Process and handle alsa controls map

Process and handle alsa controls map by :
Parse and store info from 'halmap' section into a structure.
If the hal is available :
	- Test if controls are available (if use of existing control).
	- Create new controls (if use of control to create).
	- Add a verb for each element of the section.
	- Handle call to alsa when a verb request is detected.
	- Resgister to event from this device.
	- Handle call to action if event on this control is detected.

Change-Id: I246e16e9d02e64a1778f5c78d2458a33bdfb6d7e
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

1 files changed, 294 insertions, 3 deletions

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 5168a1d..e52639f 100644
--- a/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-cb.c
@@ -31,6 +31,86 @@
 #include "4a-hal-controllers-alsacore-link.h"
 
 /*******************************************************************************
+ *		HAL controller event handler function			       *
+ ******************************************************************************/
+
+void HalCtlsDispatchApiEvent(afb_dynapi *apiHandle, const char *evtLabel, json_object *eventJ)
+{
+	int numid, idx;
+
+	char cardIdString[6];
+
+	char *alsaCoreLabel;
+
+	CtlConfigT *ctrlConfig;
+	CtlSourceT source;
+
+	struct SpecificHalData *currentHalData;
+	struct CtlHalAlsaMapT *currentHalAlsaCtlsT;
+
+	json_object *valuesJ;
+
+	AFB_ApiDebug(apiHandle, "%s: evtname=%s [msg=%s]", __func__, evtLabel, json_object_get_string(eventJ));
+
+	ctrlConfig = (CtlConfigT *) afb_dynapi_get_userdata(apiHandle);
+	if(! ctrlConfig) {
+		AFB_ApiError(apiHandle, "%s: Can't get current hal controller config", __func__);
+		return;
+	}
+
+	currentHalData = (struct SpecificHalData *) ctrlConfig->external;
+	if(! currentHalData) {
+		AFB_ApiWarning(apiHandle, "%s: Can't get current hal controller data", __func__);
+		return;
+	}
+
+	snprintf(cardIdString, 6, "hw:%i", currentHalData->sndCardId);
+	currentHalAlsaCtlsT = currentHalData->ctlHalSpecificData->ctlHalAlsaMapT;
+
+	asprintf(&alsaCoreLabel, "%s/%s", ALSACORE_API, cardIdString);
+
+	if(strcmp(evtLabel, alsaCoreLabel) == 0 &&
+	   ! wrap_json_unpack(eventJ, "{s:i s:o !}", "id", &numid, "val", &valuesJ)) {
+		free(alsaCoreLabel);
+
+		// 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;
+
+					// TODO JAI: add weighting passing values (new valueJ object)
+
+					(void) ActionExecOne(&source, currentHalAlsaCtlsT->ctls[idx].action, valuesJ);
+				}
+
+				return;
+			}
+		}
+
+		AFB_ApiWarning(apiHandle, "%s: alsacore event with an unrecognized numid: %i, evtname=%s [msg=%s]",
+					  __func__,
+					  numid,
+					  evtLabel,
+					  json_object_get_string(eventJ));
+
+		return;
+	}
+
+	free(alsaCoreLabel);
+
+	AFB_ApiNotice(apiHandle,
+		      "%s: not an alsacore event '%s' [msg=%s]",
+		      __func__,
+		      evtLabel,
+		      json_object_get_string(eventJ));
+
+	CtrlDispatchApiEvent(apiHandle, evtLabel, eventJ);
+}
+
+/*******************************************************************************
  *		HAL controllers sections parsing functions		       *
  ******************************************************************************/
 
@@ -66,10 +146,221 @@ int HalCtlsHalMixerConfig(AFB_ApiT apiHandle, CtlSectionT *section, json_object
 	return 0;
 }
 
-// TODO JAI : to implement
-int HalCtlsHalMapConfig(AFB_ApiT apiHandle, CtlSectionT *section, json_object *StreamControlsJ)
+int HalCtlsProcessOneHalMapObject(AFB_ApiT apiHandle, struct CtlHalAlsaMap *alsaMap, json_object *AlsaMapJ)
+{
+	char *action = NULL, *typename = NULL;
+
+	json_object *alsaJ = NULL, *createAlsaCtlJ = NULL;
+
+	AFB_ApiDebug(apiHandle, "%s: AlsaMapJ=%s", __func__, 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_ApiError(apiHandle, "%s: parsing error, map should only contains [label]|[uid]|[tag]|[info]|[alsa]|[action] in:\n-- %s", __func__, 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_ApiError(apiHandle, "%s: parsing error, alsa json should only contains [name]|[numid]||[value]|[create] in:\n-- %s", __func__, 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_ApiError(apiHandle, "%s: parsing error, alsa creation json should only contains [type]|[count]|[minval]|[maxval]|[step] in:\n-- %s", __func__, json_object_get_string(alsaJ));
+			return -3;
+		}
+
+		if(typename && (alsaMap->ctl.alsaCtlCreation->type = HalCtlsMapsAlsaTypeToEnum(typename)) == SND_CTL_ELEM_TYPE_NONE) {
+			AFB_ApiError(apiHandle, "%s: Couldn't get alsa type from string %s in:\n-- %s", __func__, 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_ApiError(apiHandle,
+			     "%s: Can't have both a control name (%s) and a control uid (%i) in alsa object:\n-- %s",
+			     __func__,
+			     alsaMap->ctl.name,
+			     alsaMap->ctl.numid,
+			     json_object_get_string(alsaJ));
+		return -5;
+	}
+	else if(! alsaMap->ctl.name && alsaMap->ctl.numid <= 0) {
+		AFB_ApiError(apiHandle,
+			     "%s: Need at least a control name or a control uid in alsa object:\n-- %s",
+			     __func__,
+			     json_object_get_string(alsaJ));
+		return -6;
+	}
+
+	if(action)
+		alsaMap->actionJ = AlsaMapJ;
+
+	return 0;
+}
+
+int HalCtlsHandleOneHalMapObject(AFB_ApiT apiHandle, char *cardId, struct CtlHalAlsaMap *alsaMap)
+{
+	json_object *valueJ;
+
+	if(alsaMap->ctl.alsaCtlCreation) {
+		if(HalCtlsCreateAlsaCtl(apiHandle, cardId, &alsaMap->ctl)) {
+			AFB_ApiError(apiHandle,
+				"%s: An error happened when trying to create a new alsa control",
+				__func__);
+			return -1;
+		}
+	}
+	else if(HalCtlsGetAlsaCtlInfo(apiHandle, cardId, &alsaMap->ctl)) {
+		AFB_ApiError(apiHandle,
+			     "%s: An error happened when trying to get existing alsa control info",
+			     __func__);
+		return -2;
+	}
+
+	if(alsaMap->ctl.value) {
+		// TODO JAI: add weighting passing values on currentAlsaCtl->value (and put them into valueJ json)
+
+		valueJ = json_object_new_int(alsaMap->ctl.value);
+		if(HalCtlsSetAlsaCtlValue(apiHandle, cardId, alsaMap->ctl.numid, valueJ)) {
+			AFB_ApiError(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));
+			return -3;
+		}
+	}
+
+	if(alsaMap->actionJ) {
+		alsaMap->action = calloc(1, sizeof(CtlActionT));
+		if(ActionLoadOne(apiHandle, alsaMap->action, alsaMap->actionJ, 0)) {
+			AFB_ApiError(apiHandle,
+				     "%s: Didn't succeed to load action using alsa object:\n-- %s",
+				     __func__,
+				     json_object_get_string(alsaMap->actionJ));
+			return -4;
+		}
+	}
+
+	if(afb_dynapi_add_verb(apiHandle, alsaMap->uid, alsaMap->info, HalCtlsActionOnAlsaCtl, (void *) alsaMap, NULL, 0)) {
+		AFB_ApiError(apiHandle,
+			     "%s: Didn't to create verb for current alsa control to load action using alsa object:\n-- %s",
+			     __func__,
+			     json_object_get_string(alsaMap->actionJ));
+		return -5;
+	}
+
+	return 0;
+}
+
+int HalCtlsProcessAllHalMap(AFB_ApiT apiHandle, json_object *AlsaMapJ, struct CtlHalAlsaMapT *currentCtlHalAlsaMapT)
 {
-	AFB_ApiWarning(apiHandle, "JAI :%s not implemented yet", __func__);
+	int idx, err = 0;
+
+	struct CtlHalAlsaMap *ctlMaps;
+
+	switch(json_object_get_type(AlsaMapJ)) {
+		case json_type_array:
+			currentCtlHalAlsaMapT->ctlsCount = json_object_array_length(AlsaMapJ);
+			break;
+
+		case json_type_object:
+			currentCtlHalAlsaMapT->ctlsCount = 1;
+			break;
+
+		default:
+			currentCtlHalAlsaMapT->ctlsCount = 0;
+			currentCtlHalAlsaMapT->ctls = NULL;
+			AFB_ApiWarning(apiHandle, "%s: couldn't get content of 'halmap' section in:\n-- %s", __func__, json_object_get_string(AlsaMapJ));
+			return -3;
+	}
+
+	ctlMaps = calloc(currentCtlHalAlsaMapT->ctlsCount, sizeof(struct CtlHalAlsaMap));
+
+	for(idx = 0; idx < currentCtlHalAlsaMapT->ctlsCount; idx++)
+		err += HalCtlsProcessOneHalMapObject(apiHandle, &ctlMaps[idx], currentCtlHalAlsaMapT->ctlsCount == 1 ? AlsaMapJ : json_object_array_get_idx(AlsaMapJ, idx));
+
+	currentCtlHalAlsaMapT->ctls = ctlMaps;
+
+	return err;
+}
+
+int HalCtlsHandleAllHalMap(AFB_ApiT apiHandle, int sndCardId, struct CtlHalAlsaMapT *currentCtlHalAlsaMapT)
+{
+	int idx, err = 0;
+
+	char cardIdString[6];
+
+	snprintf(cardIdString, 6, "hw:%i", sndCardId);
+
+	HalCtlsSubscribeToAlsaCardEvent(apiHandle, cardIdString);
+
+	for(idx = 0; idx < currentCtlHalAlsaMapT->ctlsCount; idx++)
+		err += HalCtlsHandleOneHalMapObject(apiHandle, cardIdString, &currentCtlHalAlsaMapT->ctls[idx]);
+
+	return err;
+}
+
+int HalCtlsHalMapConfig(AFB_ApiT apiHandle, CtlSectionT *section, json_object *AlsaMapJ)
+{
+	CtlConfigT *ctrlConfig;
+	struct SpecificHalData *currentHalData;
+
+	ctrlConfig = (CtlConfigT *) afb_dynapi_get_userdata(apiHandle);
+	if(! ctrlConfig)
+		return -1;
+
+	currentHalData = (struct SpecificHalData *) ctrlConfig->external;
+	if(! currentHalData)
+		return -2;
+
+	if(AlsaMapJ) {
+		currentHalData->ctlHalSpecificData->ctlHalAlsaMapT = calloc(1, sizeof(struct CtlHalAlsaMapT));
+
+		if(HalCtlsProcessAllHalMap(apiHandle, AlsaMapJ, currentHalData->ctlHalSpecificData->ctlHalAlsaMapT)) {
+			AFB_ApiError(apiHandle, "%s: failed to process 'halmap' section", __func__);
+			return -3;
+		}
+	}
+	else if(currentHalData->status == HAL_STATUS_UNAVAILABLE) {
+		AFB_ApiWarning(apiHandle, "%s: hal is unavailable, 'halmap' section data can't be handle", __func__);
+		return 1;
+	}
+	else if(currentHalData->sndCardId < 0) {
+		AFB_ApiError(apiHandle, "%s: hal alsa card id is not valid, 'halmap' section data can't be handle", __func__);
+		return -6;
+	}
+	else if(! currentHalData->ctlHalSpecificData->ctlHalAlsaMapT) {
+		AFB_ApiWarning(apiHandle, "%s: 'halmap' section data is empty", __func__);
+		return 2;
+	}
+	else if(! (currentHalData->ctlHalSpecificData->ctlHalAlsaMapT->ctlsCount > 0)) {
+		AFB_ApiWarning(apiHandle, "%s: no alsa controls defined in 'halmap' section", __func__);
+		return 3;
+	}
+	else if(HalCtlsHandleAllHalMap(apiHandle, currentHalData->sndCardId, currentHalData->ctlHalSpecificData->ctlHalAlsaMapT)) {
+		AFB_ApiError(apiHandle, "%s: failed to handle 'halmap' section", __func__);
+		return -9;
+	}
 
 	return 0;
 }