Aux_thread()
{
    while(1)
    {
        boolean pcm_handle_opened = 0;
        if (Aux_detected == 1)
        {
            /* Aux가 핸들을 가지고 있을 경우*/
            if (vendor.audio.skb.i2s0_owner_is == AUX)
            {
                if(vendor.audio.skb.i2s0_owner_to_be == NUGUCALL)
                {
                    if (pcm_handle_opened)
                    {
                        pcm_close();
                        pcm_handle_opened = 0;
                        vendor.audio.skb.i2s0_owner_is = NUGUCALL;
                    }
                }
                else if(vendor.audio.skb.i2s0_owner_to_be == AUX)
                {
                    if(!pcm_handle_opened)
                    {
                        pcm_handle_opened = 1;
                        pcm_open()
                    }
                }    
                sleep(1000);            
            }
            else
            {
                if (vendor.audio.skb.i2s0_owner_is == NUGUCALL)
                {
                    print("can't get handle because of NUGUCALL);
                }
                else if (vendor.audio.skb.i2s0_owner_is == NUGU) 
                {
                    if (vendor.audio.skb.i2s0_owner_to_be != AUX)
                    {
                        vendor.audio.skb.i2s0_owner_to_be = AUX;
                    }
                }
                sleep(1000);
            }
        }
        else
        {
            if(pcm_handle_opened)
            {
                vendor.audio.skb.i2s0_owner_to_be = NUGU;
                vendor.audio.skb.i2s0_owner_is    = NUGU;          
            }
        }
    }
}


NUGU_thread()
{
    boolean nugucall_detect = 0, pcm_handle_opened = 1;
    
    while()
    {
        if (nugucall_detect == 1)
        {
            /* handle 필요 */
            if (vendor.audio.skb.i2s0_owner_is == NUGU || endor.audio.skb.i2s0_owner_is == NUGUCALL)
            {
                if(pcm_handle_opened == 0)
                {
                    pcm_handle_opened = 1;
                    pcm_open();
                }
            }
            else
            {
                vendor.audio.skb.i2s0_owner_to_be = NUGUCALL;
            }
            sleep(1000);
        }
        else
        {   
            
            if(vendor.audio.skb.i2s0_owner_to_be != NUGU)  /* AUX 또는 KARAOKE 가 handle 요구 */
            {
                if (pcm_handle_opened)
                {
                    pcm_close();
                    pcm_handle_opened = 0;    
                }
                vendor.audio.skb.i2s0_owner_is = vendor.audio.skb.i2s0_owner_to_be;
            }
            else
            {
                if(vendor.audio.skb.i2s0_owner_is == NUGU)
                {
                    if (!pcm_handle_opened)
                    {
                        pcm_open();        
                        pcm_handle_opened = 1;    
                    }
                }
            }
        }
    }
}