vocabulary: moving from 'plugin' to 'binding'

Change-Id: Ic9e118df2bede1fefbb591f8ae7887266b7324ca
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

8 files changed, 1373 insertions, 0 deletions

diff --git a/bindings/audio/CMakeLists.txt b/bindings/audio/CMakeLists.txt
new file mode 100644
index 00000000..11da28e1
--- /dev/null
+++ b/bindings/audio/CMakeLists.txt
@@ -0,0 +1,27 @@
+INCLUDE(FindPkgConfig)
+PKG_CHECK_MODULES(alsa alsa)
+PKG_CHECK_MODULES(pulseaudio libpulse libpulse-simple)
+INCLUDE(FindThreads)
+FIND_PACKAGE(Threads)
+
+IF(alsa_FOUND)
+
+  MESSAGE(STATUS "ALSA found ; will compile Audio binding... (BINDING)")
+
+  IF(pulseaudio_FOUND)
+    MESSAGE(STATUS "PulseAudio found ; Audio binding will have PulseAudio support")
+    ADD_DEFINITIONS(-DHAVE_PULSE=1)
+    SET(pulse_sources audio-pulse.c)
+  ENDIF(pulseaudio_FOUND)
+
+  INCLUDE_DIRECTORIES(${include_dirs} ${alsa_INCLUDE_DIRS} ${pulseaudio_INCLUDE_DIRS})
+  ADD_LIBRARY(audio-api MODULE audio-api.c audio-alsa.c ${pulse_sources})
+  SET_TARGET_PROPERTIES(audio-api PROPERTIES
+	PREFIX ""
+	LINK_FLAGS "-Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/export.map"
+  )
+  TARGET_LINK_LIBRARIES(audio-api ${link_libraries} ${alsa_LIBRARIES} ${pulseaudio_LIBRARIES})
+  INSTALL(TARGETS audio-api
+          LIBRARY DESTINATION ${binding_install_dir})
+
+ENDIF(alsa_FOUND)
diff --git a/bindings/audio/audio-alsa.c b/bindings/audio/audio-alsa.c
new file mode 100644
index 00000000..45ff2edb
--- /dev/null
+++ b/bindings/audio/audio-alsa.c
@@ -0,0 +1,311 @@
+/*
+ * 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.
+ */
+
+#include "audio-api.h"
+#include "audio-alsa.h"
+
+snd_mixer_selem_channel_id_t SCHANNELS[8] = {
+ SND_MIXER_SCHN_FRONT_LEFT,
+ SND_MIXER_SCHN_FRONT_RIGHT,
+ SND_MIXER_SCHN_FRONT_CENTER,
+ SND_MIXER_SCHN_REAR_LEFT,
+ SND_MIXER_SCHN_REAR_RIGHT,
+ SND_MIXER_SCHN_REAR_CENTER,
+ SND_MIXER_SCHN_SIDE_LEFT,
+ SND_MIXER_SCHN_SIDE_RIGHT
+};
+
+static struct dev_ctx_alsa **dev_ctx_a = NULL;
+
+
+unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
+
+    snd_pcm_t *dev;
+    snd_pcm_hw_params_t *params;
+    snd_mixer_t *mixer;
+    snd_mixer_selem_id_t *mixer_sid;
+    snd_mixer_elem_t *mixer_elm;
+    snd_mixer_elem_t *mixer_elm_m;
+    unsigned int rate = 22050;
+    long vol, vol_min, vol_max;
+    int num, i;
+
+    if (snd_pcm_open (&dev, name, SND_PCM_STREAM_PLAYBACK, 0) < 0) {
+        fprintf (stderr, "ALSA backend could not open card '%s'\n", name);
+        return 0;
+    }
+
+    snd_pcm_hw_params_malloc (&params);
+    snd_pcm_hw_params_any (dev, params);
+    snd_pcm_hw_params_set_access (dev, params, SND_PCM_ACCESS_RW_INTERLEAVED);
+    snd_pcm_hw_params_set_format (dev, params, SND_PCM_FORMAT_S16_LE);
+    snd_pcm_hw_params_set_rate_near (dev, params, &rate, 0);
+    snd_pcm_hw_params_set_channels (dev, params, ctx->channels);
+    if (snd_pcm_hw_params (dev, params) < 0) {
+        snd_pcm_hw_params_free (params);
+        fprintf (stderr, "ALSA backend could set channels on card '%s'\n", name);
+        return 0;
+    }
+    snd_pcm_prepare (dev);
+
+    snd_mixer_open (&mixer, 0);
+    if (snd_mixer_attach (mixer, name) < 0) {
+        snd_pcm_hw_params_free (params);
+        fprintf (stderr, "ALSA backend could not open mixer for card '%s'\n", name);
+        return 0;
+    }
+    snd_mixer_selem_register (mixer, NULL, NULL);
+    snd_mixer_load (mixer);
+
+    snd_mixer_selem_id_alloca (&mixer_sid);
+    snd_mixer_selem_id_set_index (mixer_sid, 0);
+    snd_mixer_selem_id_set_name (mixer_sid, "Master");
+
+    mixer_elm = snd_mixer_find_selem (mixer, mixer_sid);
+    mixer_elm_m = NULL;
+
+    if (!mixer_elm) {
+        /* no "Master" mixer ; we are probably on a board... search ! */
+        for (mixer_elm = snd_mixer_first_elem (mixer); mixer_elm != NULL;
+             mixer_elm = snd_mixer_elem_next (mixer_elm)) {
+            if (snd_mixer_elem_info (mixer_elm) < 0)
+                continue;
+            snd_mixer_selem_get_id (mixer_elm, mixer_sid);
+            if (strstr (snd_mixer_selem_id_get_name (mixer_sid), "DVC Out")) {
+
+                /* this is Porter... let us found the specific mute switch */
+                snd_mixer_selem_id_set_index (mixer_sid, 0);
+                snd_mixer_selem_id_set_name (mixer_sid, "DVC Out Mute");
+                mixer_elm_m = snd_mixer_find_selem (mixer, mixer_sid);
+
+                break;
+            }
+        }
+    }
+
+    if (mixer_elm) {
+        snd_mixer_selem_get_playback_volume_range (mixer_elm, &vol_min, &vol_max);
+        snd_mixer_selem_get_playback_volume (mixer_elm, SND_MIXER_SCHN_FRONT_LEFT, &vol);
+    }
+
+    /* allocate the global array if it hasn't been done */
+    if (!dev_ctx_a) {
+        dev_ctx_a = (dev_ctx_alsa_T**) malloc (sizeof(dev_ctx_alsa_T*));
+        dev_ctx_a[0] = (dev_ctx_alsa_T*) malloc (sizeof(dev_ctx_alsa_T));
+        dev_ctx_a[0]->name = NULL;
+        dev_ctx_a[0]->dev = NULL;
+    }
+
+    /* is a card with similar name already opened ? */
+    for (num = 0; num < (sizeof(dev_ctx_a)/sizeof(dev_ctx_alsa_T*)); num++) {
+        if (dev_ctx_a[num]->name &&
+           !strcmp (dev_ctx_a[num]->name, name)) {
+            fprintf (stderr, "Card '%s' already locked by other ALSA backend session\n", name);
+            return 0;
+        }
+    }
+    num--;
+
+    /* it's not... let us add it to the global array */
+    dev_ctx_a = (dev_ctx_alsa_T**) realloc (dev_ctx_a, (num+1)*sizeof(dev_ctx_alsa_T*));
+    if (!dev_ctx_a[num])
+        dev_ctx_a[num] = (dev_ctx_alsa_T*) malloc (sizeof(dev_ctx_alsa_T));
+    dev_ctx_a[num]->name = strdup (name);
+    dev_ctx_a[num]->dev = dev;
+    dev_ctx_a[num]->params = params;
+    dev_ctx_a[num]->mixer_elm = mixer_elm;
+    dev_ctx_a[num]->mixer_elm_m = mixer_elm_m;
+    dev_ctx_a[num]->vol_max = vol_max;
+    dev_ctx_a[num]->vol = vol;
+    dev_ctx_a[num]->thr_should_run = 0;
+    dev_ctx_a[num]->thr_finished = 0;
+
+    /* make the client context aware of current card state */
+    for (i = 0; i < 8; i++)
+        ctx->volume[i] = _alsa_get_volume (num, i);
+    ctx->mute = _alsa_get_mute (num);
+    ctx->idx = num;
+    ctx->name = strdup (name);
+
+    fprintf (stderr, "Successfully initialized ALSA backend.\n");
+
+    return 1;
+}
+
+void _alsa_free (const char *name) {
+
+    int num;
+
+    for (num = 0; num < (sizeof(dev_ctx_a)/sizeof(dev_ctx_alsa_T*)); num++) {
+        if (dev_ctx_a[num]->name &&
+           !strcmp (dev_ctx_a[num]->name, name)) {
+            snd_pcm_close (dev_ctx_a[num]->dev);
+            snd_pcm_hw_params_free (dev_ctx_a[num]->params);
+            free (dev_ctx_a[num]->name);
+            dev_ctx_a[num]->dev = NULL;
+            dev_ctx_a[num]->name = NULL;
+            free (dev_ctx_a[num]);
+            return;
+        }
+    }
+}
+
+void _alsa_play (int num) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || dev_ctx_a[num]->thr_should_run ||
+        access (AUDIO_BUFFER, F_OK) == -1)
+        return;
+
+    dev_ctx_a[num]->thr_should_run = 1;
+    dev_ctx_a[num]->thr_finished = 0;
+    pthread_create (&dev_ctx_a[num]->thr, NULL, _alsa_play_thread_fn, (void*)dev_ctx_a[num]);
+}
+
+void _alsa_stop (int num) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->thr_should_run)
+        return;
+
+    /* stop the "while" loop in thread */
+    dev_ctx_a[num]->thr_should_run = 0;
+
+    while (!dev_ctx_a[num]->thr_finished)
+        usleep(100000);
+
+    pthread_join (dev_ctx_a[num]->thr, NULL);
+}
+
+unsigned int _alsa_get_volume (int num, unsigned int channel) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm)
+        return 0;
+
+    snd_mixer_selem_get_playback_volume (dev_ctx_a[num]->mixer_elm, SCHANNELS[channel], &dev_ctx_a[num]->vol);
+
+    return (unsigned int)(dev_ctx_a[num]->vol*100)/dev_ctx_a[num]->vol_max;
+}
+
+void _alsa_set_volume (int num, unsigned int channel, unsigned int vol) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm ||
+        vol > 100)
+        return;
+
+    snd_mixer_selem_set_playback_volume (dev_ctx_a[num]->mixer_elm, SCHANNELS[channel], (vol*dev_ctx_a[num]->vol_max)/100);
+}
+
+void _alsa_set_volume_all (int num, unsigned int vol) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm ||
+        vol > 100)
+
+    fflush (stdout); /* seems to force this logic to apply quickly */
+    snd_mixer_selem_set_playback_volume_all (dev_ctx_a[num]->mixer_elm, (vol*dev_ctx_a[num]->vol_max)/100);
+}
+
+unsigned char _alsa_get_mute (int num) {
+
+    int mute = 0;
+    snd_mixer_elem_t *elm_m;
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm)
+        return 0;
+
+    dev_ctx_a[num]->mixer_elm_m ? (elm_m = dev_ctx_a[num]->mixer_elm_m) :
+                                  (elm_m = dev_ctx_a[num]->mixer_elm);
+
+    if (snd_mixer_selem_has_playback_switch (elm_m)) {
+        snd_mixer_selem_get_playback_switch (elm_m, SND_MIXER_SCHN_FRONT_LEFT, &mute);
+        snd_mixer_selem_get_playback_switch (elm_m, SND_MIXER_SCHN_FRONT_RIGHT, &mute);
+    }
+
+    if (dev_ctx_a[num]->mixer_elm_m)
+        return (unsigned char)mute;
+    else
+        return (unsigned char)!mute;
+}
+
+void _alsa_set_mute (int num, unsigned char tomute) {
+
+    snd_mixer_elem_t *elm_m;
+    int mute;
+
+    if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm || 1 < tomute)
+        return;
+
+    if (dev_ctx_a[num]->mixer_elm_m) {
+        elm_m = dev_ctx_a[num]->mixer_elm_m;
+        mute = (int)!tomute;
+    } else {
+        elm_m = dev_ctx_a[num]->mixer_elm;
+        mute = (int)tomute;
+    }
+
+    if (snd_mixer_selem_has_playback_switch (elm_m))
+        snd_mixer_selem_set_playback_switch_all (elm_m, !mute);
+}
+
+void _alsa_set_rate (int num, unsigned int rate) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num])
+        return;
+
+    snd_pcm_hw_params_set_rate_near (dev_ctx_a[num]->dev, dev_ctx_a[num]->params, &rate, 0);
+}
+
+void _alsa_set_channels (int num, unsigned int channels) {
+
+    if (!dev_ctx_a || !dev_ctx_a[num])
+        return;
+
+    snd_pcm_hw_params_set_channels (dev_ctx_a[num]->dev, dev_ctx_a[num]->params, channels);
+}
+
+ /* ---- LOCAL THREADED FUNCTIONS ---- */
+
+void* _alsa_play_thread_fn (void *ctx) {
+
+    dev_ctx_alsa_T *dev_ctx_a = (dev_ctx_alsa_T *)ctx;
+    FILE *file = NULL;
+    char *buf = NULL;
+    long size;
+    int frames, res;
+
+    file = fopen (AUDIO_BUFFER, "rb");
+
+    while (dev_ctx_a->thr_should_run && file && (access (AUDIO_BUFFER, F_OK) != -1) ) {
+        fseek (file, 0, SEEK_END);
+        size = ftell (file);
+        buf = (char*) realloc (buf, size * sizeof(char));
+        frames = (size * sizeof(char)) / 4;
+
+        fseek (file, 0, SEEK_SET);
+        fread (buf, 1, size, file);
+        fflush (file);
+
+        if ((res = snd_pcm_writei (dev_ctx_a->dev, buf, frames)) != frames) {
+            snd_pcm_recover (dev_ctx_a->dev, res, 0);
+            snd_pcm_prepare (dev_ctx_a->dev);
+        }
+        /* snd_pcm_drain (dev_ctx->dev); */
+    }
+    if (buf) free(buf);
+    if (file) fclose(file);
+
+    dev_ctx_a->thr_finished = 1;
+    return 0;
+}
diff --git a/bindings/audio/audio-alsa.h b/bindings/audio/audio-alsa.h
new file mode 100644
index 00000000..679d4eee
--- /dev/null
+++ b/bindings/audio/audio-alsa.h
@@ -0,0 +1,56 @@
+/*
+ * 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_ALSA_H
+#define AUDIO_ALSA_H
+
+#include <pthread.h>
+#include <alsa/asoundlib.h>
+
+#include "audio-api.h"
+
+#define AUDIO_BUFFER "/tmp/audio_buf"
+
+typedef struct dev_ctx_alsa dev_ctx_alsa_T;
+
+struct dev_ctx_alsa {
+  char *name;
+  snd_pcm_t *dev;
+  snd_pcm_hw_params_t *params;
+  snd_mixer_elem_t *mixer_elm;
+  snd_mixer_elem_t *mixer_elm_m;
+  long vol_max;
+  long vol;
+  pthread_t thr;
+  unsigned char thr_should_run;
+  unsigned char thr_finished;
+};
+
+unsigned char _alsa_init (const char *, audioCtxHandleT *);
+void _alsa_free (const char *);
+void _alsa_play (int);
+void _alsa_stop (int);
+unsigned int _alsa_get_volume (int, unsigned int);
+void _alsa_set_volume (int, unsigned int, unsigned int);
+void _alsa_set_volume_all (int, unsigned int);
+unsigned char _alsa_get_mute (int);
+void _alsa_set_mute (int, unsigned char);
+void _alsa_set_channels (int, unsigned int);
+
+void* _alsa_play_thread_fn (void *);
+
+#endif /* AUDIO_ALSA_H */
diff --git a/bindings/audio/audio-api.c b/bindings/audio/audio-api.c
new file mode 100644
index 00000000..1ba9126c
--- /dev/null
+++ b/bindings/audio/audio-api.c
@@ -0,0 +1,383 @@
+/*
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <json-c/json.h>
+
+#include "audio-api.h"
+#include "audio-alsa.h"
+#ifdef HAVE_PULSE
+#include "audio-pulse.h"
+#endif
+
+#include <afb/afb-plugin.h>
+#include <afb/afb-req-itf.h>
+
+/* ------ BACKEND FUNCTIONS ------- */
+
+unsigned char _backend_init (const char *name, audioCtxHandleT *ctx) {
+
+    char *backend_env = getenv ("AFB_AUDIO_OUTPUT");
+    unsigned char res = 0;
+
+# ifdef HAVE_PULSE
+    if (!backend_env || (strcasecmp (backend_env, "Pulse") == 0))
+        res = _pulse_init (name, ctx);
+    if (!res)
+#endif
+    res = _alsa_init (name, ctx);
+
+    if (!res)
+        fprintf (stderr, "Could not initialize Audio backend\n");
+
+    return res;
+}
+
+void _backend_free (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_free (ctx); else
+# endif
+    _alsa_free (ctx->name);
+}
+
+void _backend_play (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_play (ctx); else
+# endif
+    _alsa_play (ctx->idx);
+}
+
+void _backend_stop (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_stop (ctx); else
+# endif
+    _alsa_stop (ctx->idx);
+}
+
+unsigned int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) return _pulse_get_volume (ctx, channel); else
+# endif
+    return _alsa_get_volume (ctx->idx, channel);
+}
+
+void _backend_set_volume (audioCtxHandleT *ctx, unsigned int channel, unsigned int vol) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_set_volume (ctx, channel, vol); else
+# endif
+    _alsa_set_volume (ctx->idx, channel, vol);
+}
+
+void _backend_set_volume_all (audioCtxHandleT *ctx, unsigned int vol) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_set_volume_all (ctx, vol); else
+# endif
+    _alsa_set_volume_all (ctx->idx, vol);
+}
+
+unsigned char _backend_get_mute (audioCtxHandleT *ctx) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) return _pulse_get_mute (ctx); else
+# endif
+    return _alsa_get_mute (ctx->idx);
+}
+
+void _backend_set_mute (audioCtxHandleT *ctx, unsigned char mute) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) _pulse_set_mute (ctx, mute); else
+# endif
+    _alsa_set_mute (ctx->idx, mute);
+}
+
+void _backend_set_channels (audioCtxHandleT *ctx, unsigned int channels) {
+
+# ifdef HAVE_PULSE
+    if (ctx->audio_dev) return; else
+# endif
+    _alsa_set_channels (ctx->idx, channels);
+}
+
+/* ------ LOCAL HELPER FUNCTIONS --------- */
+
+/* private client context constructor ; default values */
+static audioCtxHandleT* initAudioCtx () {
+
+    audioCtxHandleT *ctx;
+    int i;
+
+    ctx = malloc (sizeof(audioCtxHandleT));
+    ctx->audio_dev = NULL;
+    ctx->name = NULL;
+    ctx->idx = -1;
+    for (i = 0; i < 8; i++)
+        ctx->volume[i] = 25;
+    ctx->channels = 2;
+    ctx->mute = 0;
+    ctx->is_playing = 0;
+
+    return ctx;
+}
+
+static void releaseAudioCtx (void *context) {
+
+    audioCtxHandleT *ctx = (audioCtxHandleT*) context;
+
+    /* power it off */
+    _backend_free (ctx);
+
+    /* clean client context */
+    ctx->audio_dev = NULL;
+    if (ctx->name)
+		free (ctx->name);
+    ctx->idx = -1;
+    free (ctx);
+}
+
+
+/* ------ PUBLIC PLUGIN FUNCTIONS --------- */
+
+static void init (struct afb_req request) {        /* AFB_SESSION_CHECK */
+
+    audioCtxHandleT *ctx = afb_req_context_get (request);
+    json_object *jresp;
+
+    /* create a private client context */
+	if (!ctx) {
+        ctx = initAudioCtx();
+        afb_req_context_set (request, ctx, releaseAudioCtx);
+    }
+
+    if (!_backend_init ("default", ctx))
+        afb_req_fail (request, "failed", "backend initialization failed");
+
+    jresp = json_object_new_object();
+    json_object_object_add (jresp, "init", json_object_new_string ("success"));
+    afb_req_success (request, jresp, "Audio initialized");
+}
+
+static void volume (struct afb_req request) {      /* AFB_SESSION_CHECK */
+
+    audioCtxHandleT *ctx = afb_req_context_get (request);
+    const char *value = afb_req_value (request, "value");
+    json_object *jresp;
+    unsigned int volume[8], i;
+    char *volume_i;
+    char volume_str[256];
+    size_t len_str = 0;
+
+	if (!ctx) {
+        afb_req_fail (request, "failed", "you must call 'init' first");
+        return;
+    }
+    jresp = json_object_new_object();
+
+    /* no "?value=" parameter : return current state */
+    if (!value) {
+        for (i = 0; i < 8; i++) {
+            ctx->volume[i] = _backend_get_volume (ctx, i);
+            snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+            len_str = strlen (volume_str);
+        }
+        json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
+        afb_req_success (request, jresp, "Audio - Volume obtained");
+        return;
+    }
+
+    /* "?value=" parameter, set volume */
+    else {
+        volume_i = strdup (value);
+        volume_i = strtok (volume_i, ",");
+        volume[0] = (unsigned int) atoi (volume_i);
+
+        if (100 < volume[0]) {
+            free (volume_i);
+            afb_req_fail (request, "failed", "volume must be between 0 and 100");
+            return;
+        }
+        ctx->volume[0] = volume[0];
+        _backend_set_volume (ctx, 0, ctx->volume[0]);
+        snprintf (volume_str, sizeof(volume_str), "%d,", ctx->volume[0]);
+
+        for (i = 1; i < 8; i++) {
+            volume_i = strtok (NULL, ",");
+            /* if there is only one value, set all channels to this one */
+            if (!volume_i && i == 1)
+               _backend_set_volume_all (ctx, ctx->volume[0]);
+            if (!volume_i || 100 < atoi(volume_i) || atoi(volume_i) < 0)
+               ctx->volume[i] = _backend_get_volume (ctx, i);
+            else {
+               ctx->volume[i] = (unsigned int) atoi(volume_i);
+               _backend_set_volume (ctx, i, ctx->volume[i]);
+            }
+            len_str = strlen(volume_str);
+            snprintf (volume_str+len_str, sizeof(volume_str)-len_str, "%d,", ctx->volume[i]);
+        }
+        free (volume_i);
+        json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
+    }
+
+    afb_req_success (request, jresp, "Audio - Volume changed");
+}
+
+static void channels (struct afb_req request) {    /* AFB_SESSION_CHECK */
+
+    audioCtxHandleT *ctx = afb_req_context_get (request);
+    const char *value = afb_req_value (request, "value");
+    json_object *jresp;
+    char channels_str[256];
+
+	if (!ctx) {
+        afb_req_fail (request, "failed", "you must call 'init' first");
+        return;
+    }
+    jresp = json_object_new_object();
+
+    /* no "?value=" parameter : return current state */
+    if (!value) {
+        snprintf (channels_str, sizeof(channels_str), "%d", ctx->channels);
+
+        json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
+        afb_req_success (request, jresp, "Audio - Channels obtained");
+        return;
+    }
+
+    /* "?value=" parameter, set channels */
+    else {
+        ctx->channels = (unsigned int) atoi (value);
+        _backend_set_channels (ctx, ctx->channels);
+        snprintf (channels_str, sizeof(channels_str), "%d", ctx->channels);
+
+        jresp = json_object_new_object();
+        json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
+    }
+
+    afb_req_success (request, jresp, "Audio - Channels set");
+}
+
+static void mute (struct afb_req request) {        /* AFB_SESSION_CHECK */
+
+    audioCtxHandleT *ctx = afb_req_context_get (request);
+    const char *value = afb_req_value (request, "value");
+    json_object *jresp;
+
+	if (!ctx) {
+        afb_req_fail (request, "failed", "you must call 'init' first");
+        return;
+    }
+    jresp = json_object_new_object();
+
+    /* no "?value=" parameter : return current state */
+    if (!value) {
+        ctx->mute = _backend_get_mute (ctx);
+        ctx->mute ?
+            json_object_object_add (jresp, "mute", json_object_new_string ("on"))
+          : json_object_object_add (jresp, "mute", json_object_new_string ("off"));
+        afb_req_success (request, jresp, "Audio - Mute status obtained");
+        return;
+    }
+
+    /* "?value=" parameter is "1" or "true" */
+    else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
+        ctx->mute = 1;
+        _backend_set_mute (ctx, ctx->mute);
+        json_object_object_add (jresp, "mute", json_object_new_string ("on"));
+    }
+
+    /* "?value=" parameter is "0" or "false" */
+    else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
+        ctx->mute = 0;
+        _backend_set_mute (ctx, ctx->mute);
+        json_object_object_add (jresp, "mute", json_object_new_string ("off"));
+    }
+
+    afb_req_success (request, jresp, "Audio - Mute set");
+}
+
+static void play (struct afb_req request) {        /* AFB_SESSION_CHECK */
+
+    audioCtxHandleT *ctx = afb_req_context_get (request);
+    const char *value = afb_req_value (request, "value");
+    json_object *jresp;
+
+	if (!ctx) {
+        afb_req_fail (request, "failed", "you must call 'init' first");
+        return;
+    }
+    jresp = json_object_new_object();
+
+    /* no "?value=" parameter : return current state */
+    if (!value) {
+        ctx->is_playing ?
+            json_object_object_add (jresp, "play", json_object_new_string ("on"))
+          : json_object_object_add (jresp, "play", json_object_new_string ("off"));
+        afb_req_success (request, jresp, "Audio - Playing status obtained");
+        return;
+    }
+
+    /* "?value=" parameter is "1" or "true" */
+    else if ( atoi(value) == 1 || !strcasecmp(value, "true") ) {
+        ctx->is_playing = 1;
+        _backend_play (ctx);
+        json_object_object_add (jresp, "play", json_object_new_string ("on"));
+    }
+
+    /* "?value=" parameter is "0" or "false" */
+    else if ( atoi(value) == 0 || !strcasecmp(value, "false") ) {
+        ctx->is_playing = 0;
+        _backend_stop (ctx);
+        json_object_object_add (jresp, "play", json_object_new_string ("off"));
+    }
+
+    afb_req_success (request, jresp, "Audio - Play");
+}
+
+static void ping (struct afb_req request) {         /* AFB_SESSION_NONE */
+    afb_req_success (request, NULL, "Audio - Ping success");
+}
+
+static const struct AFB_verb_desc_v1 verbs[] = {
+  {"init"    , AFB_SESSION_CHECK,  init      , "Audio API - init"},
+  {"volume"  , AFB_SESSION_CHECK,  volume    , "Audio API - volume"},
+  {"channels", AFB_SESSION_CHECK,  channels  , "Audio API - channels"},
+  {"mute"    , AFB_SESSION_CHECK,  mute      , "Audio API - mute"},
+  {"play"    , AFB_SESSION_CHECK,  play      , "Audio API - play"},
+  {"ping"    , AFB_SESSION_NONE,   ping      , "Audio API - ping"},
+  {NULL}
+};
+
+static const struct AFB_plugin pluginDesc = {
+    .type   = AFB_PLUGIN_VERSION_1,
+    .v1 = {
+        .info   = "Application Framework Binder - Audio plugin",
+        .prefix = "audio",
+        .verbs   = verbs
+    }
+};
+
+const struct AFB_plugin *pluginAfbV1Register (const struct AFB_interface *itf)
+{
+	return &pluginDesc;
+}
diff --git a/bindings/audio/audio-api.h b/bindings/audio/audio-api.h
new file mode 100644
index 00000000..f5c77c2e
--- /dev/null
+++ b/bindings/audio/audio-api.h
@@ -0,0 +1,38 @@
+/*
+ * 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 */
diff --git a/bindings/audio/audio-pulse.c b/bindings/audio/audio-pulse.c
new file mode 100644
index 00000000..34643603
--- /dev/null
+++ b/bindings/audio/audio-pulse.c
@@ -0,0 +1,491 @@
+/*
+ * Copyright (C) 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.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+
+#include "audio-api.h"
+#include "audio-pulse.h"
+
+static struct alsa_info **alsa_info = NULL;
+static struct dev_ctx_pulse **dev_ctx_p = NULL;
+static unsigned int client_count = 0;
+
+
+unsigned char _pulse_init (const char *name, audioCtxHandleT *ctx) {
+
+    pa_mainloop *pa_loop;
+    pa_mainloop_api *pa_api;
+    pa_context *pa_context;
+    pa_simple *pa;
+    pa_sample_spec *pa_spec;
+    struct timeval tv_start, tv_now;
+    int ret, error, i;
+
+    pa_loop = pa_mainloop_new ();
+    pa_api = pa_mainloop_get_api (pa_loop);
+    pa_context = pa_context_new (pa_api, "afb-audio-plugin");
+
+    /* allocate the global array if it hasn't been done */
+    if (!dev_ctx_p)
+        dev_ctx_p = (dev_ctx_pulse_T**) malloc (sizeof(dev_ctx_pulse_T*));
+
+    /* create a temporary device, to be held until sink gets discovered */
+    dev_ctx_pulse_T *dev_ctx_p_t = (dev_ctx_pulse_T*) malloc (sizeof(dev_ctx_pulse_T));
+    dev_ctx_p_t->sink_name = NULL;
+    dev_ctx_p_t->card_name = (char**) malloc (sizeof(char*));
+    dev_ctx_p_t->card_name[0] = strdup (name);
+    dev_ctx_p_t->pa_loop = pa_loop;
+    dev_ctx_p_t->pa_context = pa_context;
+
+    pa_context_set_state_callback (pa_context, _pulse_context_cb, (void*)dev_ctx_p_t);
+    pa_context_connect (pa_context, NULL, 0, NULL);
+
+    /* 1 second should be sufficient to retrieve sink info */
+    gettimeofday (&tv_start, NULL);
+    gettimeofday (&tv_now, NULL);
+    while (tv_now.tv_sec - tv_start.tv_sec <= 2) {
+        pa_mainloop_iterate (pa_loop, 0, &ret);
+
+        if (ret == -1) { /* generic error */
+            fprintf (stderr, "Stopping PulseAudio backend...\n");
+            return 0;
+        }
+
+        if ((ret > 0)&&(ret < 100)) { /* 0 and >100 are PulseAudio codes */
+            /* found a matching sink from callback */
+            fprintf (stderr, "Success : using sink n.%d\n", ret-1);
+            ctx->audio_dev = (void*)dev_ctx_p[ret-1];
+            break;
+        }
+        gettimeofday (&tv_now, NULL);
+    }
+    /* fail if we found no matching sink */
+    if (!ctx->audio_dev)
+      return 0;
+
+    /* make the client context aware of current card state */
+    ctx->mute = (unsigned char)dev_ctx_p[ret-1]->mute;
+    ctx->channels = (unsigned int)dev_ctx_p[ret-1]->volume.channels;
+    for (i = 0; i < ctx->channels; i++)
+        ctx->volume[i] = dev_ctx_p[ret-1]->volume.values[i];
+    ctx->idx = ret-1;
+
+    /* open matching sink for playback */
+    pa_spec = (pa_sample_spec*) malloc (sizeof(pa_sample_spec));
+    pa_spec->format = PA_SAMPLE_S16LE;
+    pa_spec->rate = 22050;
+    pa_spec->channels = (uint8_t)ctx->channels;
+
+    if (!(pa = pa_simple_new (NULL, "afb-audio-plugin", PA_STREAM_PLAYBACK, dev_ctx_p[ret-1]->sink_name,
+                              "afb-audio-output", pa_spec, NULL, NULL, &error))) {
+        fprintf (stderr, "Error opening PulseAudio sink %s : %s\n",
+                          dev_ctx_p[ret-1]->sink_name, pa_strerror(error));
+        return 0;
+    }
+    dev_ctx_p[ret-1]->pa = pa;
+    free (pa_spec);
+
+    client_count++;
+
+    fprintf (stderr, "Successfully initialized PulseAudio backend.\n");
+
+    return 1;
+}
+
+void _pulse_free (audioCtxHandleT *ctx) {
+
+    int num, i;
+
+    client_count--;
+    if (client_count > 0) return;
+
+    for (num = 0; num < (sizeof(dev_ctx_p)/sizeof(dev_ctx_pulse_T*)); num++) {
+
+         for (i = 0; num < (sizeof(dev_ctx_p[num]->card_name)/sizeof(char*)); i++) {
+             free (dev_ctx_p[num]->card_name[i]);
+             dev_ctx_p[num]->card_name[i] = NULL;
+         }
+         pa_context_disconnect (dev_ctx_p[num]->pa_context);
+         pa_context_unref (dev_ctx_p[num]->pa_context);
+         pa_mainloop_free (dev_ctx_p[num]->pa_loop);
+         pa_simple_free (dev_ctx_p[num]->pa);
+         free (dev_ctx_p[num]->sink_name);
+         dev_ctx_p[num]->pa_context = NULL;
+         dev_ctx_p[num]->pa_loop = NULL;
+         dev_ctx_p[num]->pa = NULL;
+         dev_ctx_p[num]->sink_name = NULL;
+         free (dev_ctx_p[num]);
+    }
+}
+
+void _pulse_play (audioCtxHandleT *ctx) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+
+    if (!dev_ctx_p_c || dev_ctx_p_c->thr_should_run || access (AUDIO_BUFFER, F_OK) == -1)
+        return;
+
+    dev_ctx_p_c->thr_should_run = 1;
+    dev_ctx_p_c->thr_finished = 0;
+    pthread_create (&dev_ctx_p_c->thr, NULL, _pulse_play_thread_fn, (void*)dev_ctx_p_c);
+}
+
+void _pulse_stop (audioCtxHandleT *ctx) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+
+    if (!dev_ctx_p_c || !dev_ctx_p_c->thr_should_run)
+        return;
+
+    dev_ctx_p_c->thr_should_run = 0;
+    while (!dev_ctx_p_c->thr_finished)
+        usleep(100000);
+    pthread_join (dev_ctx_p_c->thr, NULL);
+}
+
+unsigned int _pulse_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+
+    if (!dev_ctx_p_c)
+        return 0;
+
+    _pulse_refresh_sink (dev_ctx_p_c);
+
+    return (dev_ctx_p_c->volume.values[channel]*100)/PA_VOLUME_NORM;
+}
+
+void _pulse_set_volume (audioCtxHandleT *ctx, unsigned int channel, unsigned int vol) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+    struct pa_cvolume volume;
+
+    if (!dev_ctx_p_c)
+        return;
+
+    volume = dev_ctx_p_c->volume;
+    volume.values[channel] = (vol*PA_VOLUME_NORM)/100;
+
+    pa_context_set_sink_volume_by_name (dev_ctx_p_c->pa_context, dev_ctx_p_c->sink_name,
+                                        &volume, NULL, NULL);
+    _pulse_refresh_sink (dev_ctx_p_c);
+}
+
+void _pulse_set_volume_all (audioCtxHandleT *ctx, unsigned int vol) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+    struct pa_cvolume volume;
+
+    if (!dev_ctx_p_c)
+        return;
+
+    pa_cvolume_init (&volume);
+    pa_cvolume_set (&volume, dev_ctx_p_c->volume.channels, vol);
+
+    pa_context_set_sink_volume_by_name (dev_ctx_p_c->pa_context, dev_ctx_p_c->sink_name,
+                                        &volume, NULL, NULL);
+    _pulse_refresh_sink (dev_ctx_p_c);
+}
+
+unsigned char _pulse_get_mute (audioCtxHandleT *ctx) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+
+    if (!dev_ctx_p_c)
+        return 0;
+
+    _pulse_refresh_sink (dev_ctx_p_c);
+
+    return (unsigned char)dev_ctx_p_c->mute;
+}
+
+void _pulse_set_mute (audioCtxHandleT *ctx, unsigned char mute) {
+
+    dev_ctx_pulse_T* dev_ctx_p_c = (dev_ctx_pulse_T*)ctx->audio_dev;
+
+    if (!dev_ctx_p_c)
+        return;
+
+    pa_context_set_sink_mute_by_name (dev_ctx_p_c->pa_context, dev_ctx_p_c->sink_name,
+                                      (int)mute, NULL, NULL);
+    _pulse_refresh_sink (dev_ctx_p_c);
+}
+
+ /* ---- LOCAL HELPER FUNCTIONS ---- */
+
+void _pulse_refresh_sink (dev_ctx_pulse_T* dev_ctx_p_c) {
+
+    pa_mainloop_api *pa_api;
+
+    dev_ctx_p_c->pa_loop = pa_mainloop_new ();
+    pa_api = pa_mainloop_get_api (dev_ctx_p_c->pa_loop);
+    dev_ctx_p_c->pa_context = pa_context_new (pa_api, "afb-audio-plugin");
+
+    dev_ctx_p_c->refresh = 1;
+
+    switch (pa_context_get_state (dev_ctx_p_c->pa_context)) {
+      case PA_CONTEXT_READY:
+        pa_context_get_sink_info_by_name (dev_ctx_p_c->pa_context,
+                                          dev_ctx_p_c->sink_name,
+                                          _pulse_sink_info_cb, (void*)dev_ctx_p_c);
+        break;
+      default:
+        return;
+    }
+
+    while (dev_ctx_p_c->refresh)
+        pa_mainloop_iterate (dev_ctx_p_c->pa_loop, 0, NULL);
+}
+
+void _pulse_enumerate_cards () {
+
+    void **cards, **card;
+    char *name, *found, *alsa_name, *card_name;
+    int new_info, i, num = 0;
+
+    /* allocate the global alsa array */
+    alsa_info = (alsa_info_T**) malloc (sizeof(alsa_info_T*));
+    alsa_info[0] = (alsa_info_T*) malloc (sizeof(alsa_info_T));
+    alsa_info[0]->device = NULL;
+    alsa_info[0]->synonyms = NULL;
+
+    /* we use ALSA to enumerate cards */
+    snd_device_name_hint (-1, "pcm", &cards);
+    card = cards;
+
+    for (; *card != NULL; card++) {
+        name = snd_device_name_get_hint (*card, "NAME");
+        new_info = 1;
+
+        /* alsa name is before ':' (if ':' misses, then it has no card) */
+        found = strstr (name, ":");
+        if (!found) continue;
+        /* */
+        alsa_name = (char*) malloc (found-name+1);
+        strncpy (alsa_name, name, found-name);
+        alsa_name[found-name] = '\0';
+
+        /* card name is the invariant between "CARD=" and ',' */
+        found = strstr (name, "CARD=");
+        if (!found) continue;
+        /* */
+        found += 5;
+        card_name = strdup (found);
+        found = strstr (card_name, ",");
+        if (found) card_name[found-card_name] = '\0';
+
+        /* was the card name already listed in the global alsa array ? */
+        for (i = 0; i < (sizeof(alsa_info)/sizeof(alsa_info_T*)); i++) {
+
+            if (alsa_info[i]->device &&
+                !strcmp (alsa_info[i]->device, card_name)) {
+                /* it was ; add the alsa name as a new synonym */
+                asprintf (&alsa_info[i]->synonyms, "%s:%s", alsa_info[i]->synonyms, alsa_name);
+                new_info = 0;
+                break;
+            }            
+        }
+        /* it was not ; create it */
+        if (new_info) {
+            alsa_info = (alsa_info_T**) realloc (alsa_info, (num+1)*sizeof(alsa_info_T*));
+            alsa_info[num] = (alsa_info_T*) malloc (sizeof(alsa_info_T));
+            alsa_info[num]->device = strdup (card_name);
+            asprintf (&alsa_info[num]->synonyms, ":%s", alsa_name);
+            num++;
+        }
+        free (alsa_name);
+        free (card_name);
+    }
+}
+
+char** _pulse_find_cards (const char *name) {
+
+    char **cards = NULL;
+    char *needle, *found, *next;
+    int num, i = 0;
+
+    if (!alsa_info)
+      _pulse_enumerate_cards ();
+
+    asprintf (&needle, ":%s", name);
+
+    for (num = 0; num < (sizeof(alsa_info)/sizeof(alsa_info_T*)); num++) {
+
+        found = strstr (alsa_info[num]->synonyms, needle);
+        while (found) {
+            /* if next character is not ':' or '\0', we are wrong */
+            if ((found[strlen(name)+1] != ':') && (found[strlen(name)+1] != '\0')) {
+                found = strstr (found+1, needle);
+                continue;
+            }
+            /* found it ; now return all the "synonym" cards */
+            found = strstr (alsa_info[num]->synonyms, ":");
+            while (found) {
+                next = strstr (found+1, ":");
+                if (!next) break;
+                cards = (char**) realloc (cards, (i+1)*sizeof(char*));
+                cards[i] = (char*) malloc (next-found+1);
+                strncpy (cards[i], found+1, next-found);
+                cards[i][next-found-1] = '\0';
+                found = next; i++;
+            }
+        }
+    }
+    free (needle);
+
+    return cards;
+}
+
+ /* ---- LOCAL CALLBACK FUNCTIONS ---- */
+
+void _pulse_context_cb (pa_context *context, void *data) {
+
+    pa_context_state_t state = pa_context_get_state (context);
+    dev_ctx_pulse_T *dev_ctx_p_t = (dev_ctx_pulse_T *)data;
+
+    if (state == PA_CONTEXT_FAILED) {
+        fprintf (stderr, "Could not connect to PulseAudio !\n");
+        pa_mainloop_quit (dev_ctx_p_t->pa_loop, -1);
+        pa_context_disconnect (dev_ctx_p_t->pa_context);
+        pa_context_unref (dev_ctx_p_t->pa_context);
+        pa_mainloop_free (dev_ctx_p_t->pa_loop);
+    }
+
+    if (state == PA_CONTEXT_READY)
+        pa_context_get_sink_info_list (context, _pulse_sink_list_cb, (void*)dev_ctx_p_t);
+}
+
+void _pulse_sink_list_cb (pa_context *context, const pa_sink_info *info,
+				 int eol, void *data) {
+
+    dev_ctx_pulse_T *dev_ctx_p_t = (dev_ctx_pulse_T *)data;
+    const char *device_string;
+    char *device, *found;
+    char **cards;
+    int num, i;
+
+    if (eol != 0)
+        return;
+
+    device_string = pa_proplist_gets (info->proplist, "device.string");
+    /* ignore sinks with no cards */
+    if (!device_string)
+        return;
+
+    /* was a sink with similar name already found ? */
+    for (num = 0; num < (sizeof(dev_ctx_p)/sizeof(dev_ctx_pulse_T*)); num++) {
+        if (dev_ctx_p[num]->sink_name &&
+           !strcmp (dev_ctx_p[num]->sink_name, info->name)) {
+
+            /* yet it was, did it have the required card ? */
+            cards = dev_ctx_p[num]->card_name;
+            for (i = 0; i < (sizeof(cards)/sizeof(char*)); i++) {
+                if (!strcmp (cards[i], dev_ctx_p_t->card_name[0])) {
+                    /* it did : stop there and succeed */
+                    fprintf (stderr, "Found matching sink : %s\n", info->name);
+                    /* we return num+1 because '0' is already used */
+                    pa_mainloop_quit (dev_ctx_p_t->pa_loop, num+1);
+                    pa_context_disconnect (dev_ctx_p_t->pa_context);
+                    pa_context_unref (dev_ctx_p_t->pa_context);
+                    pa_mainloop_free (dev_ctx_p_t->pa_loop);
+                }
+            }
+            /* it did not, ignore and return */
+            return;
+        }
+    }
+    num++;
+
+    /* remove ending ":0",":1"... in device name */
+    device = strdup (device_string);
+    found = strstr (device, ":");
+    if (found) device[found-device] = '\0';
+
+    /* new sink, find all the cards it manages, fail if none */
+    cards = _pulse_find_cards (device);
+    free (device);
+    if (!cards)
+        return;
+
+    /* everything is well, register it in global array */
+    dev_ctx_p_t->sink_name = strdup (info->name);
+    dev_ctx_p_t->card_name = cards;
+    dev_ctx_p_t->mute = info->mute;
+    dev_ctx_p_t->volume = info->volume;
+    dev_ctx_p_t->thr_should_run = 0;
+    dev_ctx_p_t->thr_finished = 0;
+    dev_ctx_p[num] = dev_ctx_p_t;
+
+    /* does this new sink have the card we are looking for ? */ /* TODO : factorize this */
+    for (i = 0; i < (sizeof(cards)/sizeof(char*)); i++) {
+        if (!strcmp (cards[i], dev_ctx_p_t->card_name[0])) {
+             /* it did : stop there and succeed */
+             fprintf (stderr, "Found matching sink : %s\n", info->name);
+             /* we return num+1 because '0' is already used */
+             pa_mainloop_quit (dev_ctx_p_t->pa_loop, num+1);
+             pa_context_disconnect (dev_ctx_p_t->pa_context);
+             pa_context_unref (dev_ctx_p_t->pa_context);
+             pa_mainloop_free (dev_ctx_p_t->pa_loop);
+        }
+    }
+}
+
+void _pulse_sink_info_cb (pa_context *context, const pa_sink_info *info,
+				 int eol, void *data) {
+
+    dev_ctx_pulse_T *dev_ctx_p_c = (dev_ctx_pulse_T *)data;
+
+    if (eol != 0)
+        return;
+
+    dev_ctx_p_c->refresh = 0;
+    dev_ctx_p_c->mute = info->mute;
+    dev_ctx_p_c->volume = info->volume;
+}
+
+ /* ---- LOCAL THREADED FUNCTIONS ---- */
+
+void* _pulse_play_thread_fn (void *ctx) {
+
+    dev_ctx_pulse_T *dev_ctx_p_c = (dev_ctx_pulse_T *)ctx;
+    FILE *file = NULL;
+    char *buf = NULL;
+    long size;
+    int error;
+
+    file = fopen (AUDIO_BUFFER, "rb");
+
+    while (dev_ctx_p_c->thr_should_run && file && (access (AUDIO_BUFFER, F_OK) != -1) ) {
+        fseek (file, 0, SEEK_END);
+        size = ftell (file);
+        buf = (char*) realloc (buf, size * sizeof(char));
+
+        fseek (file, 0, SEEK_SET);
+        fread (buf, 1, size, file);
+        fflush (file);
+
+        if (pa_simple_write (dev_ctx_p_c->pa, buf, size*2, &error) < 0)
+            fprintf (stderr, "Error writing to PulseAudio : %s\n", pa_strerror (error));
+        /* pa_simple_drain (dev_ctx_p_c->pa); */
+    }
+    if (buf) free(buf);
+    if (file) fclose(file);
+
+    dev_ctx_p_c->thr_finished = 1;
+    return 0;
+}
diff --git a/bindings/audio/audio-pulse.h b/bindings/audio/audio-pulse.h
new file mode 100644
index 00000000..ad8ff490
--- /dev/null
+++ b/bindings/audio/audio-pulse.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 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_PULSE_H
+#define AUDIO_PULSE_H
+
+#include <sys/time.h>
+#include <pulse/pulseaudio.h>
+#include <pulse/simple.h>
+#include <pulse/error.h>
+
+#include "audio-alsa.h"
+
+typedef struct dev_ctx_pulse dev_ctx_pulse_T;
+typedef struct alsa_info alsa_info_T;
+
+struct dev_ctx_pulse {
+  char *sink_name;
+  char **card_name;
+  pa_mainloop *pa_loop;
+  pa_context *pa_context;
+  pa_simple *pa;
+  pa_cvolume volume;
+  int mute;
+  unsigned char refresh;
+  pthread_t thr;
+  unsigned char thr_should_run;
+  unsigned char thr_finished;
+};
+
+struct alsa_info {
+  char *device;
+  char *synonyms;
+};
+
+unsigned char _pulse_init (const char *, audioCtxHandleT *);
+void _pulse_free (audioCtxHandleT *);
+void _pulse_play (audioCtxHandleT *);
+void _pulse_stop (audioCtxHandleT *);
+unsigned int _pulse_get_volume (audioCtxHandleT *, unsigned int);
+void _pulse_set_volume (audioCtxHandleT *, unsigned int, unsigned int);
+void _pulse_set_volume_all (audioCtxHandleT *, unsigned int);
+unsigned char _pulse_get_mute (audioCtxHandleT *);
+void _pulse_set_mute (audioCtxHandleT *, unsigned char);
+
+void  _pulse_context_cb (pa_context *, void *);
+void  _pulse_sink_list_cb (pa_context *, const pa_sink_info *, int, void *);
+void  _pulse_sink_info_cb (pa_context *, const pa_sink_info *, int, void *);
+void* _pulse_play_thread_fn (void *);
+void  _pulse_refresh_sink (dev_ctx_pulse_T *);
+
+#endif /* AUDIO_PULSE_H */
diff --git a/bindings/audio/export.map b/bindings/audio/export.map
new file mode 100644
index 00000000..0ef1ac79
--- /dev/null
+++ b/bindings/audio/export.map
@@ -0,0 +1 @@
+{ global: afbBindingV1Register; local: *; };