User microphone processing now uses an interface (old call back code still available - see MIC_PROCESSING_USE_INTERACE)

module_usb_audio/pdm_mics/pcm_pdm_mic.h

@@ -1,2 +1,29 @@
 
+#include "mic_array.h"
+
 void pcm_pdm_mic(chanend c_pcm_out);
+
+#ifdef MIC_PROCESSING_USE_INTERFACE
+/* Interface based user processing */
+typedef interface mic_process_if
+{
+    //[[guarded]]
+    //void transfer_buffers(int * unsafe in_mic_buf, int * unsafe in_spk_buf, int * unsafe out_mic_buf, int * unsafe out_spk_buf);
+    void transfer_buffers(mic_array_frame_time_domain * unsafe audio, int output[]);
+
+    void init();
+} mic_process_if;
+
+[[distributable]]
+unsafe void user_pdm_process(server mic_process_if i_mic_data);
+
+#else
+
+/* Simple user hooks/call-backs */
+unsafe void user_pdm_process(mic_array_frame_time_domain * unsafe audio, int output[]);
+
+void user_pdm_init();
+
+#endif
+
+