diff --git a/media/libeffects/testlibs/EffectEqualizer.cpp b/media/libeffects/testlibs/EffectEqualizer.cpp
index 0eb2bdf..a71f236 100644
--- a/media/libeffects/testlibs/EffectEqualizer.cpp
+++ b/media/libeffects/testlibs/EffectEqualizer.cpp
@@ -551,8 +551,8 @@
     return 0;
 }   // end Equalizer_process
 
-extern "C" int Equalizer_command(effect_interface_t self, int cmdCode, int cmdSize,
-        void *pCmdData, int *replySize, void *pReplyData) {
+extern "C" int Equalizer_command(effect_interface_t self, uint32_t cmdCode, uint32_t cmdSize,
+        void *pCmdData, uint32_t *replySize, void *pReplyData) {
 
     android::EqualizerContext * pContext = (android::EqualizerContext *) self;
     int retsize;
diff --git a/media/libeffects/testlibs/EffectReverb.c b/media/libeffects/testlibs/EffectReverb.c
index 3f9069f..3eb8b2c 100644
--- a/media/libeffects/testlibs/EffectReverb.c
+++ b/media/libeffects/testlibs/EffectReverb.c
@@ -270,8 +270,8 @@
 }
 
 
-static int Reverb_Command(effect_interface_t self, int cmdCode, int cmdSize,
-        void *pCmdData, int *replySize, void *pReplyData) {
+static int Reverb_Command(effect_interface_t self, uint32_t cmdCode, uint32_t cmdSize,
+        void *pCmdData, uint32_t *replySize, void *pReplyData) {
     reverb_module_t *pRvbModule = (reverb_module_t *) self;
     reverb_object_t *pReverb;
     int retsize;
diff --git a/media/libeffects/testlibs/EffectReverb.h b/media/libeffects/testlibs/EffectReverb.h
index ee8e390..dbcd192 100644
--- a/media/libeffects/testlibs/EffectReverb.h
+++ b/media/libeffects/testlibs/EffectReverb.h
@@ -301,12 +301,23 @@
  *------------------------------------
 */
 int EffectQueryNumberEffects(uint32_t *pNumEffects);
-int EffectQueryEffect(uint32_t index, effect_descriptor_t *pDescriptor);
-int EffectCreate(effect_uuid_t *effectUID, int32_t sessionId, int32_t ioId, effect_interface_t *pInterface);
+int EffectQueryEffect(uint32_t index,
+                      effect_descriptor_t *pDescriptor);
+int EffectCreate(effect_uuid_t *effectUID,
+                 int32_t sessionId,
+                 int32_t ioId,
+                 effect_interface_t *pInterface);
 int EffectRelease(effect_interface_t interface);
 
-static int Reverb_Process(effect_interface_t self, audio_buffer_t *inBuffer, audio_buffer_t *outBuffer);
-static int Reverb_Command(effect_interface_t self, int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData);
+static int Reverb_Process(effect_interface_t self,
+                          audio_buffer_t *inBuffer,
+                          audio_buffer_t *outBuffer);
+static int Reverb_Command(effect_interface_t self,
+                          uint32_t cmdCode,
+                          uint32_t cmdSize,
+                          void *pCmdData,
+                          uint32_t *replySize,
+                          void *pReplyData);
 
 
 /*------------------------------------