/media/libtremor/lib/mdct.h
http://github.com/zpao/v8monkey · C Header · 52 lines · 18 code · 18 blank · 16 comment · 0 complexity · d2e73b4e720d4eba72d498d1620f37a4 MD5 · raw file
- /********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
- * *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
- * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
- * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
- * *
- * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
- * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
- * *
- ********************************************************************
- 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_forward(int n, DATA_TYPE *in, DATA_TYPE *out);
- extern void mdct_backward(int n, DATA_TYPE *in, DATA_TYPE *out);
- #endif