HSP Profile注册过程（未完成）

来源：互联网发布：淘宝怎样卖虚拟物品编辑：程序博客网时间：2024/06/10 00:27

当蓝牙初始化完成后，接下来该做的就是注册各种服务了。首先我们来看下hs profile，该服务是用于连接蓝牙耳机。

在HeadsetService.java中，start（）函数中，注册了一个HeadsetStateMachine（在诸如a2dp服务中都分别注册了一个状态机）。

 private HeadsetStateMachine(HeadsetService context) {        mPhonebook = new AtPhonebook(mService, this);//控制电话拨号挂断等        mPhoneState = new HeadsetPhoneState(context, this);  ****省略****        initializeNative();//下面看这个        addState(mDisconnected);        addState(mPending);        addState(mConnected);        addState(mAudioOn);        setInitialState(mDisconnected);    }

跟之前一样，initializeNative函数中应该是干正事的地方，com_android_bluetooth_hfp.cpp是他实现的地方，

tatic void initializeNative(JNIEnv *env, jobject object) {    if ( (sBluetoothHfpInterface = (bthf_interface_t *)          btInf->get_profile_interface(BT_PROFILE_HANDSFREE_ID)) == NULL) {        ALOGE("Failed to get Bluetooth Handsfree Interface");        return;    }    if ( (status = sBluetoothHfpInterface->init(&sBluetoothHfpCallbacks)) != BT_STATUS_SUCCESS) {        ALOGE("Failed to initialize Bluetooth HFP, status: %d", status);        sBluetoothHfpInterface = NULL;        return;    }    mCallbacksObj = env->NewGlobalRef(object);}

根据调用的profile id BT_PROFILE_HANDSFREE_ID，具体使用的是btif_hf.c中的bthfInterface，sBluetoothHfpInterface则是回调的函数。

接下来来看bthfInterface中的init函数，

#if (defined(BTIF_HF_SERVICES) && (BTIF_HF_SERVICES & BTA_HFP_SERVICE_MASK))    btif_enable_service(BTA_HFP_SERVICE_ID);#else    btif_enable_service(BTA_HSP_SERVICE_ID);#endif

由于4.4默认只支持hsp，所以只是enable了hsp的service。

void btif_dm_execute_service_request(UINT16 event, char *p_param){    BOOLEAN b_enable = FALSE;    bt_status_t status;    if (event == BTIF_DM_ENABLE_SERVICE)    {        b_enable = TRUE;    }    status = btif_in_execute_service_request(*((tBTA_SERVICE_ID*)p_param), b_enable);    if (status == BT_STATUS_SUCCESS)    {        bt_property_t property;        bt_uuid_t local_uuids[BT_MAX_NUM_UUIDS];        /* Now send the UUID_PROPERTY_CHANGED event to the upper layer */        BTIF_STORAGE_FILL_PROPERTY(&property, BT_PROPERTY_UUIDS,                                    sizeof(local_uuids), local_uuids);        btif_storage_get_adapter_property(&property);        HAL_CBACK(bt_hal_cbacks, adapter_properties_cb,                          BT_STATUS_SUCCESS, 1, &property);    }    return;}

注册过程btif_in_execute_service_request：

bt_status_t btif_in_execute_service_request(tBTA_SERVICE_ID service_id,                                                BOOLEAN b_enable){    /* Check the service_ID and invoke the profile's BT state changed API */    switch (service_id)    {         case BTA_HFP_SERVICE_ID:         case BTA_HSP_SERVICE_ID:         {              btif_hf_execute_service(b_enable);         }break;         case BTA_A2DP_SERVICE_ID:         {              btif_av_execute_service(b_enable);         }break;         case BTA_HID_SERVICE_ID:         {              btif_hh_execute_service(b_enable);         }break;         default:              BTIF_TRACE_ERROR1("%s: Unknown service being enabled", __FUNCTION__);              return BT_STATUS_FAIL;    }    return BT_STATUS_SUCCESS;}

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