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>

3 files changed, 235 insertions, 0 deletions

diff --git a/src/plugins/core/include/VRAgentsObserver.h b/src/plugins/core/include/VRAgentsObserver.h
new file mode 100644
index 0000000..d4c0c7b
--- /dev/null
+++ b/src/plugins/core/include/VRAgentsObserver.h
@@ -0,0 +1,67 @@
+/*
+ * 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_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
+#define VSHL_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
+
+#include <memory>
+
+#include "core/include/VRRequestProcessorDelegate.h"
+#include "interfaces/voiceagents/IVoiceAgentsChangeObserver.h"
+#include "utilities/logging/Logger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This class will observe the changes to the voiceagents data and transfers
+ * the actual handling responsibility to its delegate.
+ */
+class VRAgentsObserver
+    : public vshl::common::interfaces::IVoiceAgentsChangeObserver {
+public:
+  // Create a VRAgentsObserver.
+  static shared_ptr<VRAgentsObserver>
+  create(weak_ptr<VRRequestProcessorDelegate> delegate);
+
+  ~VRAgentsObserver();
+
+protected:
+  void OnDefaultVoiceAgentChanged(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> defaultVoiceAgent)
+      override;
+  void OnVoiceAgentAdded(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentRemoved(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentActiveWakeWordChanged(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentActivated(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentDeactivated(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+
+private:
+  // Constructor
+  VRAgentsObserver(weak_ptr<VRRequestProcessorDelegate> delegate);
+
+  // Delegate that needs to be informed of the voiceagent data changes.
+  weak_ptr<VRRequestProcessorDelegate> mWeakDelegate;
+};
+
+} // namespace core
+} // namespace vshl
+
+#endif // VSHL_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
diff --git a/src/plugins/core/include/VRRequest.h b/src/plugins/core/include/VRRequest.h
new file mode 100644
index 0000000..522ec78
--- /dev/null
+++ b/src/plugins/core/include/VRRequest.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_CORE_INCLUDE_VR_REQUEST_H_
+#define VSHL_CORE_INCLUDE_VR_REQUEST_H_
+
+#include <memory>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This class implements the notion of a Voice Recognition Request.
+ * Each VR Request is currently mapped to one voice agent.
+ */
+class VRRequest {
+public:
+    // API Verbs
+    static std::string VA_VERB_STARTLISTENING;
+    static std::string VA_VERB_CANCEL;
+
+    // Create a VRRequest.
+    static unique_ptr<VRRequest> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+        string requestId,
+        shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Destructor
+    ~VRRequest();
+
+    // Invokes the underlying voiceagent's startlistening API.
+    // Returns true if started successfully. False otherwise.
+    bool startListening();
+
+    // Cancels the voice recognition in the unlerlying voiceagent.
+    // Returns true if canceled successfully. False otherwise.
+    bool cancel();
+
+private:
+    // Constructor
+    VRRequest(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+        const string requestId,
+        shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Binding API reference.
+    shared_ptr<vshl::common::interfaces::IAFBApi> mApi;
+
+    // Voice agent associated with this request
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> mVoiceAgent;
+
+    // Request ID
+    string mRequestId;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace vshl
+
+#endif  // VSHL_CORE_INCLUDE_VR_REQUEST_H_
diff --git a/src/plugins/core/include/VRRequestProcessorDelegate.h b/src/plugins/core/include/VRRequestProcessorDelegate.h
new file mode 100644
index 0000000..94b7304
--- /dev/null
+++ b/src/plugins/core/include/VRRequestProcessorDelegate.h
@@ -0,0 +1,88 @@
+/*
+ * 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_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_
+#define VSHL_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_
+
+#include <memory>
+#include <unordered_map>
+
+#include "core/include/VRRequest.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+#include "utilities/uuid/UUIDGeneration.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This is a delegate for VRRequestProcessor actions.
+ * The lifetime and dependencies of this object is managed
+ * by VRRequestProcessor. It plays the role of a Delegate in
+ * Delegate pattern and a one shop stop for most of the core
+ * module's state.
+ */
+class VRRequestProcessorDelegate {
+public:
+    // create method
+    static shared_ptr<VRRequestProcessorDelegate> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Destructor
+    ~VRRequestProcessorDelegate();
+
+    // Set default voiceagent
+    void setDefaultVoiceAgent(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Get the default voiceagent
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> getDefaultVoiceAgent() const;
+
+    // Add new request to the list and start processing it.
+    // New request is created and startListening on the
+    // voiceagent is called.
+    string startRequestForVoiceAgent(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Cancel all requests
+    void cancelAllRequests();
+
+    // Get All outstanding requests
+    // Used only by Test
+    unordered_map<string, shared_ptr<VRRequest>> getAllRequests();
+
+private:
+    // Constructor
+    VRRequestProcessorDelegate(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Binding API reference
+    shared_ptr<vshl::common::interfaces::IAFBApi> mApi;
+
+    // Default voiceagent
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> mDefaultVoiceAgent;
+
+    // A map of voiceagent IDs and their respective VR Request objects.
+    unordered_map<string, shared_ptr<VRRequest>> mVRRequests;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace vshl
+
+#endif  // VSHL_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_