--- mbtransquant.c	2002/03/08 02:44:58	1.1
+++ mbtransquant.c	2002/03/26 11:16:08	1.2
@@ -42,6 +42,7 @@
   *                                                                            *
   *  Revision history:                                                         *
   *                                                                            *
+  *  26.03.2002 interlacing support - moved transfers outside loops
   *  22.12.2001 get_dc_scaler() moved to common.h
   *  19.11.2001 introduced coefficient thresholding (Isibaar)                  *
   *  17.11.2001 initial version                                                *
@@ -68,6 +69,7 @@
 /* this isnt pretty, but its better than 20 ifdefs */
 
 void MBTransQuantIntra(const MBParam *pParam,
+			   MACROBLOCK * pMB,
 		       const uint32_t x_pos,
 		       const uint32_t y_pos,
 		       int16_t data[][64], 
@@ -83,33 +85,27 @@
     pY_Cur = pCurrent->y + (y_pos << 4) * stride + (x_pos << 4);
     pU_Cur = pCurrent->u + (y_pos << 3) * (stride >> 1) + (x_pos << 3);
     pV_Cur = pCurrent->v + (y_pos << 3) * (stride >> 1) + (x_pos << 3);
-    
-	for(i = 0; i < 6; i++) {
-		uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4);
 
-		start_timer();
-		
-		switch(i) {
-		case 0 :
-			transfer_8to16copy(data[0], pY_Cur, stride);
-			break;
-		case 1 :
-			transfer_8to16copy(data[1], pY_Cur + 8, stride);
-			break;
-		case 2 :
-		    transfer_8to16copy(data[2], pY_Cur + 8 * stride, stride);
-			break;
-		case 3 :
-			transfer_8to16copy(data[3], pY_Cur + 8 * stride + 8, stride);
-			break;
-		case 4 :
-			transfer_8to16copy(data[4], pU_Cur, stride / 2);
-			break;
-		case 5 :
-			transfer_8to16copy(data[5], pV_Cur, stride / 2);
-			break;
-		}
-		stop_transfer_timer();
+	start_timer();
+	transfer_8to16copy(data[0], pY_Cur, stride);
+	transfer_8to16copy(data[1], pY_Cur + 8, stride);
+    transfer_8to16copy(data[2], pY_Cur + 8 * stride, stride);
+	transfer_8to16copy(data[3], pY_Cur + 8 * stride + 8, stride);
+	transfer_8to16copy(data[4], pU_Cur, stride / 2);
+	transfer_8to16copy(data[5], pV_Cur, stride / 2);
+	stop_transfer_timer();
+
+	start_timer();
+	pMB->field_dct = 0;
+	if (pParam->global_flags & XVID_INTERLACING)
+	{
+		pMB->field_dct = MBDecideFieldDCT(data);
+	}
+	stop_interlacing_timer();
+
+	for(i = 0; i < 6; i++)
+	{
+		uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4);
 
 		start_timer();
 		fdct(data[i]);
@@ -139,35 +135,28 @@
 		start_timer();
 		idct(data[i]);
 		stop_idct_timer();
-
-		start_timer();
-		
-		switch(i) {
-		case 0:
-			transfer_16to8copy(pY_Cur, data[0], stride);
-			break;
-		case 1:
-			transfer_16to8copy(pY_Cur + 8, data[1], stride);
-			break;
-		case 2:
-			transfer_16to8copy(pY_Cur + 8 * stride, data[2], stride);
-			break;
-		case 3:
-			transfer_16to8copy(pY_Cur + 8 + 8 * stride, data[3], stride);
-			break;
-		case 4:
-			transfer_16to8copy(pU_Cur, data[4], stride / 2);
-			break;
-		case 5:
-			transfer_16to8copy(pV_Cur, data[5], stride / 2);
-			break;
-		}
-		stop_transfer_timer();
     }
+
+	start_timer();
+	if (pMB->field_dct)
+	{
+		MBFieldToFrame(data);
+	}
+	stop_interlacing_timer();
+
+	start_timer();
+	transfer_16to8copy(pY_Cur, data[0], stride);
+	transfer_16to8copy(pY_Cur + 8, data[1], stride);
+	transfer_16to8copy(pY_Cur + 8 * stride, data[2], stride);
+	transfer_16to8copy(pY_Cur + 8 + 8 * stride, data[3], stride);
+	transfer_16to8copy(pU_Cur, data[4], stride / 2);
+	transfer_16to8copy(pV_Cur, data[5], stride / 2);
+	stop_transfer_timer();
 }
 
 
 uint8_t MBTransQuantInter(const MBParam *pParam, 
+					MACROBLOCK * pMB,
 					const uint32_t x_pos, const uint32_t y_pos,
 					int16_t data[][64], 
 					int16_t qcoeff[][64], 
@@ -175,8 +164,8 @@
 
 {
 	const uint32_t stride = pParam->edged_width;
-    uint8_t i;
-    uint8_t iQuant = pParam->quant;
+    uint32_t i;
+    uint32_t iQuant = pParam->quant;
 	uint8_t *pY_Cur, *pU_Cur, *pV_Cur;
     uint8_t cbp = 0;
 	uint32_t sum;
@@ -185,7 +174,16 @@
     pU_Cur = pCurrent->u + (y_pos << 3) * (stride >> 1) + (x_pos << 3);
     pV_Cur = pCurrent->v + (y_pos << 3) * (stride >> 1) + (x_pos << 3);
 
-    for(i = 0; i < 6; i++) {
+	start_timer();
+	pMB->field_dct = 0;
+	if (pParam->global_flags & XVID_INTERLACING)
+	{
+		pMB->field_dct = MBDecideFieldDCT(data);
+	}
+	stop_interlacing_timer();
+
+    for(i = 0; i < 6; i++)
+	{
 		/* 
 		no need to transfer 8->16-bit
 		(this is performed already in motion compensation) 
@@ -227,31 +225,198 @@
 			start_timer();
 			idct(data[i]);
 			stop_idct_timer();
-
-			start_timer();
-			
-			switch(i) {
-			case 0:
-				transfer_16to8add(pY_Cur, data[0], stride);
-				break;
-			case 1:
-				transfer_16to8add(pY_Cur + 8, data[1], stride);
-				break;
-			case 2:
-				transfer_16to8add(pY_Cur + 8 * stride, data[2], stride);
-				break;
-			case 3:
-				transfer_16to8add(pY_Cur + 8 + 8 * stride, data[3], stride);
-				break;
-			case 4:
-				transfer_16to8add(pU_Cur, data[4], stride / 2);
-				break;
-			case 5:
-				transfer_16to8add(pV_Cur, data[5], stride / 2);
-				break;
-			}
-			stop_transfer_timer();
 		}
 	}
+
+	start_timer();
+	if (pMB->field_dct)
+	{
+		MBFieldToFrame(data);
+	}
+	stop_interlacing_timer();
+
+	start_timer();
+	if (cbp & 32)
+		transfer_16to8add(pY_Cur, data[0], stride);
+	if (cbp & 16)
+		transfer_16to8add(pY_Cur + 8, data[1], stride);
+	if (cbp & 8)
+		transfer_16to8add(pY_Cur + 8 * stride, data[2], stride);
+	if (cbp & 4)
+		transfer_16to8add(pY_Cur + 8 + 8 * stride, data[3], stride);
+	if (cbp & 2)
+		transfer_16to8add(pU_Cur, data[4], stride / 2);
+	if (cbp & 1)
+		transfer_16to8add(pV_Cur, data[5], stride / 2);
+	stop_transfer_timer();
+
     return cbp;
 }
+
+
+/* if sum(diff between field lines) < sum(diff between frame lines), use field dct */
+
+#define ABS(X) (X)<0 ? -(X) : (X)
+
+uint32_t MBDecideFieldDCT(int16_t data[][64])
+{
+	const uint8_t blocks[] = {0, 0, 0, 0, 2, 2, 2, 2};
+	const uint8_t lines[] = {0, 16, 32, 48, 0, 16, 32, 48};
+
+	int frame = 0, field = 0;
+	int i, j;
+
+	for (i=0 ; i<7 ; ++i)
+	{
+		for (j=0 ; j<8 ; ++j)
+		{
+			frame += ABS(data[0][(i+1)*8 + j] - data[0][i*8 + j]);
+			frame += ABS(data[1][(i+1)*8 + j] - data[1][i*8 + j]);
+			frame += ABS(data[2][(i+1)*8 + j] - data[2][i*8 + j]);
+			frame += ABS(data[3][(i+1)*8 + j] - data[3][i*8 + j]);
+
+			field += ABS(data[blocks[i+1]][lines[i+1] + j] - data[blocks[i]][lines[i] + j]);
+			field += ABS(data[blocks[i+1]][lines[i+1] + 8 + j] - data[blocks[i]][lines[i] + 8 + j]);
+			field += ABS(data[blocks[i+1]+1][lines[i+1] + j] - data[blocks[i]+1][lines[i] + j]);
+			field += ABS(data[blocks[i+1]+1][lines[i+1] + 8 + j] - data[blocks[i]+1][lines[i] + 8 + j]);
+		}
+	}
+
+	if (frame > field)
+	{
+		MBFrameToField(data);
+	}
+
+	return (frame > field);
+}
+
+
+/* deinterlace Y blocks vertically */
+
+#define MOVLINE(X,Y) memcpy(X, Y, sizeof(tmp))
+#define LINE(X,Y) &data[X][Y*8]
+
+void MBFrameToField(int16_t data[][64])
+{
+	int16_t tmp[8];
+
+	/* left blocks */
+
+	// 1=2, 2=4, 4=8, 8=1
+	MOVLINE(tmp,		LINE(0,1));
+	MOVLINE(LINE(0,1),	LINE(0,2));
+	MOVLINE(LINE(0,2),	LINE(0,4));
+	MOVLINE(LINE(0,4),	LINE(2,0));
+	MOVLINE(LINE(2,0),	tmp);
+
+	// 3=6, 6=12, 12=9, 9=3
+	MOVLINE(tmp,		LINE(0,3));
+	MOVLINE(LINE(0,3),	LINE(0,6));
+	MOVLINE(LINE(0,6),	LINE(2,4));
+	MOVLINE(LINE(2,4),	LINE(2,1));
+	MOVLINE(LINE(2,1),	tmp);
+
+	// 5=10, 10=5
+	MOVLINE(tmp,		LINE(0,5));
+	MOVLINE(LINE(0,5),	LINE(2,2));
+	MOVLINE(LINE(2,2),	tmp);
+
+	// 7=14, 14=13, 13=11, 11=7
+	MOVLINE(tmp,		LINE(0,7));
+	MOVLINE(LINE(0,7),	LINE(2,6));
+	MOVLINE(LINE(2,6),	LINE(2,5));
+	MOVLINE(LINE(2,5),	LINE(2,3));
+	MOVLINE(LINE(2,3),	tmp);
+
+	/* right blocks */
+
+	// 1=2, 2=4, 4=8, 8=1
+	MOVLINE(tmp,		LINE(1,1));
+	MOVLINE(LINE(1,1),	LINE(1,2));
+	MOVLINE(LINE(1,2),	LINE(1,4));
+	MOVLINE(LINE(1,4),	LINE(3,0));
+	MOVLINE(LINE(3,0),	tmp);
+
+	// 3=6, 6=12, 12=9, 9=3
+	MOVLINE(tmp,		LINE(1,3));
+	MOVLINE(LINE(1,3),	LINE(1,6));
+	MOVLINE(LINE(1,6),	LINE(3,4));
+	MOVLINE(LINE(3,4),	LINE(3,1));
+	MOVLINE(LINE(3,1),	tmp);
+
+	// 5=10, 10=5
+	MOVLINE(tmp,		LINE(1,5));
+	MOVLINE(LINE(1,5),	LINE(3,2));
+	MOVLINE(LINE(3,2),	tmp);
+
+	// 7=14, 14=13, 13=11, 11=7
+	MOVLINE(tmp,		LINE(1,7));
+	MOVLINE(LINE(1,7),	LINE(3,6));
+	MOVLINE(LINE(3,6),	LINE(3,5));
+	MOVLINE(LINE(3,5),	LINE(3,3));
+	MOVLINE(LINE(3,3),	tmp);
+}
+
+
+/* interlace Y blocks vertically */
+
+void MBFieldToFrame(int16_t data[][64])
+{
+	uint16_t tmp[8];
+
+	/* left blocks */
+
+	// 1=8, 8=4, 4=2, 2=1
+	MOVLINE(tmp,		LINE(0,1));
+	MOVLINE(LINE(0,1),	LINE(2,0));
+	MOVLINE(LINE(2,0),	LINE(0,4));
+	MOVLINE(LINE(0,4),	LINE(0,2));
+	MOVLINE(LINE(0,2),	tmp);
+
+	// 3=9, 9=12, 12=6, 6=3
+	MOVLINE(tmp,		LINE(0,3));
+	MOVLINE(LINE(0,3),	LINE(2,1));
+	MOVLINE(LINE(2,1),	LINE(2,4));
+	MOVLINE(LINE(2,4),	LINE(0,6));
+	MOVLINE(LINE(0,6),	tmp);
+
+	// 5=10, 10=5
+	MOVLINE(tmp,		LINE(0,5));
+	MOVLINE(LINE(0,5),	LINE(2,2));
+	MOVLINE(LINE(2,2),	tmp);
+
+	// 7=11, 11=13, 13=14, 14=7
+	MOVLINE(tmp,		LINE(0,7));
+	MOVLINE(LINE(0,7),	LINE(2,3));
+	MOVLINE(LINE(2,3),	LINE(2,5));
+	MOVLINE(LINE(2,5),	LINE(2,6));
+	MOVLINE(LINE(2,6),	tmp);
+
+	/* right blocks */
+
+	// 1=8, 8=4, 4=2, 2=1
+	MOVLINE(tmp,		LINE(1,1));
+	MOVLINE(LINE(1,1),	LINE(3,0));
+	MOVLINE(LINE(3,0),	LINE(1,4));
+	MOVLINE(LINE(1,4),	LINE(1,2));
+	MOVLINE(LINE(1,2),	tmp);
+
+	// 3=9, 9=12, 12=6, 6=3
+	MOVLINE(tmp,		LINE(1,3));
+	MOVLINE(LINE(1,3),	LINE(3,1));
+	MOVLINE(LINE(3,1),	LINE(3,4));
+	MOVLINE(LINE(3,4),	LINE(1,6));
+	MOVLINE(LINE(1,6),	tmp);
+
+	// 5=10, 10=5
+	MOVLINE(tmp,		LINE(1,5));
+	MOVLINE(LINE(1,5),	LINE(3,2));
+	MOVLINE(LINE(3,2),	tmp);
+
+	// 7=11, 11=13, 13=14, 14=7
+	MOVLINE(tmp,		LINE(1,7));
+	MOVLINE(LINE(1,7),	LINE(3,3));
+	MOVLINE(LINE(3,3),	LINE(3,5));
+	MOVLINE(LINE(3,5),	LINE(3,6));
+	MOVLINE(LINE(3,6),	tmp);
+}