diff --git a/include/media/AudioEffect.h b/include/media/AudioEffect.h
index e9ff8a3..c967efb 100644
--- a/include/media/AudioEffect.h
+++ b/include/media/AudioEffect.h
@@ -382,10 +382,10 @@
       *     See EffectApi.h for details on effect command() function, valid command codes
       *     and formats.
       */
-     virtual status_t command(int32_t cmdCode,
-                              int32_t cmdSize,
+     virtual status_t command(uint32_t cmdCode,
+                              uint32_t cmdSize,
                               void *cmdData,
-                              int32_t *replySize,
+                              uint32_t *replySize,
                               void *replyData);
 
 
@@ -429,10 +429,10 @@
         virtual void enableStatusChanged(bool enabled) {
             mEffect->enableStatusChanged(enabled);
         }
-        virtual void commandExecuted(int cmdCode,
-                                     int cmdSize,
+        virtual void commandExecuted(uint32_t cmdCode,
+                                     uint32_t cmdSize,
                                      void *pCmdData,
-                                     int replySize,
+                                     uint32_t replySize,
                                      void *pReplyData) {
             mEffect->commandExecuted(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
         }
@@ -450,7 +450,11 @@
     // IEffectClient
     void controlStatusChanged(bool controlGranted);
     void enableStatusChanged(bool enabled);
-    void commandExecuted(int cmdCode, int cmdSize, void *pCmdData, int replySize, void *pReplyData);
+    void commandExecuted(uint32_t cmdCode,
+                         uint32_t cmdSize,
+                         void *pCmdData,
+                         uint32_t replySize,
+                         void *pReplyData);
     void binderDied();
 
 
diff --git a/include/media/EffectApi.h b/include/media/EffectApi.h
index 8c120e5..16fb43c 100644
--- a/include/media/EffectApi.h
+++ b/include/media/EffectApi.h
@@ -284,10 +284,10 @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 typedef int32_t (*effect_command_t)(effect_interface_t self,
-                                    int32_t cmdCode,
-                                    int32_t cmdSize,
+                                    uint32_t cmdCode,
+                                    uint32_t cmdSize,
                                     void *pCmdData,
-                                    int32_t *replySize,
+                                    uint32_t *replySize,
                                     void *pReplyData);
 
 
diff --git a/include/media/IEffect.h b/include/media/IEffect.h
index 6dad393..ff04869 100644
--- a/include/media/IEffect.h
+++ b/include/media/IEffect.h
@@ -33,7 +33,11 @@
 
     virtual status_t disable() = 0;
 
-    virtual status_t command(int cmdCode, int cmdSize, void *pCmdData, int *pReplySize, void *pReplyData) = 0;
+    virtual status_t command(uint32_t cmdCode,
+                             uint32_t cmdSize,
+                             void *pCmdData,
+                             uint32_t *pReplySize,
+                             void *pReplyData) = 0;
 
     virtual void disconnect() = 0;
 
diff --git a/include/media/IEffectClient.h b/include/media/IEffectClient.h
index d22daf8..2f78c98 100644
--- a/include/media/IEffectClient.h
+++ b/include/media/IEffectClient.h
@@ -31,7 +31,11 @@
 
     virtual void controlStatusChanged(bool controlGranted) = 0;
     virtual void enableStatusChanged(bool enabled) = 0;
-    virtual void commandExecuted(int cmdCode, int cmdSize, void *pCmdData, int replySize, void *pReplyData) = 0;
+    virtual void commandExecuted(uint32_t cmdCode,
+                                 uint32_t cmdSize,
+                                 void *pCmdData,
+                                 uint32_t replySize,
+                                 void *pReplyData) = 0;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/media/jni/audioeffect/android_media_AudioEffect.cpp b/media/jni/audioeffect/android_media_AudioEffect.cpp
index e3b9e36..8d9f4fe 100644
--- a/media/jni/audioeffect/android_media_AudioEffect.cpp
+++ b/media/jni/audioeffect/android_media_AudioEffect.cpp
@@ -698,8 +698,11 @@
         }
     }
 
-    lStatus = translateError(lpAudioEffect->command(cmdCode, cmdSize, pCmdData,
-            pReplySize, pReplyData));
+    lStatus = translateError(lpAudioEffect->command((uint32_t)cmdCode,
+                                                    (uint32_t)cmdSize,
+                                                    pCmdData,
+                                                    (uint32_t *)pReplySize,
+                                                    pReplyData));
 
 command_Exit:
 
diff --git a/media/libeffects/factory/EffectsFactory.c b/media/libeffects/factory/EffectsFactory.c
index 0be280c..c19a505 100644
--- a/media/libeffects/factory/EffectsFactory.c
+++ b/media/libeffects/factory/EffectsFactory.c
@@ -73,7 +73,12 @@
     return ret;
 }
 
-int Effect_Command(effect_interface_t self, int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData)
+int Effect_Command(effect_interface_t self,
+                   uint32_t cmdCode,
+                   uint32_t cmdSize,
+                   void *pCmdData,
+                   uint32_t *replySize,
+                   void *pReplyData)
 {
     int ret = init();
     if (ret < 0) {
diff --git a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
index 4440447..4c3ebca 100644
--- a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
+++ b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
@@ -2348,10 +2348,10 @@
 
 /* Effect Control Interface Implementation: Command */
 extern "C" int Effect_command(effect_interface_t  self,
-                              int                 cmdCode,
-                              int                 cmdSize,
+                              uint32_t            cmdCode,
+                              uint32_t            cmdSize,
                               void                *pCmdData,
-                              int                 *replySize,
+                              uint32_t            *replySize,
                               void                *pReplyData){
     EffectContext * pContext = (EffectContext *) self;
     int retsize;
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);
 
 
 /*------------------------------------
diff --git a/media/libeffects/visualizer/EffectVisualizer.cpp b/media/libeffects/visualizer/EffectVisualizer.cpp
index ec13557..8ab57c93 100644
--- a/media/libeffects/visualizer/EffectVisualizer.cpp
+++ b/media/libeffects/visualizer/EffectVisualizer.cpp
@@ -272,8 +272,8 @@
     return 0;
 }   // end Visualizer_process
 
-extern "C" int Visualizer_command(effect_interface_t self, int cmdCode, int cmdSize,
-        void *pCmdData, int *replySize, void *pReplyData) {
+extern "C" int Visualizer_command(effect_interface_t self, uint32_t cmdCode, uint32_t cmdSize,
+        void *pCmdData, uint32_t *replySize, void *pReplyData) {
 
     android::VisualizerContext * pContext = (android::VisualizerContext *)self;
     int retsize;
diff --git a/media/libmedia/AudioEffect.cpp b/media/libmedia/AudioEffect.cpp
index df0f73b..3cdf48a 100644
--- a/media/libmedia/AudioEffect.cpp
+++ b/media/libmedia/AudioEffect.cpp
@@ -221,7 +221,11 @@
     return INVALID_OPERATION;
 }
 
-status_t AudioEffect::command(int32_t cmdCode, int32_t cmdSize, void *cmdData, int32_t *replySize, void *replyData)
+status_t AudioEffect::command(uint32_t cmdCode,
+                              uint32_t cmdSize,
+                              void *cmdData,
+                              uint32_t *replySize,
+                              void *replyData)
 {
     if (mStatus != NO_ERROR && mStatus != ALREADY_EXISTS) {
         return INVALID_OPERATION;
@@ -241,8 +245,8 @@
         return BAD_VALUE;
     }
 
-    int size = sizeof(int);
-    int psize = ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) + param->vsize;
+    uint32_t size = sizeof(int);
+    uint32_t psize = ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) + param->vsize;
 
     LOGV("setParameter: param: %d, param2: %d", *(int *)param->data, (param->psize == 8) ? *((int *)param->data + 1): -1);
 
@@ -285,7 +289,7 @@
     if (mCblk->clientIndex == 0) {
         return INVALID_OPERATION;
     }
-    int size = 0;
+    uint32_t size = 0;
     return mIEffect->command(EFFECT_CMD_SET_PARAM_COMMIT, 0, NULL, &size, NULL);
 }
 
@@ -301,7 +305,7 @@
 
     LOGV("getParameter: param: %d, param2: %d", *(int *)param->data, (param->psize == 8) ? *((int *)param->data + 1): -1);
 
-    int psize = sizeof(effect_param_t) + ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) + param->vsize;
+    uint32_t psize = sizeof(effect_param_t) + ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) + param->vsize;
 
     return mIEffect->command(EFFECT_CMD_GET_PARAM, sizeof(effect_param_t) + param->psize, param, &psize, param);
 }
@@ -350,7 +354,11 @@
     }
 }
 
-void AudioEffect::commandExecuted(int cmdCode, int cmdSize, void *cmdData, int replySize, void *replyData)
+void AudioEffect::commandExecuted(uint32_t cmdCode,
+                                  uint32_t cmdSize,
+                                  void *cmdData,
+                                  uint32_t replySize,
+                                  void *replyData)
 {
     if (cmdData == NULL || replyData == NULL) {
         return;
diff --git a/media/libmedia/IEffect.cpp b/media/libmedia/IEffect.cpp
index 8e3ac71..a945b97 100644
--- a/media/libmedia/IEffect.cpp
+++ b/media/libmedia/IEffect.cpp
@@ -59,7 +59,11 @@
         return reply.readInt32();
     }
 
-    status_t command(int cmdCode, int cmdSize, void *pCmdData, int *pReplySize, void *pReplyData)
+    status_t command(uint32_t cmdCode,
+                     uint32_t cmdSize,
+                     void *pCmdData,
+                     uint32_t *pReplySize,
+                     void *pReplyData)
     {
         LOGV("command");
         Parcel data, reply;
@@ -136,15 +140,15 @@
         case COMMAND: {
             LOGV("COMMAND");
             CHECK_INTERFACE(IEffect, data, reply);
-            int cmdCode = data.readInt32();
-            int cmdSize = data.readInt32();
+            uint32_t cmdCode = data.readInt32();
+            uint32_t cmdSize = data.readInt32();
             char *cmd = NULL;
             if (cmdSize) {
                 cmd = (char *)malloc(cmdSize);
                 data.read(cmd, cmdSize);
             }
-            int replySize = data.readInt32();
-            int replySz = replySize;
+            uint32_t replySize = data.readInt32();
+            uint32_t replySz = replySize;
             char *resp = NULL;
             if (replySize) {
                 resp = (char *)malloc(replySize);
diff --git a/media/libmedia/IEffectClient.cpp b/media/libmedia/IEffectClient.cpp
index e7659ae..1fa9cbe 100644
--- a/media/libmedia/IEffectClient.cpp
+++ b/media/libmedia/IEffectClient.cpp
@@ -56,7 +56,11 @@
         remote()->transact(ENABLE_STATUS_CHANGED, data, &reply, IBinder::FLAG_ONEWAY);
     }
 
-    void commandExecuted(int cmdCode, int cmdSize, void *pCmdData, int replySize, void *pReplyData)
+    void commandExecuted(uint32_t cmdCode,
+                         uint32_t cmdSize,
+                         void *pCmdData,
+                         uint32_t replySize,
+                         void *pReplyData)
     {
         LOGV("commandExecuted");
         Parcel data, reply;
@@ -108,14 +112,14 @@
         case COMMAND_EXECUTED: {
             LOGV("COMMAND_EXECUTED");
             CHECK_INTERFACE(IEffectClient, data, reply);
-            int cmdCode = data.readInt32();
-            int cmdSize = data.readInt32();
+            uint32_t cmdCode = data.readInt32();
+            uint32_t cmdSize = data.readInt32();
             char *cmd = NULL;
             if (cmdSize) {
                 cmd = (char *)malloc(cmdSize);
                 data.read(cmd, cmdSize);
             }
-            int replySize = data.readInt32();
+            uint32_t replySize = data.readInt32();
             char *resp = NULL;
             if (replySize) {
                 resp = (char *)malloc(replySize);
diff --git a/media/libmedia/Visualizer.cpp b/media/libmedia/Visualizer.cpp
index 47e96e5..32cdb49 100644
--- a/media/libmedia/Visualizer.cpp
+++ b/media/libmedia/Visualizer.cpp
@@ -184,7 +184,7 @@
 
     status_t status = NO_ERROR;
     if (mEnabled) {
-        int32_t replySize = mCaptureSize;
+        uint32_t replySize = mCaptureSize;
         status_t status = command(VISU_CMD_CAPTURE, 0, NULL, &replySize, waveform);
         if (replySize == 0) {
             status = NOT_ENOUGH_DATA;
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index b88e69d..3572d10 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -5408,8 +5408,13 @@
             this, thread.get(), mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
 
     status_t cmdStatus;
-    int size = sizeof(int);
-    status_t status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_CONFIGURE, sizeof(effect_config_t), &mConfig, &size, &cmdStatus);
+    uint32_t size = sizeof(int);
+    status_t status = (*mEffectInterface)->command(mEffectInterface,
+                                                   EFFECT_CMD_CONFIGURE,
+                                                   sizeof(effect_config_t),
+                                                   &mConfig,
+                                                   &size,
+                                                   &cmdStatus);
     if (status == 0) {
         status = cmdStatus;
     }
@@ -5427,8 +5432,13 @@
         return NO_INIT;
     }
     status_t cmdStatus;
-    int size = sizeof(status_t);
-    status_t status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_INIT, 0, NULL, &size, &cmdStatus);
+    uint32_t size = sizeof(status_t);
+    status_t status = (*mEffectInterface)->command(mEffectInterface,
+                                                   EFFECT_CMD_INIT,
+                                                   0,
+                                                   NULL,
+                                                   &size,
+                                                   &cmdStatus);
     if (status == 0) {
         status = cmdStatus;
     }
@@ -5441,8 +5451,13 @@
         return NO_INIT;
     }
     status_t cmdStatus;
-    int size = sizeof(status_t);
-    status_t status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_ENABLE, 0, NULL, &size, &cmdStatus);
+    uint32_t size = sizeof(status_t);
+    status_t status = (*mEffectInterface)->command(mEffectInterface,
+                                                   EFFECT_CMD_ENABLE,
+                                                   0,
+                                                   NULL,
+                                                   &size,
+                                                   &cmdStatus);
     if (status == 0) {
         status = cmdStatus;
     }
@@ -5455,15 +5470,24 @@
         return NO_INIT;
     }
     status_t cmdStatus;
-    int size = sizeof(status_t);
-    status_t status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_DISABLE, 0, NULL, &size, &cmdStatus);
+    uint32_t size = sizeof(status_t);
+    status_t status = (*mEffectInterface)->command(mEffectInterface,
+                                                   EFFECT_CMD_DISABLE,
+                                                   0,
+                                                   NULL,
+                                                   &size,
+                                                   &cmdStatus);
     if (status == 0) {
         status = cmdStatus;
     }
     return status;
 }
 
-status_t AudioFlinger::EffectModule::command(int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData)
+status_t AudioFlinger::EffectModule::command(uint32_t cmdCode,
+                                             uint32_t cmdSize,
+                                             void *pCmdData,
+                                             uint32_t *replySize,
+                                             void *pReplyData)
 {
     Mutex::Autolock _l(mLock);
 //    LOGV("command(), cmdCode: %d, mEffectInterface: %p", cmdCode, mEffectInterface);
@@ -5471,9 +5495,14 @@
     if (mEffectInterface == NULL) {
         return NO_INIT;
     }
-    status_t status = (*mEffectInterface)->command(mEffectInterface, cmdCode, cmdSize, pCmdData, replySize, pReplyData);
+    status_t status = (*mEffectInterface)->command(mEffectInterface,
+                                                   cmdCode,
+                                                   cmdSize,
+                                                   pCmdData,
+                                                   replySize,
+                                                   pReplyData);
     if (cmdCode != EFFECT_CMD_GET_PARAM && status == NO_ERROR) {
-        int size = (replySize == NULL) ? 0 : *replySize;
+        uint32_t size = (replySize == NULL) ? 0 : *replySize;
         for (size_t i = 1; i < mHandles.size(); i++) {
             sp<EffectHandle> h = mHandles[i].promote();
             if (h != 0) {
@@ -5549,13 +5578,18 @@
         status_t cmdStatus;
         uint32_t volume[2];
         uint32_t *pVolume = NULL;
-        int size = sizeof(volume);
+        uint32_t size = sizeof(volume);
         volume[0] = *left;
         volume[1] = *right;
         if (controller) {
             pVolume = volume;
         }
-        status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_SET_VOLUME, size, volume, &size, pVolume);
+        status = (*mEffectInterface)->command(mEffectInterface,
+                                              EFFECT_CMD_SET_VOLUME,
+                                              size,
+                                              volume,
+                                              &size,
+                                              pVolume);
         if (controller && status == NO_ERROR && size == sizeof(volume)) {
             *left = volume[0];
             *right = volume[1];
@@ -5575,8 +5609,13 @@
             return BAD_VALUE;
         }
         status_t cmdStatus;
-        int size = sizeof(status_t);
-        status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_SET_DEVICE, sizeof(uint32_t), &device, &size, &cmdStatus);
+        uint32_t size = sizeof(status_t);
+        status = (*mEffectInterface)->command(mEffectInterface,
+                                              EFFECT_CMD_SET_DEVICE,
+                                              sizeof(uint32_t),
+                                              &device,
+                                              &size,
+                                              &cmdStatus);
         if (status == NO_ERROR) {
             status = cmdStatus;
         }
@@ -5595,8 +5634,13 @@
             return BAD_VALUE;
         }
         status_t cmdStatus;
-        int size = sizeof(status_t);
-        status = (*mEffectInterface)->command(mEffectInterface, EFFECT_CMD_SET_AUDIO_MODE, sizeof(int), &effectMode, &size, &cmdStatus);
+        uint32_t size = sizeof(status_t);
+        status = (*mEffectInterface)->command(mEffectInterface,
+                                              EFFECT_CMD_SET_AUDIO_MODE,
+                                              sizeof(int),
+                                              &effectMode,
+                                              &size,
+                                              &cmdStatus);
         if (status == NO_ERROR) {
             status = cmdStatus;
         }
@@ -5805,9 +5849,14 @@
     }
 }
 
-status_t AudioFlinger::EffectHandle::command(int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData)
+status_t AudioFlinger::EffectHandle::command(uint32_t cmdCode,
+                                             uint32_t cmdSize,
+                                             void *pCmdData,
+                                             uint32_t *replySize,
+                                             void *pReplyData)
 {
-//    LOGV("command(), cmdCode: %d, mHasControl: %d, mEffect: %p", cmdCode, mHasControl, (mEffect == 0) ? 0 : mEffect.get());
+//    LOGV("command(), cmdCode: %d, mHasControl: %d, mEffect: %p",
+//              cmdCode, mHasControl, (mEffect == 0) ? 0 : mEffect.get());
 
     // only get parameter command is permitted for applications not controlling the effect
     if (!mHasControl && cmdCode != EFFECT_CMD_GET_PARAM) {
@@ -5829,7 +5878,7 @@
         status_t status = NO_ERROR;
         while (mCblk->serverIndex < mCblk->clientIndex) {
             int reply;
-            int rsize = sizeof(int);
+            uint32_t rsize = sizeof(int);
             int *p = (int *)(mBuffer + mCblk->serverIndex);
             int size = *p++;
             if (((uint8_t *)p + size) > mBuffer + mCblk->clientIndex) {
@@ -5842,8 +5891,14 @@
                 mCblk->serverIndex += size;
                 continue;
             }
-            int psize = sizeof(effect_param_t) + ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) + param->vsize;
-            status_t ret = mEffect->command(EFFECT_CMD_SET_PARAM, psize, p, &rsize, &reply);
+            uint32_t psize = sizeof(effect_param_t) +
+                             ((param->psize - 1) / sizeof(int) + 1) * sizeof(int) +
+                             param->vsize;
+            status_t ret = mEffect->command(EFFECT_CMD_SET_PARAM,
+                                            psize,
+                                            p,
+                                            &rsize,
+                                            &reply);
             if (ret == NO_ERROR) {
                 if (reply != NO_ERROR) {
                     status = reply;
@@ -5879,7 +5934,11 @@
     }
 }
 
-void AudioFlinger::EffectHandle::commandExecuted(int cmdCode, int cmdSize, void *pCmdData, int replySize, void *pReplyData)
+void AudioFlinger::EffectHandle::commandExecuted(uint32_t cmdCode,
+                                                 uint32_t cmdSize,
+                                                 void *pCmdData,
+                                                 uint32_t replySize,
+                                                 void *pReplyData)
 {
     if (mEffectClient != 0) {
         mEffectClient->commandExecuted(cmdCode, cmdSize, pCmdData, replySize, pReplyData);
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index a8c9a92..8f667a3 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -933,7 +933,11 @@
         int         id() { return mId; }
         void process();
         void updateState();
-        status_t command(int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData);
+        status_t command(uint32_t cmdCode,
+                         uint32_t cmdSize,
+                         void *pCmdData,
+                         uint32_t *replySize,
+                         void *pReplyData);
 
         void reset_l();
         status_t configure();
@@ -1023,7 +1027,11 @@
         // IEffect
         virtual status_t enable();
         virtual status_t disable();
-        virtual status_t command(int cmdCode, int cmdSize, void *pCmdData, int *replySize, void *pReplyData);
+        virtual status_t command(uint32_t cmdCode,
+                                 uint32_t cmdSize,
+                                 void *pCmdData,
+                                 uint32_t *replySize,
+                                 void *pReplyData);
         virtual void disconnect();
         virtual sp<IMemory> getCblk() const;
         virtual status_t onTransact(uint32_t code, const Parcel& data,
@@ -1032,7 +1040,11 @@
 
         // Give or take control of effect module
         void setControl(bool hasControl, bool signal);
-        void commandExecuted(int cmdCode, int cmdSize, void *pCmdData, int replySize, void *pReplyData);
+        void commandExecuted(uint32_t cmdCode,
+                             uint32_t cmdSize,
+                             void *pCmdData,
+                             uint32_t replySize,
+                             void *pReplyData);
         void setEnabled(bool enabled);
 
         // Getters