| Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame^] | 1 | /************************************************************************ |
| 2 | * Copyright (C) 2010, The Android Open Source Project |
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| Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 31 | |
| 32 | function: modified discrete cosine transform prototypes |
| 33 | |
| Gloria Wang | 37fe158 | 2010-03-12 14:53:20 -0800 | [diff] [blame^] | 34 | ************************************************************************/ |
| Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 35 | |
| 36 | #ifndef _OGG_mdct_H_ |
| 37 | #define _OGG_mdct_H_ |
| 38 | |
| 39 | #include "ivorbiscodec.h" |
| 40 | #include "misc.h" |
| 41 | |
| 42 | #define DATA_TYPE ogg_int32_t |
| 43 | #define REG_TYPE register ogg_int32_t |
| 44 | |
| 45 | #ifdef _LOW_ACCURACY_ |
| 46 | #define cPI3_8 (0x0062) |
| 47 | #define cPI2_8 (0x00b5) |
| 48 | #define cPI1_8 (0x00ed) |
| 49 | #else |
| 50 | #define cPI3_8 (0x30fbc54d) |
| 51 | #define cPI2_8 (0x5a82799a) |
| 52 | #define cPI1_8 (0x7641af3d) |
| 53 | #endif |
| 54 | |
| 55 | extern void mdct_backward(int n, DATA_TYPE *in); |
| 56 | extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right); |
| 57 | extern void mdct_unroll_lap(int n0,int n1, |
| 58 | int lW,int W, |
| 59 | DATA_TYPE *in,DATA_TYPE *right, |
| 60 | LOOKUP_T *w0,LOOKUP_T *w1, |
| 61 | ogg_int16_t *out, |
| 62 | int step, |
| 63 | int start,int end /* samples, this frame */); |
| 64 | |
| 65 | #endif |
| 66 | |
| 67 | |
| 68 | |
| 69 | |
| 70 | |
| 71 | |
| 72 | |
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