Move ALu.c to the Alc directory

1 files changed, 677 insertions, 0 deletions

diff --git a/Alc/ALu.c b/Alc/ALu.c
new file mode 100644
index 00000000..1b9fbce9
--- /dev/null
+++ b/Alc/ALu.c
@@ -0,0 +1,677 @@
+/**
+ * OpenAL cross platform audio library
+ * Copyright (C) 1999-2007 by authors.
+ * This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the
+ *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ *  Boston, MA  02111-1307, USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#define _CRT_SECURE_NO_DEPRECATE // get rid of sprintf security warnings on VS2005
+
+#include "config.h"
+
+#include <math.h>
+#include "alMain.h"
+#include "AL/al.h"
+#include "AL/alc.h"
+
+#if defined(HAVE_STDINT_H)
+#include <stdint.h>
+typedef int64_t ALint64;
+#elif defined(HAVE___INT64)
+typedef __int64 ALint64;
+#elif (SIZEOF_LONG == 8)
+typedef long ALint64;
+#elif (SIZEOF_LONG_LONG == 8)
+typedef long long ALint64;
+#endif
+
+#ifdef HAVE_SQRTF
+#define aluSqrt(x) ((ALfloat)sqrtf((float)(x)))
+#else
+#define aluSqrt(x) ((ALfloat)sqrt((double)(x)))
+#endif
+
+// fixes for mingw32.
+#if defined(max) && !defined(__max)
+#define __max max
+#endif
+#if defined(min) && !defined(__min)
+#define __min min
+#endif
+
+__inline ALuint aluBytesFromFormat(ALenum format)
+{
+    switch(format)
+    {
+        case AL_FORMAT_MONO8:
+        case AL_FORMAT_STEREO8:
+        case AL_FORMAT_QUAD8:
+            return 1;
+
+        case AL_FORMAT_MONO16:
+        case AL_FORMAT_STEREO16:
+        case AL_FORMAT_QUAD16:
+            return 2;
+
+        default:
+            return 0;
+    }
+}
+
+__inline ALuint aluChannelsFromFormat(ALenum format)
+{
+    switch(format)
+    {
+        case AL_FORMAT_MONO8:
+        case AL_FORMAT_MONO16:
+            return 1;
+
+        case AL_FORMAT_STEREO8:
+        case AL_FORMAT_STEREO16:
+            return 2;
+
+        case AL_FORMAT_QUAD8:
+        case AL_FORMAT_QUAD16:
+            return 4;
+
+        default:
+            return 0;
+    }
+}
+
+static __inline ALint aluF2L(ALfloat Value)
+{
+    if(sizeof(ALint) == 4 && sizeof(double) == 8)
+    {
+        double temp;
+        temp = Value + (((65536.0*65536.0*16.0)+(65536.0*65536.0*8.0))*65536.0);
+        return *((ALint*)&temp);
+    }
+    return (ALint)Value;
+}
+
+static __inline ALshort aluF2S(ALfloat Value)
+{
+    ALint i;
+
+    i = aluF2L(Value);
+    i = __min( 32767, i);
+    i = __max(-32768, i);
+    return ((ALshort)i);
+}
+
+static __inline ALvoid aluCrossproduct(ALfloat *inVector1,ALfloat *inVector2,ALfloat *outVector)
+{
+    outVector[0] = inVector1[1]*inVector2[2] - inVector1[2]*inVector2[1];
+    outVector[1] = inVector1[2]*inVector2[0] - inVector1[0]*inVector2[2];
+    outVector[2] = inVector1[0]*inVector2[1] - inVector1[1]*inVector2[0];
+}
+
+static __inline ALfloat aluDotproduct(ALfloat *inVector1,ALfloat *inVector2)
+{
+    return inVector1[0]*inVector2[0] + inVector1[1]*inVector2[1] +
+           inVector1[2]*inVector2[2];
+}
+
+static __inline ALvoid aluNormalize(ALfloat *inVector)
+{
+    ALfloat length, inverse_length;
+
+    length = (ALfloat)aluSqrt(aluDotproduct(inVector, inVector));
+    if(length != 0)
+    {
+        inverse_length = 1.0f/length;
+        inVector[0] *= inverse_length;
+        inVector[1] *= inverse_length;
+        inVector[2] *= inverse_length;
+    }
+}
+
+static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat matrix[3][3])
+{
+    ALfloat result[3];
+
+    result[0] = vector[0]*matrix[0][0] + vector[1]*matrix[1][0] + vector[2]*matrix[2][0];
+    result[1] = vector[0]*matrix[0][1] + vector[1]*matrix[1][1] + vector[2]*matrix[2][1];
+    result[2] = vector[0]*matrix[0][2] + vector[1]*matrix[1][2] + vector[2]*matrix[2][2];
+    memcpy(vector, result, sizeof(result));
+}
+
+static ALvoid CalcSourceParams(ALCcontext *ALContext, ALsource *ALSource,
+                               ALenum isMono, ALenum OutputFormat,
+                               ALfloat *drysend, ALfloat *wetsend,
+                               ALfloat *pitch)
+{
+    ALfloat ListenerOrientation[6],ListenerPosition[3],ListenerVelocity[3];
+    ALfloat InnerAngle,OuterAngle,OuterGain,Angle,Distance,DryMix,WetMix;
+    ALfloat Direction[3],Position[3],Velocity[3],SourceToListener[3];
+    ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff;
+    ALfloat Pitch,ConeVolume,SourceVolume,PanningFB,PanningLR,ListenerGain;
+    ALfloat U[3],V[3],N[3];
+    ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound, flMaxVelocity;
+    ALfloat flVSS, flVLS;
+    ALint DistanceModel;
+    ALfloat Matrix[3][3];
+    ALint HeadRelative;
+    ALfloat flAttenuation;
+
+    //Get context properties
+    DopplerFactor   = ALContext->DopplerFactor;
+    DistanceModel   = ALContext->DistanceModel;
+    DopplerVelocity = ALContext->DopplerVelocity;
+    flSpeedOfSound  = ALContext->flSpeedOfSound;
+
+    //Get listener properties
+    ListenerGain = ALContext->Listener.Gain;
+    memcpy(ListenerPosition, ALContext->Listener.Position, sizeof(ALContext->Listener.Position));
+    memcpy(ListenerVelocity, ALContext->Listener.Velocity, sizeof(ALContext->Listener.Velocity));
+    memcpy(&ListenerOrientation[0], ALContext->Listener.Forward, sizeof(ALContext->Listener.Forward));
+    memcpy(&ListenerOrientation[3], ALContext->Listener.Up, sizeof(ALContext->Listener.Up));
+
+    //Get source properties
+    Pitch        = ALSource->flPitch;
+    SourceVolume = ALSource->flGain;
+    memcpy(Position,  ALSource->vPosition,    sizeof(ALSource->vPosition));
+    memcpy(Velocity,  ALSource->vVelocity,    sizeof(ALSource->vVelocity));
+    memcpy(Direction, ALSource->vOrientation, sizeof(ALSource->vOrientation));
+    MinVolume    = ALSource->flMinGain;
+    MaxVolume    = ALSource->flMaxGain;
+    MinDist      = ALSource->flRefDistance;
+    MaxDist      = ALSource->flMaxDistance;
+    Rolloff      = ALSource->flRollOffFactor;
+    OuterGain    = ALSource->flOuterGain;
+    InnerAngle   = ALSource->flInnerAngle;
+    OuterAngle   = ALSource->flOuterAngle;
+    HeadRelative = ALSource->bHeadRelative;
+
+    //Set working variables
+    DryMix = (ALfloat)(1.0f);
+    WetMix = (ALfloat)(0.0f);
+
+    //Only apply 3D calculations for mono buffers
+    if(isMono != AL_FALSE)
+    {
+        //1. Translate Listener to origin (convert to head relative)
+        if(HeadRelative==AL_FALSE)
+        {
+            Position[0] -= ListenerPosition[0];
+            Position[1] -= ListenerPosition[1];
+            Position[2] -= ListenerPosition[2];
+        }
+
+        //2. Calculate distance attenuation
+        Distance = aluSqrt(aluDotproduct(Position, Position));
+
+        flAttenuation = 1.0f;
+        switch (DistanceModel)
+        {
+            case AL_INVERSE_DISTANCE_CLAMPED:
+                Distance=__max(Distance,MinDist);
+                Distance=__min(Distance,MaxDist);
+                if (MaxDist < MinDist)
+                    break;
+                //fall-through
+            case AL_INVERSE_DISTANCE:
+                if (MinDist > 0.0f)
+                {
+                    if ((MinDist + (Rolloff * (Distance - MinDist))) > 0.0f)
+                        flAttenuation = MinDist / (MinDist + (Rolloff * (Distance - MinDist)));
+                }
+                break;
+
+            case AL_LINEAR_DISTANCE_CLAMPED:
+                Distance=__max(Distance,MinDist);
+                Distance=__min(Distance,MaxDist);
+                if (MaxDist < MinDist)
+                    break;
+                //fall-through
+            case AL_LINEAR_DISTANCE:
+                Distance=__min(Distance,MaxDist);
+                if (MaxDist != MinDist)
+                    flAttenuation = 1.0f - (Rolloff*(Distance-MinDist)/(MaxDist - MinDist));
+                break;
+
+            case AL_EXPONENT_DISTANCE_CLAMPED:
+                Distance=__max(Distance,MinDist);
+                Distance=__min(Distance,MaxDist);
+                if (MaxDist < MinDist)
+                    break;
+                //fall-through
+            case AL_EXPONENT_DISTANCE:
+                if ((Distance > 0.0f) && (MinDist > 0.0f))
+                    flAttenuation = (ALfloat)pow(Distance/MinDist, -Rolloff);
+                break;
+
+            case AL_NONE:
+            default:
+                flAttenuation = 1.0f;
+                break;
+        }
+
+        // Source Gain + Attenuation
+        DryMix = SourceVolume * flAttenuation;
+
+        // Clamp to Min/Max Gain
+        DryMix = __min(DryMix,MaxVolume);
+        DryMix = __max(DryMix,MinVolume);
+        WetMix = __min(WetMix,MaxVolume);
+        WetMix = __max(WetMix,MinVolume);
+        //3. Apply directional soundcones
+        SourceToListener[0] = -Position[0];
+        SourceToListener[1] = -Position[1];
+        SourceToListener[2] = -Position[2];
+        aluNormalize(Direction);
+        aluNormalize(SourceToListener);
+        Angle = (ALfloat)(180.0*acos(aluDotproduct(Direction,SourceToListener))/3.141592654f);
+        if(Angle >= InnerAngle && Angle <= OuterAngle)
+            ConeVolume = (1.0f+(OuterGain-1.0f)*(Angle-InnerAngle)/(OuterAngle-InnerAngle));
+        else if(Angle > OuterAngle)
+            ConeVolume = (1.0f+(OuterGain-1.0f)                                           );
+        else
+            ConeVolume = 1.0f;
+
+        //4. Calculate Velocity
+        if(DopplerFactor != 0.0f)
+        {
+            flVLS = aluDotproduct(ListenerVelocity, SourceToListener);
+            flVSS = aluDotproduct(Velocity, SourceToListener);
+
+            flMaxVelocity = (DopplerVelocity * flSpeedOfSound) / DopplerFactor;
+
+            if (flVSS >= flMaxVelocity)
+                flVSS = (flMaxVelocity - 1.0f);
+            else if (flVSS <= -flMaxVelocity)
+                flVSS = -flMaxVelocity + 1.0f;
+
+            if (flVLS >= flMaxVelocity)
+                flVLS = (flMaxVelocity - 1.0f);
+            else if (flVLS <= -flMaxVelocity)
+                flVLS = -flMaxVelocity + 1.0f;
+
+            pitch[0] = Pitch * ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVLS)) /
+                               ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVSS));
+        }
+        else
+            pitch[0] = Pitch;
+
+        //5. Align coordinate system axes
+        aluCrossproduct(&ListenerOrientation[0], &ListenerOrientation[3], U); // Right-vector
+        aluNormalize(U);                                // Normalized Right-vector
+        memcpy(V, &ListenerOrientation[3], sizeof(V));  // Up-vector
+        aluNormalize(V);                                // Normalized Up-vector
+        memcpy(N, &ListenerOrientation[0], sizeof(N));  // At-vector
+        aluNormalize(N);                                // Normalized At-vector
+        Matrix[0][0] = U[0]; Matrix[0][1] = V[0]; Matrix[0][2] = -N[0];
+        Matrix[1][0] = U[1]; Matrix[1][1] = V[1]; Matrix[1][2] = -N[1];
+        Matrix[2][0] = U[2]; Matrix[2][1] = V[2]; Matrix[2][2] = -N[2];
+        aluMatrixVector(Position, Matrix);
+
+        //6. Convert normalized position into left/right front/back pannings
+        if(Distance != 0.0f)
+        {
+            aluNormalize(Position);
+            PanningLR = 0.5f + 0.5f*Position[0];
+            PanningFB = 0.5f + 0.5f*Position[2];
+        }
+        else
+        {
+            PanningLR = 0.5f;
+            PanningFB = 0.5f;
+        }
+
+        //7. Convert pannings into channel volumes
+        switch(OutputFormat)
+        {
+            case AL_FORMAT_MONO8:
+            case AL_FORMAT_MONO16:
+                drysend[0] = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f); //Direct
+                drysend[1] = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f); //Direct
+                wetsend[0] =              ListenerGain * WetMix * aluSqrt(1.0f); //Room
+                wetsend[1] =              ListenerGain * WetMix * aluSqrt(1.0f); //Room
+                break;
+            case AL_FORMAT_STEREO8:
+            case AL_FORMAT_STEREO16:
+                drysend[0] = ConeVolume * ListenerGain * DryMix * aluSqrt(1.0f-PanningLR); //L Direct
+                drysend[1] = ConeVolume * ListenerGain * DryMix * aluSqrt(     PanningLR); //R Direct
+                wetsend[0] =              ListenerGain * WetMix * aluSqrt(1.0f-PanningLR); //L Room
+                wetsend[1] =              ListenerGain * WetMix * aluSqrt(     PanningLR); //R Room
+                break;
+            case AL_FORMAT_QUAD8:
+            case AL_FORMAT_QUAD16:
+                drysend[0] = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB)); //FL Direct
+                drysend[1] = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(1.0f-PanningFB)); //FR Direct
+                drysend[2] = ConeVolume * ListenerGain * DryMix * aluSqrt((1.0f-PanningLR)*(     PanningFB)); //BL Direct
+                drysend[3] = ConeVolume * ListenerGain * DryMix * aluSqrt((     PanningLR)*(     PanningFB)); //BR Direct
+                wetsend[0] =              ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(1.0f-PanningFB)); //FL Room
+                wetsend[1] =              ListenerGain * WetMix * aluSqrt((     PanningLR)*(1.0f-PanningFB)); //FR Room
+                wetsend[2] =              ListenerGain * WetMix * aluSqrt((1.0f-PanningLR)*(     PanningFB)); //BL Room
+                wetsend[3] =              ListenerGain * WetMix * aluSqrt((     PanningLR)*(     PanningFB)); //BR Room
+                break;
+            default:
+                break;
+        }
+    }
+    else
+    {
+        //1. Multi-channel buffers always play "normal"
+        drysend[0] = SourceVolume * 1.0f * ListenerGain;
+        drysend[1] = SourceVolume * 1.0f * ListenerGain;
+        drysend[2] = SourceVolume * 1.0f * ListenerGain;
+        drysend[3] = SourceVolume * 1.0f * ListenerGain;
+        wetsend[0] = SourceVolume * 0.0f * ListenerGain;
+        wetsend[1] = SourceVolume * 0.0f * ListenerGain;
+        wetsend[2] = SourceVolume * 0.0f * ListenerGain;
+        wetsend[3] = SourceVolume * 0.0f * ListenerGain;
+
+        pitch[0] = Pitch;
+    }
+}
+
+ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum format)
+{
+    static float DryBuffer[BUFFERSIZE][OUTPUTCHANNELS];
+    static float WetBuffer[BUFFERSIZE][OUTPUTCHANNELS];
+    ALfloat DrySend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f };
+    ALfloat WetSend[OUTPUTCHANNELS] = { 0.0f, 0.0f, 0.0f, 0.0f };
+    ALuint BlockAlign,BufferSize;
+    ALuint DataSize=0,DataPosInt=0,DataPosFrac=0;
+    ALuint Channels,Bits,Frequency,ulExtraSamples;
+    ALfloat Pitch;
+    ALint Looping,increment,State;
+    ALuint Buffer,fraction;
+    ALuint SamplesToDo;
+    ALsource *ALSource;
+    ALbuffer *ALBuffer;
+    ALfloat value;
+    ALshort *Data;
+    ALuint i,j,k;
+    ALbufferlistitem *BufferListItem;
+    ALuint loop;
+    ALint64 DataSize64,DataPos64;
+
+    SuspendContext(ALContext);
+
+    if(buffer)
+    {
+        //Figure output format variables
+        BlockAlign = aluChannelsFromFormat(format) *
+                     aluBytesFromFormat(format);
+
+        size /= BlockAlign;
+        while(size > 0)
+        {
+            //Setup variables
+            ALSource = ALContext->Source;
+            SamplesToDo = min(size, BUFFERSIZE);
+
+            //Clear mixing buffer
+            memset(DryBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat));
+            memset(WetBuffer, 0, SamplesToDo*OUTPUTCHANNELS*sizeof(ALfloat));
+
+            //Actual mixing loop
+            while(ALSource)
+            {
+                j = 0;
+                State = ALSource->state;
+                while(State == AL_PLAYING && j < SamplesToDo)
+                {
+                    DataSize = 0;
+                    DataPosInt = 0;
+                    DataPosFrac = 0;
+
+                    //Get buffer info
+                    if((Buffer = ALSource->ulBufferID))
+                    {
+                        ALBuffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(Buffer);
+
+                        Data      = ALBuffer->data;
+                        Bits      = aluBytesFromFormat(ALBuffer->format) * 8;
+                        Channels  = aluChannelsFromFormat(ALBuffer->format);
+                        DataSize  = ALBuffer->size;
+                        Frequency = ALBuffer->frequency;
+
+                        CalcSourceParams(ALContext, ALSource,
+                                         (Channels==1) ? AL_TRUE : AL_FALSE,
+                                         format, DrySend, WetSend, &Pitch);
+
+
+                        Pitch = (Pitch*Frequency) / ALContext->Frequency;
+                        DataSize = DataSize / (Bits*Channels/8);
+
+                        //Get source info
+                        DataPosInt = ALSource->position;
+                        DataPosFrac = ALSource->position_fraction;
+
+                        //Compute 18.14 fixed point step
+                        increment = aluF2L(Pitch*(1L<<FRACTIONBITS));
+                        if(increment > (MAX_PITCH<<FRACTIONBITS))
+                            increment = (MAX_PITCH<<FRACTIONBITS);
+
+                        //Figure out how many samples we can mix.
+                        //Pitch must be <= 4 (the number below !)
+                        DataSize64 = DataSize+MAX_PITCH;
+                        DataSize64 <<= FRACTIONBITS;
+                        DataPos64 = DataPosInt;
+                        DataPos64 <<= FRACTIONBITS;
+                        DataPos64 += DataPosFrac;
+                        BufferSize = (ALuint)((DataSize64-DataPos64) / increment);
+                        BufferListItem = ALSource->queue;
+                        for(loop = 0; loop < ALSource->BuffersPlayed; loop++)
+                        {
+                            if(BufferListItem)
+                                BufferListItem = BufferListItem->next;
+                        }
+                        if (BufferListItem)
+                        {
+                            if (BufferListItem->next)
+                            {
+                                if(BufferListItem->next->buffer &&
+                                   ((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->data)
+                                {
+                                    ulExtraSamples = min(((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->size, (ALint)(16*Channels));
+                                    memcpy(&Data[DataSize*Channels], ((ALbuffer*)ALTHUNK_LOOKUPENTRY(BufferListItem->next->buffer))->data, ulExtraSamples);
+                                }
+                            }
+                            else if (ALSource->bLooping)
+                            {
+                                if (ALSource->queue->buffer)
+                                {
+                                    if(((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->data)
+                                    {
+                                        ulExtraSamples = min(((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->size, (ALint)(16*Channels));
+                                        memcpy(&Data[DataSize*Channels], ((ALbuffer*)ALTHUNK_LOOKUPENTRY(ALSource->queue->buffer))->data, ulExtraSamples);
+                                    }
+                                }
+                            }
+                        }
+                        BufferSize = min(BufferSize, (SamplesToDo-j));
+
+                        //Actual sample mixing loop
+                        Data += DataPosInt*Channels;
+                        while(BufferSize--)
+                        {
+                            k = DataPosFrac>>FRACTIONBITS;
+                            fraction = DataPosFrac&FRACTIONMASK;
+                            if(Channels==1)
+                            {
+                                //First order interpolator
+                                value = (ALfloat)((ALshort)(((Data[k]*((1L<<FRACTIONBITS)-fraction))+(Data[k+1]*(fraction)))>>FRACTIONBITS));
+                                //Direct path final mix buffer and panning
+                                DryBuffer[j][0] += value*DrySend[0];
+                                DryBuffer[j][1] += value*DrySend[1];
+                                DryBuffer[j][2] += value*DrySend[2];
+                                DryBuffer[j][3] += value*DrySend[3];
+                                //Room path final mix buffer and panning
+                                WetBuffer[j][0] += value*WetSend[0];
+                                WetBuffer[j][1] += value*WetSend[1];
+                                WetBuffer[j][2] += value*WetSend[2];
+                                WetBuffer[j][3] += value*WetSend[3];
+                            }
+                            else
+                            {
+                                //First order interpolator (left)
+                                value = (ALfloat)((ALshort)(((Data[k*2  ]*((1L<<FRACTIONBITS)-fraction))+(Data[k*2+2]*(fraction)))>>FRACTIONBITS));
+                                //Direct path final mix buffer and panning (left)
+                                DryBuffer[j][0] += value*DrySend[0];
+                                //Room path final mix buffer and panning (left)
+                                WetBuffer[j][0] += value*WetSend[0];
+                                //First order interpolator (right)
+                                value = (ALfloat)((ALshort)(((Data[k*2+1]*((1L<<FRACTIONBITS)-fraction))+(Data[k*2+3]*(fraction)))>>FRACTIONBITS));
+                                //Direct path final mix buffer and panning (right)
+                                DryBuffer[j][1] += value*DrySend[1];
+                                //Room path final mix buffer and panning (right)
+                                WetBuffer[j][1] += value*WetSend[1];
+                            }
+                            DataPosFrac += increment;
+                            j++;
+                        }
+                        DataPosInt += (DataPosFrac>>FRACTIONBITS);
+                        DataPosFrac = (DataPosFrac&FRACTIONMASK);
+
+                        //Update source info
+                        ALSource->position = DataPosInt;
+                        ALSource->position_fraction = DataPosFrac;
+                    }
+
+                    //Handle looping sources
+                    if(!Buffer || DataPosInt >= DataSize)
+                    {
+                        //queueing
+                        if(ALSource->queue)
+                        {
+                            Looping = ALSource->bLooping;
+                            if(ALSource->BuffersPlayed < (ALSource->BuffersInQueue-1))
+                            {
+                                BufferListItem = ALSource->queue;
+                                for(loop = 0; loop <= ALSource->BuffersPlayed; loop++)
+                                {
+                                    if(BufferListItem)
+                                    {
+                                        if(!Looping)
+                                            BufferListItem->bufferstate = PROCESSED;
+                                        BufferListItem = BufferListItem->next;
+                                    }
+                                }
+                                if(!Looping)
+                                    ALSource->BuffersProcessed++;
+                                if(BufferListItem)
+                                    ALSource->ulBufferID = BufferListItem->buffer;
+                                ALSource->position = DataPosInt-DataSize;
+                                ALSource->position_fraction = DataPosFrac;
+                                ALSource->BuffersPlayed++;
+                            }
+                            else
+                            {
+                                if(!Looping)
+                                {
+                                    /* alSourceStop */
+                                    ALSource->state = AL_STOPPED;
+                                    ALSource->inuse = AL_FALSE;
+                                    ALSource->BuffersPlayed = ALSource->BuffersProcessed = ALSource->BuffersInQueue;
+                                    BufferListItem = ALSource->queue;
+                                    while(BufferListItem != NULL)
+                                    {
+                                        BufferListItem->bufferstate = PROCESSED;
+                                        BufferListItem = BufferListItem->next;
+                                    }
+                                }
+                                else
+                                {
+                                    /* alSourceRewind */
+                                    /* alSourcePlay */
+                                    ALSource->state = AL_PLAYING;
+                                    ALSource->inuse = AL_TRUE;
+                                    ALSource->play = AL_TRUE;
+                                    ALSource->BuffersPlayed = 0;
+                                    ALSource->BufferPosition = 0;
+                                    ALSource->lBytesPlayed = 0;
+                                    ALSource->BuffersProcessed = 0;
+                                    BufferListItem = ALSource->queue;
+                                    while(BufferListItem != NULL)
+                                    {
+                                        BufferListItem->bufferstate = PENDING;
+                                        BufferListItem = BufferListItem->next;
+                                    }
+                                    ALSource->ulBufferID = ALSource->queue->buffer;
+
+                                    ALSource->position = DataPosInt-DataSize;
+                                    ALSource->position_fraction = DataPosFrac;
+                                }
+                            }
+                        }
+                    }
+
+                    //Get source state
+                    State = ALSource->state;
+                }
+
+                ALSource = ALSource->next;
+            }
+
+            //Post processing loop
+            switch(format)
+            {
+                case AL_FORMAT_MONO8:
+                    for(i = 0;i < SamplesToDo;i++)
+                    {
+                        *((ALubyte*)buffer) = (aluF2S(DryBuffer[i][0]+DryBuffer[i][1]+WetBuffer[i][0]+WetBuffer[i][1])>>8)+128;
+                        buffer = ((ALubyte*)buffer) + 1;
+                    }
+                    break;
+                case AL_FORMAT_STEREO8:
+                    for(i = 0;i < SamplesToDo*2;i++)
+                    {
+                        *((ALubyte*)buffer) = (aluF2S(DryBuffer[i>>1][i&1]+WetBuffer[i>>1][i&1])>>8)+128;
+                        buffer = ((ALubyte*)buffer) + 1;
+                    }
+                    break;
+                case AL_FORMAT_QUAD8:
+                    for(i = 0;i < SamplesToDo*4;i++)
+                    {
+                        *((ALubyte*)buffer) = (aluF2S(DryBuffer[i>>2][i&3]+WetBuffer[i>>2][i&3])>>8)+128;
+                        buffer = ((ALubyte*)buffer) + 1;
+                    }
+                    break;
+                case AL_FORMAT_MONO16:
+                    for(i = 0;i < SamplesToDo;i++)
+                    {
+                        *((ALshort*)buffer) = aluF2S(DryBuffer[i][0]+DryBuffer[i][1]+WetBuffer[i][0]+WetBuffer[i][1]);
+                        buffer = ((ALshort*)buffer) + 1;
+                    }
+                    break;
+                case AL_FORMAT_STEREO16:
+                default:
+                    for(i = 0;i < SamplesToDo*2;i++)
+                    {
+                        *((ALshort*)buffer) = aluF2S(DryBuffer[i>>1][i&1]+WetBuffer[i>>1][i&1]);
+                        buffer = ((ALshort*)buffer) + 1;
+                    }
+                    break;
+                case AL_FORMAT_QUAD16:
+                    for(i = 0;i < SamplesToDo*4;i++)
+                    {
+                        *((ALshort*)buffer) = aluF2S(DryBuffer[i>>2][i&3]+WetBuffer[i>>2][i&3]);
+                        buffer = ((ALshort*)buffer) + 1;
+                    }
+                    break;
+            }
+
+            size -= SamplesToDo;
+        }
+    }
+
+    ProcessContext(ALContext);
+}