--- a/branches/AudioEngine/xbmc/cores/AudioEngine/AEPackIEC958.h
+++ b/branches/AudioEngine/xbmc/cores/AudioEngine/AEPackIEC958.h
@@ -41,6 +41,10 @@
 #define EAC3_FRAME_SIZE   MAX_IEC958_PACKET
 #define TRUEHD_FRAME_SIZE 6144
 
+#define OUT_SAMPLESIZE 16
+#define OUT_CHANNELS 2
+#define OUT_FRAMESTOBYTES(a) ((a) * OUT_CHANNELS * (OUT_SAMPLESIZE>>3))
+
 class CAEPackIEC958
 {
 public: