/****************************************************************************** * * 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 "stack/bt_types.h" #include "common/bt_target.h" #include "common/bt_defs.h" #include "stack/avdt_api.h" #include "stack/avdtc_api.h" #include "avdt_int.h" #include "stack/btu.h" #if (defined(AVDT_INCLUDED) && AVDT_INCLUDED == TRUE) /***************************************************************************** ** 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_EVENT("CCB ccb=%d event=%s state=%s\n", avdt_ccb_to_idx(p_ccb), avdt_ccb_evt_str[event], avdt_ccb_st_str[p_ccb->state]); #endif /* 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]) { 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) { (*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_DEBUG("No ccb for addr %02x-%02x-%02x-%02x-%02x-%02x\n", 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); p_ccb->cmd_q = fixed_queue_new(QUEUE_SIZE_MAX); p_ccb->rsp_q = fixed_queue_new(QUEUE_SIZE_MAX); p_ccb->timer_entry.param = (UINT32) p_ccb; AVDT_TRACE_DEBUG("avdt_ccb_alloc %d\n", i); break; } } if (i == AVDT_NUM_LINKS) { /* out of ccbs */ p_ccb = NULL; AVDT_TRACE_WARNING("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) { UNUSED(p_data); AVDT_TRACE_DEBUG("avdt_ccb_dealloc %d\n", avdt_ccb_to_idx(p_ccb)); btu_free_timer(&p_ccb->timer_entry); fixed_queue_free(p_ccb->cmd_q, NULL); fixed_queue_free(p_ccb->rsp_q, NULL); 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_WARNING("No ccb for idx %d\n", idx); } return p_ccb; } #endif /* #if (defined(AVDT_INCLUDED) && AVDT_INCLUDED == TRUE) */