--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/ps3/spulibs/bilin_scaler.c	Fri Jun 19 05:22:00 2009 +0000
@@ -0,0 +1,2050 @@
+/*
+ * SDL - Simple DirectMedia Layer
+ * CELL BE Support for PS3 Framebuffer
+ * Copyright (C) 2008, 2009 International Business Machines Corporation
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+ * USA
+ *
+ *  Martin Lowinski  <lowinski [at] de [dot] ibm [ibm] com>
+ *  Dirk Herrendoerfer <d.herrendoerfer [at] de [dot] ibm [dot] com>
+ *  SPE code based on research by:
+ *  Rene Becker
+ *  Thimo Emmerich
+ */
+
+#include "spu_common.h"
+
+#include <spu_intrinsics.h>
+#include <spu_mfcio.h>
+
+// Debugging
+//#define DEBUG
+
+#ifdef DEBUG
+#define deprintf(fmt, args... ) \
+	fprintf( stdout, fmt, ##args ); \
+	fflush( stdout );
+#else
+#define deprintf( fmt, args... )
+#endif
+
+struct scale_parms_t parms __attribute__((aligned(128)));
+
+/* A maximum of 8 lines Y, therefore 4 lines V, 4 lines U are stored
+ * there might be the need to retrieve misaligned data, adjust
+ * incoming v and u plane to be able to handle this (add 128)
+ */
+unsigned char y_plane[2][(MAX_HDTV_WIDTH+128)*4] __attribute__((aligned(128)));
+unsigned char v_plane[2][(MAX_HDTV_WIDTH+128)*2] __attribute__((aligned(128)));
+unsigned char u_plane[2][(MAX_HDTV_WIDTH+128)*2] __attribute__((aligned(128)));
+
+/* temp-buffer for scaling: 4 lines Y, therefore 2 lines V, 2 lines U */
+unsigned char scaled_y_plane[2][MAX_HDTV_WIDTH*2] __attribute__((aligned(128)));
+unsigned char scaled_v_plane[2][MAX_HDTV_WIDTH/2] __attribute__((aligned(128)));
+unsigned char scaled_u_plane[2][MAX_HDTV_WIDTH/2] __attribute__((aligned(128)));
+
+/* some vectors needed by the float to int conversion */
+static const vector float vec_255 = { 255.0f, 255.0f, 255.0f, 255.0f };
+static const vector float vec_0_1 = { 0.1f, 0.1f, 0.1f, 0.1f };
+
+void bilinear_scale_line_w8(unsigned char* src, unsigned char* dst_, unsigned int dst_width, vector float vf_x_scale, vector float vf_NSweight, unsigned int src_linestride);
+void bilinear_scale_line_w16(unsigned char* src, unsigned char* dst_, unsigned int dst_width, vector float vf_x_scale, vector float vf_NSweight, unsigned int src_linestride);
+
+void scale_srcw16_dstw16();
+void scale_srcw16_dstw32();
+void scale_srcw32_dstw16();
+void scale_srcw32_dstw32();
+
+int main( unsigned long long spe_id __attribute__((unused)), unsigned long long argp )
+{
+	deprintf("[SPU] bilin_scaler_spu is up... (on SPE #%llu)\n", spe_id);
+	/* DMA transfer for the input parameters */
+	spu_mfcdma32(&parms, (unsigned int)argp, sizeof(struct scale_parms_t), TAG_INIT, MFC_GET_CMD);
+	DMA_WAIT_TAG(TAG_INIT);
+
+	deprintf("[SPU] Scale %ux%u to %ux%u\n", parms.src_pixel_width, parms.src_pixel_height,
+			parms.dst_pixel_width, parms.dst_pixel_height);
+
+	if(parms.src_pixel_width & 0x1f) {
+		if(parms.dst_pixel_width & 0x1F) {
+			deprintf("[SPU] Using scale_srcw16_dstw16\n");
+			scale_srcw16_dstw16();
+		} else {
+			deprintf("[SPU] Using scale_srcw16_dstw32\n");
+			scale_srcw16_dstw32();
+		}
+	} else {
+		if(parms.dst_pixel_width & 0x1F) {
+			deprintf("[SPU] Using scale_srcw32_dstw16\n");
+			scale_srcw32_dstw16();
+		} else {
+			deprintf("[SPU] Using scale_srcw32_dstw32\n");
+			scale_srcw32_dstw32();
+		}
+	}
+	deprintf("[SPU] bilin_scaler_spu... done!\n");
+
+	return 0;
+}
+
+
+/*
+ * vfloat_to_vuint()
+ *
+ * converts a float vector to an unsinged int vector using saturated
+ * arithmetic
+ *
+ * @param vec_s float vector for conversion
+ * @returns converted unsigned int vector
+ */
+inline static vector unsigned int vfloat_to_vuint(vector float vec_s) {
+	vector unsigned int select_1 = spu_cmpgt(vec_0_1, vec_s);
+	vec_s = spu_sel(vec_s, vec_0_1, select_1);
+
+	vector unsigned int select_2 = spu_cmpgt(vec_s, vec_255);
+	vec_s = spu_sel(vec_s, vec_255, select_2);
+	return spu_convtu(vec_s,0);
+}
+
+
+/*
+ * scale_srcw16_dstw16()
+ *
+ * processes an input image of width 16
+ * scaling is done to a width 16
+ * result stored in RAM
+ */
+void scale_srcw16_dstw16() {
+	// extract parameters
+	unsigned char* dst_addr = (unsigned char *)parms.dstBuffer;
+
+	unsigned int src_width = parms.src_pixel_width;
+	unsigned int src_height = parms.src_pixel_height;
+	unsigned int dst_width = parms.dst_pixel_width;
+	unsigned int dst_height = parms.dst_pixel_height;
+
+	// YVU
+	unsigned int src_linestride_y = src_width;
+	unsigned int src_dbl_linestride_y = src_width<<1;
+	unsigned int src_linestride_vu = src_width>>1;
+	unsigned int src_dbl_linestride_vu = src_width;
+
+	// scaled YVU
+	unsigned int scaled_src_linestride_y = dst_width;
+
+	// ram addresses
+	unsigned char* src_addr_y = parms.y_plane;
+	unsigned char* src_addr_v = parms.v_plane;
+	unsigned char* src_addr_u = parms.u_plane;
+
+	// for handling misalignment, addresses are precalculated
+	unsigned char* precalc_src_addr_v = src_addr_v;
+	unsigned char* precalc_src_addr_u = src_addr_u;
+
+	unsigned int dst_picture_size = dst_width*dst_height;
+
+	// Sizes for destination
+	unsigned int dst_dbl_linestride_y = dst_width<<1;
+	unsigned int dst_dbl_linestride_vu = dst_width>>1;
+
+	// Perform address calculation for Y, V and U in main memory with dst_addr as base
+	unsigned char* dst_addr_main_memory_y = dst_addr;
+	unsigned char* dst_addr_main_memory_v = dst_addr + dst_picture_size;
+	unsigned char* dst_addr_main_memory_u = dst_addr_main_memory_v +(dst_picture_size>>2);
+
+	// calculate scale factors
+	vector float vf_x_scale = spu_splats( (float)src_width/(float)dst_width );
+	float y_scale = (float)src_height/(float)dst_height;
+
+	// double buffered processing
+	// buffer switching
+	unsigned int curr_src_idx = 0;
+	unsigned int curr_dst_idx = 0;
+	unsigned int next_src_idx, next_dst_idx;
+
+	// 2 lines y as output, upper and lowerline
+	unsigned int curr_interpl_y_upper = 0;
+	unsigned int next_interpl_y_upper;
+	unsigned int curr_interpl_y_lower, next_interpl_y_lower;
+	// only 1 line v/u output, both planes have the same dimension
+	unsigned int curr_interpl_vu = 0;
+	unsigned int next_interpl_vu;
+
+	// weights, calculated in every loop iteration
+	vector float vf_curr_NSweight_y_upper = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_y_upper;
+	vector float vf_curr_NSweight_y_lower, vf_next_NSweight_y_lower;
+	vector float vf_curr_NSweight_vu = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_vu;
+
+	// line indices for the src picture
+	float curr_src_y_upper = 0.0f, next_src_y_upper;
+	float curr_src_y_lower, next_src_y_lower;
+	float curr_src_vu = 0.0f, next_src_vu;
+
+	// line indices for the dst picture
+	unsigned int dst_y=0, dst_vu=0;
+
+	// offset for the v and u plane to handle misalignement
+	unsigned int curr_lsoff_v = 0, next_lsoff_v;
+	unsigned int curr_lsoff_u = 0, next_lsoff_u;
+
+	// calculate lower line indices
+	curr_src_y_lower = ((float)curr_interpl_y_upper+1)*y_scale;
+	curr_interpl_y_lower = (unsigned int)curr_src_y_lower;
+	// lower line weight
+	vf_curr_NSweight_y_lower = spu_splats( curr_src_y_lower-(float)curr_interpl_y_lower );
+
+
+	// start partially double buffered processing
+	// get initial data, 2 sets of y, 1 set v, 1 set u
+	mfc_get( y_plane[curr_src_idx], (unsigned int) src_addr_y, src_dbl_linestride_y, RETR_BUF, 0, 0 );
+	mfc_get( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			(unsigned int) src_addr_y+(curr_interpl_y_lower*src_linestride_y),
+			src_dbl_linestride_y,
+			RETR_BUF,
+			0, 0 );
+	mfc_get( v_plane[curr_src_idx], (unsigned int) src_addr_v, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+	mfc_get( u_plane[curr_src_idx], (unsigned int) src_addr_u, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+
+	/* iteration loop
+	 * within each iteration 4 lines y, 2 lines v, 2 lines u are retrieved
+	 * the scaled output is 2 lines y, 1 line v, 1 line u
+	 * the yuv2rgb-converted output is stored to RAM
+	 */
+	for( dst_vu=0; dst_vu<(dst_height>>1)-1; dst_vu++ ) {
+		dst_y = dst_vu<<1;
+
+		// calculate next indices
+		next_src_vu = ((float)dst_vu+1)*y_scale;
+		next_src_y_upper = ((float)dst_y+2)*y_scale;
+		next_src_y_lower = ((float)dst_y+3)*y_scale;
+
+		next_interpl_vu = (unsigned int) next_src_vu;
+		next_interpl_y_upper = (unsigned int) next_src_y_upper;
+		next_interpl_y_lower = (unsigned int) next_src_y_lower;
+
+		// calculate weight NORTH-SOUTH
+		vf_next_NSweight_vu = spu_splats( next_src_vu-(float)next_interpl_vu );
+		vf_next_NSweight_y_upper = spu_splats( next_src_y_upper-(float)next_interpl_y_upper );
+		vf_next_NSweight_y_lower = spu_splats( next_src_y_lower-(float)next_interpl_y_lower );
+
+		// get next lines
+		next_src_idx = curr_src_idx^1;
+		next_dst_idx = curr_dst_idx^1;
+
+		// 4 lines y
+		mfc_get( y_plane[next_src_idx],
+				(unsigned int) src_addr_y+(next_interpl_y_upper*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		mfc_get( y_plane[next_src_idx]+src_dbl_linestride_y,
+				(unsigned int) src_addr_y+(next_interpl_y_lower*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		// 2 lines v
+		precalc_src_addr_v = src_addr_v+(next_interpl_vu*src_linestride_vu);
+		next_lsoff_v = ((unsigned int)precalc_src_addr_v)&0x0F;
+		mfc_get( v_plane[next_src_idx],
+				((unsigned int) precalc_src_addr_v)&0xFFFFFFF0,
+				src_dbl_linestride_vu+(next_lsoff_v<<1),
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		// 2 lines u
+		precalc_src_addr_u = src_addr_u+(next_interpl_vu*src_linestride_vu);
+		next_lsoff_u = ((unsigned int)precalc_src_addr_u)&0x0F;
+		mfc_get( u_plane[next_src_idx],
+				((unsigned int) precalc_src_addr_u)&0xFFFFFFF0,
+				src_dbl_linestride_vu+(next_lsoff_v<<1),
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+		// scaling
+		// work line y_upper
+		bilinear_scale_line_w16( y_plane[curr_src_idx],
+				scaled_y_plane[curr_src_idx],
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_upper,
+				src_linestride_y );
+		// work line y_lower
+		bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+				scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_lower,
+				src_linestride_y );
+		// work line v
+		bilinear_scale_line_w8( v_plane[curr_src_idx]+curr_lsoff_v,
+				scaled_v_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+		// work line u
+		bilinear_scale_line_w8( u_plane[curr_src_idx]+curr_lsoff_u,
+				scaled_u_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+
+
+		// Store the result back to main memory into a destination buffer in YUV format
+		//---------------------------------------------------------------------------------------------
+		DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+		// Perform three DMA transfers to 3 different locations in the main memory!
+		// dst_width:	Pixel width of destination image
+		// dst_addr:	Destination address in main memory
+		// dst_vu:	Counter which is incremented one by one
+		// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+		mfc_put(	scaled_y_plane[curr_src_idx],					// What from local store (addr)
+				(unsigned int)dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+				dst_dbl_linestride_y,						// Two Y lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,						// Tag
+				0, 0 );
+
+		mfc_put(	scaled_v_plane[curr_src_idx],					// What from local store (addr)
+				(unsigned int)dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,						// Two V lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,						// Tag
+				0, 0 );
+
+		mfc_put(	scaled_u_plane[curr_src_idx],					// What from local store (addr)
+				(unsigned int)dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,						// Two U lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,						// Tag
+				0, 0 );
+		//---------------------------------------------------------------------------------------------
+
+
+		// update for next cycle
+		curr_src_idx = next_src_idx;
+		curr_dst_idx = next_dst_idx;
+
+		curr_interpl_y_upper = next_interpl_y_upper;
+		curr_interpl_y_lower = next_interpl_y_lower;
+		curr_interpl_vu = next_interpl_vu;
+
+		vf_curr_NSweight_y_upper = vf_curr_NSweight_y_upper;
+		vf_curr_NSweight_y_lower = vf_curr_NSweight_y_lower;
+		vf_curr_NSweight_vu = vf_next_NSweight_vu;
+
+		curr_src_y_upper = next_src_y_upper;
+		curr_src_y_lower = next_src_y_lower;
+		curr_src_vu = next_src_vu;
+
+		curr_lsoff_v = next_lsoff_v;
+		curr_lsoff_u = next_lsoff_u;
+	}
+
+
+
+	DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+	// scaling
+	// work line y_upper
+	bilinear_scale_line_w16( y_plane[curr_src_idx],
+			scaled_y_plane[curr_src_idx],
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_upper,
+			src_linestride_y );
+	// work line y_lower
+	bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_lower,
+			src_linestride_y );
+	// work line v
+	bilinear_scale_line_w8( v_plane[curr_src_idx]+curr_lsoff_v,
+			scaled_v_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+	// work line u
+	bilinear_scale_line_w8( u_plane[curr_src_idx]+curr_lsoff_u,
+			scaled_u_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+
+
+	// Store the result back to main memory into a destination buffer in YUV format
+	//---------------------------------------------------------------------------------------------
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+	// Perform three DMA transfers to 3 different locations in the main memory!
+	// dst_width:	Pixel width of destination image
+	// dst_addr:	Destination address in main memory
+	// dst_vu:	Counter which is incremented one by one
+	// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+	mfc_put(	scaled_y_plane[curr_src_idx],					// What from local store (addr)
+			(unsigned int)dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+			dst_dbl_linestride_y,						// Two Y lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,						// Tag
+			0, 0 );
+
+	mfc_put(	scaled_v_plane[curr_src_idx],					// What from local store (addr)
+			(unsigned int)dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,						// Two V lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,						// Tag
+			0, 0 );
+
+	mfc_put(	scaled_u_plane[curr_src_idx],					// What from local store (addr)
+			(unsigned int)dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,						// Two U lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,						// Tag
+			0, 0 );
+
+	// wait for completion
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+	//---------------------------------------------------------------------------------------------
+}
+
+
+/*
+ * scale_srcw16_dstw32()
+ *
+ * processes an input image of width 16
+ * scaling is done to a width 32
+ * yuv2rgb conversion on a width of 32
+ * result stored in RAM
+ */
+void scale_srcw16_dstw32() {
+	// extract parameters
+	unsigned char* dst_addr = (unsigned char *)parms.dstBuffer;
+
+	unsigned int src_width = parms.src_pixel_width;
+	unsigned int src_height = parms.src_pixel_height;
+	unsigned int dst_width = parms.dst_pixel_width;
+	unsigned int dst_height = parms.dst_pixel_height;
+
+	// YVU
+	unsigned int src_linestride_y = src_width;
+	unsigned int src_dbl_linestride_y = src_width<<1;
+	unsigned int src_linestride_vu = src_width>>1;
+	unsigned int src_dbl_linestride_vu = src_width;
+	// scaled YVU
+	unsigned int scaled_src_linestride_y = dst_width;
+
+	// ram addresses
+	unsigned char* src_addr_y = parms.y_plane;
+	unsigned char* src_addr_v = parms.v_plane;
+	unsigned char* src_addr_u = parms.u_plane;
+
+	unsigned int dst_picture_size = dst_width*dst_height;
+
+	// Sizes for destination
+	unsigned int dst_dbl_linestride_y = dst_width<<1;
+	unsigned int dst_dbl_linestride_vu = dst_width>>1;
+
+	// Perform address calculation for Y, V and U in main memory with dst_addr as base
+	unsigned char* dst_addr_main_memory_y = dst_addr;
+	unsigned char* dst_addr_main_memory_v = dst_addr + dst_picture_size;
+	unsigned char* dst_addr_main_memory_u = dst_addr_main_memory_v +(dst_picture_size>>2);
+
+
+	// for handling misalignment, addresses are precalculated
+	unsigned char* precalc_src_addr_v = src_addr_v;
+	unsigned char* precalc_src_addr_u = src_addr_u;
+
+	// calculate scale factors
+	vector float vf_x_scale = spu_splats( (float)src_width/(float)dst_width );
+	float y_scale = (float)src_height/(float)dst_height;
+
+	// double buffered processing
+	// buffer switching
+	unsigned int curr_src_idx = 0;
+	unsigned int curr_dst_idx = 0;
+	unsigned int next_src_idx, next_dst_idx;
+
+	// 2 lines y as output, upper and lowerline
+	unsigned int curr_interpl_y_upper = 0;
+	unsigned int next_interpl_y_upper;
+	unsigned int curr_interpl_y_lower, next_interpl_y_lower;
+	// only 1 line v/u output, both planes have the same dimension
+	unsigned int curr_interpl_vu = 0;
+	unsigned int next_interpl_vu;
+
+	// weights, calculated in every loop iteration
+	vector float vf_curr_NSweight_y_upper = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_y_upper;
+	vector float vf_curr_NSweight_y_lower, vf_next_NSweight_y_lower;
+	vector float vf_curr_NSweight_vu = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_vu;
+
+	// line indices for the src picture
+	float curr_src_y_upper = 0.0f, next_src_y_upper;
+	float curr_src_y_lower, next_src_y_lower;
+	float curr_src_vu = 0.0f, next_src_vu;
+
+	// line indices for the dst picture
+	unsigned int dst_y=0, dst_vu=0;
+
+	// offset for the v and u plane to handle misalignement
+	unsigned int curr_lsoff_v = 0, next_lsoff_v;
+	unsigned int curr_lsoff_u = 0, next_lsoff_u;
+
+	// calculate lower line idices
+	curr_src_y_lower = ((float)curr_interpl_y_upper+1)*y_scale;
+	curr_interpl_y_lower = (unsigned int)curr_src_y_lower;
+	// lower line weight
+	vf_curr_NSweight_y_lower = spu_splats( curr_src_y_lower-(float)curr_interpl_y_lower );
+
+
+	// start partially double buffered processing
+	// get initial data, 2 sets of y, 1 set v, 1 set u
+	mfc_get( y_plane[curr_src_idx], (unsigned int) src_addr_y, src_dbl_linestride_y, RETR_BUF, 0, 0 );
+	mfc_get( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			(unsigned int) src_addr_y+(curr_interpl_y_lower*src_linestride_y),
+			src_dbl_linestride_y,
+			RETR_BUF,
+			0, 0 );
+	mfc_get( v_plane[curr_src_idx], (unsigned int) src_addr_v, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+	mfc_get( u_plane[curr_src_idx], (unsigned int) src_addr_u, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+
+	// iteration loop
+	// within each iteration 4 lines y, 2 lines v, 2 lines u are retrieved
+	// the scaled output is 2 lines y, 1 line v, 1 line u
+	// the yuv2rgb-converted output is stored to RAM
+	for( dst_vu=0; dst_vu<(dst_height>>1)-1; dst_vu++ ) {
+		dst_y = dst_vu<<1;
+
+		// calculate next indices
+		next_src_vu = ((float)dst_vu+1)*y_scale;
+		next_src_y_upper = ((float)dst_y+2)*y_scale;
+		next_src_y_lower = ((float)dst_y+3)*y_scale;
+
+		next_interpl_vu = (unsigned int) next_src_vu;
+		next_interpl_y_upper = (unsigned int) next_src_y_upper;
+		next_interpl_y_lower = (unsigned int) next_src_y_lower;
+
+		// calculate weight NORTH-SOUTH
+		vf_next_NSweight_vu = spu_splats( next_src_vu-(float)next_interpl_vu );
+		vf_next_NSweight_y_upper = spu_splats( next_src_y_upper-(float)next_interpl_y_upper );
+		vf_next_NSweight_y_lower = spu_splats( next_src_y_lower-(float)next_interpl_y_lower );
+
+		// get next lines
+		next_src_idx = curr_src_idx^1;
+		next_dst_idx = curr_dst_idx^1;
+
+		// 4 lines y
+		mfc_get( y_plane[next_src_idx],
+				(unsigned int) src_addr_y+(next_interpl_y_upper*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		mfc_get( y_plane[next_src_idx]+src_dbl_linestride_y,
+				(unsigned int) src_addr_y+(next_interpl_y_lower*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		// 2 lines v
+		precalc_src_addr_v = src_addr_v+(next_interpl_vu*src_linestride_vu);
+		next_lsoff_v = ((unsigned int)precalc_src_addr_v)&0x0F;
+		mfc_get( v_plane[next_src_idx],
+				((unsigned int) precalc_src_addr_v)&0xFFFFFFF0,
+				src_dbl_linestride_vu+(next_lsoff_v<<1),
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		// 2 lines u
+		precalc_src_addr_u = src_addr_u+(next_interpl_vu*src_linestride_vu);
+		next_lsoff_u = ((unsigned int)precalc_src_addr_u)&0x0F;
+		mfc_get( u_plane[next_src_idx],
+				((unsigned int) precalc_src_addr_u)&0xFFFFFFF0,
+				src_dbl_linestride_vu+(next_lsoff_v<<1),
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+		// scaling
+		// work line y_upper
+		bilinear_scale_line_w16( y_plane[curr_src_idx],
+				scaled_y_plane[curr_src_idx],
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_upper,
+				src_linestride_y );
+		// work line y_lower
+		bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+				scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_lower,
+				src_linestride_y );
+		// work line v
+		bilinear_scale_line_w8( v_plane[curr_src_idx]+curr_lsoff_v,
+				scaled_v_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+		// work line u
+		bilinear_scale_line_w8( u_plane[curr_src_idx]+curr_lsoff_u,
+				scaled_u_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+
+		//---------------------------------------------------------------------------------------------
+		DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+		// Perform three DMA transfers to 3 different locations in the main memory!
+		// dst_width:	Pixel width of destination image
+		// dst_addr:	Destination address in main memory
+		// dst_vu:	Counter which is incremented one by one
+		// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+		mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int)  dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+				dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int)  dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+		//---------------------------------------------------------------------------------------------
+
+
+		// update for next cycle
+		curr_src_idx = next_src_idx;
+		curr_dst_idx = next_dst_idx;
+
+		curr_interpl_y_upper = next_interpl_y_upper;
+		curr_interpl_y_lower = next_interpl_y_lower;
+		curr_interpl_vu = next_interpl_vu;
+
+		vf_curr_NSweight_y_upper = vf_curr_NSweight_y_upper;
+		vf_curr_NSweight_y_lower = vf_curr_NSweight_y_lower;
+		vf_curr_NSweight_vu = vf_next_NSweight_vu;
+
+		curr_src_y_upper = next_src_y_upper;
+		curr_src_y_lower = next_src_y_lower;
+		curr_src_vu = next_src_vu;
+
+		curr_lsoff_v = next_lsoff_v;
+		curr_lsoff_u = next_lsoff_u;
+	}
+
+
+
+	DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+	// scaling
+	// work line y_upper
+	bilinear_scale_line_w16( y_plane[curr_src_idx],
+			scaled_y_plane[curr_src_idx],
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_upper,
+			src_linestride_y );
+	// work line y_lower
+	bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_lower,
+			src_linestride_y );
+	// work line v
+	bilinear_scale_line_w8( v_plane[curr_src_idx]+curr_lsoff_v,
+			scaled_v_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+	// work line u
+	bilinear_scale_line_w8( u_plane[curr_src_idx]+curr_lsoff_u,
+			scaled_u_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+
+	//---------------------------------------------------------------------------------------------
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+	// Perform three DMA transfers to 3 different locations in the main memory!
+	// dst_width:	Pixel width of destination image
+	// dst_addr:	Destination address in main memory
+	// dst_vu:	Counter which is incremented one by one
+	// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+	mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+			dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	// wait for completion
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+	//---------------------------------------------------------------------------------------------
+}
+
+
+/*
+ * scale_srcw32_dstw16()
+ *
+ * processes an input image of width 32
+ * scaling is done to a width 16
+ * yuv2rgb conversion on a width of 16
+ * result stored in RAM
+ */
+void scale_srcw32_dstw16() {
+	// extract parameters
+	unsigned char* dst_addr = (unsigned char *)parms.dstBuffer;
+
+	unsigned int src_width = parms.src_pixel_width;
+	unsigned int src_height = parms.src_pixel_height;
+	unsigned int dst_width = parms.dst_pixel_width;
+	unsigned int dst_height = parms.dst_pixel_height;
+
+	// YVU
+	unsigned int src_linestride_y = src_width;
+	unsigned int src_dbl_linestride_y = src_width<<1;
+	unsigned int src_linestride_vu = src_width>>1;
+	unsigned int src_dbl_linestride_vu = src_width;
+	// scaled YVU
+	unsigned int scaled_src_linestride_y = dst_width;
+
+	// ram addresses
+	unsigned char* src_addr_y = parms.y_plane;
+	unsigned char* src_addr_v = parms.v_plane;
+	unsigned char* src_addr_u = parms.u_plane;
+
+	unsigned int dst_picture_size = dst_width*dst_height;
+
+	// Sizes for destination
+	unsigned int dst_dbl_linestride_y = dst_width<<1;
+	unsigned int dst_dbl_linestride_vu = dst_width>>1;
+
+	// Perform address calculation for Y, V and U in main memory with dst_addr as base
+	unsigned char* dst_addr_main_memory_y = dst_addr;
+	unsigned char* dst_addr_main_memory_v = dst_addr + dst_picture_size;
+	unsigned char* dst_addr_main_memory_u = dst_addr_main_memory_v +(dst_picture_size>>2);
+
+	// calculate scale factors
+	vector float vf_x_scale = spu_splats( (float)src_width/(float)dst_width );
+	float y_scale = (float)src_height/(float)dst_height;
+
+	// double buffered processing
+	// buffer switching
+	unsigned int curr_src_idx = 0;
+	unsigned int curr_dst_idx = 0;
+	unsigned int next_src_idx, next_dst_idx;
+
+	// 2 lines y as output, upper and lowerline
+	unsigned int curr_interpl_y_upper = 0;
+	unsigned int next_interpl_y_upper;
+	unsigned int curr_interpl_y_lower, next_interpl_y_lower;
+	// only 1 line v/u output, both planes have the same dimension
+	unsigned int curr_interpl_vu = 0;
+	unsigned int next_interpl_vu;
+
+	// weights, calculated in every loop iteration
+	vector float vf_curr_NSweight_y_upper = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_y_upper;
+	vector float vf_curr_NSweight_y_lower, vf_next_NSweight_y_lower;
+	vector float vf_curr_NSweight_vu = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_vu;
+
+	// line indices for the src picture
+	float curr_src_y_upper = 0.0f, next_src_y_upper;
+	float curr_src_y_lower, next_src_y_lower;
+	float curr_src_vu = 0.0f, next_src_vu;
+
+	// line indices for the dst picture
+	unsigned int dst_y=0, dst_vu=0;
+
+	// calculate lower line idices
+	curr_src_y_lower = ((float)curr_interpl_y_upper+1)*y_scale;
+	curr_interpl_y_lower = (unsigned int)curr_src_y_lower;
+	// lower line weight
+	vf_curr_NSweight_y_lower = spu_splats( curr_src_y_lower-(float)curr_interpl_y_lower );
+
+
+	// start partially double buffered processing
+	// get initial data, 2 sets of y, 1 set v, 1 set u
+	mfc_get( y_plane[curr_src_idx], (unsigned int) src_addr_y, src_dbl_linestride_y, RETR_BUF, 0, 0 );
+	mfc_get( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			(unsigned int) src_addr_y+(curr_interpl_y_lower*src_linestride_y),
+			src_dbl_linestride_y,
+			RETR_BUF,
+			0, 0 );
+	mfc_get( v_plane[curr_src_idx], (unsigned int) src_addr_v, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+	mfc_get( u_plane[curr_src_idx], (unsigned int) src_addr_u, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+
+	// iteration loop
+	// within each iteration 4 lines y, 2 lines v, 2 lines u are retrieved
+	// the scaled output is 2 lines y, 1 line v, 1 line u
+	// the yuv2rgb-converted output is stored to RAM
+	for( dst_vu=0; dst_vu<(dst_height>>1)-1; dst_vu++ ) {
+		dst_y = dst_vu<<1;
+
+		// calculate next indices
+		next_src_vu = ((float)dst_vu+1)*y_scale;
+		next_src_y_upper = ((float)dst_y+2)*y_scale;
+		next_src_y_lower = ((float)dst_y+3)*y_scale;
+
+		next_interpl_vu = (unsigned int) next_src_vu;
+		next_interpl_y_upper = (unsigned int) next_src_y_upper;
+		next_interpl_y_lower = (unsigned int) next_src_y_lower;
+
+		// calculate weight NORTH-SOUTH
+		vf_next_NSweight_vu = spu_splats( next_src_vu-(float)next_interpl_vu );
+		vf_next_NSweight_y_upper = spu_splats( next_src_y_upper-(float)next_interpl_y_upper );
+		vf_next_NSweight_y_lower = spu_splats( next_src_y_lower-(float)next_interpl_y_lower );
+
+		// get next lines
+		next_src_idx = curr_src_idx^1;
+		next_dst_idx = curr_dst_idx^1;
+
+		// 4 lines y
+		mfc_get( y_plane[next_src_idx],
+				(unsigned int) src_addr_y+(next_interpl_y_upper*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		mfc_get( y_plane[next_src_idx]+src_dbl_linestride_y,
+				(unsigned int) src_addr_y+(next_interpl_y_lower*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		// 2 lines v
+		mfc_get( v_plane[next_src_idx],
+				(unsigned int) src_addr_v+(next_interpl_vu*src_linestride_vu),
+				src_dbl_linestride_vu,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		// 2 lines u
+		mfc_get( u_plane[next_src_idx],
+				(unsigned int) src_addr_u+(next_interpl_vu*src_linestride_vu),
+				src_dbl_linestride_vu,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+		// scaling
+		// work line y_upper
+		bilinear_scale_line_w16( y_plane[curr_src_idx],
+				scaled_y_plane[curr_src_idx],
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_upper,
+				src_linestride_y );
+		// work line y_lower
+		bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+				scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_lower,
+				src_linestride_y );
+		// work line v
+		bilinear_scale_line_w16( v_plane[curr_src_idx],
+				scaled_v_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+		// work line u
+		bilinear_scale_line_w16( u_plane[curr_src_idx],
+				scaled_u_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+
+		//---------------------------------------------------------------------------------------------
+		DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+		// Perform three DMA transfers to 3 different locations in the main memory!
+		// dst_width:	Pixel width of destination image
+		// dst_addr:	Destination address in main memory
+		// dst_vu:	Counter which is incremented one by one
+		// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+		mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int)  dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+				dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int)  dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu), // Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+		//---------------------------------------------------------------------------------------------
+
+
+		// update for next cycle
+		curr_src_idx = next_src_idx;
+		curr_dst_idx = next_dst_idx;
+
+		curr_interpl_y_upper = next_interpl_y_upper;
+		curr_interpl_y_lower = next_interpl_y_lower;
+		curr_interpl_vu = next_interpl_vu;
+
+		vf_curr_NSweight_y_upper = vf_curr_NSweight_y_upper;
+		vf_curr_NSweight_y_lower = vf_curr_NSweight_y_lower;
+		vf_curr_NSweight_vu = vf_next_NSweight_vu;
+
+		curr_src_y_upper = next_src_y_upper;
+		curr_src_y_lower = next_src_y_lower;
+		curr_src_vu = next_src_vu;
+	}
+
+
+
+	DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+	// scaling
+	// work line y_upper
+	bilinear_scale_line_w16( y_plane[curr_src_idx],
+			scaled_y_plane[curr_src_idx],
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_upper,
+			src_linestride_y );
+	// work line y_lower
+	bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_lower,
+			src_linestride_y );
+	// work line v
+	bilinear_scale_line_w16( v_plane[curr_src_idx],
+			scaled_v_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+	// work line u
+	bilinear_scale_line_w16( u_plane[curr_src_idx],
+			scaled_u_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+
+
+	//---------------------------------------------------------------------------------------------
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+	// Perform three DMA transfers to 3 different locations in the main memory!
+	// dst_width:	Pixel width of destination image
+	// dst_addr:	Destination address in main memory
+	// dst_vu:	Counter which is incremented one by one
+	// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+	mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+			dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu), // Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	// wait for completion
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+	//---------------------------------------------------------------------------------------------
+}
+
+
+/**
+ * scale_srcw32_dstw32()
+ *
+ * processes an input image of width 32
+ * scaling is done to a width 32
+ * yuv2rgb conversion on a width of 32
+ * result stored in RAM
+ */
+void scale_srcw32_dstw32() {
+	// extract parameters
+	unsigned char* dst_addr = (unsigned char *)parms.dstBuffer;
+
+	unsigned int src_width = parms.src_pixel_width;
+	unsigned int src_height = parms.src_pixel_height;
+	unsigned int dst_width = parms.dst_pixel_width;
+	unsigned int dst_height = parms.dst_pixel_height;
+
+	// YVU
+	unsigned int src_linestride_y = src_width;
+	unsigned int src_dbl_linestride_y = src_width<<1;
+	unsigned int src_linestride_vu = src_width>>1;
+	unsigned int src_dbl_linestride_vu = src_width;
+
+	// scaled YVU
+	unsigned int scaled_src_linestride_y = dst_width;
+
+	// ram addresses
+	unsigned char* src_addr_y = parms.y_plane;
+	unsigned char* src_addr_v = parms.v_plane;
+	unsigned char* src_addr_u = parms.u_plane;
+
+	unsigned int dst_picture_size = dst_width*dst_height;
+
+	// Sizes for destination
+	unsigned int dst_dbl_linestride_y = dst_width<<1;
+	unsigned int dst_dbl_linestride_vu = dst_width>>1;
+
+	// Perform address calculation for Y, V and U in main memory with dst_addr as base
+	unsigned char* dst_addr_main_memory_y = dst_addr;
+	unsigned char* dst_addr_main_memory_v = dst_addr + dst_picture_size;
+	unsigned char* dst_addr_main_memory_u = dst_addr_main_memory_v +(dst_picture_size>>2);
+
+	// calculate scale factors
+	vector float vf_x_scale = spu_splats( (float)src_width/(float)dst_width );
+	float y_scale = (float)src_height/(float)dst_height;
+
+	// double buffered processing
+	// buffer switching
+	unsigned int curr_src_idx = 0;
+	unsigned int curr_dst_idx = 0;
+	unsigned int next_src_idx, next_dst_idx;
+
+	// 2 lines y as output, upper and lowerline
+	unsigned int curr_interpl_y_upper = 0;
+	unsigned int next_interpl_y_upper;
+	unsigned int curr_interpl_y_lower, next_interpl_y_lower;
+	// only 1 line v/u output, both planes have the same dimension
+	unsigned int curr_interpl_vu = 0;
+	unsigned int next_interpl_vu;
+
+	// weights, calculated in every loop iteration
+	vector float vf_curr_NSweight_y_upper = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_y_upper;
+	vector float vf_curr_NSweight_y_lower, vf_next_NSweight_y_lower;
+	vector float vf_curr_NSweight_vu = { 0.0f, 0.0f, 0.0f, 0.0f };
+	vector float vf_next_NSweight_vu;
+
+	// line indices for the src picture
+	float curr_src_y_upper = 0.0f, next_src_y_upper;
+	float curr_src_y_lower, next_src_y_lower;
+	float curr_src_vu = 0.0f, next_src_vu;
+
+	// line indices for the dst picture
+	unsigned int dst_y=0, dst_vu=0;
+
+	// calculate lower line idices
+	curr_src_y_lower = ((float)curr_interpl_y_upper+1)*y_scale;
+	curr_interpl_y_lower = (unsigned int)curr_src_y_lower;
+	// lower line weight
+	vf_curr_NSweight_y_lower = spu_splats( curr_src_y_lower-(float)curr_interpl_y_lower );
+
+
+	// start partially double buffered processing
+	// get initial data, 2 sets of y, 1 set v, 1 set u
+	mfc_get( y_plane[curr_src_idx], (unsigned int) src_addr_y, src_dbl_linestride_y, RETR_BUF, 0, 0 );
+	mfc_get( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			(unsigned int) src_addr_y+(curr_interpl_y_lower*src_linestride_y),
+			src_dbl_linestride_y,
+			RETR_BUF,
+			0, 0 );
+	mfc_get( v_plane[curr_src_idx], (unsigned int) src_addr_v, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+	mfc_get( u_plane[curr_src_idx], (unsigned int) src_addr_u, src_dbl_linestride_vu, RETR_BUF, 0, 0 );
+
+	// iteration loop
+	// within each iteration 4 lines y, 2 lines v, 2 lines u are retrieved
+	// the scaled output is 2 lines y, 1 line v, 1 line u
+	// the yuv2rgb-converted output is stored to RAM
+	for( dst_vu=0; dst_vu<(dst_height>>1)-1; dst_vu++ ) {
+		dst_y = dst_vu<<1;
+
+		// calculate next indices
+		next_src_vu = ((float)dst_vu+1)*y_scale;
+		next_src_y_upper = ((float)dst_y+2)*y_scale;
+		next_src_y_lower = ((float)dst_y+3)*y_scale;
+
+		next_interpl_vu = (unsigned int) next_src_vu;
+		next_interpl_y_upper = (unsigned int) next_src_y_upper;
+		next_interpl_y_lower = (unsigned int) next_src_y_lower;
+
+		// calculate weight NORTH-SOUTH
+		vf_next_NSweight_vu = spu_splats( next_src_vu-(float)next_interpl_vu );
+		vf_next_NSweight_y_upper = spu_splats( next_src_y_upper-(float)next_interpl_y_upper );
+		vf_next_NSweight_y_lower = spu_splats( next_src_y_lower-(float)next_interpl_y_lower );
+
+		// get next lines
+		next_src_idx = curr_src_idx^1;
+		next_dst_idx = curr_dst_idx^1;
+
+		// 4 lines y
+		mfc_get( y_plane[next_src_idx],
+				(unsigned int) src_addr_y+(next_interpl_y_upper*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		mfc_get( y_plane[next_src_idx]+src_dbl_linestride_y,
+				(unsigned int) src_addr_y+(next_interpl_y_lower*src_linestride_y),
+				src_dbl_linestride_y,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		// 2 lines v
+		mfc_get( v_plane[next_src_idx],
+				(unsigned int) src_addr_v+(next_interpl_vu*src_linestride_vu),
+				src_dbl_linestride_vu,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+		// 2 lines u
+		mfc_get( u_plane[next_src_idx],
+				(unsigned int) src_addr_u+(next_interpl_vu*src_linestride_vu),
+				src_dbl_linestride_vu,
+				RETR_BUF+next_src_idx,
+				0, 0 );
+
+		DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+		// scaling
+		// work line y_upper
+		bilinear_scale_line_w16( y_plane[curr_src_idx],
+				scaled_y_plane[curr_src_idx],
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_upper,
+				src_linestride_y );
+		// work line y_lower
+		bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+				scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+				dst_width,
+				vf_x_scale,
+				vf_curr_NSweight_y_lower,
+				src_linestride_y );
+		// work line v
+		bilinear_scale_line_w16( v_plane[curr_src_idx],
+				scaled_v_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+		// work line u
+		bilinear_scale_line_w16( u_plane[curr_src_idx],
+				scaled_u_plane[curr_src_idx],
+				dst_width>>1,
+				vf_x_scale,
+				vf_curr_NSweight_vu,
+				src_linestride_vu );
+
+
+
+		// Store the result back to main memory into a destination buffer in YUV format
+		//---------------------------------------------------------------------------------------------
+		DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+		// Perform three DMA transfers to 3 different locations in the main memory!
+		// dst_width:	Pixel width of destination image
+		// dst_addr:	Destination address in main memory
+		// dst_vu:	Counter which is incremented one by one
+		// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+		mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int) dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+				dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+
+		mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+				(unsigned int) dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+				dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+				STR_BUF+curr_dst_idx,								// Tag
+				0, 0 );
+		//---------------------------------------------------------------------------------------------
+
+
+		// update for next cycle
+		curr_src_idx = next_src_idx;
+		curr_dst_idx = next_dst_idx;
+
+		curr_interpl_y_upper = next_interpl_y_upper;
+		curr_interpl_y_lower = next_interpl_y_lower;
+		curr_interpl_vu = next_interpl_vu;
+
+		vf_curr_NSweight_y_upper = vf_curr_NSweight_y_upper;
+		vf_curr_NSweight_y_lower = vf_curr_NSweight_y_lower;
+		vf_curr_NSweight_vu = vf_next_NSweight_vu;
+
+		curr_src_y_upper = next_src_y_upper;
+		curr_src_y_lower = next_src_y_lower;
+		curr_src_vu = next_src_vu;
+	}
+
+
+
+	DMA_WAIT_TAG( (RETR_BUF+curr_src_idx) );
+
+	// scaling
+	// work line y_upper
+	bilinear_scale_line_w16( y_plane[curr_src_idx],
+			scaled_y_plane[curr_src_idx],
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_upper,
+			src_linestride_y );
+	// work line y_lower
+	bilinear_scale_line_w16( y_plane[curr_src_idx]+src_dbl_linestride_y,
+			scaled_y_plane[curr_src_idx]+scaled_src_linestride_y,
+			dst_width,
+			vf_x_scale,
+			vf_curr_NSweight_y_lower,
+			src_linestride_y );
+	// work line v
+	bilinear_scale_line_w16( v_plane[curr_src_idx],
+			scaled_v_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+	// work line u
+	bilinear_scale_line_w16( u_plane[curr_src_idx],
+			scaled_u_plane[curr_src_idx],
+			dst_width>>1,
+			vf_x_scale,
+			vf_curr_NSweight_vu,
+			src_linestride_vu );
+
+
+	// Store the result back to main memory into a destination buffer in YUV format
+	//---------------------------------------------------------------------------------------------
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+
+	// Perform three DMA transfers to 3 different locations in the main memory!
+	// dst_width:	Pixel width of destination image
+	// dst_addr:	Destination address in main memory
+	// dst_vu:	Counter which is incremented one by one
+	// dst_y:	Counter which is twice larger than dst_vu (dst_y = 2*dst_vu)
+
+	mfc_put(	scaled_y_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_y + (dst_vu*dst_dbl_linestride_y),	// Destination in main memory (addr)
+			dst_dbl_linestride_y,								// Two Y lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_v_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int) dst_addr_main_memory_v + (dst_vu*dst_dbl_linestride_vu),	// Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two V lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	mfc_put(	scaled_u_plane[curr_src_idx],							// What from local store (addr)
+			(unsigned int)  dst_addr_main_memory_u + (dst_vu*dst_dbl_linestride_vu), // Destination in main memory (addr)
+			dst_dbl_linestride_vu,								// Two U lines (depending on the widht of the destination resolution)
+			STR_BUF+curr_dst_idx,								// Tag
+			0, 0 );
+
+	// wait for completion
+	DMA_WAIT_TAG( (STR_BUF+curr_dst_idx) );
+	//---------------------------------------------------------------------------------------------
+}
+
+
+/*
+ * bilinear_scale_line_w8()
+ *
+ * processes a line of yuv-input, width has to be a multiple of 8
+ * scaled yuv-output is written to local store buffer
+ *
+ * @param src buffer for 2 lines input
+ * @param dst_ buffer for 1 line output
+ * @param dst_width the width of the destination line
+ * @param vf_x_scale a float vector, at each entry is the x_scale-factor
+ * @param vf_NSweight a float vector, at each position is the weight NORTH/SOUTH for the current line
+ * @param src_linestride the stride of the srcline
+ */
+void bilinear_scale_line_w8( unsigned char* src, unsigned char* dst_, unsigned int dst_width, vector float vf_x_scale, vector float vf_NSweight, unsigned int src_linestride ) {
+
+	unsigned char* dst = dst_;
+
+	unsigned int dst_x;
+	for( dst_x=0; dst_x<dst_width; dst_x+=8) {
+		// address calculation for loading the 4 surrounding pixel of each calculated
+		// destination pixel
+		vector unsigned int vui_dst_x_tmp = spu_splats( dst_x );
+		// lower range->first 4 pixel
+		// upper range->next 4 pixel
+		vector unsigned int vui_inc_dst_x_lower_range = { 0, 1, 2, 3 };
+		vector unsigned int vui_inc_dst_x_upper_range = { 4, 5, 6, 7 };
+		vector unsigned int vui_dst_x_lower_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_lower_range );
+		vector unsigned int vui_dst_x_upper_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_upper_range );
+
+		// calculate weight EAST-WEST
+		vector float vf_dst_x_lower_range = spu_convtf( vui_dst_x_lower_range, 0 );
+		vector float vf_dst_x_upper_range = spu_convtf( vui_dst_x_upper_range, 0 );
+		vector float vf_src_x_lower_range = spu_mul( vf_dst_x_lower_range, vf_x_scale );
+		vector float vf_src_x_upper_range = spu_mul( vf_dst_x_upper_range, vf_x_scale );
+		vector unsigned int vui_interpl_x_lower_range = spu_convtu( vf_src_x_lower_range, 0 );
+		vector unsigned int vui_interpl_x_upper_range = spu_convtu( vf_src_x_upper_range, 0 );
+		vector float vf_interpl_x_lower_range = spu_convtf( vui_interpl_x_lower_range, 0 );
+		vector float vf_interpl_x_upper_range = spu_convtf( vui_interpl_x_upper_range, 0 );
+		vector float vf_EWweight_lower_range = spu_sub( vf_src_x_lower_range, vf_interpl_x_lower_range );
+		vector float vf_EWweight_upper_range = spu_sub( vf_src_x_upper_range, vf_interpl_x_upper_range );
+
+		// calculate address offset
+		//
+		// pixel NORTH WEST
+		vector unsigned int vui_off_pixelNW_lower_range = vui_interpl_x_lower_range;
+		vector unsigned int vui_off_pixelNW_upper_range = vui_interpl_x_upper_range;
+
+		// pixel NORTH EAST-->(offpixelNW+1)
+		vector unsigned int vui_add_1 = { 1, 1, 1, 1 };
+		vector unsigned int vui_off_pixelNE_lower_range = spu_add( vui_off_pixelNW_lower_range, vui_add_1 );
+		vector unsigned int vui_off_pixelNE_upper_range = spu_add( vui_off_pixelNW_upper_range, vui_add_1 );
+
+		// SOUTH-WEST-->(offpixelNW+src_linestride)
+		vector unsigned int vui_srclinestride = spu_splats( src_linestride );
+		vector unsigned int vui_off_pixelSW_lower_range = spu_add( vui_srclinestride, vui_off_pixelNW_lower_range );
+		vector unsigned int vui_off_pixelSW_upper_range = spu_add( vui_srclinestride, vui_off_pixelNW_upper_range );
+
+		// SOUTH-EAST-->(offpixelNW+src_linestride+1)
+		vector unsigned int vui_off_pixelSE_lower_range = spu_add( vui_srclinestride, vui_off_pixelNE_lower_range );
+		vector unsigned int vui_off_pixelSE_upper_range = spu_add( vui_srclinestride, vui_off_pixelNE_upper_range );
+
+		// calculate each address
+		vector unsigned int vui_src_ls = spu_splats( (unsigned int) src );
+		vector unsigned int vui_addr_pixelNW_lower_range = spu_add( vui_src_ls, vui_off_pixelNW_lower_range );
+		vector unsigned int vui_addr_pixelNW_upper_range = spu_add( vui_src_ls, vui_off_pixelNW_upper_range );
+		vector unsigned int vui_addr_pixelNE_lower_range = spu_add( vui_src_ls, vui_off_pixelNE_lower_range );
+		vector unsigned int vui_addr_pixelNE_upper_range = spu_add( vui_src_ls, vui_off_pixelNE_upper_range );
+
+		vector unsigned int vui_addr_pixelSW_lower_range = spu_add( vui_src_ls, vui_off_pixelSW_lower_range );
+		vector unsigned int vui_addr_pixelSW_upper_range = spu_add( vui_src_ls, vui_off_pixelSW_upper_range );
+		vector unsigned int vui_addr_pixelSE_lower_range = spu_add( vui_src_ls, vui_off_pixelSE_lower_range );
+		vector unsigned int vui_addr_pixelSE_upper_range = spu_add( vui_src_ls, vui_off_pixelSE_upper_range );
+
+		// get each pixel
+		//
+		// scalar load, afterwards insertion into the right position
+		// NORTH WEST
+		vector unsigned char null_vector = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+		vector unsigned char vuc_pixel_NW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_lower_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_lower_range, 1 )),
+				vuc_pixel_NW_lower_range, 7 );
+		vuc_pixel_NW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_lower_range, 2 )),
+				vuc_pixel_NW_lower_range, 11 );
+		vuc_pixel_NW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_lower_range, 3 )),
+				vuc_pixel_NW_lower_range, 15 );
+
+		vector unsigned char vuc_pixel_NW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_upper_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_upper_range, 1 )),
+				vuc_pixel_NW_upper_range, 7 );
+		vuc_pixel_NW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_upper_range, 2 )),
+				vuc_pixel_NW_upper_range, 11 );
+		vuc_pixel_NW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_upper_range, 3 )),
+				vuc_pixel_NW_upper_range, 15 );
+
+		// NORTH EAST
+		vector unsigned char vuc_pixel_NE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_lower_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_lower_range, 1 )),
+				vuc_pixel_NE_lower_range, 7 );
+		vuc_pixel_NE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_lower_range, 2 )),
+				vuc_pixel_NE_lower_range, 11 );
+		vuc_pixel_NE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_lower_range, 3 )),
+				vuc_pixel_NE_lower_range, 15 );
+
+		vector unsigned char vuc_pixel_NE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_upper_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_upper_range, 1 )),
+				vuc_pixel_NE_upper_range, 7 );
+		vuc_pixel_NE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_upper_range, 2 )),
+				vuc_pixel_NE_upper_range, 11 );
+		vuc_pixel_NE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_upper_range, 3 )),
+				vuc_pixel_NE_upper_range, 15 );
+
+
+		// SOUTH WEST
+		vector unsigned char vuc_pixel_SW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_lower_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_lower_range, 1 )),
+				vuc_pixel_SW_lower_range, 7 );
+		vuc_pixel_SW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_lower_range, 2 )),
+				vuc_pixel_SW_lower_range, 11 );
+		vuc_pixel_SW_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_lower_range, 3 )),
+				vuc_pixel_SW_lower_range, 15 );
+
+		vector unsigned char vuc_pixel_SW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_upper_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_upper_range, 1 )),
+				vuc_pixel_SW_upper_range, 7 );
+		vuc_pixel_SW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_upper_range, 2 )),
+				vuc_pixel_SW_upper_range, 11 );
+		vuc_pixel_SW_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_upper_range, 3 )),
+				vuc_pixel_SW_upper_range, 15 );
+
+		// SOUTH EAST
+		vector unsigned char vuc_pixel_SE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_lower_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_lower_range, 1 )),
+				vuc_pixel_SE_lower_range, 7 );
+		vuc_pixel_SE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_lower_range, 2 )),
+				vuc_pixel_SE_lower_range, 11 );
+		vuc_pixel_SE_lower_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_lower_range, 3 )),
+				vuc_pixel_SE_lower_range, 15 );
+
+		vector unsigned char vuc_pixel_SE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_upper_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_upper_range, 1 )),
+				vuc_pixel_SE_upper_range, 7 );
+		vuc_pixel_SE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_upper_range, 2 )),
+				vuc_pixel_SE_upper_range, 11 );
+		vuc_pixel_SE_upper_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_upper_range, 3 )),
+				vuc_pixel_SE_upper_range, 15 );
+
+
+		// convert to float
+		vector float vf_pixel_NW_lower_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_lower_range, 0 );
+		vector float vf_pixel_NW_upper_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_upper_range, 0 );
+
+		vector float vf_pixel_SW_lower_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_lower_range, 0 );
+		vector float vf_pixel_SW_upper_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_upper_range, 0 );
+
+		vector float vf_pixel_NE_lower_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_lower_range, 0 );
+		vector float vf_pixel_NE_upper_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_upper_range, 0 );
+
+		vector float vf_pixel_SE_lower_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_lower_range, 0 );
+		vector float vf_pixel_SE_upper_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_upper_range, 0 );
+
+
+
+		// first linear interpolation: EWtop
+		// EWtop = NW + EWweight*(NE-NW)
+		//
+		// lower range
+		vector float vf_EWtop_lower_range_tmp = spu_sub( vf_pixel_NE_lower_range, vf_pixel_NW_lower_range );
+		vector float vf_EWtop_lower_range = spu_madd( vf_EWweight_lower_range,
+								vf_EWtop_lower_range_tmp,
+								vf_pixel_NW_lower_range );
+
+		// upper range
+		vector float vf_EWtop_upper_range_tmp = spu_sub( vf_pixel_NE_upper_range, vf_pixel_NW_upper_range );
+		vector float vf_EWtop_upper_range = spu_madd( vf_EWweight_upper_range,
+								vf_EWtop_upper_range_tmp,
+								vf_pixel_NW_upper_range );
+
+
+
+		// second linear interpolation: EWbottom
+		// EWbottom = SW + EWweight*(SE-SW)
+		//
+		// lower range
+		vector float vf_EWbottom_lower_range_tmp = spu_sub( vf_pixel_SE_lower_range, vf_pixel_SW_lower_range );
+		vector float vf_EWbottom_lower_range = spu_madd( vf_EWweight_lower_range,
+								vf_EWbottom_lower_range_tmp,
+								vf_pixel_SW_lower_range );
+
+		// upper range
+		vector float vf_EWbottom_upper_range_tmp = spu_sub( vf_pixel_SE_upper_range, vf_pixel_SW_upper_range );
+		vector float vf_EWbottom_upper_range = spu_madd( vf_EWweight_upper_range,
+								vf_EWbottom_upper_range_tmp,
+								vf_pixel_SW_upper_range );
+
+
+
+		// third linear interpolation: the bilinear interpolated value
+		// result = EWtop + NSweight*(EWbottom-EWtop);
+		//
+		// lower range
+		vector float vf_result_lower_range_tmp = spu_sub( vf_EWbottom_lower_range, vf_EWtop_lower_range );
+		vector float vf_result_lower_range = spu_madd( vf_NSweight,
+								vf_result_lower_range_tmp,
+								vf_EWtop_lower_range );
+
+		// upper range
+		vector float vf_result_upper_range_tmp = spu_sub( vf_EWbottom_upper_range, vf_EWtop_upper_range );
+		vector float vf_result_upper_range = spu_madd( vf_NSweight,
+								vf_result_upper_range_tmp,
+								vf_EWtop_upper_range );
+
+
+		// convert back: using saturated arithmetic
+		vector unsigned int vui_result_lower_range = vfloat_to_vuint( vf_result_lower_range );
+		vector unsigned int vui_result_upper_range = vfloat_to_vuint( vf_result_upper_range );
+
+		// merge results->lower,upper
+		vector unsigned char vuc_mask_merge_result = { 0x03, 0x07, 0x0B, 0x0F,
+							       0x13, 0x17, 0x1B, 0x1F,
+							       0x00, 0x00, 0x00, 0x00,
+							       0x00, 0x00, 0x00, 0x00 };
+
+		vector unsigned char vuc_result = spu_shuffle( (vector unsigned char) vui_result_lower_range,
+								(vector unsigned char) vui_result_upper_range,
+								vuc_mask_merge_result );
+
+		// partial storing
+		vector unsigned char vuc_mask_out = { 0x00, 0x00, 0x00, 0x00,
+						      0x00, 0x00, 0x00, 0x00,
+						      0xFF, 0xFF, 0xFF, 0xFF,
+						      0xFF, 0xFF, 0xFF, 0xFF };
+
+
+		// get currently stored data
+		vector unsigned char vuc_orig = *((vector unsigned char*)dst);
+
+		// clear currently stored data
+		vuc_orig = spu_and( vuc_orig,
+				spu_rlqwbyte( vuc_mask_out, ((unsigned int)dst)&0x0F) );
+
+		// rotate result according to storing address
+		vuc_result = spu_rlqwbyte( vuc_result, ((unsigned int)dst)&0x0F );
+
+		// store result
+		*((vector unsigned char*)dst) = spu_or( vuc_result,
+							vuc_orig );
+		dst += 8;
+	}
+}
+
+
+/*
+ * bilinear_scale_line_w16()
+ *
+ * processes a line of yuv-input, width has to be a multiple of 16
+ * scaled yuv-output is written to local store buffer
+ *
+ * @param src buffer for 2 lines input
+ * @param dst_ buffer for 1 line output
+ * @param dst_width the width of the destination line
+ * @param vf_x_scale a float vector, at each entry is the x_scale-factor
+ * @param vf_NSweight a float vector, at each position is the weight NORTH/SOUTH for the current line
+ * @param src_linestride the stride of the srcline
+ */
+void bilinear_scale_line_w16( unsigned char* src, unsigned char* dst_, unsigned int dst_width, vector float vf_x_scale, vector float vf_NSweight, unsigned int src_linestride ) {
+
+	unsigned char* dst = dst_;
+
+	unsigned int dst_x;
+	for( dst_x=0; dst_x<dst_width; dst_x+=16) {
+		// address calculation for loading the 4 surrounding pixel of each calculated
+		// destination pixel
+		vector unsigned int vui_dst_x_tmp = spu_splats( dst_x );
+		// parallelised processing
+		// first range->pixel 1 2 3 4
+		// second range->pixel 5 6 7 8
+		// third range->pixel 9 10 11 12
+		// fourth range->pixel 13 14 15 16
+		vector unsigned int vui_inc_dst_x_first_range = { 0, 1, 2, 3 };
+		vector unsigned int vui_inc_dst_x_second_range = { 4, 5, 6, 7 };
+		vector unsigned int vui_inc_dst_x_third_range = { 8, 9, 10, 11 };
+		vector unsigned int vui_inc_dst_x_fourth_range = { 12, 13, 14, 15 };
+		vector unsigned int vui_dst_x_first_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_first_range );
+		vector unsigned int vui_dst_x_second_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_second_range );
+		vector unsigned int vui_dst_x_third_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_third_range );
+		vector unsigned int vui_dst_x_fourth_range = spu_add( vui_dst_x_tmp, vui_inc_dst_x_fourth_range );
+
+		// calculate weight EAST-WEST
+		vector float vf_dst_x_first_range = spu_convtf( vui_dst_x_first_range, 0 );
+		vector float vf_dst_x_second_range = spu_convtf( vui_dst_x_second_range, 0 );
+		vector float vf_dst_x_third_range = spu_convtf( vui_dst_x_third_range, 0 );
+		vector float vf_dst_x_fourth_range = spu_convtf( vui_dst_x_fourth_range, 0 );
+		vector float vf_src_x_first_range = spu_mul( vf_dst_x_first_range, vf_x_scale );
+		vector float vf_src_x_second_range = spu_mul( vf_dst_x_second_range, vf_x_scale );
+		vector float vf_src_x_third_range = spu_mul( vf_dst_x_third_range, vf_x_scale );
+		vector float vf_src_x_fourth_range = spu_mul( vf_dst_x_fourth_range, vf_x_scale );
+		vector unsigned int vui_interpl_x_first_range = spu_convtu( vf_src_x_first_range, 0 );
+		vector unsigned int vui_interpl_x_second_range = spu_convtu( vf_src_x_second_range, 0 );
+		vector unsigned int vui_interpl_x_third_range = spu_convtu( vf_src_x_third_range, 0 );
+		vector unsigned int vui_interpl_x_fourth_range = spu_convtu( vf_src_x_fourth_range, 0 );
+		vector float vf_interpl_x_first_range = spu_convtf( vui_interpl_x_first_range, 0 );
+		vector float vf_interpl_x_second_range = spu_convtf( vui_interpl_x_second_range, 0 );
+		vector float vf_interpl_x_third_range = spu_convtf( vui_interpl_x_third_range, 0 );
+		vector float vf_interpl_x_fourth_range = spu_convtf( vui_interpl_x_fourth_range, 0 );
+		vector float vf_EWweight_first_range = spu_sub( vf_src_x_first_range, vf_interpl_x_first_range );
+		vector float vf_EWweight_second_range = spu_sub( vf_src_x_second_range, vf_interpl_x_second_range );
+		vector float vf_EWweight_third_range = spu_sub( vf_src_x_third_range, vf_interpl_x_third_range );
+		vector float vf_EWweight_fourth_range = spu_sub( vf_src_x_fourth_range, vf_interpl_x_fourth_range );
+
+		// calculate address offset
+		//
+		// pixel NORTH WEST
+		vector unsigned int vui_off_pixelNW_first_range = vui_interpl_x_first_range;
+		vector unsigned int vui_off_pixelNW_second_range = vui_interpl_x_second_range;
+		vector unsigned int vui_off_pixelNW_third_range = vui_interpl_x_third_range;
+		vector unsigned int vui_off_pixelNW_fourth_range = vui_interpl_x_fourth_range;
+
+		// pixel NORTH EAST-->(offpixelNW+1)
+		vector unsigned int vui_add_1 = { 1, 1, 1, 1 };
+		vector unsigned int vui_off_pixelNE_first_range = spu_add( vui_off_pixelNW_first_range, vui_add_1 );
+		vector unsigned int vui_off_pixelNE_second_range = spu_add( vui_off_pixelNW_second_range, vui_add_1 );
+		vector unsigned int vui_off_pixelNE_third_range = spu_add( vui_off_pixelNW_third_range, vui_add_1 );
+		vector unsigned int vui_off_pixelNE_fourth_range = spu_add( vui_off_pixelNW_fourth_range, vui_add_1 );
+
+		// SOUTH-WEST-->(offpixelNW+src_linestride)
+		vector unsigned int vui_srclinestride = spu_splats( src_linestride );
+		vector unsigned int vui_off_pixelSW_first_range = spu_add( vui_srclinestride, vui_off_pixelNW_first_range );
+		vector unsigned int vui_off_pixelSW_second_range = spu_add( vui_srclinestride, vui_off_pixelNW_second_range );
+		vector unsigned int vui_off_pixelSW_third_range = spu_add( vui_srclinestride, vui_off_pixelNW_third_range );
+		vector unsigned int vui_off_pixelSW_fourth_range = spu_add( vui_srclinestride, vui_off_pixelNW_fourth_range );
+
+		// SOUTH-EAST-->(offpixelNW+src_linestride+1)
+		vector unsigned int vui_off_pixelSE_first_range = spu_add( vui_srclinestride, vui_off_pixelNE_first_range );
+		vector unsigned int vui_off_pixelSE_second_range = spu_add( vui_srclinestride, vui_off_pixelNE_second_range );
+		vector unsigned int vui_off_pixelSE_third_range = spu_add( vui_srclinestride, vui_off_pixelNE_third_range );
+		vector unsigned int vui_off_pixelSE_fourth_range = spu_add( vui_srclinestride, vui_off_pixelNE_fourth_range );
+
+		// calculate each address
+		vector unsigned int vui_src_ls = spu_splats( (unsigned int) src );
+		vector unsigned int vui_addr_pixelNW_first_range = spu_add( vui_src_ls, vui_off_pixelNW_first_range );
+		vector unsigned int vui_addr_pixelNW_second_range = spu_add( vui_src_ls, vui_off_pixelNW_second_range );
+		vector unsigned int vui_addr_pixelNW_third_range = spu_add( vui_src_ls, vui_off_pixelNW_third_range );
+		vector unsigned int vui_addr_pixelNW_fourth_range = spu_add( vui_src_ls, vui_off_pixelNW_fourth_range );
+
+		vector unsigned int vui_addr_pixelNE_first_range = spu_add( vui_src_ls, vui_off_pixelNE_first_range );
+		vector unsigned int vui_addr_pixelNE_second_range = spu_add( vui_src_ls, vui_off_pixelNE_second_range );
+		vector unsigned int vui_addr_pixelNE_third_range = spu_add( vui_src_ls, vui_off_pixelNE_third_range );
+		vector unsigned int vui_addr_pixelNE_fourth_range = spu_add( vui_src_ls, vui_off_pixelNE_fourth_range );
+
+		vector unsigned int vui_addr_pixelSW_first_range = spu_add( vui_src_ls, vui_off_pixelSW_first_range );
+		vector unsigned int vui_addr_pixelSW_second_range = spu_add( vui_src_ls, vui_off_pixelSW_second_range );
+		vector unsigned int vui_addr_pixelSW_third_range = spu_add( vui_src_ls, vui_off_pixelSW_third_range );
+		vector unsigned int vui_addr_pixelSW_fourth_range = spu_add( vui_src_ls, vui_off_pixelSW_fourth_range );
+
+		vector unsigned int vui_addr_pixelSE_first_range = spu_add( vui_src_ls, vui_off_pixelSE_first_range );
+		vector unsigned int vui_addr_pixelSE_second_range = spu_add( vui_src_ls, vui_off_pixelSE_second_range );
+		vector unsigned int vui_addr_pixelSE_third_range = spu_add( vui_src_ls, vui_off_pixelSE_third_range );
+		vector unsigned int vui_addr_pixelSE_fourth_range = spu_add( vui_src_ls, vui_off_pixelSE_fourth_range );
+
+
+		// get each pixel
+		//
+		// scalar load, afterwards insertion into the right position
+		// NORTH WEST
+		// first range
+		vector unsigned char null_vector = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+		vector unsigned char vuc_pixel_NW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_first_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_first_range, 1 )),
+				vuc_pixel_NW_first_range, 7 );
+		vuc_pixel_NW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_first_range, 2 )),
+				vuc_pixel_NW_first_range, 11 );
+		vuc_pixel_NW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_first_range, 3 )),
+				vuc_pixel_NW_first_range, 15 );
+		// second range
+		vector unsigned char vuc_pixel_NW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_second_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_second_range, 1 )),
+				vuc_pixel_NW_second_range, 7 );
+		vuc_pixel_NW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_second_range, 2 )),
+				vuc_pixel_NW_second_range, 11 );
+		vuc_pixel_NW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_second_range, 3 )),
+				vuc_pixel_NW_second_range, 15 );
+		// third range
+		vector unsigned char vuc_pixel_NW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_third_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_third_range, 1 )),
+				vuc_pixel_NW_third_range, 7 );
+		vuc_pixel_NW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_third_range, 2 )),
+				vuc_pixel_NW_third_range, 11 );
+		vuc_pixel_NW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_third_range, 3 )),
+				vuc_pixel_NW_third_range, 15 );
+		// fourth range
+		vector unsigned char vuc_pixel_NW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_fourth_range, 0 )), null_vector, 3 );
+		vuc_pixel_NW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_fourth_range, 1 )),
+				vuc_pixel_NW_fourth_range, 7 );
+		vuc_pixel_NW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_fourth_range, 2 )),
+				vuc_pixel_NW_fourth_range, 11 );
+		vuc_pixel_NW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNW_fourth_range, 3 )),
+				vuc_pixel_NW_fourth_range, 15 );
+
+		// NORTH EAST
+		// first range
+		vector unsigned char vuc_pixel_NE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_first_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_first_range, 1 )),
+				vuc_pixel_NE_first_range, 7 );
+		vuc_pixel_NE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_first_range, 2 )),
+				vuc_pixel_NE_first_range, 11 );
+		vuc_pixel_NE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_first_range, 3 )),
+				vuc_pixel_NE_first_range, 15 );
+		// second range
+		vector unsigned char vuc_pixel_NE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_second_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_second_range, 1 )),
+				vuc_pixel_NE_second_range, 7 );
+		vuc_pixel_NE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_second_range, 2 )),
+				vuc_pixel_NE_second_range, 11 );
+		vuc_pixel_NE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_second_range, 3 )),
+				vuc_pixel_NE_second_range, 15 );
+		// third range
+		vector unsigned char vuc_pixel_NE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_third_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_third_range, 1 )),
+				vuc_pixel_NE_third_range, 7 );
+		vuc_pixel_NE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_third_range, 2 )),
+				vuc_pixel_NE_third_range, 11 );
+		vuc_pixel_NE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_third_range, 3 )),
+				vuc_pixel_NE_third_range, 15 );
+		// fourth range
+		vector unsigned char vuc_pixel_NE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_fourth_range, 0 )), null_vector, 3 );
+		vuc_pixel_NE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_fourth_range, 1 )),
+				vuc_pixel_NE_fourth_range, 7 );
+		vuc_pixel_NE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_fourth_range, 2 )),
+				vuc_pixel_NE_fourth_range, 11 );
+		vuc_pixel_NE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelNE_fourth_range, 3 )),
+				vuc_pixel_NE_fourth_range, 15 );
+
+		// SOUTH WEST
+		// first range
+		vector unsigned char vuc_pixel_SW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_first_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_first_range, 1 )),
+				vuc_pixel_SW_first_range, 7 );
+		vuc_pixel_SW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_first_range, 2 )),
+				vuc_pixel_SW_first_range, 11 );
+		vuc_pixel_SW_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_first_range, 3 )),
+				vuc_pixel_SW_first_range, 15 );
+		// second range
+		vector unsigned char vuc_pixel_SW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_second_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_second_range, 1 )),
+				vuc_pixel_SW_second_range, 7 );
+		vuc_pixel_SW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_second_range, 2 )),
+				vuc_pixel_SW_second_range, 11 );
+		vuc_pixel_SW_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_second_range, 3 )),
+				vuc_pixel_SW_second_range, 15 );
+		// third range
+		vector unsigned char vuc_pixel_SW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_third_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_third_range, 1 )),
+				vuc_pixel_SW_third_range, 7 );
+		vuc_pixel_SW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_third_range, 2 )),
+				vuc_pixel_SW_third_range, 11 );
+		vuc_pixel_SW_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_third_range, 3 )),
+				vuc_pixel_SW_third_range, 15 );
+		// fourth range
+		vector unsigned char vuc_pixel_SW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_fourth_range, 0 )), null_vector, 3 );
+		vuc_pixel_SW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_fourth_range, 1 )),
+				vuc_pixel_SW_fourth_range, 7 );
+		vuc_pixel_SW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_fourth_range, 2 )),
+				vuc_pixel_SW_fourth_range, 11 );
+		vuc_pixel_SW_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSW_fourth_range, 3 )),
+				vuc_pixel_SW_fourth_range, 15 );
+
+		// NORTH EAST
+		// first range
+		vector unsigned char vuc_pixel_SE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_first_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_first_range, 1 )),
+				vuc_pixel_SE_first_range, 7 );
+		vuc_pixel_SE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_first_range, 2 )),
+				vuc_pixel_SE_first_range, 11 );
+		vuc_pixel_SE_first_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_first_range, 3 )),
+				vuc_pixel_SE_first_range, 15 );
+		// second range
+		vector unsigned char vuc_pixel_SE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_second_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_second_range, 1 )),
+				vuc_pixel_SE_second_range, 7 );
+		vuc_pixel_SE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_second_range, 2 )),
+				vuc_pixel_SE_second_range, 11 );
+		vuc_pixel_SE_second_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_second_range, 3 )),
+				vuc_pixel_SE_second_range, 15 );
+		// third range
+		vector unsigned char vuc_pixel_SE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_third_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_third_range, 1 )),
+				vuc_pixel_SE_third_range, 7 );
+		vuc_pixel_SE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_third_range, 2 )),
+				vuc_pixel_SE_third_range, 11 );
+		vuc_pixel_SE_third_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_third_range, 3 )),
+				vuc_pixel_SE_third_range, 15 );
+		// fourth range
+		vector unsigned char vuc_pixel_SE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_fourth_range, 0 )), null_vector, 3 );
+		vuc_pixel_SE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_fourth_range, 1 )),
+				vuc_pixel_SE_fourth_range, 7 );
+		vuc_pixel_SE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_fourth_range, 2 )),
+				vuc_pixel_SE_fourth_range, 11 );
+		vuc_pixel_SE_fourth_range = spu_insert(
+				*((unsigned char*) spu_extract( vui_addr_pixelSE_fourth_range, 3 )),
+				vuc_pixel_SE_fourth_range, 15 );
+
+
+
+		// convert to float
+		vector float vf_pixel_NW_first_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_first_range, 0 );
+		vector float vf_pixel_NW_second_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_second_range, 0 );
+		vector float vf_pixel_NW_third_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_third_range, 0 );
+		vector float vf_pixel_NW_fourth_range = spu_convtf( (vector unsigned int) vuc_pixel_NW_fourth_range, 0 );
+
+		vector float vf_pixel_NE_first_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_first_range, 0 );
+		vector float vf_pixel_NE_second_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_second_range, 0 );
+		vector float vf_pixel_NE_third_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_third_range, 0 );
+		vector float vf_pixel_NE_fourth_range = spu_convtf( (vector unsigned int) vuc_pixel_NE_fourth_range, 0 );
+
+		vector float vf_pixel_SW_first_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_first_range, 0 );
+		vector float vf_pixel_SW_second_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_second_range, 0 );
+		vector float vf_pixel_SW_third_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_third_range, 0 );
+		vector float vf_pixel_SW_fourth_range = spu_convtf( (vector unsigned int) vuc_pixel_SW_fourth_range, 0 );
+
+		vector float vf_pixel_SE_first_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_first_range, 0 );
+		vector float vf_pixel_SE_second_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_second_range, 0 );
+		vector float vf_pixel_SE_third_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_third_range, 0 );
+		vector float vf_pixel_SE_fourth_range = spu_convtf( (vector unsigned int) vuc_pixel_SE_fourth_range, 0 );
+
+		// first linear interpolation: EWtop
+		// EWtop = NW + EWweight*(NE-NW)
+		//
+		// first range
+		vector float vf_EWtop_first_range_tmp = spu_sub( vf_pixel_NE_first_range, vf_pixel_NW_first_range );
+		vector float vf_EWtop_first_range = spu_madd( vf_EWweight_first_range,
+								vf_EWtop_first_range_tmp,
+								vf_pixel_NW_first_range );
+
+		// second range
+		vector float vf_EWtop_second_range_tmp = spu_sub( vf_pixel_NE_second_range, vf_pixel_NW_second_range );
+		vector float vf_EWtop_second_range = spu_madd( vf_EWweight_second_range,
+								vf_EWtop_second_range_tmp,
+								vf_pixel_NW_second_range );
+
+		// third range
+		vector float vf_EWtop_third_range_tmp = spu_sub( vf_pixel_NE_third_range, vf_pixel_NW_third_range );
+		vector float vf_EWtop_third_range = spu_madd( vf_EWweight_third_range,
+								vf_EWtop_third_range_tmp,
+								vf_pixel_NW_third_range );
+
+		// fourth range
+		vector float vf_EWtop_fourth_range_tmp = spu_sub( vf_pixel_NE_fourth_range, vf_pixel_NW_fourth_range );
+		vector float vf_EWtop_fourth_range = spu_madd( vf_EWweight_fourth_range,
+								vf_EWtop_fourth_range_tmp,
+								vf_pixel_NW_fourth_range );
+
+
+
+		// second linear interpolation: EWbottom
+		// EWbottom = SW + EWweight*(SE-SW)
+		//
+		// first range
+		vector float vf_EWbottom_first_range_tmp = spu_sub( vf_pixel_SE_first_range, vf_pixel_SW_first_range );
+		vector float vf_EWbottom_first_range = spu_madd( vf_EWweight_first_range,
+								vf_EWbottom_first_range_tmp,
+								vf_pixel_SW_first_range );
+
+		// second range
+		vector float vf_EWbottom_second_range_tmp = spu_sub( vf_pixel_SE_second_range, vf_pixel_SW_second_range );
+		vector float vf_EWbottom_second_range = spu_madd( vf_EWweight_second_range,
+								vf_EWbottom_second_range_tmp,
+								vf_pixel_SW_second_range );
+		// first range
+		vector float vf_EWbottom_third_range_tmp = spu_sub( vf_pixel_SE_third_range, vf_pixel_SW_third_range );
+		vector float vf_EWbottom_third_range = spu_madd( vf_EWweight_third_range,
+								vf_EWbottom_third_range_tmp,
+								vf_pixel_SW_third_range );
+
+		// first range
+		vector float vf_EWbottom_fourth_range_tmp = spu_sub( vf_pixel_SE_fourth_range, vf_pixel_SW_fourth_range );
+		vector float vf_EWbottom_fourth_range = spu_madd( vf_EWweight_fourth_range,
+								vf_EWbottom_fourth_range_tmp,
+								vf_pixel_SW_fourth_range );
+
+
+
+		// third linear interpolation: the bilinear interpolated value
+		// result = EWtop + NSweight*(EWbottom-EWtop);
+		//
+		// first range
+		vector float vf_result_first_range_tmp = spu_sub( vf_EWbottom_first_range, vf_EWtop_first_range );
+		vector float vf_result_first_range = spu_madd( vf_NSweight,
+								vf_result_first_range_tmp,
+								vf_EWtop_first_range );
+
+		// second range
+		vector float vf_result_second_range_tmp = spu_sub( vf_EWbottom_second_range, vf_EWtop_second_range );
+		vector float vf_result_second_range = spu_madd( vf_NSweight,
+								vf_result_second_range_tmp,
+								vf_EWtop_second_range );
+
+		// third range
+		vector float vf_result_third_range_tmp = spu_sub( vf_EWbottom_third_range, vf_EWtop_third_range );
+		vector float vf_result_third_range = spu_madd( vf_NSweight,
+								vf_result_third_range_tmp,
+								vf_EWtop_third_range );
+
+		// fourth range
+		vector float vf_result_fourth_range_tmp = spu_sub( vf_EWbottom_fourth_range, vf_EWtop_fourth_range );
+		vector float vf_result_fourth_range = spu_madd( vf_NSweight,
+								vf_result_fourth_range_tmp,
+								vf_EWtop_fourth_range );
+
+
+
+		// convert back: using saturated arithmetic
+		vector unsigned int vui_result_first_range = vfloat_to_vuint( vf_result_first_range );
+		vector unsigned int vui_result_second_range = vfloat_to_vuint( vf_result_second_range );
+		vector unsigned int vui_result_third_range = vfloat_to_vuint( vf_result_third_range );
+		vector unsigned int vui_result_fourth_range = vfloat_to_vuint( vf_result_fourth_range );
+
+		// merge results->lower,upper
+		vector unsigned char vuc_mask_merge_result_first_second = { 0x03, 0x07, 0x0B, 0x0F,
+							       		    0x13, 0x17, 0x1B, 0x1F,
+							       		    0x00, 0x00, 0x00, 0x00,
+							       		    0x00, 0x00, 0x00, 0x00 };
+
+		vector unsigned char vuc_mask_merge_result_third_fourth = { 0x00, 0x00, 0x00, 0x00,
+							       		    0x00, 0x00, 0x00, 0x00,
+									    0x03, 0x07, 0x0B, 0x0F,
+							       		    0x13, 0x17, 0x1B, 0x1F };
+
+		vector unsigned char vuc_result_first_second =
+						spu_shuffle( (vector unsigned char) vui_result_first_range,
+								 (vector unsigned char) vui_result_second_range,
+								vuc_mask_merge_result_first_second );
+
+		vector unsigned char vuc_result_third_fourth =
+						spu_shuffle( (vector unsigned char) vui_result_third_range,
+								 (vector unsigned char) vui_result_fourth_range,
+								vuc_mask_merge_result_third_fourth );
+
+		// store result
+		*((vector unsigned char*)dst) = spu_or( vuc_result_first_second,
+							vuc_result_third_fourth );
+		dst += 16;
+	}
+}
+