sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2001,2003,2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: #include <liboil/liboilfunction.h>
sl@0: #include "conv.h"
sl@0: 
sl@0: #include <math.h>
sl@0: 
sl@0: 
sl@0: static void
sl@0: conv_f64_s16_table(double *dest, int dest_stride, const short *src,
sl@0: 	int src_stride, int n)
sl@0: {
sl@0: 	static double ints_high[256];
sl@0: 	static double ints_low[256];
sl@0: 	static int init = 0;
sl@0: 	int i;
sl@0: 	unsigned int idx;
sl@0: 	if(!init){
sl@0: 		for(i=0;i<256;i++){
sl@0: 			ints_high[i]=256.0*((i<128)?i:i-256);
sl@0: 			ints_low[i]=i;
sl@0: 		}
sl@0: 		init = 1;
sl@0: 	}
sl@0: 
sl@0: 	if(n&1){
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 		n-=1;
sl@0: 	}
sl@0: 	for(i=0;i<n;i+=2){
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 	}
sl@0: }
sl@0: OIL_DEFINE_IMPL(conv_f64_s16_table, conv_f64_s16);
sl@0: 
sl@0: static void
sl@0: conv_f32_s16_table(float *dest, int dest_stride, const short *src,
sl@0: 	int src_stride, int n)
sl@0: {
sl@0: 	static float ints_high[256];
sl@0: 	static float ints_low[256];
sl@0: 	static int init = 0;
sl@0: 	int i;
sl@0: 	unsigned int idx;
sl@0: 	if(!init){
sl@0: 		for(i=0;i<256;i++){
sl@0: 			ints_high[i]=256.0*((i<128)?i:i-256);
sl@0: 			ints_low[i]=i;
sl@0: 		}
sl@0: 		init = 1;
sl@0: 	}
sl@0: 
sl@0: 	if(n&1){
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 		n-=1;
sl@0: 	}
sl@0: 	for(i=0;i<n;i+=2){
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 		idx = (unsigned short)*src;
sl@0: 		*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
sl@0: 		OIL_INCREMENT(dest, dest_stride);
sl@0: 		OIL_INCREMENT(src, src_stride);
sl@0: 	}
sl@0: }
sl@0: OIL_DEFINE_IMPL(conv_f32_s16_table, conv_f32_s16);
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_conv_f64_s16_table() {
sl@0: 		return &_oil_function_impl_conv_f64_s16_table;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_conv_f32_s16_table() {
sl@0: 		return &_oil_function_impl_conv_f32_s16_table;
sl@0: }
sl@0: #endif
sl@0: