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 <errno.h>
  33 #ifdef HAVE_UNISTD_H
  34 #  include <unistd.h>
  35 #endif
  36 #include <math.h>
  37 #include "wine/debug.h"
  38 #include "wine/unicode.h"
  39 #include "windef.h"
  40 #include "winbase.h"
  41 #include "winerror.h"
  42 #include "dinput.h"
  43
  44 #include "device_private.h"
  45
  46 WINE_DEFAULT_DEBUG_CHANNEL(dinput);
  47
  48 static const IDirectInputEffectVtbl LinuxInputEffectVtbl;
  49 typedef struct LinuxInputEffectImpl LinuxInputEffectImpl;
  50 struct LinuxInputEffectImpl
  51 {
  52     const void *lpVtbl;
  53     LONG        ref;
  54     GUID        guid;
  55
  56     struct ff_effect    effect; /* Effect data */
  57     int                 gain;   /* Effect gain */
  58     int*                fd;     /* Parent device */
  59     struct list        *entry;  /* Entry into the parent's list of effects */
  60 };
  61
  62
  63 /******************************************************************************
  64  *      DirectInputEffect Functional Helper
  65  */
  66
  67 static DWORD _typeFromGUID(REFGUID guid)
  68 {
  69     if (IsEqualGUID(guid, &GUID_ConstantForce)) {
  70         return DIEFT_CONSTANTFORCE;
  71     } else if (IsEqualGUID(guid, &GUID_Square)
  72             || IsEqualGUID(guid, &GUID_Sine)
  73             || IsEqualGUID(guid, &GUID_Triangle)
  74             || IsEqualGUID(guid, &GUID_SawtoothUp)
  75             || IsEqualGUID(guid, &GUID_SawtoothDown)) {
  76         return DIEFT_PERIODIC;
  77     } else if (IsEqualGUID(guid, &GUID_RampForce)) {
  78         return DIEFT_RAMPFORCE;
  79     } else if (IsEqualGUID(guid, &GUID_Spring)
  80             || IsEqualGUID(guid, &GUID_Damper)
  81             || IsEqualGUID(guid, &GUID_Inertia)
  82             || IsEqualGUID(guid, &GUID_Friction)) {
  83         return DIEFT_CONDITION;
  84     } else if (IsEqualGUID(guid, &GUID_CustomForce)) {
  85         return DIEFT_CUSTOMFORCE;
  86     } else {
  87         WARN("GUID (%s) is not a known force type\n", _dump_dinput_GUID(guid));
  88         return 0;
  89     }
  90 }
  91
  92
  93 /******************************************************************************
  94  *      DirectInputEffect debug helpers
  95  */
  96
  97 static void _dump_DIEFFECT_flags(DWORD dwFlags)
  98 {
  99     if (TRACE_ON(dinput)) {
 100         unsigned int   i;
 101         static const struct {
 102             DWORD       mask;
 103             const char  *name;
 104         } flags[] = {
 105 #define FE(x) { x, #x}
 106             FE(DIEFF_CARTESIAN),
 107             FE(DIEFF_OBJECTIDS),
 108             FE(DIEFF_OBJECTOFFSETS),
 109             FE(DIEFF_POLAR),
 110             FE(DIEFF_SPHERICAL)
 111 #undef FE
 112         };
 113         for (i = 0; i < (sizeof(flags) / sizeof(flags[0])); i++)
 114             if (flags[i].mask & dwFlags)
 115                 TRACE("%s ", flags[i].name);
 116         TRACE("\n");
 117     }
 118 }
 119
 120 static void _dump_DIENVELOPE(LPCDIENVELOPE env)
 121 {
 122     if (env->dwSize != sizeof(DIENVELOPE)) {
 123         WARN("Non-standard DIENVELOPE structure size %d.\n", env->dwSize);
 124     }
 125     TRACE("Envelope has attack (level: %d time: %d), fade (level: %d time: %d)\n",
 126           env->dwAttackLevel, env->dwAttackTime, env->dwFadeLevel, env->dwFadeTime);
 127 }
 128
 129 static void _dump_DICONSTANTFORCE(LPCDICONSTANTFORCE frc)
 130 {
 131     TRACE("Constant force has magnitude %d\n", frc->lMagnitude);
 132 }
 133
 134 static void _dump_DIPERIODIC(LPCDIPERIODIC frc)
 135 {
 136     TRACE("Periodic force has magnitude %d, offset %d, phase %d, period %d\n",
 137           frc->dwMagnitude, frc->lOffset, frc->dwPhase, frc->dwPeriod);
 138 }
 139
 140 static void _dump_DIRAMPFORCE(LPCDIRAMPFORCE frc)
 141 {
 142     TRACE("Ramp force has start %d, end %d\n",
 143           frc->lStart, frc->lEnd);
 144 }
 145
 146 static void _dump_DICONDITION(LPCDICONDITION frc)
 147 {
 148     TRACE("Condition has offset %d, pos/neg coefficients %d and %d, pos/neg saturations %d and %d, deadband %d\n",
 149           frc->lOffset, frc->lPositiveCoefficient, frc->lNegativeCoefficient,
 150           frc->dwPositiveSaturation, frc->dwNegativeSaturation, frc->lDeadBand);
 151 }
 152
 153 static void _dump_DICUSTOMFORCE(LPCDICUSTOMFORCE frc)
 154 {
 155     unsigned int i;
 156     TRACE("Custom force uses %d channels, sample period %d.  Has %d samples at %p.\n",
 157           frc->cChannels, frc->dwSamplePeriod, frc->cSamples, frc->rglForceData);
 158     if (frc->cSamples % frc->cChannels != 0)
 159         WARN("Custom force has a non-integral samples-per-channel count!\n");
 160     if (TRACE_ON(dinput)) {
 161         TRACE("Custom force data (time aligned, axes in order):\n");
 162         for (i = 1; i <= frc->cSamples; ++i) {
 163             TRACE("%d ", frc->rglForceData[i]);
 164             if (i % frc->cChannels == 0)
 165                 TRACE("\n");
 166         }
 167     }
 168 }
 169
 170 static void _dump_DIEFFECT(LPCDIEFFECT eff, REFGUID guid)
 171 {
 172     unsigned int i;
 173     DWORD type = _typeFromGUID(guid);
 174
 175     TRACE("Dumping DIEFFECT structure:\n");
 176     TRACE("  - dwSize: %d\n", eff->dwSize);
 177     if ((eff->dwSize != sizeof(DIEFFECT)) && (eff->dwSize != sizeof(DIEFFECT_DX5))) {
 178         WARN("Non-standard DIEFFECT structure size %d\n", eff->dwSize);
 179     }
 180     TRACE("  - dwFlags: %d\n", eff->dwFlags);
 181     TRACE("    ");
 182     _dump_DIEFFECT_flags(eff->dwFlags);
 183     TRACE("  - dwDuration: %d\n", eff->dwDuration);
 184     TRACE("  - dwGain: %d\n", eff->dwGain);
 185     if (eff->dwGain > 10000)
 186         WARN("dwGain is out of range (>10,000)\n");
 187     TRACE("  - dwTriggerButton: %d\n", eff->dwTriggerButton);
 188     TRACE("  - dwTriggerRepeatInterval: %d\n", eff->dwTriggerRepeatInterval);
 189     TRACE("  - cAxes: %d\n", eff->cAxes);
 190     TRACE("  - rgdwAxes: %p\n", eff->rgdwAxes);
 191     if (TRACE_ON(dinput) && eff->rgdwAxes) {
 192         TRACE("    ");
 193         for (i = 0; i < eff->cAxes; ++i)
 194             TRACE("%d ", eff->rgdwAxes[i]);
 195         TRACE("\n");
 196     }
 197     TRACE("  - rglDirection: %p\n", eff->rglDirection);
 198     TRACE("  - lpEnvelope: %p\n", eff->lpEnvelope);
 199     TRACE("  - cbTypeSpecificParams: %d\n", eff->cbTypeSpecificParams);
 200     TRACE("  - lpvTypeSpecificParams: %p\n", eff->lpvTypeSpecificParams);
 201     if (eff->dwSize > sizeof(DIEFFECT_DX5))
 202         TRACE("  - dwStartDelay: %d\n", eff->dwStartDelay);
 203     if (eff->lpEnvelope != NULL)
 204         _dump_DIENVELOPE(eff->lpEnvelope);
 205     if (type == DIEFT_CONSTANTFORCE) {
 206         if (eff->cbTypeSpecificParams != sizeof(DICONSTANTFORCE)) {
 207             WARN("Effect claims to be a constant force but the type-specific params are the wrong size!\n");
 208         } else {
 209             _dump_DICONSTANTFORCE(eff->lpvTypeSpecificParams);
 210         }
 211     } else if (type == DIEFT_PERIODIC) {
 212         if (eff->cbTypeSpecificParams != sizeof(DIPERIODIC)) {
 213             WARN("Effect claims to be a periodic force but the type-specific params are the wrong size!\n");
 214         } else {
 215             _dump_DIPERIODIC(eff->lpvTypeSpecificParams);
 216         }
 217     } else if (type == DIEFT_RAMPFORCE) {
 218         if (eff->cbTypeSpecificParams != sizeof(DIRAMPFORCE)) {
 219             WARN("Effect claims to be a ramp force but the type-specific params are the wrong size!\n");
 220         } else {
 221             _dump_DIRAMPFORCE(eff->lpvTypeSpecificParams);
 222         }
 223     } else if (type == DIEFT_CONDITION) {
 224         if (eff->cbTypeSpecificParams != sizeof(DICONDITION)) {
 225             WARN("Effect claims to be a condition but the type-specific params are the wrong size!\n");
 226         } else {
 227             _dump_DICONDITION(eff->lpvTypeSpecificParams);
 228         }
 229     } else if (type == DIEFT_CUSTOMFORCE) {
 230         if (eff->cbTypeSpecificParams != sizeof(DICUSTOMFORCE)) {
 231             WARN("Effect claims to be a custom force but the type-specific params are the wrong size!\n");
 232         } else {
 233             _dump_DICUSTOMFORCE(eff->lpvTypeSpecificParams);
 234         }
 235     }
 236 }
 237
 238
 239 /******************************************************************************
 240  *      LinuxInputEffectImpl
 241  */
 242
 243 static ULONG WINAPI LinuxInputEffectImpl_AddRef(
 244         LPDIRECTINPUTEFFECT iface)
 245 {
 246     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 247     return InterlockedIncrement(&(This->ref));
 248 }
 249
 250 static HRESULT WINAPI LinuxInputEffectImpl_Download(
 251         LPDIRECTINPUTEFFECT iface)
 252 {
 253     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 254
 255     TRACE("(this=%p)\n", This);
 256
 257     if (ioctl(*(This->fd), EVIOCSFF, &This->effect) == -1) {
 258         if (errno == ENOMEM) {
 259             return DIERR_DEVICEFULL;
 260         } else {
 261             FIXME("Could not upload effect. Assuming a disconnected device %d \"%s\".\n", *This->fd, strerror(errno));
 262             return DIERR_INPUTLOST;
 263         }
 264     }
 265
 266     return DI_OK;
 267 }
 268
 269 static HRESULT WINAPI LinuxInputEffectImpl_Escape(
 270         LPDIRECTINPUTEFFECT iface,
 271         LPDIEFFESCAPE pesc)
 272 {
 273     WARN("(this=%p,%p): invalid: no hardware-specific escape codes in this"
 274          " driver!\n", iface, pesc);
 275
 276     return DI_OK;
 277 }
 278
 279 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectGuid(
 280         LPDIRECTINPUTEFFECT iface,
 281         LPGUID pguid)
 282 {
 283     LinuxInputEffectImpl *This = (LinuxInputEffectImpl*)iface;
 284
 285     TRACE("(this=%p,%p)\n", This, pguid);
 286
 287     pguid = &This->guid;
 288
 289     return DI_OK;
 290 }
 291
 292 static HRESULT WINAPI LinuxInputEffectImpl_GetEffectStatus(
 293         LPDIRECTINPUTEFFECT iface,
 294         LPDWORD pdwFlags)
 295 {
 296     TRACE("(this=%p,%p)\n", iface, pdwFlags);
 297
 298     /* linux sends the effect status through an event.
 299      * that event is trapped by our parent joystick driver
 300      * and there is no clean way to pass it back to us. */
 301     FIXME("Not enough information to provide a status.\n");
 302
 303     (*pdwFlags) = 0;
 304
 305     return DI_OK;
 306 }
 307
 308 static HRESULT WINAPI LinuxInputEffectImpl_GetParameters(
 309         LPDIRECTINPUTEFFECT iface,
 310         LPDIEFFECT peff,
 311         DWORD dwFlags)
 312 {
 313     HRESULT diErr = DI_OK;
 314     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 315     TRACE("(this=%p,%p,%d)\n", This, peff, dwFlags);
 316
 317     /* Major conversion factors are:
 318      * times: millisecond (linux) -> microsecond (windows) (x * 1000)
 319      * forces: scale 0x7FFF (linux) -> scale 10000 (windows) approx ((x / 33) * 10)
 320      * angles: scale 0x7FFF (linux) -> scale 35999 (windows) approx ((x / 33) * 36)
 321      * angle bases: 0 -> -y (down) (linux) -> 0 -> +x (right) (windows)
 322      */
 323
 324     if (dwFlags & DIEP_AXES) {
 325         if (peff->cAxes < 2 /* linuxinput effects always use 2 axes, x and y */)
 326             diErr = DIERR_MOREDATA;
 327         peff->cAxes = 2;
 328         if (diErr)
 329             return diErr;
 330         else {
 331             peff->rgdwAxes[0] = DIJOFS_X;
 332             peff->rgdwAxes[1] = DIJOFS_Y;
 333         }
 334     }
 335
 336     if (dwFlags & DIEP_DIRECTION) {
 337         if (peff->cAxes < 2)
 338             diErr = DIERR_MOREDATA;
 339         peff->cAxes = 2;
 340         if (diErr)
 341             return diErr;
 342         else {
 343             if (peff->dwFlags & DIEFF_CARTESIAN) {
 344                 peff->rglDirection[0] = (long)(sin(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000);
 345                 peff->rglDirection[1] = (long)(cos(M_PI * 3 * This->effect.direction / 0x7FFF) * 1000);
 346             } else {
 347                 /* Polar and spherical coordinates are the same for two or less
 348                  * axes.
 349                  * Note that we also use this case if NO flags are marked.
 350                  * According to MSDN, we should return the direction in the
 351                  * format that it was specified in, if no flags are marked.
 352                  */
 353                 peff->rglDirection[0] = (This->effect.direction / 33) * 36 + 9000;
 354                 if (peff->rglDirection[0] > 35999)
 355                     peff->rglDirection[0] -= 35999;
 356             }
 357         }
 358     }
 359
 360     if (dwFlags & DIEP_DURATION) {
 361         peff->dwDuration = (DWORD)This->effect.replay.length * 1000;
 362     }
 363
 364     if (dwFlags & DIEP_ENVELOPE) {
 365         struct ff_envelope* env;
 366         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 367         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 368         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 369         else env = NULL;
 370         if (env == NULL) {
 371             peff->lpEnvelope = NULL;
 372         } else if (peff->lpEnvelope == NULL) {
 373             return DIERR_INVALIDPARAM;
 374         } else {
 375             peff->lpEnvelope->dwAttackLevel = (env->attack_level / 33) * 10;
 376             peff->lpEnvelope->dwAttackTime = env->attack_length * 1000;
 377             peff->lpEnvelope->dwFadeLevel = (env->fade_level / 33) * 10;
 378             peff->lpEnvelope->dwFadeTime = env->fade_length * 1000;
 379         }
 380     }
 381
 382     if (dwFlags & DIEP_GAIN) {
 383         peff->dwGain = This->gain * 10000 / 0xFFFF;
 384     }
 385
 386     if (dwFlags & DIEP_SAMPLEPERIOD) {
 387         /* the linux input ff driver has no support for setting
 388          * the playback sample period.  0 means default. */
 389         peff->dwSamplePeriod = 0;
 390     }
 391
 392     if (dwFlags & DIEP_STARTDELAY) {
 393         peff->dwStartDelay = This->effect.replay.delay * 1000;
 394     }
 395
 396     if (dwFlags & DIEP_TRIGGERBUTTON) {
 397         FIXME("LinuxInput button mapping needs redoing; for now, assuming we're using an actual joystick.\n");
 398         peff->dwTriggerButton = DIJOFS_BUTTON(This->effect.trigger.button - BTN_JOYSTICK);
 399     }
 400
 401     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL) {
 402         peff->dwTriggerRepeatInterval = This->effect.trigger.interval * 1000;
 403     }
 404
 405     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 406         DWORD expectedsize = 0;
 407         if (This->effect.type == FF_PERIODIC) {
 408             expectedsize = sizeof(DIPERIODIC);
 409         } else if (This->effect.type == FF_CONSTANT) {
 410             expectedsize = sizeof(DICONSTANTFORCE);
 411         } else if (This->effect.type == FF_SPRING
 412                 || This->effect.type == FF_FRICTION
 413                 || This->effect.type == FF_INERTIA
 414                 || This->effect.type == FF_DAMPER) {
 415             expectedsize = sizeof(DICONDITION) * 2;
 416         } else if (This->effect.type == FF_RAMP) {
 417             expectedsize = sizeof(DIRAMPFORCE);
 418         }
 419         if (expectedsize > peff->cbTypeSpecificParams)
 420             diErr = DIERR_MOREDATA;
 421         peff->cbTypeSpecificParams = expectedsize;
 422         if (diErr)
 423             return diErr;
 424         else {
 425             if (This->effect.type == FF_PERIODIC) {
 426                 LPDIPERIODIC tsp = peff->lpvTypeSpecificParams;
 427                 tsp->dwMagnitude = (This->effect.u.periodic.magnitude / 33) * 10;
 428                 tsp->lOffset = (This->effect.u.periodic.offset / 33) * 10;
 429                 tsp->dwPhase = (This->effect.u.periodic.phase / 33) * 36;
 430                 tsp->dwPeriod = (This->effect.u.periodic.period * 1000);
 431             } else if (This->effect.type == FF_CONSTANT) {
 432                 LPDICONSTANTFORCE tsp = peff->lpvTypeSpecificParams;
 433                 tsp->lMagnitude = (This->effect.u.constant.level / 33) * 10;
 434             } else if (This->effect.type == FF_SPRING
 435                     || This->effect.type == FF_FRICTION
 436                     || This->effect.type == FF_INERTIA
 437                     || This->effect.type == FF_DAMPER) {
 438                 LPDICONDITION tsp = peff->lpvTypeSpecificParams;
 439                 int i;
 440                 for (i = 0; i < 2; ++i) {
 441                     tsp[i].lOffset = (This->effect.u.condition[i].center / 33) * 10;
 442                     tsp[i].lPositiveCoefficient = (This->effect.u.condition[i].right_coeff / 33) * 10;
 443                     tsp[i].lNegativeCoefficient = (This->effect.u.condition[i].left_coeff / 33) * 10;
 444                     tsp[i].dwPositiveSaturation = (This->effect.u.condition[i].right_saturation / 33) * 10;
 445                     tsp[i].dwNegativeSaturation = (This->effect.u.condition[i].left_saturation / 33) * 10;
 446                     tsp[i].lDeadBand = (This->effect.u.condition[i].deadband / 33) * 10;
 447                 }
 448             } else if (This->effect.type == FF_RAMP) {
 449                 LPDIRAMPFORCE tsp = peff->lpvTypeSpecificParams;
 450                 tsp->lStart = (This->effect.u.ramp.start_level / 33) * 10;
 451                 tsp->lEnd = (This->effect.u.ramp.end_level / 33) * 10;
 452             }
 453         }
 454     }
 455
 456     return diErr;
 457 }
 458
 459 static HRESULT WINAPI LinuxInputEffectImpl_Initialize(
 460         LPDIRECTINPUTEFFECT iface,
 461         HINSTANCE hinst,
 462         DWORD dwVersion,
 463         REFGUID rguid)
 464 {
 465     FIXME("(this=%p,%p,%d,%s): stub!\n",
 466          iface, hinst, dwVersion, debugstr_guid(rguid));
 467
 468     return DI_OK;
 469 }
 470
 471 static HRESULT WINAPI LinuxInputEffectImpl_QueryInterface(
 472         LPDIRECTINPUTEFFECT iface,
 473         REFIID riid,
 474         void **ppvObject)
 475 {
 476     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 477
 478     TRACE("(this=%p,%s,%p)\n", This, debugstr_guid(riid), ppvObject);
 479
 480     if (IsEqualGUID(&IID_IUnknown, riid) ||
 481         IsEqualGUID(&IID_IDirectInputEffect, riid)) {
 482             LinuxInputEffectImpl_AddRef(iface);
 483             *ppvObject = This;
 484             return 0;
 485     }
 486
 487     TRACE("Unsupported interface!\n");
 488     return E_FAIL;
 489 }
 490
 491 static HRESULT WINAPI LinuxInputEffectImpl_Start(
 492         LPDIRECTINPUTEFFECT iface,
 493         DWORD dwIterations,
 494         DWORD dwFlags)
 495 {
 496     struct input_event event;
 497     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 498
 499     TRACE("(this=%p,%d,%d)\n", This, dwIterations, dwFlags);
 500
 501     if (!(dwFlags & DIES_NODOWNLOAD)) {
 502         /* Download the effect if necessary */
 503         if (This->effect.id == -1) {
 504             HRESULT res = LinuxInputEffectImpl_Download(iface);
 505             if (res != DI_OK)
 506                 return res;
 507         }
 508     }
 509
 510     if (dwFlags & DIES_SOLO) {
 511         FIXME("Solo mode requested: should be stopping all effects here!\n");
 512     }
 513
 514     event.type = EV_FF;
 515
 516     event.code = FF_GAIN;
 517     event.value = This->gain;
 518     if (write(*(This->fd), &event, sizeof(event)) == -1)
 519         FIXME("Failed setting gain. Error: %d \"%s\".\n", errno, strerror(errno));
 520
 521     event.code = This->effect.id;
 522     event.value = dwIterations;
 523     if (write(*(This->fd), &event, sizeof(event)) == -1) {
 524         FIXME("Unable to write event.  Assuming device disconnected.\n");
 525         return DIERR_INPUTLOST;
 526     }
 527
 528     return DI_OK;
 529 }
 530
 531 static HRESULT WINAPI LinuxInputEffectImpl_SetParameters(
 532         LPDIRECTINPUTEFFECT iface,
 533         LPCDIEFFECT peff,
 534         DWORD dwFlags)
 535 {
 536     LinuxInputEffectImpl* This = (LinuxInputEffectImpl*)iface;
 537     DWORD type = _typeFromGUID(&This->guid);
 538     HRESULT retval = DI_OK;
 539
 540     TRACE("(this=%p,%p,%d)\n", This, peff, dwFlags);
 541
 542     _dump_DIEFFECT(peff, &This->guid);
 543
 544     if ((dwFlags & ~DIEP_NORESTART & ~DIEP_NODOWNLOAD & ~DIEP_START) == 0) {
 545         /* set everything */
 546         dwFlags = DIEP_AXES | DIEP_DIRECTION | DIEP_DURATION | DIEP_ENVELOPE |
 547             DIEP_GAIN | DIEP_SAMPLEPERIOD | DIEP_STARTDELAY | DIEP_TRIGGERBUTTON |
 548             DIEP_TRIGGERREPEATINTERVAL | DIEP_TYPESPECIFICPARAMS;
 549     }
 550
 551     if (dwFlags & DIEP_AXES) {
 552         /* the linux input effect system only supports one or two axes */
 553         if (peff->cAxes > 2)
 554             return DIERR_INVALIDPARAM;
 555         else if (peff->cAxes < 1)
 556             return DIERR_INCOMPLETEEFFECT;
 557     }
 558
 559     /* some of this may look funky, but it's 'cause the linux driver and directx have
 560      * different opinions about which way direction "0" is.  directx has 0 along the x
 561      * axis (left), linux has it along the y axis (down). */
 562     if (dwFlags & DIEP_DIRECTION) {
 563         if (peff->cAxes == 1) {
 564             if (peff->dwFlags & DIEFF_CARTESIAN) {
 565                 if (dwFlags & DIEP_AXES) {
 566                     if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] >= 0)
 567                         This->effect.direction = 0x4000;
 568                     else if (peff->rgdwAxes[0] == DIJOFS_X && peff->rglDirection[0] < 0)
 569                         This->effect.direction = 0xC000;
 570                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] >= 0)
 571                         This->effect.direction = 0;
 572                     else if (peff->rgdwAxes[0] == DIJOFS_Y && peff->rglDirection[0] < 0)
 573                         This->effect.direction = 0x8000;
 574                 }
 575             } else {
 576                 /* one-axis effects must use cartesian coords */
 577                 return DIERR_INVALIDPARAM;
 578             }
 579         } else { /* two axes */
 580             if (peff->dwFlags & DIEFF_CARTESIAN) {
 581                 /* avoid divide-by-zero */
 582                 if (peff->rglDirection[1] == 0) {
 583                     if (peff->rglDirection[0] >= 0)
 584                         This->effect.direction = 0x4000;
 585                     else if (peff->rglDirection[0] < 0)
 586                         This->effect.direction = 0xC000;
 587                 } else {
 588                     This->effect.direction = (int)(atan(peff->rglDirection[0] / peff->rglDirection[1]) * 0x7FFF / (3 * M_PI));
 589                 }
 590             } else {
 591                 /* Polar and spherical are the same for 2 axes */
 592                 /* Precision is important here, so we do double math with exact constants */
 593                 This->effect.direction = (int)(((double)peff->rglDirection[0] - 90) / 35999) * 0x7FFF;
 594             }
 595         }
 596     }
 597
 598     if (dwFlags & DIEP_DURATION)
 599         This->effect.replay.length = peff->dwDuration / 1000;
 600
 601     if (dwFlags & DIEP_ENVELOPE) {
 602         struct ff_envelope* env;
 603         if (This->effect.type == FF_CONSTANT) env = &This->effect.u.constant.envelope;
 604         else if (This->effect.type == FF_PERIODIC) env = &This->effect.u.periodic.envelope;
 605         else if (This->effect.type == FF_RAMP) env = &This->effect.u.ramp.envelope;
 606         else env = NULL;
 607
 608         if (peff->lpEnvelope == NULL) {
 609             /* if this type had an envelope, reset it
 610              * note that length can never be zero, so we set it to something minuscule */
 611             if (env) {
 612                 env->attack_length = 0x10;
 613                 env->attack_level = 0x7FFF;
 614                 env->fade_length = 0x10;
 615                 env->fade_level = 0x7FFF;
 616             }
 617         } else {
 618             /* did we get passed an envelope for a type that doesn't even have one? */
 619             if (!env) return DIERR_INVALIDPARAM;
 620             /* copy the envelope */
 621             env->attack_length = peff->lpEnvelope->dwAttackTime / 1000;
 622             env->attack_level = (peff->lpEnvelope->dwAttackLevel / 10) * 32;
 623             env->fade_length = peff->lpEnvelope->dwFadeTime / 1000;
 624             env->fade_level = (peff->lpEnvelope->dwFadeLevel / 10) * 32;
 625         }
 626     }
 627
 628     /* Gain and Sample Period settings are not supported by the linux
 629      * event system */
 630     if (dwFlags & DIEP_GAIN)
 631         This->gain = 0xFFFF * peff->dwGain / 10000;
 632
 633     if (dwFlags & DIEP_SAMPLEPERIOD)
 634         TRACE("Sample period requested but no sample period functionality present.\n");
 635
 636     if (dwFlags & DIEP_STARTDELAY)
 637         This->effect.replay.delay = peff->dwStartDelay / 1000;
 638
 639     if (dwFlags & DIEP_TRIGGERBUTTON) {
 640         if (peff->dwTriggerButton != -1) {
 641             FIXME("Linuxinput button mapping needs redoing, assuming we're using a joystick.\n");
 642             FIXME("Trigger button translation not yet implemented!\n");
 643         }
 644         This->effect.trigger.button = 0;
 645     }
 646
 647     if (dwFlags & DIEP_TRIGGERREPEATINTERVAL)
 648         This->effect.trigger.interval = peff->dwTriggerRepeatInterval / 1000;
 649
 650     if (dwFlags & DIEP_TYPESPECIFICPARAMS) {
 651         if (!(peff->lpvTypeSpecificParams))
 652             return DIERR_INCOMPLETEEFFECT;
 653         if (type == DIEFT_PERIODIC) {
 654             LPCDIPERIODIC tsp;
 655             if (peff->cbTypeSpecificParams != sizeof(DIPERIODIC))
 656                 return DIERR_INVALIDPARAM;
 657             tsp = peff->lpvTypeSpecificParams;
 658             This->effect.u.periodic.magnitude = (tsp->dwMagnitude / 10) * 32;
 659             This->effect.u.periodic.offset = (tsp->lOffset / 10) * 32;
 660             This->effect.u.periodic.phase = (tsp->dwPhase / 9) * 8; /* == (/ 36 * 32) */
 661             This->effect.u.periodic.period = tsp->dwPeriod / 1000;
 662         } else if (type == DIEFT_CONSTANTFORCE) {
 663             LPCDICONSTANTFORCE tsp;
 664             if (peff->cbTypeSpecificParams != sizeof(DICONSTANTFORCE))
 665                 return DIERR_INVALIDPARAM;
 666             tsp = peff->lpvTypeSpecificParams;
 667             This->effect.u.constant.level = (max(min(tsp->lMagnitude, 10000), -10000) / 10) * 32;
 668         } else if (type == DIEFT_RAMPFORCE) {
 669             LPCDIRAMPFORCE tsp;
 670             if (peff->cbTypeSpecificParams != sizeof(DIRAMPFORCE))
 671                 return DIERR_INVALIDPARAM;
 672             tsp = peff->lpvTypeSpecificParams;
 673             This->effect.u.ramp.start_level = (tsp->lStart / 10) * 32;
 674             This->effect.u.ramp.end_level = (tsp->lStart / 10) * 32;
 675         } else if (type == DIEFT_CONDITION) {
 676             LPCDICONDITION tsp = peff->lpvTypeSpecificParams;
 677             if (peff->cbTypeSpecificParams == sizeof(DICONDITION)) {
 678                 /* One condition block.  This needs to be rotated to direction,
 679                  * and expanded to separate x and y conditions. */
 680                 int i;
 681                 double factor[2];
 682                 factor[0] = asin((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 683                 factor[1] = acos((This->effect.direction * 3.0 * M_PI) / 0x7FFF);
 684                 for (i = 0; i < 2; ++i) {
 685                     This->effect.u.condition[i].center = (int)(factor[i] * (tsp->lOffset / 10) * 32);
 686                     This->effect.u.condition[i].right_coeff = (int)(factor[i] * (tsp->lPositiveCoefficient / 10) * 32);
 687                     This->effect.u.condition[i].left_coeff = (int)(factor[i] * (tsp->lNegativeCoefficient / 10) * 32);
 688                     This->effect.u.condition[i].right_saturation = (int)(factor[i] * (tsp->dwPositiveSaturation / 10) * 32);
 689                     This->effect.u.condition[i].left_saturation = (int)(factor[i] * (tsp->dwNegativeSaturation / 10) * 32);
 690                     This->effect.u.condition[i].deadband = (int)(factor[i] * (tsp->lDeadBand / 10) * 32);
 691                 }
 692             } else if (peff->cbTypeSpecificParams == 2 * sizeof(DICONDITION)) {
 693                 /* Two condition blocks.  Direct parameter copy. */
 694                 int i;
 695                 for (i = 0; i < 2; ++i) {
 696                     This->effect.u.condition[i].center = (tsp[i].lOffset / 10) * 32;
 697                     This->effect.u.condition[i].right_coeff = (tsp[i].lPositiveCoefficient / 10) * 32;
 698                     This->effect.u.condition[i].left_coeff = (tsp[i].lNegativeCoefficient / 10) * 32;
 699                     This->effect.u.condition[i].right_saturation = (tsp[i].dwPositiveSaturation / 10) * 32;
 700                     This->effect.u.condition[i].left_saturation = (tsp[i].dwNegativeSaturation / 10) * 32;
 701                     This->effect.u.condition[i].deadband = (tsp[i].lDeadBand / 10) * 32;
 702                 }
 703             } else {
 704                 return DIERR_INVALIDPARAM;
 705             }
 706         } else {
 707             FIXME("Custom force types are not supported\n");
 708             return DIERR_INVALIDPARAM;
 709         }
 710     }
 711
 712     if (!(dwFlags & DIEP_NODOWNLOAD))
 713         retval = LinuxInputEffectImpl_Download(iface);
 714     if (retval != DI_OK)
 715         return DI_DOWNLOADSKIPPED;
 716
 717     if (dwFlags & DIEP_NORESTART)
 718         TRACE("DIEP_NORESTART: not handled (we have no control of that).\n");
 719
 720     if (dwFlags & DIEP_START)
 721         retval = LinuxInputEffectImpl_Start(iface, 1, 0);
 722     if (retval != DI_OK)
 723         return retval;
 724
 725     return DI_OK;
 726 }
 727
 728 static HRESULT WINAPI LinuxInputEffectImpl_Stop(
 729         LPDIRECTINPUTEFFECT iface)
 730 {
 731     struct input_event event;
 732     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 733
 734     TRACE("(this=%p)\n", This);
 735
 736     event.type = EV_FF;
 737     event.code = This->effect.id;
 738     event.value = 0;
 739     /* we don't care about the success or failure of this call */
 740     write(*(This->fd), &event, sizeof(event));
 741
 742     return DI_OK;
 743 }
 744
 745 static HRESULT WINAPI LinuxInputEffectImpl_Unload(
 746         LPDIRECTINPUTEFFECT iface)
 747 {
 748     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 749     TRACE("(this=%p)\n", This);
 750
 751     /* Erase the downloaded effect */
 752     if (ioctl(*(This->fd), EVIOCRMFF, This->effect.id) == -1)
 753         return DIERR_INVALIDPARAM;
 754
 755     /* Mark the effect as deallocated */
 756     This->effect.id = -1;
 757
 758     return DI_OK;
 759 }
 760
 761 static ULONG WINAPI LinuxInputEffectImpl_Release(LPDIRECTINPUTEFFECT iface)
 762 {
 763     LinuxInputEffectImpl *This = (LinuxInputEffectImpl *)iface;
 764     ULONG ref = InterlockedDecrement(&(This->ref));
 765
 766     if (ref == 0)
 767     {
 768         LinuxInputEffectImpl_Stop(iface);
 769         LinuxInputEffectImpl_Unload(iface);
 770         list_remove(This->entry);
 771         HeapFree(GetProcessHeap(), 0, LIST_ENTRY(This->entry, effect_list_item, entry));
 772         HeapFree(GetProcessHeap(), 0, This);
 773     }
 774     return ref;
 775 }
 776
 777 /******************************************************************************
 778  *      LinuxInputEffect
 779  */
 780
 781 HRESULT linuxinput_create_effect(
 782         int* fd,
 783         REFGUID rguid,
 784         struct list *parent_list_entry,
 785         LPDIRECTINPUTEFFECT* peff)
 786 {
 787     LinuxInputEffectImpl* newEffect = HeapAlloc(GetProcessHeap(),
 788         HEAP_ZERO_MEMORY, sizeof(LinuxInputEffectImpl));
 789     DWORD type = _typeFromGUID(rguid);
 790
 791     newEffect->lpVtbl = &LinuxInputEffectVtbl;
 792     newEffect->ref = 1;
 793     newEffect->guid = *rguid;
 794     newEffect->fd = fd;
 795     newEffect->gain = 0xFFFF;
 796
 797     /* set the type.  this cannot be changed over the effect's life. */
 798     switch (type) {
 799         case DIEFT_PERIODIC:
 800             newEffect->effect.type = FF_PERIODIC;
 801             if (IsEqualGUID(rguid, &GUID_Sine)) {
 802                 newEffect->effect.u.periodic.waveform = FF_SINE;
 803             } else if (IsEqualGUID(rguid, &GUID_Triangle)) {
 804                 newEffect->effect.u.periodic.waveform = FF_TRIANGLE;
 805             } else if (IsEqualGUID(rguid, &GUID_Square)) {
 806                 newEffect->effect.u.periodic.waveform = FF_SQUARE;
 807             } else if (IsEqualGUID(rguid, &GUID_SawtoothUp)) {
 808                 newEffect->effect.u.periodic.waveform = FF_SAW_UP;
 809             } else if (IsEqualGUID(rguid, &GUID_SawtoothDown)) {
 810                 newEffect->effect.u.periodic.waveform = FF_SAW_DOWN;
 811             }
 812             break;
 813         case DIEFT_CONSTANTFORCE:
 814             newEffect->effect.type = FF_CONSTANT;
 815             break;
 816         case DIEFT_RAMPFORCE:
 817             newEffect->effect.type = FF_RAMP;
 818             break;
 819         case DIEFT_CONDITION:
 820             if (IsEqualGUID(rguid, &GUID_Spring)) {
 821                 newEffect->effect.type = FF_SPRING;
 822             } else if (IsEqualGUID(rguid, &GUID_Friction)) {
 823                 newEffect->effect.type = FF_FRICTION;
 824             } else if (IsEqualGUID(rguid, &GUID_Inertia)) {
 825                 newEffect->effect.type = FF_INERTIA;
 826             } else if (IsEqualGUID(rguid, &GUID_Damper)) {
 827                 newEffect->effect.type = FF_DAMPER;
 828             }
 829             break;
 830         case DIEFT_CUSTOMFORCE:
 831             FIXME("Custom forces are not supported.\n");
 832             HeapFree(GetProcessHeap(), 0, newEffect);
 833             return DIERR_INVALIDPARAM;
 834         default:
 835             FIXME("Unknown force type 0x%x.\n", type);
 836             HeapFree(GetProcessHeap(), 0, newEffect);
 837             return DIERR_INVALIDPARAM;
 838     }
 839
 840     /* mark as non-uploaded */
 841     newEffect->effect.id = -1;
 842
 843     newEffect->entry = parent_list_entry;
 844
 845     *peff = (LPDIRECTINPUTEFFECT)newEffect;
 846
 847     TRACE("Creating linux input system effect (%p) with guid %s\n",
 848           *peff, _dump_dinput_GUID(rguid));
 849
 850     return DI_OK;
 851 }
 852
 853 HRESULT linuxinput_get_info_A(
 854         int fd,
 855         REFGUID rguid,
 856         LPDIEFFECTINFOA info)
 857 {
 858     DWORD type = _typeFromGUID(rguid);
 859
 860     TRACE("(%d, %s, %p) type=%d\n", fd, _dump_dinput_GUID(rguid), info, type);
 861
 862     if (!info) return E_POINTER;
 863
 864     if (info->dwSize != sizeof(DIEFFECTINFOA)) return DIERR_INVALIDPARAM;
 865
 866     info->guid = *rguid;
 867
 868     info->dwEffType = type;
 869     /* the event device API does not support querying for all these things
 870      * therefore we assume that we have support for them
 871      * that's not as dangerous as it sounds, since drivers are allowed to
 872      * ignore parameters they claim to support anyway */
 873     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 874                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 875                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 876
 877     /* again, assume we have support for everything */
 878     info->dwStaticParams = DIEP_ALLPARAMS;
 879     info->dwDynamicParams = info->dwStaticParams;
 880
 881     /* yes, this is windows behavior (print the GUID_Name for name) */
 882     strcpy(info->tszName, _dump_dinput_GUID(rguid));
 883
 884     return DI_OK;
 885 }
 886
 887 HRESULT linuxinput_get_info_W(
 888         int fd,
 889         REFGUID rguid,
 890         LPDIEFFECTINFOW info)
 891 {
 892     DWORD type = _typeFromGUID(rguid);
 893
 894     TRACE("(%d, %s, %p) type=%d\n", fd, _dump_dinput_GUID(rguid), info, type);
 895
 896     if (!info) return E_POINTER;
 897
 898     if (info->dwSize != sizeof(DIEFFECTINFOW)) return DIERR_INVALIDPARAM;
 899
 900     info->guid = *rguid;
 901
 902     info->dwEffType = type;
 903     /* the event device API does not support querying for all these things
 904      * therefore we assume that we have support for them
 905      * that's not as dangerous as it sounds, since drivers are allowed to
 906      * ignore parameters they claim to support anyway */
 907     info->dwEffType |= DIEFT_DEADBAND | DIEFT_FFATTACK | DIEFT_FFFADE
 908                     | DIEFT_POSNEGCOEFFICIENTS | DIEFT_POSNEGSATURATION
 909                     | DIEFT_SATURATION | DIEFT_STARTDELAY;
 910
 911     /* again, assume we have support for everything */
 912     info->dwStaticParams = DIEP_ALLPARAMS;
 913     info->dwDynamicParams = info->dwStaticParams;
 914
 915     /* yes, this is windows behavior (print the GUID_Name for name) */
 916     MultiByteToWideChar(CP_ACP, 0, _dump_dinput_GUID(rguid), -1,
 917                         info->tszName, MAX_PATH);
 918
 919     return DI_OK;
 920 }
 921
 922 static const IDirectInputEffectVtbl LinuxInputEffectVtbl = {
 923     LinuxInputEffectImpl_QueryInterface,
 924     LinuxInputEffectImpl_AddRef,
 925     LinuxInputEffectImpl_Release,
 926     LinuxInputEffectImpl_Initialize,
 927     LinuxInputEffectImpl_GetEffectGuid,
 928     LinuxInputEffectImpl_GetParameters,
 929     LinuxInputEffectImpl_SetParameters,
 930     LinuxInputEffectImpl_Start,
 931     LinuxInputEffectImpl_Stop,
 932     LinuxInputEffectImpl_GetEffectStatus,
 933     LinuxInputEffectImpl_Download,
 934     LinuxInputEffectImpl_Unload,
 935     LinuxInputEffectImpl_Escape
 936 };
 937
 938 #endif /* HAVE_STRUCT_FF_EFFECT_DIRECTION */