Add an option to emulate EAX reverb using standard reverb

4 files changed, 12 insertions, 1 deletions

diff --git a/Alc/ALc.c b/Alc/ALc.c
index d416e413..905fee22 100644
--- a/Alc/ALc.c
+++ b/Alc/ALc.c
@@ -566,6 +566,7 @@ static void alc_initconfig(void)
 
     ReverbBoost *= aluPow(10.0f, GetConfigValueFloat("reverb", "boost", 0.0f) /
                                  20.0f);
+    EmulateEAXReverb = GetConfigValueBool("reverb", "emulate-eax", AL_FALSE);
 
     devs = GetConfigValue(NULL, "drivers", "");
     if(devs[0])
diff --git a/Alc/alcReverb.c b/Alc/alcReverb.c
index 4b7aa1c4..4f9360b8 100644
--- a/Alc/alcReverb.c
+++ b/Alc/alcReverb.c
@@ -140,6 +140,9 @@ typedef struct ALverbState {
  */
 ALfloat ReverbBoost = 1.0f;
 
+/* Specifies whether to use a standard reverb effect in place of EAX reverb */
+ALboolean EmulateEAXReverb = AL_FALSE;
+
 /* This coefficient is used to define the maximum frequency range controlled
  * by the modulation depth.  The current value of 0.1 will allow it to swing
  * from 0.9x to 1.1x.  This value must be below 1.  At 1 it will cause the
@@ -1364,7 +1367,7 @@ ALeffectState *VerbCreate(void)
 ALeffectState *EAXVerbCreate(void)
 {
     ALeffectState *State = VerbCreate();
-    if(State)
+    if(State && EmulateEAXReverb == AL_FALSE)
     {
         State->DeviceUpdate = EAXVerbDeviceUpdate;
         State->Update = EAXVerbUpdate;
diff --git a/OpenAL32/Include/alEffect.h b/OpenAL32/Include/alEffect.h
index 252490a9..f5274d4a 100644
--- a/OpenAL32/Include/alEffect.h
+++ b/OpenAL32/Include/alEffect.h
@@ -19,6 +19,7 @@ enum {
 extern ALboolean DisabledEffects[MAX_EFFECTS];
 
 extern ALfloat ReverbBoost;
+extern ALboolean EmulateEAXReverb;
 
 typedef struct ALeffect
 {
diff --git a/alsoftrc.sample b/alsoftrc.sample
index 0b97b357..9ea4af15 100644
--- a/alsoftrc.sample
+++ b/alsoftrc.sample
@@ -162,6 +162,12 @@
 #  value of 0 means no change.
 #boost = 0
 
+## emulate-eax:
+#  Allows the standard reverb effect to be used in place of EAX reverb. EAX
+#  reverb processing is a bit more CPU intensive than standard, so this option
+#  allows a simpler effect to be used at the loss of some quality.
+#emulate-eax = false
+
 ##
 ## ALSA backend stuff
 ##