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Diffstat (limited to 'media/libtremor/lib/mdct.h')
| -rw-r--r-- | media/libtremor/lib/mdct.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/media/libtremor/lib/mdct.h b/media/libtremor/lib/mdct.h new file mode 100644 index 000000000..6d8890720 --- /dev/null +++ b/media/libtremor/lib/mdct.h @@ -0,0 +1,52 @@ +/******************************************************************** + * * + * 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 + + + + + + + + + + + + |