Combine the Vorbis, WMA and AAC IMDCT functions and put them into the codeclib. Combined IMDCT is now based on existing Tremor transform. Reduces CPU for 192k AAC by 21MHz on Coldfire, and 5MHz on PP5024. WMA and Vorbis should have no functional changes since they already used this code. Further optimization is possible and would benefit all 3 codecs.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18412 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 0 insertions, 54 deletions

diff --git a/apps/codecs/Tremor/mdct.h b/apps/codecs/Tremor/mdct.h
deleted file mode 100644
index bdfe0e7304..0000000000
--- a/apps/codecs/Tremor/mdct.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/********************************************************************
- *                                                                  *
- * 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);
-//extern void mdct_bitreverse(DATA_TYPE *x,int n,int step,int shift);
-//extern void mdct_butterflies(DATA_TYPE *x,int points,int shift);
-
-#endif
-
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