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