bta/av/bta_av_main.cc

/******************************************************************************
 *
 *  Copyright (C) 2004-2012 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 main implementation file for the BTA advanced audio/video.
 *
 ******************************************************************************/

#define LOG_TAG "bt_bta_av"

#include <assert.h>
#include <string.h>

#include "bt_target.h"
#include "osi/include/log.h"

#include "bta_av_co.h"
#include "bta_av_int.h"
#include "btif/include/btif_av_co.h"
#include "l2c_api.h"
#include "l2cdefs.h"
#include "utl.h"

#if (BTA_AR_INCLUDED == TRUE)
#include "bta_ar_api.h"
#endif

/*****************************************************************************
** Constants and types
*****************************************************************************/

#ifndef BTA_AV_RET_TOUT
#define BTA_AV_RET_TOUT     4
#endif

#ifndef BTA_AV_SIG_TOUT
#define BTA_AV_SIG_TOUT     4
#endif

#ifndef BTA_AV_IDLE_TOUT
#define BTA_AV_IDLE_TOUT    10
#endif

/* the delay time in milliseconds to retry role switch */
#ifndef BTA_AV_RS_TIME_VAL
#define BTA_AV_RS_TIME_VAL     1000
#endif

/* state machine states */
enum
{
    BTA_AV_INIT_ST,
    BTA_AV_OPEN_ST
};

/* state machine action enumeration list */
enum
{
    BTA_AV_DISABLE,
    BTA_AV_RC_OPENED,
    BTA_AV_RC_REMOTE_CMD,
    BTA_AV_RC_VENDOR_CMD,
    BTA_AV_RC_VENDOR_RSP,
    BTA_AV_RC_FREE_RSP,
    BTA_AV_RC_FREE_BROWSE_MSG,
    BTA_AV_RC_META_RSP,
    BTA_AV_RC_MSG,
    BTA_AV_RC_CLOSE,
    BTA_AV_RC_BROWSE_CLOSE,
    BTA_AV_NUM_ACTIONS
};

#define BTA_AV_IGNORE       BTA_AV_NUM_ACTIONS

/* type for action functions */
typedef void (*tBTA_AV_ACTION)(tBTA_AV_CB *p_cb, tBTA_AV_DATA *p_data);

/* action functions */
const tBTA_AV_ACTION bta_av_action[] =
{
    bta_av_disable,
    bta_av_rc_opened,
    bta_av_rc_remote_cmd,
    bta_av_rc_vendor_cmd,
    bta_av_rc_vendor_rsp,
    bta_av_rc_free_rsp,
    bta_av_rc_free_browse_msg,
    bta_av_rc_meta_rsp,
    bta_av_rc_msg,
    bta_av_rc_close,
};

/* state table information */
#define BTA_AV_ACTION_COL           0       /* position of actions */
#define BTA_AV_NEXT_STATE           1       /* position of next state */
#define BTA_AV_NUM_COLS             2       /* number of columns in state tables */

/* state table for init state */
static const uint8_t bta_av_st_init[][BTA_AV_NUM_COLS] =
{
/* Event                     Action 1                   Next state */
/* API_DISABLE_EVT */       {BTA_AV_DISABLE,            BTA_AV_INIT_ST },
/* API_REMOTE_CMD_EVT */    {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
/* API_VENDOR_CMD_EVT */    {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
/* API_VENDOR_RSP_EVT */    {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
/* API_META_RSP_EVT */      {BTA_AV_RC_FREE_RSP,        BTA_AV_INIT_ST },
/* API_RC_CLOSE_EVT */      {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
/* AVRC_OPEN_EVT */         {BTA_AV_RC_OPENED,          BTA_AV_OPEN_ST },
/* AVRC_MSG_EVT */          {BTA_AV_RC_FREE_BROWSE_MSG, BTA_AV_INIT_ST },
/* AVRC_NONE_EVT */         {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
};

/* state table for open state */
static const uint8_t bta_av_st_open[][BTA_AV_NUM_COLS] =
{
/* Event                     Action 1                   Next state */
/* API_DISABLE_EVT */       {BTA_AV_DISABLE,            BTA_AV_INIT_ST },
/* API_REMOTE_CMD_EVT */    {BTA_AV_RC_REMOTE_CMD,      BTA_AV_OPEN_ST },
/* API_VENDOR_CMD_EVT */    {BTA_AV_RC_VENDOR_CMD,      BTA_AV_OPEN_ST },
/* API_VENDOR_RSP_EVT */    {BTA_AV_RC_VENDOR_RSP,      BTA_AV_OPEN_ST },
/* API_META_RSP_EVT */      {BTA_AV_RC_META_RSP,        BTA_AV_OPEN_ST },
/* API_RC_CLOSE_EVT */      {BTA_AV_RC_CLOSE,           BTA_AV_OPEN_ST },
/* AVRC_OPEN_EVT */         {BTA_AV_RC_OPENED,          BTA_AV_OPEN_ST },
/* AVRC_MSG_EVT */          {BTA_AV_RC_MSG,             BTA_AV_OPEN_ST },
/* AVRC_NONE_EVT */         {BTA_AV_IGNORE,             BTA_AV_INIT_ST },
};

/* type for state table */
typedef const uint8_t (*tBTA_AV_ST_TBL)[BTA_AV_NUM_COLS];

/* state table */
static const tBTA_AV_ST_TBL bta_av_st_tbl[] =
{
    bta_av_st_init,
    bta_av_st_open
};

typedef void (*tBTA_AV_NSM_ACT)(tBTA_AV_DATA *p_data);
static void bta_av_api_enable(tBTA_AV_DATA *p_data);
static void bta_av_api_register(tBTA_AV_DATA *p_data);
static void bta_av_ci_data(tBTA_AV_DATA *p_data);
#if (AVDT_REPORTING == TRUE)
static void bta_av_rpc_conn(tBTA_AV_DATA *p_data);
#endif
static void bta_av_api_to_ssm(tBTA_AV_DATA *p_data);

static void bta_av_sco_chg_cback(tBTA_SYS_CONN_STATUS status, uint8_t id,
                                 uint8_t app_id, BD_ADDR peer_addr);
static void bta_av_sys_rs_cback (tBTA_SYS_CONN_STATUS status,uint8_t id,
                                 uint8_t app_id, BD_ADDR peer_addr);

/* action functions */
const tBTA_AV_NSM_ACT bta_av_nsm_act[] =
{
    bta_av_api_enable,      /* BTA_AV_API_ENABLE_EVT */
    bta_av_api_register,    /* BTA_AV_API_REGISTER_EVT */
    bta_av_api_deregister,  /* BTA_AV_API_DEREGISTER_EVT */
    bta_av_api_disconnect,  /* BTA_AV_API_DISCONNECT_EVT */
    bta_av_ci_data,         /* BTA_AV_CI_SRC_DATA_READY_EVT */
    bta_av_sig_chg,         /* BTA_AV_SIG_CHG_EVT */
    bta_av_signalling_timer, /* BTA_AV_SIGNALLING_TIMER_EVT */
    bta_av_rc_disc_done,    /* BTA_AV_SDP_AVRC_DISC_EVT */
    bta_av_rc_closed,       /* BTA_AV_AVRC_CLOSE_EVT */
    bta_av_rc_browse_opened,/* BTA_AV_AVRC_BROWSE_OPEN_EVT */
    bta_av_rc_browse_closed,/* BTA_AV_AVRC_BROWSE_CLOSE_EVT */
    bta_av_conn_chg,        /* BTA_AV_CONN_CHG_EVT */
    bta_av_dereg_comp,      /* BTA_AV_DEREG_COMP_EVT */
#if (AVDT_REPORTING == TRUE)
    bta_av_rpc_conn,        /* BTA_AV_AVDT_RPT_CONN_EVT */
#endif
    bta_av_api_to_ssm,      /* BTA_AV_API_START_EVT */
    bta_av_api_to_ssm,      /* BTA_AV_API_STOP_EVT */
};

/*****************************************************************************
** Global data
*****************************************************************************/

/* AV control block */
tBTA_AV_CB  bta_av_cb;

#if (BTA_AV_DEBUG == TRUE)
static const char *bta_av_st_code(uint8_t state);
#endif

/*******************************************************************************
**
** Function         bta_av_api_enable
**
** Description      Handle an API enable event.
**
**
** Returns          void
**
*******************************************************************************/
static void bta_av_api_enable(tBTA_AV_DATA *p_data)
{
    /* initialize control block */
    memset(&bta_av_cb, 0, sizeof(tBTA_AV_CB));

    for (int i = 0; i < BTA_AV_NUM_RCB; i++)
        bta_av_cb.rcb[i].handle = BTA_AV_RC_HANDLE_NONE;

    bta_av_cb.rc_acp_handle = BTA_AV_RC_HANDLE_NONE;

    /*
     * TODO: The "disable" event handling is missing - there we need
     * to alarm_free() the alarms below.
     */
    bta_av_cb.link_signalling_timer = alarm_new("bta_av.link_signalling_timer");
    bta_av_cb.accept_signalling_timer =
        alarm_new("bta_av.accept_signalling_timer");

    /* store parameters */
    bta_av_cb.p_cback  = p_data->api_enable.p_cback;
    bta_av_cb.features = p_data->api_enable.features;
    bta_av_cb.sec_mask = p_data->api_enable.sec_mask;

    tBTA_AV_ENABLE enable;
    enable.features = bta_av_cb.features;

    /* Register for SCO change event */
    if (!(bta_av_cb.features & BTA_AV_FEAT_NO_SCO_SSPD))
    {
        bta_sys_sco_register(bta_av_sco_chg_cback);
    }

    /* call callback with enable event */
    (*bta_av_cb.p_cback)(BTA_AV_ENABLE_EVT, (tBTA_AV *)&enable);
}

/*******************************************************************************
**
** Function         bta_av_addr_to_scb
**
** Description      find the stream control block by the peer addr
**
** Returns          void
**
*******************************************************************************/
static tBTA_AV_SCB * bta_av_addr_to_scb(BD_ADDR bd_addr)
{
    tBTA_AV_SCB * p_scb = NULL;
    int         xx;

    for(xx=0; xx<BTA_AV_NUM_STRS; xx++)
    {
        if(bta_av_cb.p_scb[xx])
        {
            if(!bdcmp(bd_addr, bta_av_cb.p_scb[xx]->peer_addr))
            {
                p_scb = bta_av_cb.p_scb[xx];
                break;
            }
        }
    }
    return p_scb;
}

/*******************************************************************************
**
** Function         bta_av_hndl_to_scb
**
** Description      find the stream control block by the handle
**
** Returns          void
**
*******************************************************************************/
tBTA_AV_SCB * bta_av_hndl_to_scb(uint16_t handle)
{
    tBTA_AV_HNDL hndl = (tBTA_AV_HNDL)handle;
    tBTA_AV_SCB * p_scb = NULL;
    uint8_t idx = (hndl & BTA_AV_HNDL_MSK);

    if(idx && (idx <= BTA_AV_NUM_STRS) )
    {
        p_scb = bta_av_cb.p_scb[idx-1];
    }
    return p_scb;
}

/*******************************************************************************
**
** Function         bta_av_alloc_scb
**
** Description      allocate stream control block,
**                  register the service to stack
**                  create SDP record
**
** Returns          void
**
*******************************************************************************/
static tBTA_AV_SCB * bta_av_alloc_scb(tBTA_AV_CHNL chnl)
{
    tBTA_AV_SCB *p_ret = NULL;
    int         xx;
    tBTA_AV_STATUS sts = BTA_AV_SUCCESS;

    if(chnl == BTA_AV_CHNL_VIDEO)
    {
        if(p_bta_av_cfg->p_act_tbl == NULL || p_bta_av_cfg->p_reg == NULL)
        {
            APPL_TRACE_ERROR("Video streaming not supported");
            sts = BTA_AV_FAIL;
        }
        else
        {
            /* allow only one Video channel */
            if(bta_av_cb.reg_video)
            {
                APPL_TRACE_ERROR("Already registered");
                sts = BTA_AV_FAIL;
            }
        }
    }
    else if(chnl != BTA_AV_CHNL_AUDIO)
    {
        APPL_TRACE_ERROR("bad channel: %d", chnl);
        sts = BTA_AV_FAIL;
    }

    if(sts == BTA_AV_SUCCESS)
    {
        for(xx=0; xx<BTA_AV_NUM_STRS; xx++)
        {
            if(bta_av_cb.p_scb[xx] == NULL)
            {
                /* found an empty spot */
                p_ret = (tBTA_AV_SCB *)osi_calloc(sizeof(tBTA_AV_SCB));
                p_ret->rc_handle = BTA_AV_RC_HANDLE_NONE;
                p_ret->chnl = chnl;
                p_ret->hndl = (tBTA_AV_HNDL)((xx + 1) | chnl);
                p_ret->hdi  = xx;
                p_ret->a2dp_list = list_new(NULL);
                p_ret->avrc_ct_timer = alarm_new("bta_av.avrc_ct_timer");
                bta_av_cb.p_scb[xx] = p_ret;
                break;
            }
        }
    }
    return p_ret;
}

/*******************************************************************************
*******************************************************************************/
void bta_av_conn_cback(UNUSED_ATTR uint8_t handle, BD_ADDR bd_addr,
                       uint8_t event, tAVDT_CTRL *p_data)
{
    uint16_t  evt = 0;
    tBTA_AV_SCB *p_scb = NULL;

#if (BTA_AR_INCLUDED == TRUE)
    if (event == BTA_AR_AVDT_CONN_EVT ||
        event == AVDT_CONNECT_IND_EVT || event == AVDT_DISCONNECT_IND_EVT)
#else
    if (event == AVDT_CONNECT_IND_EVT || event == AVDT_DISCONNECT_IND_EVT)
#endif
    {
        evt = BTA_AV_SIG_CHG_EVT;
        if(AVDT_DISCONNECT_IND_EVT == event)
            p_scb = bta_av_addr_to_scb(bd_addr);
#if (BTA_AV_DEBUG == TRUE)
        else if (AVDT_CONNECT_IND_EVT == event)
        {
            APPL_TRACE_DEBUG("CONN_IND is ACP:%d", p_data->hdr.err_param);
        }
#endif

        tBTA_AV_STR_MSG *p_msg =
            (tBTA_AV_STR_MSG *)osi_malloc(sizeof(tBTA_AV_STR_MSG));
        p_msg->hdr.event = evt;
        p_msg->hdr.layer_specific = event;
        p_msg->hdr.offset = p_data->hdr.err_param;
        bdcpy(p_msg->bd_addr, bd_addr);
#if (BTA_AV_DEBUG == TRUE)
        if(p_scb) {
            APPL_TRACE_DEBUG("scb hndl x%x, role x%x", p_scb->hndl, p_scb->role);
        }
#endif
        APPL_TRACE_DEBUG("conn_cback bd_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]);
        bta_sys_sendmsg(p_msg);
    }
}

#if (AVDT_REPORTING == TRUE)
/*******************************************************************************
**
** Function         bta_av_a2dp_report_cback
**
** Description      A2DP report callback.
**
** Returns          void
**
*******************************************************************************/
static void bta_av_a2dp_report_cback(UNUSED_ATTR uint8_t handle, UNUSED_ATTR AVDT_REPORT_TYPE type,
                                    UNUSED_ATTR tAVDT_REPORT_DATA *p_data)
{
    /* Do not need to handle report data for now.
     * This empty function is here for conformance reasons. */
}
#endif

/*******************************************************************************
**
** Function         bta_av_api_register
**
** Description      allocate stream control block,
**                  register the service to stack
**                  create SDP record
**
** Returns          void
**
*******************************************************************************/
static void bta_av_api_register(tBTA_AV_DATA *p_data)
{
    tBTA_AV_REGISTER    registr;
    tBTA_AV_SCB         *p_scb;    /* stream control block */
    tAVDT_REG       reg;
    tAVDT_CS        cs;
    char            *p_service_name;
    tBTA_UTL_COD    cod;

    memset(&cs,0,sizeof(tAVDT_CS));

    registr.status = BTA_AV_FAIL_RESOURCES;
    registr.app_id = p_data->api_reg.app_id;
    registr.chnl   = (tBTA_AV_CHNL)p_data->hdr.layer_specific;

    uint16_t profile_initialized = p_data->api_reg.service_uuid;
    if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
    {
        p_bta_av_cfg  = (tBTA_AV_CFG *) &bta_avk_cfg;
    }
    else if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
    {
        p_bta_av_cfg  = (tBTA_AV_CFG *) &bta_av_cfg;
    }

    APPL_TRACE_DEBUG("%s: profile: 0x%x", __func__, profile_initialized);
    if (p_bta_av_cfg == NULL)
    {
        APPL_TRACE_ERROR("AV configuration is null!");
        return;
    }

    do
    {
        p_scb = bta_av_alloc_scb(registr.chnl);
        if (p_scb == NULL)
        {
            APPL_TRACE_ERROR("failed to alloc SCB");
            break;
        }

        registr.hndl    = p_scb->hndl;
        p_scb->app_id   = registr.app_id;

        /* initialize the stream control block */
        registr.status = BTA_AV_SUCCESS;

        if ((bta_av_cb.reg_audio + bta_av_cb.reg_video) == 0)
        {
            /* the first channel registered. register to AVDTP */
            reg.ctrl_mtu = p_bta_av_cfg->sig_mtu;
            reg.ret_tout = BTA_AV_RET_TOUT;
            reg.sig_tout = BTA_AV_SIG_TOUT;
            reg.idle_tout = BTA_AV_IDLE_TOUT;
            reg.sec_mask = bta_av_cb.sec_mask;
#if (BTA_AR_INCLUDED == TRUE)
            bta_ar_reg_avdt(&reg, bta_av_conn_cback, BTA_ID_AV);
#endif
            bta_sys_role_chg_register(&bta_av_sys_rs_cback);

            /* create remote control TG service if required */
            if (bta_av_cb.features & (BTA_AV_FEAT_RCTG))
            {
                /* register with no authorization; let AVDTP use authorization instead */
#if (BTA_AR_INCLUDED == TRUE)
#if (BTA_AV_WITH_AVCTP_AUTHORIZATION == TRUE)
                bta_ar_reg_avct(p_bta_av_cfg->avrc_mtu, p_bta_av_cfg->avrc_br_mtu,
                                bta_av_cb.sec_mask, BTA_ID_AV);
#else
                bta_ar_reg_avct(p_bta_av_cfg->avrc_mtu, p_bta_av_cfg->avrc_br_mtu,
                                (uint8_t)(bta_av_cb.sec_mask & (~BTA_SEC_AUTHORIZE)), BTA_ID_AV);
#endif

                /* Both Audio Source and Audio Sink support AVRCP 1.6 for the
                 * major roles (i.e. Audio Source -> TG 1.6 and vice versa). For
                 * Audio Sink role we support additional TG 1.3 to support
                 * absolute volume. Here we only do TG registration.
                 */
                uint16_t profile_version = AVRC_REV_1_0;
                if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
                {
                    profile_version = AVRC_REV_1_6;
                }
                else if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
                {
                    // Initialize AVRCP1.4 to provide Absolute Volume control.
                    profile_version = AVRC_REV_1_4;
                }
                bta_ar_reg_avrc(UUID_SERVCLASS_AV_REM_CTRL_TARGET, "AV Remote Control Target",
                               NULL, p_bta_av_cfg->avrc_tg_cat, BTA_ID_AV,
                               (bta_av_cb.features & BTA_AV_FEAT_BROWSE), profile_version);
#endif
            }

            /* Set the Capturing service class bit */
            if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
                cod.service = BTM_COD_SERVICE_CAPTURING;
            else if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
                cod.service = BTM_COD_SERVICE_RENDERING;
            utl_set_device_class(&cod, BTA_UTL_SET_COD_SERVICE_CLASS);
        } /* if 1st channel */

        /* get stream configuration and create stream */
        cs.cfg.num_codec = 1;
        cs.nsc_mask = AVDT_NSC_RECONFIG |
              ((bta_av_cb.features & BTA_AV_FEAT_PROTECT) ? 0 : AVDT_NSC_SECURITY);
        APPL_TRACE_DEBUG("nsc_mask: 0x%x", cs.nsc_mask);

        if (p_data->api_reg.p_service_name[0] == 0)
        {
            p_service_name = NULL;
        }
        else
        {
            p_service_name = p_data->api_reg.p_service_name;
        }

        p_scb->suspend_sup  = true;
        p_scb->recfg_sup    = true;
        p_scb->skip_sdp     = false;

        cs.p_ctrl_cback  = bta_av_dt_cback[p_scb->hdi];
        if(registr.chnl == BTA_AV_CHNL_AUDIO)
        {
            /* set up the audio stream control block */
            p_scb->p_act_tbl = (const tBTA_AV_ACT *)bta_av_a2dp_action;
            p_scb->p_cos     = &bta_av_a2dp_cos;
            p_scb->media_type= AVDT_MEDIA_TYPE_AUDIO;
            cs.cfg.psc_mask  = AVDT_PSC_TRANS;
            cs.media_type    = AVDT_MEDIA_TYPE_AUDIO;
            cs.mtu           = p_bta_av_cfg->audio_mtu;
            cs.flush_to      = L2CAP_DEFAULT_FLUSH_TO;
            tA2DP_CODEC_SEP_INDEX codec_sep_index_min =
                A2DP_CODEC_SEP_INDEX_SOURCE_MIN;
            tA2DP_CODEC_SEP_INDEX codec_sep_index_max =
                A2DP_CODEC_SEP_INDEX_SOURCE_MAX;

#if (AVDT_REPORTING == TRUE)
            if(bta_av_cb.features & BTA_AV_FEAT_REPORT)
            {
                cs.cfg.psc_mask |= AVDT_PSC_REPORT;
                cs.p_report_cback = bta_av_a2dp_report_cback;
            }
#endif
            if(bta_av_cb.features & BTA_AV_FEAT_DELAY_RPT)
                cs.cfg.psc_mask |= AVDT_PSC_DELAY_RPT;

            if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
            {
                cs.tsep = AVDT_TSEP_SRC;
                codec_sep_index_min = A2DP_CODEC_SEP_INDEX_SOURCE_MIN;
                codec_sep_index_max = A2DP_CODEC_SEP_INDEX_SOURCE_MAX;
            }
            else if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
            {
                cs.tsep = AVDT_TSEP_SNK;
                cs.p_sink_data_cback = bta_av_sink_data_cback;
                codec_sep_index_min = A2DP_CODEC_SEP_INDEX_SINK_MIN;
                codec_sep_index_max = A2DP_CODEC_SEP_INDEX_SINK_MAX;
            }

            /* Initialize handles to zero */
            for (int xx = 0; xx < A2DP_CODEC_SEP_INDEX_MAX; xx++)
            {
                p_scb->seps[xx].av_handle = 0;
            }

            /* keep the configuration in the stream control block */
            memcpy(&p_scb->cfg, &cs.cfg, sizeof(tAVDT_CFG));
            for (int i = 0; i < A2DP_CODEC_SEP_INDEX_MAX; i++) {
                tA2DP_CODEC_SEP_INDEX codec_sep_index =
                    static_cast<tA2DP_CODEC_SEP_INDEX>(i);
                if (!(*bta_av_a2dp_cos.init)(codec_sep_index, &cs.cfg)) {
                    continue;
                }
                if (AVDT_CreateStream(&p_scb->seps[codec_sep_index].av_handle,
                                      &cs) != AVDT_SUCCESS) {
                    continue;
                }
                /* Save a copy of the codec */
                memcpy(p_scb->seps[codec_sep_index].codec_info,
                       cs.cfg.codec_info, AVDT_CODEC_SIZE);
                p_scb->seps[codec_sep_index].tsep = cs.tsep;
                if (cs.tsep == AVDT_TSEP_SNK) {
                    p_scb->seps[codec_sep_index].p_app_sink_data_cback =
                        p_data->api_reg.p_app_sink_data_cback;
                } else {
                    /* In case of A2DP SOURCE we don't need a callback to
                     * handle media packets.
                     */
                    p_scb->seps[codec_sep_index].p_app_sink_data_cback = NULL;
                }
            }

            if(!bta_av_cb.reg_audio)
            {
                bta_av_cb.sdp_a2dp_handle = 0;
                bta_av_cb.sdp_a2dp_snk_handle = 0;
                if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
                {
                    /* create the SDP records on the 1st audio channel */
                    bta_av_cb.sdp_a2dp_handle = SDP_CreateRecord();
                    A2DP_AddRecord(UUID_SERVCLASS_AUDIO_SOURCE, p_service_name,
                                   NULL, A2DP_SUPF_PLAYER,
                                   bta_av_cb.sdp_a2dp_handle);
                    bta_sys_add_uuid(UUID_SERVCLASS_AUDIO_SOURCE);
                }
                else if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
                {
#if (BTA_AV_SINK_INCLUDED == TRUE)
                    bta_av_cb.sdp_a2dp_snk_handle = SDP_CreateRecord();
                    A2DP_AddRecord(UUID_SERVCLASS_AUDIO_SINK, p_service_name,
                                   NULL, A2DP_SUPF_PLAYER,
                                   bta_av_cb.sdp_a2dp_snk_handle);
                    bta_sys_add_uuid(UUID_SERVCLASS_AUDIO_SINK);
#endif
                }
                /* start listening when A2DP is registered */
                if (bta_av_cb.features & BTA_AV_FEAT_RCTG)
                    bta_av_rc_create(&bta_av_cb, AVCT_ACP, 0, BTA_AV_NUM_LINKS + 1);

                /* if the AV and AVK are both supported, it cannot support the CT role */
                if (bta_av_cb.features & (BTA_AV_FEAT_RCCT))
                {
                    /* if TG is not supported, we need to register to AVCT now */
                    if ((bta_av_cb.features & (BTA_AV_FEAT_RCTG)) == 0)
                    {
#if (BTA_AR_INCLUDED == TRUE)
#if (BTA_AV_WITH_AVCTP_AUTHORIZATION == TRUE)
                        bta_ar_reg_avct(p_bta_av_cfg->avrc_mtu, p_bta_av_cfg->avrc_br_mtu,
                                        bta_av_cb.sec_mask, BTA_ID_AV);
#else
                        bta_ar_reg_avct(p_bta_av_cfg->avrc_mtu, p_bta_av_cfg->avrc_br_mtu,
                                        (uint8_t)(bta_av_cb.sec_mask & (~BTA_SEC_AUTHORIZE)), BTA_ID_AV);
#endif
#endif
                        bta_av_rc_create(&bta_av_cb, AVCT_ACP, 0, BTA_AV_NUM_LINKS + 1);
                    }
#if (BTA_AR_INCLUDED == TRUE)
                    /* create an SDP record as AVRC CT. We create 1.3 for SOURCE
                     * because we rely on feature bits being scanned by external
                     * devices more than the profile version itself.
                     *
                     * We create 1.4 for SINK since we support browsing.
                     */
                    if (profile_initialized == UUID_SERVCLASS_AUDIO_SOURCE)
                    {
                        bta_ar_reg_avrc(UUID_SERVCLASS_AV_REMOTE_CONTROL, NULL, NULL,
                        p_bta_av_cfg->avrc_ct_cat, BTA_ID_AV,
                        (bta_av_cb.features & BTA_AV_FEAT_BROWSE), AVRC_REV_1_3);
                    }
                    else if (profile_initialized == UUID_SERVCLASS_AUDIO_SINK)
                    {
                        bta_ar_reg_avrc(UUID_SERVCLASS_AV_REMOTE_CONTROL, NULL, NULL,
                        p_bta_av_cfg->avrc_ct_cat, BTA_ID_AV,
                        (bta_av_cb.features & BTA_AV_FEAT_BROWSE), AVRC_REV_1_4);
                    }
#endif
                }
            }
            bta_av_cb.reg_audio |= BTA_AV_HNDL_TO_MSK(p_scb->hdi);
            APPL_TRACE_DEBUG("reg_audio: 0x%x",bta_av_cb.reg_audio);
        }
        else
        {
            bta_av_cb.reg_video = BTA_AV_HNDL_TO_MSK(p_scb->hdi);
            bta_av_cb.sdp_vdp_handle = SDP_CreateRecord();
            /* register the video channel */
            /* no need to verify the function pointer here. it's verified prior */
            (*p_bta_av_cfg->p_reg)(&cs, p_service_name, p_scb);
        }
    } while (0);

    /* call callback with register event */
    (*bta_av_cb.p_cback)(BTA_AV_REGISTER_EVT, (tBTA_AV *)&registr);
}

/*******************************************************************************
**
** Function         bta_av_api_deregister
**
** Description      de-register a channel
**
**
** Returns          void
**
*******************************************************************************/
void bta_av_api_deregister(tBTA_AV_DATA *p_data)
{
    tBTA_AV_SCB *p_scb = bta_av_hndl_to_scb(p_data->hdr.layer_specific);

    if(p_scb)
    {
        p_scb->deregistring = true;
        bta_av_ssm_execute(p_scb, BTA_AV_API_CLOSE_EVT, p_data);
    }
    else
    {
        bta_av_dereg_comp(p_data);
    }
}

/*******************************************************************************
**
** Function         bta_av_ci_data
**
** Description      forward the BTA_AV_CI_SRC_DATA_READY_EVT to stream state machine
**
**
** Returns          void
**
*******************************************************************************/
static void bta_av_ci_data(tBTA_AV_DATA *p_data)
{
    tBTA_AV_SCB *p_scb;
    int     i;
    uint8_t   chnl = (uint8_t)p_data->hdr.layer_specific;

    for( i=0; i < BTA_AV_NUM_STRS; i++ )
    {
        p_scb = bta_av_cb.p_scb[i];

        if(p_scb && p_scb->chnl == chnl)
        {
            bta_av_ssm_execute(p_scb, BTA_AV_SRC_DATA_READY_EVT, p_data);
        }
    }
}

/*******************************************************************************
**
** Function         bta_av_rpc_conn
**
** Description      report report channel open
**
** Returns          void
**
*******************************************************************************/
#if (AVDT_REPORTING == TRUE)
static void bta_av_rpc_conn(UNUSED_ATTR tBTA_AV_DATA *p_data)
{
}
#endif

/*******************************************************************************
**
** Function         bta_av_api_to_ssm
**
** Description      forward the API request to stream state machine
**
**
** Returns          void
**
*******************************************************************************/
static void bta_av_api_to_ssm(tBTA_AV_DATA *p_data)
{
    int xx;
    uint16_t event = p_data->hdr.event - BTA_AV_FIRST_A2S_API_EVT + BTA_AV_FIRST_A2S_SSM_EVT;

    for(xx=0; xx<BTA_AV_NUM_STRS; xx++)
    {
        bta_av_ssm_execute(bta_av_cb.p_scb[xx], event, p_data);
    }
}

/*******************************************************************************
**
** Function         bta_av_chk_start
**
** Description      if this is audio channel, check if more than one audio
**                  channel is connected & already started.
**
** Returns          true, if need api_start
**
*******************************************************************************/
bool bta_av_chk_start(tBTA_AV_SCB *p_scb)
{
    bool start = false;
    tBTA_AV_SCB *p_scbi;
    int i;

    if(p_scb->chnl == BTA_AV_CHNL_AUDIO)
    {
        if ((bta_av_cb.audio_open_cnt >= 2) &&
            ((0 == (p_scb->role & BTA_AV_ROLE_AD_ACP)) ||       /* Outgoing connection or   */
             (bta_av_cb.features & BTA_AV_FEAT_ACP_START)))     /* auto-starting option     */
        {
            /* more than one audio channel is connected */
            /* if this is the 2nd stream as ACP, give INT a chance to issue the START command */
            for(i=0; i<BTA_AV_NUM_STRS; i++)
            {
                p_scbi = bta_av_cb.p_scb[i];
                if(p_scbi && p_scbi->chnl == BTA_AV_CHNL_AUDIO && p_scbi->co_started)
                {
                    start = true;
                    /* may need to update the flush timeout of this already started stream */
                    if(p_scbi->co_started != bta_av_cb.audio_open_cnt)
                    {
                        p_scbi->co_started = bta_av_cb.audio_open_cnt;
                        L2CA_SetFlushTimeout(p_scbi->peer_addr, p_bta_av_cfg->p_audio_flush_to[p_scbi->co_started - 1] );
                    }
                }
            }
        }
    }
    return start;
}

/*******************************************************************************
**
** Function         bta_av_restore_switch
**
** Description      assume that the caller of this function already makes
**                  sure that there's only one ACL connection left
**
** Returns          void
**
*******************************************************************************/
void bta_av_restore_switch (void)
{
    tBTA_AV_CB   *p_cb = &bta_av_cb;
    int     i;
    uint8_t   mask;

    APPL_TRACE_DEBUG("reg_audio: 0x%x",bta_av_cb.reg_audio);
    for(i=0; i<BTA_AV_NUM_STRS; i++)
    {
        mask = BTA_AV_HNDL_TO_MSK(i);
        if (p_cb->conn_audio == mask)
        {
            if (p_cb->p_scb[i])
            {
                bta_sys_set_policy(BTA_ID_AV, HCI_ENABLE_MASTER_SLAVE_SWITCH, p_cb->p_scb[i]->peer_addr);
            }
            break;
        }
    }
}

/*******************************************************************************
**
** Function         bta_av_sys_rs_cback
**
** Description      Receives the role change event from dm
**
** Returns          (BTA_SYS_ROLE_CHANGE, new_role, hci_status, p_bda)
**
*******************************************************************************/
static void bta_av_sys_rs_cback (UNUSED_ATTR tBTA_SYS_CONN_STATUS status,uint8_t id,
                                 uint8_t app_id, BD_ADDR peer_addr)
{
    int         i;
    tBTA_AV_SCB *p_scb = NULL;
    uint8_t       cur_role;
    uint8_t       peer_idx = 0;

    APPL_TRACE_DEBUG("bta_av_sys_rs_cback: %d", bta_av_cb.rs_idx);
    for(i=0; i<BTA_AV_NUM_STRS; i++)
    {
        /* loop through all the SCBs to find matching peer addresses and report the role change event */
        /* note that more than one SCB (a2dp & vdp) maybe waiting for this event */
        p_scb = bta_av_cb.p_scb[i];
        if (p_scb && (bdcmp (peer_addr, p_scb->peer_addr) == 0)) {
            tBTA_AV_ROLE_RES *p_buf =
                (tBTA_AV_ROLE_RES *)osi_malloc(sizeof(tBTA_AV_ROLE_RES));
            APPL_TRACE_DEBUG("new_role:%d, hci_status:x%x hndl: x%x", id, app_id, p_scb->hndl);
            /*
            if ((id != BTM_ROLE_MASTER) && (app_id != HCI_SUCCESS))
            {
                bta_sys_set_policy(BTA_ID_AV, (HCI_ENABLE_MASTER_SLAVE_SWITCH|HCI_ENABLE_SNIFF_MODE), p_scb->peer_addr);
            }
            */
            p_buf->hdr.event = BTA_AV_ROLE_CHANGE_EVT;
            p_buf->hdr.layer_specific = p_scb->hndl;
            p_buf->new_role = id;
            p_buf->hci_status = app_id;
            bta_sys_sendmsg(p_buf);

            peer_idx = p_scb->hdi + 1;  /* Handle index for the peer_addr */
        }
    }

    /* restore role switch policy, if role switch failed */
    if ((HCI_SUCCESS != app_id) &&
        (BTM_GetRole (peer_addr, &cur_role) == BTM_SUCCESS) &&
        (cur_role == BTM_ROLE_SLAVE) )
    {
        bta_sys_set_policy(BTA_ID_AV, HCI_ENABLE_MASTER_SLAVE_SWITCH, peer_addr);
    }

    /* if BTA_AvOpen() was called for other device, which caused the role switch of the peer_addr,  */
    /* we need to continue opening process for the BTA_AvOpen().                                    */
    if ((bta_av_cb.rs_idx != 0) && (bta_av_cb.rs_idx != peer_idx))
    {
        if ((bta_av_cb.rs_idx -1) < BTA_AV_NUM_STRS)
        {
            p_scb = bta_av_cb.p_scb[bta_av_cb.rs_idx - 1];
        }
        if (p_scb && p_scb->q_tag == BTA_AV_Q_TAG_OPEN)
        {
            APPL_TRACE_DEBUG ("bta_av_sys_rs_cback: rs_idx(%d), hndl:x%x q_tag: %d",
                bta_av_cb.rs_idx, p_scb->hndl, p_scb->q_tag);

            if(HCI_SUCCESS == app_id || HCI_ERR_NO_CONNECTION == app_id)
                p_scb->q_info.open.switch_res = BTA_AV_RS_OK;
            else
                p_scb->q_info.open.switch_res = BTA_AV_RS_FAIL;

            /* Continue av open process */
            bta_av_do_disc_a2dp(p_scb, (tBTA_AV_DATA *)&(p_scb->q_info.open));
        }

        bta_av_cb.rs_idx = 0;
    }
}

/*******************************************************************************
**
** Function         bta_av_sco_chg_cback
**
** Description      receive & process the SCO connection up/down event from sys.
**                  call setup also triggers this callback, to suspend av before sco
**                  activity happens, or to resume av once call ends.
**
** Returns          void
**
*******************************************************************************/
static void bta_av_sco_chg_cback(tBTA_SYS_CONN_STATUS status,
                                 uint8_t id,UNUSED_ATTR uint8_t app_id,
                                 UNUSED_ATTR BD_ADDR peer_addr)
{
    tBTA_AV_SCB *p_scb;
    int     i;
    tBTA_AV_API_STOP stop;

    APPL_TRACE_DEBUG("bta_av_sco_chg_cback:%d status:%d", id, status);
    if(id)
    {
        bta_av_cb.sco_occupied = true;

        /* either BTA_SYS_SCO_OPEN or BTA_SYS_SCO_CLOSE with remaining active SCO */
        for(i=0; i<BTA_AV_NUM_STRS; i++)
        {
            p_scb = bta_av_cb.p_scb[i];

            if( p_scb && p_scb->co_started && (p_scb->sco_suspend == false))
            {
                APPL_TRACE_DEBUG("suspending scb:%d", i);
                /* scb is used and started, not suspended automatically */
                p_scb->sco_suspend = true;
                stop.flush   = false;
                stop.suspend = true;
                bta_av_ssm_execute(p_scb, BTA_AV_AP_STOP_EVT, (tBTA_AV_DATA *)&stop);
            }
        }
    }
    else
    {
        bta_av_cb.sco_occupied = false;

        for(i=0; i<BTA_AV_NUM_STRS; i++)
        {
            p_scb = bta_av_cb.p_scb[i];

            if( p_scb && p_scb->sco_suspend ) /* scb is used and suspended for SCO */
            {
                APPL_TRACE_DEBUG("starting scb:%d", i);
                bta_av_ssm_execute(p_scb, BTA_AV_AP_START_EVT, NULL);
            }
        }
    }
}

/*******************************************************************************
**
** Function         bta_av_switch_if_needed
**
** Description      This function checks if there is another existing AV
**                  channel that is local as slave role.
**                  If so, role switch and remove it from link policy.
**
** Returns          true, if role switch is done
**
*******************************************************************************/
bool bta_av_switch_if_needed(tBTA_AV_SCB *p_scb)
{
    uint8_t role;
    bool needed = false;
    tBTA_AV_SCB *p_scbi;
    int i;
    uint8_t       mask;

    for(i=0; i<BTA_AV_NUM_STRS; i++)
    {
        mask = BTA_AV_HNDL_TO_MSK(i);
        p_scbi = bta_av_cb.p_scb[i];
        if( p_scbi && (p_scb->hdi != i) && /* not the original channel */
            ((bta_av_cb.conn_audio & mask) ||/* connected audio */
            (bta_av_cb.conn_video & mask)) ) /* connected video */
        {
            BTM_GetRole(p_scbi->peer_addr, &role);
            /* this channel is open - clear the role switch link policy for this link */
            if(BTM_ROLE_MASTER != role)
            {
                if (bta_av_cb.features & BTA_AV_FEAT_MASTER)
                    bta_sys_clear_policy(BTA_ID_AV, HCI_ENABLE_MASTER_SLAVE_SWITCH, p_scbi->peer_addr);
                if (BTM_CMD_STARTED != BTM_SwitchRole(p_scbi->peer_addr, BTM_ROLE_MASTER, NULL))
                {
                    /* can not switch role on SCBI
                     * start the timer on SCB - because this function is ONLY called when SCB gets API_OPEN */
                    bta_sys_start_timer(p_scb->avrc_ct_timer,
                                        BTA_AV_RS_TIME_VAL,
                                        BTA_AV_AVRC_TIMER_EVT, p_scb->hndl);
                }
                needed = true;
                /* mark the original channel as waiting for RS result */
                bta_av_cb.rs_idx = p_scb->hdi + 1;
                break;
            }
        }
    }
    return needed;
}

/*******************************************************************************
**
** Function         bta_av_link_role_ok
**
** Description      This function checks if the SCB has existing ACL connection
**                  If so, check if the link role fits the requirements.
**
** Returns          true, if role is ok
**
*******************************************************************************/
bool bta_av_link_role_ok(tBTA_AV_SCB *p_scb, uint8_t bits)
{
    uint8_t role;
    bool is_ok = true;

    if (BTM_GetRole(p_scb->peer_addr, &role) == BTM_SUCCESS)
    {
        LOG_INFO(LOG_TAG, "%s hndl:x%x role:%d conn_audio:x%x bits:%d features:x%x",
                __func__, p_scb->hndl, role, bta_av_cb.conn_audio, bits,
                bta_av_cb.features);
        if (BTM_ROLE_MASTER != role &&
            (A2DP_BitsSet(bta_av_cb.conn_audio) > bits ||
             (bta_av_cb.features & BTA_AV_FEAT_MASTER)))  {
            if (bta_av_cb.features & BTA_AV_FEAT_MASTER)
                bta_sys_clear_policy(BTA_ID_AV, HCI_ENABLE_MASTER_SLAVE_SWITCH, p_scb->peer_addr);

            if (BTM_CMD_STARTED != BTM_SwitchRole(p_scb->peer_addr, BTM_ROLE_MASTER, NULL))
            {
                /* can not switch role on SCB - start the timer on SCB */
            }
            is_ok = false;
            p_scb->wait |= BTA_AV_WAIT_ROLE_SW_RES_START;

        }
    }

    return is_ok;
}

/*******************************************************************************
**
** Function         bta_av_chk_mtu
**
** Description      if this is audio channel, check if more than one audio
**                  channel is connected.
**
** Returns          The smallest mtu of the connected audio channels
**
*******************************************************************************/
uint16_t bta_av_chk_mtu(tBTA_AV_SCB *p_scb,
                        UNUSED_ATTR uint16_t mtu)
{
    uint16_t ret_mtu = BTA_AV_MAX_A2DP_MTU;
    tBTA_AV_SCB *p_scbi;
    int i;
    uint8_t   mask;

    /* TODO_MV mess with the mtu according to the number of EDR/non-EDR headsets */
    if(p_scb->chnl == BTA_AV_CHNL_AUDIO)
    {
        if(bta_av_cb.audio_open_cnt >= 2)
        {
            /* more than one audio channel is connected */
            for(i=0; i<BTA_AV_NUM_STRS; i++)
            {
                p_scbi = bta_av_cb.p_scb[i];
                if((p_scb != p_scbi) && p_scbi && (p_scbi->chnl == BTA_AV_CHNL_AUDIO) )
                {
                    mask = BTA_AV_HNDL_TO_MSK(i);
                    APPL_TRACE_DEBUG("[%d] mtu: %d, mask:0x%x",
                        i, p_scbi->stream_mtu, mask);
                    if(bta_av_cb.conn_audio & mask)
                    {
                        if(ret_mtu > p_scbi->stream_mtu)
                            ret_mtu = p_scbi->stream_mtu;
                    }
                }
            }
        }
        APPL_TRACE_DEBUG("bta_av_chk_mtu audio count:%d, conn_audio:0x%x, ret:%d",
            bta_av_cb.audio_open_cnt, bta_av_cb.conn_audio, ret_mtu);
    }
    return ret_mtu;
}

/*******************************************************************************
**
** Function         bta_av_dup_audio_buf
**
** Description      dup the audio data to the q_info.a2dp of other audio channels
**
** Returns          void
**
*******************************************************************************/
void bta_av_dup_audio_buf(tBTA_AV_SCB *p_scb, BT_HDR *p_buf)
{
    /* Test whether there is more than one audio channel connected */
    if ((p_buf == NULL) || (bta_av_cb.audio_open_cnt < 2))
        return;

    uint16_t copy_size = BT_HDR_SIZE + p_buf->len + p_buf->offset;
    for (int i = 0; i < BTA_AV_NUM_STRS; i++) {
        tBTA_AV_SCB *p_scbi = bta_av_cb.p_scb[i];

        if (i == p_scb->hdi)
            continue;           /* Ignore the original channel */
        if ((p_scbi == NULL) || !p_scbi->co_started)
            continue;           /* Ignore if SCB is not used or started */
        if (!(bta_av_cb.conn_audio & BTA_AV_HNDL_TO_MSK(i)))
            continue;           /* Audio is not connected */

        /* Enqueue the data */
        BT_HDR *p_new = (BT_HDR *)osi_malloc(copy_size);
        memcpy(p_new, p_buf, copy_size);
        list_append(p_scbi->a2dp_list, p_new);

        if (list_length(p_scbi->a2dp_list) > p_bta_av_cfg->audio_mqs) {
            // Drop the oldest packet
            bta_av_co_audio_drop(p_scbi->hndl);
            BT_HDR *p_buf_drop = static_cast<BT_HDR *>(list_front(p_scbi->a2dp_list));
            list_remove(p_scbi->a2dp_list, p_buf_drop);
            osi_free(p_buf_drop);
        }
    }
}

/*******************************************************************************
**
** Function         bta_av_sm_execute
**
** Description      State machine event handling function for AV
**
**
** Returns          void
**
*******************************************************************************/
void bta_av_sm_execute(tBTA_AV_CB *p_cb, uint16_t event, tBTA_AV_DATA *p_data)
{
    tBTA_AV_ST_TBL      state_table;
    uint8_t               action;

#if (BTA_AV_DEBUG == TRUE)
    APPL_TRACE_EVENT("AV event=0x%x(%s) state=%d(%s)",
        event, bta_av_evt_code(event), p_cb->state, bta_av_st_code(p_cb->state));
#else
    APPL_TRACE_EVENT("AV event=0x%x state=%d", event, p_cb->state);
#endif

    /* look up the state table for the current state */
    state_table = bta_av_st_tbl[p_cb->state];

    event &= 0x00FF;

    /* set next state */
    p_cb->state = state_table[event][BTA_AV_NEXT_STATE];
    APPL_TRACE_EVENT("next state=%d event offset:%d", p_cb->state, event);

    /* execute action functions */
    if ((action = state_table[event][BTA_AV_ACTION_COL]) != BTA_AV_IGNORE)
    {
        APPL_TRACE_EVENT("%s action executed %d", __func__, action);
        (*bta_av_action[action])(p_cb, p_data);
    }
}

/*******************************************************************************
**
** Function         bta_av_hdl_event
**
** Description      Advanced audio/video main event handling function.
**
**
** Returns          bool
**
*******************************************************************************/
bool bta_av_hdl_event(BT_HDR *p_msg)
{
    uint16_t event = p_msg->event;
    uint16_t first_event = BTA_AV_FIRST_NSM_EVT;

    if (event > BTA_AV_LAST_EVT)
    {
        return true; /* to free p_msg */
    }

    if(event >= first_event)
    {
#if (BTA_AV_DEBUG == TRUE)
        APPL_TRACE_VERBOSE("AV nsm event=0x%x(%s)", event, bta_av_evt_code(event));
#else
        APPL_TRACE_VERBOSE("AV nsm event=0x%x", event);
#endif
        /* non state machine events */
        (*bta_av_nsm_act[event - BTA_AV_FIRST_NSM_EVT]) ((tBTA_AV_DATA *) p_msg);
    }
    else if (event >= BTA_AV_FIRST_SM_EVT && event <= BTA_AV_LAST_SM_EVT)
    {
#if (BTA_AV_DEBUG == TRUE)
        APPL_TRACE_VERBOSE("AV sm event=0x%x(%s)", event, bta_av_evt_code(event));
#else
        APPL_TRACE_VERBOSE("AV sm event=0x%x", event);
#endif
        /* state machine events */
        bta_av_sm_execute(&bta_av_cb, p_msg->event, (tBTA_AV_DATA *) p_msg);
    }
    else
    {
        APPL_TRACE_VERBOSE("handle=0x%x", p_msg->layer_specific);
        /* stream state machine events */
        bta_av_ssm_execute( bta_av_hndl_to_scb(p_msg->layer_specific),
                                p_msg->event, (tBTA_AV_DATA *) p_msg);
    }
    return true;
}

/*****************************************************************************
**  Debug Functions
*****************************************************************************/
#if (BTA_AV_DEBUG == TRUE)
/*******************************************************************************
**
** Function         bta_av_st_code
**
** Description
**
** Returns          char *
**
*******************************************************************************/
static const char *bta_av_st_code(uint8_t state)
{
    switch(state)
    {
    case BTA_AV_INIT_ST: return "INIT";
    case BTA_AV_OPEN_ST: return "OPEN";
    default:             return "unknown";
    }
}
/*******************************************************************************
**
** Function         bta_av_evt_code
**
** Description
**
** Returns          char *
**
*******************************************************************************/
const char *bta_av_evt_code(uint16_t evt_code)
{
    switch(evt_code)
    {
    case BTA_AV_API_DISABLE_EVT: return "API_DISABLE";
    case BTA_AV_API_REMOTE_CMD_EVT: return "API_REMOTE_CMD";
    case BTA_AV_API_VENDOR_CMD_EVT: return "API_VENDOR_CMD";
    case BTA_AV_API_VENDOR_RSP_EVT: return "API_VENDOR_RSP";
    case BTA_AV_API_META_RSP_EVT: return "API_META_RSP_EVT";
    case BTA_AV_API_RC_CLOSE_EVT: return "API_RC_CLOSE";
    case BTA_AV_AVRC_OPEN_EVT: return "AVRC_OPEN";
    case BTA_AV_AVRC_MSG_EVT: return "AVRC_MSG";
    case BTA_AV_AVRC_NONE_EVT: return "AVRC_NONE";

    case BTA_AV_API_OPEN_EVT: return "API_OPEN";
    case BTA_AV_API_CLOSE_EVT: return "API_CLOSE";
    case BTA_AV_AP_START_EVT: return "AP_START";
    case BTA_AV_AP_STOP_EVT: return "AP_STOP";
    case BTA_AV_API_RECONFIG_EVT: return "API_RECONFIG";
    case BTA_AV_API_PROTECT_REQ_EVT: return "API_PROTECT_REQ";
    case BTA_AV_API_PROTECT_RSP_EVT: return "API_PROTECT_RSP";
    case BTA_AV_API_RC_OPEN_EVT: return "API_RC_OPEN";
    case BTA_AV_SRC_DATA_READY_EVT: return "SRC_DATA_READY";
    case BTA_AV_CI_SETCONFIG_OK_EVT: return "CI_SETCONFIG_OK";
    case BTA_AV_CI_SETCONFIG_FAIL_EVT: return "CI_SETCONFIG_FAIL";
    case BTA_AV_SDP_DISC_OK_EVT: return "SDP_DISC_OK";
    case BTA_AV_SDP_DISC_FAIL_EVT: return "SDP_DISC_FAIL";
    case BTA_AV_STR_DISC_OK_EVT: return "STR_DISC_OK";
    case BTA_AV_STR_DISC_FAIL_EVT: return "STR_DISC_FAIL";
    case BTA_AV_STR_GETCAP_OK_EVT: return "STR_GETCAP_OK";
    case BTA_AV_STR_GETCAP_FAIL_EVT: return "STR_GETCAP_FAIL";
    case BTA_AV_STR_OPEN_OK_EVT: return "STR_OPEN_OK";
    case BTA_AV_STR_OPEN_FAIL_EVT: return "STR_OPEN_FAIL";
    case BTA_AV_STR_START_OK_EVT: return "STR_START_OK";
    case BTA_AV_STR_START_FAIL_EVT: return "STR_START_FAIL";
    case BTA_AV_STR_CLOSE_EVT: return "STR_CLOSE";
    case BTA_AV_STR_CONFIG_IND_EVT: return "STR_CONFIG_IND";
    case BTA_AV_STR_SECURITY_IND_EVT: return "STR_SECURITY_IND";
    case BTA_AV_STR_SECURITY_CFM_EVT: return "STR_SECURITY_CFM";
    case BTA_AV_STR_WRITE_CFM_EVT: return "STR_WRITE_CFM";
    case BTA_AV_STR_SUSPEND_CFM_EVT: return "STR_SUSPEND_CFM";
    case BTA_AV_STR_RECONFIG_CFM_EVT: return "STR_RECONFIG_CFM";
    case BTA_AV_AVRC_TIMER_EVT: return "AVRC_TIMER";
    case BTA_AV_AVDT_CONNECT_EVT: return "AVDT_CONNECT";
    case BTA_AV_AVDT_DISCONNECT_EVT: return "AVDT_DISCONNECT";
    case BTA_AV_ROLE_CHANGE_EVT: return "ROLE_CHANGE";
    case BTA_AV_AVDT_DELAY_RPT_EVT: return "AVDT_DELAY_RPT";
    case BTA_AV_ACP_CONNECT_EVT: return "ACP_CONNECT";

    case BTA_AV_API_ENABLE_EVT: return "API_ENABLE";
    case BTA_AV_API_REGISTER_EVT: return "API_REG";
    case BTA_AV_API_DEREGISTER_EVT: return "API_DEREG";
    case BTA_AV_API_DISCONNECT_EVT: return "API_DISCNT";
    case BTA_AV_CI_SRC_DATA_READY_EVT: return "CI_DATA_READY";
    case BTA_AV_SIG_CHG_EVT: return "SIG_CHG";
    case BTA_AV_SIGNALLING_TIMER_EVT: return "SIGNALLING_TIMER";
    case BTA_AV_SDP_AVRC_DISC_EVT: return "SDP_AVRC_DISC";
    case BTA_AV_AVRC_CLOSE_EVT: return "AVRC_CLOSE";
    case BTA_AV_AVRC_BROWSE_OPEN_EVT: return "AVRC_BROWSE_OPEN";
    case BTA_AV_AVRC_BROWSE_CLOSE_EVT: return "AVRC_BROWSE_CLOSE";
    case BTA_AV_CONN_CHG_EVT: return "CONN_CHG";
    case BTA_AV_DEREG_COMP_EVT: return "DEREG_COMP";
#if (AVDT_REPORTING == TRUE)
    case BTA_AV_AVDT_RPT_CONN_EVT: return "RPT_CONN";
#endif
    case BTA_AV_API_START_EVT: return "API_START";
    case BTA_AV_API_STOP_EVT: return "API_STOP";
    default:             return "unknown";
    }
}
#endif /* BTA_AV_DEBUG */