www.pudn.com > AvsVideoCodec.rar > block.h

/* 
***************************************************************************** 
* COPYRIGHT AND WARRANTY INFORMATION 
* 
* Copyright 2003, Advanced Audio Video Coding Standard, Part II 
* 
* DISCLAIMER OF WARRANTY 
* 
* The contents of this file are subject to the Mozilla Public License 
* Version 1.1 (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.mozilla.org/MPL/ 
* 
* Software distributed under the License is distributed on an "AS IS" 
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the 
* License for the specific language governing rights and limitations under 
* the License. 
*                      
* THIS IS NOT A GRANT OF PATENT RIGHTS - SEE THE AVS PATENT POLICY. 
* The AVS Working Group doesn't represent or warrant that the programs 
* furnished here under are free of infringement of any third-party patents. 
* Commercial implementations of AVS, including shareware, may be 
* subject to royalty fees to patent holders. Information regarding 
* the AVS patent policy for standardization procedure is available at  
* AVS Web site http://www.avs.org.cn. Patent Licensing is outside 
* of AVS Working Group. 
* 
* The Original Code is Reference Software for China National Standard  
* GB/T 20090.2-2006 (short for AVS-P2 or AVS Video) at version RM52J. 
* 
* The Initial Developer of the Original Code is Video subgroup of AVS 
* Workinggroup (Audio and Video coding Standard Working Group of China). 
* Contributors:   Guoping Li,    Siwei Ma,    Jian Lou,    Qiang Wang ,  
*   Jianwen Chen,Haiwu Zhao,  Xiaozhen Zheng, Junhao Zheng, Zhiming Wang 
*  
****************************************************************************** 
*/ 
 
 
/* 
************************************************************************************* 
* File name:  
* Function:  
* 
************************************************************************************* 
*/ 
 
#include "global.h" 
#include "defines.h" 
 
#define NUM_2D_TABLES 4 
#define CODE2D_ESCAPE_SYMBOL 59 
 
// ======================================================== 
// external variables 
// ======================================================== 
extern const int V[QUANT_PERIOD][6];  //!< De-Quantization table 
extern const int DQMAP[4][4];          //!< Mapping the proper de-quantization value for coefficient position 
extern const int N[2];                //!< Dequantization normalization 
extern const int SCAN[2][64][2];      //!< Scan positions. Positions are stored as (pix,lin). 
extern const char AVS_2D_VLC[NUM_2D_TABLES][16][8];  //   Inter, Intra0-13, Intra14-21, Intra22-31 
extern const unsigned short int cbp_blk_masks[4]; 
extern char       AVS_2D_VLC_dec[NUM_2D_TABLES][64][2]; //   inverse of last table. generated automatically in read_coef_AVS() 
//Lou 1014 extern const byte QP_SCALE_CR[52] ; 
extern const byte QP_SCALE_CR[64] ; 
extern const int AVS_VS_SCAN[64][2]; 
extern const int AVS_NS_SCAN[64][2]; 
 
extern char       AVS_2DVLC_INTRA_dec[7][64][2]; 
extern char       AVS_2DVLC_INTER_dec[7][64][2]; 
extern char       AVS_2DVLC_CHROMA_dec[5][64][2]; 
extern const char AVS_2DVLC_INTRA[7][26][27]; 
extern const char AVS_2DVLC_INTER[7][26][27]; 
extern const char AVS_2DVLC_CHROMA[5][26][27]; 
 
extern const char VLC_Golomb_Order[3][7][2];          //qwang 11.29 
extern const char MaxRun[3][7];                          // added by dj 
extern const char RefAbsLevel[19][26];                   // added by dj 
 
// functions 
void inv_transform_B8  (short curr_blk[B8_SIZE][B8_SIZE]); 
void get_curr_blk      (int block8x8,struct img_par *img, short curr_blk[B8_SIZE][B8_SIZE]); 
void idct_dequant_B8   (int block8x8, 
                        int qp,                         // Quantization parameter 
                        short curr_blk[B8_SIZE][B8_SIZE], 
                        struct img_par *img 
                        ); 
 
int intrapred(struct img_par *img,int img_x,int img_y); 
void readLumaCoeff_B8(int block8x8, struct inp_par *inp, struct img_par *img); 
void readChromaCoeff_B8(int block8x8, struct inp_par *inp, struct img_par *img);