SPEC-1924: AGL Speech Framework's Voice Service High Level 1.0 Release.

Details:
1) Control plugin implementation for VSHL 1.0
2) Exposed APIs that are documented in the confluence page
   https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture
3) Implemented 39 unit tests based on GTest framework to test all the low
level components of VSHL binding.
4) Implemented a HTML5 based VSHL API tester application to test VSHL APIs.

API specification:
https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture#SpeechEGArchitecture-HighLevelVoiceService

Test performed:
1) Tested AGL service running Alexa Auto SDK https://github.com/alexa/aac-sdk on Ubuntu 16.04 and Renesas R-Car M3 board.

License:
Apache 2.0

Developers/Owners:
Naveen Bobbili (nbobbili@amazon.com)
Prakash Buddhiraja (buddhip@amazon.com)
Shotaro Uchida (shotaru@amazon.co.jp)

Change-Id: I3370f4ad65aff030f24f4ad571fb02d525bbfbca
Signed-off-by: Naveen Bobbili  <nbobbili@amazon.com>

6 files changed, 419 insertions, 0 deletions

diff --git a/src/plugins/interfaces/afb/IAFBApi.h b/src/plugins/interfaces/afb/IAFBApi.h
new file mode 100644
index 0000000..cd98006
--- /dev/null
+++ b/src/plugins/interfaces/afb/IAFBApi.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_AFBAPI_H_
+#define VSHL_COMMON_INTERFACES_AFBAPI_H_
+
+#include <memory>
+#include <string>
+
+#include <json-c/json_object.h>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/**
+ * Interface to represent AFB Request.
+ */
+class IAFBRequest {
+public:
+    /**
+     * Gets the native request object.
+     */
+    virtual void* getNativeRequest() = 0;
+};
+
+/**
+ * Interface to encapsulate all AFB (AGL Application Framework Binding)
+ * functions.
+ */
+class IAFBApi {
+public:
+    /**
+     * Interface to represent AFB Event
+     */
+    class IAFBEvent {
+    public:
+        /**
+         * Gets human readable name of the event.
+         */
+        virtual std::string getName() const = 0;
+
+        /**
+         * Returns true if event is valid. False otherwise.
+         */
+        virtual bool isValid() = 0;
+
+        /**
+         * Publish event to all observers.
+         *
+         * @return The number of observers that received the event.
+         */
+        virtual int publishEvent(struct json_object* payload) = 0;
+
+        /**
+         * Subscribe to the event
+         *
+         * @c request Party interested in the event.
+         */
+        virtual bool subscribe(IAFBRequest& request) = 0;
+
+        /**
+         * Unsubscribe to the event
+         *
+         * @c request Party no longer interested in the event.
+         */
+        virtual bool unsubscribe(IAFBRequest& request) = 0;
+    };
+
+    virtual std::shared_ptr<IAFBEvent> createEvent(const std::string& eventName) = 0;
+
+    virtual int callSync(
+        const std::string& api,
+        const std::string& verb,
+        struct json_object* request,
+        struct json_object** result,
+        std::string& error,
+        std::string& info) = 0;
+};
+
+}  // namespace interfaces
+}  // namespace common
+}  // namespace vshl
+
+#endif  // VSHL_COMMON_INTERFACES_AFBAPI_H_
diff --git a/src/plugins/interfaces/capabilities/ICapability.h b/src/plugins/interfaces/capabilities/ICapability.h
new file mode 100644
index 0000000..4b134b7
--- /dev/null
+++ b/src/plugins/interfaces/capabilities/ICapability.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_ICAPABILITY_H_
+#define VSHL_COMMON_INTERFACES_ICAPABILITY_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface defines the structure for a specific voiceagent capability.
+ */
+class ICapability {
+public:
+  /*
+   * Returns the capability's name.
+   */
+  virtual string getName() const = 0;
+
+  /*
+   * Returns the list of upstream messages.
+   */
+  virtual list<string> getUpstreamMessages() const = 0;
+
+  /*
+   * Returns the list of downstream messages
+   */
+  virtual list<string> getDownstreamMessages() const = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~ICapability() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_ICAPABILITY_H_
diff --git a/src/plugins/interfaces/utilities/events/IEventFilter.h b/src/plugins/interfaces/utilities/events/IEventFilter.h
new file mode 100644
index 0000000..33d8202
--- /dev/null
+++ b/src/plugins/interfaces/utilities/events/IEventFilter.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
+#define VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
+
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+/*
+ * This is an abstract class that is responsible for filtering the events
+ * that are delivered to the high level voice service from apps or voiceagents.
+ */
+class IEventFilter {
+public:
+    // Name of the event filter.
+    virtual string getName() = 0;
+
+    // Every event filter needs to implement this method and
+    // return true if consuming the event or false otherwise.
+    virtual bool onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) = 0;
+
+    // Destructor
+    virtual ~IEventFilter() = default;
+};
+
+}  // namespace interfaces
+}  // namespace common
+}  // namespace vshl
+
+#endif  // VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
diff --git a/src/plugins/interfaces/utilities/logging/ILogger.h b/src/plugins/interfaces/utilities/logging/ILogger.h
new file mode 100644
index 0000000..a2618bc
--- /dev/null
+++ b/src/plugins/interfaces/utilities/logging/ILogger.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_LOGGER_H_
+#define VSHL_COMMON_INTERFACES_LOGGER_H_
+
+#include <string>
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+class ILogger {
+public:
+  enum Level {
+    DEBUG,
+    INFO,
+    WARNING,
+    ERROR,
+    NOTICE,
+  };
+
+  virtual void log(Level level, const std::string &tag,
+                   const std::string &message) = 0;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_LOGGER_H_
diff --git a/src/plugins/interfaces/voiceagents/IVoiceAgent.h b/src/plugins/interfaces/voiceagents/IVoiceAgent.h
new file mode 100644
index 0000000..367ad72
--- /dev/null
+++ b/src/plugins/interfaces/voiceagents/IVoiceAgent.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
+#define VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
+
+#include <memory>
+#include <string>
+#include <unordered_set>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface define the structure for VoiceAgent Information.
+ * The implementation of this structure is owned by voiceagents module.
+ */
+class IVoiceAgent {
+public:
+  /*
+   * Set the active wakeword for this voiceagent
+   */
+  virtual bool setActiveWakeWord(const string &wakeword) = 0;
+
+  /*
+   * Sets the activation state of this voiceagent
+   */
+  virtual void setIsActive(bool active) = 0;
+
+  /*
+   * Returns the voiceagent's ID.
+   */
+  virtual string getId() const = 0;
+
+  /*
+   * Returns the voiceagent's name.
+   */
+  virtual string getName() const = 0;
+
+  /*
+   * Returns the voiceagent's description.
+   */
+  virtual string getDescription() const = 0;
+
+  /*
+   * Returns the voiceagent's API.
+   */
+  virtual string getApi() const = 0;
+
+  /*
+   * Returns the voiceagent's vendor information/
+   */
+  virtual string getVendor() const = 0;
+
+  /*
+   * Returns the list of wakewords mapped to the voiceagent.
+   */
+  virtual shared_ptr<unordered_set<string>> getWakeWords() const = 0;
+
+  /*
+   * Returns true if the voiceagent is active. False otherwise.
+   */
+  virtual bool isActive() const = 0;
+
+  /*
+   * Returns the active wakeword for the voiceagent.
+   */
+  virtual string getActiveWakeword() const = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~IVoiceAgent() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
diff --git a/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h b/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h
new file mode 100644
index 0000000..e552ab5
--- /dev/null
+++ b/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file 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 VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_
+#define VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_
+
+#include <memory>
+#include <string>
+
+#include "interfaces/voiceagents/IVoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface is used to observe changes to the voiceagents datastore.
+ * The voiceagents data store is contained in the voiceagents module.
+ */
+class IVoiceAgentsChangeObserver {
+public:
+  /**
+   * This method notifies the observers that the default voiceagent selection
+   * has been updated.
+   */
+  virtual void
+  OnDefaultVoiceAgentChanged(shared_ptr<IVoiceAgent> defaultVoiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that a new voiceagent has been added.
+   */
+  virtual void OnVoiceAgentAdded(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that a voiceagent is removed.
+   */
+  virtual void OnVoiceAgentRemoved(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that active wakeword for a voiceagent is
+   * updated.
+   */
+  virtual void
+  OnVoiceAgentActiveWakeWordChanged(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that the voiceagent has been activated.
+   */
+  virtual void OnVoiceAgentActivated(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that the voiceagent has been activated.
+   */
+  virtual void OnVoiceAgentDeactivated(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~IVoiceAgentsChangeObserver() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_