Merge branch 'master' of github.com:iotbzh/afb-daemon

7 files changed, 125 insertions, 99 deletions

diff --git a/plugins/CMakeLists.txt b/plugins/CMakeLists.txt
index c60e3527..20d27b81 100644
--- a/plugins/CMakeLists.txt
+++ b/plugins/CMakeLists.txt
@@ -1,6 +1,6 @@
 ADD_SUBDIRECTORY(afm-main-plugin)
 ADD_SUBDIRECTORY(session)
 ADD_SUBDIRECTORY(samples)
-#ADD_SUBDIRECTORY(audio)
+ADD_SUBDIRECTORY(audio)
 #ADD_SUBDIRECTORY(radio)
 #ADD_SUBDIRECTORY(media)
diff --git a/plugins/audio/audio-alsa.c b/plugins/audio/audio-alsa.c
index bc777fce..6240d39d 100644
--- a/plugins/audio/audio-alsa.c
+++ b/plugins/audio/audio-alsa.c
@@ -17,6 +17,7 @@
  */
 
 #include "audio-api.h"
+#include "audio-alsa.h"
 
 snd_mixer_selem_channel_id_t SCHANNELS[8] = {
  SND_MIXER_SCHN_FRONT_LEFT,
@@ -42,7 +43,7 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
     int num, i;
 
     if (snd_pcm_open (&dev, name, SND_PCM_STREAM_PLAYBACK, 0) < 0)
-        return -1;
+        return 0;
 
     snd_pcm_hw_params_malloc (&params);
     snd_pcm_hw_params_any (dev, params);
@@ -52,14 +53,14 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
     snd_pcm_hw_params_set_channels (dev, params, ctx->channels);
     if (snd_pcm_hw_params (dev, params) < 0) {
         snd_pcm_hw_params_free (params);
-        return -1;
+        return 0;
     }
     snd_pcm_prepare (dev);
 
     snd_mixer_open (&mixer, 0);
     if (snd_mixer_attach (mixer, name) < 0) {
         snd_pcm_hw_params_free (params);
-        return -1;
+        return 0;
     }
     snd_mixer_selem_register (mixer, NULL, NULL);
     snd_mixer_load (mixer);
@@ -107,7 +108,7 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
     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))
-            return -1;
+            return 0;
     }
     num++;
 
@@ -129,10 +130,11 @@ PUBLIC unsigned char _alsa_init (const char *name, audioCtxHandleT *ctx) {
         ctx->volume[i] = _alsa_get_volume (num, i);
     ctx->mute = _alsa_get_mute (num);
     ctx->idx = num;
+    ctx->name = strdup (name);
 
     if (verbose) fprintf (stderr, "Successfully initialized ALSA backend.\n");
 
-    return 0;
+    return 1;
 }
 
 PUBLIC void _alsa_free (const char *name) {
@@ -153,7 +155,7 @@ PUBLIC void _alsa_free (const char *name) {
     }
 }
 
-PUBLIC void _alsa_play (unsigned int num) {
+PUBLIC 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)
@@ -164,7 +166,7 @@ PUBLIC void _alsa_play (unsigned int num) {
     pthread_create (&dev_ctx_a[num]->thr, NULL, _alsa_play_thread_fn, (void*)dev_ctx_a[num]);
 }
 
-PUBLIC void _alsa_stop (unsigned int num) {
+PUBLIC void _alsa_stop (int num) {
 
     if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->thr_should_run)
         return;
@@ -178,41 +180,41 @@ PUBLIC void _alsa_stop (unsigned int num) {
     pthread_join (dev_ctx_a[num]->thr, NULL);
 }
 
-PUBLIC int _alsa_get_volume (unsigned int num, unsigned int channel) {
+PUBLIC 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;
+        return 0;
 
     snd_mixer_selem_get_playback_volume (dev_ctx_a[num]->mixer_elm, SCHANNELS[channel], &dev_ctx_a[num]->vol);
 
     return (int)(dev_ctx_a[num]->vol*100)/dev_ctx_a[num]->vol_max;
 }
 
-PUBLIC void _alsa_set_volume (unsigned int num, unsigned int channel, int vol) {
+PUBLIC 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 ||
-        0 > vol > 100)
+        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);
 
 }
 
-PUBLIC void _alsa_set_volume_all (unsigned int num, int vol) {
+PUBLIC void _alsa_set_volume_all (int num, unsigned int vol) {
 
     if (!dev_ctx_a || !dev_ctx_a[num] || !dev_ctx_a[num]->mixer_elm ||
-        0 > vol > 100)
+        vol > 100)
 
     snd_mixer_selem_set_playback_volume_all (dev_ctx_a[num]->mixer_elm, (vol*dev_ctx_a[num]->vol_max)/100);
 }
 
-PUBLIC unsigned char _alsa_get_mute (unsigned int num) {
+PUBLIC 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;
+        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);
@@ -228,12 +230,12 @@ PUBLIC unsigned char _alsa_get_mute (unsigned int num) {
         return (unsigned char)!mute;
 }
 
-PUBLIC void _alsa_set_mute (unsigned int num, unsigned char tomute) {
+PUBLIC 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 < 0)
+    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) {
@@ -248,7 +250,7 @@ PUBLIC void _alsa_set_mute (unsigned int num, unsigned char tomute) {
         snd_mixer_selem_set_playback_switch_all (elm_m, !mute);
 }
 
-PUBLIC void _alsa_set_rate (unsigned int num, unsigned int rate) {
+PUBLIC void _alsa_set_rate (int num, unsigned int rate) {
 
     if (!dev_ctx_a || !dev_ctx_a[num])
         return;
@@ -256,7 +258,7 @@ PUBLIC void _alsa_set_rate (unsigned int num, unsigned int rate) {
     snd_pcm_hw_params_set_rate_near (dev_ctx_a[num]->dev, dev_ctx_a[num]->params, &rate, 0);
 }
 
-PUBLIC void _alsa_set_channels (unsigned int num, unsigned int channels) {
+PUBLIC void _alsa_set_channels (int num, unsigned int channels) {
 
     if (!dev_ctx_a || !dev_ctx_a[num])
         return;
diff --git a/plugins/audio/audio-alsa.h b/plugins/audio/audio-alsa.h
index 9b9ee21c..5ac8ea49 100644
--- a/plugins/audio/audio-alsa.h
+++ b/plugins/audio/audio-alsa.h
@@ -22,6 +22,7 @@
 #include <pthread.h>
 #include <alsa/asoundlib.h>
 
+#include "audio-api.h"
 #include "local-def.h"
 
 typedef struct dev_ctx_alsa dev_ctx_alsa_T;
@@ -39,9 +40,17 @@ struct dev_ctx_alsa {
   unsigned char thr_finished;
 };
 
+PUBLIC unsigned char _alsa_init (const char *, audioCtxHandleT *);
+PUBLIC void _alsa_free (const char *);
+PUBLIC void _alsa_play (int);
+PUBLIC void _alsa_stop (int);
+PUBLIC unsigned int _alsa_get_volume (int, unsigned int);
+PUBLIC void _alsa_set_volume (int, unsigned int, unsigned int);
+PUBLIC void _alsa_set_volume_all (int, unsigned int);
+PUBLIC unsigned char _alsa_get_mute (int);
+PUBLIC void _alsa_set_mute (int, unsigned char);
+PUBLIC void _alsa_set_channels (int, unsigned int);
 STATIC void* _alsa_play_thread_fn (void *);
-PUBLIC int _alsa_get_volume (unsigned int, unsigned int);
-PUBLIC unsigned char _alsa_get_mute (unsigned int);
 
 static struct dev_ctx_alsa **dev_ctx_a = NULL;
 
diff --git a/plugins/audio/audio-api.c b/plugins/audio/audio-api.c
index 9c9da251..3f80ef02 100644
--- a/plugins/audio/audio-api.c
+++ b/plugins/audio/audio-api.c
@@ -16,23 +16,33 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _GNU_SOURCE
+#include <stdlib.h>
+
 #include "audio-api.h"
+#include "audio-alsa.h"
+#ifdef HAVE_PULSE
+#include "audio-pulse.h"
+#endif
+
+#include "afb-plugin.h"
+#include "afb-req-itf.h"
 
 /* ------ BACKEND FUNCTIONS ------- */
 
 void _backend_init (const char *name, audioCtxHandleT *ctx) {
 
     char *backend_env = getenv ("AFB_AUDIO_OUTPUT");
-    unsigned char res = -1;
+    unsigned char res = 0;
 
 # ifdef HAVE_PULSE
-    if (!backend_env || (strcasecmp (backend_env, "Alsa") != 0))
+    if (!backend_env || (strcasecmp (backend_env, "Pulse") == 0))
         res = _pulse_init (name, ctx);
-    if (res < 0)
+    if (!res)
 #endif
     res = _alsa_init (name, ctx);
 
-    if (res < 0 && verbose)
+    if (!res && verbose)
         fprintf (stderr, "Could not initialize Audio backend\n");
 }
 
@@ -41,7 +51,7 @@ void _backend_free (audioCtxHandleT *ctx) {
 # ifdef HAVE_PULSE
     if (ctx->audio_dev) _pulse_free (ctx); else
 # endif
-    _alsa_free (ctx->idx);
+    _alsa_free (ctx->name);
 }
 
 void _backend_play (audioCtxHandleT *ctx) {
@@ -60,7 +70,7 @@ void _backend_stop (audioCtxHandleT *ctx) {
     _alsa_stop (ctx->idx);
 }
 
-int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
+unsigned int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
 
 # ifdef HAVE_PULSE
     if (ctx->audio_dev) return _pulse_get_volume (ctx, channel); else
@@ -68,7 +78,7 @@ int _backend_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
     return _alsa_get_volume (ctx->idx, channel);
 }
 
-void _backend_set_volume (audioCtxHandleT *ctx, unsigned int channel, int vol) {
+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
@@ -76,7 +86,7 @@ void _backend_set_volume (audioCtxHandleT *ctx, unsigned int channel, int vol) {
     _alsa_set_volume (ctx->idx, channel, vol);
 }
 
-void _backend_set_volume_all (audioCtxHandleT *ctx, int 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
@@ -147,31 +157,31 @@ STATIC void freeAudio (void *context) {
 
 /* ------ PUBLIC PLUGIN FUNCTIONS --------- */
 
-STATIC json_object* init (AFB_request *request) {        /* AFB_SESSION_CHECK */
+STATIC void init (struct afb_req request) {        /* AFB_SESSION_CHECK */
 
     json_object *jresp;
-    int idx;
 
     /* create a private client context */
-    if (!request->context)
-        request->context = initAudioCtx();
+    if (!request.context)
+        request.context = initAudioCtx();
 
-    _backend_init("default", request->context);
+    _backend_init("default", request.context);
 
     jresp = json_object_new_object();
-    json_object_object_add (jresp, "info", json_object_new_string ("Audio initialised"));
-    return (jresp);
+    json_object_object_add (jresp, "info", json_object_new_string ("Audio initialized"));
+
+    afb_req_success (request, jresp, "Audio initiliazed");
 }
 
-STATIC json_object* volume (AFB_request *request) {      /* AFB_SESSION_CHECK */
+STATIC void volume (struct afb_req request) {      /* AFB_SESSION_CHECK */
 
-    audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
-    const char *value = getQueryValue (request, "value");
+    audioCtxHandleT *ctx = (audioCtxHandleT*)request.context;
+    const char *value = afb_req_argument (request, "value");
     json_object *jresp;
-    int volume[8], i;
+    unsigned int volume[8], i;
     char *volume_i;
     char volume_str[256];
-    int len_str = 0;
+    size_t len_str = 0;
 
     /* no "?value=" parameter : return current state */
     if (!value) {
@@ -188,12 +198,13 @@ STATIC json_object* volume (AFB_request *request) {      /* AFB_SESSION_CHECK */
     else {
         volume_i = strdup (value);
         volume_i = strtok (volume_i, ",");
-        volume[0] = atoi (volume_i);
+        volume[0] = (unsigned int) atoi (volume_i);
 
-        if ((100 < volume[0])||(volume[0] < 0)) {
+        if (100 < volume[0]) {
             free (volume_i);
-            request->errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
-            return (jsonNewMessage (AFB_FAIL, "Volume must be between 0 and 100"));
+            //request.errcode = MHD_HTTP_SERVICE_UNAVAILABLE;
+            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]);
@@ -204,10 +215,10 @@ STATIC json_object* volume (AFB_request *request) {      /* AFB_SESSION_CHECK */
             /* 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) < 0) {
+            if (!volume_i || 100 < atoi(volume_i) || atoi(volume_i) < 0) {
                ctx->volume[i] = _backend_get_volume (ctx, i);
             } else {
-               ctx->volume[i] = atoi(volume_i);
+               ctx->volume[i] = (unsigned int) atoi(volume_i);
                _backend_set_volume (ctx, i, ctx->volume[i]);
             }
             len_str = strlen(volume_str);
@@ -217,13 +228,13 @@ STATIC json_object* volume (AFB_request *request) {      /* AFB_SESSION_CHECK */
         json_object_object_add (jresp, "volume", json_object_new_string(volume_str));
     }
 
-    return jresp;
+    afb_req_success (request, jresp, "Audio - Volume changed");
 }
 
-STATIC json_object* channels (AFB_request *request) {    /* AFB_SESSION_CHECK */
+STATIC void channels (struct afb_req request) {    /* AFB_SESSION_CHECK */
 
-    audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
-    const char *value = getQueryValue (request, "value");
+    audioCtxHandleT *ctx = (audioCtxHandleT*)request.context;
+    const char *value = afb_req_argument (request, "value");
     json_object *jresp = json_object_new_object();
     char channels_str[256];
 
@@ -235,20 +246,20 @@ STATIC json_object* channels (AFB_request *request) {    /* AFB_SESSION_CHECK */
 
     /* "?value=" parameter, set channels */
     else {
-        ctx->channels = atoi (value);
+        ctx->channels = (unsigned int) atoi (value);
         _backend_set_channels (ctx, ctx->channels);
 
         snprintf (channels_str, sizeof(channels_str), "%d", ctx->channels);
         json_object_object_add (jresp, "channels", json_object_new_string (channels_str));
     }
 
-    return jresp;
+    afb_req_success (request, jresp, "Audio - Channels set");
 }
 
-STATIC json_object* mute (AFB_request *request) {        /* AFB_SESSION_CHECK */
+STATIC void mute (struct afb_req request) {        /* AFB_SESSION_CHECK */
 
-    audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
-    const char *value = getQueryValue (request, "value");
+    audioCtxHandleT *ctx = (audioCtxHandleT*)request.context;
+    const char *value = afb_req_argument (request, "value");
     json_object *jresp = json_object_new_object();
 
     /* no "?value=" parameter : return current state */
@@ -275,13 +286,13 @@ STATIC json_object* mute (AFB_request *request) {        /* AFB_SESSION_CHECK */
         json_object_object_add (jresp, "mute", json_object_new_string ("off"));
     }
 
-    return jresp;
+    afb_req_success (request, jresp, "Audio - Mute set");
 }
 
-STATIC json_object* play (AFB_request *request) {        /* AFB_SESSION_CHECK */
+STATIC void play (struct afb_req request) {        /* AFB_SESSION_CHECK */
 
-    audioCtxHandleT *ctx = (audioCtxHandleT*)request->context;
-    const char *value = getQueryValue (request, "value");
+    audioCtxHandleT *ctx = (audioCtxHandleT*)request.context;
+    const char *value = afb_req_argument (request, "value");
     json_object *jresp = json_object_new_object();
 
     /* no "?value=" parameter : return current state */
@@ -307,31 +318,26 @@ STATIC json_object* play (AFB_request *request) {        /* AFB_SESSION_CHECK */
         json_object_object_add (jresp, "play", json_object_new_string ("off"));
     }
 
-    return jresp;
+    afb_req_success (request, jresp, "Audio - Play");
 }
 
-STATIC json_object* ping (AFB_request *request) {         /* AFB_SESSION_NONE */
-    return jsonNewMessage(AFB_SUCCESS, "Ping Binder Daemon - Radio API");
+STATIC void ping (struct afb_req request) {         /* AFB_SESSION_NONE */
+    afb_req_success (request, NULL, "Audio - Ping success");
 }
 
-STATIC AFB_restapi pluginApis[]= {
-  {"init"    , AFB_SESSION_CHECK,  (AFB_apiCB)init      , "Audio API - init"},
-  {"volume"  , AFB_SESSION_CHECK,  (AFB_apiCB)volume    , "Audio API - volume"},
-  {"channels", AFB_SESSION_CHECK,  (AFB_apiCB)channels  , "Audio API - channels"},
-  {"mute"    , AFB_SESSION_CHECK,  (AFB_apiCB)mute      , "Audio API - mute"},
-  {"play"    , AFB_SESSION_CHECK,  (AFB_apiCB)play      , "Audio API - play"},
-  {"ping"    , AFB_SESSION_NONE,   (AFB_apiCB)ping      , "Audio API - ping"},
+STATIC const struct AFB_restapi pluginApis[]= {
+  {"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}
 };
 
-PUBLIC AFB_plugin *pluginRegister () {
-    AFB_plugin *plugin = malloc (sizeof(AFB_plugin));
-    plugin->type   = AFB_PLUGIN_JSON;
-    plugin->info   = "Application Framework Binder - Audio plugin";
-    plugin->prefix = "audio";        
-    plugin->apis   = pluginApis;
-
-    plugin->freeCtxCB = (AFB_freeCtxCB)freeAudio;
-
-    return (plugin);
+STATIC const struct AFB_plugin plug_desc = {
+    .type   = AFB_PLUGIN_JSON,
+    .info   = "Application Framework Binder - Audio plugin",
+    .prefix = "audio",
+    .apis   = pluginApis
 };
diff --git a/plugins/audio/audio-api.h b/plugins/audio/audio-api.h
index 77d6e152..6edc9357 100644
--- a/plugins/audio/audio-api.h
+++ b/plugins/audio/audio-api.h
@@ -19,11 +19,6 @@
 #ifndef AUDIO_API_H
 #define AUDIO_API_H
 
-#include "audio-alsa.h"
-#ifdef HAVE_PULSE
-#include "audio-pulse.h"
-#endif
-
 /* global plugin handle, should store everything we may need */
 typedef struct {
   int devCount;
@@ -32,8 +27,9 @@ typedef struct {
 /* 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           */
-  int volume[8];            /* audio volume (8 channels) : 0-100              */
+  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)             */
diff --git a/plugins/audio/audio-pulse.c b/plugins/audio/audio-pulse.c
index ceffcf7d..31ebdba4 100644
--- a/plugins/audio/audio-pulse.c
+++ b/plugins/audio/audio-pulse.c
@@ -16,6 +16,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _GNU_SOURCE
+#include <stdio.h>
+
 #include "audio-api.h"
 #include "audio-pulse.h"
 
@@ -56,7 +59,7 @@ PUBLIC unsigned char _pulse_init (const char *name, audioCtxHandleT *ctx) {
 
         if (ret == -1) {
             if (verbose) fprintf (stderr, "Stopping PulseAudio backend...\n");
-            return -1;
+            return 0;
         }
         if (ret >= 0) {
             /* found a matching sink from callback */
@@ -68,26 +71,26 @@ PUBLIC unsigned char _pulse_init (const char *name, audioCtxHandleT *ctx) {
     }
     /* fail if we found no matching sink */
     if (!ctx->audio_dev)
-      return -1;
+      return 0;
 
     /* make the client context aware of current card state */
     ctx->mute = (unsigned char)dev_ctx_p[ret]->mute;
     ctx->channels = (unsigned int)dev_ctx_p[ret]->volume.channels;
     for (i = 0; i < ctx->channels; i++)
-        ctx->volume[i] = (int)dev_ctx_p[ret]->volume.values[i];
+        ctx->volume[i] = dev_ctx_p[ret]->volume.values[i];
     ctx->idx = ret;
 
     /* 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 = ctx->channels;
+    pa_spec->channels = (uint8_t)ctx->channels;
 
     if (!(pa = pa_simple_new (NULL, "afb-audio-plugin", PA_STREAM_PLAYBACK, dev_ctx_p[ret]->sink_name,
                               "afb-audio-output", pa_spec, NULL, NULL, &error))) {
         fprintf (stderr, "Error opening PulseAudio sink %s : %s\n",
                           dev_ctx_p[ret]->sink_name, pa_strerror(error));
-        return -1;
+        return 0;
     }
     dev_ctx_p[ret]->pa = pa;
     free (pa_spec);
@@ -96,7 +99,7 @@ PUBLIC unsigned char _pulse_init (const char *name, audioCtxHandleT *ctx) {
 
     if (verbose) fprintf (stderr, "Successfully initialized PulseAudio backend.\n");
 
-    return 0;
+    return 1;
 }
 
 PUBLIC void _pulse_free (audioCtxHandleT *ctx) {
@@ -150,19 +153,19 @@ PUBLIC void _pulse_stop (audioCtxHandleT *ctx) {
     pthread_join (dev_ctx_p_c->thr, NULL);
 }
 
-PUBLIC int _pulse_get_volume (audioCtxHandleT *ctx, unsigned int channel) {
+PUBLIC 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;
+        return 0;
 
     _pulse_refresh_sink (dev_ctx_p_c);
 
-    return (int)dev_ctx_p_c->volume.values[channel];
+    return dev_ctx_p_c->volume.values[channel];
 }
 
-PUBLIC void _pulse_set_volume (audioCtxHandleT *ctx, unsigned int channel, int vol) {
+PUBLIC 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;
@@ -178,7 +181,7 @@ PUBLIC void _pulse_set_volume (audioCtxHandleT *ctx, unsigned int channel, int v
     _pulse_refresh_sink (dev_ctx_p_c);
 }
 
-PUBLIC void _pulse_set_volume_all (audioCtxHandleT *ctx, int vol) {
+PUBLIC 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;
@@ -199,7 +202,7 @@ PUBLIC 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;
+        return 0;
 
     _pulse_refresh_sink (dev_ctx_p_c);
 
diff --git a/plugins/audio/audio-pulse.h b/plugins/audio/audio-pulse.h
index fc18d9c0..7405fb84 100644
--- a/plugins/audio/audio-pulse.h
+++ b/plugins/audio/audio-pulse.h
@@ -49,6 +49,16 @@ struct alsa_info {
   char *synonyms;
 };
 
+PUBLIC unsigned char _pulse_init (const char *, audioCtxHandleT *);
+PUBLIC void _pulse_free (audioCtxHandleT *);
+PUBLIC void _pulse_play (audioCtxHandleT *);
+PUBLIC void _pulse_stop (audioCtxHandleT *);
+PUBLIC unsigned int _pulse_get_volume (audioCtxHandleT *, unsigned int);
+PUBLIC void _pulse_set_volume (audioCtxHandleT *, unsigned int, unsigned int);
+PUBLIC void _pulse_set_volume_all (audioCtxHandleT *, unsigned int);
+PUBLIC unsigned char _pulse_get_mute (audioCtxHandleT *);
+PUBLIC void _pulse_set_mute (audioCtxHandleT *, unsigned char);
+
 STATIC void  _pulse_context_cb (pa_context *, void *);
 STATIC void  _pulse_sink_list_cb (pa_context *, const pa_sink_info *, int, void *);
 STATIC void  _pulse_sink_info_cb (pa_context *, const pa_sink_info *, int, void *);