The Voice control API provides functions for registering command and getting notification when registered command is recognized.

Required Header

#include <voice_control.h>

Overview

A main function of Voice Control API register command and gets notification for recognition result. Applications can add their own commands and be provided result when their command is recognized by user voice input. To use of Voice Control, use the following steps:
1. Initialize
2. Register callback functions for notifications
3. Connect to voice control service asynchronously. The state should be changed to Ready
4. Make command list as the following step and Step 4 is called repeatedly for each command which an application wants
4-1. Create command list handle
4-2. Create command handle
4-3. Set command and type for command handle
4-4. Add command handle to command list
5. Set command list for recognition
6. Set an invocation name for an application
7. Get recognition results
8. Request the dialogue
9. If an application wants to finish voice control,
9-1. Destroy command and command list handle
9-2. Deinitialize
An application can obtain command handle from command list, and also get information from handle. The Voice Control API also notifies you (by callback mechanism) when the states of client and service are changed, command is recognized, current language is changed or error occurred. An application should register callback functions: vc_state_changed_cb(), vc_service_state_changed_cb(), vc_result_cb(), vc_current_language_changed_cb(), vc_error_cb().

State Diagram

The following diagram shows the life cycle and the states of the Voice Control.

The following diagram shows the states of Voice Control service.

State Transitions

FUNCTION	PRE-STATE	POST-STATE	SYNC TYPE
vc_initialize()	None	Initialized	SYNC
vc_deinitialize()	Initialized	None	SYNC
vc_prepare()	Initialized	Ready	ASYNC
vc_unprepare()	Ready	Initialized	SYNC

State Dependent Function Calls

The following table shows state-dependent function calls. It is forbidden to call functions listed below in wrong states. Violation of this rule may result in an unpredictable behavior.

FUNCTION	VALID STATES	DESCRIPTION
vc_initialize()	None	All functions must be called after vc_initialize()
vc_deinitialize()	Initialized, Ready	This function should be called when an application want to finalize voice control using
vc_prepare()	Initialized	This function works asynchronously. If service start is failed, application gets the error callback.
vc_unprepare()	Ready
vc_foreach_supported_languages()	Initialized, Ready
vc_get_current_language()	Initialized, Ready
vc_get_state()	Initialized, Ready
vc_get_service_state()	Initialized, Ready
vc_get_result()	Ready
vc_get_system_command_list()	Ready
vc_set_command_list()	Ready
vc_unset_command_list()	Ready
vc_set_invocation_name()	Ready
vc_request_dialog()	Ready
vc_set_result_cb() vc_unset_result_cb() vc_set_state_changed_cb() vc_unset_state_changed_cb() vc_set_service_state_changed_cb() vc_unset_service_state_changed_cb() vc_set_current_language_changed_cb() vc_unset_current_language_changed_cb() vc_set_error_cb() vc_unset_error_cb()	Initialized	All callback function should be registered in Initialized state

Related Features

This API is related with the following features:

http://tizen.org/feature/microphone
http://tizen.org/feature/speech.control
It is recommended to design feature related codes in your application for reliability.
You can check if a device supports the related features for this API by using System Information, thereby controlling the procedure of your application.
To ensure your application is only running on the device with specific features, please define the features in your manifest file using the manifest editor in the SDK.
More details on featuring your application can be found from Feature Element.

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.

Functions
int	vc_initialize (void)
	Initializes voice control.
int	vc_deinitialize (void)
	Deinitializes voice control.
int	vc_prepare (void)
	Connects the voice control service.
int	vc_unprepare (void)
	Disconnects the voice control service.
int	vc_foreach_supported_languages (vc_supported_language_cb callback, void *user_data)
	Retrieves all supported languages using callback function.
int	vc_get_current_language (char **language)
	Gets current language.
int	vc_get_state (vc_state_e *state)
	Gets current state of voice control client.
int	vc_get_service_state (vc_service_state_e *state)
	Gets current state of voice control service.
int	vc_get_system_command_list (vc_cmd_list_h *vc_sys_cmd_list)
	Gets the system command list.
int	vc_set_invocation_name (const char *name)
	Sets the invocation name.
int	vc_request_dialog (const char disp_text, const char utt_text, bool auto_start)
	Requests to start the dialogue.
int	vc_set_command_list (vc_cmd_list_h vc_cmd_list, int type)
	Sets command list.
int	vc_unset_command_list (int type)
	Unsets command list.
int	vc_get_result (vc_result_cb callback, void *user_data)
	Gets the recognition result.
int	vc_set_result_cb (vc_result_cb callback, void *user_data)
	Registers a callback function for getting recognition result.
int	vc_unset_result_cb (void)
	Unregisters the callback function.
int	vc_set_service_state_changed_cb (vc_service_state_changed_cb callback, void *user_data)
	Registers a callback function to be called when state is changed.
int	vc_unset_service_state_changed_cb (void)
	Unregisters the callback function.
int	vc_set_state_changed_cb (vc_state_changed_cb callback, void *user_data)
	Registers a callback function to be called when state is changed.
int	vc_unset_state_changed_cb (void)
	Unregisters the callback function.
int	vc_set_current_language_changed_cb (vc_current_language_changed_cb callback, void *user_data)
	Registers a callback function to be called when current language is changed.
int	vc_unset_current_language_changed_cb (void)
	Unregisters the callback function.
int	vc_set_error_cb (vc_error_cb callback, void *user_data)
	Registers a callback function to be called when an error occurred.
int	vc_unset_error_cb (void)
	Unregisters the callback function.
Typedefs
typedef void(*	vc_result_cb )(vc_result_event_e event, vc_cmd_list_h vc_cmd_list, const char result, void user_data)
	Called when client gets the recognition result.
typedef void(*	vc_current_language_changed_cb )(const char previous, const char current, void *user_data)
	Called when default language is changed.
typedef bool(*	vc_supported_language_cb )(const char language, void user_data)
	Called to retrieve supported language.
typedef void(*	vc_state_changed_cb )(vc_state_e previous, vc_state_e current, void *user_data)
	Called when the state of voice control client is changed.
typedef void(*	vc_service_state_changed_cb )(vc_service_state_e previous, vc_service_state_e current, void *user_data)
	Called when the state of voice control service is changed.
typedef void(*	vc_error_cb )(vc_error_e reason, void *user_data)
	Called when error occurred.
Defines
#define	VC_COMMAND_TYPE_FOREGROUND 1
	Definition for foreground command type.
#define	VC_COMMAND_TYPE_BACKGROUND 2
	Definition for background command type.
#define	VC_DIALOG_END 0
	Definition for ended dialog.
#define	VC_DIALOG_CONTINUE 1
	Definition for continued dialog.

Define Documentation

#define VC_COMMAND_TYPE_BACKGROUND 2

Definition for background command type.

Since :: 3.0

#define VC_COMMAND_TYPE_FOREGROUND 1

Definition for foreground command type.

Since :: 3.0

#define VC_DIALOG_CONTINUE 1

Definition for continued dialog.

Since :: 3.0

#define VC_DIALOG_END 0

Definition for ended dialog.

Since :: 3.0

Typedef Documentation

typedef void(* vc_current_language_changed_cb)(const char *previous, const char *current, void *user_data)

Called when default language is changed.

Since :: 3.0

Parameters:

[in]	previous	Previous language
[in]	current	Current language
[in]	user_data	The user data passed from the callback registration function

Precondition:: An application registers this callback to detect changing mode.

See also:: vc_set_current_language_changed_cb()

typedef void(* vc_error_cb)(vc_error_e reason, void *user_data)

Called when error occurred.

Since :: 3.0

Parameters:

[in]	reason	The error type (e.g. VC_ERROR_OUT_OF_MEMORY, VC_ERROR_TIMED_OUT)
[in]	user_data	The user data passed from the callback registration function

Precondition:: An application registers this callback to detect error.

See also:: vc_set_error_cb()

typedef void(* vc_result_cb)(vc_result_event_e event, vc_cmd_list_h vc_cmd_list, const char *result, void *user_data)

Called when client gets the recognition result.

Since :: 3.0

Remarks:: If the duplicated commands are recognized, the event(e.g. VC_RESULT_EVENT_REJECTED) of command may be rejected for selecting command as priority. If you set similar or same commands or the recognized results are multi-results, vc_cmd_list has the multi commands.

Parameters:

[in]	event	The result event (e.g. VC_RESULT_EVENT_RESULT_SUCCESS, VC_RESULT_EVENT_REJECTED)
[in]	vc_cmd_list	The recognized command list
[in]	result	The spoken text
[in]	user_data	The user data passed from the callback registration function

Precondition:: An application registers callback function.

See also:: vc_set_result_cb()

typedef void(* vc_service_state_changed_cb)(vc_service_state_e previous, vc_service_state_e current, void *user_data)

Called when the state of voice control service is changed.

Since :: 3.0

Parameters:

[in]	previous	A previous state
[in]	current	A current state
[in]	user_data	The user data passed from the callback registration function

Precondition:: An application registers this callback to detect changing service state.

See also:: vc_set_service_state_changed_cb()

typedef void(* vc_state_changed_cb)(vc_state_e previous, vc_state_e current, void *user_data)

Called when the state of voice control client is changed.

Since :: 3.0

Parameters:

[in]	previous	A previous state
[in]	current	A current state
[in]	user_data	The user data passed from the callback registration function

Precondition:: An application registers this callback to detect changing state.

See also:: vc_set_state_changed_cb()

typedef bool(* vc_supported_language_cb)(const char *language, void *user_data)

Called to retrieve supported language.

Since :: 3.0

Parameters:

[in]	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
[in]	user_data	The user data passed from the foreach function

Returns:: true to continue with the next iteration of the loop, false to break out of the loop

Precondition:: The function will invoke this callback.

Enumeration Type Documentation

enum vc_error_e

Enumeration for error codes.

Since :: 3.0

Enumerator:

VC_ERROR_NONE	Successful
VC_ERROR_OUT_OF_MEMORY	Out of Memory
VC_ERROR_IO_ERROR	I/O error
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_TIMED_OUT	No answer from service
VC_ERROR_RECORDER_BUSY	Busy recorder
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	VC NOT supported
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_INVALID_LANGUAGE	Invalid language
VC_ERROR_ENGINE_NOT_FOUND	No available engine
VC_ERROR_OPERATION_FAILED	Operation failed
VC_ERROR_OPERATION_REJECTED	Operation rejected
VC_ERROR_ITERATION_END	List reached end
VC_ERROR_EMPTY	List empty
VC_ERROR_SERVICE_RESET	Service daemon reset (Since 3.0)
VC_ERROR_IN_PROGRESS_TO_READY	In progress to ready (Since 3.0)
VC_ERROR_IN_PROGRESS_TO_RECORDING	In progress to recording (Since 3.0)
VC_ERROR_IN_PROGRESS_TO_PROCESSING	In progress to processing (Since 3.0)
VC_ERROR_NOT_SUPPORTED_FEATURE	Not supported feature of current engine (Since 4.0)

enum vc_result_event_e

Enumeration for result event.

Since :: 3.0

Enumerator:

VC_RESULT_EVENT_RESULT_SUCCESS	Normal result
VC_RESULT_EVENT_REJECTED	Rejected result

enum vc_service_state_e

Enumeration for service state.

Since :: 3.0

Enumerator:

VC_SERVICE_STATE_NONE	'None' state
VC_SERVICE_STATE_READY	'Ready' state
VC_SERVICE_STATE_RECORDING	'Recording' state
VC_SERVICE_STATE_PROCESSING	'Processing' state

enum vc_state_e

Enumeration for client state.

Since :: 3.0

Enumerator:

VC_STATE_NONE	'None' state
VC_STATE_INITIALIZED	'Initialized' state
VC_STATE_READY	'Ready' state

Function Documentation

int vc_deinitialize ( void )

Deinitializes voice control.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_OPERATION_FAILED	Operation failure
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

See also:: vc_deinitialize()

int vc_foreach_supported_languages	(	vc_supported_language_cb	callback,
		void *	user_data
	)

Retrieves all supported languages using callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to invoke
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_OPERATION_FAILED	Operation failure
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED or VC_STATE_READY.

Postcondition:: This function invokes vc_supported_language_cb() repeatedly for getting languages.

See also:: vc_supported_language_cb(); vc_get_current_language()

int vc_get_current_language ( char ** language )

Gets current language.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: If the function succeeds, language must be released with free() by you when you no longer need it.

Parameters:

[out] 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

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_OUT_OF_MEMORY	Out of memory
VC_ERROR_OPERATION_FAILED	Operation failure
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED or VC_STATE_READY.

See also:: vc_foreach_supported_languages()

int vc_get_result	(	vc_result_cb	callback,
		void *	user_data
	)

Gets the recognition result.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to get recognition result
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

See also:: vc_result_cb()

int vc_get_service_state ( vc_service_state_e * state )

Gets current state of voice control service.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[out] state The current state

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

See also:: vc_request_start(); vc_request_stop(); vc_request_cancel(); vc_set_service_state_changed_cb(); vc_unset_service_state_changed_cb()

int vc_get_state ( vc_state_e * state )

Gets current state of voice control client.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[out] state The current state

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

See also:: vc_state_changed_cb(); vc_set_state_changed_cb()

int vc_get_system_command_list ( vc_cmd_list_h * vc_sys_cmd_list )

Gets the system command list.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: In the system command list, there are system commands predefined by product manufacturers. Those commands have the highest priority. Therefore, the user can not set any commands same with the system commands. The vc_sys_cmd_list must be released using free() when it is no longer required.

Parameters:

[out] vc_sys_cmd_list System command list handle

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The service state should be VC_SERVICE_STATE_READY.

See also:: vc_unset_command_list()

int vc_initialize ( void )

Initializes voice control.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: If the function succeeds, vc must be released with vc_deinitialize().

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_OUT_OF_MEMORY	Out of memory
VC_ERROR_OPERATION_FAILED	Operation failure
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Postcondition:: If this function is called, the state will be VC_STATE_INITIALIZED.

See also:: vc_deinitialize()

int vc_prepare ( void )

Connects the voice control service.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_OPERATION_FAILED	Operation failure
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

Postcondition:: If this function is called, the state will be VC_STATE_READY.

See also:: vc_unprepare()

int vc_request_dialog	(	const char *	disp_text,
		const char *	utt_text,
		bool	auto_start
	)

Requests to start the dialogue.

Using this function, the developer can request starting the dialogue to the framework. When the developer requests the dialogue, two types of texts, disp_text and utt_text, can be sent by this function. disp_text is a text for displaying, and utt_text is that for uttering. For example, if disp_text is "October 10th" and utt_text 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 auto_start. If the developer sets auto_start as true, the framework will start to record next speech and continue the dialogue.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: If auto_start is true, the recognition will start again. In this case, it can be restarted up to 4 times.

Parameters:

[in]	disp_text	Text to be displayed on the screen
[in]	utt_text	Text to be spoken
[in]	auto_start	A variable for setting whether the dialog session will be restarted automatically or not

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The service state should be VC_SERVICE_STATE_READY.

int vc_set_command_list	(	vc_cmd_list_h	vc_cmd_list,
		int	type
	)

Sets command list.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: The command type is valid for VC_COMMAND_TYPE_FOREGROUND or VC_COMMAND_TYPE_BACKGROUND. The matched commands of command list should be set and they should include type and command text at least.

Parameters:

[in]	vc_cmd_list	Command list handle
[in]	type	Command type

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

See also:: vc_unset_command_list()

int vc_set_current_language_changed_cb	(	vc_current_language_changed_cb	callback,
		void *	user_data
	)

Registers a callback function to be called when current language is changed.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_current_language_changed_cb(); vc_unset_current_language_changed_cb()

int vc_set_error_cb	(	vc_error_cb	callback,
		void *	user_data
	)

Registers a callback function to be called when an error occurred.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_error_cb(); vc_unset_error_cb()

int vc_set_invocation_name ( const char * name )

Sets the invocation name.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Remarks:: Invocation name is used to activate background commands. The invocation name can be the 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 vc_set_command_list().

Parameters:

[in] name Invocation name that an application wants to be invoked by

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

See also:: vc_set_command_list()

int vc_set_result_cb	(	vc_result_cb	callback,
		void *	user_data
	)

Registers a callback function for getting recognition result.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_result_cb(); vc_unset_result_cb()

int vc_set_service_state_changed_cb	(	vc_service_state_changed_cb	callback,
		void *	user_data
	)

Registers a callback function to be called when state is changed.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_service_state_changed_cb(); vc_unset_service_state_changed_cb()

int vc_set_state_changed_cb	(	vc_state_changed_cb	callback,
		void *	user_data
	)

Registers a callback function to be called when state is changed.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in]	callback	Callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_state_changed_cb(); vc_unset_state_changed_cb()

int vc_unprepare ( void )

Disconnects the voice control service.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

Postcondition:: If this function is called, the state will be VC_STATE_INITIALIZED.

See also:: vc_prepare()

int vc_unset_command_list ( int type )

Unsets command list.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Parameters:

[in] type Command type

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_PARAMETER	Invalid parameter
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_READY.

See also:: vc_set_command_list()

int vc_unset_current_language_changed_cb ( void )

Unregisters the callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_set_current_language_changed_cb()

int vc_unset_error_cb ( void )

Unregisters the callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_set_error_cb()

int vc_unset_result_cb ( void )

Unregisters the callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_set_result_cb()

int vc_unset_service_state_changed_cb ( void )

Unregisters the callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_set_service_state_changed_cb()

int vc_unset_state_changed_cb ( void )

Unregisters the callback function.

Since :: 3.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/recorder

Returns:: 0 on success, otherwise a negative error value

Return values:

VC_ERROR_NONE	Successful
VC_ERROR_INVALID_STATE	Invalid state
VC_ERROR_PERMISSION_DENIED	Permission denied
VC_ERROR_NOT_SUPPORTED	Not supported

Precondition:: The state should be VC_STATE_INITIALIZED.

See also:: vc_set_state_changed_cb()

Required Header

Overview

State Diagram

State Transitions

State Dependent Function Calls

Related Features

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