Alc/ALu.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 #define _CRT_SECURE_NO_DEPRECATE // get rid of sprintf security warnings on VS2005
  22
  23 #include "config.h"
  24
  25 #include <math.h>
  26 #include "alMain.h"
  27 #include "AL/al.h"
  28 #include "AL/alc.h"
  29 #include "alSource.h"
  30 #include "alBuffer.h"
  31 #include "alThunk.h"
  32 #include "alListener.h"
  33 #include "alAuxEffectSlot.h"
  34 #include "bs2b.h"
  35
  36 #if defined(HAVE_STDINT_H)
  37 #include <stdint.h>
  38 typedef int64_t ALint64;
  39 #elif defined(HAVE___INT64)
  40 typedef __int64 ALint64;
  41 #elif (SIZEOF_LONG == 8)
  42 typedef long ALint64;
  43 #elif (SIZEOF_LONG_LONG == 8)
  44 typedef long long ALint64;
  45 #endif
  46
  47 #ifdef HAVE_SQRTF
  48 #define aluSqrt(x) ((ALfloat)sqrtf((float)(x)))
  49 #else
  50 #define aluSqrt(x) ((ALfloat)sqrt((double)(x)))
  51 #endif
  52
  53 #ifdef HAVE_ACOSF
  54 #define aluAcos(x) ((ALfloat)acosf((float)(x)))
  55 #else
  56 #define aluAcos(x) ((ALfloat)acos((double)(x)))
  57 #endif
  58
  59 // fixes for mingw32.
  60 #if defined(max) && !defined(__max)
  61 #define __max max
  62 #endif
  63 #if defined(min) && !defined(__min)
  64 #define __min min
  65 #endif
  66
  67 #define BUFFERSIZE 48000
  68 #define FRACTIONBITS 14
  69 #define FRACTIONMASK ((1L<<FRACTIONBITS)-1)
  70 #define MAX_PITCH 4
  71
  72 enum {
  73     FRONT_LEFT = 0,
  74     FRONT_RIGHT,
  75     SIDE_LEFT,
  76     SIDE_RIGHT,
  77     BACK_LEFT,
  78     BACK_RIGHT,
  79     CENTER,
  80     LFE,
  81
  82     OUTPUTCHANNELS
  83 };
  84
  85 /* NOTE: The AL_FORMAT_REAR* enums aren't handled here be cause they're
  86  *       converted to AL_FORMAT_QUAD* when loaded */
  87 __inline ALuint aluBytesFromFormat(ALenum format)
  88 {
  89     switch(format)
  90     {
  91         case AL_FORMAT_MONO8:
  92         case AL_FORMAT_STEREO8:
  93         case AL_FORMAT_QUAD8_LOKI:
  94         case AL_FORMAT_QUAD8:
  95         case AL_FORMAT_51CHN8:
  96         case AL_FORMAT_61CHN8:
  97         case AL_FORMAT_71CHN8:
  98             return 1;
  99
 100         case AL_FORMAT_MONO16:
 101         case AL_FORMAT_STEREO16:
 102         case AL_FORMAT_QUAD16_LOKI:
 103         case AL_FORMAT_QUAD16:
 104         case AL_FORMAT_51CHN16:
 105         case AL_FORMAT_61CHN16:
 106         case AL_FORMAT_71CHN16:
 107             return 2;
 108
 109         case AL_FORMAT_MONO_FLOAT32:
 110         case AL_FORMAT_STEREO_FLOAT32:
 111         case AL_FORMAT_QUAD32:
 112         case AL_FORMAT_51CHN32:
 113         case AL_FORMAT_61CHN32:
 114         case AL_FORMAT_71CHN32:
 115             return 4;
 116
 117         default:
 118             return 0;
 119     }
 120 }
 121
 122 __inline ALuint aluChannelsFromFormat(ALenum format)
 123 {
 124     switch(format)
 125     {
 126         case AL_FORMAT_MONO8:
 127         case AL_FORMAT_MONO16:
 128         case AL_FORMAT_MONO_FLOAT32:
 129             return 1;
 130
 131         case AL_FORMAT_STEREO8:
 132         case AL_FORMAT_STEREO16:
 133         case AL_FORMAT_STEREO_FLOAT32:
 134             return 2;
 135
 136         case AL_FORMAT_QUAD8_LOKI:
 137         case AL_FORMAT_QUAD16_LOKI:
 138         case AL_FORMAT_QUAD8:
 139         case AL_FORMAT_QUAD16:
 140         case AL_FORMAT_QUAD32:
 141             return 4;
 142
 143         case AL_FORMAT_51CHN8:
 144         case AL_FORMAT_51CHN16:
 145         case AL_FORMAT_51CHN32:
 146             return 6;
 147
 148         case AL_FORMAT_61CHN8:
 149         case AL_FORMAT_61CHN16:
 150         case AL_FORMAT_61CHN32:
 151             return 7;
 152
 153         case AL_FORMAT_71CHN8:
 154         case AL_FORMAT_71CHN16:
 155         case AL_FORMAT_71CHN32:
 156             return 8;
 157
 158         default:
 159             return 0;
 160     }
 161 }
 162
 163 static __inline ALint aluF2L(ALfloat Value)
 164 {
 165 #if 0
 166     if(sizeof(ALint) == 4 && sizeof(double) == 8)
 167     {
 168         double temp;
 169         temp = Value + (((65536.0*65536.0*16.0)+(65536.0*65536.0*8.0))*65536.0);
 170         return *((ALint*)&temp);
 171     }
 172 #endif
 173     return (ALint)Value;
 174 }
 175
 176 static __inline ALshort aluF2S(ALfloat Value)
 177 {
 178     ALint i;
 179
 180     i = aluF2L(Value);
 181     i = __min( 32767, i);
 182     i = __max(-32768, i);
 183     return ((ALshort)i);
 184 }
 185
 186 static __inline ALvoid aluCrossproduct(ALfloat *inVector1,ALfloat *inVector2,ALfloat *outVector)
 187 {
 188     outVector[0] = inVector1[1]*inVector2[2] - inVector1[2]*inVector2[1];
 189     outVector[1] = inVector1[2]*inVector2[0] - inVector1[0]*inVector2[2];
 190     outVector[2] = inVector1[0]*inVector2[1] - inVector1[1]*inVector2[0];
 191 }
 192
 193 static __inline ALfloat aluDotproduct(ALfloat *inVector1,ALfloat *inVector2)
 194 {
 195     return inVector1[0]*inVector2[0] + inVector1[1]*inVector2[1] +
 196            inVector1[2]*inVector2[2];
 197 }
 198
 199 static __inline ALvoid aluNormalize(ALfloat *inVector)
 200 {
 201     ALfloat length, inverse_length;
 202
 203     length = (ALfloat)aluSqrt(aluDotproduct(inVector, inVector));
 204     if(length != 0)
 205     {
 206         inverse_length = 1.0f/length;
 207         inVector[0] *= inverse_length;
 208         inVector[1] *= inverse_length;
 209         inVector[2] *= inverse_length;
 210     }
 211 }
 212
 213 static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat matrix[3][3])
 214 {
 215     ALfloat result[3];
 216
 217     result[0] = vector[0]*matrix[0][0] + vector[1]*matrix[1][0] + vector[2]*matrix[2][0];
 218     result[1] = vector[0]*matrix[0][1] + vector[1]*matrix[1][1] + vector[2]*matrix[2][1];
 219     result[2] = vector[0]*matrix[0][2] + vector[1]*matrix[1][2] + vector[2]*matrix[2][2];
 220     memcpy(vector, result, sizeof(result));
 221 }
 222
 223 static __inline ALfloat aluComputeDrySample(ALsource *source, ALfloat DryGainHF, ALfloat sample)
 224 {
 225     if(DryGainHF < 1.0f)
 226     {
 227         if(DryGainHF > 0.0f)
 228         {
 229             sample *= DryGainHF;
 230             sample += source->LastDrySample * (1.0f-DryGainHF);
 231         }
 232         else
 233             sample = 0.0f;
 234     }
 235
 236     source->LastDrySample = sample;
 237     return sample;
 238 }
 239
 240 static __inline ALfloat aluComputeWetSample(ALsource *source, ALfloat WetGainHF, ALfloat sample)
 241 {
 242     if(WetGainHF < 1.0f)
 243     {
 244         if(WetGainHF > 0.0f)
 245         {
 246             sample *= WetGainHF;
 247             sample += source->LastWetSample * (1.0f-WetGainHF);
 248         }
 249         else
 250             sample = 0.0f;
 251     }
 252
 253     source->LastWetSample = sample;
 254     return sample;
 255 }
 256
 257 static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource,
 258                                ALenum isMono, ALenum OutputFormat,
 259                                ALfloat *drysend, ALfloat *wetsend,
 260                                ALfloat *pitch, ALfloat *drygainhf,
 261                                ALfloat *wetgainhf)
 262 {
 263     ALfloat InnerAngle,OuterAngle,Angle,Distance,DryMix,WetMix=0.0f;
 264     ALfloat Direction[3],Position[3],SourceToListener[3];
 265     ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF;
 266     ALfloat ConeVolume,SourceVolume,PanningFB,PanningLR,ListenerGain;
 267     ALfloat U[3],V[3],N[3];
 268     ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound, flMaxVelocity;
 269     ALfloat Matrix[3][3];
 270     ALfloat flAttenuation;
 271     ALfloat RoomAttenuation;
 272     ALfloat MetersPerUnit;
 273     ALfloat RoomRolloff;
 274     ALfloat DryGainHF = 1.0f;
 275     ALfloat WetGainHF = 1.0f;
 276
 277     //Get context properties
 278     DopplerFactor   = ALContext->DopplerFactor;
 279     DopplerVelocity = ALContext->DopplerVelocity;
 280     flSpeedOfSound  = ALContext->flSpeedOfSound;
 281
 282     //Get listener properties
 283     ListenerGain = ALContext->Listener.Gain;
 284     MetersPerUnit = ALContext->Listener.MetersPerUnit;
 285
 286     //Get source properties
 287     SourceVolume = ALSource->flGain;
 288     memcpy(Position,  ALSource->vPosition,    sizeof(ALSource->vPosition));
 289     memcpy(Direction, ALSource->vOrientation, sizeof(ALSource->vOrientation));
 290     MinVolume    = ALSource->flMinGain;
 291     MaxVolume    = ALSource->flMaxGain;
 292     MinDist      = ALSource->flRefDistance;
 293     MaxDist      = ALSource->flMaxDistance;
 294     Rolloff      = ALSource->flRollOffFactor;
 295     InnerAngle   = ALSource->flInnerAngle;
 296     OuterAngle   = ALSource->flOuterAngle;
 297     OuterGainHF  = ALSource->OuterGainHF;
 298     RoomRolloff  = ALSource->RoomRolloffFactor;
 299
 300     //Only apply 3D calculations for mono buffers
 301     if(isMono != AL_FALSE)
 302     {
 303         //1. Translate Listener to origin (convert to head relative)
 304         if(ALSource->bHeadRelative==AL_FALSE)
 305         {
 306             Position[0] -= ALContext->Listener.Position[0];
 307             Position[1] -= ALContext->Listener.Position[1];
 308             Position[2] -= ALContext->Listener.Position[2];
 309         }
 310
 311         //2. Calculate distance attenuation
 312         Distance = aluSqrt(aluDotproduct(Position, Position));
 313
 314         flAttenuation = 1.0f;
 315         RoomAttenuation = 1.0f;
 316         switch (ALContext->DistanceModel)
 317         {
 318             case AL_INVERSE_DISTANCE_CLAMPED:
 319                 Distance=__max(Distance,MinDist);
 320                 Distance=__min(Distance,MaxDist);
 321                 if (MaxDist < MinDist)
 322                     break;
 323                 //fall-through
 324             case AL_INVERSE_DISTANCE:
 325                 if (MinDist > 0.0f)
 326                 {
 327                     if ((MinDist + (Rolloff * (Distance - MinDist))) > 0.0f)
 328                         flAttenuation = MinDist / (MinDist + (Rolloff * (Distance - MinDist)));
 329                     if ((MinDist + (RoomRolloff * (Distance - MinDist))) > 0.0f)
 330                         RoomAttenuation = MinDist / (MinDist + (RoomRolloff * (Distance - MinDist)));
 331                 }
 332                 break;
 333
 334             case AL_LINEAR_DISTANCE_CLAMPED:
 335                 Distance=__max(Distance,MinDist);
 336                 Distance=__min(Distance,MaxDist);
 337                 if (MaxDist < MinDist)
 338                     break;
 339                 //fall-through
 340             case AL_LINEAR_DISTANCE:
 341                 Distance=__min(Distance,MaxDist);
 342                 if (MaxDist != MinDist)
 343                 {
 344                     flAttenuation = 1.0f - (Rolloff*(Distance-MinDist)/(MaxDist - MinDist));
 345                     RoomAttenuation = 1.0f - (RoomRolloff*(Distance-MinDist)/(MaxDist - MinDist));
 346                 }
 347                 break;
 348
 349             case AL_EXPONENT_DISTANCE_CLAMPED:
 350                 Distance=__max(Distance,MinDist);
 351                 Distance=__min(Distance,MaxDist);
 352                 if (MaxDist < MinDist)
 353                     break;
 354                 //fall-through
 355             case AL_EXPONENT_DISTANCE:
 356                 if ((Distance > 0.0f) && (MinDist > 0.0f))
 357                 {
 358                     flAttenuation = (ALfloat)pow(Distance/MinDist, -Rolloff);
 359                     RoomAttenuation = (ALfloat)pow(Distance/MinDist, -RoomRolloff);
 360                 }
 361                 break;
 362
 363             case AL_NONE:
 364             default:
 365                 flAttenuation = 1.0f;
 366                 RoomAttenuation = 1.0f;
 367                 break;
 368         }
 369
 370         // Source Gain + Attenuation and clamp to Min/Max Gain
 371         DryMix = SourceVolume * flAttenuation;
 372         DryMix = __min(DryMix,MaxVolume);
 373         DryMix = __max(DryMix,MinVolume);
 374         if(ALSource->Send[0].Slot)
 375         {
 376             WetMix = SourceVolume * ((ALSource->WetGainAuto &&
 377                                       ALSource->Send[0].Slot->AuxSendAuto) ?
 378                                      RoomAttenuation : 1.0f);
 379             WetMix = __min(WetMix,MaxVolume);
 380             WetMix = __max(WetMix,MinVolume);
 381         }
 382
 383         //3. Apply directional soundcones
 384         SourceToListener[0] = -Position[0];
 385         SourceToListener[1] = -Position[1];
 386         SourceToListener[2] = -Position[2];
 387         aluNormalize(Direction);
 388         aluNormalize(SourceToListener);
 389         Angle = aluAcos(aluDotproduct(Direction,SourceToListener)) * 180.0f /
 390                 3.141592654f;
 391         if(Angle >= InnerAngle && Angle <= OuterAngle)
 392         {
 393             ALfloat scale = (Angle-InnerAngle) / (OuterAngle-InnerAngle);
 394             ConeVolume = (1.0f+(ALSource->flOuterGain-1.0f)*scale);
 395             if(ALSource->WetGainAuto)
 396                 WetMix *= ConeVolume;
 397             if(ALSource->DryGainHFAuto)
 398                 DryGainHF *= (1.0f+(OuterGainHF-1.0f)*scale);
 399             if(ALSource->WetGainHFAuto)
 400                 WetGainHF *= (1.0f+(OuterGainHF-1.0f)*scale);
 401         }
 402         else if(Angle > OuterAngle)
 403         {
 404             ConeVolume = (1.0f+(ALSource->flOuterGain-1.0f));
 405             if(ALSource->WetGainAuto)
 406                 WetMix *= ConeVolume;
 407             if(ALSource->DryGainHFAuto)
 408                 DryGainHF *= (1.0f+(OuterGainHF-1.0f));
 409             if(ALSource->WetGainHFAuto)
 410                 WetGainHF *= (1.0f+(OuterGainHF-1.0f));
 411         }
 412         else
 413             ConeVolume = 1.0f;
 414
 415         //4. Calculate Velocity
 416         if(DopplerFactor != 0.0f)
 417         {
 418             ALfloat flVSS, flVLS;
 419
 420             flVLS = aluDotproduct(ALContext->Listener.Velocity,
 421                                   SourceToListener);
 422             flVSS = aluDotproduct(ALSource->vVelocity, SourceToListener);
 423
 424             flMaxVelocity = (DopplerVelocity * flSpeedOfSound) / DopplerFactor;
 425
 426             if (flVSS >= flMaxVelocity)
 427                 flVSS = (flMaxVelocity - 1.0f);
 428             else if (flVSS <= -flMaxVelocity)
 429                 flVSS = -flMaxVelocity + 1.0f;
 430
 431             if (flVLS >= flMaxVelocity)
 432                 flVLS = (flMaxVelocity - 1.0f);
 433             else if (flVLS <= -flMaxVelocity)
 434                 flVLS = -flMaxVelocity + 1.0f;
 435
 436             pitch[0] = ALSource->flPitch *
 437                        ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVLS)) /
 438                        ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVSS));
 439         }
 440         else
 441             pitch[0] = ALSource->flPitch;
 442
 443         //5. Align coordinate system axes
 444         aluCrossproduct(ALContext->Listener.Forward, ALContext->Listener.Up, U); // Right-vector
 445         aluNormalize(U);  // Normalized Right-vector
 446         memcpy(V, ALContext->Listener.Up, sizeof(V));   // Up-vector
 447         aluNormalize(V);  // Normalized Up-vector
 448         memcpy(N, ALContext->Listener.Forward, sizeof(N));  // At-vector
 449         aluNormalize(N);  // Normalized At-vector
 450         Matrix[0][0] = U[0]; Matrix[0][1] = V[0]; Matrix[0][2] = -N[0];
 451         Matrix[1][0] = U[1]; Matrix[1][1] = V[1]; Matrix[1][2] = -N[1];
 452         Matrix[2][0] = U[2]; Matrix[2][1] = V[2]; Matrix[2][2] = -N[2];
 453         aluMatrixVector(Position, Matrix);
 454
 455         //6. Apply filter gains and filters
 456         switch(ALSource->DirectFilter.filter)
 457         {
 458             case AL_FILTER_LOWPASS:
 459                 DryMix *= ALSource->DirectFilter.Gain;
 460                 DryGainHF *= ALSource->DirectFilter.GainHF;
 461                 break;
 462         }
 463
 464         switch(ALSource->Send[0].WetFilter.filter)
 465         {
 466             case AL_FILTER_LOWPASS:
 467                 WetMix *= ALSource->Send[0].WetFilter.Gain;
 468                 WetGainHF *= ALSource->Send[0].WetFilter.GainHF;
 469                 break;
 470         }
 471
 472         if(ALSource->AirAbsorptionFactor > 0.0f)
 473             DryGainHF *= pow(ALSource->AirAbsorptionFactor * AIRABSORBGAINHF,
 474                              Distance * MetersPerUnit);
 475
 476         //7. Convert normalized position into pannings, then into channel volumes
 477         aluNormalize(Position);
 478         switch(aluChannelsFromFormat(OutputFormat))
 479         {
 480             case 1:
 481                 drysend[FRONT_LEFT]  = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f); //Direct
 482                 drysend[FRONT_RIGHT] = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f); //Direct
 483                 if(ALSource->Send[0].Slot)
 484                 {
 485                     WetMix *= ALSource->Send[0].Slot->Gain;
 486                     wetsend[FRONT_LEFT]  = ListenerGain * WetMix * aluSqrt(1.0f); //Room
 487                     wetsend[FRONT_RIGHT] = ListenerGain * WetMix * aluSqrt(1.0f); //Room
 488                 }
 489                 else
 490                 {
 491                     wetsend[FRONT_LEFT]  = 0.0f;
 492                     wetsend[FRONT_RIGHT] = 0.0f;
 493                     WetGainHF = 1.0f;
 494                 }
 495                 break;
 496             case 2:
 497                 PanningLR = 0.5f + 0.5f*Position[0];
 498                 drysend[FRONT_LEFT]  = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f-PanningLR); //L Direct
 499                 drysend[FRONT_RIGHT] = ConeVolume * ListenerGain * DryMix * aluSqrt(     PanningLR); //R Direct
 500                 if(ALSource->Send[0].Slot)
 501                 {
 502                     WetMix *= ALSource->Send[0].Slot->Gain;
 503                     wetsend[FRONT_LEFT]  = ListenerGain * WetMix * aluSqrt(1.0f-PanningLR); //L Room
 504                     wetsend[FRONT_RIGHT] = ListenerGain * WetMix * aluSqrt(     PanningLR); //R Room
 505                 }
 506                 else
 507                 {
 508                     wetsend[FRONT_LEFT]  = 0.0f;
 509                     wetsend[FRONT_RIGHT] = 0.0f;
 510                     WetGainHF = 1.0f;
 511                 }
 512                 break;
 513             case 4:
 514             /* TODO: Add center/lfe channel in spatial calculations? */
 515             case 6:
 516                 // Apply a scalar so each individual speaker has more weight
 517                 PanningLR = 0.5f + (0.5f*Position[0]*1.41421356f);
 518                 PanningLR = __min(1.0f, PanningLR);
 519                 PanningLR = __max(0.0f, PanningLR);
 520                 PanningFB = 0.5f + (0.5f*Position[2]*1.41421356f);
 521                 PanningFB = __min(1.0f, PanningFB);
 522                 PanningFB = __max(0.0f, PanningFB);
 523                 drysend[FRONT_LEFT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 524                 drysend[FRONT_RIGHT] = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 525                 drysend[BACK_LEFT]   = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 526                 drysend[BACK_RIGHT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(     PanningFB));
 527                 if(ALSource->Send[0].Slot)
 528                 {
 529                     WetMix *= ALSource->Send[0].Slot->Gain;
 530                     wetsend[FRONT_LEFT]  = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 531                     wetsend[FRONT_RIGHT] = ListenerGain * WetMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 532                     wetsend[BACK_LEFT]   = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 533                     wetsend[BACK_RIGHT]  = ListenerGain * WetMix * aluSqrt((     PanningLR)*(     PanningFB));
 534                 }
 535                 else
 536                 {
 537                     wetsend[FRONT_LEFT]  = 0.0f;
 538                     wetsend[FRONT_RIGHT] = 0.0f;
 539                     wetsend[BACK_LEFT]   = 0.0f;
 540                     wetsend[BACK_RIGHT]  = 0.0f;
 541                     WetGainHF = 1.0f;
 542                 }
 543                 break;
 544             case 7:
 545             case 8:
 546                 PanningFB = 1.0f - fabs(Position[2]*1.15470054f);
 547                 PanningFB = __min(1.0f, PanningFB);
 548                 PanningFB = __max(0.0f, PanningFB);
 549                 PanningLR = 0.5f + (0.5*Position[0]*((1.0f-PanningFB)*2.0f));
 550                 PanningLR = __min(1.0f, PanningLR);
 551                 PanningLR = __max(0.0f, PanningLR);
 552                 if(Position[2] > 0.0f)
 553                 {
 554                     drysend[BACK_LEFT]   = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 555                     drysend[BACK_RIGHT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 556                     drysend[SIDE_LEFT]   = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 557                     drysend[SIDE_RIGHT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(     PanningFB));
 558                     drysend[FRONT_LEFT]  = 0.0f;
 559                     drysend[FRONT_RIGHT] = 0.0f;
 560                     if(ALSource->Send[0].Slot)
 561                     {
 562                         WetMix *= ALSource->Send[0].Slot->Gain;
 563                         wetsend[BACK_LEFT]   = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 564                         wetsend[BACK_RIGHT]  = ListenerGain * WetMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 565                         wetsend[SIDE_LEFT]   = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 566                         wetsend[SIDE_RIGHT]  = ListenerGain * WetMix * aluSqrt((     PanningLR)*(     PanningFB));
 567                         wetsend[FRONT_LEFT]  = 0.0f;
 568                         wetsend[FRONT_RIGHT] = 0.0f;
 569                     }
 570                     else
 571                     {
 572                         wetsend[FRONT_LEFT]  = 0.0f;
 573                         wetsend[FRONT_RIGHT] = 0.0f;
 574                         wetsend[SIDE_LEFT]   = 0.0f;
 575                         wetsend[SIDE_RIGHT]  = 0.0f;
 576                         wetsend[BACK_LEFT]   = 0.0f;
 577                         wetsend[BACK_RIGHT]  = 0.0f;
 578                         WetGainHF = 1.0f;
 579                     }
 580                 }
 581                 else
 582                 {
 583                     drysend[FRONT_LEFT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 584                     drysend[FRONT_RIGHT] = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 585                     drysend[SIDE_LEFT]   = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 586                     drysend[SIDE_RIGHT]  = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(     PanningFB));
 587                     drysend[BACK_LEFT]   = 0.0f;
 588                     drysend[BACK_RIGHT]  = 0.0f;
 589                     if(ALSource->Send[0].Slot)
 590                     {
 591                         WetMix *= ALSource->Send[0].Slot->Gain;
 592                         wetsend[FRONT_LEFT]  = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB));
 593                         wetsend[FRONT_RIGHT] = ListenerGain * WetMix * aluSqrt((     PanningLR)*(1.0f-PanningFB));
 594                         wetsend[SIDE_LEFT]   = ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(     PanningFB));
 595                         wetsend[SIDE_RIGHT]  = ListenerGain * WetMix * aluSqrt((     PanningLR)*(     PanningFB));
 596                         wetsend[BACK_LEFT]   = 0.0f;
 597                         wetsend[BACK_RIGHT]  = 0.0f;
 598                     }
 599                     else
 600                     {
 601                         wetsend[FRONT_LEFT]  = 0.0f;
 602                         wetsend[FRONT_RIGHT] = 0.0f;
 603                         wetsend[SIDE_LEFT]   = 0.0f;
 604                         wetsend[SIDE_RIGHT]  = 0.0f;
 605                         wetsend[BACK_LEFT]   = 0.0f;
 606                         wetsend[BACK_RIGHT]  = 0.0f;
 607                         WetGainHF = 1.0f;
 608                     }
 609                 }
 610             default:
 611                 break;
 612         }
 613
 614         *drygainhf = DryGainHF;
 615         *wetgainhf = WetGainHF;
 616     }
 617     else
 618     {
 619         *drygainhf = DryGainHF;
 620         *wetgainhf = WetGainHF;
 621
 622         //1. Multi-channel buffers always play "normal"
 623         drysend[FRONT_LEFT]  = SourceVolume * 1.0f * ListenerGain;
 624         drysend[FRONT_RIGHT] = SourceVolume * 1.0f * ListenerGain;
 625         drysend[SIDE_LEFT]   = SourceVolume * 1.0f * ListenerGain;
 626         drysend[SIDE_RIGHT]  = SourceVolume * 1.0f * ListenerGain;
 627         drysend[BACK_LEFT]   = SourceVolume * 1.0f * ListenerGain;
 628         drysend[BACK_RIGHT]  = SourceVolume * 1.0f * ListenerGain;
 629         drysend[CENTER]      = SourceVolume * 1.0f * ListenerGain;
 630         drysend[LFE]         = SourceVolume * 1.0f * ListenerGain;
 631         if(ALSource->Send[0].Slot)
 632         {
 633             wetsend[FRONT_LEFT]  = SourceVolume * 0.0f * ListenerGain;
 634             wetsend[FRONT_RIGHT] = SourceVolume * 0.0f * ListenerGain;
 635             wetsend[SIDE_LEFT]   = SourceVolume * 0.0f * ListenerGain;
 636             wetsend[SIDE_RIGHT]  = SourceVolume * 0.0f * ListenerGain;
 637             wetsend[BACK_LEFT]   = SourceVolume * 0.0f * ListenerGain;
 638             wetsend[BACK_RIGHT]  = SourceVolume * 0.0f * ListenerGain;
 639             wetsend[CENTER]      = SourceVolume * 0.0f * ListenerGain;
 640             wetsend[LFE]         = SourceVolume * 0.0f * ListenerGain;
 641         }
 642         else
 643         {
 644             wetsend[FRONT_LEFT]  = 0.0f;
 645             wetsend[FRONT_RIGHT] = 0.0f;
 646             wetsend[SIDE_LEFT]   = 0.0f;
 647             wetsend[SIDE_RIGHT]  = 0.0f;
 648             wetsend[BACK_LEFT]   = 0.0f;
 649             wetsend[BACK_RIGHT]  = 0.0f;
 650             wetsend[CENTER]      = 0.0f;
 651             wetsend[LFE]         = 0.0f;
 652             *wetgainhf = 1.0f;
 653         }
 654
 655         pitch[0] = ALSource->flPitch;
 656     }
 657 }
 658
 659 ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum format)
 660 {
 661     static float DryBuffer[BUFFERSIZE][OUTPUTCHANNELS];
 662     static float WetBuffer[BUFFERSIZE][OUTPUTCHANNELS];
 663     ALfloat DrySend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
 664     ALfloat WetSend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
 665     ALfloat DryGainHF = 0.0f;
 666     ALfloat WetGainHF = 0.0f;
 667     ALuint BlockAlign,BufferSize;
 668     ALuint DataSize=0,DataPosInt=0,DataPosFrac=0;
 669     ALuint Channels,Frequency,ulExtraSamples;
 670     ALfloat Pitch;
 671     ALint Looping,increment,State;
 672     ALuint Buffer,fraction;
 673     ALuint SamplesToDo;
 674     ALsource *ALSource;
 675     ALbuffer *ALBuffer;
 676     ALfloat value;
 677     ALshort *Data;
 678     ALuint i,j,k;
 679     ALbufferlistitem *BufferListItem;
 680     ALuint loop;
 681     ALint64 DataSize64,DataPos64;
 682
 683     SuspendContext(ALContext);
 684
 685     if(buffer)
 686     {
 687         //Figure output format variables
 688         BlockAlign  = aluChannelsFromFormat(format);
 689         BlockAlign *= aluBytesFromFormat(format);
 690
 691         size /= BlockAlign;
 692         while(size > 0)
 693         {
 694             //Setup variables
 695             ALSource = (ALContext ? ALContext->Source : NULL);
 696             SamplesToDo = min(size, BUFFERSIZE);
 697
 698             //Clear mixing buffer
 699             memset(DryBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat));
 700             memset(WetBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat));
 701
 702             //Actual mixing loop
 703             while(ALSource)
 704             {
 705                 j = 0;
 706                 State = ALSource->state;
 707                 while(State == AL_PLAYING && j < SamplesToDo)
 708                 {
 709                     DataSize = 0;
 710                     DataPosInt = 0;
 711                     DataPosFrac = 0;
 712
 713                     //Get buffer info
 714                     if((Buffer = ALSource->ulBufferID))
 715                     {
 716                         ALBuffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(Buffer);
 717
 718                         Data      = ALBuffer->data;
 719                         Channels  = aluChannelsFromFormat(ALBuffer->format);
 720                         DataSize  = ALBuffer->size;
 721                         Frequency = ALBuffer->frequency;
 722
 723                         CalcSourceParams(ALContext, ALSource,
 724                                          (Channels==1) ? AL_TRUE : AL_FALSE,
 725                                          format, DrySend, WetSend, &Pitch,
 726                                          &DryGainHF, &WetGainHF);
 727
 728
 729                         Pitch = (Pitch*Frequency) / ALContext->Frequency;
 730                         DataSize /= Channels * aluBytesFromFormat(ALBuffer->format);
 731
 732                         //Get source info
 733                         DataPosInt = ALSource->position;
 734                         DataPosFrac = ALSource->position_fraction;
 735
 736                         //Compute 18.14 fixed point step
 737                         increment = aluF2L(Pitch*(1L<<FRACTIONBITS));
 738                         if(increment > (MAX_PITCH<<FRACTIONBITS))
 739                             increment = (MAX_PITCH<<FRACTIONBITS);
 740
 741                         //Figure out how many samples we can mix.
 742                         //Pitch must be <= 4 (the number below !)
 743                         DataSize64 = DataSize+MAX_PITCH;
 744                         DataSize64 <<= FRACTIONBITS;
 745                         DataPos64 = DataPosInt;
 746                         DataPos64 <<= FRACTIONBITS;
 747                         DataPos64 += DataPosFrac;
 748                         BufferSize = (ALuint)((DataSize64-DataPos64) / increment);
 749                         BufferListItem = ALSource->queue;
 750                         for(loop = 0; loop < ALSource->BuffersPlayed; loop++)
 751                         {
 752                             if(BufferListItem)
 753                                 BufferListItem = BufferListItem->next;
 754                         }
 755                         if (BufferListItem)
 756                         {
 757                             if (BufferListItem->next)
 758                             {
 759                                 if(BufferListItem->next->buffer &&
 760                                    ((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->data)
 761                                 {
 762                                     ulExtraSamples = min(((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->size, (ALint)(16*Channels));
 763                                     memcpy(&Data[DataSize*Channels], ((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->data, ulExtraSamples);
 764                                 }
 765                             }
 766                             else if (ALSource->bLooping)
 767                             {
 768                                 if (ALSource->queue->buffer)
 769                                 {
 770                                     if(((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->data)
 771                                     {
 772                                         ulExtraSamples = min(((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->size, (ALint)(16*Channels));
 773                                         memcpy(&Data[DataSize*Channels], ((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->data, ulExtraSamples);
 774                                     }
 775                                 }
 776                             }
 777                         }
 778                         BufferSize = min(BufferSize, (SamplesToDo-j));
 779
 780                         //Actual sample mixing loop
 781                         Data += DataPosInt*Channels;
 782                         while(BufferSize--)
 783                         {
 784                             k = DataPosFrac>>FRACTIONBITS;
 785                             fraction = DataPosFrac&FRACTIONMASK;
 786                             if(Channels==1)
 787                             {
 788                                 //First order interpolator
 789                                 ALfloat sample = (ALfloat)((ALshort)(((Data[k]*((1L<<FRACTIONBITS)-fraction))+(Data[k+1]*(fraction)))>>FRACTIONBITS));
 790
 791                                 //Direct path final mix buffer and panning
 792                                 value = aluComputeDrySample(ALSource, DryGainHF, sample);
 793                                 DryBuffer[j][FRONT_LEFT]  += value*DrySend[FRONT_LEFT];
 794                                 DryBuffer[j][FRONT_RIGHT] += value*DrySend[FRONT_RIGHT];
 795                                 DryBuffer[j][SIDE_LEFT]   += value*DrySend[SIDE_LEFT];
 796                                 DryBuffer[j][SIDE_RIGHT]  += value*DrySend[SIDE_RIGHT];
 797                                 DryBuffer[j][BACK_LEFT]   += value*DrySend[BACK_LEFT];
 798                                 DryBuffer[j][BACK_RIGHT]  += value*DrySend[BACK_RIGHT];
 799                                 //Room path final mix buffer and panning
 800                                 value = aluComputeWetSample(ALSource, WetGainHF, sample);
 801                                 WetBuffer[j][FRONT_LEFT]  += value*WetSend[FRONT_LEFT];
 802                                 WetBuffer[j][FRONT_RIGHT] += value*WetSend[FRONT_RIGHT];
 803                                 WetBuffer[j][SIDE_LEFT]   += value*WetSend[SIDE_LEFT];
 804                                 WetBuffer[j][SIDE_RIGHT]  += value*WetSend[SIDE_RIGHT];
 805                                 WetBuffer[j][BACK_LEFT]   += value*WetSend[BACK_LEFT];
 806                                 WetBuffer[j][BACK_RIGHT]  += value*WetSend[BACK_RIGHT];
 807                             }
 808                             else
 809                             {
 810                                 //First order interpolator (front left)
 811                                 value = (ALfloat)((ALshort)(((Data[k*Channels  ]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels  ]*(fraction)))>>FRACTIONBITS));
 812                                 DryBuffer[j][FRONT_LEFT] += value*DrySend[FRONT_LEFT];
 813                                 WetBuffer[j][FRONT_LEFT] += value*WetSend[FRONT_LEFT];
 814                                 //First order interpolator (front right)
 815                                 value = (ALfloat)((ALshort)(((Data[k*Channels+1]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+1]*(fraction)))>>FRACTIONBITS));
 816                                 DryBuffer[j][FRONT_RIGHT] += value*DrySend[FRONT_RIGHT];
 817                                 WetBuffer[j][FRONT_RIGHT] += value*WetSend[FRONT_RIGHT];
 818                                 if(Channels >= 4)
 819                                 {
 820                                     int i = 2;
 821                                     if(Channels >= 6)
 822                                     {
 823                                         if(Channels != 7)
 824                                         {
 825                                             //First order interpolator (center)
 826                                             value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 827                                             DryBuffer[j][CENTER] += value*DrySend[CENTER];
 828                                             WetBuffer[j][CENTER] += value*WetSend[CENTER];
 829                                             i++;
 830                                         }
 831                                         //First order interpolator (lfe)
 832                                         value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 833                                         DryBuffer[j][LFE] += value*DrySend[LFE];
 834                                         WetBuffer[j][LFE] += value*WetSend[LFE];
 835                                         i++;
 836                                     }
 837                                     //First order interpolator (back left)
 838                                     value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 839                                     DryBuffer[j][BACK_LEFT] += value*DrySend[BACK_LEFT];
 840                                     WetBuffer[j][BACK_LEFT] += value*WetSend[BACK_LEFT];
 841                                     i++;
 842                                     //First order interpolator (back right)
 843                                     value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 844                                     DryBuffer[j][BACK_RIGHT] += value*DrySend[BACK_RIGHT];
 845                                     WetBuffer[j][BACK_RIGHT] += value*WetSend[BACK_RIGHT];
 846                                     i++;
 847                                     if(Channels >= 7)
 848                                     {
 849                                         //First order interpolator (side left)
 850                                         value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 851                                         DryBuffer[j][SIDE_LEFT] += value*DrySend[SIDE_LEFT];
 852                                         WetBuffer[j][SIDE_LEFT] += value*WetSend[SIDE_LEFT];
 853                                         i++;
 854                                         //First order interpolator (side right)
 855                                         value = (ALfloat)((ALshort)(((Data[k*Channels+i]*((1L<<FRACTIONBITS)-fraction))+(Data[(k+1)*Channels+i]*(fraction)))>>FRACTIONBITS));
 856                                         DryBuffer[j][SIDE_RIGHT] += value*DrySend[SIDE_RIGHT];
 857                                         WetBuffer[j][SIDE_RIGHT] += value*WetSend[SIDE_RIGHT];
 858                                         i++;
 859                                     }
 860                                 }
 861                             }
 862                             DataPosFrac += increment;
 863                             j++;
 864                         }
 865                         DataPosInt += (DataPosFrac>>FRACTIONBITS);
 866                         DataPosFrac = (DataPosFrac&FRACTIONMASK);
 867
 868                         //Update source info
 869                         ALSource->position = DataPosInt;
 870                         ALSource->position_fraction = DataPosFrac;
 871                     }
 872
 873                     //Handle looping sources
 874                     if(!Buffer || DataPosInt >= DataSize)
 875                     {
 876                         //queueing
 877                         if(ALSource->queue)
 878                         {
 879                             Looping = ALSource->bLooping;
 880                             if(ALSource->BuffersPlayed < (ALSource->BuffersInQueue-1))
 881                             {
 882                                 BufferListItem = ALSource->queue;
 883                                 for(loop = 0; loop <= ALSource->BuffersPlayed; loop++)
 884                                 {
 885                                     if(BufferListItem)
 886                                     {
 887                                         if(!Looping)
 888                                             BufferListItem->bufferstate = PROCESSED;
 889                                         BufferListItem = BufferListItem->next;
 890                                     }
 891                                 }
 892                                 if(!Looping)
 893                                     ALSource->BuffersProcessed++;
 894                                 if(BufferListItem)
 895                                     ALSource->ulBufferID = BufferListItem->buffer;
 896                                 ALSource->position = DataPosInt-DataSize;
 897                                 ALSource->position_fraction = DataPosFrac;
 898                                 ALSource->BuffersPlayed++;
 899                             }
 900                             else
 901                             {
 902                                 if(!Looping)
 903                                 {
 904                                     /* alSourceStop */
 905                                     ALSource->state = AL_STOPPED;
 906                                     ALSource->inuse = AL_FALSE;
 907                                     ALSource->BuffersPlayed = ALSource->BuffersProcessed = ALSource->BuffersInQueue;
 908                                     BufferListItem = ALSource->queue;
 909                                     while(BufferListItem != NULL)
 910                                     {
 911                                         BufferListItem->bufferstate = PROCESSED;
 912                                         BufferListItem = BufferListItem->next;
 913                                     }
 914                                 }
 915                                 else
 916                                 {
 917                                     /* alSourceRewind */
 918                                     /* alSourcePlay */
 919                                     ALSource->state = AL_PLAYING;
 920                                     ALSource->inuse = AL_TRUE;
 921                                     ALSource->play = AL_TRUE;
 922                                     ALSource->BuffersPlayed = 0;
 923                                     ALSource->BufferPosition = 0;
 924                                     ALSource->lBytesPlayed = 0;
 925                                     ALSource->BuffersProcessed = 0;
 926                                     BufferListItem = ALSource->queue;
 927                                     while(BufferListItem != NULL)
 928                                     {
 929                                         BufferListItem->bufferstate = PENDING;
 930                                         BufferListItem = BufferListItem->next;
 931                                     }
 932                                     ALSource->ulBufferID = ALSource->queue->buffer;
 933
 934                                     ALSource->position = DataPosInt-DataSize;
 935                                     ALSource->position_fraction = DataPosFrac;
 936                                 }
 937                             }
 938                         }
 939                     }
 940
 941                     //Get source state
 942                     State = ALSource->state;
 943                 }
 944
 945                 ALSource = ALSource->next;
 946             }
 947
 948             //Post processing loop
 949             switch(format)
 950             {
 951                 case AL_FORMAT_MONO8:
 952                     for(i = 0;i < SamplesToDo;i++)
 953                     {
 954                         ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT]+DryBuffer[i][FRONT_RIGHT]+
 955                                                                   WetBuffer[i][FRONT_LEFT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
 956                         buffer = ((ALubyte*)buffer) + 1;
 957                     }
 958                     break;
 959                 case AL_FORMAT_STEREO8:
 960                     if(ALContext->bs2b)
 961                     {
 962                         for(i = 0;i < SamplesToDo;i++)
 963                         {
 964                             float samples[2];
 965                             samples[0] = DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT];
 966                             samples[1] = DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT];
 967                             bs2b_cross_feed(ALContext->bs2b, samples);
 968                             ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(samples[0])>>8)+128);
 969                             ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(samples[1])>>8)+128);
 970                             buffer = ((ALubyte*)buffer) + 2;
 971                         }
 972                     }
 973                     else
 974                     {
 975                         for(i = 0;i < SamplesToDo;i++)
 976                         {
 977                             ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT])>>8)+128);
 978                             ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
 979                             buffer = ((ALubyte*)buffer) + 2;
 980                         }
 981                     }
 982                     break;
 983                 case AL_FORMAT_QUAD8:
 984                     for(i = 0;i < SamplesToDo;i++)
 985                     {
 986                         ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT])>>8)+128);
 987                         ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
 988                         ((ALubyte*)buffer)[2] = (ALubyte)((aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT])>>8)+128);
 989                         ((ALubyte*)buffer)[3] = (ALubyte)((aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT])>>8)+128);
 990                         buffer = ((ALubyte*)buffer) + 4;
 991                     }
 992                     break;
 993                 case AL_FORMAT_51CHN8:
 994                     for(i = 0;i < SamplesToDo;i++)
 995                     {
 996                         ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT])>>8)+128);
 997                         ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
 998                         ((ALubyte*)buffer)[2] = (ALubyte)((aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT])>>8)+128);
 999                         ((ALubyte*)buffer)[3] = (ALubyte)((aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT])>>8)+128);
1000                         ((ALubyte*)buffer)[4] = (ALubyte)((aluF2S(DryBuffer[i][CENTER]     +WetBuffer[i][CENTER])>>8)+128);
1001                         ((ALubyte*)buffer)[5] = (ALubyte)((aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE])>>8)+128);
1002                         buffer = ((ALubyte*)buffer) + 6;
1003                     }
1004                     break;
1005                 case AL_FORMAT_61CHN8:
1006                     for(i = 0;i < SamplesToDo;i++)
1007                     {
1008                         ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT])>>8)+128);
1009                         ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
1010                         ((ALubyte*)buffer)[2] = (ALubyte)((aluF2S(DryBuffer[i][SIDE_LEFT]  +WetBuffer[i][SIDE_LEFT])>>8)+128);
1011                         ((ALubyte*)buffer)[3] = (ALubyte)((aluF2S(DryBuffer[i][SIDE_RIGHT] +WetBuffer[i][SIDE_RIGHT])>>8)+128);
1012                         ((ALubyte*)buffer)[4] = (ALubyte)((aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT])>>8)+128);
1013                         ((ALubyte*)buffer)[5] = (ALubyte)((aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT])>>8)+128);
1014                         ((ALubyte*)buffer)[6] = (ALubyte)((aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE])>>8)+128);
1015                         buffer = ((ALubyte*)buffer) + 7;
1016                     }
1017                     break;
1018                 case AL_FORMAT_71CHN8:
1019                     for(i = 0;i < SamplesToDo;i++)
1020                     {
1021                         ((ALubyte*)buffer)[0] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT])>>8)+128);
1022                         ((ALubyte*)buffer)[1] = (ALubyte)((aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT])>>8)+128);
1023                         ((ALubyte*)buffer)[2] = (ALubyte)((aluF2S(DryBuffer[i][SIDE_LEFT]  +WetBuffer[i][SIDE_LEFT])>>8)+128);
1024                         ((ALubyte*)buffer)[3] = (ALubyte)((aluF2S(DryBuffer[i][SIDE_RIGHT] +WetBuffer[i][SIDE_RIGHT])>>8)+128);
1025                         ((ALubyte*)buffer)[4] = (ALubyte)((aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT])>>8)+128);
1026                         ((ALubyte*)buffer)[5] = (ALubyte)((aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT])>>8)+128);
1027                         ((ALubyte*)buffer)[6] = (ALubyte)((aluF2S(DryBuffer[i][CENTER]     +WetBuffer[i][CENTER])>>8)+128);
1028                         ((ALubyte*)buffer)[7] = (ALubyte)((aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE])>>8)+128);
1029                         buffer = ((ALubyte*)buffer) + 8;
1030                     }
1031                     break;
1032
1033                 case AL_FORMAT_MONO16:
1034                     for(i = 0;i < SamplesToDo;i++)
1035                     {
1036                         ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT]+DryBuffer[i][FRONT_RIGHT]+
1037                                                        WetBuffer[i][FRONT_LEFT]+WetBuffer[i][FRONT_RIGHT]);
1038                         buffer = ((ALshort*)buffer) + 1;
1039                     }
1040                     break;
1041                 case AL_FORMAT_STEREO16:
1042                     if(ALContext->bs2b)
1043                     {
1044                         for(i = 0;i < SamplesToDo;i++)
1045                         {
1046                             float samples[2];
1047                             samples[0] = DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT];
1048                             samples[1] = DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT];
1049                             bs2b_cross_feed(ALContext->bs2b, samples);
1050                             ((ALshort*)buffer)[0] = aluF2S(samples[0]);
1051                             ((ALshort*)buffer)[1] = aluF2S(samples[1]);
1052                             buffer = ((ALshort*)buffer) + 2;
1053                         }
1054                     }
1055                     else
1056                     {
1057                         for(i = 0;i < SamplesToDo;i++)
1058                         {
1059                             ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT]);
1060                             ((ALshort*)buffer)[1] = aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT]);
1061                             buffer = ((ALshort*)buffer) + 2;
1062                         }
1063                     }
1064                     break;
1065                 case AL_FORMAT_QUAD16:
1066                     for(i = 0;i < SamplesToDo;i++)
1067                     {
1068                         ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT]);
1069                         ((ALshort*)buffer)[1] = aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT]);
1070                         ((ALshort*)buffer)[2] = aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT]);
1071                         ((ALshort*)buffer)[3] = aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT]);
1072                         buffer = ((ALshort*)buffer) + 4;
1073                     }
1074                     break;
1075                 case AL_FORMAT_51CHN16:
1076                     for(i = 0;i < SamplesToDo;i++)
1077                     {
1078                         ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT]);
1079                         ((ALshort*)buffer)[1] = aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT]);
1080                         ((ALshort*)buffer)[2] = aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT]);
1081                         ((ALshort*)buffer)[3] = aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT]);
1082                         ((ALshort*)buffer)[4] = aluF2S(DryBuffer[i][CENTER]     +WetBuffer[i][CENTER]);
1083                         ((ALshort*)buffer)[5] = aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE]);
1084                         buffer = ((ALshort*)buffer) + 6;
1085                     }
1086                     break;
1087                 case AL_FORMAT_61CHN16:
1088                     for(i = 0;i < SamplesToDo;i++)
1089                     {
1090                         ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT]);
1091                         ((ALshort*)buffer)[1] = aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT]);
1092                         ((ALshort*)buffer)[2] = aluF2S(DryBuffer[i][SIDE_LEFT]  +WetBuffer[i][SIDE_LEFT]);
1093                         ((ALshort*)buffer)[3] = aluF2S(DryBuffer[i][SIDE_RIGHT] +WetBuffer[i][SIDE_RIGHT]);
1094                         ((ALshort*)buffer)[4] = aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT]);
1095                         ((ALshort*)buffer)[5] = aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT]);
1096                         ((ALshort*)buffer)[6] = aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE]);
1097                         buffer = ((ALshort*)buffer) + 7;
1098                     }
1099                     break;
1100                 case AL_FORMAT_71CHN16:
1101                     for(i = 0;i < SamplesToDo;i++)
1102                     {
1103                         ((ALshort*)buffer)[0] = aluF2S(DryBuffer[i][FRONT_LEFT] +WetBuffer[i][FRONT_LEFT]);
1104                         ((ALshort*)buffer)[1] = aluF2S(DryBuffer[i][FRONT_RIGHT]+WetBuffer[i][FRONT_RIGHT]);
1105                         ((ALshort*)buffer)[2] = aluF2S(DryBuffer[i][SIDE_LEFT]  +WetBuffer[i][SIDE_LEFT]);
1106                         ((ALshort*)buffer)[3] = aluF2S(DryBuffer[i][SIDE_RIGHT] +WetBuffer[i][SIDE_RIGHT]);
1107                         ((ALshort*)buffer)[4] = aluF2S(DryBuffer[i][BACK_LEFT]  +WetBuffer[i][BACK_LEFT]);
1108                         ((ALshort*)buffer)[5] = aluF2S(DryBuffer[i][BACK_RIGHT] +WetBuffer[i][BACK_RIGHT]);
1109                         ((ALshort*)buffer)[6] = aluF2S(DryBuffer[i][CENTER]     +WetBuffer[i][CENTER]);
1110                         ((ALshort*)buffer)[7] = aluF2S(DryBuffer[i][LFE]        +WetBuffer[i][LFE]);
1111                         buffer = ((ALshort*)buffer) + 8;
1112                     }
1113                     break;
1114
1115                 default:
1116                     break;
1117             }
1118
1119             size -= SamplesToDo;
1120         }
1121     }
1122
1123     ProcessContext(ALContext);
1124 }