www.pudn.com > JpegTest.rar > JGLOBALS.H

 
static BYTE bytenew=0; // The byte that will be written in the JPG file 
static SBYTE bytepos=7; //bit position in the byte we write (bytenew) 
			//should be<=7 and >=0 
static WORD mask[16]={1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768}; 
 
// The Huffman tables we'll use: 
static bitstring YDC_HT[12]; 
static bitstring CbDC_HT[12]; 
static bitstring YAC_HT[256]; 
static bitstring CbAC_HT[256]; 
 
static BYTE *category_alloc; 
static BYTE *category; //Here we'll keep the category of the numbers in range: -32767..32767 
static bitstring *bitcode_alloc; 
static bitstring *bitcode; // their bitcoded representation 
 
//Precalculated tables for a faster YCbCr->RGB transformation 
// We use a SDWORD table because we'll scale values by 2^16 and work with integers 
static SDWORD YRtab[256],YGtab[256],YBtab[256]; 
static SDWORD CbRtab[256],CbGtab[256],CbBtab[256]; 
static SDWORD CrRtab[256],CrGtab[256],CrBtab[256]; 
static float fdtbl_Y[64]; 
static float fdtbl_Cb[64]; //the same with the fdtbl_Cr[64] 
 
colorRGB *RGB_buffer; //image to be encoded 
WORD Ximage,Yimage;// image dimensions divisible by 8 
static SBYTE YDU[64]; // This is the Data Unit of Y after YCbCr->RGB transformation 
static SBYTE CbDU[64]; 
static SBYTE CrDU[64]; 
static SWORD DU_DCT[64]; // Current DU (after DCT and quantization) which we'll zigzag 
static SWORD DU[64]; //zigzag reordered DU which will be Huffman coded 
 
FILE *fp_jpeg_stream;