复杂的if else,switch case 条件判断，用表驱动方法如何优化

void UserSet_Effect(User * const me)
{
    int TempEffect;
    int machine;
    const INIT_STRUCT *AmpTab =NULL;

    if(me->Night)
        TempEffect = eEq_Night;
    else
        TempEffect = me->Effect;

    machine = me->channel_search;
   
    {
        if(TempEffect == eEq_Off || TempEffect == eEq_On){
            switch (machine)
            {
                case channel_RL:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_only_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_only_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_only_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_only_digital;
                        }
                    }
               
                break;
                case channel_RL_Sub:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_sub_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_sub_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_sub_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_sub_digital;
                        }
                    }
               
                    
                break;   
                case channel_RL_RLs:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_surr_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_surr_digital;
                        }
                    }
                    
                break;
                case channel_RL_RLs_Sub:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_sub_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_sub_surr_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcVaOn_SB_sub_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcVaOn_SB_sub_surr_digital;
                        }
                    }
               
                break;
            }
        
        }else if(TempEffect == eEq_Night){
            switch (machine)
            {
                case channel_RL:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_only_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_only_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_only_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_only_digital;
                        }
                    }
               
                break;
                case channel_RL_Sub:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_sub_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_sub_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_sub_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_sub_digital;
                        }
                    }
               
                    
                break;   
                case channel_RL_RLs:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_surr_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_surr_digital;
                        }
                    }
                    
                break;
                case channel_RL_RLs_Sub:
                    if ((me->BitstreamInfo == (BITSTREAM_CH_L | BITSTREAM_CH_R))
                    || (me->BitstreamInfo == BITSTREAM_CH_L)
                    || (me->BitstreamInfo == BITSTREAM_CH_R)
                    ){
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_sub_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_sub_surr_digital;
                        }
                    }else
                    {
                        if (me->UserSrc_tbl[me->iSrc] == eAp_AUX_Src){
                            AmpTab = AmpDrcNight_SB_sub_surr_aux;
                        }
                        else{
                            AmpTab = AmpDrcNight_SB_sub_surr_digital;
                        }
                    }
               
                break;
            
           }

        
       }
       if (AmpTab != NULL)
          UserAmp(AmpTab, 1);
    }
}