/******************************************************************************
 *
 *  Copyright (C) 2003-2012 Broadcom Corporation
 *
 *  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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This is the interface file for audio gateway call-out functions.
 *
 ******************************************************************************/
#ifndef BTA_AG_CO_H
#define BTA_AG_CO_H

#include "bta_ag_api.h"

/* Definitions for audio state callout function "state" parameter */
#define BTA_AG_CO_AUD_STATE_OFF         0
#define BTA_AG_CO_AUD_STATE_OFF_XFER    1   /* Closed pending transfer of audio */
#define BTA_AG_CO_AUD_STATE_ON          2
#define BTA_AG_CO_AUD_STATE_SETUP       3

/*******************************************************************************
**
** Function         bta_ag_co_init
**
** Description      This callout function is executed by AG when it is
**                  started by calling BTA_AgEnable().  This function can be
**                  used by the phone to initialize audio paths or for other
**                  initialization purposes.
**
**
** Returns          Void.
**
*******************************************************************************/
BTA_API extern void bta_ag_co_init(void);

/*******************************************************************************
**
** Function         bta_ag_co_audio_state
**
** Description      This function is called by the AG before the audio connection
**                  is brought up, after it comes up, and after it goes down.
**
** Parameters       handle - handle of the AG instance
**                  state - Audio state
**                      BTA_AG_CO_AUD_STATE_OFF      - Audio has been turned off
**                      BTA_AG_CO_AUD_STATE_OFF_XFER - Audio is closed pending transfer
**                      BTA_AG_CO_AUD_STATE_ON       - Audio has been turned on
**                      BTA_AG_CO_AUD_STATE_SETUP    - Audio is about to be turned on
**
** Returns          void
**
*******************************************************************************/
BTA_API extern void bta_ag_co_audio_state(UINT16 handle, UINT8 app_id, UINT8 state);

/*******************************************************************************
**
** Function         bta_ag_co_data_open
**
** Description      This function is executed by AG when a service level connection
**                  is opened.  The phone can use this function to set
**                  up data paths or perform any required initialization or
**                  set up particular to the connected service.
**
**
** Returns          void
**
*******************************************************************************/
BTA_API extern void bta_ag_co_data_open(UINT16 handle, tBTA_SERVICE_ID service);

/*******************************************************************************
**
** Function         bta_ag_co_data_close
**
** Description      This function is called by AG when a service level
**                  connection is closed
**
**
** Returns          void
**
*******************************************************************************/
BTA_API extern void bta_ag_co_data_close(UINT16 handle);

/*******************************************************************************
**
** Function         bta_ag_co_tx_write
**
** Description      This function is called by the AG to send data to the
**                  phone when the AG is configured for AT command pass-through.
**                  The implementation of this function must copy the data to
**                  the phone’s memory.
**
** Returns          void
**
*******************************************************************************/
BTA_API extern void bta_ag_co_tx_write(UINT16 handle, UINT8 *p_data, UINT16 len);

#endif /* BTA_AG_CO_H */