Add bluetooth hal plugin

Add first version of a hal plugin that will handle hal that
wants bluetooth as an audio device.

Change-Id: I4f5628ef9688c417b1b443fc3c4948cb23c17214
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

1 files changed, 195 insertions, 0 deletions

diff --git a/plugins/lib/bluetooth/hal-bt.c b/plugins/lib/bluetooth/hal-bt.c
new file mode 100644
index 0000000..32fbbf7
--- /dev/null
+++ b/plugins/lib/bluetooth/hal-bt.c
@@ -0,0 +1,195 @@
+/*
+ * 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 <wrap-json.h>
+
+#include <ctl-plugin.h>
+
+#include "hal-bt.h"
+#include "hal-bt-cb.h"
+#include "hal-bt-data.h"
+
+// Local (static) Hal manager data structure
+static struct HalBtPluginData localHalBtPluginData;
+
+CTLP_CAPI_REGISTER(HAL_BT_PLUGIN_NAME)
+
+// Call at initialisation time
+CTLP_ONLOAD(plugin, callbacks)
+{
+	AFB_ApiNotice(plugin->api, "Hal-Bt Plugin Register: uid='%s' 'info='%s'", plugin->uid, plugin->info);
+
+	memset(&localHalBtPluginData, '\0', sizeof(localHalBtPluginData));
+
+	AFB_RequireApi(plugin->api, BT_MANAGER_API, 1);
+
+	/* TDB JAI :
+		- Register 'init' plugin function (HAL_BT_PLUGIN_NAME#init) as onload action here (to avoid adding it in json)
+		- Register 'event' plugin function (HAL_BT_PLUGIN_NAME#event) as action for BT_MANAGER_API#BT_MANAGER_DEVICE_UPDATE_EVENT event here (to avoid adding it in json)
+	*/
+
+	return 0;
+}
+
+// Call at onload time
+CTLP_CAPI(init, source, argsJ, queryJ)
+{
+	unsigned int err;
+
+	struct json_object *toSendJ, *returnedJ, *returnedBtList = NULL;
+
+	AFB_ApiNotice(source->api, "Initializing HAL-BT plugin");
+
+	// Loading hal BT plugin specific verbs
+	if(afb_dynapi_add_verb(source->api,
+			       HAL_BT_GET_STREAMING_STATUS_VERB,
+			       "Get Bluetooth streaming status",
+			       HalBtGetStreamingStatus,
+			       (void *) &localHalBtPluginData,
+			       NULL,
+			       0)) {
+		AFB_ApiError(source->api, "%s: error while creating verb for bluetooth plugin : '%s'", __func__, HAL_BT_GET_STREAMING_STATUS_VERB);
+		return -1;
+	}
+
+	if(afb_dynapi_add_verb(source->api,
+			       HAL_BT_SET_STREAMING_STATUS_VERB,
+			       "Set Bluetooth streaming status",
+			       HalBtSetStreamingStatus,
+			       (void *) &localHalBtPluginData,
+			       NULL,
+			       0)) {
+		AFB_ApiError(source->api, "%s: error while creating verb for bluetooth plugin : '%s'", __func__, HAL_BT_SET_STREAMING_STATUS_VERB);
+		return -2;
+	}
+
+	if(afb_dynapi_add_verb(source->api, 
+			       HAL_BT_GET_CONNECTED_DEVICES_VERB,
+			       "Get connected Bluetooth devices list",
+			       HalBtGetConnectedBluetoothDevices,
+			       (void *) &localHalBtPluginData,
+			       NULL,
+			       0)) {
+		AFB_ApiError(source->api, "%s: error while creating verb for bluetooth plugin : '%s'", __func__, HAL_BT_GET_CONNECTED_DEVICES_VERB);
+		return -3;
+	}
+
+	if(afb_dynapi_add_verb(source->api,
+			       HAL_BT_GET_SELECTED_DEVICE_VERB,
+			       "Get selected Bluetooth device",
+			       HalBtGetSelectedBluetoothDevice,
+			       (void *) &localHalBtPluginData,
+			       NULL,
+			       0)) {
+		AFB_ApiError(source->api, "%s: error while creating verb for bluetooth plugin : '%s'", __func__, HAL_BT_GET_SELECTED_DEVICE_VERB);
+		return -4;
+	}
+
+	if(afb_dynapi_add_verb(source->api,
+			       HAL_BT_SET_SELECTED_DEVICE_VERB,
+			       "Set selected Bluetooth device",
+			       HalBtSetSelectedBluetoothDevice,
+			       (void *) &localHalBtPluginData,
+			       NULL,
+			       0)) {
+		AFB_ApiError(source->api, "%s: error while creating verb for bluetooth plugin : '%s'", __func__, HAL_BT_SET_SELECTED_DEVICE_VERB);
+		return -5;
+	}
+
+	// Register to Bluetooth manager
+	wrap_json_pack(&toSendJ, "{s:s}", "value", BT_MANAGER_DEVICE_UPDATE_EVENT);
+	if(AFB_ServiceSync(source->api, BT_MANAGER_API, BT_MANAGER_SUBSCRIBE_VERB, toSendJ, &returnedJ)) {
+		AFB_ApiError(source->api,
+			     "Error during call to verb %s of %s api",
+			     BT_MANAGER_API,
+			     BT_MANAGER_SUBSCRIBE_VERB);
+
+		return -6;
+	}
+	else if(! wrap_json_unpack(returnedJ, "{s:{s:s}}", "request", "info", NULL)) {
+		AFB_ApiError(source->api,
+			     "Couldn't subscribe to event '%s' during call to verb '%s' of api '%s'",
+			     BT_MANAGER_DEVICE_UPDATE_EVENT,
+			     BT_MANAGER_SUBSCRIBE_VERB,
+			     BT_MANAGER_API);
+		return -7;
+	}
+
+	if(AFB_ServiceSync(source->api, BT_MANAGER_API, BT_MANAGER_GET_DEVICES_VERB, NULL, &returnedJ)) {
+		AFB_ApiError(source->api,
+			     "Error during call to verb %s of %s api",
+			     BT_MANAGER_API,
+			     BT_MANAGER_GET_DEVICES_VERB);
+
+		return -8;
+	}
+	else if(wrap_json_unpack(returnedJ, "{s:{s:o}}", "response", "list", &returnedBtList)) {
+		AFB_ApiError(source->api,
+			     "Couldn't get bluetooth device list during call to verb '%s' of api '%s'",
+			     BT_MANAGER_GET_DEVICES_VERB,
+			     BT_MANAGER_API);
+		return -9;
+	}
+
+	if((err = HalBtDataHandleReceivedMutlipleBtDeviceData(&localHalBtPluginData, returnedBtList)))
+		return (10 * err);
+
+	if(localHalBtPluginData.selectedBtDevice) {
+		localHalBtPluginData.btStreamEnabled = 1;
+		/* TODO JAI : send selected device to softmixer (and enable stream here for now)
+					* Tell the softmixer that we want it as an input using 'bluealsa:HCI=hci0,DEV=F6:32:15:2A:80:70,PROFILE=a2dp'
+					  string as capture associated with an 'uid' using smixer verb 'set-capture'
+					* Enable capture stream to playback using 'uid' used at 'set-capture' call
+		*/
+	}
+
+	return 0;
+}
+
+// This receive Hal bluetooth plugin events
+CTLP_CAPI(events, source, argsJ, queryJ)
+{
+	struct HalBtDeviceData *previouslySelectedBtDevice = localHalBtPluginData.selectedBtDevice;
+
+	AFB_ApiNotice(source->api, "JAI: bt event received: %s", json_object_get_string(queryJ));
+
+	if(HalBtDataHandleReceivedSingleBtDeviceData(&localHalBtPluginData, queryJ)) {
+		AFB_ApiError(source->api, "Error while decoding bluetooth event received json (%s)", json_object_get_string(queryJ));
+		return -1;
+	}
+
+	if(localHalBtPluginData.selectedBtDevice && localHalBtPluginData.selectedBtDevice != previouslySelectedBtDevice) {
+		localHalBtPluginData.btStreamEnabled = 1;
+		/* TODO JAI : send selected device to softmixer (and enable stream here for now)
+					* Tell the softmixer that we want it as an input using 'bluealsa:HCI=hci0,DEV=F6:32:15:2A:80:70,PROFILE=a2dp'
+					  string as capture associated with an 'uid' using smixer verb 'set-capture'
+					* Enable capture stream to playback using 'uid' used at 'set-capture' call
+		*/
+	}
+	else if (! localHalBtPluginData.selectedBtDevice) {
+		localHalBtPluginData.btStreamEnabled = 0;
+		// TODO JAI: Disable capture stream to playback using 'uid' used at 'set-capture' call
+	}
+
+	return 0;
+}
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