Clarify internals hal functions and files names

The purpose of this commit is to have of a more standard way to
name files and functions used to generate/handle hal api
(generated from hal json configuration file).
It occurred to me that 'hal-controller' was not a good name
because it is harder for people who don't know about
the app-controller to understanded what is the purpose of
these files/functions.

It was renamed to 'internal-hal' because it's about hal
that are all handle/load by hal-manager in opposition of
external-hal that are independant binding/binder that can register
themselves to hal-manager.


BUG-AGL: SPEC-2329

Change-Id: I11b7efe64ec474b004a2a15ed8969b9db95d428f
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

10 files changed, 2661 insertions, 0 deletions

diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.c b/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.c
new file mode 100644
index 0000000..d092ddf
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.c
@@ -0,0 +1,633 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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
+
+#include <stdio.h>
+#include <string.h>
+
+#include <wrap-json.h>
+
+#include <alsa/asoundlib.h>
+
+#include <afb/afb-binding.h>
+
+#include <ctl-config.h>
+
+#include "4a-hal-utilities-alsa-data.h"
+#include "4a-hal-utilities-data.h"
+
+#include "4a-internals-hal-alsacore-link.h"
+#include "4a-internals-hal-value-handler.h"
+
+/*******************************************************************************
+ *		Map to alsa control types				       *
+ ******************************************************************************/
+
+static const char *const snd_ctl_elem_type_names[] = {
+	[SND_CTL_ELEM_TYPE_NONE]= "NONE",
+	[SND_CTL_ELEM_TYPE_BOOLEAN]= "BOOLEAN",
+	[SND_CTL_ELEM_TYPE_INTEGER]="INTEGER",
+	[SND_CTL_ELEM_TYPE_ENUMERATED]="ENUMERATED",
+	[SND_CTL_ELEM_TYPE_BYTES]="BYTES",
+	[SND_CTL_ELEM_TYPE_IEC958]="IEC958",
+	[SND_CTL_ELEM_TYPE_INTEGER64]="INTEGER64",
+};
+
+/*******************************************************************************
+ *		Alsa control types map from string function		       *
+ ******************************************************************************/
+
+snd_ctl_elem_type_t InternalHalMapsAlsaTypeToEnum(const char *label)
+{
+	int idx;
+	static int length = sizeof(snd_ctl_elem_type_names) / sizeof(char *);
+
+	for(idx = 0; idx < length; idx++) {
+		if(! strcasecmp(label, snd_ctl_elem_type_names[idx]))
+			return (snd_ctl_elem_type_t) idx;
+	}
+
+	return SND_CTL_ELEM_TYPE_NONE;
+}
+
+/*******************************************************************************
+ *		Internals HAL - Alsacore calls funtions			       *
+ ******************************************************************************/
+
+int InternalHalGetCardIdByCardPath(afb_api_t apiHandle, char *devPath)
+{
+	int errorToReturn, cardId;
+
+	char *returnedError = NULL, *returnedInfo = NULL;
+
+	json_object *toSendJ, *responseJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Api handle not available");
+		return -1;
+	}
+
+	if(! devPath) {
+		AFB_API_ERROR(apiHandle, "Dev path is not available");
+		return -2;
+	}
+
+	wrap_json_pack(&toSendJ, "{s:s}", "cardPath", devPath);
+
+	if(afb_api_call_sync(apiHandle,
+			     ALSACORE_API,
+			     ALSACORE_GETINFO_VERB,
+			     toSendJ,
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      ALSACORE_GETINFO_VERB,
+			      ALSACORE_API,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		errorToReturn = -3;
+	}
+	else if(! responseJ) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but no response was returned",
+			      ALSACORE_GETINFO_VERB,
+			      ALSACORE_API);
+		errorToReturn = -4;
+	}
+	else if(! json_object_is_type(responseJ, json_type_object)) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but the returned response is invalid",
+			      ALSACORE_GETINFO_VERB,
+			      ALSACORE_API);
+		errorToReturn = -5;
+	}
+	else if(wrap_json_unpack(responseJ, "{s:i}", "cardNb", &cardId)) {
+		AFB_API_WARNING(apiHandle, "Response card id is not present/valid");
+		errorToReturn = -6;
+	}
+	else {
+		return cardId;
+	}
+
+	if(responseJ)
+		json_object_put(responseJ);
+
+	free(returnedError);
+	free(returnedInfo);
+
+	return errorToReturn;
+}
+
+int InternalHalSubscribeToAlsaCardEvent(afb_api_t apiHandle, char *cardId)
+{
+	int err = 0;
+
+	char *returnedError = NULL, *returnedInfo = NULL;
+
+	json_object *subscribeQueryJ, *responseJ = NULL;
+
+	wrap_json_pack(&subscribeQueryJ, "{s:s}", "devid", cardId);
+	if(afb_api_call_sync(apiHandle,
+			     ALSACORE_API,
+			     ALSACORE_SUBSCRIBE_VERB,
+			     subscribeQueryJ,
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      ALSACORE_SUBSCRIBE_VERB,
+			      ALSACORE_API,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		err = -1;
+	}
+
+	if(responseJ)
+		json_object_put(responseJ);
+
+	free(returnedError);
+	free(returnedInfo);
+
+	return err;
+}
+
+int InternalHalGetAlsaCtlInfo(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *currentAlsaCtl, json_object **returnedDataJ)
+{
+	int err = 0;
+
+	char *returnedError = NULL, *returnedInfo = NULL;
+
+	json_object *queryJ, *responseJ = NULL;
+
+	*returnedDataJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Api handle not available");
+		return -1;
+	}
+
+	if(! cardId) {
+		AFB_API_ERROR(apiHandle, "Card id is not available");
+		return -2;
+	}
+
+	if(! currentAlsaCtl) {
+		AFB_API_ERROR(apiHandle, "Alsa control data structure is not available");
+		return -3;
+	}
+
+	if(currentAlsaCtl->name && currentAlsaCtl->numid > 0) {
+		AFB_API_DEBUG(apiHandle,
+			     "Both a control name (%s) and a control uid (%i) are specified, control uid will be used",
+			     currentAlsaCtl->name,
+			     currentAlsaCtl->numid);
+	}
+
+	if(currentAlsaCtl->numid > 0) {
+		wrap_json_pack(&queryJ, "{s:s s:i s:i}", "devid", cardId, "ctl", currentAlsaCtl->numid, "mode", 3);
+	}
+	else if(currentAlsaCtl->name) {
+		wrap_json_pack(&queryJ, "{s:s s:s s:i}", "devid", cardId, "ctl", currentAlsaCtl->name, "mode", 3);
+	}
+	else {
+		AFB_API_ERROR(apiHandle, "Need at least a control name or a control id");
+		return -4;
+	}
+
+	if(afb_api_call_sync(apiHandle,
+			     ALSACORE_API,
+			     ALSACORE_CTLGET_VERB,
+			     queryJ,
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      ALSACORE_CTLGET_VERB,
+			      ALSACORE_API,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		free(returnedError);
+		free(returnedInfo);
+		return -5;
+	}
+	else if(! responseJ) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but no response was returned",
+			      ALSACORE_CTLGET_VERB,
+			      ALSACORE_API);
+		return -6;
+	}
+	else if(currentAlsaCtl->name && wrap_json_unpack(responseJ, "{s:i}", "id", &currentAlsaCtl->numid)) {
+		AFB_API_ERROR(apiHandle, "Can't find alsa control 'id' from control 'name': '%s' on device '%s'", currentAlsaCtl->name, cardId);
+		json_object_put(responseJ);
+		return -7;
+	}
+
+	*returnedDataJ = responseJ;
+
+	return err;
+}
+
+int InternalHalUpdateAlsaCtlProperties(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *currentAlsaCtl)
+{
+	int err = 0;
+
+	json_object *returnedDataJ;
+
+	err = InternalHalGetAlsaCtlInfo(apiHandle, cardId, currentAlsaCtl, &returnedDataJ);
+	if(err) {
+		return err;
+	}
+	// TBD JAI : get dblinear/dbminmax/... values
+	else if(wrap_json_unpack(returnedDataJ,
+				 "{s:{s?:i s?:i s?:i s?:i s?:i}}",
+				 "ctl",
+				 "type", (int *) &currentAlsaCtl->alsaCtlProperties.type,
+				 "count", &currentAlsaCtl->alsaCtlProperties.count,
+				 "min", &currentAlsaCtl->alsaCtlProperties.minval,
+				 "max", &currentAlsaCtl->alsaCtlProperties.maxval,
+				 "step", &currentAlsaCtl->alsaCtlProperties.step)) {
+		AFB_API_ERROR(apiHandle,
+			      "Didn't succeed to get control %i properties on device '%s' : '%s'",
+			      currentAlsaCtl->numid,
+			      cardId,
+			      json_object_get_string(returnedDataJ));
+
+		err = -8;
+	}
+
+	if(returnedDataJ)
+		json_object_put(returnedDataJ);
+
+	return err;
+}
+
+int InternalHalGetAlsaCtlValues(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *currentAlsaCtl, json_object **returnedValuesJ)
+{
+	int err = 0;
+
+	json_object *returnedDataJ = NULL, *returnedValuesArrayJ;
+
+	*returnedValuesJ = NULL;
+
+	err = InternalHalGetAlsaCtlInfo(apiHandle, cardId, currentAlsaCtl, &returnedDataJ);
+	if(err) {
+		return err;
+	}
+	else if(wrap_json_unpack(returnedDataJ, "{s:o}", "val", &returnedValuesArrayJ)) {
+		AFB_API_ERROR(apiHandle,
+			      "Didn't succeed to get control %i values on device '%s' : '%s'",
+			      currentAlsaCtl->numid,
+			      cardId,
+			      json_object_get_string(returnedValuesArrayJ));
+
+		err = -8;
+	}
+	else if(! json_object_is_type(returnedValuesArrayJ, json_type_array)) {
+		AFB_API_ERROR(apiHandle,
+			      "Json returned by control %i values on device '%s' are not an array ('%s')",
+			      currentAlsaCtl->numid,
+			      cardId,
+			      json_object_get_string(returnedValuesArrayJ));
+
+		err = -9;
+	}
+
+	if(! err)
+		*returnedValuesJ = json_object_get(returnedValuesArrayJ);
+
+	if(returnedDataJ)
+		json_object_put(returnedDataJ);
+
+	return err;
+}
+
+int InternalHalSetAlsaCtlValue(afb_api_t apiHandle, char *cardId, int ctlId, json_object *valuesJ)
+{
+	int err = 0;
+
+	char *returnedError = NULL, *returnedInfo = NULL;
+
+	json_object *queryJ, *responseJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Api handle not available");
+		return -1;
+	}
+
+	if(! cardId) {
+		AFB_API_ERROR(apiHandle, "Card id is not available");
+		return -2;
+	}
+
+	if(ctlId <= 0) {
+		AFB_API_ERROR(apiHandle, "Alsa control id is not valid");
+		return -3;
+	}
+
+	if(! valuesJ) {
+		AFB_API_ERROR(apiHandle, "Values to set json is not available");
+		return -4;
+	}
+
+	wrap_json_pack(&queryJ, "{s:s s:{s:i s:o}}", "devid", cardId, "ctl", "id", ctlId, "val", json_object_get(valuesJ));
+
+	if(afb_api_call_sync(apiHandle,
+			     ALSACORE_API,
+			     ALSACORE_CTLSET_VERB,
+			     queryJ,
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      ALSACORE_CTLSET_VERB,
+			      ALSACORE_API,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		err = -5;
+	}
+
+	if(responseJ)
+		json_object_put(responseJ);
+
+	free(returnedError);
+	free(returnedInfo);
+
+	return err;
+}
+
+int InternalHalCreateAlsaCtl(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *alsaCtlToCreate)
+{
+	int err = 0;
+
+	char *returnedError = NULL, *returnedInfo = NULL;
+
+	json_object *queryJ, *responseJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Api handle not available");
+		return -1;
+	}
+
+	if(! cardId) {
+		AFB_API_ERROR(apiHandle, "Card id is not available");
+		return -2;
+	}
+
+	if(! alsaCtlToCreate) {
+		AFB_API_ERROR(apiHandle, "Alsa control data structure is not available");
+		return -3;
+	}
+
+	if(! alsaCtlToCreate->alsaCtlCreation) {
+		AFB_API_ERROR(apiHandle, "Alsa control data for creation structure is not available");
+		return -4;
+	}
+
+	wrap_json_pack(&queryJ, "{s:s s:{s:i s:s s?:i s?:i s?:i s:i s:i}}",
+				"devid", cardId,
+				"ctl",
+				"ctl", -1,
+				"name", alsaCtlToCreate->name,
+				"min", alsaCtlToCreate->alsaCtlCreation->minval,
+				"max", alsaCtlToCreate->alsaCtlCreation->maxval,
+				"step", alsaCtlToCreate->alsaCtlCreation->step,
+				"type", (int) alsaCtlToCreate->alsaCtlCreation->type,
+				"count", alsaCtlToCreate->alsaCtlCreation->count);
+
+	if(afb_api_call_sync(apiHandle,
+			     ALSACORE_API,
+			     ALSACORE_ADDCTL_VERB,
+			     queryJ,
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      ALSACORE_ADDCTL_VERB,
+			      ALSACORE_API,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		err = -5;
+	}
+	else if(! responseJ) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but no response was returned",
+			      ALSACORE_ADDCTL_VERB,
+			      ALSACORE_API);
+		err = -6;
+	}
+	else if(wrap_json_unpack(responseJ, "{s:i}", "id", &alsaCtlToCreate->numid)) {
+		AFB_API_ERROR(apiHandle,
+			      "Can't get create id from %s of %s api",
+			      ALSACORE_ADDCTL_VERB,
+			      ALSACORE_API);
+		err = -7;
+	}
+	else if(wrap_json_unpack(responseJ, "{s:o}", "ctl", NULL)) {
+		AFB_API_WARNING(apiHandle, "Control %s was already present but has been updated", alsaCtlToCreate->name);
+	}
+
+	if(responseJ)
+		json_object_put(responseJ);
+
+	free(returnedError);
+	free(returnedInfo);
+
+	return err;
+}
+
+/*******************************************************************************
+ *		Internals HAL - Alsacore controls request callback	       *
+ ******************************************************************************/
+
+void InternalHalActionOnAlsaCtl(afb_req_t request)
+{
+	char cardIdString[6];
+
+	afb_api_t apiHandle;
+
+	CtlConfigT *ctrlConfig;
+
+	struct HalData *currentHalData;
+	struct InternalHalAlsaMap *currentAlsaCtl;
+
+	json_object *requestJson,
+		    *valueJ,
+		    *convertedJ,
+		    *answerJ,
+		    *previousControlValuesJ,
+		    *normalizedPreviousControlValuesJ,
+		    *appliedControlValuesJ,
+		    *normalizedAppliedControlValuesJ;
+
+	if(! (apiHandle = afb_req_get_api(request))) {
+		afb_req_fail(request, "api_handle", "Can't get current hal controller api handle");
+		return;
+	}
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle))) {
+		afb_req_fail(request, "hal_controller_config", "Can't get current hal controller config");
+		return;
+	}
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData) {
+		afb_req_fail(request, "hal_controller_data", "Can't get current hal controller data");
+		return;
+	}
+
+	if(currentHalData->status == HAL_STATUS_UNAVAILABLE) {
+		afb_req_fail(request, "hal_unavailable", "Seems that hal is not available");
+		return;
+	}
+
+	currentAlsaCtl = (struct InternalHalAlsaMap *) afb_req_get_vcbdata(request);
+	if(! currentAlsaCtl) {
+		afb_req_fail(request, "alsa_control_data", "Can't get current alsa control data");
+		return;
+	}
+
+	if(currentAlsaCtl->ctl.numid <= 0) {
+		afb_req_fail(request, "alsa_control_id", "Alsa control id is not valid");
+		return;
+	}
+
+	snprintf(cardIdString, 6, "hw:%i", currentHalData->sndCardId);
+
+	if(InternalHalGetAlsaCtlValues(apiHandle, cardIdString, &currentAlsaCtl->ctl, &previousControlValuesJ)) {
+		afb_req_fail_f(request, "previous_values", "Error when trying to get unchanged alsa control values");
+		return;
+	}
+	else if(InternalHalConvertJsonValues(apiHandle,
+					     &currentAlsaCtl->ctl.alsaCtlProperties,
+					     previousControlValuesJ,
+					     &normalizedPreviousControlValuesJ,
+					     CONVERSION_ALSACORE_TO_NORMALIZED)) {
+		afb_req_fail_f(request,
+			       "request_json",
+			       "Error when trying to normalize unchanged alsa control values json '%s'",
+			       json_object_get_string(previousControlValuesJ));
+		json_object_put(previousControlValuesJ);
+		return;
+	}
+
+	if(! (requestJson = afb_req_json(request))) {
+		wrap_json_pack(&answerJ,
+			       "{s:o}",
+			       "current", normalizedPreviousControlValuesJ);
+		afb_req_success(request, answerJ, "Current controls values");
+		json_object_put(previousControlValuesJ);
+		return;
+	}
+
+	if(! json_object_is_type(requestJson, json_type_object)) {
+		afb_req_fail_f(request, "request_json", "Request json is not valid '%s'", json_object_get_string(requestJson));
+		json_object_put(previousControlValuesJ);
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+
+	if(wrap_json_unpack(requestJson, "{s:o}", "value", &valueJ)) {
+		afb_req_fail_f(request,
+			       "request_json", "Error when trying to get request value object inside request '%s'",
+			       json_object_get_string(requestJson));
+		json_object_put(previousControlValuesJ);
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+
+	if((! json_object_is_type(valueJ, json_type_string)) &&
+	   InternalHalConvertJsonValues(apiHandle,
+					&currentAlsaCtl->ctl.alsaCtlProperties,
+					valueJ,
+					&convertedJ,
+					CONVERSION_NORMALIZED_TO_ALSACORE)) {
+		afb_req_fail_f(request,
+			       "request_json",
+			       "Error when trying to convert request values '%s'",
+			       json_object_get_string(valueJ));
+		json_object_put(previousControlValuesJ);
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+	else if(json_object_is_type(valueJ, json_type_string) &&
+		InternalHalChangePreviousValuesUsingJson(apiHandle,
+							 &currentAlsaCtl->ctl.alsaCtlProperties,
+							 valueJ,
+							 previousControlValuesJ,
+							 &convertedJ)) {
+		afb_req_fail_f(request,
+			       "previous_values",
+			       "Error when trying to generate changed alsa control values (values : '%s', previous :'%s')",
+			       json_object_get_string(valueJ),
+			       json_object_get_string(previousControlValuesJ));
+		json_object_put(previousControlValuesJ);
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+
+	json_object_put(previousControlValuesJ);
+
+	if(InternalHalSetAlsaCtlValue(apiHandle, cardIdString, currentAlsaCtl->ctl.numid, convertedJ)) {
+		afb_req_fail_f(request,
+			       "alsa_control_call_error",
+			       "Error while trying to set value on alsa control %i, device '%s', converted message '%s'",
+			       currentAlsaCtl->ctl.numid,
+			       cardIdString,
+			       json_object_get_string(convertedJ));
+		json_object_put(convertedJ);
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+
+	json_object_put(convertedJ);
+
+	if(InternalHalGetAlsaCtlValues(apiHandle, cardIdString, &currentAlsaCtl->ctl, &appliedControlValuesJ)) {
+		afb_req_fail_f(request, "applied_values", "Error when trying to get applied alsa control values");
+		json_object_put(normalizedPreviousControlValuesJ);
+		return;
+	}
+	else if(InternalHalConvertJsonValues(apiHandle,
+					     &currentAlsaCtl->ctl.alsaCtlProperties,
+					     appliedControlValuesJ,
+					     &normalizedAppliedControlValuesJ,
+					     CONVERSION_ALSACORE_TO_NORMALIZED)) {
+		afb_req_fail_f(request,
+			       "request_json",
+			       "Error when trying to normalize applied values json '%s'",
+			       json_object_get_string(appliedControlValuesJ));
+		json_object_put(normalizedPreviousControlValuesJ);
+		json_object_put(appliedControlValuesJ);
+		return;
+	}
+
+	json_object_put(appliedControlValuesJ);
+
+	wrap_json_pack(&answerJ,
+		       "{s:o, s:o}",
+		       "previous", normalizedPreviousControlValuesJ,
+		       "current", normalizedAppliedControlValuesJ);
+
+	afb_req_success(request, answerJ, "Values correctly applied on alsa control");
+}
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.h b/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.h
new file mode 100644
index 0000000..065e017
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-alsacore-link.h
@@ -0,0 +1,53 @@
+/*
+* Copyright (C) 2018 "IoT.bzh"
+* Author Jonathan Aillet <jonathan.aillet@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.
+*/
+
+#ifndef _INTERNALS_HAL_ALSACORE_LINK_INCLUDE_
+#define _INTERNALS_HAL_ALSACORE_LINK_INCLUDE_
+
+#include <stdio.h>
+
+#include <wrap-json.h>
+
+#include <alsa/asoundlib.h>
+
+#include <afb/afb-binding.h>
+
+#include <ctl-config.h>
+
+#include "4a-hal-utilities-alsa-data.h"
+
+#define ALSACORE_API			"alsacore"
+#define ALSACORE_SUBSCRIBE_VERB		"subscribe"
+#define ALSACORE_GETINFO_VERB		"infoget"
+#define ALSACORE_CTLGET_VERB		"ctlget"
+#define ALSACORE_CTLSET_VERB		"ctlset"
+#define ALSACORE_ADDCTL_VERB		"addcustomctl"
+
+// Alsa control types map from string function
+snd_ctl_elem_type_t InternalHalMapsAlsaTypeToEnum(const char *label);
+
+// Internals HAL alsacore calls funtions
+int InternalHalGetCardIdByCardPath(afb_api_t apiHandle, char *devPath);
+int InternalHalSubscribeToAlsaCardEvent(afb_api_t apiHandle, char *cardId);
+int InternalHalUpdateAlsaCtlProperties(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *currentAlsaCtl);
+int InternalHalSetAlsaCtlValue(afb_api_t apiHandle, char *cardId, int ctlId, json_object *valuesJ);
+int InternalHalCreateAlsaCtl(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaCtl *alsaCtlToCreate);
+
+// Internals HAL alsacore controls request callback
+void InternalHalActionOnAlsaCtl(afb_req_t request);
+
+#endif /* _INTERNALS_HAL_ALSACORE_LINK_INCLUDE_ */
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.c b/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.c
new file mode 100644
index 0000000..94891b8
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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
+
+#include <stdio.h>
+#include <string.h>
+
+#include <filescan-utils.h>
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include <ctl-config.h>
+
+#include "4a-hal-utilities-verbs-loader.h"
+#include "4a-internals-hal-api-loader.h"
+#include "4a-internals-hal-alsacore-link.h"
+#include "4a-internals-hal-cb.h"
+#include "4a-internals-hal-mixer-link.h"
+
+// Default api to print log when apihandle not available
+afb_api_t AFB_default;
+
+/*******************************************************************************
+ *		Json parsing functions using controller			       *
+ ******************************************************************************/
+
+// Config Section definition
+static CtlSectionT ctrlSectionsDefault[] =
+{
+	{ .key = "resources",		.loadCB = PluginConfig },
+	{ .key = "halmixer",		.loadCB = InternalHalHalMixerConfig },
+	{ .key = "onload",		.loadCB = OnloadConfig },
+	{ .key = "controls",		.loadCB = ControlConfig },
+	{ .key = "events",		.loadCB = EventConfig },
+	{ .key = "halmap",		.loadCB = InternalHalHalMapConfig },
+	{ .key = NULL }
+};
+
+/*******************************************************************************
+ *		Dynamic HAL verbs' functions				       *
+ ******************************************************************************/
+
+// Every HAL export the same API & Interface Mapping from SndCard to AudioLogic is done through alsaHalSndCardT
+static afb_verb_t InternalHalApiStaticVerbs[] =
+{
+	/* VERB'S NAME			FUNCTION TO CALL		SHORT DESCRIPTION */
+	{ .verb = "info",		.callback = InternalHalInfo,		.info = "List available streams/playbacks/captures/controls for this api" },
+	{ .verb = "subscribe",		.callback = InternalHalSubscribe,	.info = "Subscribe to event(s) for values changes (streams/playbacks/captures/controls) for this api" },
+	{ .verb = "unsubscribe",	.callback = InternalHalUnsubscribe,	.info = "Unsubscribe to event(s) for values changes (streams/playbacks/captures/controls) for this api" },
+	{ .verb = NULL }		// Marker for end of the array
+};
+
+/*******************************************************************************
+ *		Dynamic API functions for internals hal			       *
+ ******************************************************************************/
+
+static int InternalHalInitOneApi(afb_api_t apiHandle)
+{
+	CtlConfigT *ctrlConfig;
+	struct HalData *currentHalData;
+
+	if(! apiHandle)
+		return -1;
+
+	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
+	AFB_default = apiHandle;
+
+	// Retrieve section config from api handle
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle)))
+		return -2;
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData)
+		return -3;
+
+	// Fill HalDatadata structure
+	currentHalData->internal = 1;
+
+	currentHalData->sndCardPath = (char *) ctrlConfig->uid;
+	currentHalData->info = (char *) ctrlConfig->info;
+
+	currentHalData->author = (char *) ctrlConfig->author;
+	currentHalData->version = (char *) ctrlConfig->version;
+	currentHalData->date = (char *) ctrlConfig->date;
+
+	currentHalData->internalHalData->apiHandle = apiHandle;
+	currentHalData->internalHalData->ctrlConfig = ctrlConfig;
+
+	currentHalData->sndCardId = InternalHalGetCardIdByCardPath(apiHandle, currentHalData->sndCardPath);
+
+	currentHalData->internalHalData->streamUpdates = afb_api_make_event(apiHandle, HAL_STREAM_UPDATES_EVENT_NAME);
+	if(! currentHalData->internalHalData->streamUpdates)
+		return -4;
+
+	if(currentHalData->sndCardId < 0)
+		currentHalData->status = HAL_STATUS_UNAVAILABLE;
+	else
+		currentHalData->status = HAL_STATUS_AVAILABLE;
+
+	// TBD JAI: handle refresh of hal status for dynamic card (/dev/by-id)
+
+	return CtlConfigExec(apiHandle, ctrlConfig);
+}
+
+static int InternalHalLoadOneApi(void *cbdata, afb_api_t apiHandle)
+{
+	int err;
+	CtlConfigT *ctrlConfig;
+	CtlSectionT *ctrlCurrentSections;
+
+	if(! cbdata || ! apiHandle)
+		return -1;
+
+	ctrlConfig = (CtlConfigT*) cbdata;
+
+	// Save closure as api's data context
+	afb_api_set_userdata(apiHandle, ctrlConfig);
+
+	// Add static controls verbs
+	if(HalUtlLoadVerbs(apiHandle, InternalHalApiStaticVerbs)) {
+		AFB_API_ERROR(apiHandle, "Load Section : fail to register static V2 verbs");
+		return 1;
+	}
+
+	ctrlCurrentSections = malloc(sizeof(ctrlSectionsDefault));
+	memcpy(ctrlCurrentSections, ctrlSectionsDefault, sizeof(ctrlSectionsDefault));
+
+	// Load section for corresponding Api
+	if((err = CtlLoadSections(apiHandle, ctrlConfig, ctrlCurrentSections)))
+		return err;
+
+	// Declare an event manager for this Api
+	afb_api_on_event(apiHandle, InternalHalDispatchApiEvent);
+
+	// Init Api function (does not receive user closure ???)
+	afb_api_on_init(apiHandle, InternalHalInitOneApi);
+
+	return 0;
+}
+
+int InternalHalCreateApi(afb_api_t apiHandle, char *path, struct HalMgrData *halMgrData)
+{
+	CtlConfigT *ctrlConfig;
+	struct HalData *currentHalData;
+
+	if(! apiHandle || ! path || ! halMgrData)
+		return -1;
+
+	// Create one Api per file
+	ctrlConfig = CtlLoadMetaData(apiHandle, path);
+	if(! ctrlConfig) {
+		AFB_API_ERROR(apiHandle, "No valid control config file in:\n-- %s", path);
+		return -2;
+	}
+
+	if(! ctrlConfig->api) {
+		AFB_API_ERROR(apiHandle, "API Missing from metadata in:\n-- %s", path);
+		return -3;
+	}
+
+	// Allocation of current hal controller data
+	currentHalData = HalUtlAddHalToHalList(&halMgrData->halDataList);
+	if(! currentHalData)
+		return -4;
+
+	currentHalData->apiName = (char *) ctrlConfig->api;
+
+	// Stores hal data in controller config
+	setExternalData(ctrlConfig, (void *) currentHalData);
+
+	// Allocation of the structure that will be used to store internal hal data
+	currentHalData->internalHalData = calloc(1, sizeof(struct InternalHalData));
+
+	// Create one API
+	if(! afb_api_new_api(apiHandle, ctrlConfig->api, ctrlConfig->info, 1, InternalHalLoadOneApi, ctrlConfig))
+		return -5;
+
+	return 0;
+}
+
+int InternalHalCreateAllApi(afb_api_t apiHandle, struct HalMgrData *halMgrData)
+{
+	int index, status = 0;
+	char *dirList, *fileName, *fullPath;
+	char filePath[CONTROL_MAXPATH_LEN];
+
+	filePath[CONTROL_MAXPATH_LEN - 1] = '\0';
+
+	json_object *configJ, *entryJ;
+
+	if(! apiHandle || ! halMgrData)
+		return -1;
+
+	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
+	AFB_default = apiHandle;
+
+	AFB_API_NOTICE(apiHandle, "Begining to create all APIs");
+
+	dirList = getenv("CONTROL_CONFIG_PATH");
+	if(! dirList)
+		dirList = CONTROL_CONFIG_PATH;
+
+	configJ = CtlConfigScan(dirList, "hal");
+	if(! configJ) {
+		AFB_API_WARNING(apiHandle, "No hal-(binder-middle-name)*.json config file(s) found in %s, 4a-hal-manager will only works with external hal", dirList);
+		return 0;
+	}
+
+	// We load 1st file others are just warnings
+	for(index = 0; index < (int) json_object_array_length(configJ); index++) {
+		entryJ = json_object_array_get_idx(configJ, index);
+
+		if(wrap_json_unpack(entryJ, "{s:s, s:s !}", "fullpath", &fullPath, "filename", &fileName)) {
+			AFB_API_ERROR(apiHandle, "HOOPs invalid JSON entry = %s", json_object_get_string(entryJ));
+			return -2;
+		}
+
+		strncpy(filePath, fullPath, sizeof(filePath) - 1);
+		strncat(filePath, "/", sizeof(filePath) - 1);
+		strncat(filePath, fileName, sizeof(filePath) - 1);
+
+		if(InternalHalCreateApi(apiHandle, filePath, halMgrData) < 0)
+			status--;
+	}
+
+	return status;
+}
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.h b/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.h
new file mode 100644
index 0000000..fa878e2
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-api-loader.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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.
+ */
+
+#ifndef _INTERNALS_HAL_API_LOADER_INCLUDE_
+#define _INTERNALS_HAL_API_LOADER_INCLUDE_
+
+#include <stdio.h>
+
+#include <afb/afb-binding.h>
+
+#include "4a-hal-utilities-data.h"
+
+// Verbs that can be use to create api
+int InternalHalCreateApi(afb_api_t apiHandle, char *path, struct HalMgrData *halMgrData);
+int InternalHalCreateAllApi(afb_api_t apiHandle, struct HalMgrData *halMgrData);
+
+#endif /* _INTERNALS_HAL_API_LOADER_INCLUDE_ */
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-cb.c b/4a-hal/4a-internals-hal/4a-internals-hal-cb.c
new file mode 100644
index 0000000..0102d8d
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-cb.c
@@ -0,0 +1,790 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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
+
+#include <stdio.h>
+#include <string.h>
+
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include "4a-hal-utilities-data.h"
+
+#include "4a-internals-hal-cb.h"
+#include "4a-internals-hal-alsacore-link.h"
+#include "4a-internals-hal-mixer-link.h"
+#include "4a-internals-hal-value-handler.h"
+
+/*******************************************************************************
+ *	Internals HAL Event handler function				       *
+ ******************************************************************************/
+
+void InternalHalDispatchApiEvent(afb_api_t apiHandle, const char *evtLabel, json_object *eventJ)
+{
+	int numid, idx = 0, cardidx;
+
+	CtlConfigT *ctrlConfig;
+	CtlSourceT source;
+
+	struct HalData *currentHalData;
+	struct InternalHalAlsaMapT *currentHalAlsaCtlsT;
+
+	json_object *valuesJ, *normalizedValuesJ;
+
+	AFB_API_DEBUG(apiHandle, "Evtname=%s [msg=%s]", evtLabel, json_object_get_string(eventJ));
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle))) {
+		AFB_API_ERROR(apiHandle, "Can't get current internal hal controller config");
+		return;
+	}
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData) {
+		AFB_API_WARNING(apiHandle, "Can't get current internal hal controller data");
+		return;
+	}
+
+	// Extract sound card index from event
+	while(evtLabel[idx] != '\0' && evtLabel[idx] != ':')
+		idx++;
+
+	if(evtLabel[idx] != '\0' &&
+	   sscanf(&evtLabel[idx + 1], "%d", &cardidx) == 1 &&
+	   currentHalData->sndCardId == cardidx) {
+		if(wrap_json_unpack(eventJ, "{s:i s:o !}", "id", &numid, "val", &valuesJ)) {
+			AFB_API_ERROR(apiHandle, "Invalid Alsa Event label=%s value=%s", evtLabel, json_object_get_string(eventJ));
+			return;
+		}
+
+		currentHalAlsaCtlsT = currentHalData->internalHalData->alsaMapT;
+
+		// Search for corresponding numid in halCtls, if found, launch callback (if available)
+		for(idx = 0; idx < currentHalAlsaCtlsT->ctlsCount; idx++) {
+			if(currentHalAlsaCtlsT->ctls[idx].ctl.numid == numid) {
+				if(currentHalAlsaCtlsT->ctls[idx].action) {
+					source.uid = currentHalAlsaCtlsT->ctls[idx].action->uid;
+					source.api = currentHalAlsaCtlsT->ctls[idx].action->api;
+					source.request = NULL;
+
+					(void) ActionExecOne(&source, currentHalAlsaCtlsT->ctls[idx].action, valuesJ);
+				}
+				else {
+					AFB_API_NOTICE(apiHandle,
+						       "The alsa control id '%i' is corresponding to a known control but without any action registered",
+						       numid);
+				}
+
+				if((! currentHalAlsaCtlsT->ctls[idx].alsaControlEvent) ||
+				   InternalHalConvertJsonValues(apiHandle,
+								&currentHalAlsaCtlsT->ctls[idx].ctl.alsaCtlProperties,
+								valuesJ,
+								&normalizedValuesJ,
+								CONVERSION_ALSACORE_TO_NORMALIZED) ||
+				   (afb_event_push(currentHalAlsaCtlsT->ctls[idx].alsaControlEvent, normalizedValuesJ) < 0)) {
+					AFB_API_ERROR(apiHandle,
+						      "Couldn't generate an event for known halmap %s (alsa control id %i)",
+						      currentHalAlsaCtlsT->ctls[idx].uid,
+						      currentHalAlsaCtlsT->ctls[idx].ctl.numid);
+				}
+
+				return;
+			}
+		}
+
+		AFB_API_WARNING(apiHandle,
+				"Alsacore event with an unrecognized numid: %i, evtname=%s [msg=%s]",
+				numid,
+				evtLabel,
+				json_object_get_string(eventJ));
+
+		return;
+	}
+
+	AFB_API_INFO(apiHandle,
+		     "Not an alsacore event '%s' [msg=%s]",
+		     evtLabel,
+		     json_object_get_string(eventJ));
+
+	CtrlDispatchApiEvent(apiHandle, evtLabel, eventJ);
+}
+
+/*******************************************************************************
+ *	Internals HAL - 'halmixer' section parsing/handling functions	       *
+ ******************************************************************************/
+
+int InternalHalHalMixerConfig(afb_api_t apiHandle, CtlSectionT *section, json_object *MixerJ)
+{
+	int err = 0;
+
+	CtlConfigT *ctrlConfig;
+	struct HalData *currentHalData;
+
+	if(! apiHandle || ! section)
+		return -1;
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle)))
+		return -2;
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData)
+		return -3;
+
+	if(MixerJ) {
+		if(json_object_is_type(MixerJ, json_type_object))
+			currentHalData->internalHalData->halMixerJ = MixerJ;
+		else
+			return -4;
+
+		if(wrap_json_unpack(MixerJ, "{s:s}", "mixerapi", &currentHalData->internalHalData->mixerApiName))
+			return -5;
+
+		wrap_json_unpack(MixerJ, "{s?:s}", "prefix", &currentHalData->internalHalData->prefix);
+	}
+	else if(currentHalData->status == HAL_STATUS_AVAILABLE) {
+		err = InternalHalAttachToMixer(apiHandle);
+		if(err) {
+			AFB_API_ERROR(apiHandle, "Error %i while attaching to mixer", err);
+			return -6;
+		}
+	}
+
+	return 0;
+}
+
+/*******************************************************************************
+ *	Internals HAL - 'halmap' section parsing/handling functions	       *
+ ******************************************************************************/
+
+int InternalHalProcessOneHalMapObject(afb_api_t apiHandle, struct InternalHalAlsaMap *alsaMap, json_object *AlsaMapJ)
+{
+	char *action = NULL, *typename = NULL;
+
+	json_object *alsaJ = NULL, *createAlsaCtlJ = NULL;
+
+	AFB_API_DEBUG(apiHandle, "AlsaMapJ=%s", json_object_get_string(AlsaMapJ));
+
+	if(wrap_json_unpack(AlsaMapJ, "{s:s s?:s s:o s?:s !}",
+				      "uid", &alsaMap->uid,
+				      "info", &alsaMap->info,
+				      "alsa", &alsaJ,
+				      "action", &action)) {
+		AFB_API_ERROR(apiHandle, "Parsing error, map should only contains [label]|[uid]|[tag]|[info]|[alsa]|[action] in:\n-- %s", json_object_get_string(AlsaMapJ));
+		return -1;
+	}
+
+	if(wrap_json_unpack(alsaJ, "{s?:s s?:i s?:i s?:o !}",
+				   "name", &alsaMap->ctl.name,
+				   "numid", &alsaMap->ctl.numid,
+				   "value", &alsaMap->ctl.value,
+				   "create", &createAlsaCtlJ)) {
+		AFB_API_ERROR(apiHandle, "Parsing error, alsa json should only contains [name]|[numid]||[value]|[create] in:\n-- %s", json_object_get_string(alsaJ));
+		return -2;
+	}
+
+	if(createAlsaCtlJ) {
+		alsaMap->ctl.alsaCtlCreation = &alsaMap->ctl.alsaCtlProperties;
+
+		if(wrap_json_unpack(createAlsaCtlJ,
+				    "{s:s s:i s:i s:i s:i !}",
+				    "type", &typename,
+				    "count", &alsaMap->ctl.alsaCtlCreation->count,
+				    "minval", &alsaMap->ctl.alsaCtlCreation->minval,
+				    "maxval", &alsaMap->ctl.alsaCtlCreation->maxval,
+				    "step", &alsaMap->ctl.alsaCtlCreation->step)) {
+			AFB_API_ERROR(apiHandle, "Parsing error, alsa creation json should only contains [type]|[count]|[minval]|[maxval]|[step] in:\n-- %s", json_object_get_string(alsaJ));
+			return -3;
+		}
+
+		if(typename) {
+			alsaMap->ctl.alsaCtlCreation->type = InternalHalMapsAlsaTypeToEnum(typename);
+			if(alsaMap->ctl.alsaCtlCreation->type == SND_CTL_ELEM_TYPE_NONE) {
+				AFB_API_ERROR(apiHandle, "Couldn't get alsa type from string %s in:\n-- %s", typename, json_object_get_string(alsaJ));
+				return -4;
+			}
+		}
+
+		if(! alsaMap->ctl.name)
+			alsaMap->ctl.name = (char *) alsaMap->uid;
+	}
+	else if(alsaMap->ctl.name && alsaMap->ctl.numid > 0) {
+		AFB_API_ERROR(apiHandle,
+			      "Can't have both a control name (%s) and a control uid (%i) in alsa object:\n-- %s",
+			      alsaMap->ctl.name,
+			      alsaMap->ctl.numid,
+			      json_object_get_string(alsaJ));
+		return -5;
+	}
+	else if(! alsaMap->ctl.name && alsaMap->ctl.numid <= 0) {
+		AFB_API_ERROR(apiHandle,
+			      "Need at least a control name or a control uid in alsa object:\n-- %s",
+			      json_object_get_string(alsaJ));
+		return -6;
+	}
+
+	if(action)
+		alsaMap->actionJ = AlsaMapJ;
+
+	return 0;
+}
+
+int InternalHalHandleOneHalMapObject(afb_api_t apiHandle, char *cardId, struct InternalHalAlsaMap *alsaMap)
+{
+	int err;
+
+	json_object *valueJ, *convertedValueJ = NULL;
+
+	if(! (alsaMap->alsaControlEvent = afb_api_make_event(apiHandle, alsaMap->uid))) {
+		AFB_API_ERROR(apiHandle,
+			      "Didn't succeed to create event for current alsa control to load action using alsa object:\n-- %s",
+			      json_object_get_string(alsaMap->actionJ));
+		return -1;
+	}
+
+	if(alsaMap->ctl.alsaCtlCreation) {
+		if(InternalHalCreateAlsaCtl(apiHandle, cardId, &alsaMap->ctl)) {
+			AFB_API_ERROR(apiHandle, "An error happened when trying to create a new alsa control");
+			return -2;
+		}
+	}
+	else if(InternalHalUpdateAlsaCtlProperties(apiHandle, cardId, &alsaMap->ctl)) {
+		AFB_API_ERROR(apiHandle, "An error happened when trying to get existing alsa control info");
+		return -3;
+	}
+
+	if(alsaMap->ctl.value) {
+		// TBD JAI : handle alsa controls type
+		valueJ = json_object_new_int(alsaMap->ctl.value);
+		err = 0;
+
+		if(InternalHalConvertJsonValues(apiHandle, &alsaMap->ctl.alsaCtlProperties, valueJ, &convertedValueJ, CONVERSION_NORMALIZED_TO_ALSACORE)) {
+			AFB_API_ERROR(apiHandle, "Error when trying to convert initiate value json '%s'", json_object_get_string(valueJ));
+			err = -4;
+		}
+		else if(InternalHalSetAlsaCtlValue(apiHandle, cardId, alsaMap->ctl.numid, convertedValueJ)) {
+			AFB_API_ERROR(apiHandle,
+				      "Error while trying to set initial value on alsa control %i, device '%s', value '%s'",
+				      alsaMap->ctl.numid,
+				      cardId,
+				      json_object_get_string(valueJ));
+			err = -5;
+		}
+
+		json_object_put(valueJ);
+
+		if(convertedValueJ)
+			json_object_put(convertedValueJ);
+
+		if(err)
+			return err;
+	}
+
+	if(alsaMap->actionJ) {
+		alsaMap->action = calloc(1, sizeof(CtlActionT));
+		if(ActionLoadOne(apiHandle, alsaMap->action, alsaMap->actionJ, 0)) {
+			AFB_API_ERROR(apiHandle,
+				      "Didn't succeed to load action using alsa object:\n-- %s",
+				      json_object_get_string(alsaMap->actionJ));
+			return -6;
+		}
+	}
+
+	if(afb_api_add_verb(apiHandle, alsaMap->uid, alsaMap->info, InternalHalActionOnAlsaCtl, (void *) alsaMap, NULL, 0, 0)) {
+		AFB_API_ERROR(apiHandle,
+			      "Didn't succeed to create verb for current alsa control to load action using alsa object:\n-- %s",
+			      json_object_get_string(alsaMap->actionJ));
+		return -7;
+	}
+
+	return 0;
+}
+
+int InternalHalProcessAllHalMap(afb_api_t apiHandle, json_object *AlsaMapJ, struct InternalHalAlsaMapT *currentInternalHalAlsaMapT)
+{
+	int idx, err = 0;
+
+	struct InternalHalAlsaMap *ctlMaps;
+
+	json_type alsaMapType;
+
+	alsaMapType = json_object_get_type(AlsaMapJ);
+	switch(alsaMapType) {
+		case json_type_array:
+			currentInternalHalAlsaMapT->ctlsCount = (unsigned int) json_object_array_length(AlsaMapJ);
+			break;
+
+		case json_type_object:
+			currentInternalHalAlsaMapT->ctlsCount = 1;
+			break;
+
+		default:
+			currentInternalHalAlsaMapT->ctlsCount = 0;
+			currentInternalHalAlsaMapT->ctls = NULL;
+			AFB_API_WARNING(apiHandle, "Couldn't get content of 'halmap' section in : '%s'", json_object_get_string(AlsaMapJ));
+			return -1;
+	}
+
+	ctlMaps = calloc(currentInternalHalAlsaMapT->ctlsCount, sizeof(struct InternalHalAlsaMap));
+
+	for(idx = 0; idx < currentInternalHalAlsaMapT->ctlsCount; idx++)
+		err += InternalHalProcessOneHalMapObject(apiHandle, &ctlMaps[idx], alsaMapType == json_type_array ? json_object_array_get_idx(AlsaMapJ, idx) : AlsaMapJ);
+
+	currentInternalHalAlsaMapT->ctls = ctlMaps;
+
+	return err;
+}
+
+int InternalHalHandleAllHalMap(afb_api_t apiHandle, int sndCardId, struct InternalHalAlsaMapT *currentInternalHalAlsaMapT)
+{
+	int idx, err = 0;
+
+	char cardIdString[6];
+
+	snprintf(cardIdString, 6, "hw:%i", sndCardId);
+
+	InternalHalSubscribeToAlsaCardEvent(apiHandle, cardIdString);
+
+	for(idx = 0; idx < currentInternalHalAlsaMapT->ctlsCount; idx++)
+		err += InternalHalHandleOneHalMapObject(apiHandle, cardIdString, &currentInternalHalAlsaMapT->ctls[idx]);
+
+	return err;
+}
+
+int InternalHalHalMapConfig(afb_api_t apiHandle, CtlSectionT *section, json_object *AlsaMapJ)
+{
+	CtlConfigT *ctrlConfig;
+	struct HalData *currentHalData;
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle)))
+		return -1;
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData)
+		return -2;
+
+	if(AlsaMapJ) {
+		currentHalData->internalHalData->alsaMapT = calloc(1, sizeof(struct InternalHalAlsaMapT));
+
+		if(InternalHalProcessAllHalMap(apiHandle, AlsaMapJ, currentHalData->internalHalData->alsaMapT)) {
+			AFB_API_ERROR(apiHandle, "Failed to process 'halmap' section");
+			return -3;
+		}
+	}
+	else if(currentHalData->status == HAL_STATUS_UNAVAILABLE) {
+		AFB_API_WARNING(apiHandle, "Hal is unavailable, 'halmap' section data can't be handle");
+		return 1;
+	}
+	else if(currentHalData->sndCardId < 0) {
+		AFB_API_ERROR(apiHandle, "Hal alsa card id is not valid, 'halmap' section data can't be handle");
+		return -6;
+	}
+	else if(! currentHalData->internalHalData->alsaMapT) {
+		AFB_API_WARNING(apiHandle, "'halmap' section data is empty");
+		return 2;
+	}
+	else if(! (currentHalData->internalHalData->alsaMapT->ctlsCount > 0)) {
+		AFB_API_WARNING(apiHandle, "No alsa controls defined in 'halmap' section");
+		return 3;
+	}
+	else if(InternalHalHandleAllHalMap(apiHandle, currentHalData->sndCardId, currentHalData->internalHalData->alsaMapT)) {
+		AFB_API_ERROR(apiHandle, "Failed to handle 'halmap' section");
+		return -9;
+	}
+
+	return 0;
+}
+
+/*******************************************************************************
+ *		Internals HAL verbs functions				       *
+ ******************************************************************************/
+
+json_object *InternalHalGetJsonArrayForMixerDataTable(afb_api_t apiHandle,
+						      struct InternalHalMixerData **mixerDataList,
+						      enum MixerDataType dataType)
+{
+	json_object *mixerDataArrayJ, *currentMixerDataJ;
+
+	struct InternalHalMixerData *currentMixerData;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Api handle is not valid");
+		return NULL;
+	}
+
+	mixerDataArrayJ = json_object_new_array();
+	if(! mixerDataArrayJ) {
+		AFB_API_ERROR(apiHandle, "Can't generate json mixer data array");
+		return NULL;
+	}
+
+	currentMixerData = *mixerDataList;
+
+	while(currentMixerData) {
+		switch(dataType) {
+			case MIXER_DATA_STREAMS:
+				wrap_json_pack(&currentMixerDataJ,
+					       "{s:s s:s}",
+					       "name", currentMixerData->verb,
+					       "cardId", currentMixerData->streamCardId);
+				break;
+
+			case MIXER_DATA_PLAYBACKS:
+			case MIXER_DATA_CAPTURES :
+				wrap_json_pack(&currentMixerDataJ,
+					       "{s:s s:s}",
+					       "name", currentMixerData->verb,
+					       "mixer-name", currentMixerData->verbToCall,
+					       "uid", currentMixerData->streamCardId ? currentMixerData->streamCardId : "none");
+				break;
+
+			default:
+				json_object_put(mixerDataArrayJ);
+				return NULL;
+		}
+		json_object_array_add(mixerDataArrayJ, currentMixerDataJ);
+
+		currentMixerData = currentMixerData->next;
+	}
+
+	return mixerDataArrayJ;
+}
+
+json_object *InternalHalGetJsonArrayForControls(afb_api_t apiHandle, struct InternalHalAlsaMapT *currentAlsaMapDataT)
+{
+	unsigned int idx;
+
+	json_object *alsaMapDataArray, *currentAlsaMapData;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Can't get current internal hal api handle");
+		return NULL;
+	}
+
+	if(! currentAlsaMapDataT) {
+		AFB_API_ERROR(apiHandle, "Can't get Alsa map data table to handle");
+		return NULL;
+	}
+
+	if(! (alsaMapDataArray = json_object_new_array())) {
+		AFB_API_ERROR(apiHandle, "Can't generate json mixer data array");
+		return NULL;
+	}
+
+	for(idx = 0; idx < currentAlsaMapDataT->ctlsCount; idx++) {
+		wrap_json_pack(&currentAlsaMapData,
+			       "{s:s s:s}",
+			       "name", currentAlsaMapDataT->ctls[idx].uid,
+			       "info", currentAlsaMapDataT->ctls[idx].info ? currentAlsaMapDataT->ctls[idx].info : "none");
+
+		json_object_array_add(alsaMapDataArray, currentAlsaMapData);
+	}
+
+	return alsaMapDataArray;
+}
+
+void InternalHalInfo(afb_req_t request)
+{
+	char *apiToCall, *returnedError = NULL, *returnedInfo = NULL;
+
+	afb_api_t apiHandle;
+	CtlConfigT *ctrlConfig;
+
+	struct HalData *currentHalData;
+
+	json_object *requestJson, *toReturnJ = NULL, *requestAnswer, *streamsArray, *playbacksArray, *capturesArray, *controlsArray;
+
+	if(! (apiHandle = afb_req_get_api(request))) {
+		afb_req_fail(request, "api_handle", "Can't get current internal hal api handle");
+		return;
+	}
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle))) {
+		afb_req_fail(request, "hal_controller_config", "Can't get current internal hal controller config");
+		return;
+	}
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData) {
+		afb_req_fail(request, "hal_controller_data", "Can't get current internal hal controller data");
+		return;
+	}
+
+	if(! (requestJson = afb_req_json(request))) {
+		AFB_REQ_NOTICE(request, "Can't get request json");
+	}
+	else if(json_object_is_type(requestJson, json_type_object) && json_object_get_object(requestJson)->count > 0) {
+		apiToCall = currentHalData->internalHalData->mixerApiName;
+		if(! apiToCall) {
+			afb_req_fail(request, "mixer_api", "Can't get mixer api");
+			return;
+		}
+
+		if(InternalHalGetInfoFromMixer(apiHandle, apiToCall, requestJson, &toReturnJ, &returnedError, &returnedInfo)) {
+			afb_req_fail_f(request,
+				       "mixer_info",
+				       "Call to mixer info verb didn't succeed with status '%s' and info '%s'",
+				       returnedError ? returnedError : "not returned",
+				       returnedInfo ? returnedInfo : "not returned");
+			return;
+		}
+
+		afb_req_success(request, toReturnJ, "Mixer requested data");
+		return;
+	}
+
+	streamsArray = InternalHalGetJsonArrayForMixerDataTable(apiHandle,
+								&currentHalData->internalHalData->streamsData,
+								MIXER_DATA_STREAMS);
+	if(! streamsArray) {
+		afb_req_fail(request, "streams_data", "Didn't succeed to generate streams data array");
+		return;
+	}
+
+	playbacksArray = InternalHalGetJsonArrayForMixerDataTable(apiHandle,
+								  &currentHalData->internalHalData->playbacksData,
+								  MIXER_DATA_PLAYBACKS);
+	if(! playbacksArray) {
+		afb_req_fail(request, "playbacks_data", "Didn't succeed to generate playbacks data array");
+		return;
+	}
+
+	capturesArray = InternalHalGetJsonArrayForMixerDataTable(apiHandle,
+								 &currentHalData->internalHalData->capturesData,
+								 MIXER_DATA_CAPTURES);
+	if(! capturesArray) {
+		afb_req_fail(request, "captures_data", "Didn't succeed to generate captures data array");
+		return;
+	}
+
+	controlsArray = InternalHalGetJsonArrayForControls(apiHandle,
+							   currentHalData->internalHalData->alsaMapT);
+	if(! controlsArray) {
+		afb_req_fail(request, "controls_data", "Didn't succeed to generate controls data array");
+		return;
+	}
+
+	wrap_json_pack(&requestAnswer,
+		       "{s:o s:o s:o s:o}",
+		       "streams", streamsArray,
+		       "playbacks", playbacksArray,
+		       "captures", capturesArray,
+		       "controls", controlsArray);
+
+	afb_req_success(request, requestAnswer, "Requested data");
+}
+
+void InternalHalSubscribeUnsubscribe(afb_req_t request, enum SubscribeUnsubscribeType subscribeUnsubscribeType)
+{
+	int arrayIdx, searchIdx, count, subscriptionFound, subscriptionDoneNb = 0;
+
+	char *currentSubscriptionString;
+
+	afb_api_t apiHandle;
+	CtlConfigT *ctrlConfig;
+
+	struct HalData *currentHalData;
+	struct InternalHalMixerData *currentStreamData;
+	struct InternalHalAlsaMapT *InternalHalAlsaMapT;
+
+	json_object *requestJson, *requestedSubscriptionsJ, *requestedSubscriptionJ = NULL;
+	json_type requestJsonType;
+
+	if(! (apiHandle = afb_req_get_api(request))) {
+		afb_req_fail(request, "api_handle", "Can't get current internal hal api handle");
+		return;
+	}
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle))) {
+		afb_req_fail(request, "hal_controller_config", "Can't get current internal hal controller config");
+		return;
+	}
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData) {
+		afb_req_fail(request, "hal_controller_data", "Can't get current internal hal controller data");
+		return;
+	}
+
+	if(! currentHalData->internalHalData) {
+		afb_req_fail(request, "hal_controller_data", "Current internal hal data is not valid");
+		return;
+	}
+
+	InternalHalAlsaMapT = currentHalData->internalHalData->alsaMapT;
+
+	if(! (requestJson = afb_req_json(request))) {
+		afb_req_fail(request, "request_json", "Can't get request json");
+		return;
+	}
+
+	if(wrap_json_unpack(requestJson, "{s:o}", "events", &requestedSubscriptionsJ)) {
+		afb_req_fail(request, "request_json", "Request json invalid");
+		return;
+	}
+
+	requestJsonType = json_object_get_type(requestedSubscriptionsJ);
+	switch(requestJsonType) {
+		case json_type_string:
+			count = 1;
+			requestedSubscriptionJ = requestedSubscriptionsJ;
+			break;
+
+		case json_type_array:
+			count = (int) json_object_array_length(requestedSubscriptionsJ);
+			break;
+
+		default:
+			afb_req_fail(request, "request_json", "Request json invalid");
+			return;
+	}
+
+	for(arrayIdx = 0; arrayIdx < count; arrayIdx++) {
+		if(requestJsonType == json_type_array) {
+			requestedSubscriptionJ = json_object_array_get_idx(requestedSubscriptionsJ, arrayIdx);
+			if(! json_object_is_type(requestedSubscriptionJ, json_type_string)) {
+				afb_req_fail_f(request, "request_json", "Request json number %i in array invalid", arrayIdx);
+				return;
+			}
+		}
+
+		subscriptionFound = 0;
+		currentSubscriptionString = (char *) json_object_get_string(requestedSubscriptionJ);
+
+		if(! strcasecmp(currentSubscriptionString, HAL_STREAM_UPDATES_EVENT_NAME)) {
+			if(currentHalData->internalHalData->streamUpdates &&
+			   subscribeUnsubscribeType == SUBSCRIPTION &&
+			   afb_req_subscribe(request, currentHalData->internalHalData->streamUpdates)) {
+				afb_req_fail_f(request,
+					       "request_stream_list_updates_event",
+					       "Error while trying to subscribe to stream list updates event");
+					return;
+			}
+			else if(currentHalData->internalHalData->streamUpdates &&
+				subscribeUnsubscribeType == UNSUBSCRIPTION &&
+				afb_req_unsubscribe(request, currentHalData->internalHalData->streamUpdates)) {
+				afb_req_fail_f(request,
+					       "request_stream_list_updates_event",
+					       "Error while trying to unsubscribe to stream list updates event");
+					return;
+			}
+
+			subscriptionFound = 1;
+			subscriptionDoneNb++;
+		}
+
+		currentStreamData = currentHalData->internalHalData->streamsData;
+		while(currentStreamData &&
+		      (! subscriptionFound)) {
+			if(! strcasecmp(currentSubscriptionString, currentStreamData->verb)) {
+				if(currentStreamData->event &&
+				   subscribeUnsubscribeType == SUBSCRIPTION &&
+				   afb_req_subscribe(request, currentStreamData->event)) {
+					afb_req_fail_f(request,
+						       "request_stream_event",
+						       "Error while trying to subscribe to %s stream events",
+						       currentStreamData->verb);
+					return;
+				}
+				else if(currentStreamData->event &&
+					subscribeUnsubscribeType == UNSUBSCRIPTION &&
+					afb_req_unsubscribe(request, currentStreamData->event)) {
+					afb_req_fail_f(request,
+						       "request_stream_event",
+						       "Error while trying to unsubscribe to %s stream events",
+						       currentStreamData->verb);
+					return;
+				}
+
+				subscriptionFound = 1;
+				subscriptionDoneNb++;
+
+				break;
+			}
+
+			currentStreamData = currentStreamData->next;
+		}
+
+		searchIdx = 0;
+		while((searchIdx < (InternalHalAlsaMapT ? InternalHalAlsaMapT->ctlsCount : 0)) &&
+		      (! subscriptionFound)) {
+			if(! strcasecmp(currentSubscriptionString, InternalHalAlsaMapT->ctls[searchIdx].uid)) {
+				if(InternalHalAlsaMapT->ctls[searchIdx].alsaControlEvent &&
+				   subscribeUnsubscribeType == SUBSCRIPTION &&
+				   afb_req_subscribe(request, InternalHalAlsaMapT->ctls[searchIdx].alsaControlEvent)) {
+					afb_req_fail_f(request,
+						       "request_control_event",
+						       "Error while trying to subscribe to %s halmap controls events",
+						       InternalHalAlsaMapT->ctls[searchIdx].uid);
+					return;
+				}
+				else if(InternalHalAlsaMapT->ctls[searchIdx].alsaControlEvent &&
+					subscribeUnsubscribeType == UNSUBSCRIPTION &&
+					afb_req_unsubscribe(request, InternalHalAlsaMapT->ctls[searchIdx].alsaControlEvent)) {
+					afb_req_fail_f(request,
+						       "request_stream_event",
+						       "Error while trying to unsubscribe to %s halmap controls events",
+						       InternalHalAlsaMapT->ctls[searchIdx].uid);
+					return;
+				}
+
+				subscriptionFound = 1;
+				subscriptionDoneNb++;
+
+				break;
+			}
+
+			searchIdx++;
+		}
+	}
+
+	if(subscriptionDoneNb == 0)
+		afb_req_fail_f(request,
+			       "events_not_found",
+			       "%s failed, event(s) were not found",
+			       subscribeUnsubscribeType == SUBSCRIPTION ? "Subscription" : "Unsubscription");
+	if(subscriptionDoneNb == count)
+		afb_req_success_f(request,
+				  json_object_new_int(subscriptionDoneNb),
+				  "%s succeed for all the %i events requested",
+				  subscribeUnsubscribeType == SUBSCRIPTION ? "Subscription" : "Unsubscription",
+				  subscriptionDoneNb);
+	else if(subscriptionDoneNb < count)
+		afb_req_success_f(request,
+				  json_object_new_int(subscriptionDoneNb),
+				  "%s succeed but only to %i events requested out of %i",
+				  subscribeUnsubscribeType == SUBSCRIPTION ? "Subscription" : "Unsubscription",
+				  subscriptionDoneNb,
+				  count);
+	else
+		afb_req_success_f(request,
+				  json_object_new_int(subscriptionDoneNb),
+				  "%s succeed but to more events than requested (%i out of %i)",
+				  subscribeUnsubscribeType == SUBSCRIPTION ? "Subscription" : "Unsubscription",
+				  subscriptionDoneNb,
+				  count);
+}
+
+void InternalHalSubscribe(afb_req_t request)
+{
+	InternalHalSubscribeUnsubscribe(request, SUBSCRIPTION);
+}
+
+void InternalHalUnsubscribe(afb_req_t request)
+{
+	InternalHalSubscribeUnsubscribe(request, UNSUBSCRIPTION);
+}
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-cb.h b/4a-hal/4a-internals-hal/4a-internals-hal-cb.h
new file mode 100644
index 0000000..ff35656
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-cb.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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.
+ */
+
+#ifndef _INTERNALS_HAL_CB_INCLUDE_
+#define _INTERNALS_HAL_CB_INCLUDE_
+
+#include <stdio.h>
+
+#include <afb/afb-binding.h>
+
+#include <ctl-config.h>
+
+// Enum for the type of subscription/subscription
+enum SubscribeUnsubscribeType {
+	SUBSCRIPTION = 1,
+	UNSUBSCRIPTION = 2
+};
+
+// Internals HAL event handler function
+void InternalHalDispatchApiEvent(afb_api_t apiHandle, const char *evtLabel, json_object *eventJ);
+
+// Internals HAL sections parsing functions
+int InternalHalHalMixerConfig(afb_api_t apiHandle, CtlSectionT *section, json_object *MixerJ);
+int InternalHalHalMapConfig(afb_api_t apiHandle, CtlSectionT *section, json_object *AlsaMapJ);
+
+// Internals HAL verbs functions
+void InternalHalInfo(afb_req_t request);
+void InternalHalSubscribe(afb_req_t request);
+void InternalHalUnsubscribe(afb_req_t request);
+
+#endif /* _HALMGR_CB_INCLUDE_ */
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.c b/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.c
new file mode 100644
index 0000000..95e9099
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.c
@@ -0,0 +1,389 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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
+
+#include <stdio.h>
+#include <string.h>
+
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include "4a-hal-utilities-data.h"
+
+#include "4a-hal-utilities-hal-streams-handler.h"
+#include "4a-hal-utilities-verbs-loader.h"
+
+#include "../4a-hal-manager/4a-hal-manager.h"
+
+#include "4a-internals-hal-mixer-link.h"
+#include "4a-internals-hal-cb.h"
+
+/*******************************************************************************
+ *		Internals HAL handle mixer calls functions		       *
+ ******************************************************************************/
+
+int InternalHalHandleMixerData(afb_api_t apiHandle,
+			       struct InternalHalMixerData **mixerDataList,
+			       json_object *currentDataJ,
+			       enum MixerDataType dataType)
+{
+	int idx, mixerDataNb, verbStart, size;
+	int err = (int) MIXER_NO_ERROR;
+
+	char *currentDataVerbName, *currentStreamCardId;
+
+	json_type currentDataType;
+	json_object *currentJ;
+
+	struct InternalHalMixerData *currentMixerData;
+
+	currentDataType = json_object_get_type(currentDataJ);
+	switch(currentDataType) {
+		case json_type_object:
+			mixerDataNb = 1;
+			break;
+		case json_type_array:
+			mixerDataNb = (unsigned int) json_object_array_length(currentDataJ);
+			break;
+		default:
+			mixerDataNb = 0;
+			AFB_API_ERROR(apiHandle, "No data returned");
+			return (int) MIXER_ERROR_DATA_EMPTY;
+	}
+
+	for(idx = 0; idx < mixerDataNb; idx++) {
+		if(currentDataType == json_type_array)
+			currentJ = json_object_array_get_idx(currentDataJ, (int) idx);
+		else
+			currentJ = currentDataJ;
+
+		if(wrap_json_unpack(currentJ, "{s:s}", "verb", &currentDataVerbName)) {
+			AFB_API_ERROR(apiHandle, "Can't find verb in current data object");
+			err += (int) MIXER_ERROR_DATA_NAME_UNAVAILABLE;
+		}
+		else if(dataType == MIXER_DATA_STREAMS && wrap_json_unpack(currentJ, "{s:s}", "alsa", &currentStreamCardId)) {
+			AFB_API_ERROR(apiHandle, "Can't find card id in current data object");
+			err += (int) MIXER_ERROR_DATA_CARDID_UNAVAILABLE;
+		}
+		else {
+			switch(dataType) {
+				case MIXER_DATA_STREAMS:
+					size = (int) strlen(currentDataVerbName);
+					for(verbStart = 0; verbStart < size; verbStart++) {
+						if(currentDataVerbName[verbStart] == '#') {
+							verbStart++;
+							break;
+						}
+					}
+
+					if(verbStart == size)
+						verbStart = 0;
+
+					if(! HalUtlAddStreamDataAndCreateStreamVerb(apiHandle,
+										    &currentDataVerbName[verbStart],
+										    currentDataVerbName,
+										    currentStreamCardId)) {
+						AFB_API_ERROR(apiHandle,
+							      "Error while adding stream '%s'",
+							      currentDataVerbName);
+						err += (int) MIXER_ERROR_STREAM_NOT_ADDED;
+					}
+
+					break;
+
+				case MIXER_DATA_PLAYBACKS:
+				case MIXER_DATA_CAPTURES:
+					currentMixerData = HalUtlAddMixerDataToMixerDataList(mixerDataList);
+
+					currentMixerData->verb = strdup((dataType == MIXER_DATA_PLAYBACKS) ? HAL_PLAYBACK_ID : HAL_CAPTURE_ID);
+					currentMixerData->verbToCall = strdup(currentDataVerbName);
+
+					if((! currentMixerData->verb) ||
+					   (! currentMixerData->verbToCall)) {
+						HalUtlRemoveSelectedMixerData(mixerDataList, currentMixerData);
+						err += (int) MIXER_ERROR_STREAM_ALLOCATION_FAILED;
+					}
+					break;
+
+				default:
+					break;
+			}
+		}
+	}
+
+	if(dataType == MIXER_DATA_PLAYBACKS) {
+		if(afb_api_add_verb(apiHandle,
+				    HAL_PLAYBACK_ID,
+				    "Playback action transferred to mixer",
+				    HalUtlActionOnPlayback,
+				    (void *) *mixerDataList,
+				    NULL,
+				    0,
+				    0)) {
+			AFB_API_ERROR(apiHandle, "Error while creating verb for playbacks : '%s'", HAL_PLAYBACK_ID);
+			err += (int) MIXER_ERROR_PLAYBACK_VERB_NOT_CREATED;
+		}
+	}
+
+	if(dataType == MIXER_DATA_CAPTURES) {
+		if(afb_api_add_verb(apiHandle,
+				    HAL_CAPTURE_ID,
+				    "Capture action transferred to mixer",
+				    HalUtlActionOnCapture,
+				    (void *) *mixerDataList,
+				    NULL,
+				    0,
+				    0)) {
+			AFB_API_ERROR(apiHandle, "Error while creating verb for captures : '%s'", HAL_CAPTURE_ID);
+			err += (int) MIXER_ERROR_CAPTURE_VERB_NOT_CREATED;
+		}
+	}
+
+	return err;
+}
+
+int InternalHalHandleMixerAttachResponse(afb_api_t apiHandle, struct InternalHalData *currentHalSpecificData, json_object *mixerResponseJ)
+{
+	int err = (int) MIXER_NO_ERROR;
+
+	json_object *mixerStreamsJ = NULL, *mixerPlaybacksJ = NULL, *mixerCapturesJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Can't get current hal api handle");
+		return (int) MIXER_ERROR_API_UNAVAILABLE;
+	}
+
+	if(wrap_json_unpack(mixerResponseJ, "{s?:o s?:o s?:o}", "streams", &mixerStreamsJ, "playbacks", &mixerPlaybacksJ, "captures", &mixerCapturesJ)) {
+		AFB_API_ERROR(apiHandle, "Can't get streams|playbacks|captures object in '%s'", json_object_get_string(mixerResponseJ));
+		return (int) MIXER_ERROR_DATA_UNAVAILABLE;
+	}
+
+	if(mixerStreamsJ) {
+		err += InternalHalHandleMixerData(apiHandle, &currentHalSpecificData->streamsData, mixerStreamsJ, MIXER_DATA_STREAMS);
+		if(err)
+			AFB_API_ERROR(apiHandle, "Error during handling response mixer streams data '%s'", json_object_get_string(mixerStreamsJ));
+	}
+
+	if(mixerPlaybacksJ) {
+		err += InternalHalHandleMixerData(apiHandle, &currentHalSpecificData->playbacksData, mixerPlaybacksJ, MIXER_DATA_PLAYBACKS);
+		if(err)
+			AFB_API_ERROR(apiHandle, "Error during handling response mixer playbacks data '%s'", json_object_get_string(mixerPlaybacksJ));
+	}
+
+	if(mixerCapturesJ) {
+		err += InternalHalHandleMixerData(apiHandle, &currentHalSpecificData->capturesData, mixerCapturesJ, MIXER_DATA_CAPTURES);
+		if(err)
+			AFB_API_ERROR(apiHandle, "Error during handling response mixer captures data '%s'", json_object_get_string(mixerCapturesJ));
+	}
+
+	if(! currentHalSpecificData->streamsData) {
+		AFB_API_WARNING(apiHandle, "No stream detected in mixer response, %s verb won't be created", HAL_ALL_STREAMS_VERB);
+	}
+	else if(afb_api_add_verb(apiHandle,
+				 HAL_ALL_STREAMS_VERB,
+				 "Send a stream action on all streams",
+				 HalUtlActionOnAllStream,
+				 (void *) currentHalSpecificData->streamsData,
+				 NULL,
+				 0,
+				 0)) {
+		AFB_API_ERROR(apiHandle, "Error while creating verb for all streams : '%s'", HAL_ALL_STREAMS_VERB);
+		return (int) MIXER_ERROR_ALL_STREAMS_VERB_NOT_CREATED;
+	}
+
+	return err;
+}
+
+int InternalHalAttachToMixer(afb_api_t apiHandle)
+{
+	int err = 0, mixerError;
+
+	char *apiToCall, *returnedError = NULL, *returnedInfo = NULL;
+
+	CtlConfigT *ctrlConfig;
+
+	struct HalData *currentHalData, *concurentHalData = NULL;
+
+	json_object *responseJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Can't get current internal hal api handle");
+		return -1;
+	}
+
+	if(! (ctrlConfig = (CtlConfigT *) afb_api_get_userdata(apiHandle))) {
+		AFB_API_ERROR(apiHandle, "Can't get current hal controller config");
+		return -2;
+	}
+
+	currentHalData = (struct HalData *) getExternalData(ctrlConfig);
+	if(! currentHalData) {
+		AFB_API_ERROR(apiHandle, "Can't get current hal controller data");
+		return -3;
+	}
+
+	switch(currentHalData->status) {
+		case HAL_STATUS_UNAVAILABLE:
+			AFB_API_ERROR(apiHandle, "Seems that the hal corresponding card was not found by alsacore at startup");
+			return -4;
+
+		case HAL_STATUS_READY:
+			AFB_API_NOTICE(apiHandle, "Seems that the hal mixer is already initialized");
+			return 1;
+
+		case HAL_STATUS_AVAILABLE:
+			break;
+	}
+
+	concurentHalData = HalUtlSearchReadyHalDataByCardId(HalMngGetHalDataList(), currentHalData->sndCardId);
+	if(concurentHalData) {
+		AFB_API_ERROR(apiHandle,
+			      "Trying to attach mixer for hal '%s' but the alsa device %i is already in use with mixer by hal '%s'",
+			      currentHalData->apiName,
+			      currentHalData->sndCardId,
+			      concurentHalData->apiName);
+		return -5;
+	}
+
+	apiToCall = currentHalData->internalHalData->mixerApiName;
+	if(! apiToCall) {
+		AFB_API_ERROR(apiHandle, "Can't get mixer api");
+		return -6;
+	}
+
+	if(afb_api_call_sync(apiHandle,
+			     apiToCall,
+			     MIXER_ATTACH_VERB,
+			     json_object_get(currentHalData->internalHalData->halMixerJ),
+			     &responseJ,
+			     &returnedError,
+			     &returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      MIXER_ATTACH_VERB,
+			      apiToCall,
+			      returnedError ? returnedError : "not returned",
+			      returnedInfo ? returnedInfo : "not returned");
+		err = -7;
+	}
+	else if(! responseJ) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but no response was returned",
+			      MIXER_ATTACH_VERB,
+			      apiToCall);
+		err = -8;
+	}
+	else {
+		mixerError = InternalHalHandleMixerAttachResponse(apiHandle, currentHalData->internalHalData, responseJ);
+		if(mixerError != (int) MIXER_NO_ERROR) {
+			AFB_API_ERROR(apiHandle,
+				      "Seems that %s call to api %s succeed but this warning was risen by response decoder : %i '%s'",
+				      MIXER_ATTACH_VERB,
+				      apiToCall,
+				      mixerError,
+				      json_object_get_string(responseJ));
+			err = -9;
+		}
+		else {
+			AFB_API_NOTICE(apiHandle,
+				       "Seems that %s call to api %s succeed with no warning raised : '%s'",
+				       MIXER_ATTACH_VERB,
+				       apiToCall,
+				       json_object_get_string(responseJ));
+			currentHalData->status = HAL_STATUS_READY;
+		}
+	}
+
+	if(responseJ)
+		json_object_put(responseJ);
+
+	free(returnedError);
+	free(returnedInfo);
+
+	return err;
+}
+
+int InternalHalGetInfoFromMixer(afb_api_t apiHandle,
+				char *apiToCall,
+				json_object *requestJson,
+				json_object **toReturnJ,
+				char **returnedError,
+				char **returnedInfo)
+{
+	json_object *responseJ = NULL;
+
+	if(! apiHandle) {
+		AFB_API_ERROR(apiHandle, "Can't get current hal api handle");
+		return -1;
+	}
+
+	if(! apiToCall) {
+		AFB_API_ERROR(apiHandle, "Can't get mixer api");
+		return -2;
+	}
+
+	if(! requestJson) {
+		AFB_API_ERROR(apiHandle, "Can't get request json");
+		return -3;
+	}
+
+	if(*returnedError || *returnedInfo) {
+		AFB_API_ERROR(apiHandle, "'returnedError' and 'returnedInfo' strings should be empty and set to 'NULL'");
+		return -4;
+	}
+
+	if(*toReturnJ) {
+		AFB_API_ERROR(apiHandle, "'toReturnJ' should be empty and set to 'NULL'");
+		return -5;
+	}
+
+	if(afb_api_call_sync(apiHandle,
+			     apiToCall,
+			     MIXER_INFO_VERB,
+			     json_object_get(requestJson),
+			     &responseJ,
+			     returnedError,
+			     returnedInfo)) {
+		AFB_API_ERROR(apiHandle,
+			      "Something went wrong during call to verb '%s' of api '%s' with error '%s' and info '%s'",
+			      apiToCall,
+			      MIXER_INFO_VERB,
+			      *returnedError ? *returnedError : "not returned",
+			      *returnedInfo ? *returnedInfo : "not returned");
+		return -6;
+	}
+	else if(! responseJ) {
+		AFB_API_ERROR(apiHandle,
+			      "Seems that %s call to api %s succeed but no response was returned",
+			      MIXER_INFO_VERB,
+			      apiToCall);
+		json_object_put(responseJ);
+		return -7;
+	}
+	else {
+		AFB_API_NOTICE(apiHandle,
+			       "Seems that %s call to api %s succeed with no warning raised : '%s'",
+			       MIXER_INFO_VERB,
+			       apiToCall,
+			       json_object_get_string(responseJ));
+		*toReturnJ = responseJ;
+	}
+
+	return 0;
+}
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.h b/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.h
new file mode 100644
index 0000000..6c1f827
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-mixer-link.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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.
+ */
+
+#ifndef _INTERNALS_HAL_SOFTMIXER_LINK_INCLUDE_
+#define _INTERNALS_HAL_SOFTMIXER_LINK_INCLUDE_
+
+#include <stdio.h>
+
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include <afb-helpers-utils.h>
+
+#include "4a-hal-utilities-data.h"
+
+#define MIXER_ATTACH_VERB	"attach"
+#define MIXER_INFO_VERB		"info"
+
+#define HAL_PLAYBACK_ID		"playback"
+#define HAL_CAPTURE_ID		"capture"
+
+#define HAL_ALL_STREAMS_VERB	"all-streams"
+
+// Enum for the type of object sent back by the mixer
+enum MixerDataType {
+	MIXER_DATA_STREAMS = 1,
+	MIXER_DATA_PLAYBACKS = 2,
+	MIXER_DATA_CAPTURES = 3
+};
+
+// Enum for the type of error detected
+enum MixerStatus {
+	MIXER_NO_ERROR=0,
+	MIXER_ERROR_API_UNAVAILABLE=-1,
+	MIXER_ERROR_DATA_UNAVAILABLE=-2,
+	MIXER_ERROR_DATA_EMPTY =-3,
+	MIXER_ERROR_PLAYBACK_VERB_NOT_CREATED =-4,
+	MIXER_ERROR_CAPTURE_VERB_NOT_CREATED =-5,
+	MIXER_ERROR_ALL_STREAMS_VERB_NOT_CREATED =-6,
+	MIXER_ERROR_DATA_NAME_UNAVAILABLE=-10,
+	MIXER_ERROR_DATA_CARDID_UNAVAILABLE=-100,
+	MIXER_ERROR_STREAM_NOT_ADDED =-1000,
+	MIXER_ERROR_STREAM_ALLOCATION_FAILED =-10000
+};
+
+// Internals HAL handle mixer calls functions
+int InternalHalAttachToMixer(afb_api_t apiHandle);
+int InternalHalGetInfoFromMixer(afb_api_t apiHandle,
+				char *apiToCall,
+				json_object *requestJson,
+				json_object **toReturnJ,
+				char **returnedError,
+				char **returnedInfo);
+
+#endif /* _INTERNALS_HAL_SOFTMIXER_LINK_INCLUDE_ */
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.c b/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.c
new file mode 100644
index 0000000..64083a9
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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
+
+#include <stdio.h>
+#include <string.h>
+
+#include <limits.h>
+#include <math.h>
+
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include "4a-internals-hal-value-handler.h"
+#include "4a-internals-hal-alsacore-link.h"
+
+/*******************************************************************************
+ *		Simple conversion value to/from percentage functions	       *
+ ******************************************************************************/
+
+int InternalHalConvertValueToPercentage(double val, double min, double max)
+{
+	double range;
+
+	range = max - min;
+	if(range <= 0)
+		return -INT_MAX;
+
+	val -= min;
+
+	return (int) round(val / range * 100);
+}
+
+int InternalHalConvertPercentageToValue(int percentage, int min, int max)
+{
+	int range;
+
+	range = max - min;
+	if(range <= 0)
+		return -INT_MAX;
+
+	return (int) round((double) percentage * (double) range * 0.01 + (double) min);
+}
+
+/*******************************************************************************
+ *		Convert json object from percentage to value	 	       *
+ ******************************************************************************/
+
+int InternalHalConvertJsonValueForIntegerControl(afb_api_t apiHandle,
+						 struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+						 json_object *toConvertJ,
+						 json_object **ConvertedJ,
+						 enum ConversionType requestedConversion)
+{
+	int initialValue, convertedValue;
+
+	if(! json_object_is_type(toConvertJ, json_type_int)) {
+		AFB_API_ERROR(apiHandle,
+			      "Can't convert json value, unrecognized json format (must be an integer) : '%s'",
+			      json_object_get_string(toConvertJ));
+		return -1;
+	}
+
+	initialValue = json_object_get_int(toConvertJ);
+
+	switch(requestedConversion) {
+		case CONVERSION_NORMALIZED_TO_ALSACORE:
+			if(initialValue < 0 || initialValue > 100) {
+				AFB_API_ERROR(apiHandle,
+					      "Cannot convert '%i' value, value should be between 0 and 100 ('%s')",
+					      initialValue,
+					      json_object_get_string(toConvertJ));
+				return -2;
+			}
+
+			convertedValue = InternalHalConvertPercentageToValue(initialValue,
+									     alsaCtlProperties->minval,
+									     alsaCtlProperties->maxval);
+			if(convertedValue == -INT_MAX) {
+				AFB_API_ERROR(apiHandle,
+					      "Didn't succeed to convert %i (using min %i et max %i)",
+					      initialValue,
+					      alsaCtlProperties->minval,
+					      alsaCtlProperties->maxval);
+				return -3;
+			}
+
+			if(alsaCtlProperties->step) {
+				// Round value to the nearest step
+				convertedValue = (int) round((double) convertedValue / (double) alsaCtlProperties->step);
+				convertedValue *= alsaCtlProperties->step;
+			}
+			break;
+
+		case CONVERSION_ALSACORE_TO_NORMALIZED:
+			convertedValue = InternalHalConvertValueToPercentage(initialValue,
+									     alsaCtlProperties->minval,
+									     alsaCtlProperties->maxval);
+			if(convertedValue == -INT_MAX) {
+				AFB_API_ERROR(apiHandle,
+					      "Didn't succeed to convert %i (using min %i et max %i)",
+					      initialValue,
+					      alsaCtlProperties->minval,
+					      alsaCtlProperties->maxval);
+				return -4;
+			}
+
+			break;
+
+		default:
+			AFB_API_ERROR(apiHandle,
+				      "Can't convert '%i' value, unrecognized conversion type : '%i'",
+				      initialValue,
+				      (int) requestedConversion);
+			*ConvertedJ = NULL;
+			return -5;
+	}
+
+	*ConvertedJ = json_object_new_int(convertedValue);
+
+	return 0;
+}
+
+int InternalHalConvertJsonValueForBooleanControl(afb_api_t apiHandle,
+						 struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+						 json_object *toConvertJ,
+						 json_object **ConvertedJ,
+						 enum ConversionType requestedConversion)
+{
+	int initialValue;
+
+	switch(json_object_get_type(toConvertJ)) {
+		case json_type_int:
+			initialValue = json_object_get_int(toConvertJ);
+			break;
+
+		case json_type_boolean:
+			initialValue = json_object_get_boolean(toConvertJ);
+			break;
+
+		default:
+			AFB_API_ERROR(apiHandle,
+				      "Can't convert json value, unrecognized format (must be an integer or a boolean) : '%s'",
+				      json_object_get_string(toConvertJ));
+			return -1;
+	}
+
+	if(initialValue < 0 || initialValue > 1) {
+		AFB_API_ERROR(apiHandle,
+			      "Cannot convert '%i' value, value should be 0 or 1 ('%s')",
+			      initialValue,
+			      json_object_get_string(toConvertJ));
+		return -2;
+	}
+
+	switch(requestedConversion) {
+		case CONVERSION_NORMALIZED_TO_ALSACORE:
+			*ConvertedJ = json_object_new_int(initialValue);
+			break;
+
+		case CONVERSION_ALSACORE_TO_NORMALIZED:
+			*ConvertedJ = json_object_new_boolean(initialValue);
+			break;
+
+		default:
+			AFB_API_ERROR(apiHandle,
+				      "Can't convert '%i' value, unrecognized conversion type : '%i'",
+				      initialValue,
+				      (int) requestedConversion);
+			*ConvertedJ = NULL;
+			return -3;
+	}
+
+	return 0;
+}
+
+int InternalHalConvertJsonValues(afb_api_t apiHandle,
+				 struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+				 json_object *toConvertJ,
+				 json_object **ConvertedJ,
+				 enum ConversionType requestedConversion)
+{
+	int conversionError = 0, idx, count;
+
+	json_type toConvertType;
+	json_object *toConvertObjectJ, *convertedValueJ, *convertedArrayJ;
+
+	*ConvertedJ = NULL;
+
+	toConvertType = json_object_get_type(toConvertJ);
+	count = (toConvertType == json_type_array) ? (int) json_object_array_length(toConvertJ) : 1;
+
+	convertedArrayJ = json_object_new_array();
+
+	for(idx = 0; idx < count; idx++) {
+		if(toConvertType == json_type_array)
+			toConvertObjectJ = json_object_array_get_idx(toConvertJ, idx);
+		else
+			toConvertObjectJ = toConvertJ;
+
+		switch(alsaCtlProperties->type) {
+			case SND_CTL_ELEM_TYPE_INTEGER:
+			case SND_CTL_ELEM_TYPE_INTEGER64:
+				conversionError = InternalHalConvertJsonValueForIntegerControl(apiHandle,
+											       alsaCtlProperties,
+											       toConvertObjectJ,
+											       &convertedValueJ,
+											       requestedConversion);
+				if(conversionError) {
+					AFB_API_ERROR(apiHandle,
+						      "Error %i happened in when trying to convert index %i for integer control ('%s')",
+						      conversionError,
+						      idx,
+						      json_object_get_string(toConvertObjectJ));
+					json_object_put(convertedArrayJ);
+					return -(idx + 1);
+				}
+				break;
+
+			case SND_CTL_ELEM_TYPE_BOOLEAN:
+				conversionError = InternalHalConvertJsonValueForBooleanControl(apiHandle,
+											       alsaCtlProperties,
+											       toConvertObjectJ,
+											       &convertedValueJ,
+											       requestedConversion);
+				if(conversionError) {
+					AFB_API_ERROR(apiHandle,
+						      "Error %i happened in when trying to convert index %i for boolean control ('%s')",
+						      conversionError,
+						      idx,
+						      json_object_get_string(toConvertObjectJ));
+					json_object_put(convertedArrayJ);
+					return -(idx + 1);
+				}
+				break;
+
+			default:
+				AFB_API_ERROR(apiHandle,
+					      "Conversion not handle for the alsa control type %i",
+					      (int) alsaCtlProperties->type);
+				json_object_put(convertedArrayJ);
+				return -(idx + 1);
+		}
+
+		json_object_array_put_idx(convertedArrayJ, idx, convertedValueJ);
+	}
+
+	*ConvertedJ = convertedArrayJ;
+
+	return 0;
+}
+
+int InternalHalChangePreviousValuesUsingJson(afb_api_t apiHandle,
+					     struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+					     json_object *requestedPercentageVariationJ,
+					     json_object *previousControlValuesJ,
+					     json_object **ChangedJ)
+{
+	int requestedPercentageVariation, requestedVariation, toChangeValue, changedValue, idx, count;
+
+	char *requestedPercentageVariationString, *conversionEnd;
+
+	json_object *toChangeObjectJ, *changedArrayJ;
+
+	*ChangedJ = NULL;
+
+	requestedPercentageVariationString = (char *) json_object_get_string(requestedPercentageVariationJ);
+
+	requestedPercentageVariation = (int) strtol(requestedPercentageVariationString, &conversionEnd, 10);
+	if(conversionEnd == requestedPercentageVariationString) {
+		AFB_API_ERROR(apiHandle,
+			      "Tried to increase/decrease an integer control \
+			      but string sent in json is not a increase/decrease string : '%s'",
+			      json_object_get_string(requestedPercentageVariationJ));
+		return -1;
+	}
+
+	if(alsaCtlProperties->type != SND_CTL_ELEM_TYPE_INTEGER &&
+	   alsaCtlProperties->type != SND_CTL_ELEM_TYPE_INTEGER64) {
+		AFB_API_ERROR(apiHandle,
+			      "Tried to increase/decrease values on a incompatible \
+			      control type (%i), control type must be an integer",
+			      alsaCtlProperties->type);
+		return -2;
+	}
+
+	if(requestedPercentageVariation < -100 || requestedPercentageVariation > 100) {
+		AFB_API_ERROR(apiHandle,
+			      "Tried to increase/decrease values but specified change is \
+			      not a valid percentage, it should be between -100 and 100");
+		return -3;
+	}
+
+	requestedVariation = InternalHalConvertPercentageToValue((int) abs(requestedPercentageVariation),
+								 alsaCtlProperties->minval,
+								 alsaCtlProperties->maxval);
+	if(requestedVariation == -INT_MAX) {
+		AFB_API_ERROR(apiHandle,
+			      "Didn't succeed to convert %i (using min %i et max %i)",
+			      requestedPercentageVariation,
+			      alsaCtlProperties->minval,
+			      alsaCtlProperties->maxval);
+		return -4;
+	}
+
+	if(requestedPercentageVariation < 0)
+		requestedVariation = -requestedVariation;
+
+	count = (int) json_object_array_length(previousControlValuesJ);
+
+	changedArrayJ = json_object_new_array();
+
+	for(idx = 0; idx < count; idx++) {
+		toChangeObjectJ = json_object_array_get_idx(previousControlValuesJ, idx);
+
+		if(! json_object_is_type(toChangeObjectJ, json_type_int)) {
+			AFB_API_ERROR(apiHandle,
+				      "Current json object %s is not an integer",
+				      json_object_get_string(toChangeObjectJ));
+			return -(10 + idx);
+		}
+
+		toChangeValue = json_object_get_int(toChangeObjectJ);
+
+		if((toChangeValue + requestedVariation) < alsaCtlProperties->minval)
+			changedValue = alsaCtlProperties->minval;
+		else if((toChangeValue + requestedVariation) > alsaCtlProperties->maxval)
+			changedValue = alsaCtlProperties->maxval;
+		else
+			changedValue = toChangeValue + requestedVariation;
+
+		json_object_array_put_idx(changedArrayJ, idx, json_object_new_int(changedValue));
+	}
+
+	*ChangedJ = changedArrayJ;
+
+	return 0;
+}
\ No newline at end of file
diff --git a/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.h b/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.h
new file mode 100644
index 0000000..f0288ac
--- /dev/null
+++ b/4a-hal/4a-internals-hal/4a-internals-hal-value-handler.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@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.
+ */
+
+#ifndef _INTERNALS_HAL_VALUE_CONVERSION_INCLUDE_
+#define _INTERNALS_HAL_VALUE_CONVERSION_INCLUDE_
+
+#include <stdio.h>
+
+#include <wrap-json.h>
+
+#include <afb/afb-binding.h>
+
+#include "4a-internals-hal-alsacore-link.h"
+
+// Enum for the type of conversion requested
+enum ConversionType {
+	CONVERSION_NORMALIZED_TO_ALSACORE = 1,
+	CONVERSION_ALSACORE_TO_NORMALIZED = 2
+};
+
+// Simple conversion value to/from percentage functions
+int InternalHalConvertValueToPercentage(double val, double min, double max);
+int InternalHalConvertPercentageToValue(int percentage, int min, int max);
+
+// Convert json object from percentage to value
+int InternalHalConvertJsonValues(afb_api_t apiHandle,
+				 struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+				 json_object *toConvertJ,
+				 json_object **ConvertedJ,
+				 enum ConversionType requestedConversion);
+
+// Increase/Decrease previous values using percentage passed in Json
+int InternalHalChangePreviousValuesUsingJson(afb_api_t apiHandle,
+					     struct InternalHalAlsaCtlProperties *alsaCtlProperties,
+					     json_object *requestedPercentageVariationJ,
+					     json_object *previousControlValuesJ,
+					     json_object **ChangedJ);
+
+#endif /* _INTERNALS_HAL_VALUE_CONVERSION_INCLUDE_ */
\ No newline at end of file