Tizen Native API  6.0
Voice control

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.

capi_uix_voice_control_state_diagram.png
<State diagram>

The following diagram shows the states of Voice Control service.

capi_uix_voice_control_service_state_diagram.png
<Service state diagram>

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_set_server_dialog() 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.

Copyright (c) 2011-2016 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.

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_set_server_dialog (const char *app_id, const char *credential)
 Requests to set app id which is to want to ask the server dialogue.
int vc_unset_server_dialog (const char *app_id)
 Requests to unset app id which is to not want to ask the server dialogue.
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.
int vc_tts_request (const char *text, const char *language, bool to_vc_manager, int *utt_id)
 Requests to send TTS streaming data, asynchronously.
int vc_tts_cancel (int utt_id)
 Requests to cancel TTS streaming data.
int vc_tts_get_synthesized_audio_details (int *rate, vc_audio_channel_e *channel, vc_audio_type_e *audio_type)
 Gets the TTS audio details.
int vc_tts_set_streaming_cb (vc_tts_streaming_cb callback, void *user_data)
 Sets the TTS streaming callback function.
int vc_tts_unset_streaming_cb (void)
 Unsets the TTS streaming callback function.
int vc_tts_set_utterance_status_cb (vc_tts_utterance_status_cb callback, void *user_data)
 Sets the TTS utterance status callback function.
int vc_tts_unset_utterance_status_cb (void)
 Unsets the TTS utterance status 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.
typedef void(* vc_tts_streaming_cb )(vc_tts_event_e event, char *buffer, int len, int utt_id, void *user_data)
 Called when the client receives TTS streaming data from the VC engine service.
typedef void(* vc_tts_utterance_status_cb )(int utt_id, vc_tts_utterance_status_e status, void *user_data)
 Called when the client receives the TTS utterance status.

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

Definition for background command type.

Since :
2.4

Definition for foreground command type.

Since :
2.4
#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 :
2.4
Parameters:
[in]previousPrevious language
[in]currentCurrent language
[in]user_dataThe 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 :
2.4
Parameters:
[in]reasonThe error type (e.g. VC_ERROR_OUT_OF_MEMORY, VC_ERROR_TIMED_OUT)
[in]user_dataThe 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 :
2.4
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]eventThe result event (e.g. VC_RESULT_EVENT_RESULT_SUCCESS, VC_RESULT_EVENT_REJECTED)
[in]vc_cmd_listThe recognized command list
[in]resultThe spoken text
[in]user_dataThe 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 :
2.4
Parameters:
[in]previousA previous state
[in]currentA current state
[in]user_dataThe 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 :
2.4
Parameters:
[in]previousA previous state
[in]currentA current state
[in]user_dataThe 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 :
2.4
Parameters:
[in]languageA 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_dataThe 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.
typedef void(* vc_tts_streaming_cb)(vc_tts_event_e event, char *buffer, int len, int utt_id, void *user_data)

Called when the client receives TTS streaming data from the VC engine service.

Since :
5.5
Remarks:
The buffer must be released with free() by you when you no longer need it.
Parameters:
[in]eventThe TTS event
[in]bufferThe TTS streaming data
[in]lenThe length of the TTS streaming data
[in]utt_idThe utterance id
[in]user_dataThe user data passed from the callback registration function
Precondition:
The application registers the callback function using vc_tts_set_streaming_cb().
See also:
vc_tts_set_streaming_cb()
typedef void(* vc_tts_utterance_status_cb)(int utt_id, vc_tts_utterance_status_e status, void *user_data)

Called when the client receives the TTS utterance status.

Since :
5.5
Parameters:
[in]utt_idThe utterance id
[in]statusThe new TTS utterance status (e.g. VC_TTS_UTTERANCE_STARTED, VC_TTS_UTTERANCE_COMPLETED, and so on)
[in]user_dataThe user data passed from the callback registration function
Precondition:
The application registers the callback function using vc_tts_set_utterance_status_cb().
See also:
vc_tts_set_utterance_status_cb()

Enumeration Type Documentation

Enumerations for audio channels.

Since :
5.0
Enumerator:
VC_AUDIO_CHANNEL_MONO 

1 channel, mono

VC_AUDIO_CHANNEL_STEREO 

2 channels, stereo

Enumerations of audio types.

Since :
5.0
Enumerator:
VC_AUDIO_TYPE_PCM_S16_LE 

Signed 16bit audio type, Little endian

VC_AUDIO_TYPE_PCM_U8 

Unsigned 8bit audio type

enum vc_error_e

Enumeration for error codes.

Since :
2.4
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)

Enumeration for TTS feedback events.

Since :
5.0
Enumerator:
VC_FEEDBACK_EVENT_FAIL 

Failed

VC_FEEDBACK_EVENT_START 

Start event

VC_FEEDBACK_EVENT_CONTINUE 

Continue event

VC_FEEDBACK_EVENT_FINISH 

Finish event

Enumeration for result event.

Since :
2.4
Enumerator:
VC_RESULT_EVENT_RESULT_SUCCESS 

Normal result

VC_RESULT_EVENT_REJECTED 

Rejected result

Enumeration for service state.

Since :
2.4
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 :
2.4
Enumerator:
VC_STATE_NONE 

'None' state

VC_STATE_INITIALIZED 

'Initialized' state

VC_STATE_READY 

'Ready' state

Enumeration for requested TTS events.

Since :
5.5
Enumerator:
VC_TTS_EVENT_FAIL 

Failed

VC_TTS_EVENT_START 

Start event

VC_TTS_EVENT_CONTINUE 

Continue event

VC_TTS_EVENT_FINISH 

Finish event

Enumeration for requested TTS utterance status events.

Since :
5.5
Enumerator:
VC_TTS_UTTERANCE_NONE 

None

VC_TTS_UTTERANCE_STARTED 

Utterance started

VC_TTS_UTTERANCE_COMPLETED 

Utterance completed

VC_TTS_UTTERANCE_CANCELED 

Utterance canceled


Function Documentation

int vc_deinitialize ( void  )

Deinitializes voice control.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_OPERATION_FAILEDOperation failure
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
See also:
vc_initialize()
int vc_foreach_supported_languages ( vc_supported_language_cb  callback,
void *  user_data 
)

Retrieves all supported languages using callback function.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to invoke
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_OPERATION_FAILEDOperation failure
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
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]languageA 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_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_OUT_OF_MEMORYOut of memory
VC_ERROR_OPERATION_FAILEDOperation failure
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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]callbackCallback function to get recognition result
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_READY.
See also:
vc_result_cb()

Gets current state of voice control service.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[out]stateThe current state
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_READY.
See also:
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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[out]stateThe current state
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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_listSystem command list handle
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
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_NONESuccessful
VC_ERROR_OUT_OF_MEMORYOut of memory
VC_ERROR_OPERATION_FAILEDOperation failure
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_OPERATION_FAILEDOperation failure
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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_textText to be displayed on the screen
[in]utt_textText to be spoken
[in]auto_startA 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_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
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_listCommand list handle
[in]typeCommand type
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to register
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to register
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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]nameInvocation name that an application wants to be invoked by
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to register
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_INITIALIZED.
See also:
vc_result_cb()
vc_unset_result_cb()
int vc_set_server_dialog ( const char *  app_id,
const char *  credential 
)

Requests to set app id which is to want to ask the server dialogue.

Using this function, the developer can request registering the application on vc framework. If developer requests to register app_id with credential which is valid, the application will be set on vc framework. and then, when the developer requests the dialogue using vc_request_dialog(), dialog from specific engine server will be played by vc framework.

Since :
5.0
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]app_idApp id which is to want to ask server dialog.
[in]credentialCredential key.
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The service state should be VC_SERVICE_STATE_READY.
See also:
vc_unset_server_dialog()
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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to register
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]callbackCallback function to register
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_INITIALIZED.
See also:
vc_state_changed_cb()
vc_unset_state_changed_cb()
int vc_tts_cancel ( int  utt_id)

Requests to cancel TTS streaming data.

Warning:
This is not for use by third-party applications.
Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Parameters:
[in]utt_idThe utterance id
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
Precondition:
The state should be VC_STATE_READY.
See also:
vc_tts_request()
int vc_tts_get_synthesized_audio_details ( int *  rate,
vc_audio_channel_e channel,
vc_audio_type_e audio_type 
)

Gets the TTS audio details.

Warning:
This is not for use by third-party applications.

Using this function, the developer can get details of synthesized audio data which is requested by vc_tts_request() function.

Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Parameters:
[out]rateThe audio sampling rate
[out]channelThe audio channel
[out]audio_typeThe audio type
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
Precondition:
The state should be VC_STATE_READY.
int vc_tts_request ( const char *  text,
const char *  language,
bool  to_vc_manager,
int *  utt_id 
)

Requests to send TTS streaming data, asynchronously.

Warning:
This is not for use by third-party applications.

Using this function, the developer can request text to speech to the framework. When the developer requests the TTS with language, VC engine will send PCM data which is synthesized using VC engine's own persona. If to_vc_manager is true, the synthesized PCM data will be delivered to the VC manager, otherwise it will be delivered to the VC client For example, if text is "Alarm is set as 7 PM" and to_vc_manager is true, the PCM data corresponding "Alarm is set as 7 PM" will be delivered to VC manager client, and then it will be spoken in VC manager. If to_vc_manager is false, you will receive PCM data through the vc_tts_streaming_cb() callback function if it was set using vc_tts_set_streaming_cb(). This function is executed asynchronously, so if there is an error while synthesizing, vc_error_cb() will be called.

Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Parameters:
[in]textThe text to be requested for TTS
[in]languageThe 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]to_vc_managerThe value for selection between VC client and VC manager
If true, the synthesized PCM data will be delivered to the VC manager, otherwise it will be delivered to the VC client
[out]utt_idThe utterance id
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_OPERATION_FAILEDOperation failure
Precondition:
The state should be VC_STATE_READY.
See also:
vc_tts_cancel()
int vc_tts_set_streaming_cb ( vc_tts_streaming_cb  callback,
void *  user_data 
)

Sets the TTS streaming callback function.

Warning:
This is not for use by third-party applications.
Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Parameters:
[in]callbackThe callback function
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
Precondition:
The state should be VC_STATE_INITIALIZED.
int vc_tts_set_utterance_status_cb ( vc_tts_utterance_status_cb  callback,
void *  user_data 
)

Sets the TTS utterance status callback function.

Warning:
This is not for use by third-party applications.

Using this function, the developer can set the utterance status callback to be called when the VC manager client starts or stops playing TTS PCM data which was requested to be synthesized with the vc_tts_request() function. This function is called when to_vc_manager in the vc_tts_request() function call is true.

Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Parameters:
[in]callbackThe callback function
[in]user_dataThe user data to be passed to the callback function
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_OPERATION_FAILEDOperation failure
Precondition:
The state should be VC_STATE_INITIALIZED.
int vc_tts_unset_streaming_cb ( void  )

Unsets the TTS streaming callback function.

Warning:
This is not for use by third-party applications.
Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_STATEInvalid state
Precondition:
The state should be VC_STATE_INITIALIZED.

Unsets the TTS utterance status callback function.

Warning:
This is not for use by third-party applications.
Since :
5.5
Privilege Level:
partner
Privilege:
http://tizen.org/privilege/voicecontrol.tts
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_NOT_SUPPORTEDNot supported
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_INVALID_STATEInvalid state
Precondition:
The state should be VC_STATE_INITIALIZED.
int vc_unprepare ( void  )

Disconnects the voice control service.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]typeCommand type
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_READY.
See also:
vc_set_command_list()

Unregisters the callback function.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_INITIALIZED.
See also:
vc_set_result_cb()
int vc_unset_server_dialog ( const char *  app_id)

Requests to unset app id which is to not want to ask the server dialogue.

Using this function, the developer can disable function to ask dialog based on server.

Since :
5.0
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Parameters:
[in]app_idApp id which is to not want to ask server dialog.
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_PARAMETERInvalid parameter
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The service state should be VC_SERVICE_STATE_READY.
See also:
vc_set_server_dialog()

Unregisters the callback function.

Since :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot 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 :
2.4
Privilege Level:
public
Privilege:
http://tizen.org/privilege/recorder
Returns:
0 on success, otherwise a negative error value
Return values:
VC_ERROR_NONESuccessful
VC_ERROR_INVALID_STATEInvalid state
VC_ERROR_PERMISSION_DENIEDPermission denied
VC_ERROR_NOT_SUPPORTEDNot supported
Precondition:
The state should be VC_STATE_INITIALIZED.
See also:
vc_set_state_changed_cb()