From a9d9553fff7f3ec571770a9b4a22c5a46f91780f Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sat, 21 May 2011 17:45:54 -0700
Subject: Use a multi-dimensional array for the panning LUT

---
 Alc/ALu.c          |  6 +++---
 Alc/alcDedicated.c |  2 +-
 Alc/alcReverb.c    |  4 ++--
 Alc/panning.c      | 19 +++++++++----------
 4 files changed, 15 insertions(+), 16 deletions(-)

(limited to 'Alc')

diff --git a/Alc/ALu.c b/Alc/ALu.c
index cd0c2177..b387d7e1 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -188,7 +188,7 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
             {
                 pos = aluCart2LUTpos(cos(angles_StereoDup[c] * (M_PI/180.0)),
                                      sin(angles_StereoDup[c] * (M_PI/180.0)));
-                SpeakerGain = &Device->PanningLUT[MAXCHANNELS * pos];
+                SpeakerGain = Device->PanningLUT[pos];
 
                 for(i = 0;i < (ALint)Device->NumChan;i++)
                 {
@@ -266,7 +266,7 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
                 }
                 pos = aluCart2LUTpos(cos(angles[c] * (M_PI/180.0)),
                                      sin(angles[c] * (M_PI/180.0)));
-                SpeakerGain = &Device->PanningLUT[MAXCHANNELS * pos];
+                SpeakerGain = Device->PanningLUT[pos];
 
                 for(i = 0;i < (ALint)Device->NumChan;i++)
                 {
@@ -692,7 +692,7 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
         }
 
         pos = aluCart2LUTpos(-Position[2]*ZScale, Position[0]);
-        SpeakerGain = &Device->PanningLUT[MAXCHANNELS * pos];
+        SpeakerGain = Device->PanningLUT[pos];
 
         DirGain = aluSqrt(Position[0]*Position[0] + Position[2]*Position[2]);
         // elevation adjustment for directional gain. this sucks, but
diff --git a/Alc/alcDedicated.c b/Alc/alcDedicated.c
index 0b9d8419..6bab83e5 100644
--- a/Alc/alcDedicated.c
+++ b/Alc/alcDedicated.c
@@ -59,7 +59,7 @@ static ALvoid DedicatedDLGUpdate(ALeffectState *effect, ALCcontext *Context, con
     ALsizei s;
 
     pos = aluCart2LUTpos(1.0f, 0.0f);
-    SpeakerGain = &device->PanningLUT[MAXCHANNELS * pos];
+    SpeakerGain = device->PanningLUT[pos];
 
     for(s = 0;s < MAXCHANNELS;s++)
         state->gains[s] = SpeakerGain[s] * Effect->Params.Dedicated.Gain;
diff --git a/Alc/alcReverb.c b/Alc/alcReverb.c
index 4ecf615e..20638710 100644
--- a/Alc/alcReverb.c
+++ b/Alc/alcReverb.c
@@ -627,7 +627,7 @@ static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *Reflection
      * panning direction.
      */
     pos = aluCart2LUTpos(earlyPan[2], earlyPan[0]);
-    speakerGain = &Device->PanningLUT[MAXCHANNELS * pos];
+    speakerGain = Device->PanningLUT[pos];
     dirGain = aluSqrt((earlyPan[0] * earlyPan[0]) + (earlyPan[2] * earlyPan[2]));
 
     for(index = 0;index < MAXCHANNELS;index++)
@@ -640,7 +640,7 @@ static ALvoid Update3DPanning(const ALCdevice *Device, const ALfloat *Reflection
 
 
     pos = aluCart2LUTpos(latePan[2], latePan[0]);
-    speakerGain = &Device->PanningLUT[MAXCHANNELS * pos];
+    speakerGain = Device->PanningLUT[pos];
     dirGain = aluSqrt((latePan[0] * latePan[0]) + (latePan[2] * latePan[2]));
 
     for(index = 0;index < MAXCHANNELS;index++)
diff --git a/Alc/panning.c b/Alc/panning.c
index b5352e2b..a5a92298 100644
--- a/Alc/panning.c
+++ b/Alc/panning.c
@@ -168,8 +168,7 @@ ALvoid aluInitPanning(ALCdevice *Device)
     ALfloat SpeakerAngle[MAXCHANNELS];
     Channel *Speaker2Chan;
     ALfloat Alpha, Theta;
-    ALfloat *PanningLUT;
-    ALint pos, offset;
+    ALint pos;
     ALuint s;
 
     Speaker2Chan = Device->Speaker2Chan;
@@ -255,17 +254,17 @@ ALvoid aluInitPanning(ALCdevice *Device)
             break;
     }
 
-    PanningLUT = Device->PanningLUT;
     for(pos = 0; pos < LUT_NUM; pos++)
     {
+        ALfloat *PanningLUT = Device->PanningLUT[pos];
+
         /* clear all values */
-        offset = MAXCHANNELS * pos;
         for(s = 0; s < MAXCHANNELS; s++)
-            PanningLUT[offset+s] = 0.0f;
+            PanningLUT[s] = 0.0f;
 
         if(Device->NumChan == 1)
         {
-            PanningLUT[offset + Speaker2Chan[0]] = 1.0f;
+            PanningLUT[Speaker2Chan[0]] = 1.0f;
             continue;
         }
 
@@ -280,8 +279,8 @@ ALvoid aluInitPanning(ALCdevice *Device)
                 /* source between speaker s and speaker s+1 */
                 Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) /
                                  (SpeakerAngle[s+1]-SpeakerAngle[s]);
-                PanningLUT[offset + Speaker2Chan[s]]   = cos(Alpha);
-                PanningLUT[offset + Speaker2Chan[s+1]] = sin(Alpha);
+                PanningLUT[Speaker2Chan[s]]   = cos(Alpha);
+                PanningLUT[Speaker2Chan[s+1]] = sin(Alpha);
                 break;
             }
         }
@@ -292,8 +291,8 @@ ALvoid aluInitPanning(ALCdevice *Device)
                 Theta += 2.0f * M_PI;
             Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) /
                              (2.0f * M_PI + SpeakerAngle[0]-SpeakerAngle[s]);
-            PanningLUT[offset + Speaker2Chan[s]] = cos(Alpha);
-            PanningLUT[offset + Speaker2Chan[0]] = sin(Alpha);
+            PanningLUT[Speaker2Chan[s]] = cos(Alpha);
+            PanningLUT[Speaker2Chan[0]] = sin(Alpha);
         }
     }
 }
-- 
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