--- trunk/xvidcore/src/bitstream/mbcoding.c	2004/12/08 12:43:48	1567
+++ branches/release-1_1-branch/xvidcore/src/bitstream/mbcoding.c	2007/06/27 18:57:42	1776
@@ -19,7 +19,7 @@
  *  along with this program ; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  *
- * $Id: mbcoding.c,v 1.49 2004-12-08 12:43:48 syskin Exp $
+ * $Id: mbcoding.c,v 1.52.2.1 2007-06-27 18:57:42 Isibaar Exp $
  *
  ****************************************************************************/
 
@@ -606,6 +606,12 @@
 	if (frame->coding_type != I_VOP)
 			BitstreamPutBit(bs, 0);	/* not_coded */
 
+	if (frame->vop_flags & XVID_VOP_GREYSCALE) {
+		pMB->cbp &= 0x3C;		/* keep only bits 5-2 */
+		qcoeff[4*64+0]=0;		/* for INTRA DC value is saved */
+		qcoeff[5*64+0]=0;
+	}
+
 	if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q)
 		CodeBlockIntra(frame, pMB, qcoeff, bs, pStat);
 	else
@@ -692,7 +698,6 @@
 		scan_tables[2] : scan_tables[0];
 	int bits;
 
-
 /*	------------------------------------------------------------------
 		when a block is skipped it is decoded DIRECT(0,0)
 		hence is interpolated from forward & backward frames
@@ -1062,11 +1067,12 @@
 
 	do {
 		level = get_coeff(bs, &run, &last, 1, 0);
-		if (run == -1) {
-			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
+		coeff += run;
+		if ((run|coeff)&~63) {
+			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
 			break;
 		}
-		coeff += run;
+		
 		block[scan[coeff]] = level;
 
 		DPRINTF(XVID_DEBUG_COEFF,"block[%i] %i\n", scan[coeff], level);
@@ -1102,11 +1108,11 @@
 	p = 0;
 	do {
 		level = get_coeff(bs, &run, &last, 0, 0);
-		if (run == -1) {
-			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
+		p += run;
+		if ((run|p)&~63) {
+			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
 			break;
 		}
-		p += run;
 
 		if (level < 0) {
 			level = level*quant_m_2 - quant_add;
@@ -1137,11 +1143,11 @@
 	p = 0;
 	do {
 		level = get_coeff(bs, &run, &last, 0, 0);
-		if (run == -1) {
-			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run");
+		p += run;
+		if ((run|p)&~63) {
+			DPRINTF(XVID_DEBUG_ERROR,"fatal: invalid run or index");
 			break;
 		}
-		p += run;
 
 		if (level < 0) {
 			level = ((2 * -level + 1) * matrix[scan[p]] * quant) >> 4;
@@ -1939,14 +1945,14 @@
 };
 
 short const dc_threshold[] = {
-	21514, 26984,  8307, 28531, 29798, 24951, 25970, 26912,
-	 8307, 25956, 26994, 25974,  8292, 29286, 28015, 29728,
-	25960, 18208, 21838, 18208, 19536, 22560, 26998,  8260,
-	28515, 25956,  8291, 25640, 30309, 27749, 11817, 22794,
-	30063,  8306, 28531, 29798, 24951, 25970, 25632, 29545,
-	29300, 25193, 29813, 29295, 26656, 29537, 29728,  8303,
-	26983, 25974, 24864, 25443, 29541,  8307, 28532, 26912,
-	29556, 29472, 30063, 25458,  8293, 28515, 25956,  2606
+	26708, 29545, 29472, 26223, 30580, 29281,  8293, 29545,
+	25632, 29285, 30313, 25701, 26144, 28530,  8301, 26740,
+	 8293, 20039,  8277, 20551,  8268, 30296, 17513, 25376,
+	25711, 25445, 10272, 11825, 11825, 10544,  2606, 28505,
+	29301, 29472, 26223, 30580, 29281,  8293, 26980, 29811,
+	26994, 30050, 28532,  8306, 24936,  8307, 28532, 26400,
+	30313,  8293, 25441, 25955, 29555, 29728,  8303, 29801,
+	 8307, 28531, 29301, 25955, 25376, 25711, 11877,    10
 };
 
 VLC const dc_lum_tab[] = {