Initial version with dynamic APIs

19 files changed, 543 insertions, 247 deletions

diff --git a/app-controller-submodule b/app-controller-submodule
-Subproject e8b0b3c3cc9b0453b88d1315822fda5963754ae
+Subproject 7af94b8a6f953ed247815bf15049fe951817a21
diff --git a/conf.d/cmake/config.cmake b/conf.d/cmake/config.cmake
index afba6b7..5f5bc23 100644
--- a/conf.d/cmake/config.cmake
+++ b/conf.d/cmake/config.cmake
@@ -131,8 +131,8 @@ list(APPEND link_libraries afb-helpers)
 
 set(CONTROL_SUPPORT_LUA 1)
 add_definitions(-DCONTROL_PLUGIN_PATH="${CMAKE_BINARY_DIR}/package/lib/plugins:${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/lib/plugins")
-add_definitions(-DCONTROL_CONFIG_PATH="${CMAKE_BINARY_DIR}/package/etc:${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/etc")
-add_definitions(-DCONTROL_LUA_PATH="${CMAKE_SOURCE_DIR}/conf.d/project/lua.d:${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/data")
+add_definitions(-DCONTROL_CONFIG_PATH="${CMAKE_SOURCE_DIR}/conf.d/project/etc:${CMAKE_BINARY_DIR}/package/etc:${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/etc")
+add_definitions(-DCONTROL_LUA_PATH="${CMAKE_SOURCE_DIR}/conf.d/project/lua.d:${CMAKE_INSTALL_PREFIX}/${PROJECT_NAME}/var")
 add_definitions(-DCTL_PLUGIN_MAGIC=987456123)
 add_definitions(-DUSE_API_DYN=1 -DAFB_BINDING_VERSION=dyn)
 
diff --git a/conf.d/project/etc/4a-softmixer-config.json b/conf.d/project/etc/4a-softmixer-config.json
deleted file mode 100644
index e67709f..0000000
--- a/conf.d/project/etc/4a-softmixer-config.json
+++ /dev/null
@@ -1,42 +0,0 @@
-{
-    "$schema": "http://iot.bzh/download/public/schema/json/ctl-schema.json",
-    "metadata": {
-        "uid": "Soft Mixer",
-        "version": "1.0",
-        "api": "softmixer",
-        "info": "Soft Mixer emulating hardware mixer"
-    },
-    "resources": [
-        {
-            "uid": "alsa-softmixer",
-            "info": "Map alsa-loop subdevices to 4A HAL streams",
-            "spath":"./plugins/alsa:../conf.d/project/lua.d",
-            "libs": ["alsa-router.ctlso", "softmixer-simple.lua"],
-            "lua": {"prefix":"smix","functions": ["snd_cards", "snd_zones", "snd_loops", "snd_streams"]}
-        }
-    ],
-
-    "onload": [
-        {
-            "uid": "init-soft-mixer",
-            "info": "Initialise Audio Router",
-            "action": "lua://alsa-softmixer#_init_softmixer_"
-        }
-    ],
-
-    "controls": [
-        {
-            "uid": "mixer-config",
-            "action": "lua://alsa-softmixer#_mixer_config_"
-        },
-        {
-            "uid": "snd-cards",
-            "action": "plugin://alsa-softmixer#snd_cards"
-        },
-        {
-            "uid": "snd-zone",
-            "action": "plugin://alsa-softmixer#snd_zones"
-        }
-    ]
-    
-}
diff --git a/conf.d/project/etc/4a-softmixer-test.json b/conf.d/project/etc/4a-softmixer-test.json
new file mode 100644
index 0000000..f363a55
--- /dev/null
+++ b/conf.d/project/etc/4a-softmixer-test.json
@@ -0,0 +1,75 @@
+{
+    "$schema": "http://iot.bzh/download/public/schema/json/ctl-schema.json",
+    "metadata": {
+        "uid": "Soft Mixer",
+        "version": "1.0",
+        "api": "softmixer",
+        "info": "Soft Mixer emulating hardware mixer"
+    },
+    "resources": [
+        {
+            "uid": "softmixer",
+            "info": "Map alsa-loop subdevices to 4A HAL streams",
+            "spath": "./plugins/alsa:../conf.d/project/lua.d",
+            "libs": ["alsa-softmixer.ctlso", "softmixer-simple-test.lua"],
+            "lua": {
+                "prefix": "smix",
+                "functions": ["_mixer_new_"]
+            }
+        }
+    ],
+
+    "onload": [
+        {
+            "uid": "init-soft-mixer",
+            "info": "Initialise Audio Router",
+            "action": "lua://softmixer#_mixer_simple_test_"
+        }
+    ],
+    "controls": [
+        {
+            "uid": "new",
+            "action": "plugin://softmixer#_mixer_new_",
+            "args": {
+                "devices": {
+                    "playback": 0,
+                    "capture": 1
+                },
+                "subdevs": [
+                    {
+                        "subdev": 0,
+                        "numid": 51
+                    },
+                    {
+                        "subdev": 1,
+                        "numid": 57
+                    },
+                    {
+                        "subdev": 2,
+                        "numid": 63
+                    },
+                    {
+                        "subdev": 3,
+                        "numid": 69
+                    },
+                    {
+                        "subdev": 4,
+                        "numid": 75
+                    },
+                    {
+                        "subdev": 5,
+                        "numid": 81
+                    },
+                    {
+                        "subdev": 6,
+                        "numid": 87
+                    },
+                    {
+                        "subdev": 7,
+                        "numid": 93
+                    }
+                ]
+            }
+        }
+    ]
+}
diff --git a/conf.d/project/lua.d/softmixer-simple.lua b/conf.d/project/lua.d/softmixer-simple-test.lua
index e78eacd..6d6dffc 100644
--- a/conf.d/project/lua.d/softmixer-simple.lua
+++ b/conf.d/project/lua.d/softmixer-simple-test.lua
@@ -30,24 +30,14 @@ end
 
 
 -- Display receive arguments and echo them to caller
-function _mixer_config_ (source, args)
+function _mixer_simple_test_ (source, args)
     do
     local error
     local response
 
-    -- ==================== Default rate ===========================
-
-    local audio_defaults = {
-        ["rate"]   = 48000,
-    }  
-
-    -- ======================= Loop PCM ===========================
-
-    local snd_aloop = {
-        ["uid"]     = "Alsa-Loop",
-        ["devpath"] = "/dev/snd/by-path/platform-snd_aloop.0",
+    -- ================== Default Alsa snd-aloop numid and subdev config
+    local aloop = {
         ["devices"] = {["playback"]=0,["capture"]=1},
-        ["params"]  = audio_defaults,
         ["subdevs"] = {
             {["subdev"]= 0, ["numid"]= 51},
             {["subdev"]= 1, ["numid"]= 57},
@@ -60,17 +50,23 @@ function _mixer_config_ (source, args)
         }
     }
 
-    error,response= smix:snd_loops (source, snd_aloop)
-    if (error ~= 0) then 
-        AFB:error (source, "--InLua-- smix:snd_loops fail to attach sndcards=%s", Dump_Table(aloop))
-        goto OnErrorExit
-    else
-        AFB:notice (source, "--InLua-- smix:snd_loops done response=%s\n", Dump_Table(response))
-    end
-    
+    -- ==================== Default rate ===========================
+
+    local audio_defaults = {
+        ["rate"]   = 48000,
+    }  
+
+    -- ======================= Loop PCM ===========================
+    local snd_aloop = {
+        ["uid"]     = "Alsa-Loop",
+        ["devpath"] = "/dev/snd/by-path/platform-snd_aloop.0",       
+        ["params"]  = audio_defaults,
+        ["devices"] = aloop.devices,
+        ["subdevs"] = aloop.subdevs,
+    }
 
-    -- ============================= Sound Cards ===================  
 
+    -- ============================= Sound Cards ===================  
     local snd_yamaha = {
         ["uid"]= "YAMAHA-APU70",
         ["devpath"]= "/dev/snd/by-id/usb-YAMAHA_Corporation_YAMAHA_AP-U70_USB_Audio_00-00",
@@ -91,21 +87,8 @@ function _mixer_config_ (source, args)
         }
     }
 
-     -- group sound card as one multi channels card
-    local sndcards= {
-        snd_yamaha,
-    }
-
-    error,response= smix:snd_cards (source, sndcards)
-    if (error ~= 0) then 
-        AFB:error (source, "--InLua-- smix:snd_cards fail to attach sndcards=%s", Dump_Table(sndcards))
-        goto OnErrorExit
-    else
-        AFB:notice (source, "--InLua-- smix:snd_cards done response=%s\n", Dump_Table(response))
-    end
  
     -- ============================= Zones ===================    
-
     local zone_front= {
         ["uid"]  = "front-seats",
         ["type"] = "playback",
@@ -115,20 +98,7 @@ function _mixer_config_ (source, args)
         }
     }
 
-    local multi_zones = {
-        zone_front,
-    }
-
-    error,response= smix:snd_zones (source, multi_zones)
-    if (error ~= 0) then 
-        AFB:error (source, "--InLua-- smix:snd_zones fail to attach sndcards=%s", Dump_Table(multi_zones))
-        goto OnErrorExit
-    else
-        AFB:notice (source, "--InLua-- smix:snd_zones done response=%s\n", Dump_Table(response))
-    end
-
     -- =================== Audio Stream ============================
-
     local stream_music= {
         ["uid"]   = "multimedia",
         ["zone"]  = "front-seats",
@@ -143,20 +113,24 @@ function _mixer_config_ (source, args)
         ["mute"]  = false,
     }
         
-    local snd_streams = {
-        stream_music,
-        stream_navigation,
+    --- ================ Create Mixer =========================
+    local MyMixer= {
+        ["uid"]="Simple_Mixer",
+        ["backend"] = {snd_yamaha},
+        ["frontend"]= {snd_aloop},
+        ["zones"]   = {zone_front},
+        ["streams"] = {stream_music,stream_navigation},
     }
 
-    error,response= smix:snd_streams (source, snd_streams)
+    local error,response= smix:_mixer_new_ (source, MyMixer)
     if (error ~= 0) then 
-        AFB:error (source, "--InLua-- smix:snd_streams fail to attach sndcards=%s", Dump_Table(aloop))
+        AFB:error (source, "--InLua-- smix:_mixer_new_ fail config=%s", Dump_Table(aloop))
         goto OnErrorExit
     else
-        AFB:notice (source, "--InLua-- smix:streams_loops done response=%s\n", Dump_Table(response))
+        AFB:notice (source, "--InLua-- smix:_mixer_new_ done response=%s\n", Dump_Table(response))
     end
 
-
+  
     -- ================== Happy End =============================
     AFB:notice (source, "--InLua-- _mixer_config_ done")
     return 0 end 
@@ -166,16 +140,3 @@ function _mixer_config_ (source, args)
         AFB:error (source, "--InLua-- snd_attach fail")
         return 1 -- unhappy end --
 end 
-
--- Display receive arguments and echo them to caller
-function _init_softmixer_ (source, args)
-    
-    printf ("*********** in print ")
-    -- create event to push change audio roles to potential listeners
-    _EventHandle=AFB:evtmake(source, "control")
-
-    _mixer_config_ (source, args)
-
-end
-
-printf ("*********** load done ")
diff --git a/mixer-binding/mixer-binding.c b/mixer-binding/mixer-binding.c
index 7f199bc..fe4b284 100644
--- a/mixer-binding/mixer-binding.c
+++ b/mixer-binding/mixer-binding.c
@@ -56,7 +56,7 @@ STATIC int CtrlLoadStaticVerbs (afb_dynapi *apiHandle, AFB_ApiVerbs *verbs) {
     int errcount=0;
 
     for (int idx=0; verbs[idx].verb; idx++) {
-        errcount+= afb_dynapi_add_verb(apiHandle, CtrlApiVerbs[idx].verb, NULL, CtrlApiVerbs[idx].callback, (void*)&CtrlApiVerbs[idx], CtrlApiVerbs[idx].auth, 0);
+        errcount+= afb_dynapi_add_verb(apiHandle, CtrlApiVerbs[idx].verb, CtrlApiVerbs[idx].info, CtrlApiVerbs[idx].callback, (void*)&CtrlApiVerbs[idx], CtrlApiVerbs[idx].auth, 0);
     }
 
     return errcount;
@@ -100,7 +100,8 @@ STATIC int CtrlLoadOneApi (void *cbdata, AFB_ApiT apiHandle) {
     // init API function (does not receive user closure ???
     afb_dynapi_on_init(apiHandle, CtrlInitOneApi);
 
-    afb_dynapi_seal(apiHandle);
+    // should not seal API as each mixer+stream create a new verb
+    // afb_dynapi_seal(apiHandle);
     return err;
 
 OnErrorExit:
diff --git a/nbproject/configurations.xml b/nbproject/configurations.xml
index 96a283e..812b398 100644
--- a/nbproject/configurations.xml
+++ b/nbproject/configurations.xml
@@ -26,10 +26,10 @@
       </df>
       <df name="plugins">
         <df name="alsa">
-          <in>alsa-api-sndcards.c</in>
-          <in>alsa-api-sndloops.c</in>
-          <in>alsa-api-sndstreams.c</in>
-          <in>alsa-api-sndzones.c</in>
+          <in>alsa-api-backend.c</in>
+          <in>alsa-api-frontend.c</in>
+          <in>alsa-api-streams.c</in>
+          <in>alsa-api-zones.c</in>
           <in>alsa-capture.c</in>
           <in>alsa-core-ctl.c</in>
           <in>alsa-core-pcm.c</in>
@@ -367,28 +367,28 @@
         <cTool flags="1">
         </cTool>
       </item>
-      <item path="plugins/alsa/alsa-api-sndcards.c" ex="false" tool="0" flavor2="2">
+      <item path="plugins/alsa/alsa-api-backend.c" ex="false" tool="0" flavor2="2">
         <cTool flags="0">
           <incDir>
             <pElem>/usr/include/lua5.3</pElem>
           </incDir>
         </cTool>
       </item>
-      <item path="plugins/alsa/alsa-api-sndloops.c" ex="false" tool="0" flavor2="2">
+      <item path="plugins/alsa/alsa-api-frontend.c" ex="false" tool="0" flavor2="2">
         <cTool flags="0">
           <incDir>
             <pElem>/usr/include/lua5.3</pElem>
           </incDir>
         </cTool>
       </item>
-      <item path="plugins/alsa/alsa-api-sndstreams.c" ex="false" tool="0" flavor2="2">
+      <item path="plugins/alsa/alsa-api-streams.c" ex="false" tool="0" flavor2="2">
         <cTool flags="0">
           <incDir>
             <pElem>/usr/include/lua5.3</pElem>
           </incDir>
         </cTool>
       </item>
-      <item path="plugins/alsa/alsa-api-sndzones.c" ex="false" tool="0" flavor2="2">
+      <item path="plugins/alsa/alsa-api-zones.c" ex="false" tool="0" flavor2="2">
         <cTool flags="0">
           <incDir>
             <pElem>/usr/include/lua5.3</pElem>
diff --git a/plugins/alsa/CMakeLists.txt b/plugins/alsa/CMakeLists.txt
index 51f4639..687ccb2 100644
--- a/plugins/alsa/CMakeLists.txt
+++ b/plugins/alsa/CMakeLists.txt
@@ -17,7 +17,7 @@
 ###########################################################################
 
 
-PROJECT_TARGET_ADD(alsa-router)
+PROJECT_TARGET_ADD(alsa-softmixer)
 
         file(GLOB SOURCE_FILES "alsa-*.c")
 
diff --git a/plugins/alsa/alsa-api-sndcards.c b/plugins/alsa/alsa-api-backend.c
index daa996a..948d30d 100644
--- a/plugins/alsa/alsa-api-sndcards.c
+++ b/plugins/alsa/alsa-api-backend.c
@@ -38,16 +38,16 @@ OnErrorExit:
 }
 
 PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params) {
-    const char *format=NULL, *access=NULL;
+    const char *format = NULL, *access = NULL;
 
     // some default values
-    params->rate= ALSA_DEFAULT_PCM_RATE;
-    params->channels= 2;
-    params->sampleSize=0;
+    params->rate = ALSA_DEFAULT_PCM_RATE;
+    params->channels = 2;
+    params->sampleSize = 0;
 
-    int error = wrap_json_unpack(paramsJ, "{s?i,s?i, s?s, s?s !}", "rate",&params->rate,"channels", &params->channels, "format",&format, "access",&access);
+    int error = wrap_json_unpack(paramsJ, "{s?i,s?i, s?s, s?s !}", "rate", &params->rate, "channels", &params->channels, "format", &format, "access", &access);
     if (error) goto OnErrorExit;
-    
+
     if (!format) params->format = SND_PCM_FORMAT_S16_LE;
     else if (!strcasecmp(format, "S16_LE")) params->format = SND_PCM_FORMAT_S16_LE;
     else if (!strcasecmp(format, "S16_BE")) params->format = SND_PCM_FORMAT_S16_BE;
@@ -69,8 +69,8 @@ PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *pa
         AFB_ApiNotice(source->api, "ProcessSndParams:%s(params) unsupported format 'S16_LE|S32_L|...' format=%s", uid, format);
         goto OnErrorExit;
     }
-    
-    if (!access) params->access =  SND_PCM_ACCESS_RW_INTERLEAVED;
+
+    if (!access) params->access = SND_PCM_ACCESS_RW_INTERLEAVED;
     else if (!strcasecmp(access, "MMAP_INTERLEAVED")) params->access = SND_PCM_ACCESS_MMAP_INTERLEAVED;
     else if (!strcasecmp(access, "MMAP_NONINTERLEAVED")) params->access = SND_PCM_ACCESS_MMAP_NONINTERLEAVED;
     else if (!strcasecmp(access, "MMAP_COMPLEX")) params->access = SND_PCM_ACCESS_MMAP_COMPLEX;
@@ -78,7 +78,7 @@ PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *pa
     else if (!strcasecmp(access, "RW_NONINTERLEAVED")) params->access = SND_PCM_ACCESS_RW_NONINTERLEAVED;
 
     else {
-        AFB_ApiNotice(source->api, "ProcessSndParams:%s(params) unsupported access 'RW_INTERLEAVED|MMAP_INTERLEAVED|MMAP_COMPLEX' access=%s",uid,  access);
+        AFB_ApiNotice(source->api, "ProcessSndParams:%s(params) unsupported access 'RW_INTERLEAVED|MMAP_INTERLEAVED|MMAP_COMPLEX' access=%s", uid, access);
         goto OnErrorExit;
     }
 
@@ -89,11 +89,19 @@ OnErrorExit:
 }
 
 STATIC int ProcessOneSndCard(CtlSourceT *source, json_object *sndcardJ, AlsaPcmInfoT *snd) {
-    json_object *sinkJ=NULL, *paramsJ = NULL;
+    json_object *sinkJ = NULL, *paramsJ = NULL;
     int error;
 
-    error = wrap_json_unpack(sndcardJ, "{ss,s?s,s?s,s?i,s?i,s?i,so,s?o !}", "uid", &snd->uid, "devpath", &snd->devpath, "cardid", &snd->cardid
-            , "cardidx", &snd->cardidx, "device", &snd->device, "subdev", &snd->subdev, "sink", &sinkJ, "params", &paramsJ);
+    error = wrap_json_unpack(sndcardJ, "{ss,s?s,s?s,s?i,s?i,s?i,so,s?o !}"
+            , "uid", &snd->uid
+            , "devpath", &snd->devpath
+            , "cardid", &snd->cardid
+            , "cardidx", &snd->cardidx
+            , "device", &snd->device
+            , "subdev", &snd->subdev
+            , "sink", &sinkJ
+            , "params", &paramsJ
+            );
     if (error || !snd->uid || !sinkJ || (!snd->devpath && !snd->cardid && snd->cardidx)) {
         AFB_ApiNotice(source->api, "ProcessOneSndCard missing 'uid|path|cardid|cardidx|channels|device|subdev|numid|params' devin=%s", json_object_get_string(sndcardJ));
         goto OnErrorExit;
@@ -106,10 +114,10 @@ STATIC int ProcessOneSndCard(CtlSourceT *source, json_object *sndcardJ, AlsaPcmI
             goto OnErrorExit;
         }
     } else {
-        snd->params.rate= ALSA_DEFAULT_PCM_RATE;
-        snd->params.access= SND_PCM_ACCESS_RW_INTERLEAVED;
-        snd->params.format=SND_PCM_FORMAT_S16_LE;
-        snd->params.channels=2;
+        snd->params.rate = ALSA_DEFAULT_PCM_RATE;
+        snd->params.access = SND_PCM_ACCESS_RW_INTERLEAVED;
+        snd->params.format = SND_PCM_FORMAT_S16_LE;
+        snd->params.channels = 2;
     }
 
     // check snd card is accessible
@@ -157,54 +165,54 @@ OnErrorExit:
     return -1;
 }
 
-CTLP_LUA2C(snd_cards, source, argsJ, responseJ) {
-    AlsaPcmInfoT *sndcards;
-
+PUBLIC int SndBackend(CtlSourceT *source, json_object *argsJ) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     int error;
     size_t count;
 
+    assert(mixerHandle);
+
+    if (mixerHandle->backend) {
+        AFB_ApiError(source->api, "SndBackend: mixer=%s backend already declared  %s", mixerHandle->uid, json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
     switch (json_object_get_type(argsJ)) {
         case json_type_object:
             count = 1;
-            sndcards = calloc(count + 1, sizeof (AlsaPcmInfoT));
-            error = ProcessOneSndCard(source, argsJ, &sndcards[0]);
+            mixerHandle->backend = calloc(count + 1, sizeof (AlsaPcmInfoT));
+            error = ProcessOneSndCard(source, argsJ, &mixerHandle->backend[0]);
             if (error) goto OnErrorExit;
             break;
         case json_type_array:
             count = json_object_array_length(argsJ);
-            sndcards = calloc(count + 1, sizeof (AlsaPcmInfoT));
+            mixerHandle->backend = calloc(count + 1, sizeof (AlsaPcmInfoT));
             for (int idx = 0; idx < count; idx++) {
                 json_object *sndcardJ = json_object_array_get_idx(argsJ, idx);
-                error = ProcessOneSndCard(source, sndcardJ, &sndcards[idx]);
+                error = ProcessOneSndCard(source, sndcardJ, &mixerHandle->backend[idx]);
                 if (error) goto OnErrorExit;
             }
             break;
         default:
-            AFB_ApiError(source->api, "L2C:sndcards: invalid argsJ=  %s", json_object_get_string(argsJ));
+            AFB_ApiError(source->api, "SndBackend: mixer=%s invalid argsJ=  %s", mixerHandle->uid, json_object_get_string(argsJ));
             goto OnErrorExit;
     }
 
-    // register Sound card and multi when needed
-    Softmixer->sndcardCtl = sndcards;
 
     if (count == 1) {
-
         // only one sound card we multi would be useless
-        Softmixer->multiPcm = &sndcards[0];
+        mixerHandle->multiPcm = &mixerHandle->backend[0];
 
     } else {
-        AlsaPcmInfoT *pcmMulti;
-
+        
         // instantiate an alsa multi plugin
-        pcmMulti = AlsaCreateMulti(source, "PcmMulti", 0);
-        if (!pcmMulti) goto OnErrorExit;
+        mixerHandle->multiPcm = AlsaCreateMulti(source, "PcmMulti", 0);
+        if (!mixerHandle->multiPcm) goto OnErrorExit;
 
-        Softmixer->multiPcm = pcmMulti;
     }
-
     return 0;
 
 OnErrorExit:
-    AFB_ApiNotice(source->api, "L2C:sndcards fail to process: %s", json_object_get_string(argsJ));
+    AFB_ApiNotice(source->api, "SndBackend mixer=%s fail to process: %s", mixerHandle->uid, json_object_get_string(argsJ));
     return -1;
 }
diff --git a/plugins/alsa/alsa-api-sndloops.c b/plugins/alsa/alsa-api-frontend.c
index cf7bf55..c01a88b 100644
--- a/plugins/alsa/alsa-api-sndloops.c
+++ b/plugins/alsa/alsa-api-frontend.c
@@ -126,7 +126,7 @@ STATIC int ProcessOneLoop(CtlSourceT *source, json_object *loopJ, AlsaSndLoopT *
             }
             break;
         default:
-            AFB_ApiError(source->api, "L2C:ProcessOneLoop=%s invalid subdevs= %s", loop->uid, json_object_get_string(subdevsJ));
+            AFB_ApiError(source->api, "ProcessOneLoop=%s invalid subdevs= %s", loop->uid, json_object_get_string(subdevsJ));
             goto OnErrorExit;
     }
 
@@ -136,25 +136,42 @@ OnErrorExit:
     return -1;
 }
 
-CTLP_LUA2C(snd_loops, source, argsJ, responseJ) {
+PUBLIC int SndFrontend (CtlSourceT *source, json_object *argsJ) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     int error;
-    AlsaSndLoopT *sndLoop = calloc(1, sizeof (AlsaSndLoopT));
     
-
-    if (json_object_get_type(argsJ) != json_type_object) {
-        AFB_ApiError(source->api, "L2C:sndloops: invalid object type= %s", json_object_get_string(argsJ));
+    assert (mixerHandle);  
+    
+    if (mixerHandle->loop) {
+        AFB_ApiError(source->api, "SndFrontend: mixer=%s SndFrontend already declared %s", mixerHandle->uid, json_object_get_string(argsJ));
+        goto OnErrorExit;     
+    }
+    
+    mixerHandle->loop= calloc(1, sizeof (AlsaSndLoopT));
+    
+    // or syntax purpose array is accepted but frontend should have a single driver entry
+    json_type type= json_object_get_type(argsJ);
+    if (type == json_type_array) {
+        size_t count= json_object_array_length(argsJ);
+        if (count != 1) {
+            AFB_ApiError(source->api, "SndFrontend: mixer=%s frontend only support on input driver args=%s", mixerHandle->uid, json_object_get_string(argsJ));
+            goto OnErrorExit;            
+        }
+        argsJ= json_object_array_get_idx(argsJ,0);
+    } 
+    
+    type= json_object_get_type(argsJ);
+    if (type != json_type_object) {
+        AFB_ApiError(source->api, "SndFrontend: mixer=%s invalid object type= %s", mixerHandle->uid, json_object_get_string(argsJ));
         goto OnErrorExit;
     }
 
-    error = ProcessOneLoop(source, argsJ, sndLoop);
+    error = ProcessOneLoop(source, argsJ, mixerHandle->loop);
     if (error) {
-        AFB_ApiError(source->api, "L2C:sndloops: invalid object= %s", json_object_get_string(argsJ));
+        AFB_ApiError(source->api, "SndFrontend: mixer=%s invalid object= %s", mixerHandle->uid, json_object_get_string(argsJ));
         goto OnErrorExit;
     }
 
-    // register routed into global softmixer handle
-    Softmixer->loopCtl = sndLoop;
-
     return 0;
 
 OnErrorExit:
diff --git a/plugins/alsa/alsa-api-mixer.c b/plugins/alsa/alsa-api-mixer.c
new file mode 100644
index 0000000..f1619c2
--- /dev/null
+++ b/plugins/alsa/alsa-api-mixer.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Fulup Ar Foll <fulup@iot.bzh>
+ *
+ * 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  // needed for vasprintf
+
+#include "alsa-softmixer.h"
+#include <string.h>
+
+// Fulup need to be cleanup with new controller version
+extern Lua2cWrapperT Lua2cWrap;
+
+// API 
+
+static void MixerApiVerbCB(AFB_ReqT request) {
+    json_object *responseJ, *backendJ = NULL, *frontendJ = NULL, *zonesJ = NULL, *streamsJ = NULL;
+    // retrieve action handle from request and execute the request
+    json_object *argsJ = afb_request_json(request);
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) afb_request_get_vcbdata(request);
+    int error;
+    int close = 0;
+
+    CtlSourceT *source = alloca(sizeof (CtlSourceT));
+    source->uid = mixerHandle->uid;
+    source->api = request->dynapi;
+    source->request = request;
+    source->context = mixerHandle;
+
+    error = wrap_json_unpack(argsJ, "{s?b s?o,s?o,s?o,s?o !}"
+            , "close", &close
+            , "backend", &backendJ
+            , "frontend", &frontendJ
+            , "zones", &zonesJ
+            , "streams", &streamsJ
+            );
+    if (error) {
+        AFB_ReqFailF(request, "MixerApiVerbCB", "missing 'uid|backend|frontend|zones|streams' mixer=%s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    // Free attached resources and free mixer
+    if (close) {
+        AFB_ReqFailF(request, "MixerApiVerbCB", "(Fulup) Close action still to be done mixer=%s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    if (backendJ) {
+        error = SndBackend(source, backendJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (frontendJ) {
+        error = SndFrontend(source, frontendJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (zonesJ) {
+        error = SndZones(source, zonesJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (streamsJ) {
+        error = SndStreams(source, streamsJ, &responseJ);
+        if (error) goto OnErrorExit;
+    }
+
+
+    AFB_ReqSucess(request, responseJ, mixerHandle->uid);
+    return;
+
+OnErrorExit:
+    return;
+}
+
+CTLP_LUA2C(_mixer_new_, source, argsJ, responseJ) {
+    SoftMixerHandleT *mixerHandle = calloc(1, sizeof (SoftMixerHandleT));
+    json_object *backendJ = NULL, *frontendJ = NULL, *zonesJ = NULL, *streamsJ = NULL;
+    int error;
+    assert(source->api);
+
+    if (json_object_get_type(argsJ) != json_type_object) {
+        AFB_ApiError(source->api, "_mixer_new_: invalid object type= %s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    error = wrap_json_unpack(argsJ, "{ss,s?s,s?o,s?o,s?o,s?o !}"
+            , "uid", &mixerHandle->uid
+            , "info", &mixerHandle->info
+            , "backend", &backendJ
+            , "frontend", &frontendJ
+            , "zones", &zonesJ
+            , "streams", &streamsJ);
+    if (error) {
+        AFB_ApiNotice(source->api, "_mixer_new_ missing 'uid|backend|frontend|zones|streams' mixer=%s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
+    // make sure string do not get deleted
+    mixerHandle->uid = strdup(mixerHandle->uid);
+    if (mixerHandle->info)mixerHandle->info = strdup(mixerHandle->info);
+
+    // create mixer verb within API.
+    error = afb_dynapi_add_verb(source->api, mixerHandle->uid, mixerHandle->info, MixerApiVerbCB, mixerHandle, NULL, 0);
+    if (error) {
+        AFB_ApiError(source->api, "_mixer_new_ mixer=%s fail to register API verb", mixerHandle->uid);
+        return -1;
+    }
+
+    // make sure sub command get access to mixer handle
+    source->context = mixerHandle;
+
+    if (backendJ) {
+        error = SndBackend(source, backendJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (frontendJ) {
+        error = SndFrontend(source, frontendJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (zonesJ) {
+        error = SndZones(source, zonesJ);
+        if (error) goto OnErrorExit;
+    }
+
+    if (streamsJ) {
+        error = SndStreams(source, streamsJ, responseJ);
+        if (error) goto OnErrorExit;
+    }
+
+    return 0;
+
+OnErrorExit:
+    return -1;
+}
\ No newline at end of file
diff --git a/plugins/alsa/alsa-api-sndstreams.c b/plugins/alsa/alsa-api-streams.c
index e55aeff..42d8ade 100644
--- a/plugins/alsa/alsa-api-sndstreams.c
+++ b/plugins/alsa/alsa-api-streams.c
@@ -29,6 +29,82 @@
 // Fulup need to be cleanup with new controller version
 extern Lua2cWrapperT Lua2cWrap;
 
+typedef struct {
+    const char* verb;
+    AlsaSndStreamT *streams;
+    SoftMixerHandleT *mixer;
+} apiHandleT;
+
+static void StreamApiVerbCB(AFB_ReqT request) {
+    int close=0, error=0, quiet=0;
+    long volume=-1, mute=-1;
+    json_object *responseJ, *argsJ= afb_request_json(request);
+    apiHandleT *handle = (apiHandleT*) afb_request_get_vcbdata(request);
+
+    CtlSourceT *source = alloca(sizeof (CtlSourceT));
+    source->uid = handle->verb;
+    source->api = request->dynapi;
+    source->request = NULL;
+    source->context = NULL;
+
+    error = wrap_json_unpack(argsJ, "{s?b s?b,s?b, s?i !}"
+            , "quiet", &quiet
+            , "close", &close
+            , "mute", &mute
+            , "volume", &volume
+            );
+    if (error) {
+        AFB_ReqFailF(request, "StreamApiVerbCB", "Missing 'close|mute|volume|quiet' args=%s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+    
+    snd_ctl_t *ctlDev= AlsaCtlOpenCtl (source, handle->mixer->loop->cardid);
+    if (!ctlDev) {
+        AFB_ReqFailF(request, "StreamApiVerbCB", "Fail to open sndcard=%s", handle->mixer->loop->cardid);
+        goto OnErrorExit;        
+    }
+    
+    if (close) {
+        AFB_ReqFailF(request,  "StreamApiVerbCB", "(Fulup) Close action still to be done mixer=%s", json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+    
+    if (volume != -1) {
+        error= AlsaCtlNumidSetLong (source, ctlDev, handle->streams->volume, volume);
+        if (error) {
+            AFB_ReqFailF(request, "StreamApiVerbCB", "Fail to set stream volume numid=%d value=%ld", handle->streams->volume, volume);
+            goto OnErrorExit;            
+        }
+    }
+    
+    if (mute != -1) {
+        error= AlsaCtlNumidSetLong (source, ctlDev, handle->streams->volume, !mute);
+        if (error) {
+            AFB_ReqFailF(request, "StreamApiVerbCB", "Fail to set stream volume numid=%d value=%d", handle->streams->volume, !mute);
+            goto OnErrorExit;            
+        }
+    }
+
+    // if not in quiet mode return effective selected control values
+    if (quiet) responseJ=NULL;
+    else {
+        error+= AlsaCtlNumidGetLong (source, ctlDev, handle->streams->volume, &volume);
+        error+= AlsaCtlNumidGetLong (source, ctlDev, handle->streams->mute, &mute);
+        if (error) {
+            AFB_ReqFailF(request, "StreamApiVerbCB", "Fail to get stream numids volume=%ld mute=%ld",volume, mute);
+            goto OnErrorExit;            
+        }
+        wrap_json_pack (&responseJ,"{volume:si, mute:sb}", volume, mute);
+    }
+
+    AFB_ReqSucess(request, responseJ, handle->verb);
+    return;
+
+OnErrorExit:
+    return;
+
+}
+
 STATIC int ProcessOneStream(CtlSourceT *source, json_object *streamJ, AlsaSndStreamT *stream) {
     int error;
     json_object *paramsJ = NULL;
@@ -36,11 +112,17 @@ STATIC int ProcessOneStream(CtlSourceT *source, json_object *streamJ, AlsaSndStr
     // Make sure default runs
     stream->volume = ALSA_DEFAULT_PCM_VOLUME;
     stream->mute = 0;
-
-    error = wrap_json_unpack(streamJ, "{ss,ss,s?i,s?b,s?o !}", "uid", &stream->uid, "zone", &stream->zone, "volume", &stream->volume
-            , "mute", stream->mute, "params", &paramsJ);
+    stream->info = NULL;
+
+    error = wrap_json_unpack(streamJ, "{ss,s?s,ss,s?i,s?b,s?o !}"
+            , "uid", &stream->uid
+            , "info", &stream->info
+            , "zone", &stream->zone
+            , "volume", &stream->volume
+            , "mute", stream->mute
+            , "params", &paramsJ);
     if (error) {
-        AFB_ApiNotice(source->api, "ProcessOneStream missing 'uid|zone|volume|rate|mute|params' stream=%s", json_object_get_string(streamJ));
+        AFB_ApiNotice(source->api, "ProcessOneStream missing 'uid|[info]|zone|[volume]|[mute]|[params]' stream=%s", json_object_get_string(streamJ));
         goto OnErrorExit;
     }
 
@@ -67,16 +149,19 @@ OnErrorExit:
     return -1;
 }
 
-CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
+PUBLIC int SndStreams(CtlSourceT *source, json_object *argsJ, json_object **responseJ) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     AlsaSndStreamT *sndStream;
     int error;
     long value;
     size_t count;
 
+    assert(mixerHandle);
+
     // assert static/global softmixer handle get requited info
-    AlsaSndLoopT *ctlLoop = Softmixer->loopCtl;
+    AlsaSndLoopT *ctlLoop = mixerHandle->loop;
     if (!ctlLoop) {
-        AFB_ApiError(source->api, "L2C:sndstreams: No Loop found [should register snd_loop first]");
+        AFB_ApiError(source->api, "SndStreams: mixer=%s No Loop found [should register snd_loop first]", mixerHandle->uid);
         goto OnErrorExit;
     }
 
@@ -86,7 +171,7 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
             sndStream = calloc(count + 1, sizeof (AlsaSndStreamT));
             error = ProcessOneStream(source, argsJ, &sndStream[0]);
             if (error) {
-                AFB_ApiError(source->api, "L2C:sndstreams: invalid stream= %s", json_object_get_string(argsJ));
+                AFB_ApiError(source->api, "SndStreams: mixer=%s invalid stream= %s", mixerHandle->uid, json_object_get_string(argsJ));
                 goto OnErrorExit;
             }
             break;
@@ -98,13 +183,13 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
                 json_object *sndStreamJ = json_object_array_get_idx(argsJ, idx);
                 error = ProcessOneStream(source, sndStreamJ, &sndStream[idx]);
                 if (error) {
-                    AFB_ApiError(source->api, "sndstreams: invalid stream= %s", json_object_get_string(sndStreamJ));
+                    AFB_ApiError(source->api, "sndstreams: mixer=%s invalid stream= %s", mixerHandle->uid, json_object_get_string(sndStreamJ));
                     goto OnErrorExit;
                 }
             }
             break;
         default:
-            AFB_ApiError(source->api, "L2C:sndstreams: invalid argsJ=  %s", json_object_get_string(argsJ));
+            AFB_ApiError(source->api, "SndStreams: mixer=%s invalid argsJ=  %s", mixerHandle->uid, json_object_get_string(argsJ));
             goto OnErrorExit;
     }
 
@@ -116,10 +201,10 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
         json_object *streamJ, *paramsJ;
 
         // Search for a free loop capture device
-        AFB_ApiNotice(source->api, "L2C:sndstreams stream=%s Start", (char*) sndStream[idx].uid);
+        AFB_ApiNotice(source->api, "SndStreams: mixer=%s stream=%s Start", mixerHandle->uid, (char*) sndStream[idx].uid);
         ctlLoop->scount--;
         if (ctlLoop->scount < 0) {
-            AFB_ApiError(source->api, "L2C:sndstreams no more subdev avaliable in loopback=%s", ctlLoop->uid);
+            AFB_ApiError(source->api, "SndStreams: mixer=%s stream=%s no more subdev avaliable in loopback=%s", mixerHandle->uid, sndStream[idx].uid, ctlLoop->uid);
             goto OnErrorExit;
         }
 
@@ -144,7 +229,7 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
         // Try to create/setup volume control.
         snd_ctl_t* ctlDev = AlsaCrlFromPcm(source, captureDev->handle);
         if (!ctlDev) {
-            AFB_ApiError(source->api, "AlsaCtlRegister [pcm=%s] fail attache sndcard", captureDev->cardid);
+            AFB_ApiError(source->api, "SndStreams: mixer=%s [pcm=%s] fail attache sndcard", mixerHandle->uid, captureDev->cardid);
             goto OnErrorExit;
         }
 
@@ -163,9 +248,9 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
         // create stream and delay pcm openning until vol control is created
         char volName[ALSA_CARDID_MAX_LEN];
         snprintf(volName, sizeof (volName), "vol-%s", sndStream[idx].uid);
-        AlsaPcmInfoT *streamPcm = AlsaCreateStream(source, &sndStream[idx], captureDev, volName, VOL_CONTROL_MAX, 0);
+        AlsaPcmInfoT *streamPcm = AlsaCreateSoftvol(source, &sndStream[idx], captureDev, volName, VOL_CONTROL_MAX, 0);
         if (!streamPcm) {
-            AFB_ApiError(source->api, "L2C:sndstreams:%s(pcm) fail to create stream", sndStream[idx].uid);
+            AFB_ApiError(source->api, "SndStreams: mixer=%s%s(pcm) fail to create stream", mixerHandle->uid, sndStream[idx].uid);
             goto OnErrorExit;
         }
 
@@ -179,14 +264,14 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
         //        snprintf(rateName, sizeof (rateName), "rate-%s", sndStream[idx].uid);
         //        AlsaPcmInfoT *ratePcm= AlsaCreateRate(source, rateName, streamPcm, 1);
         //        if (!ratePcm) {
-        //            AFB_ApiError(source->api, "L2C:sndstreams:%s(pcm) fail to create rate converter", sndStream[idx].uid);
+        //            AFB_ApiError(source->api, "SndStreams: mixer=%s%s(pcm) fail to create rate converter", sndStream[idx].uid);
         //            goto OnErrorExit;
         //        }
 
         // everything is not ready to open capture pcm
         error = snd_pcm_open(&streamPcm->handle, sndStream[idx].uid, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
         if (error) {
-            AFB_ApiError(source->api, "L2C:sndstreams:%s(pcm) fail to open capture", sndStream[idx].uid);
+            AFB_ApiError(source->api, "SndStreams: mixer=%s%s(pcm) fail to open capture", mixerHandle->uid, sndStream[idx].uid);
             goto OnErrorExit;
         }
 
@@ -204,7 +289,7 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
 
         // toggle pause/resume (should be done after pcm_start)
         if ((error = snd_pcm_pause(captureDev->handle, !value)) < 0) {
-            AFB_ApiError(source->api, "L2C:sndstreams [capture=%s] fail to pause error=%s", captureDev->cardid, snd_strerror(error));
+            AFB_ApiError(source->api, "SndStreams: mixer=%s [capture=%s] fail to pause error=%s", mixerHandle->uid, captureDev->cardid, snd_strerror(error));
             goto OnErrorExit;
         }
 
@@ -216,16 +301,36 @@ CTLP_LUA2C(snd_streams, source, argsJ, responseJ) {
         error += wrap_json_pack(&streamJ, "{ss ss si si so}", "uid", streamPcm->uid, "alsa", playbackDev->cardid, "volid", volNumid, "runid", runNumid, "params", paramsJ);
         error += json_object_array_add(*responseJ, streamJ);
         if (error) {
-            AFB_ApiError(source->api, "L2C:sndstreams:%s(stream) fail to prepare response", captureDev->cardid);
+            AFB_ApiError(source->api, "SndStreams: mixer=%s stream=%s fail to prepare response", mixerHandle->uid, captureDev->cardid);
             goto OnErrorExit;
         }
 
+        // create a dedicated verb for this stream compose of mixeruid/streamuid
+        apiHandleT *apiHandle = calloc(1, sizeof (apiHandleT));
+        char apiVerb[128];
+        error = snprintf(apiVerb, sizeof (apiVerb), "%s/%s", mixerHandle->uid, sndStream[idx].uid);
+        if (error == sizeof (apiVerb)) {
+            AFB_ApiError(source->api, "SndStreams mixer=%s fail to register Stream API too long %s/%s", mixerHandle->uid, mixerHandle->uid, sndStream[idx].uid);
+            return -1;
+        }
+
+        apiHandle->mixer = mixerHandle;
+        apiHandle->streams = &sndStream[idx];
+        apiHandle->verb = strdup(apiVerb);
+        error = afb_dynapi_add_verb(source->api, apiHandle->verb, sndStream[idx].info, StreamApiVerbCB, mixerHandle, NULL, 0);
+        if (error) {
+            AFB_ApiError(source->api, "SndStreams mixer=%s fail to register API verb=%s", mixerHandle->uid, apiHandle->verb);
+            return -1;
+        }
+
+        // free tempry resource
         snd_ctl_close(ctlDev);
+
         // Debug Alsa Config 
         //AlsaDumpElemConfig (source, "\n\nAlsa_Config\n------------\n", "pcm");
         //AlsaDumpPcmInfo(source, "\n\nPcm_config\n-----------\n", streamPcm->handle);
 
-        AFB_ApiNotice(source->api, "L2C:sndstreams:%s(stream) OK reponse=%s\n", streamPcm->uid, json_object_get_string(streamJ));
+        AFB_ApiNotice(source->api, "SndStreams: mixer=%s stream=%s OK reponse=%s\n", mixerHandle->uid, streamPcm->uid, json_object_get_string(streamJ));
     }
 
     return 0;
diff --git a/plugins/alsa/alsa-api-sndzones.c b/plugins/alsa/alsa-api-zones.c
index 7ca61ad..de834df 100644
--- a/plugins/alsa/alsa-api-sndzones.c
+++ b/plugins/alsa/alsa-api-zones.c
@@ -26,11 +26,11 @@ extern Lua2cWrapperT Lua2cWrap;
 
 STATIC int ProcessOneChannel(CtlSourceT *source, const char* uid, json_object *channelJ, AlsaPcmChannels *channel) {
     const char*channelUid;
-    
+
     int error = wrap_json_unpack(channelJ, "{ss,si,s?i !}", "target", &channelUid, "channel", &channel->port);
     if (error) goto OnErrorExit;
-    
-    channel->uid=strdup(channelUid);
+
+    channel->uid = strdup(channelUid);
     return 0;
 
 OnErrorExit:
@@ -44,9 +44,13 @@ STATIC int ProcessOneZone(CtlSourceT *source, json_object *zoneJ, AlsaSndZoneT *
     const char* streamType;
     int error;
 
-    error = wrap_json_unpack(zoneJ, "{ss,s?s,so !}", "uid", &zone->uid, "type", &streamType, "mapping", &mappingJ);
+    error = wrap_json_unpack(zoneJ, "{ss,s?s,so !}"
+            , "uid", &zone->uid
+            , "type", &streamType
+            , "mapping", &mappingJ
+            );
     if (error) {
-        AFB_ApiNotice(source->api, "ProcessOneone missing 'uid|type|mapping' zone=%s", json_object_get_string(zoneJ));
+        AFB_ApiNotice(source->api, "ProcessOneZone missing 'uid|type|mapping' zone=%s", json_object_get_string(zoneJ));
         goto OnErrorExit;
     }
 
@@ -59,9 +63,9 @@ STATIC int ProcessOneZone(CtlSourceT *source, json_object *zoneJ, AlsaSndZoneT *
             goto OnErrorExit;
         }
     }
-    
+
     // make sure remain valid even when json object is removed
-    zone->uid= strdup(zone->uid); 
+    zone->uid = strdup(zone->uid);
 
     switch (json_object_get_type(mappingJ)) {
         case json_type_object:
@@ -90,55 +94,63 @@ OnErrorExit:
     return -1;
 }
 
-CTLP_LUA2C(snd_zones, source, argsJ, responseJ) {
-    AlsaSndZoneT *sndZone;
+PUBLIC int SndZones(CtlSourceT *source, json_object *argsJ) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
+    AlsaSndZoneT *zones=NULL;
     int error;
     size_t count;
 
+    assert(mixerHandle);
+
+    if (mixerHandle->routes) {
+        AFB_ApiError(source->api, "SndZones: mixer=%s Zones already registered %s", mixerHandle->uid, json_object_get_string(argsJ));
+        goto OnErrorExit;
+    }
+
     switch (json_object_get_type(argsJ)) {
         case json_type_object:
             count = 1;
-            sndZone = calloc(count + 1, sizeof (AlsaSndZoneT));
-            error = ProcessOneZone(source, argsJ, &sndZone[0]);
+            zones = calloc(count + 1, sizeof (AlsaSndZoneT));
+            error = ProcessOneZone(source, argsJ, &zones[0]);
             if (error) {
-                AFB_ApiError(source->api, "L2C:sndzones: invalid zone= %s", json_object_get_string(argsJ));
+                AFB_ApiError(source->api, "SndZones: mixer=%s invalid zone= %s", mixerHandle->uid, json_object_get_string(argsJ));
                 goto OnErrorExit;
             }
             break;
 
         case json_type_array:
             count = json_object_array_length(argsJ);
-            sndZone = calloc(count + 1, sizeof (AlsaSndZoneT));
+            zones = calloc(count + 1, sizeof (AlsaSndZoneT));
             for (int idx = 0; idx < count; idx++) {
                 json_object *sndZoneJ = json_object_array_get_idx(argsJ, idx);
-                error = ProcessOneZone(source, sndZoneJ, &sndZone[idx]);
+                error = ProcessOneZone(source, sndZoneJ, &zones[idx]);
                 if (error) {
-                    AFB_ApiError(source->api, "L2C:sndzones: invalid zone= %s", json_object_get_string(sndZoneJ));
+                    AFB_ApiError(source->api, "SndZones: mixer=%s invalid zone= %s", mixerHandle->uid, json_object_get_string(sndZoneJ));
                     goto OnErrorExit;
                 }
             }
             break;
         default:
-            AFB_ApiError(source->api, "L2C:sndzones: invalid argsJ=  %s", json_object_get_string(argsJ));
+            AFB_ApiError(source->api, "SndZones: mixer=%s invalid argsJ=  %s", mixerHandle->uid, json_object_get_string(argsJ));
             goto OnErrorExit;
     }
 
     // register routed into global softmixer handle
-    Softmixer->zonePcms = calloc(count+1, sizeof (AlsaPcmInfoT*));
+    mixerHandle->routes= calloc(count + 1, sizeof (AlsaPcmInfoT*));
 
     // instantiate one route PCM per zone with multi plugin as slave
-    for (int idx = 0; sndZone[idx].uid != NULL; idx++) {
-        Softmixer->zonePcms[idx] = AlsaCreateRoute(source, &sndZone[idx], 0);
-        if (!Softmixer->zonePcms[idx]) {
-            AFB_ApiNotice(source->api, "L2C:sndzones fail to create route zone=%s", sndZone[idx].uid);
+    for (int idx = 0; zones[idx].uid != NULL; idx++) {
+        mixerHandle->routes[idx] = AlsaCreateRoute(source, &zones[idx], 0);
+        if (!mixerHandle->routes[idx]) {
+            AFB_ApiNotice(source->api, "SndZones: mixer=%s fail to create route zone=%s", mixerHandle->uid, zones[idx].uid);
             goto OnErrorExit;
         }
     }
     
-    // do not need this handle anymore
-    free (sndZone);
+    free (zones);
     return 0;
 
 OnErrorExit:
+    if (zones) free(zones);
     return -1;
 }
\ No newline at end of file
diff --git a/plugins/alsa/alsa-core-ctl.c b/plugins/alsa/alsa-core-ctl.c
index 9a0b844..f224f92 100644
--- a/plugins/alsa/alsa-core-ctl.c
+++ b/plugins/alsa/alsa-core-ctl.c
@@ -170,6 +170,7 @@ OnErrorExit:
     return NULL;
 }
 
+
 STATIC int CtlElemIdGetNumid(AFB_ApiT api, snd_ctl_t *ctlDev, snd_ctl_elem_id_t *elemId, int *numid) {
     snd_ctl_elem_info_t *elemInfo;
 
diff --git a/plugins/alsa/alsa-plug-multi.c b/plugins/alsa/alsa-plug-multi.c
index 3e82e1e..0dd417d 100644
--- a/plugins/alsa/alsa-plug-multi.c
+++ b/plugins/alsa/alsa-plug-multi.c
@@ -23,15 +23,17 @@
 ALSA_PLUG_PROTO(multi);
 
 PUBLIC AlsaPcmInfoT* AlsaCreateMulti(CtlSourceT *source, const char *pcmUid, int open) {
-
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     snd_config_t *multiConfig, *elemConfig, *slavesConfig, *slaveConfig, *bindingsConfig, *bindingConfig, *pcmConfig;
     int error = 0, channelIdx=0;
     AlsaPcmInfoT *pcmPlug = calloc(1, sizeof (AlsaPcmInfoT));
     pcmPlug->uid   = pcmUid;
     pcmPlug->cardid = pcmUid;
     
-    AlsaPcmInfoT* pcmSlaves=Softmixer->sndcardCtl;
-        if (!Softmixer->sndcardCtl) {
+    assert(mixerHandle);
+    
+    AlsaPcmInfoT* pcmSlaves=mixerHandle->backend;
+    if (!pcmSlaves) {
         AFB_ApiError(source->api, "AlsaCreateMulti: No Sound Card find [should register snd_cards first]");
         goto OnErrorExit;
     }
diff --git a/plugins/alsa/alsa-plug-route.c b/plugins/alsa/alsa-plug-route.c
index 8fa5de8..d2ca223 100644
--- a/plugins/alsa/alsa-plug-route.c
+++ b/plugins/alsa/alsa-plug-route.c
@@ -48,17 +48,20 @@ OnErrorExit:
 }
 
 PUBLIC AlsaPcmInfoT* AlsaCreateRoute(CtlSourceT *source, AlsaSndZoneT *zone, int open) {
-
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     snd_config_t *routeConfig, *elemConfig, *slaveConfig, *tableConfig, *pcmConfig;
     int error = 0;
     AlsaPcmInfoT *pcmPlug = calloc(1, sizeof (AlsaPcmInfoT));
     pcmPlug->uid    = zone->uid;
     pcmPlug->cardid = zone->uid;
+    
+    assert(mixerHandle);
 
-    AlsaPcmInfoT *pcmBackend = Softmixer->sndcardCtl;
-    AlsaPcmInfoT* pcmSlave=Softmixer->multiPcm;
+    AlsaPcmInfoT *pcmBackend = mixerHandle->backend;
+    AlsaPcmInfoT* pcmSlave=mixerHandle->multiPcm;
     if (!pcmBackend || !pcmSlave) {
-        AFB_ApiError(source->api, "AlsaCreateRoute:zone(%s)(zone) No Sound Card Ctl find [should register snd_cards first]", zone->uid);
+        AFB_ApiError(source->api, "AlsaCreateRoute: mixer=%s zone(%s)(zone) No Sound Card Ctl find [should register snd_cards first]"
+                , mixerHandle->uid, zone->uid);
         goto OnErrorExit;
     }
 
diff --git a/plugins/alsa/alsa-plug-vol.c b/plugins/alsa/alsa-plug-vol.c
index dc600f9..09bc51a 100644
--- a/plugins/alsa/alsa-plug-vol.c
+++ b/plugins/alsa/alsa-plug-vol.c
@@ -36,30 +36,32 @@ STATIC AlsaPcmInfoT* SlaveZoneByUid(CtlSourceT *source,  AlsaPcmInfoT **pcmZones
     return NULL;
 }
 
-PUBLIC AlsaPcmInfoT* AlsaCreateStream(CtlSourceT *source, AlsaSndStreamT *stream, AlsaPcmInfoT *ctlControl, const char* ctlName, int max, int open) {
-
+PUBLIC AlsaPcmInfoT* AlsaCreateSoftvol(CtlSourceT *source, AlsaSndStreamT *stream, AlsaPcmInfoT *ctlControl, const char* ctlName, int max, int open) {
+    SoftMixerHandleT *mixerHandle = (SoftMixerHandleT*) source->context;
     snd_config_t *streamConfig, *elemConfig, *slaveConfig, *controlConfig,*pcmConfig;
     int error = 0;
     AlsaPcmInfoT *pcmPlug= calloc(1,sizeof(AlsaPcmInfoT));
 
+    assert (mixerHandle);
+
     // assert static/global softmixer handle get requited info
-    AlsaSndLoopT *ctlLoop = Softmixer->loopCtl;
+    AlsaSndLoopT *ctlLoop = mixerHandle->loop;
     if (!ctlLoop) {
-        AFB_ApiError(source->api, "AlsaCreateStream:%s(stream) No Loop found [should register snd_loop first]",stream->uid);
+        AFB_ApiError(source->api, "AlsaCreateSoftvol:%s(stream) No Loop found [should register snd_loop first]",stream->uid);
         goto OnErrorExit;
     }
 
     // assert static/global softmixer handle get requited info
-    AlsaPcmInfoT **pcmZones = Softmixer->zonePcms;
+    AlsaPcmInfoT **pcmZones = mixerHandle->routes;
     if (!pcmZones) {
-        AFB_ApiError(source->api, "AlsaCreateStream:%s(stream) No Zone found [should register snd_zones first]", stream->uid);
+        AFB_ApiError(source->api, "AlsaCreateSoftvol:%s(stream) No Zone found [should register snd_zones first]", stream->uid);
         goto OnErrorExit;
     }
     
     // search for target zone uid
     AlsaPcmInfoT *pcmSlave= SlaveZoneByUid (source, pcmZones, stream->zone);
     if (!pcmSlave || !pcmSlave->uid) {
-        AFB_ApiError(source->api, "AlsaCreateStream:%s(stream) fail to find Zone=%s", stream->uid, stream->zone);
+        AFB_ApiError(source->api, "AlsaCreateSoftvol:%s(stream) fail to find Zone=%s", stream->uid, stream->zone);
         goto OnErrorExit;  
     }
     
@@ -102,24 +104,24 @@ PUBLIC AlsaPcmInfoT* AlsaCreateStream(CtlSourceT *source, AlsaSndStreamT *stream
     
     if (open) error = _snd_pcm_softvol_open(&pcmPlug->handle, stream->uid, snd_config, streamConfig, SND_PCM_STREAM_PLAYBACK , SND_PCM_NONBLOCK); 
     if (error) {
-        AFB_ApiError(source->api, "AlsaCreateStream:%s(stream) fail to create Plug=%s Slave=%s error=%s", stream->uid, pcmPlug->cardid, pcmSlave->cardid, snd_strerror(error));
+        AFB_ApiError(source->api, "AlsaCreateSoftvol:%s(stream) fail to create Plug=%s Slave=%s error=%s", stream->uid, pcmPlug->cardid, pcmSlave->cardid, snd_strerror(error));
         goto OnErrorExit;
     }
   
     error += snd_config_search(snd_config, "pcm", &pcmConfig);    
     error += snd_config_add(pcmConfig, streamConfig);
     if (error) {
-        AFB_ApiError(source->api, "AlsaCreateStream:%s(stream) fail to add config", stream->uid);
+        AFB_ApiError(source->api, "AlsaCreateSoftvol:%s(stream) fail to add config", stream->uid);
         goto OnErrorExit;
     }
     
     // Debug config & pcm
     //AlsaDumpCtlConfig (source, "plug-stream", streamConfig, 1);
-    AFB_ApiNotice(source->api, "AlsaCreateStream:%s(stream) done\n", stream->uid);
+    AFB_ApiNotice(source->api, "AlsaCreateSoftvol:%s(stream) done\n", stream->uid);
     return pcmPlug;
 
 OnErrorExit:
     AlsaDumpCtlConfig(source, "plug-stream", streamConfig, 1);
-    AFB_ApiNotice(source->api, "AlsaCreateStream:%s(stream) OnErrorExit\n", stream->uid);
+    AFB_ApiNotice(source->api, "AlsaCreateSoftvol:%s(stream) OnErrorExit\n", stream->uid);
     return NULL;
 }
\ No newline at end of file
diff --git a/plugins/alsa/alsa-softmixer.c b/plugins/alsa/alsa-softmixer.c
index 033e87b..4528087 100644
--- a/plugins/alsa/alsa-softmixer.c
+++ b/plugins/alsa/alsa-softmixer.c
@@ -24,12 +24,9 @@
 
 CTLP_LUA_REGISTER("alsa-softmixer")
 
-SoftMixerHandleT *Softmixer;
-
 // Call at initialisation time
 CTLP_ONLOAD(plugin, callbacks) {
-    AFB_ApiDebug(plugin->api, "SoftMixer plugin: uid='%s' 'info='%s'", plugin->uid, plugin->info);
-    Softmixer = calloc(1, sizeof(SoftMixerHandleT));
+    AFB_ApiDebug(plugin->api, "SoftMixer Plugin Registered: uid='%s' 'info='%s'", plugin->uid, plugin->info);    
     return NULL;
 }
 
diff --git a/plugins/alsa/alsa-softmixer.h b/plugins/alsa/alsa-softmixer.h
index e2c9370..7146e78 100644
--- a/plugins/alsa/alsa-softmixer.h
+++ b/plugins/alsa/alsa-softmixer.h
@@ -24,13 +24,14 @@
 #include <afb/afb-binding.h>
 #include <systemd/sd-event.h>
 #include <json-c/json_object.h>
-#include <stdio.h>
 #include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <alsa/asoundlib.h>
 
 #include "ctl-plugin.h"
 #include "wrap-json.h"
 
-#include <alsa/asoundlib.h>
 
 #ifndef PUBLIC
 #define PUBLIC
@@ -104,10 +105,9 @@ typedef struct {
     AlsaPcmInfoT *subdevs;
 } AlsaSndLoopT;
 
-
-
 typedef struct { 
     const char *uid;
+    const char *info;
     const char *zone;
     int volume;
     int mute;
@@ -116,23 +116,20 @@ typedef struct {
 } AlsaSndStreamT;
 
 typedef struct {
-    AlsaSndLoopT *loopCtl;
-    AlsaPcmInfoT *sndcardCtl;
+    const char *uid;
+    const char *info;
+    AlsaSndLoopT *loop;
+    AlsaPcmInfoT *backend;
     AlsaPcmInfoT *multiPcm;
-    AlsaPcmInfoT **zonePcms;
+    AlsaPcmInfoT **routes;
 } SoftMixerHandleT; 
 
-extern SoftMixerHandleT *Softmixer;
-
 // alsa-utils-bypath.c
 PUBLIC snd_ctl_card_info_t* AlsaByPathInfo(CtlSourceT *source, const char *control);
 PUBLIC AlsaPcmInfoT* AlsaByPathOpenPcm(CtlSourceT *source, AlsaPcmInfoT *dev, snd_pcm_stream_t direction);
 PUBLIC snd_ctl_t *AlsaByPathOpenCtl(CtlSourceT *source, AlsaPcmInfoT *dev);
 PUBLIC int AlsaByPathDevid(CtlSourceT *source, AlsaPcmInfoT *dev);
 
-// alsa-api-*.c
-PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params);
-
 // alsa-utils-dump.c
 PUBLIC void AlsaDumpFormats(CtlSourceT *source, snd_pcm_t *pcmHandle);
 PUBLIC char *AlsaDumpPcmUid(snd_pcm_t *pcmHandle, char *buffer, size_t len);
@@ -168,7 +165,14 @@ PUBLIC int AlsaPcmCopy(CtlSourceT *source, AlsaPcmInfoT *pcmIn, AlsaPcmInfoT *pc
 PUBLIC AlsaPcmInfoT* AlsaCreateDmix(CtlSourceT *source, const char* pcmName, AlsaPcmInfoT *pcmSlave, int open);
 PUBLIC AlsaPcmInfoT* AlsaCreateMulti(CtlSourceT *source, const char *pcmName, int open);
 PUBLIC AlsaPcmInfoT* AlsaCreateRoute(CtlSourceT *source, AlsaSndZoneT *zone, int open);
-PUBLIC AlsaPcmInfoT* AlsaCreateStream(CtlSourceT *source, AlsaSndStreamT *stream, AlsaPcmInfoT *ctlControl, const char* ctlName, int max, int open);
+PUBLIC AlsaPcmInfoT* AlsaCreateSoftvol(CtlSourceT *source, AlsaSndStreamT *stream, AlsaPcmInfoT *ctlControl, const char* ctlName, int max, int open);
 PUBLIC AlsaPcmInfoT* AlsaCreateRate(CtlSourceT *source, const char* pcmName, AlsaPcmInfoT *pcmSlave, int open);
 
+// alsa-api-*
+PUBLIC int ProcessSndParams(CtlSourceT *source, const char* uid, json_object *paramsJ, AlsaPcmHwInfoT *params);
+PUBLIC int SndFrontend (CtlSourceT *source, json_object *argsJ);
+PUBLIC int SndBackend (CtlSourceT *source, json_object *argsJ);
+PUBLIC int SndZones (CtlSourceT *source, json_object *argsJ);
+PUBLIC int SndStreams(CtlSourceT *source, json_object *argsJ, json_object **responseJ);
+
 #endif
\ No newline at end of file