94 static Callbacks* bt_hf_callbacks = nullptr;  variable
98     if (!bt_hf_callbacks) {                                           \
305   if (!bt_hf_callbacks) {  in btif_hf_upstreams_evt()
338             bt_hf_callbacks->ConnectionStateCallback(  in btif_hf_upstreams_evt()
356           bt_hf_callbacks->ConnectionStateCallback(  in btif_hf_upstreams_evt()
371         bt_hf_callbacks->ConnectionStateCallback(  in btif_hf_upstreams_evt()
386         bt_hf_callbacks->ConnectionStateCallback(btif_hf_cb[idx].state,  in btif_hf_upstreams_evt()
403       bt_hf_callbacks->ConnectionStateCallback(btif_hf_cb[idx].state,  in btif_hf_upstreams_evt()
415       bt_hf_callbacks->ConnectionStateCallback(btif_hf_cb[idx].state,  in btif_hf_upstreams_evt()
424       bt_hf_callbacks->AudioStateCallback(BTHF_AUDIO_STATE_CONNECTED,  in btif_hf_upstreams_evt()
430       bt_hf_callbacks->AudioStateCallback(BTHF_AUDIO_STATE_DISCONNECTED,  in btif_hf_upstreams_evt()
438       bt_hf_callbacks->VolumeControlCallback(  in btif_hf_upstreams_evt()
445       bt_hf_callbacks->AnswerCallCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
451       bt_hf_callbacks->DialCallCallback(  in btif_hf_upstreams_evt()
457       bt_hf_callbacks->HangupCallCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
461       bt_hf_callbacks->AtCindCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
465       bt_hf_callbacks->DtmfCmdCallback(p_data->val.str[0],  in btif_hf_upstreams_evt()
470       bt_hf_callbacks->VoiceRecognitionCallback((p_data->val.num == 1)  in btif_hf_upstreams_evt()
477       bt_hf_callbacks->NoiseReductionCallback(  in btif_hf_upstreams_evt()
487       bt_hf_callbacks->KeyPressedCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
495         bt_hf_callbacks->WbsCallback(BTHF_WBS_NO,  in btif_hf_upstreams_evt()
498         bt_hf_callbacks->WbsCallback(BTHF_WBS_YES,  in btif_hf_upstreams_evt()
501         bt_hf_callbacks->WbsCallback(BTHF_WBS_NONE,  in btif_hf_upstreams_evt()
508       bt_hf_callbacks->AtChldCallback((bthf_chld_type_t)atoi(p_data->val.str),  in btif_hf_upstreams_evt()
513       bt_hf_callbacks->AtClccCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
517       bt_hf_callbacks->AtCopsCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
521       bt_hf_callbacks->UnknownAtCallback(p_data->val.str,  in btif_hf_upstreams_evt()
526       bt_hf_callbacks->AtCnumCallback(&btif_hf_cb[idx].connected_bda);  in btif_hf_upstreams_evt()
557       bt_hf_callbacks->WbsCallback(  in btif_hf_upstreams_evt()
564         bt_hf_callbacks->AtBindCallback(p_data->val.str,  in btif_hf_upstreams_evt()
571         bt_hf_callbacks->AtBievCallback((bthf_hf_ind_type_t)p_data->val.lidx,  in btif_hf_upstreams_evt()
583         bt_hf_callbacks->AtBiaCallback(service, roam, signal, battery,  in btif_hf_upstreams_evt()
692   if (!bt_hf_callbacks) return true;  in IsCallIdle()
766   bt_hf_callbacks = callbacks;  in Init()
818                               base::Unretained(bt_hf_callbacks),  in ConnectAudio()
1412   do_in_jni_thread(FROM_HERE, base::Bind([]() { bt_hf_callbacks = nullptr; }));  in Cleanup()