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/*
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* LIBOIL - Library of Optimized Inner Loops
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* Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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//Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <liboil/liboilfunction.h>
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#include "liboil/dct/dct.h"
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#include <math.h>
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/**
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* oil_imdct32_f32:
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* @d_32:
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* @s_32:
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*
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* Performs a Inverse Modified Discrete Cosine Transform (IMDCT)
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* on the source array @s_32 and places the result in @d_32.
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*/
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OIL_DEFINE_CLASS (imdct32_f32, "float *d_32, float *s_32");
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static void imdct32_f32_ref (float *dest, const float *src)
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{
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double x;
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int i,j;
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double coeff;
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for(i=0;i<32;i++){
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x = 0;
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for(j=0;j<32;j++){
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coeff = cos((M_PI/32)*i*(j+0.5));
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x += coeff * src[j];
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}
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dest[i] = x;
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}
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}
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OIL_DEFINE_IMPL_REF (imdct32_f32_ref, imdct32_f32);
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#ifdef __SYMBIAN32__
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OilFunctionClass* __oil_function_class_imdct32_f32() {
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return &_oil_function_class_imdct32_f32;
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}
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#endif
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#ifdef __SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_imdct32_f32_ref() {
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return &_oil_function_impl_imdct32_f32_ref;
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}
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#endif
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#ifdef __SYMBIAN32__
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EXPORT_C void** _oil_function_class_ptr_imdct32_f32 () {
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oil_function_class_ptr_imdct32_f32 = __oil_function_class_imdct32_f32();
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return &oil_function_class_ptr_imdct32_f32->func;
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}
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#endif
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