1*bda690e4SXin Li /************************************************************************ 2*bda690e4SXin Li * Copyright (C) 2002-2009, Xiph.org Foundation 3*bda690e4SXin Li * Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd 4*bda690e4SXin Li * All rights reserved. 5*bda690e4SXin Li * 6*bda690e4SXin Li * Redistribution and use in source and binary forms, with or without 7*bda690e4SXin Li * modification, are permitted provided that the following conditions 8*bda690e4SXin Li * are met: 9*bda690e4SXin Li * 10*bda690e4SXin Li * * Redistributions of source code must retain the above copyright 11*bda690e4SXin Li * notice, this list of conditions and the following disclaimer. 12*bda690e4SXin Li * * Redistributions in binary form must reproduce the above 13*bda690e4SXin Li * copyright notice, this list of conditions and the following disclaimer 14*bda690e4SXin Li * in the documentation and/or other materials provided with the 15*bda690e4SXin Li * distribution. 16*bda690e4SXin Li * * Neither the names of the Xiph.org Foundation nor Pinknoise 17*bda690e4SXin Li * Productions Ltd nor the names of its contributors may be used to 18*bda690e4SXin Li * endorse or promote products derived from this software without 19*bda690e4SXin Li * specific prior written permission. 20*bda690e4SXin Li * 21*bda690e4SXin Li * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22*bda690e4SXin Li * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23*bda690e4SXin Li * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24*bda690e4SXin Li * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25*bda690e4SXin Li * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26*bda690e4SXin Li * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27*bda690e4SXin Li * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28*bda690e4SXin Li * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29*bda690e4SXin Li * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30*bda690e4SXin Li * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31*bda690e4SXin Li * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32*bda690e4SXin Li ************************************************************************ 33*bda690e4SXin Li 34*bda690e4SXin Li function: modified discrete cosine transform prototypes 35*bda690e4SXin Li 36*bda690e4SXin Li ************************************************************************/ 37*bda690e4SXin Li 38*bda690e4SXin Li #ifndef _OGG_mdct_H_ 39*bda690e4SXin Li #define _OGG_mdct_H_ 40*bda690e4SXin Li 41*bda690e4SXin Li #include "ivorbiscodec.h" 42*bda690e4SXin Li #include "misc.h" 43*bda690e4SXin Li 44*bda690e4SXin Li #define DATA_TYPE ogg_int32_t 45*bda690e4SXin Li #define REG_TYPE register ogg_int32_t 46*bda690e4SXin Li 47*bda690e4SXin Li #ifdef _LOW_ACCURACY_ 48*bda690e4SXin Li #define cPI3_8 (0x0062) 49*bda690e4SXin Li #define cPI2_8 (0x00b5) 50*bda690e4SXin Li #define cPI1_8 (0x00ed) 51*bda690e4SXin Li #else 52*bda690e4SXin Li #define cPI3_8 (0x30fbc54d) 53*bda690e4SXin Li #define cPI2_8 (0x5a82799a) 54*bda690e4SXin Li #define cPI1_8 (0x7641af3d) 55*bda690e4SXin Li #endif 56*bda690e4SXin Li 57*bda690e4SXin Li extern void mdct_backward(int n, DATA_TYPE *in); 58*bda690e4SXin Li extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right); 59*bda690e4SXin Li extern void mdct_unroll_lap(int n0,int n1, 60*bda690e4SXin Li int lW,int W, 61*bda690e4SXin Li DATA_TYPE *in,DATA_TYPE *right, 62*bda690e4SXin Li LOOKUP_T *w0,LOOKUP_T *w1, 63*bda690e4SXin Li ogg_int16_t *out, 64*bda690e4SXin Li int step, 65*bda690e4SXin Li int start,int end /* samples, this frame */); 66*bda690e4SXin Li 67*bda690e4SXin Li #endif 68*bda690e4SXin Li 69*bda690e4SXin Li 70*bda690e4SXin Li 71*bda690e4SXin Li 72*bda690e4SXin Li 73*bda690e4SXin Li 74*bda690e4SXin Li 75*bda690e4SXin Li 76*bda690e4SXin Li 77*bda690e4SXin Li 78*bda690e4SXin Li 79*bda690e4SXin Li 80