Added support for 3D virtual surround rendering in ALWrapper

ObjectAL/ObjectAL/OpenAL/ALWrapper.h

@@ -1094,4 +1094,18 @@
  */
 + (bool) asaSourcef:(ALuint) sourceId property:(ALuint) property value:(ALfloat) value;
 
+/** Set the rendering quality of OpenAL to @"high", @"low", or @"headphones" for 3D sound
+ * 
+ * @param quality The quality, one of @"high", @"low", or @"headphones"
+ */
++ (void) setAlcMacOSXRenderingQuality:(NSString *) quality;
+
+/** Get the rendering quality of OpenAL.
+ * 
+ * @return @"high" if rendering quality is ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_HIGH
+ * @return @"low" if rendering quality is ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_LOW
+ * @return @"headphones" if rendering quality is ALC_IPHONE_SPATIAL_RENDERING_QUALITY_HEADPHONES
+ */
++ (NSString *) alcMacOSXRenderingQuality;
+
 @end

ObjectAL/ObjectAL/OpenAL/ALWrapper.m

@@ -1686,4 +1686,31 @@ + (float) getSourceObstruction:(ALuint) sourceID
     return value;
 }
 
++ (void) setAlcMacOSXRenderingQuality:(NSString *) quality {
+  void (*proc)(const ALint) = [ALWrapper getProcAddress:@"alcMacOSXRenderingQuality"];
+  if ([quality isEqualToString:@"high"]) {
+    proc(ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_HIGH);
+  } else if ([quality isEqualToString:@"low"]) {
+    proc(ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_LOW);
+  } else if ([quality isEqualToString:@"headphones"]) {
+    proc(ALC_IPHONE_SPATIAL_RENDERING_QUALITY_HEADPHONES);
+  } else {
+    [NSException raise:@"InvalidArgument" format:@"Unknown Argument - needs to be :high or :low"];
+  }
+}
+
++ (NSString *) alcMacOSXRenderingQuality {
+  ALint (*proc)(void) = [ALWrapper getProcAddress:@"alcMacOSXGetRenderingQuality"];
+  ALint quality = proc();
+  if (quality == ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_HIGH) {
+    return @"high";
+  } else if (quality == ALC_IPHONE_SPATIAL_RENDERING_QUALITY_HEADPHONES) {
+    return @"headphones";
+  } else if (quality == ALC_MAC_OSX_SPATIAL_RENDERING_QUALITY_LOW) {
+    return @"low";
+  } else {
+    return [NSString stringWithFormat:@"%i", quality];
+  }
+}
+
 @end