增加MAC电脑连接的指示

lib_xua/src/core/endpoint0/xua_ep0_uacreqs.xc

@@ -117,7 +117,7 @@ static unsigned longMul(unsigned a, unsigned b, int prec)
     ret = (x << (32-prec) | (y >> prec));
     return ret;
 }
-
+ extern void sound_effect_set_pc_connect_status( int status);
 /* Update master volume i.e. i.e update weights for all channels */
 static void updateMasterVol(int unitID, chanend ?c_mix_ctl)
 {
@@ -166,7 +166,9 @@ static void updateMasterVol(int unitID, chanend ?c_mix_ctl)
                     unsigned vol = volsIn[i] == 0x8000 ? 0 : db_to_mult(volsIn[i], 8, 29);
 
                     int x = longMul(master_vol, vol, 29) * !mutesIn[0] * !mutesIn[i];
-
+                    //mac
+                   
+                    sound_effect_set_pc_connect_status(1);
 #if (IN_VOLUME_IN_MIXER)
                     if (!isnull(c_mix_ctl))
                     {
@@ -235,6 +237,7 @@ static void updateVol(int unitID, int channel, chanend ?c_mix_ctl)
             }
            case FU_USBIN:
            {
+            //windows
                 /* Calc multipliers with 29 fractional bits from a db value with 8 fractional bits */
                 /* 0x8000 is a special value representing -inf (i.e. mute) */
                 unsigned master_vol = volsIn[0] == 0x8000 ? 0 : db_to_mult(volsIn[0], 8, 29);