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