| Gloria Wang | 0f6f252 | 2010-02-04 13:58:20 -0800 | [diff] [blame^] | 1 | /******************************************************************** |
| 2 | * * |
| 3 | * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * |
| 4 | * * |
| 5 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
| 6 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
| 7 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
| 8 | * * |
| 9 | * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 * |
| 10 | * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * |
| 11 | * * |
| 12 | ******************************************************************** |
| 13 | |
| 14 | function: modified discrete cosine transform prototypes |
| 15 | |
| 16 | ********************************************************************/ |
| 17 | |
| 18 | #ifndef _OGG_mdct_H_ |
| 19 | #define _OGG_mdct_H_ |
| 20 | |
| 21 | #include "ivorbiscodec.h" |
| 22 | #include "misc.h" |
| 23 | |
| 24 | #define DATA_TYPE ogg_int32_t |
| 25 | #define REG_TYPE register ogg_int32_t |
| 26 | |
| 27 | #ifdef _LOW_ACCURACY_ |
| 28 | #define cPI3_8 (0x0062) |
| 29 | #define cPI2_8 (0x00b5) |
| 30 | #define cPI1_8 (0x00ed) |
| 31 | #else |
| 32 | #define cPI3_8 (0x30fbc54d) |
| 33 | #define cPI2_8 (0x5a82799a) |
| 34 | #define cPI1_8 (0x7641af3d) |
| 35 | #endif |
| 36 | |
| 37 | extern void mdct_backward(int n, DATA_TYPE *in); |
| 38 | extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right); |
| 39 | extern void mdct_unroll_lap(int n0,int n1, |
| 40 | int lW,int W, |
| 41 | DATA_TYPE *in,DATA_TYPE *right, |
| 42 | LOOKUP_T *w0,LOOKUP_T *w1, |
| 43 | ogg_int16_t *out, |
| 44 | int step, |
| 45 | int start,int end /* samples, this frame */); |
| 46 | |
| 47 | #endif |
| 48 | |
| 49 | |
| 50 | |
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