--- global.h	2002/03/26 11:16:08	1.2
+++ global.h	2002/04/13 16:30:01	1.5
@@ -1,9 +1,10 @@
 #ifndef _GLOBAL_H_
 #define _GLOBAL_H_
 
+#include "xvid.h"
 #include "portab.h"
 
-/* --- macroblock stuff --- */
+/* --- macroblock modes --- */
 
 #define MODE_INTER		0
 #define MODE_INTER_Q	1
@@ -13,11 +14,25 @@
 #define MODE_STUFFING	7
 #define MODE_NOT_CODED	16
 
+/* --- bframe specific --- */
+
+#define MODE_DIRECT			0
+#define MODE_INTERPOLATE	1
+#define MODE_BACKWARD		2
+#define MODE_FORWARD		3
+
+
 typedef struct
 {
-	int x;
-	int y;
-} VECTOR;
+	uint32_t bufa;
+	uint32_t bufb;
+	uint32_t buf;
+	uint32_t pos;
+	uint32_t *tail;
+	uint32_t *start;
+	uint32_t length;
+} 
+Bitstream;
 
 
 #define MBPRED_SIZE  15
@@ -47,6 +62,11 @@
 	int dquant;
 	int cbp;
 
+	// bframe stuff
+
+	VECTOR b_mvs[4];
+	VECTOR b_pmvs[4];
+
 } MACROBLOCK;
 
 static __inline int8_t get_dc_scaler(int32_t quant, uint32_t lum)
@@ -81,4 +101,13 @@
     return dc_scaler;
 }
 
-#endif /* _GLOBAL_H_ */
\ No newline at end of file
+
+// useful macros
+
+#define MIN(X, Y) ((X)<(Y)?(X):(Y))
+#define MAX(X, Y) ((X)>(Y)?(X):(Y))
+#define ABS(X)    (((X)>0)?(X):-(X))
+#define SIGN(X)   (((X)>0)?1:-1)
+
+
+#endif /* _GLOBAL_H_ */