Handle hal status using card presence and mixer init

Test audio card presence at hal startup using alsacore call.
Handling a new state of hal.
Move alsacore link files into 4a-hal-controllers.
Check state of hal before mixer initialization call.
Actualize hal state if mixer initlialization ends well.
Add a sndCardId filed to 'SpecificHalData' structure which will contain
audio card if (from alsa).

Change-Id: I2e82a14ee6ba6e63f06fe2b498587783941b7b98
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

4 files changed, 134 insertions, 5 deletions

diff --git a/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.c b/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.c
new file mode 100644
index 0000000..37d6447
--- /dev/null
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.c
@@ -0,0 +1,79 @@
+/*
+ * 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 <stdbool.h>
+
+#include "../4a-hal-utilities/4a-hal-utilities-data.h"
+#include "../4a-hal-utilities/4a-hal-utilities-appfw-responses-handler.h"
+
+#include "4a-hal-controllers-alsacore-link.h"
+
+/*******************************************************************************
+ *		HAL controllers alsacore calls funtions			       *
+ ******************************************************************************/
+
+bool HalCtlsGetCardIdByCardPath(afb_dynapi *apiHandle, struct SpecificHalData *currentCtlHalData)
+{
+	int *cardId;
+
+	char *cardIdString = NULL;
+	char **returnedStatus, **returnedInfo;
+
+	enum CallError returnedError;
+
+	json_object *toSendJ, *returnJ, *responsJ, *devidJ;
+
+	cardId = alloca(sizeof(int));
+	*cardId = -1;
+
+	wrap_json_pack(&toSendJ, "{s:s}", "devpath", currentCtlHalData->sndCard);
+
+	if(afb_dynapi_call_sync(apiHandle, ALSACORE_API, ALSACORE_GETINFO_VERB, toSendJ, &returnJ)) {
+		returnedStatus = alloca(sizeof(char *));
+		returnedInfo = alloca(sizeof(char *));
+
+		returnedError = HalUtlHandleAppFwCallError(apiHandle, ALSACORE_API, ALSACORE_GETINFO_VERB, returnJ, returnedStatus, returnedInfo);
+		AFB_DYNAPI_WARNING(apiHandle,
+				   "Error %i during call to verb %s of %s api",
+				   (int) returnedError,
+				   ALSACORE_GETINFO_VERB,
+				   ALSACORE_API);
+	}
+	else if(json_object_object_get_ex(returnJ, "response", &responsJ)) {
+		if(json_object_object_get_ex(responsJ, "devid", &devidJ) && json_object_is_type(devidJ, json_type_string)) {
+			cardIdString = (char *) json_object_get_string(devidJ);
+			if(sscanf(cardIdString, "hw:%i", cardId) <= 0)
+				AFB_DYNAPI_WARNING(apiHandle, "Couldn't get valid devid from string: '%s'", cardIdString);
+		}
+		else {
+			AFB_DYNAPI_WARNING(apiHandle, "Response devid is not present/valid");
+		}
+
+		currentCtlHalData->sndCardId = *cardId;
+
+		return true;
+	}
+
+	currentCtlHalData->sndCardId = *cardId;
+
+	return false;
+}
+
diff --git a/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.h b/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.h
new file mode 100644
index 0000000..19ff9e5
--- /dev/null
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-alsacore-link.h
@@ -0,0 +1,30 @@
+/*
+ * 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 HAL_CTLS_ALSACORE_LINK_INCLUDE_
+#define HAL_CTLS_ALSACORE_LINK_INCLUDE_
+
+#include <stdio.h>
+#include <stdbool.h>
+
+#define ALSACORE_API		"alsacore"
+#define ALSACORE_GETINFO_VERB	"infoget"
+
+// HAL controllers alsacore calls funtions
+bool HalCtlsGetCardIdByCardPath(afb_dynapi *apiHandle, struct SpecificHalData *currentCtlHalData);
+
+#endif /* HAL_CTLS_ALSACORE_LINK_INCLUDE_ */
\ No newline at end of file
diff --git a/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c b/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
index 972cc53..6656ddc 100644
--- a/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
@@ -29,6 +29,7 @@
 #include "../4a-hal-utilities/4a-hal-utilities-verbs-loader.h"
 
 #include "4a-hal-controllers-api-loader.h"
+#include "4a-hal-controllers-alsacore-link.h"
 #include "4a-hal-controllers-cb.h"
 
 // Default api to print log when apihandle not available
@@ -90,7 +91,6 @@ static int HalCtlsInitOneApi(afb_dynapi *apiHandle)
 
 	// Fill SpecificHalDatadata structure
 	currentCtlHalData->internal = (unsigned int) true;
-	currentCtlHalData->status = HAL_STATUS_UNAVAILABLE;
 
 	currentCtlHalData->apiName = (char *) ctrlConfig->api;
 	currentCtlHalData->sndCard = (char *) ctrlConfig->uid;
@@ -105,8 +105,11 @@ static int HalCtlsInitOneApi(afb_dynapi *apiHandle)
 
 	currentCtlHalData->ctlHalSpecificData->ctlHalStreamsData.count = 0;
 
-	// TODO JAI: Search for hw sndCard
-	// TODO JAI: Update alsa command of HalCtl to use alsa-softmixer/alsa-core data
+	if(HalCtlsGetCardIdByCardPath(apiHandle, currentCtlHalData))
+		currentCtlHalData->status = HAL_STATUS_AVAILABLE;
+	else
+		currentCtlHalData->status = HAL_STATUS_UNAVAILABLE;
+
 	// TODO JAI: handle refresh of hal status using /dev/snd/byId (or /dev/snd/byId)
 
 	return CtlConfigExec(apiHandle, ctrlConfig);
diff --git a/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c b/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c
index b37000d..2d0f400 100644
--- a/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c
@@ -28,6 +28,7 @@
 
 #include "4a-hal-controllers-cb.h"
 #include "4a-hal-controllers-mixer-handler.h"
+#include "4a-hal-controllers-alsacore-link.h"
 
 /*******************************************************************************
  *		HAL controllers sections parsing functions		       *
@@ -126,7 +127,10 @@ void HalCtlsActionOnStream(afb_request *request)
 		return;
 	}
 
-	// TODO JAI: check status of hal before doing anything
+	if(currentCtlHalData->status != HAL_STATUS_AVAILABLE) {
+		afb_request_fail(request, "hal_unavailable", "Seems that hal is not available");
+		return;
+	}
 
 	// TODO JAI : remove verb to call prefix, each hal should have its own api in softmixer, and each streams should be created as verb by mixer
 	verbToCallSize = (int) strlen(mixerVerbName) + (int) strlen(request->verb) + 2;
@@ -251,7 +255,18 @@ void HalCtlsInitMixer(afb_request *request)
 		return;
 	}
 
-	// TODO JAI: test hal status (card is detected)
+	switch(currentCtlHalData->status) {
+		case HAL_STATUS_UNAVAILABLE:
+			afb_request_fail(request, "hal_unavailable", "Seems that the hal corresponding card was not found by alsacore at startup");
+			return;
+
+		case HAL_STATUS_READY:
+			afb_request_success(request, NULL, "Seems that the hal mixer is already initialized");
+			return;
+
+		case HAL_STATUS_AVAILABLE:
+			break;
+	}
 
 	if(afb_dynapi_call_sync(apiHandle, apiToCall, "create", json_object_get(currentCtlHalData->ctlHalSpecificData->halMixerJ), &returnJ)) {
 		HalUtlHandleAppFwCallErrorInRequest(request, apiToCall, "create", returnJ, "mixer_create");
@@ -271,6 +286,8 @@ void HalCtlsInitMixer(afb_request *request)
 				      toReturnJ,
 				      "Seems that create call to api %s succeed with no warning raised",
 				      apiToCall);
+
+		currentCtlHalData->status = HAL_STATUS_READY;
 	}
 	else {
 		afb_request_fail_f(request,