--- decoder.c	2002/09/04 03:23:23	1.37
+++ decoder.c	2002/10/05 21:34:21	1.37.2.2
@@ -55,7 +55,7 @@
  *  22.12.2001  lock based interpolation
  *  01.12.2001  inital version; (c)2001 peter ross <pross@cs.rmit.edu.au>
  *
- *  $Id: decoder.c,v 1.37 2002/09/04 03:23:23 h Exp $
+ *  $Id: decoder.c,v 1.37.2.2 2002/10/05 21:34:21 Isibaar Exp $
  *
  *************************************************************************/
 
@@ -136,6 +136,15 @@
 		return XVID_ERR_MEMORY;
 	}
 
+	if (image_create(&dec->refh, dec->edged_width, dec->edged_height)) {
+		image_destroy(&dec->cur, dec->edged_width, dec->edged_height);
+		image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height);
+		image_destroy(&dec->refn[1], dec->edged_width, dec->edged_height);
+		image_destroy(&dec->refn[2], dec->edged_width, dec->edged_height);
+		xvid_free(dec);
+		return XVID_ERR_MEMORY;
+	}
+
 	dec->mbs =
 		xvid_malloc(sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height,
 					CACHE_LINE);
@@ -144,6 +153,7 @@
 		image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height);
 		image_destroy(&dec->refn[1], dec->edged_width, dec->edged_height);
 		image_destroy(&dec->refn[2], dec->edged_width, dec->edged_height);
+		image_destroy(&dec->refh, dec->edged_width, dec->edged_height);
 		xvid_free(dec);
 		return XVID_ERR_MEMORY;
 	}
@@ -161,6 +171,7 @@
 		image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height);
 		image_destroy(&dec->refn[1], dec->edged_width, dec->edged_height);
 		image_destroy(&dec->refn[2], dec->edged_width, dec->edged_height);
+		image_destroy(&dec->refh, dec->edged_width, dec->edged_height);
 		xvid_free(dec);
 		return XVID_ERR_MEMORY;
 	}
@@ -186,6 +197,7 @@
 	image_destroy(&dec->refn[0], dec->edged_width, dec->edged_height);
 	image_destroy(&dec->refn[1], dec->edged_width, dec->edged_height);
 	image_destroy(&dec->refn[2], dec->edged_width, dec->edged_height);
+	image_destroy(&dec->refh, dec->edged_width, dec->edged_height);
 	image_destroy(&dec->cur, dec->edged_width, dec->edged_height);
 	xvid_free(dec);
 
@@ -268,8 +280,10 @@
 		start_timer();
 		if (cbp & (1 << (5 - i)))	// coded
 		{
-			get_intra_block(bs, &block[i * 64], pMB->acpred_directions[i],
-							start_coeff);
+			int direction = dec->alternate_vertical_scan ?
+				2 : pMB->acpred_directions[i];
+
+			get_intra_block(bs, &block[i * 64], direction, start_coeff);
 		}
 		stop_coding_timer();
 
@@ -379,14 +393,17 @@
 
 	start_timer();
 	if(dec->quarterpel) {
-		DEBUG("QUARTERPEL");
-		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos,
+		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, dec->refh.y, dec->refh.y + 64,
+								  dec->refh.y + 128, 16*x_pos, 16*y_pos,
 								  pMB->mvs[0].x, pMB->mvs[0].y, stride,  rounding);
-		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos,
+		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, dec->refh.y, dec->refh.y + 64,
+								  dec->refh.y + 128, 16*x_pos + 8, 16*y_pos,
 								  pMB->mvs[1].x, pMB->mvs[1].y, stride,  rounding);
-		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos, 16*y_pos + 8,
+		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, dec->refh.y, dec->refh.y + 64,
+								  dec->refh.y + 128, 16*x_pos, 16*y_pos + 8,
 								  pMB->mvs[2].x, pMB->mvs[2].y, stride,  rounding);
-		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, 16*x_pos + 8, 16*y_pos + 8,
+		interpolate8x8_quarterpel(dec->cur.y, dec->refn[0].y, dec->refh.y, dec->refh.y + 64,
+								  dec->refh.y + 128, 16*x_pos + 8, 16*y_pos + 8,
 								  pMB->mvs[3].x, pMB->mvs[3].y, stride,  rounding);
 	}
 	else {
@@ -407,12 +424,14 @@
 	stop_comp_timer();
 
 	for (i = 0; i < 6; i++) {
+		int direction = dec->alternate_vertical_scan ? 2 : 0;
+
 		if (cbp & (1 << (5 - i)))	// coded
 		{
 			memset(&block[i * 64], 0, 64 * sizeof(int16_t));	// clear
 
 			start_timer();
-			get_inter_block(bs, &block[i * 64]);
+			get_inter_block(bs, &block[i * 64], direction);
 			stop_coding_timer();
 
 			start_timer();
@@ -585,7 +604,7 @@
 
 	start_timer();
 	image_setedges(&dec->refn[0], dec->edged_width, dec->edged_height,
-				   dec->width, dec->height, dec->interlacing);
+				   dec->width, dec->height);
 	stop_edges_timer();
 
 	bound = 0;
@@ -876,12 +895,14 @@
 	stop_comp_timer();
 
 	for (i = 0; i < 6; i++) {
+		int direction = dec->alternate_vertical_scan ? 2 : 0;
+
 		if (cbp & (1 << (5 - i)))	// coded
 		{
 			memset(&block[i * 64], 0, 64 * sizeof(int16_t));	// clear
 
 			start_timer();
-			get_inter_block(bs, &block[i * 64]);
+			get_inter_block(bs, &block[i * 64], direction);
 			stop_coding_timer();
 
 			start_timer();
@@ -1027,27 +1048,47 @@
 	interpolate8x8_switch(dec->refn[2].v, backward.v, 8 * x_pos, 8 * y_pos,
 						  b_uv_dx, b_uv_dy, stride2, 0);
 
-	interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos, 16 * y_pos,
-					 stride);
-	interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos + 8, 16 * y_pos,
-					 stride);
-	interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos, 16 * y_pos + 8,
-					 stride);
-	interpolate8x8_c(dec->cur.y, dec->refn[2].y, 16 * x_pos + 8,
-					 16 * y_pos + 8, stride);
-	interpolate8x8_c(dec->cur.u, dec->refn[2].u, 8 * x_pos, 8 * y_pos,
-					 stride2);
-	interpolate8x8_c(dec->cur.v, dec->refn[2].v, 8 * x_pos, 8 * y_pos,
-					 stride2);
+	interpolate8x8_avg2(dec->cur.y + (16 * y_pos * stride) + 16 * x_pos,
+						dec->cur.y + (16 * y_pos * stride) + 16 * x_pos,
+						dec->refn[2].y + (16 * y_pos * stride) + 16 * x_pos,
+						stride, 0);
+
+	interpolate8x8_avg2(dec->cur.y + (16 * y_pos * stride) + 16 * x_pos + 8,
+						dec->cur.y + (16 * y_pos * stride) + 16 * x_pos + 8,
+						dec->refn[2].y + (16 * y_pos * stride) + 16 * x_pos + 8,
+						stride, 0);
+
+	interpolate8x8_avg2(dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos,
+						dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos,
+						dec->refn[2].y + (16 * (y_pos + 8) * stride) + 16 * x_pos,
+						stride, 0);
+
+	interpolate8x8_avg2(dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8,
+						dec->cur.y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8,
+						dec->refn[2].y + (16 * (y_pos + 8) * stride) + 16 * x_pos + 8,
+						stride, 0);
+
+	interpolate8x8_avg2(dec->cur.u + (8 * y_pos * stride) + 8 * x_pos,
+						dec->cur.u + (8 * y_pos * stride) + 8 * x_pos,
+						dec->refn[2].u + (8 * y_pos * stride) + 8 * x_pos,
+						stride2, 0);
+
+	interpolate8x8_avg2(dec->cur.v + (8 * y_pos * stride) + 8 * x_pos,
+						dec->cur.v + (8 * y_pos * stride) + 8 * x_pos,
+						dec->refn[2].v + (8 * y_pos * stride) + 8 * x_pos,
+						stride2, 0);
+
 	stop_comp_timer();
 
 	for (i = 0; i < 6; i++) {
+		int direction = dec->alternate_vertical_scan ? 2 : 0;
+
 		if (cbp & (1 << (5 - i)))	// coded
 		{
 			memset(&block[i * 64], 0, 64 * sizeof(int16_t));	// clear
 
 			start_timer();
-			get_inter_block(bs, &block[i * 64]);
+			get_inter_block(bs, &block[i * 64], direction);
 			stop_coding_timer();
 
 			start_timer();
@@ -1142,9 +1183,9 @@
 
 	start_timer();
 	image_setedges(&dec->refn[0], dec->edged_width, dec->edged_height,
-				   dec->width, dec->height, dec->interlacing);
+				   dec->width, dec->height);
 	image_setedges(&dec->refn[1], dec->edged_width, dec->edged_height,
-				   dec->width, dec->height, dec->interlacing);
+				   dec->width, dec->height);
 	stop_edges_timer();
 
 #ifdef BFRAMES_DEC_DEBUG