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|
/******************************************************************************
*
* Copyright (C) 2002-2012 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 module contains the channel control block state machine and
* functions which operate on the channel control block.
*
******************************************************************************/
#include <string.h>
#include "data_types.h"
#include "bt_target.h"
#include "avdt_api.h"
#include "avdtc_api.h"
#include "avdt_int.h"
#include "gki.h"
#include "btu.h"
/*****************************************************************************
** state machine constants and types
*****************************************************************************/
#if AVDT_DEBUG == TRUE
/* verbose state strings for trace */
const char * const avdt_ccb_st_str[] = {
"CCB_IDLE_ST",
"CCB_OPENING_ST",
"CCB_OPEN_ST",
"CCB_CLOSING_ST"
};
/* verbose event strings for trace */
const char * const avdt_ccb_evt_str[] = {
"API_DISCOVER_REQ_EVT",
"API_GETCAP_REQ_EVT",
"API_START_REQ_EVT",
"API_SUSPEND_REQ_EVT",
"API_DISCOVER_RSP_EVT",
"API_GETCAP_RSP_EVT",
"API_START_RSP_EVT",
"API_SUSPEND_RSP_EVT",
"API_CONNECT_REQ_EVT",
"API_DISCONNECT_REQ_EVT",
"MSG_DISCOVER_CMD_EVT",
"MSG_GETCAP_CMD_EVT",
"MSG_START_CMD_EVT",
"MSG_SUSPEND_CMD_EVT",
"MSG_DISCOVER_RSP_EVT",
"MSG_GETCAP_RSP_EVT",
"MSG_START_RSP_EVT",
"MSG_SUSPEND_RSP_EVT",
"RCVRSP_EVT",
"SENDMSG_EVT",
"RET_TOUT_EVT",
"RSP_TOUT_EVT",
"IDLE_TOUT_EVT",
"UL_OPEN_EVT",
"UL_CLOSE_EVT",
"LL_OPEN_EVT",
"LL_CLOSE_EVT",
"LL_CONG_EVT"
};
#endif
/* action function list */
const tAVDT_CCB_ACTION avdt_ccb_action[] = {
avdt_ccb_chan_open,
avdt_ccb_chan_close,
avdt_ccb_chk_close,
avdt_ccb_hdl_discover_cmd,
avdt_ccb_hdl_discover_rsp,
avdt_ccb_hdl_getcap_cmd,
avdt_ccb_hdl_getcap_rsp,
avdt_ccb_hdl_start_cmd,
avdt_ccb_hdl_start_rsp,
avdt_ccb_hdl_suspend_cmd,
avdt_ccb_hdl_suspend_rsp,
avdt_ccb_snd_discover_cmd,
avdt_ccb_snd_discover_rsp,
avdt_ccb_snd_getcap_cmd,
avdt_ccb_snd_getcap_rsp,
avdt_ccb_snd_start_cmd,
avdt_ccb_snd_start_rsp,
avdt_ccb_snd_suspend_cmd,
avdt_ccb_snd_suspend_rsp,
avdt_ccb_clear_cmds,
avdt_ccb_cmd_fail,
avdt_ccb_free_cmd,
avdt_ccb_cong_state,
avdt_ccb_ret_cmd,
avdt_ccb_snd_cmd,
avdt_ccb_snd_msg,
avdt_ccb_set_reconn,
avdt_ccb_clr_reconn,
avdt_ccb_chk_reconn,
avdt_ccb_chk_timer,
avdt_ccb_set_conn,
avdt_ccb_set_disconn,
avdt_ccb_do_disconn,
avdt_ccb_ll_closed,
avdt_ccb_ll_opened,
avdt_ccb_dealloc
};
/* state table information */
#define AVDT_CCB_ACTIONS 2 /* number of actions */
#define AVDT_CCB_NEXT_STATE 2 /* position of next state */
#define AVDT_CCB_NUM_COLS 3 /* number of columns in state tables */
/* state table for idle state */
const UINT8 avdt_ccb_st_idle[][AVDT_CCB_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */ {AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_GETCAP_REQ_EVT */ {AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_START_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_SUSPEND_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_DISCOVER_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_GETCAP_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_START_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_SUSPEND_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* API_CONNECT_REQ_EVT */ {AVDT_CCB_SET_CONN, AVDT_CCB_CHAN_OPEN, AVDT_CCB_OPENING_ST},
/* API_DISCONNECT_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_DISCOVER_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_GETCAP_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_START_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_SUSPEND_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_DISCOVER_RSP_EVT */ {AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_GETCAP_RSP_EVT */ {AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_START_RSP_EVT */ {AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* MSG_SUSPEND_RSP_EVT */ {AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RCVRSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* SENDMSG_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RET_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* RSP_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* IDLE_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* UL_OPEN_EVT */ {AVDT_CCB_CHAN_OPEN, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_CLOSE_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_OPEN_EVT */ {AVDT_CCB_LL_OPENED, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */ {AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST}
};
/* state table for opening state */
const UINT8 avdt_ccb_st_opening[][AVDT_CCB_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */ {AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_GETCAP_REQ_EVT */ {AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_START_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_SUSPEND_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_DISCOVER_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_GETCAP_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_START_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_SUSPEND_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_CONNECT_REQ_EVT */ {AVDT_CCB_SET_CONN, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* API_DISCONNECT_REQ_EVT */ {AVDT_CCB_SET_DISCONN, AVDT_CCB_DO_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_GETCAP_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_START_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_SUSPEND_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_DISCOVER_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_GETCAP_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_START_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* MSG_SUSPEND_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RCVRSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* SENDMSG_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RET_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* RSP_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* IDLE_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_OPEN_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST},
/* UL_CLOSE_EVT */ {AVDT_CCB_CLEAR_CMDS, AVDT_CCB_CHAN_CLOSE, AVDT_CCB_CLOSING_ST},
/* LL_OPEN_EVT */ {AVDT_CCB_SND_CMD, AVDT_CCB_LL_OPENED, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */ {AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */ {AVDT_CCB_CONG_STATE, AVDT_CCB_IGNORE, AVDT_CCB_OPENING_ST}
};
/* state table for open state */
const UINT8 avdt_ccb_st_open[][AVDT_CCB_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */ {AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_GETCAP_REQ_EVT */ {AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_START_REQ_EVT */ {AVDT_CCB_SND_START_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_SUSPEND_REQ_EVT */ {AVDT_CCB_SND_SUSPEND_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_DISCOVER_RSP_EVT */ {AVDT_CCB_SND_DISCOVER_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_GETCAP_RSP_EVT */ {AVDT_CCB_SND_GETCAP_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_START_RSP_EVT */ {AVDT_CCB_SND_START_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_SUSPEND_RSP_EVT */ {AVDT_CCB_SND_SUSPEND_RSP, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* API_CONNECT_REQ_EVT */ {AVDT_CCB_SET_CONN, AVDT_CCB_LL_OPENED, AVDT_CCB_OPEN_ST},
/* API_DISCONNECT_REQ_EVT */ {AVDT_CCB_SET_DISCONN, AVDT_CCB_DO_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */ {AVDT_CCB_HDL_DISCOVER_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_GETCAP_CMD_EVT */ {AVDT_CCB_HDL_GETCAP_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_START_CMD_EVT */ {AVDT_CCB_HDL_START_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_SUSPEND_CMD_EVT */ {AVDT_CCB_HDL_SUSPEND_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_DISCOVER_RSP_EVT */ {AVDT_CCB_CHK_CLOSE, AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_OPEN_ST},
/* MSG_GETCAP_RSP_EVT */ {AVDT_CCB_CHK_CLOSE, AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_OPEN_ST},
/* MSG_START_RSP_EVT */ {AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* MSG_SUSPEND_RSP_EVT */ {AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RCVRSP_EVT */ {AVDT_CCB_FREE_CMD, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* SENDMSG_EVT */ {AVDT_CCB_SND_MSG, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RET_TOUT_EVT */ {AVDT_CCB_RET_CMD, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* RSP_TOUT_EVT */ {AVDT_CCB_CMD_FAIL, AVDT_CCB_SND_CMD, AVDT_CCB_OPEN_ST},
/* IDLE_TOUT_EVT */ {AVDT_CCB_CLEAR_CMDS, AVDT_CCB_CHAN_CLOSE, AVDT_CCB_CLOSING_ST},
/* UL_OPEN_EVT */ {AVDT_CCB_CHK_TIMER, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* UL_CLOSE_EVT */ {AVDT_CCB_CHK_CLOSE, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_OPEN_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_OPEN_ST},
/* LL_CLOSE_EVT */ {AVDT_CCB_LL_CLOSED, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */ {AVDT_CCB_CONG_STATE, AVDT_CCB_SND_MSG, AVDT_CCB_OPEN_ST}
};
/* state table for closing state */
const UINT8 avdt_ccb_st_closing[][AVDT_CCB_NUM_COLS] = {
/* Event Action 1 Action 2 Next state */
/* API_DISCOVER_REQ_EVT */ {AVDT_CCB_SET_RECONN, AVDT_CCB_SND_DISCOVER_CMD, AVDT_CCB_CLOSING_ST},
/* API_GETCAP_REQ_EVT */ {AVDT_CCB_SET_RECONN, AVDT_CCB_SND_GETCAP_CMD, AVDT_CCB_CLOSING_ST},
/* API_START_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_SUSPEND_REQ_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_DISCOVER_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_GETCAP_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_START_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_SUSPEND_RSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* API_CONNECT_REQ_EVT */ {AVDT_CCB_SET_RECONN, AVDT_CCB_SET_CONN, AVDT_CCB_CLOSING_ST},
/* API_DISCONNECT_REQ_EVT */ {AVDT_CCB_CLR_RECONN, AVDT_CCB_SET_DISCONN, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_GETCAP_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_START_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_SUSPEND_CMD_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_DISCOVER_RSP_EVT */ {AVDT_CCB_HDL_DISCOVER_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_GETCAP_RSP_EVT */ {AVDT_CCB_HDL_GETCAP_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_START_RSP_EVT */ {AVDT_CCB_HDL_START_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* MSG_SUSPEND_RSP_EVT */ {AVDT_CCB_HDL_SUSPEND_RSP, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RCVRSP_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* SENDMSG_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RET_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* RSP_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* IDLE_TOUT_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* UL_OPEN_EVT */ {AVDT_CCB_SET_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* UL_CLOSE_EVT */ {AVDT_CCB_CLR_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* LL_OPEN_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST},
/* LL_CLOSE_EVT */ {AVDT_CCB_CHK_RECONN, AVDT_CCB_IGNORE, AVDT_CCB_IDLE_ST},
/* LL_CONG_EVT */ {AVDT_CCB_IGNORE, AVDT_CCB_IGNORE, AVDT_CCB_CLOSING_ST}
};
/* type for state table */
typedef const UINT8 (*tAVDT_CCB_ST_TBL)[AVDT_CCB_NUM_COLS];
/* state table */
const tAVDT_CCB_ST_TBL avdt_ccb_st_tbl[] = {
avdt_ccb_st_idle,
avdt_ccb_st_opening,
avdt_ccb_st_open,
avdt_ccb_st_closing
};
/*******************************************************************************
**
** Function avdt_ccb_init
**
** Description Initialize channel control block module.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ccb_init(void)
{
memset(&avdt_cb.ccb[0], 0, sizeof(tAVDT_CCB) * AVDT_NUM_LINKS);
avdt_cb.p_ccb_act = (tAVDT_CCB_ACTION *) avdt_ccb_action;
}
/*******************************************************************************
**
** Function avdt_ccb_event
**
** Description State machine event handling function for ccb
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ccb_event(tAVDT_CCB *p_ccb, UINT8 event, tAVDT_CCB_EVT *p_data)
{
tAVDT_CCB_ST_TBL state_table;
UINT8 action;
int i;
#if AVDT_DEBUG == TRUE
AVDT_TRACE_EVENT3("CCB ccb=%d event=%s state=%s", avdt_ccb_to_idx(p_ccb), avdt_ccb_evt_str[event], avdt_ccb_st_str[p_ccb->state]);
#endif
BTTRC_AVDT_CCB_EVENT(event, p_ccb->state);
/* look up the state table for the current state */
state_table = avdt_ccb_st_tbl[p_ccb->state];
/* set next state */
if (p_ccb->state != state_table[event][AVDT_CCB_NEXT_STATE])
BTTRC_AVDT_CCB_STATE(state_table[event][AVDT_CCB_NEXT_STATE]);
p_ccb->state = state_table[event][AVDT_CCB_NEXT_STATE];
/* execute action functions */
for (i = 0; i < AVDT_CCB_ACTIONS; i++)
{
if ((action = state_table[event][i]) != AVDT_CCB_IGNORE)
{
BTTRC_AVDT_CCB_ACTION(action);
(*avdt_cb.p_ccb_act[action])(p_ccb, p_data);
}
else
{
break;
}
}
}
/*******************************************************************************
**
** Function avdt_ccb_by_bd
**
** Description This lookup function finds the ccb for a BD address.
**
**
** Returns pointer to the ccb, or NULL if none found.
**
*******************************************************************************/
tAVDT_CCB *avdt_ccb_by_bd(BD_ADDR bd_addr)
{
tAVDT_CCB *p_ccb = &avdt_cb.ccb[0];
int i;
for (i = 0; i < AVDT_NUM_LINKS; i++, p_ccb++)
{
/* if allocated ccb has matching ccb */
if (p_ccb->allocated && (!memcmp(p_ccb->peer_addr, bd_addr, BD_ADDR_LEN)))
{
break;
}
}
if (i == AVDT_NUM_LINKS)
{
/* if no ccb found */
p_ccb = NULL;
AVDT_TRACE_DEBUG6("No ccb for addr %02x-%02x-%02x-%02x-%02x-%02x",
bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);
}
return p_ccb;
}
/*******************************************************************************
**
** Function avdt_ccb_alloc
**
** Description Allocate a channel control block.
**
**
** Returns pointer to the ccb, or NULL if none could be allocated.
**
*******************************************************************************/
tAVDT_CCB *avdt_ccb_alloc(BD_ADDR bd_addr)
{
tAVDT_CCB *p_ccb = &avdt_cb.ccb[0];
int i;
for (i = 0; i < AVDT_NUM_LINKS; i++, p_ccb++)
{
if (!p_ccb->allocated)
{
p_ccb->allocated = TRUE;
memcpy(p_ccb->peer_addr, bd_addr, BD_ADDR_LEN);
GKI_init_q(&p_ccb->cmd_q);
GKI_init_q(&p_ccb->rsp_q);
p_ccb->timer_entry.param = (UINT32) p_ccb;
AVDT_TRACE_DEBUG1("avdt_ccb_alloc %d", i);
break;
}
}
if (i == AVDT_NUM_LINKS)
{
/* out of ccbs */
p_ccb = NULL;
AVDT_TRACE_WARNING0("Out of ccbs");
}
return p_ccb;
}
/*******************************************************************************
**
** Function avdt_ccb_dealloc
**
** Description Deallocate a stream control block.
**
**
** Returns void.
**
*******************************************************************************/
void avdt_ccb_dealloc(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
AVDT_TRACE_DEBUG1("avdt_ccb_dealloc %d", avdt_ccb_to_idx(p_ccb));
btu_stop_timer(&p_ccb->timer_entry);
memset(p_ccb, 0, sizeof(tAVDT_CCB));
}
/*******************************************************************************
**
** Function avdt_ccb_to_idx
**
** Description Given a pointer to an ccb, return its index.
**
**
** Returns Index of ccb.
**
*******************************************************************************/
UINT8 avdt_ccb_to_idx(tAVDT_CCB *p_ccb)
{
/* use array arithmetic to determine index */
return (UINT8) (p_ccb - avdt_cb.ccb);
}
/*******************************************************************************
**
** Function avdt_ccb_by_idx
**
** Description Return ccb pointer based on ccb index.
**
**
** Returns pointer to the ccb, or NULL if none found.
**
*******************************************************************************/
tAVDT_CCB *avdt_ccb_by_idx(UINT8 idx)
{
tAVDT_CCB *p_ccb;
/* verify index */
if (idx < AVDT_NUM_LINKS)
{
p_ccb = &avdt_cb.ccb[idx];
}
else
{
p_ccb = NULL;
AVDT_TRACE_WARNING1("No ccb for idx %d", idx);
}
return p_ccb;
}
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