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/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
#ifndef idct_h
#define idct_h
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "mp4dec_lib.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here.
----------------------------------------------------------------------------*/
#define INTEGER_IDCT
#ifdef FAST_IDCT
#ifndef INTEGER_IDCT
#define INTEGER_IDCT
#endif
#endif
#ifdef FAST_IDCT
#ifdef __cplusplus
extern "C"
{
#endif
void idctrow0(int16 *blk, uint8 *pred, uint8 *dst, int width);
void idctrow1(int16 *blk, uint8 *pred, uint8 *dst, int width);
void idctrow2(int16 *blk, uint8 *pred, uint8 *dst, int width);
void idctrow3(int16 *blk, uint8 *pred, uint8 *dst, int width);
void idctrow4(int16 *blk, uint8 *pred, uint8 *dst, int width);
void idctcol0(int16 *blk);
void idctcol1(int16 *blk);
void idctcol2(int16 *blk);
void idctcol3(int16 *blk);
void idctcol4(int16 *blk);
void idctrow0_intra(int16 *blk, PIXEL *comp, int width);
void idctrow1_intra(int16 *blk, PIXEL *comp, int width);
void idctrow2_intra(int16 *blk, PIXEL *comp, int width);
void idctrow3_intra(int16 *blk, PIXEL *comp, int width);
void idctrow4_intra(int16 *blk, PIXEL *comp, int width);
#ifdef __cplusplus
}
#endif
#endif
/* this code assumes ">>" to be a two's-complement arithmetic */
/* right shift: (-2)>>1 == -1 , (-3)>>1 == -2 */
/* a positive real constant is converted to an integer scaled by 2048 */
/* or equivalent to left shift by 11 */
#define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */
#define W2 2676 /* 2048*sqrt(2)*cos(2*pi/16) */
#define W3 2408 /* 2048*sqrt(2)*cos(3*pi/16) */
#define W5 1609 /* 2048*sqrt(2)*cos(5*pi/16) */
#define W6 1108 /* 2048*sqrt(2)*cos(6*pi/16) */
#define W7 565 /* 2048*sqrt(2)*cos(7*pi/16) */
#define W1mW7 2276
#define W1pW7 3406
#define W5mW3 -799
#define mW3mW5 -4017
#define mW2mW6 -3784
#define W2mW6 1568
/* left shift by 11 is to maintain the accuracy of the decimal point */
/* for the transform coefficients (W1,...W7) */
/*----------------------------------------------------------------------------
; EXTERNAL VARIABLES REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; SIMPLE TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; ENUMERATED TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; STRUCTURES TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; GLOBAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; END
----------------------------------------------------------------------------*/
#endif
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