udpate uac_vol

lib_xua/lib_xua/src/core/endpoint0/xua_ep0_uacreqs.xc

@@ -15,6 +15,8 @@
 #include "dbcalc.h"
 #include "xua_commands.h"
 
+#include "xc_ptr.h"
+
 #define CS_XU_MIXSEL (0x06)
 
 /* From decouple.xc */
@@ -48,6 +50,8 @@ extern unsigned char mixSel[MAX_MIX_COUNT][MIX_INPUTS];
 
 /* Global var for current frequency, set to default freq */
 unsigned int g_curSamFreq = DEFAULT_FREQ;
+
+int g_uac_vol = 0;
 #if 0
 unsigned int g_curSamFreq48000Family = DEFAULT_FREQ % 48000 == 0;
 
@@ -126,7 +130,7 @@ static void updateMasterVol(int unitID, chanend ?c_mix_ctl)
         case FU_USBOUT:
             {
                 unsigned master_vol = volsOut[0] == 0x8000 ? 0 : db_to_mult(volsOut[0], 8, 29);
-
+SET_SHARED_GLOBAL(g_uac_vol, volsOut[0]);
                 for (int i = 1; i < (NUM_USB_CHAN_OUT + 1); i++)
                 {
                     /* Calc multipliers with 29 fractional bits from a db value with 8 fractional bits */
@@ -213,7 +217,8 @@ static void updateVol(int unitID, int channel, chanend ?c_mix_ctl)
                 unsigned vol = volsOut[channel] == 0x8000 ? 0 : db_to_mult(volsOut[channel], 8, 29);
 
                 x = longMul(master_vol, vol, 29) * !mutesOut[0] * !mutesOut[channel];
-
+                if (channel == 1)
+                    SET_SHARED_GLOBAL(g_uac_vol, volsOut[channel]); // only update the front left channel
 #if (OUT_VOLUME_IN_MIXER)
                 if (!isnull(c_mix_ctl))
                 {