OpenAL32/alAuxEffectSlot.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  *  Boston, MA  02111-1307, USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include <stdlib.h>
  22
  23 #include "config.h"
  24
  25 #include "AL/al.h"
  26 #include "AL/alc.h"
  27
  28 #include "alMain.h"
  29 #include "alAuxEffectSlot.h"
  30 #include "alThunk.h"
  31 #include "alError.h"
  32
  33 static ALeffectslot *g_AuxiliaryEffectSlotList;
  34 static ALuint        g_AuxiliaryEffectSlotCount;
  35
  36
  37 AL_API ALvoid AL_APIENTRY alGenAuxiliaryEffectSlots(ALsizei n, ALuint *effectslots)
  38 {
  39     ALCcontext *Context;
  40     ALsizei i;
  41
  42     Context = alcGetCurrentContext();
  43     SuspendContext(Context);
  44
  45     if (n > 0)
  46     {
  47         /* NOTE: We only support one slot currently */
  48         if(n == 1 && g_AuxiliaryEffectSlotCount == 0)
  49         {
  50             // Check that enough memory has been allocted in the 'sources' array for n Sources
  51             if (!IsBadWritePtr((void*)effectslots, n * sizeof(ALuint)))
  52             {
  53                 ALeffectslot **list = &g_AuxiliaryEffectSlotList;
  54                 while(*list)
  55                     list = &(*list)->next;
  56
  57                 i = 0;
  58                 while(i < n)
  59                 {
  60                     *list = calloc(1, sizeof(ALeffectslot));
  61                     if(!(*list))
  62                     {
  63                         // We must have run out or memory
  64                         alDeleteAuxiliaryEffectSlots(i, effectslots);
  65                         alSetError(AL_OUT_OF_MEMORY);
  66                         break;
  67                     }
  68
  69                     (*list)->Gain = 1.0;
  70                     (*list)->AuxSendAuto = AL_TRUE;
  71
  72                     effectslots[i] = (ALuint)ALTHUNK_ADDENTRY(*list);
  73                     (*list)->effectslot = effectslots[i];
  74
  75                     g_AuxiliaryEffectSlotCount++;
  76                     i++;
  77                 }
  78             }
  79         }
  80         else
  81             alSetError(AL_INVALID_OPERATION);
  82     }
  83
  84     ProcessContext(Context);
  85 }
  86
  87 AL_API ALvoid AL_APIENTRY alDeleteAuxiliaryEffectSlots(ALsizei n, ALuint *effectslots)
  88 {
  89     ALCcontext *Context;
  90     ALeffectslot *ALAuxiliaryEffectSlot;
  91     ALsizei i;
  92
  93     Context = alcGetCurrentContext();
  94     SuspendContext(Context);
  95
  96     if (n >= 0)
  97     {
  98         // Check that all effectslots are valid
  99         for (i = 0; i < n; i++)
 100         {
 101             if (!alIsAuxiliaryEffectSlot(effectslots[i]))
 102             {
 103                 alSetError(AL_INVALID_NAME);
 104                 break;
 105             }
 106         }
 107
 108         if (i == n)
 109         {
 110             // All effectslots are valid
 111             for (i = 0; i < n; i++)
 112             {
 113                 // Recheck that the effectslot is valid, because there could be duplicated names
 114                 if (alIsAuxiliaryEffectSlot(effectslots[i]))
 115                 {
 116                     ALeffectslot **list;
 117
 118                     ALAuxiliaryEffectSlot = ((ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslots[i]));
 119
 120                     // Remove Source from list of Sources
 121                     list = &g_AuxiliaryEffectSlotList;
 122                     while(*list && *list != ALAuxiliaryEffectSlot)
 123                          list = &(*list)->next;
 124
 125                     if(*list)
 126                         *list = (*list)->next;
 127                     ALTHUNK_REMOVEENTRY(ALAuxiliaryEffectSlot->effectslot);
 128
 129                     memset(ALAuxiliaryEffectSlot, 0, sizeof(ALeffectslot));
 130                     free(ALAuxiliaryEffectSlot);
 131
 132                     g_AuxiliaryEffectSlotCount--;
 133                 }
 134             }
 135         }
 136     }
 137     else
 138         alSetError(AL_INVALID_VALUE);
 139
 140     ProcessContext(Context);
 141 }
 142
 143 AL_API ALboolean AL_APIENTRY alIsAuxiliaryEffectSlot(ALuint effectslot)
 144 {
 145     ALCcontext *Context;
 146     ALeffectslot **list;
 147
 148     Context = alcGetCurrentContext();
 149     SuspendContext(Context);
 150
 151     list = &g_AuxiliaryEffectSlotList;
 152     while(*list && (*list)->effectslot != effectslot)
 153         list = &(*list)->next;
 154
 155     ProcessContext(Context);
 156
 157     return (*list ? AL_TRUE : AL_FALSE);
 158 }
 159
 160 AL_API ALvoid AL_APIENTRY alAuxiliaryEffectSloti(ALuint effectslot, ALenum param, ALint iValue)
 161 {
 162     ALCcontext *Context;
 163
 164     Context = alcGetCurrentContext();
 165     SuspendContext(Context);
 166
 167     if (alIsAuxiliaryEffectSlot(effectslot))
 168     {
 169         ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
 170
 171         switch(param)
 172         {
 173         case AL_EFFECTSLOT_EFFECT:
 174             if(alIsEffect(iValue))
 175             {
 176                 ALeffect *effect = (ALeffect*)ALTHUNK_LOOKUPENTRY(iValue);
 177                 if(!effect)
 178                 {
 179                     ALEffectSlot->effect.type = AL_EFFECT_NULL;
 180                     ALEffectSlot->effect.effect = 0;
 181                 }
 182                 else
 183                     memcpy(&ALEffectSlot->effect, effect, sizeof(*effect));
 184             }
 185             else
 186                 alSetError(AL_INVALID_VALUE);
 187             break;
 188
 189         case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
 190             if(iValue == AL_TRUE || iValue == AL_FALSE)
 191                 ALEffectSlot->AuxSendAuto = iValue;
 192             else
 193                 alSetError(AL_INVALID_VALUE);
 194             break;
 195
 196         default:
 197             alSetError(AL_INVALID_ENUM);
 198             break;
 199         }
 200     }
 201     else
 202         alSetError(AL_INVALID_NAME);
 203
 204     ProcessContext(Context);
 205 }
 206
 207 AL_API ALvoid AL_APIENTRY alAuxiliaryEffectSlotiv(ALuint effectslot, ALenum param, ALint *piValues)
 208 {
 209     ALCcontext *Context;
 210
 211     Context = alcGetCurrentContext();
 212     SuspendContext(Context);
 213
 214     if (alIsAuxiliaryEffectSlot(effectslot))
 215     {
 216         switch(param)
 217         {
 218         case AL_EFFECTSLOT_EFFECT:
 219         case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
 220             alAuxiliaryEffectSloti(effectslot, param, piValues[0]);
 221             break;
 222
 223         default:
 224             alSetError(AL_INVALID_ENUM);
 225             break;
 226         }
 227     }
 228     else
 229         alSetError(AL_INVALID_NAME);
 230
 231     ProcessContext(Context);
 232 }
 233
 234 AL_API ALvoid AL_APIENTRY alAuxiliaryEffectSlotf(ALuint effectslot, ALenum param, ALfloat flValue)
 235 {
 236     ALCcontext *Context;
 237
 238     (void)flValue;
 239
 240     Context = alcGetCurrentContext();
 241     SuspendContext(Context);
 242
 243     if (alIsAuxiliaryEffectSlot(effectslot))
 244     {
 245         ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
 246
 247         switch(param)
 248         {
 249         case AL_EFFECTSLOT_GAIN:
 250             if(flValue >= 0.0f && flValue <= 1.0f)
 251                 ALEffectSlot->Gain = flValue;
 252             else
 253                 alSetError(AL_INVALID_VALUE);
 254             break;
 255
 256         default:
 257             alSetError(AL_INVALID_ENUM);
 258             break;
 259         }
 260     }
 261     else
 262         alSetError(AL_INVALID_NAME);
 263
 264     ProcessContext(Context);
 265 }
 266
 267 AL_API ALvoid AL_APIENTRY alAuxiliaryEffectSlotfv(ALuint effectslot, ALenum param, ALfloat *pflValues)
 268 {
 269     ALCcontext *Context;
 270
 271     Context = alcGetCurrentContext();
 272     SuspendContext(Context);
 273
 274     if (alIsAuxiliaryEffectSlot(effectslot))
 275     {
 276         switch(param)
 277         {
 278         case AL_EFFECTSLOT_GAIN:
 279             alAuxiliaryEffectSlotf(effectslot, param, pflValues[0]);
 280             break;
 281
 282         default:
 283             alSetError(AL_INVALID_ENUM);
 284             break;
 285         }
 286     }
 287     else
 288         alSetError(AL_INVALID_NAME);
 289
 290     ProcessContext(Context);
 291 }
 292
 293 AL_API ALvoid AL_APIENTRY alGetAuxiliaryEffectSloti(ALuint effectslot, ALenum param, ALint *piValue)
 294 {
 295     ALCcontext *Context;
 296
 297     Context = alcGetCurrentContext();
 298     SuspendContext(Context);
 299
 300     if (alIsAuxiliaryEffectSlot(effectslot))
 301     {
 302         ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
 303
 304         switch(param)
 305         {
 306         case AL_EFFECTSLOT_EFFECT:
 307             *piValue = ALEffectSlot->effect.effect;
 308             break;
 309
 310         case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
 311             *piValue = ALEffectSlot->AuxSendAuto;
 312             break;
 313
 314         default:
 315             alSetError(AL_INVALID_ENUM);
 316             break;
 317         }
 318     }
 319     else
 320         alSetError(AL_INVALID_NAME);
 321
 322     ProcessContext(Context);
 323 }
 324
 325 AL_API ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotiv(ALuint effectslot, ALenum param, ALint *piValues)
 326 {
 327     ALCcontext *Context;
 328
 329     Context = alcGetCurrentContext();
 330     SuspendContext(Context);
 331
 332     if (alIsAuxiliaryEffectSlot(effectslot))
 333     {
 334         switch(param)
 335         {
 336         case AL_EFFECTSLOT_EFFECT:
 337         case AL_EFFECTSLOT_AUXILIARY_SEND_AUTO:
 338             alGetAuxiliaryEffectSloti(effectslot, param, piValues);
 339             break;
 340
 341         default:
 342             alSetError(AL_INVALID_ENUM);
 343             break;
 344         }
 345     }
 346     else
 347         alSetError(AL_INVALID_NAME);
 348
 349     ProcessContext(Context);
 350 }
 351
 352 AL_API ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotf(ALuint effectslot, ALenum param, ALfloat *pflValue)
 353 {
 354     ALCcontext *Context;
 355
 356     Context = alcGetCurrentContext();
 357     SuspendContext(Context);
 358
 359     if (alIsAuxiliaryEffectSlot(effectslot))
 360     {
 361         ALeffectslot *ALEffectSlot = (ALeffectslot*)ALTHUNK_LOOKUPENTRY(effectslot);
 362
 363         switch(param)
 364         {
 365         case AL_EFFECTSLOT_GAIN:
 366             *pflValue = ALEffectSlot->Gain;
 367             break;
 368
 369         default:
 370             alSetError(AL_INVALID_ENUM);
 371             break;
 372         }
 373     }
 374     else
 375         alSetError(AL_INVALID_NAME);
 376
 377     ProcessContext(Context);
 378 }
 379
 380 AL_API ALvoid AL_APIENTRY alGetAuxiliaryEffectSlotfv(ALuint effectslot, ALenum param, ALfloat *pflValues)
 381 {
 382     ALCcontext *Context;
 383
 384     Context = alcGetCurrentContext();
 385     SuspendContext(Context);
 386
 387     if (alIsAuxiliaryEffectSlot(effectslot))
 388     {
 389         switch(param)
 390         {
 391         case AL_EFFECTSLOT_GAIN:
 392             alGetAuxiliaryEffectSlotf(effectslot, param, pflValues);
 393             break;
 394
 395         default:
 396             alSetError(AL_INVALID_ENUM);
 397             break;
 398         }
 399     }
 400     else
 401         alSetError(AL_INVALID_NAME);
 402
 403     ProcessContext(Context);
 404 }
 405
 406
 407 ALvoid ReleaseALAuxiliaryEffectSlots(ALvoid)
 408 {
 409 #ifdef _DEBUG
 410     if(g_AuxiliaryEffectSlotCount > 0)
 411         AL_PRINT("exit() %d AuxiliaryEffectSlot(s) NOT deleted\n", g_AuxiliaryEffectSlotCount);
 412 #endif
 413
 414     while(g_AuxiliaryEffectSlotList)
 415     {
 416         ALeffectslot *temp = g_AuxiliaryEffectSlotList;
 417         g_AuxiliaryEffectSlotList = g_AuxiliaryEffectSlotList->next;
 418
 419         // Release effectslot structure
 420         memset(temp, 0, sizeof(ALeffectslot));
 421         free(temp);
 422     }
 423     g_AuxiliaryEffectSlotCount = 0;
 424 }