/
VoiceControlClient.cs
executable file
·993 lines (945 loc) · 37.7 KB
/
VoiceControlClient.cs
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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd 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.
* 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.
*/
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using static Interop.VoiceControl;
using static Interop.VoiceControlCommand;
namespace Tizen.Uix.VoiceControl
{
/// <summary>
/// Enumeration for the error values that can occur.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public enum Error
{
/// <summary>
/// Successful, no error.
/// </summary>
None,
/// <summary>
/// Out of memory.
/// </summary>
OutOfMemory,
/// <summary>
/// I/O error.
/// </summary>
IoError,
/// <summary>
/// Invalid parameter.
/// </summary>
InvalidParameter,
/// <summary>
/// No answer from the STT service.
/// </summary>
TimedOut,
/// <summary>
/// Device or resource busy.
/// </summary>
RecorderBusy,
/// <summary>
/// Permission denied.
/// </summary>
PermissionDenied,
/// <summary>
/// VC NOT supported.
/// </summary>
NotSupported,
/// <summary>
/// Invalid state.
/// </summary>
InvalidState,
/// <summary>
/// Invalid language.
/// </summary>
InvalidLanguage,
/// <summary>
/// No available engine.
/// </summary>
EngineNotFound,
/// <summary>
/// Operation failed.
/// </summary>
OperationFailed,
/// <summary>
/// Operation rejected.
/// </summary>
OperationRejected,
/// <summary>
/// List reached end.
/// </summary>
IterationEnd,
/// <summary>
/// List empty.
/// </summary>
Empty,
/// <summary>
/// Service reset.
/// </summary>
ServiceReset,
/// <summary>
/// Progress to ready is not finished.
/// </summary>
InProgressToReady,
/// <summary>
/// Progress to recording is not finished.
/// </summary>
InProgressToRecording,
/// <summary>
/// Progress to processing is not finished.
/// </summary>
InProgressToProcessing
};
/// <summary>
/// Enumeration for the client state.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public enum State
{
/// <summary>
/// 'None' state.
/// </summary>
None = 0,
/// <summary>
/// 'Initialized' state.
/// </summary>
Initialized = 1,
/// <summary>
/// 'Ready' state.
/// </summary>
Ready = 2,
/// <summary>
/// The state cannot be determined.
/// </summary>
Unavailable
};
/// <summary>
/// Enumeration for the service state.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public enum ServiceState
{
/// <summary>
/// 'None' state.
/// </summary>
None = 0,
/// <summary>
/// 'Ready' state.
/// </summary>
Ready = 1,
/// <summary>
/// 'Recording' state.
/// </summary>
Recording = 2,
/// <summary>
/// 'Processing' state.
/// </summary>
Processing = 3,
/// <summary>
/// The state cannot be determined.
/// </summary>
Unavailable
};
/// <summary>
/// Enumeration for the result event.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public enum ResultEvent
{
/// <summary>
/// Normal result.
/// </summary>
Success = 0,
/// <summary>
/// Rejected result.
/// </summary>
Rejected = 1
};
/// <summary>
/// Enumeration for the command type.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public enum CommandType
{
/// <summary>
/// Foreground command by the client.
/// </summary>
Foreground = 1,
/// <summary>
/// Background command by the client.
/// </summary>
Background = 2,
/// <summary>
/// The undefined command.
/// </summary>
Undefined = -1
};
/// <summary>
/// A main function of the voice control API registers the command and gets a notification for the recognition result.
/// Applications can add their own commands and provide results when their command is recognized by the user voice input.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public static class VoiceControlClient
{
private static event EventHandler<RecognitionResultEventArgs> _recognitionResult;
private static event EventHandler<StateChangedEventArgs> _stateChanged;
private static event EventHandler<ServiceStateChangedEventArgs> _serviceStateChanged;
private static event EventHandler<ErrorOccuredEventArgs> _errorOccured;
private static event EventHandler<CurrentLanguageChangedEventArgs> _currentLanguageChanged;
private static readonly Object _recognitionResultLock = new Object();
private static readonly Object _stateChangedLock = new Object();
private static readonly Object _serviceStateChangedLock = new Object();
private static readonly Object _errorOccuredLock = new Object();
private static readonly Object _currentLanguageChangedLock = new Object();
private static VcResultCb s_resultDelegate;
private static VcStateChangedCb s_stateDelegate;
private static VcServiceStateChangedCb s_serviceStateDelegate;
private static VcErrorCb s_errorDelegate;
private static VcCurrentLanguageChangedCb s_languageDelegate;
private static List<string> s_supportedLanguages;
private static VcSupportedLanguageCb s_supportedLanguagesCb;
private static VcResultCb s_resultCb;
private static RecognitionResult s_recognitionResult;
/// <summary>
/// Gets the current language.
/// A language is specified as an ISO 3166 alpha-2 two letter country-code
/// followed by ISO 639-1 for the two-letter language code.
/// For example, "ko_KR" for Korean, "en_US" for American English.
/// An empty string is returned in case of some internal error.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <value>
/// The current language in voice control.
/// </value>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <pre>
/// The state must be initialized or ready.
/// </pre>
public static string CurrentLanguage
{
get
{
string currentLanguage;
ErrorCode error = VcGetCurrentLanguage(out currentLanguage);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "CurrentLanguage Failed with error " + error);
return "";
}
return currentLanguage;
}
}
/// <summary>
/// Gets the current state of the voice control client.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <value>
/// The current state of the voice control client.
/// </value>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <pre>
/// The state must be initialized or ready.
/// </pre>
public static State State
{
get
{
State state;
ErrorCode error = VcGetState(out state);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "State Failed with error " + error);
return State.Unavailable;
}
return state;
}
}
/// <summary>
/// Gets the current state of the voice control service.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <value>
/// The current state of the voice control service.
/// </value>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <pre>
/// The state must be ready.
/// </pre>
public static ServiceState ServiceState
{
get
{
ServiceState state;
ErrorCode error = VcGetServiceState(out state);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "ServiceState Failed with error " + error);
return ServiceState.Unavailable;
}
return state;
}
}
/// <summary>
/// Sets the invocation name.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <remarks>
/// The invocation name is used to activate background commands. The invocation name can be same as the application name or any other phrase.
/// For example, an application "Tizen Sample" has a background command, "Play music", and the invocation name of the application is set to "Tizen Sample".
/// In order to activate the background command, users can say "Tizen Sample, Play music". The invocation name is dependent on the current language.
/// For example, if the current language is "en_US"(English), the invocation name is also "en_US".
/// If the current language is "ja_JP"(Japanese) and the invocation name is "en_US", the invocation name will not be recognized.
/// This function should be called before the SetCommandList().
/// </remarks>
/// <param name="name">Invocation name to be invoked by an application.</param>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="ArgumentException">This exception can be due to an invalid parameter.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready.
/// </pre>
public static void SetInvocationName(string name)
{
ErrorCode error = VcSetInvocationName(name);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "SetInvocationName Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Initializes the voice control.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to operation failed.</exception>
/// <exception cref="OutOfMemoryException">This exception can be due to out Of memory.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <post>
/// The state will be initialized.
/// </post>
public static void Initialize()
{
ErrorCode error = VcInitialize();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Initialize Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Deinitializes the voice control.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="InvalidOperationException">This exception can be due to operation failed.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
public static void Deinitialize()
{
ErrorCode error = VcDeinitialize();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Deinitialize Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Connects the voice control service.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="InvalidOperationException">This exception can be due to operation failed.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be initialized.
/// </pre>
/// <post>
/// The state must be ready.
/// </post>
public static void Prepare()
{
ErrorCode error = VcPrepare();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Prepare Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Disconnects the voice control service.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready.
/// </pre>
/// <post>
/// The state must be initialized.
/// </post>
public static void Unprepare()
{
ErrorCode error = VcUnprepare();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Unprepare Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Retrieves all the supported languages.
/// A language is specified as an ISO 3166 alpha-2 two letter country-code
/// followed by ISO 639-1 for the two-letter language code.
/// For example, "ko_KR" for Korean, "en_US" for American English.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="InvalidOperationException">This exception can be due to operation failed.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready or initialized.
/// </pre>
public static IEnumerable<string> GetSupportedLanguages()
{
s_supportedLanguages = new List<string>();
s_supportedLanguagesCb = (IntPtr language, IntPtr userData) =>
{
string languageStr = Marshal.PtrToStringAnsi(language);
s_supportedLanguages.Add(languageStr);
return true;
};
ErrorCode error = VcForeachSupportedLanguages(s_supportedLanguagesCb, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "GetSupportedLanguages Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
return s_supportedLanguages;
}
/// <summary>
/// Gets the system command list.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <returns>
/// The command list, else null in case of no system commands.
/// </returns>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public.
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <remarks>
/// In the system command list, there are system commands predefined by product manufacturers.
/// Those commands have the highest priority. Therefore, the user cannot set any commands similar to system commands.
/// </remarks>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="InvalidOperationException">This exception can be due to operation failed.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready.
/// </pre>
public static VoiceCommandList GetSystemCommandList()
{
IntPtr handle = IntPtr.Zero;
ErrorCode error = VcGetSystemCommandList(out handle);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "GetSystemCommandList Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
if (handle == IntPtr.Zero)
{
Log.Error(LogTag, "GetSystemCommandList handle is null");
return null;
}
SafeCommandListHandle list = new SafeCommandListHandle(handle);
return new VoiceCommandList(list);
}
/// <summary>
/// Requests to start the dialogue.
/// By using this function, the developer can start requesting the dialogue to the framework.
/// When the developer requests the dialogue, two types of texts, dispText and uttText can be sent by this function. dispText is a text for displaying and uttText is that for uttering.
/// For example, if dispText is "October 10th" and uttText is "Today is October 10th.", "October 10th" will be displayed on the screen and "Today is October 10th." will be spoken.
/// Also, the developer can set whether the dialogue starts automatically or not, using autoStart.
/// If the developer sets autoStart as True, the framework will start to record the next speech and continue the dialogue.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <remarks>
/// If autoStart is True, the recognition will start again. In this case, it can be restarted up to 4 times.
/// </remarks>
/// <param name="dispText">Text to be displayed on the screen.</param>
/// <param name="uttText">Text to be spoken.</param>
/// <param name="autoStart">A variable for setting whether the dialog session will be restarted automatically or not.</param>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="ArgumentException">This exception can be due to an invalid parameter.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready.
/// </pre>
public static void RequestDialog(string dispText, string uttText, bool autoStart)
{
ErrorCode error = VcRequestDialog(dispText, uttText, autoStart);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "RequestDialog Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
/// <summary>
/// Sets the command list.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <remarks>
/// The command type is valid for CommandType 'Foreground' or 'Background'.
/// The matched commands of the command list should be set and they should include type and command text at least.
/// </remarks>
/// <param name="list">Command list</param>
/// <param name="type">Command type</param>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="ArgumentException">This exception can be due to an invalid parameter.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state must be ready.
/// </pre>
public static void SetCommandList(VoiceCommandList list, CommandType type)
{
if ((type == CommandType.Foreground) || (type == CommandType.Background))
{
ErrorCode error = VcSetCommandList(list._handle, (VoiceCommandType)type);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "SetCommandList Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
else
{
throw ExceptionFactory.CreateException(ErrorCode.InvalidParameter);
}
}
/// <summary>
/// Unsets the command list.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <param name="type">Command type</param>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="ArgumentException">This exception can be due to an invalid parameter.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <exception cref="UnauthorizedAccessException">This exception can be due to permission denied.</exception>
/// <pre>
/// The state should be ready.
/// </pre>
public static void UnsetCommandList(CommandType type)
{
if ((type == CommandType.Foreground) || (type == CommandType.Background))
{
VoiceCommandType commandType = VoiceCommandType.Foreground;
if (type == CommandType.Background)
commandType = VoiceCommandType.BackGround;
ErrorCode error = VcUnsetCommandList(commandType);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "UnsetCommandList Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
}
else
{
throw ExceptionFactory.CreateException(ErrorCode.InvalidParameter);
}
}
/// <summary>
/// Gets the recognition result.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>
/// http://tizen.org/privilege/recorder
/// </privilege>
/// <privlevel>
/// public
/// </privlevel>
/// <feature>
/// http://tizen.org/feature/speech.control
/// http://tizen.org/feature/microphone
/// </feature>
/// <exception cref="InvalidOperationException">This exception can be due to an invalid state.</exception>
/// <exception cref="ArgumentException">This exception can be due to an invalid parameter.</exception>
/// <exception cref="NotSupportedException">This exception can be due to not supported.</exception>
/// <returns>The recognition result if possible, else a null object.</returns>
/// <pre>
/// The state must be ready.
/// </pre>
public static RecognitionResult GetResult()
{
s_recognitionResult = null;
s_resultCb = (ResultEvent evt, IntPtr cmdList, IntPtr result, IntPtr userData) =>
{
s_recognitionResult = new RecognitionResult(evt, cmdList, result);
};
ErrorCode error = VcGetResult(s_resultCb, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "GetResult Failed with error " + error);
throw ExceptionFactory.CreateException(error);
}
return s_recognitionResult;
}
/// <summary>
/// Event to be invoked when the recognition is done.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <pre>
/// The state must be initialized.
/// </pre>
public static event EventHandler<RecognitionResultEventArgs> RecognitionResult
{
add
{
lock (_recognitionResultLock)
{
if (_recognitionResult == null)
{
s_resultDelegate = (ResultEvent evt, IntPtr cmdList, IntPtr result, IntPtr userData) =>
{
Log.Info(LogTag, "Recognition Result Event Triggered");
if ((cmdList != null) && (result != null))
{
RecognitionResultEventArgs args = new RecognitionResultEventArgs(new RecognitionResult(evt, cmdList, result));
_recognitionResult?.Invoke(null, args);
}
else
{
Log.Info(LogTag, "Recognition Result Event null received");
}
};
ErrorCode error = VcSetResultCb(s_resultDelegate, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Add RecognitionResult Failed with error " + error);
}
}
_recognitionResult += value;
}
}
remove
{
lock (_recognitionResultLock)
{
_recognitionResult -= value;
if (_recognitionResult == null)
{
ErrorCode error = VcUnsetResultCb();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Remove RecognitionResult Failed with error " + error);
}
}
}
}
}
/// <summary>
/// Event to be invoked when the VoiceControl service state changes.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <pre>
/// The state must be initialized.
/// </pre>
public static event EventHandler<ServiceStateChangedEventArgs> ServiceStateChanged
{
add
{
lock (_serviceStateChangedLock)
{
if (_serviceStateChanged == null)
{
s_serviceStateDelegate = (ServiceState previous, ServiceState current, IntPtr userData) =>
{
ServiceStateChangedEventArgs args = new ServiceStateChangedEventArgs(previous, current);
_serviceStateChanged?.Invoke(null, args);
};
ErrorCode error = VcSetServiceStateChangedCb(s_serviceStateDelegate, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Add ServiceStateChanged Failed with error " + error);
}
}
_serviceStateChanged += value;
}
}
remove
{
lock (_serviceStateChangedLock)
{
_serviceStateChanged -= value;
if (_serviceStateChanged == null)
{
ErrorCode error = VcUnsetServiceStateChangedCb();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Remove ServiceStateChanged Failed with error " + error);
}
}
}
}
}
/// <summary>
/// Event to be invoked when the VoiceControl client state changes.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <pre>
/// The state must be initialized.
/// </pre>
public static event EventHandler<StateChangedEventArgs> StateChanged
{
add
{
lock (_stateChangedLock)
{
if (_stateChanged == null)
{
s_stateDelegate = (State previous, State current, IntPtr userData) =>
{
StateChangedEventArgs args = new StateChangedEventArgs(previous, current);
_stateChanged?.Invoke(null, args);
};
ErrorCode error = VcSetStateChangedCb(s_stateDelegate, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Add StateChanged Failed with error " + error);
}
}
_stateChanged += value;
}
}
remove
{
lock (_stateChangedLock)
{
_stateChanged -= value;
if (_stateChanged == null)
{
ErrorCode error = VcUnsetStateChangedCb();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Remove StateChanged Failed with error " + error);
}
}
}
}
}
/// <summary>
/// Event to be invoked when an error occurs.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <pre>
/// The state must be initialized.
/// </pre>
public static event EventHandler<ErrorOccuredEventArgs> ErrorOccured
{
add
{
lock (_errorOccuredLock)
{
if (_errorOccured == null)
{
s_errorDelegate = (ErrorCode reason, IntPtr userData) =>
{
ErrorOccuredEventArgs args = new ErrorOccuredEventArgs(reason);
_errorOccured?.Invoke(null, args);
};
ErrorCode error = VcSetErrorCb(s_errorDelegate, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Add ErrorOccured Failed with error " + error);
}
}
_errorOccured += value;
}
}
remove
{
lock (_errorOccuredLock)
{
_errorOccured -= value;
if (_errorOccured == null)
{
ErrorCode error = VcUnsetErrorCb();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Remove ErrorOccured Failed with error " + error);
}
}
}
}
}
/// <summary>
/// Event to be invoked when the default language changes.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <pre>
/// The state must be initialized.
/// </pre>
public static event EventHandler<CurrentLanguageChangedEventArgs> CurrentLanguageChanged
{
add
{
lock (_currentLanguageChangedLock)
{
if (_currentLanguageChanged == null)
{
s_languageDelegate = (IntPtr previousLanguage, IntPtr currentLanguage, IntPtr userData) =>
{
string previousLanguageString = Marshal.PtrToStringAnsi(previousLanguage);
string currentLanguageString = Marshal.PtrToStringAnsi(currentLanguage);
CurrentLanguageChangedEventArgs args = new CurrentLanguageChangedEventArgs(previousLanguageString, currentLanguageString);
_currentLanguageChanged?.Invoke(null, args);
};
ErrorCode error = VcSetCurrentLanguageChangedCb(s_languageDelegate, IntPtr.Zero);
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Add CurrentLanguageChanged Failed with error " + error);
}
}
_currentLanguageChanged += value;
}
}
remove
{
lock (_currentLanguageChangedLock)
{
_currentLanguageChanged -= value;
if (_currentLanguageChanged == null)
{
ErrorCode error = VcUnsetCurrentLanguageChangedCb();
if (error != ErrorCode.None)
{
Log.Error(LogTag, "Remove CurrentLanguageChanged Failed with error " + error);
}
}
}
}
}
}
}