--- mbcoding.c	2002/06/14 13:24:58	1.18
+++ mbcoding.c	2002/09/04 03:23:28	1.25
@@ -41,6 +41,7 @@
   *																			   *	
   *  Revision history:                                                         *
   *                                                                            *
+  *  28.06.2002 added check_resync_marker()                                    *
   *  14.04.2002 bframe encoding												   *
   *  08.03.2002 initial version; isibaar					                   *
   *																			   *
@@ -369,8 +370,10 @@
 
 	// interlacing
 	if (frame->global_flags & XVID_INTERLACING) {
-		BitstreamPutBit(bs, pMB->field_dct);
-		DEBUG1("codep: field_dct: ", pMB->field_dct);
+		if (pMB->cbp) {
+			BitstreamPutBit(bs, pMB->field_dct);
+			DEBUG1("codep: field_dct: ", pMB->field_dct);
+		}
 
 		// if inter block, write field ME flag
 		if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) {
@@ -411,24 +414,26 @@
 		 Statistics * pStat)
 {
 
-	int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q);
-
 	if (frame->coding_type == P_VOP) {
-		if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 &&
-			pMB->mvs[0].y == 0) {
-			BitstreamPutBit(bs, 1);	// not_coded
-			return;
-		} else
 			BitstreamPutBit(bs, 0);	// coded
 	}
 
-	if (intra)
+	if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
 		CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
 	else
 		CodeBlockInter(frame, pMB, qcoeff, bs, pStat);
 
 }
 
+
+void
+MBSkip(Bitstream * bs)
+{
+	BitstreamPutBit(bs, 1);	// not coded
+	return;
+}
+
+
 /***************************************************************
  * bframe encoding start
  ***************************************************************/
@@ -517,11 +522,11 @@
 	int i;
 
 /*	------------------------------------------------------------------
-		when a block is skipped it is decoded DIRECT(0,)
-		hence are interpolated from forward & backward frames
+		when a block is skipped it is decoded DIRECT(0,0)
+		hence is interpolated from forward & backward frames
 	------------------------------------------------------------------ */
 
-	if (mb->mode == 5) {
+	if (mb->mode == MODE_DIRECT_NONE_MV) {
 		BitstreamPutBit(bs, 1);	// skipped
 		return;
 	}
@@ -555,7 +560,8 @@
 	}
 
 	if (mb->mode == MODE_DIRECT) {
-		// TODO: direct
+		CodeVector(bs, mb->deltamv.x, 1, pStat);		/* fcode is always 1 for delta vector */
+		CodeVector(bs, mb->deltamv.y, 1, pStat);		/* prediction is always (0,0) */
 	}
 
 	for (i = 0; i < 6; i++) {
@@ -571,15 +577,38 @@
  * decoding stuff starts here                                  *
  ***************************************************************/
 
+
+// for IVOP addbits == 0
+// for PVOP addbits == fcode - 1
+// for BVOP addbits == max(fcode,bcode) - 1
+// returns true or false
+int 
+check_resync_marker(Bitstream * bs, int addbits)
+{
+	uint32_t nbits;
+	uint32_t code;
+	uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
+
+	nbits = BitstreamNumBitsToByteAlign(bs);
+	code = BitstreamShowBits(bs, nbits);
+
+	if (code == (((uint32_t)1 << (nbits - 1)) - 1))
+	{
+		return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER;
+	}
+
+	return 0;
+}
+
+
+
 int
 get_mcbpc_intra(Bitstream * bs)
 {
 
 	uint32_t index;
 
-	while ((index = BitstreamShowBits(bs, 9)) == 1)
-		BitstreamSkip(bs, 9);
-
+	index = BitstreamShowBits(bs, 9);
 	index >>= 3;
 
 	BitstreamSkip(bs, mcbpc_intra_table[index].len);
@@ -593,9 +622,8 @@
 {
 
 	uint32_t index;
-
-	while ((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1)
-		BitstreamSkip(bs, 9);
+	
+	index = CLIP(BitstreamShowBits(bs, 9), 256);
 
 	BitstreamSkip(bs, mcbpc_inter_table[index].len);
 
@@ -750,6 +778,10 @@
 		}
 		coeff += run;
 		block[scan[coeff]] = level;
+
+		DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level);
+		//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32));
+
 		if (level < -127 || level > 127) {
 			DEBUG1("warning: intra_overflow", level);
 		}
@@ -779,6 +811,10 @@
 		p += run;
 
 		block[scan[p]] = level;
+
+		DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level);
+		// DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32));
+
 		if (level < -127 || level > 127) {
 			DEBUG1("warning: inter_overflow", level);
 		}