMPLETEEFFECT;
 480         if (type == DIEFT_PERIODIC) {
 481             LPCDIPERIODIC tsp;
 482             if (peff->cbTypeSpecificParams != sizeof(DIPERIODIC))
 483                 return DIERR_INVALIDPARAM;
 484             tsp = peff->lpvTypeSpecificParams;
 485             This->effect.u.periodic.magnitude = (tsp->dwMagnitude / 10) * 32;
 486             This->effect.u.periodic.offset = (tsp->lOffset / 10) * 32;
 487             This->effect.u.periodic.phase = (tsp->dwPhase / 9) * 8; /* == (/ 36 * 32) */
 488             This->effect.u.periodic.period = tsp->dwPeriod / 1000;
 489         } else if (type == DIEFT_CONSTANTFORCE) {
 490             LPCDICONSTANTFORCE tsp;
 491             if (peff->cbTypeSpecificParams != sizeof(DICONSTANTFORCE))
 492                 return DIERR_INVALIDPARAM;
 493             tsp = peff->lpvTypeSpecificParams;
 494             This->effect.u.constant.level = (max(min(tsp->lMagnitude, 10000), -10000) / 10) * 32;
 495         } else if (type == DIEFT_RAMPFORCE) {
 496             LPCDIRAMPFORCE tsp;
 497             if (peff->cbTypeSpecificParams != sizeof(DIRAMPFORCE))
 498                 return DIERR_INVALIDPARAM;
 499             tsp = peff->lpvTypeSpecificParams;
 500             This->effect.u.ramp.start_level = (tsp->lStart / 10) * 32;
 501             This->effect.u.ramp.end_level = (tsp->lEnd / 10) * 32;
 502         } else if (type == DIEFT_CONDITION) {
 503             LPCDICONDITION tsp = peff->lpvTypeSpecificParams;
 504             if (peff->cbTypeSpecificParams == sizeof(DICONDITION)) {
 505                 /* One condition block.  This needs to be rotated to direction,
 506                  * and expanded to separate x and y conditions. */
 507                 int i;
 508                 double factor[2];
 509                 factor[0] = asin((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 510                 factor[1] = acos((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 511                 for (i = 0; i < 2; ++i) {
 512                     This->effect.u.condition[i].center = (int)(factor[i] * (tsp->lOffset / 10) * 32);
 513                     This->effect.u.condition[i].right_coeff = (int)(factor[i] * (tsp->lPositiveCoefficient / 10) * 32);
 514                     This->effect.u.condition[i].left_coeff = (int)(factor[i] * (tsp->lNegativeCoefficient / 10) * 32);
 515                     This->effect.u.condition[i].right_saturation = (int)(factor[i] * (tsp->dwPositiveSaturation / 10) * 32);
 516                     This->effect.u.condition[i].left_saturation = (int)(factor[i] * (tsp->dwNegativeSaturation / 10) * 32);
 517                     This->effect.u.condition[i].deadband = (int)(factor[i] * (tsp->lDeadBand / 10) * 32);
 518                 }
 519             } else if (peff->cbTypeSpecificParams == 2 * sizeof(DICONDITION)) {
 520                 /* Two condition blocks.  Direct parameter copy. */
 521                 int i;
 522                 for (i = 0; i < 2; ++i) {
 523                     This->effect.u.condition[i].center = (tsp[i].lOffset / 10) * 32;
 524                     This->effect.u.condition[i].right_coeff = (tsp[i].lPositiveCoefficient / 10) * 32;
 525                     This->effect.u.condition[i].left_coeff = (tsp[i].lNegativeCoefficient / 10) * 32;
 526                     This->effect.u.condition[i].right_saturation = (tsp[i].dwPositiveSaturation / 10) * 32;
 527                     This->effect.u.condition[i].left_saturation = (tsp[i].dwNegativeSaturation / 10) * 32;
 528                     This->effect.u.condition[i].deadband = (tsp[i].lDeadBand / 10) * 32;
 529                 }
 530             } else {
 531                 return DIERR_INVALIDPARAM;
 532             }
 533         } else {
 534             FIXME("Custom force types are not supported\n");
 535             return DIERR_INVALIDPARAM;
 536         }
 537     }
 538
 539     if (!(dwFlags & DIEP_NODOWNLOAD))
 540         retval = LinuxInputEffectImpl_Download(iface);
 541     if (retval != DI_OK)
 542         return DI_DOWNLOADSKIPPED;
 543
 544     if (dwFlags & DIEP_NORESTART)
 545         TRACE("DIEP_NORESTART: not handled (we have no control of that).\n");
 546
 547     if (dwFlags & DIEP_START)
 548         retval = LinuxInputEffectImpl_Start(iface, 1, 0);
 549     if (retval != DI_OK)
 550         return retval;
 551
 552     return DI_OK;
 553 }
 554
 555 static HRESULT WINAPI LinuxInputEffectImpl_Stop(
 556         LPDIRECTINPUTEFFECT iface)
 557 {
 558     struct input_event event;
 559     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 560
 561     TRACE("(this=%p)\n", This);
 562
 563     event.type = EV_FF;
 564     event.code = This->effect.id;
 565     event.value = 0;
 566     /* we don't care about the success or failure of this call */
 567     write(*(This->fd), &event, sizeof(event));
 568
 569     return DI_OK;
 570 }
 571
 572 static HRESULT WINAPI LinuxInputEffectImpl_Unload(
 573         LPDIRECTINPUTEFFECT iface)
 574 {
 575     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 576     TRACE("(this=%p)\n", This);
 577
 578     /* Erase the downloaded effect */
 579     if (ioctl(*(This->fd), EVIOCRMFF, This->effect.id) == -1)
 580         return DIERR_INVALIDPARAM;
 581
 582     /* Mark the effect as deallocated */
 583     This->effect.id = -1;
 584
 585     return DI_OK;
 586 }
 587
 588 static ULONG WINAPI LinuxInputEffectImpl_Release(LPDIRECTINPUTEFFECT iface)
 589 {
 590     LinuxInputEffectImpl *This = impl_from_IDirectInputEffect(iface);
 591     ULONG ref = InterlockedDecrement(&(This->ref));
 592
 593     if (ref == 0)
 594     {
 595         LinuxInputEffectImpl_Stop(iface);
 596         LinuxInputEffectImpl_Unload(iface);
 597         list_remove(This->entry);
 598         HeapFree(GetProcessHeap(), 0, LIST_ENTRY(This->entry, effect_list_item, entry));
 599         HeapFree(GetProcessHeap(), 0, This);
 600     }
 601     return ref;
 602 }
 603
 604 /******************************************************************************
 605  *      LinuxInputEffect
 606  */
 607
 608 DECLSPEC_HIDDEN HRESULT linuxinput_create_effect(
 609         int* fd,
 610         REFGUID rguid,
 611         struct list *parent_list_entry,
 612         LPDIRECTINPUTEFFECT* peff)
 613 {
 614     LinuxInputEffectImpl* newEffect = HeapAlloc(GetProcessHeap(),
 615         HEAP_ZERO_MEMORY, sizeof(LinuxInputEffectImpl));
 616     DWORD type = typeFromGUID(rguid);
 617
 618     newEffect->IDirectInputEffect_iface.lpVtbl = &LinuxInputEffectVtbl;
 619     newEffect->ref = 1;
 620     newEffect->guid = *rguid;
 621     newEffect->fd = fd;
 622     newEffect->gain = 0xFFFF;
 623
 624     /* set the type.  this cannot be changed over the effect's life. */
 625     switch (type) {
 626         case DIEFT_PERIODIC:
 627             newEffect->effect.type = FF_PERIODIC;
 628             if (IsEqualGUID(rguid, &GUID_Sine)) {
 629                 newEffect->effect.u.periodic.waveform = FF_SINE;
 630             } else if (IsEqualGUID(rguid, &GUID_Triangle)) {
 631                 newEffect->effect.u.periodic.waveform = FF_TRIANGLE;
 632             } else if (IsEqualGUID(rguid, &GUID_Square)) {
 633                 newEffect->effect.u.periodic.waveform = FF_SQUARE;
 634             } else if (IsEqualGUID(rguid, &GUID_SawtoothUp)) {
 635                 newEffect->effect.u.periodic.waveform = FF_SAW_UP;
 636             } else if (IsEqualGUID(rguid, &GUID_SawtoothDown)) {
 637                 newEffect->effect.u.periodic.waveform = FF_SAW_DOWN;
 638             }
 639             break;
 640         case DIEFT_CONSTANTFORCE:
 641             newEffect->effect.type = FF_CONSTANT;
 642             break;
 643         case DIEFT_RAMPFORCE:
 644             newEffect->effect.type = FF_RAMP;
 645             break;
 646         case DIEFT_CONDITION:
 647             if (IsEqualGUID(rguid, &GUID_Spring)) {
 648                 newEffect->effect.type = FF_SPRING;
 649             } else if (IsEqualGUID(rguid, &GUID_Friction)) {
 650                 newEffect->effect.type = FF_FRICTION;
 651             } else if (IsEqualGUID(rguid, &GUID_Inertia)) {
 652                 newEffect->effect.type = FF_INERTIA;
 653             } else if (IsEqualGUID(rguid, &GUID_Damper)) {
 654                 newEffect->effect.type = FF_DAMPER;
 655             }
 656             break;
 657         case DIEFT_CUSTOMFORCE:
 658             FIXME("Custom forces are not supported.\n");
 659             HeapFree(GetProcessHeap(), 0, newEffect);
 660             return DIERR_INVALIDPARAM;
 661         default:
 662             FIXME("Unknown force type 0x%x.\n", type);
 663             HeapFree(GetProcessHeap(), 0, newEffect);
 664             return DIERR_INVALIDPARAM;
 665     }
 666
 667     /* mark as non-uploaded */
 668     newEffect->effect.id = -1;
 669
 670     newEffect->entry = parent_list_entry;
 671
 672     *peff = &newEffect->IDirectInputEffect_iface;
 673
 674     TRACE("Creating linux input system effect (%p) with guid %s\n",
 675           *peff, _dump_dinput_GUID(rguid));
 676
 677     return DI_OK;
 678 }
 679
 680 DECLSPEC_HIDDEN HRESULT linuxinput_get_info_A(
 681         int fd,
 682         REFGUID rguid,
 683         LPDIEFFECTINFOA info)
 684 {
 685     DWORD type = typeFromGUID(rguid);
 686
 687     TRACE("(%d, %s, %p) type=%d\n", fd, _dump_dinput_GUID(rguid), info, type);
 688
 689     if (!info) return E_POINTER;
 690
 691     if (info->dwSize != sizeof(DIEFFECTINFOA)) return DIERR_INVALIDPARAM;
 692
 693     info->guid = *rguid;
 694
 695     info->dwEffType = type;
 696     /* the event device API does not support querying for all these things
 697      * therefore we assume that we have support for them
 698      * that's not as dangerous as it sounds, since drivers are allowed to
 699      * ignore parameters they claim to support anyway */
 700     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 701                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 702                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 703
 704     /* again, assume we have support for everything */
 705     info->dwStaticParams = DIEP_ALLPARAMS;
 706     info->dwDynamicParams = info->dwStaticParams;
 707
 708     /* yes, this is windows behavior (print the GUID_Name for name) */
 709     strcpy(info->tszName, _dump_dinput_GUID(rguid));
 710
 711     return DI_OK;
 712 }
 713
 714 DECLSPEC_HIDDEN HRESULT linuxinput_get_info_W(
 715         int fd,
 716         REFGUID rguid,
 717         LPDIEFFECTINFOW info)
 718 {
 719     DWORD type = typeFromGUID(rguid);
 720
 721     TRACE("(%d, %s, %p) type=%d\n", fd, _dump_dinput_GUID(rguid), info, type);
 722
 723     if (!info) return E_POINTER;
 724
 725     if (info->dwSize != sizeof(DIEFFECTINFOW)) return DIERR_INVALIDPARAM;
 726
 727     info->guid = *rguid;
 728
 729     info->dwEffType = type;
 730     /* the event device API does not support querying for all these things
 731      * therefore we assume that we have support for them
 732      * that's not as dangerous as it sounds, since drivers are allowed to
 733      * ignore parameters they claim to support anyway */
 734     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 735                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 736                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 737
 738     /* again, assume we have support for everything */
 739     info->dwStaticParams = DIEP_ALLPARAMS;
 740     info->dwDynamicParams = info->dwStaticParams;
 741
 742     /* yes, this is windows behavior (print the GUID_Name for name) */
 743     MultiByteToWideChar(CP_ACP, 0, _dump_dinput_GUID(rguid), -1,
 744                         info->tszName, MAX_PATH);
 745
 746     return DI_OK;
 747 }
 748
 749 static const IDirectInputEffectVtbl LinuxInputEffectVtbl = {
 750     LinuxInputEffectImpl_QueryInterface,
 751     LinuxInputEffectImpl_AddRef,
 752     LinuxInputEffectImpl_Release,
 753     LinuxInputEffectImpl_Initialize,
 754     LinuxInputEffectImpl_GetEffectGuid,
 755     LinuxInputEffectImpl_GetParameters,
 756     LinuxInputEffectImpl_SetParameters,
 757     LinuxInputEffectImpl_Start,
 758     LinuxInputEffectImpl_Stop,
 759     LinuxInputEffectImpl_GetEffectStatus,
 760     LinuxInputEffectImpl_Download,
 761     LinuxInputEffectImpl_Unload,
 762     LinuxInputEffectImpl_Escape
 763 };
 764
 765 #endif /* HAVE_STRUCT_FF_EFFECT_DIRECTION */