/************************************************************************
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* Copyright (C) 2002-2009, Xiph.org Foundation
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* Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd
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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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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the names of the Xiph.org Foundation nor Pinknoise
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* Productions Ltd nor the names of its contributors may be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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************************************************************************
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function: modified discrete cosine transform prototypes
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************************************************************************/
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#ifndef _OGG_mdct_H_
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#define _OGG_mdct_H_
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#include "ivorbiscodec.h"
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#include "misc.h"
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#define DATA_TYPE ogg_int32_t
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#define REG_TYPE register ogg_int32_t
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#ifdef _LOW_ACCURACY_
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#define cPI3_8 (0x0062)
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#define cPI2_8 (0x00b5)
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#define cPI1_8 (0x00ed)
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#else
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#define cPI3_8 (0x30fbc54d)
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#define cPI2_8 (0x5a82799a)
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#define cPI1_8 (0x7641af3d)
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#endif
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extern void mdct_backward(int n, DATA_TYPE *in);
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extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right);
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extern void mdct_unroll_lap(int n0,int n1,
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int lW,int W,
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DATA_TYPE *in,DATA_TYPE *right,
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LOOKUP_T *w0,LOOKUP_T *w1,
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ogg_int16_t *out,
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int step,
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int start,int end /* samples, this frame */);
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#endif
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