c_dig_rx is no longer nullable (helps with timing due to issue with compiler checks)

module_usb_audio/audio.h

@@ -1,6 +1,7 @@
 #ifndef __audio_h__
 #define __audio_h__
 
+#include "devicedefines.h"
 /** The audio driver thread.
  *
  *  This function drives I2S ports and handles samples to/from other digital
@@ -13,6 +14,10 @@
  *  \param c_config An optional channel that will be passed on to the
  *                  CODEC configuration functions.
  */
-void audio(chanend c_in, chanend ?c_dig, chanend ?c_config, chanend ?c_adc);
+void audio(chanend c_in, 
+#if (defined(SPDIF_RX) || defined(ADAT_RX))    
+    chanend c_dig, 
+#endif
+    chanend ?c_config, chanend ?c_adc);
 
 #endif // __audio_h__

module_usb_audio/audio.xc

@@ -144,7 +144,11 @@ static inline void doI2SClocks(unsigned divide)
 
 /* I2S delivery thread */
 #pragma unsafe arrays
-unsigned static deliver(chanend c_out, chanend ?c_spd_out, unsigned divide, unsigned curSamFreq, chanend ?c_dig_rx, chanend ?c_adc)
+unsigned static deliver(chanend c_out, chanend ?c_spd_out, unsigned divide, unsigned curSamFreq, 
+#if(defined(SPDIF_RX) || defined(ADAT_RX))
+chanend c_dig_rx, 
+#endif
+chanend ?c_adc)
 {
 #if (I2S_CHANS_ADC != 0) || defined(SPDIF)
 	unsigned sample;
@@ -779,7 +783,11 @@ unsigned static dummy_deliver(chanend c_out)
 #define SAMPLES_PER_PRINT 1
 
 
-void audio(chanend c_mix_out, chanend ?c_dig_rx, chanend ?c_config, chanend ?c)
+void audio(chanend c_mix_out, 
+#if (defined(ADAT_RX) || defined(SPDIF_RX))
+chanend c_dig_rx, 
+#endif
+chanend ?c_config, chanend ?c)
 {
 #ifdef SPDIF
     chan c_spdif_out;

module_usb_audio/main.xc

@@ -429,9 +429,17 @@ chanend ?c_clk_int
         {
             thread_speed();
 #ifdef MIXER
-            audio(c_mix_out, c_dig_rx, c_aud_cfg, c_adc);
+            audio(c_mix_out, 
+#if defined(SPDIF_RX) || defined(ADAT_RX)
+        c_dig_rx, 
+#endif
+        c_aud_cfg, c_adc);
 #else
-            audio(c_aud_in, c_dig_rx, c_aud_cfg, c_adc);
+            audio(c_aud_in, 
+#if defined(SPDIF_RX) || defined(ADAT_RX)
+            c_dig_rx, 
+#endif
+            c_aud_cfg, c_adc);
 #endif
         }