--- bitstream.h	2002/06/14 13:25:07	1.7
+++ bitstream.h	2002/06/30 10:46:29	1.10
@@ -41,7 +41,9 @@
   *																			   *	
   *  Revision history:                                                         *
   *                                                                            *
-  *  26.03.2002 interlacing support - modified putvol/vopheaders paramters
+  *  28.06.2002 addded BitstreamNumBitsToByteAlign()                           *
+  *                    BitstreamShowBitsFromByteAlign()                        *
+  *  26.03.2002 interlacing support - modified putvol/vopheaders paramters     *
   *  04.03.2002 putbits speedup (Isibaar)                                      *
   *  03.03.2002 merged BITREADER and BITWRITER (Isibaar)                       *
   *	 16.12.2001	inital version                                           	   *
@@ -110,6 +112,14 @@
 #define S_VOP	3
 #define N_VOP	4
 
+// resync-specific
+#define NUMBITS_VP_RESYNC_MARKER  17
+#define RESYNC_MARKER 1
+
+
+int
+read_video_packet_header(Bitstream *bs, const int addbits, int * quant);
+
 
 // header stuff
 int BitstreamReadHeaders(Bitstream * bs,
@@ -127,7 +137,12 @@
 
 void BitstreamWriteVopHeader(Bitstream * const bs,
 							 const MBParam * pParam,
-							 const FRAMEINFO * frame);
+							 const FRAMEINFO * frame,
+							 int vop_coded);
+
+void BitstreamWriteUserData(Bitstream * const bs, 
+							uint8_t * data, 
+							const int length);
 
 /* initialise bitstream structure */
 
@@ -225,6 +240,36 @@
 }
 
 
+// number of bits to next byte alignment
+static __inline uint32_t 
+BitstreamNumBitsToByteAlign(Bitstream *bs)
+{
+	uint32_t n = (32 - bs->pos) % 8;
+	return n == 0 ? 8 : n;
+}
+
+
+// show nbits from next byte alignment
+static __inline uint32_t
+BitstreamShowBitsFromByteAlign(Bitstream *bs, int bits)
+{
+	int bspos = bs->pos + BitstreamNumBitsToByteAlign(bs);
+	int nbit = (bits + bspos) - 32;
+
+	if (bspos >= 32) {
+		return bs->bufb >> (32 - nbit);
+	} else	if (nbit > 0) {
+		return ((bs->bufa & (0xffffffff >> bspos)) << nbit) | (bs->
+																 bufb >> (32 -
+																		  nbit));
+	} else {
+		return (bs->bufa & (0xffffffff >> bspos)) >> (32 - bspos - bits);
+	}
+
+}
+
+
+
 /* move forward to the next byte boundary */
 
 static __inline void