dsound: Support getting and setting EAX buffer properties.

dlls/dsound/buffer.c

@@ -1127,6 +1127,8 @@ HRESULT secondarybuffer_create(DirectSoundDevice *device, const DSBUFFERDESC *ds
 		return DSERR_OUTOFMEMORY;
 	}
 
+	dsb->eax.reverb_mix = EAX_REVERBMIX_USEDISTANCE;
+
 	if (dsb->dsbd.dwFlags & DSBCAPS_CTRL3D) {
 		dsb->ds3db_ds3db.dwSize = sizeof(DS3DBUFFER);
 		dsb->ds3db_ds3db.vPosition.x = 0.0;

dlls/dsound/dsound_eax.h

@@ -119,6 +119,10 @@ typedef struct {
     EFXEAXREVERBPROPERTIES eax_props;
 } eax_info;
 
+typedef struct {
+    float reverb_mix;
+} eax_buffer_info;
+
 #ifdef __cplusplus
 }
 #endif

dlls/dsound/dsound_private.h

@@ -177,6 +177,8 @@ struct IDirectSoundBufferImpl
     int                         num_filters;
     DSFilter*                   filters;
 
+    eax_buffer_info             eax;
+
     struct list entry;
 };
 

dlls/dsound/eax.c

@@ -179,6 +179,38 @@ HRESULT WINAPI EAX_Get(IDirectSoundBufferImpl *buf, REFGUID guidPropSet,
         }
 
         return S_OK;
+    } else if (IsEqualGUID(&DSPROPSETID_EAXBUFFER_ReverbProperties, guidPropSet)) {
+        EAXBUFFER_REVERBPROPERTIES *props;
+
+        if (!buf->device->eax.using_eax)
+            init_eax(buf->device);
+
+        switch (dwPropID) {
+            case DSPROPERTY_EAXBUFFER_ALL:
+                if (cbPropData < sizeof(EAXBUFFER_REVERBPROPERTIES))
+                    return E_FAIL;
+
+                props = pPropData;
+
+                props->fMix = buf->eax.reverb_mix;
+
+                *pcbReturned = sizeof(EAXBUFFER_REVERBPROPERTIES);
+            break;
+
+            case DSPROPERTY_EAXBUFFER_REVERBMIX:
+                if (cbPropData < sizeof(float))
+                    return E_FAIL;
+
+                *(float*)pPropData = buf->eax.reverb_mix;
+
+                *pcbReturned = sizeof(float);
+            break;
+
+            default:
+                return E_PROP_ID_UNSUPPORTED;
+        }
+
+        return S_OK;
     }
 
     return E_PROP_ID_UNSUPPORTED;
@@ -276,6 +308,38 @@ HRESULT WINAPI EAX_Set(IDirectSoundBufferImpl *buf, REFGUID guidPropSet,
         }
 
         return S_OK;
+    } else if (IsEqualGUID(&DSPROPSETID_EAXBUFFER_ReverbProperties, guidPropSet)) {
+        EAXBUFFER_REVERBPROPERTIES *props;
+
+        if (!buf->device->eax.using_eax)
+            init_eax(buf->device);
+
+        switch (dwPropID) {
+            case DSPROPERTY_EAXBUFFER_ALL:
+                if (cbPropData != sizeof(EAXBUFFER_REVERBPROPERTIES))
+                    return E_FAIL;
+
+                props = pPropData;
+
+                TRACE("setting reverb mix to %f\n", props->fMix);
+
+                buf->eax.reverb_mix = props->fMix;
+            break;
+
+            case DSPROPERTY_EAXBUFFER_REVERBMIX:
+                if (cbPropData != sizeof(float))
+                    return E_FAIL;
+
+                TRACE("setting reverb mix to %f\n", *(float*)pPropData);
+
+                buf->eax.reverb_mix = *(float*)pPropData;
+            break;
+
+            default:
+                return E_PROP_ID_UNSUPPORTED;
+        }
+
+        return S_OK;
     }
 
     return E_PROP_ID_UNSUPPORTED;