Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 1 | /************************************************************************ |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 2 | * Copyright (C) 2002-2009, Xiph.org Foundation |
| 3 | * Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 16 | * * Neither the names of the Xiph.org Foundation nor Pinknoise |
| 17 | * Productions Ltd nor the names of its contributors may be used to |
| 18 | * endorse or promote products derived from this software without |
| 19 | * specific prior written permission. |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| 25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | ************************************************************************ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 33 | |
| 34 | function: modified discrete cosine transform prototypes |
| 35 | |
Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame] | 36 | ************************************************************************/ |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 37 | |
| 38 | #ifndef _OGG_mdct_H_ |
| 39 | #define _OGG_mdct_H_ |
| 40 | |
| 41 | #include "ivorbiscodec.h" |
| 42 | #include "misc.h" |
| 43 | |
| 44 | #define DATA_TYPE ogg_int32_t |
| 45 | #define REG_TYPE register ogg_int32_t |
| 46 | |
| 47 | #ifdef _LOW_ACCURACY_ |
| 48 | #define cPI3_8 (0x0062) |
| 49 | #define cPI2_8 (0x00b5) |
| 50 | #define cPI1_8 (0x00ed) |
| 51 | #else |
| 52 | #define cPI3_8 (0x30fbc54d) |
| 53 | #define cPI2_8 (0x5a82799a) |
| 54 | #define cPI1_8 (0x7641af3d) |
| 55 | #endif |
| 56 | |
| 57 | extern void mdct_backward(int n, DATA_TYPE *in); |
| 58 | extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right); |
| 59 | extern void mdct_unroll_lap(int n0,int n1, |
| 60 | int lW,int W, |
| 61 | DATA_TYPE *in,DATA_TYPE *right, |
| 62 | LOOKUP_T *w0,LOOKUP_T *w1, |
| 63 | ogg_int16_t *out, |
| 64 | int step, |
| 65 | int start,int end /* samples, this frame */); |
| 66 | |
| 67 | #endif |
| 68 | |
| 69 | |
| 70 | |
| 71 | |
| 72 | |
| 73 | |
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