-VLC_EXPORT( int, aout_VolumeGet, ( aout_instance_t *, audio_volume_t * ) );
-VLC_EXPORT( int, aout_VolumeSet, ( aout_instance_t *, audio_volume_t ) );
-VLC_EXPORT( int, aout_VolumeInfos, ( aout_instance_t *, audio_volume_t * ) );
-VLC_EXPORT( int, aout_VolumeUp, ( aout_instance_t *, int, audio_volume_t * ) );
-VLC_EXPORT( int, aout_VolumeDown, ( aout_instance_t *, int, audio_volume_t * ) );
-VLC_EXPORT( int, aout_VolumeMute, ( aout_instance_t *, audio_volume_t * ) );
+#define aout_VolumeGet(a, b) __aout_VolumeGet(VLC_OBJECT(a), b)
+VLC_EXPORT( int, __aout_VolumeGet, ( vlc_object_t *, audio_volume_t * ) );
+#define aout_VolumeSet(a, b) __aout_VolumeSet(VLC_OBJECT(a), b)
+VLC_EXPORT( int, __aout_VolumeSet, ( vlc_object_t *, audio_volume_t ) );
+#define aout_VolumeInfos(a, b) __aout_VolumeInfos(VLC_OBJECT(a), b)
+VLC_EXPORT( int, __aout_VolumeInfos, ( vlc_object_t *, audio_volume_t * ) );
+#define aout_VolumeUp(a, b, c) __aout_VolumeUp(VLC_OBJECT(a), b, c)
+VLC_EXPORT( int, __aout_VolumeUp, ( vlc_object_t *, int, audio_volume_t * ) );
+#define aout_VolumeDown(a, b, c) __aout_VolumeDown(VLC_OBJECT(a), b, c)
+VLC_EXPORT( int, __aout_VolumeDown, ( vlc_object_t *, int, audio_volume_t * ) );
+#define aout_VolumeMute(a, b) __aout_VolumeMute(VLC_OBJECT(a), b)
+VLC_EXPORT( int, __aout_VolumeMute, ( vlc_object_t *, audio_volume_t * ) );