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diff --git a/bindings/audio/audio-api.h b/bindings/audio/audio-api.h
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+/*
+ * Copyright (C) 2015, 2016 "IoT.bzh"
+ * Author "Manuel Bachmann"
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef AUDIO_API_H
+#define AUDIO_API_H
+
+/* global plugin handle, should store everything we may need */
+typedef struct {
+  int devCount;
+} pluginHandleT;
+
+/* private client context [will be destroyed when client leaves] */
+typedef struct {
+  void *audio_dev;          /* handle to implementation (ALSA, PulseAudio...) */
+  char *name;               /* name of the audio card */
+  int idx;                  /* audio card index within global array           */
+  unsigned int volume[8];   /* audio volume (8 channels) : 0-100              */
+  unsigned int channels;    /* audio channels : 1(mono)/2(stereo)...          */
+  unsigned char mute;       /* audio muted : 0(false)/1(true)                 */
+  unsigned char is_playing; /* audio is playing: 0(false)/1(true)             */
+} audioCtxHandleT;
+
+
+#endif /* AUDIO_API_H */