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author | Gloria Wang <gwang@google.com> | 2010-02-04 13:58:20 -0800 |
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committer | Gloria Wang <gwang@google.com> | 2010-02-04 17:28:49 -0800 |
commit | 0f6f2525f7b19c7de18bafe464b5ced1c714430a (patch) | |
tree | 5b98cd42769dc25c7245ffbf98f05d0edd58d3d9 /Tremolo/mdct.h | |
parent | 1ad63ab102c811406313f978721427fca25151a6 (diff) | |
download | external_tremolo-0f6f2525f7b19c7de18bafe464b5ced1c714430a.zip external_tremolo-0f6f2525f7b19c7de18bafe464b5ced1c714430a.tar.gz external_tremolo-0f6f2525f7b19c7de18bafe464b5ced1c714430a.tar.bz2 |
Replace Tremor with Tremolo (an ARM optimised version of the Tremor library for doing Ogg Vorbis decompression)
Diffstat (limited to 'Tremolo/mdct.h')
-rw-r--r-- | Tremolo/mdct.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/Tremolo/mdct.h b/Tremolo/mdct.h new file mode 100644 index 0000000..5e865d0 --- /dev/null +++ b/Tremolo/mdct.h @@ -0,0 +1,59 @@ +/******************************************************************** + * * + * 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 1994-2003 * + * 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_backward(int n, DATA_TYPE *in); +extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right); +extern void mdct_unroll_lap(int n0,int n1, + int lW,int W, + DATA_TYPE *in,DATA_TYPE *right, + LOOKUP_T *w0,LOOKUP_T *w1, + ogg_int16_t *out, + int step, + int start,int end /* samples, this frame */); + +#endif + + + + + + + + + + + + |