winamp/Src/vlb/dolby_imdct.h

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2024-09-24 12:54:57 +00:00
/* $Header: /cvs/root/winamp/vlb/dolby_imdct.h,v 1.1 2009/04/28 20:21:09 audiodsp Exp $ */
/***************************************************************************\
*
* Copyright 2000-2002 Dolby Laboratories, Inc. All Rights
* Reserved. Do not copy. Do not distribute.
* Confidential information.
*
* filename: dolby_mdct.h
* project : MPEG-2 AAC Decoder
* contents/description: Inverse MDCT include file
*
\***************************************************************************/
#ifndef _DOLBY_IMDCT_H
#define _DOLBY_IMDCT_H
#include<math.h>
#include<string.h>
#include"fft.h"
/*#define INTERPOLATE_WINDOW */
class IMDCTObject{
public:
IMDCTObject(int _iLongSize,
int _iOverlap);
IMDCTObject();
IMDCTObject(IMDCTObject&oCopy);
IMDCTObject& operator=(IMDCTObject&oCopy);
~IMDCTObject();
int Transform( float*pfData,
int iWindowType,
int iWindowShape);
private:
enum {
LONG_BLOCK,
SHORT_BLOCK
};
enum {
LONG_WINDOW = 0,
START_WINDOW = 1,
EIGHT_SHORT_SEQUENCE = 2,
STOP_WINDOW = 3
};
enum {
SINE_WINDOW = 0,
KBD_WINDOW = 1
};
void imdct(float* pfData, int blocktype);
private:
int iLongSize;
int iShortSize;
int iHLongSize;
int iHShortSize;
int iOverlap;
int iOldShape;
//Windows:
float*pfLongWindowSin;
float*pfS2LWindowSin;
float*pfShortWindowSin;
float*pfLongWindowKBD;
float*pfS2LWindowKBD;
float*pfShortWindowKBD;
float*pfTempBuffer;
float*pfEightWindowsBuffer;
float*pfSavedBuffer;
//MDCT Data:
int iLongFFTSize;
int iShortFFTSize;
float*pfReal;
float*pfImag;
float*pfRealLongTwiddle;
float*pfImagLongTwiddle;
float*pfRealShort;
float*pfImagShort;
float*pfRealShortTwiddle;
float*pfImagShortTwiddle;
};
#endif