jpeg.rar_YCbCr_jpeg 编码 _jpeg_6b rgb_remote jpeg_yuv to rgb

#include "DataType.h" #include "tables.h" #include "dct.h" #include "flash.h" #define DEBUG #ifdef DEBUG #include "serial.h" #endif #define CIFW 352 #define CIFH 288 LINT8 cha_y[CIFW][CIFH]; LINT8 cha_u[CIFW/2][CIFH/2]; LINT8 cha_v[CIFW/2][CIFH/2]; LINT8 ix=0; LINT8 iy=0; LINT32 ydc=0,udc=0,vdc=0; LINT32 accoder[16][11],acbit[16][11]; LINT32 accoder2[16][11],acbit2[16][11]; ///////////文件部分///////// #define MAXSIZE 262114 //256K typedef struct{ LINT8 buffer[MAXSIZE]; LINT32 fp,lp,CurrentPosition,length; LINT8 CurrentData; LINT8 CurrentBits; }FILEBUF; FILEBUF infile; //输入数据，长度为bits void PutDatatoJpegFile(LINT32 data,LINT8 bits,FILEBUF *buf) { LINT8 CurrentFreeBits=0; while (bits!=0) { if (buf->CurrentBits+bits<8) { buf->CurrentData=(buf->CurrentData<<bits)|data; buf->CurrentBits+=bits; bits=0; } else { CurrentFreeBits=8-buf->CurrentBits; bits=bits-CurrentFreeBits; buf->CurrentData=(buf->CurrentData<<CurrentFreeBits)|data>>bits; buf->buffer[buf->CurrentPosition]=buf->CurrentData; buf->CurrentPosition++; buf->length++; //如果data=0xFF, 加0 if (buf->CurrentData==0xff) { buf->buffer[buf->CurrentPosition]=0; buf->CurrentPosition++; buf->length++; } buf->CurrentData=0; buf->CurrentBits=0; data=data&mask[bits]; } } } ///////////Huffman编码 ///////// typedef struct { LINT32 maxcode[16]; LINT32 mincode[16]; LINT8 ml; unsigned valptr[16]; }DHUFF; typedef struct { LINT8 huffval[256]; }XHUFF; DHUFF dhuff,dhuffdc,dhuff2,dhuffdc2; XHUFF xhuff,xhuffdc,xhuff2,xhuffdc2; void len2huff(LINT8 *lengthtab,DHUFF *dhuff,XHUFF *xhuff,LINT8 *val) { int i,l,k,base=0; dhuff->ml=16; for(i=0;i<dhuff->ml;i++) { dhuff->mincode[i]=0; dhuff->maxcode[i]=0; dhuff->valptr[i]=-1; } for(i=0;i<256;i++) xhuff->huffval[i]=0; i=0; base=0; for(l=0;l<dhuff->ml;l++) { if(lengthtab[l]!=0) { dhuff->mincode[l]=base; dhuff->valptr[l]=i; } for(k=0;k<lengthtab[l];k++) { xhuff->huffval[i]=val[i]; i++; base++; } if(lengthtab[l]!=0)dhuff->maxcode[l]=base-1; base=base*2; } } void iztransfer(LINT32 *array) { LINT32 temp[64],n,x,y; for(n=0;n<64;n++) { x=iztab[2*n]; y=iztab[2*n+1]; temp[n]=array[x*8+y]; } for(n=0;n<64;n++) array[n]=temp[n]; } //量化 void qdata(LINT32 * in,LINT32 * out,LINT8 level) { int i; for(i=0;i<64;i++) { if(in[i]>0) out[i]=in[i]/agraytab[level][i]; else out[i]=in[i]/agraytab[level][i]; } } void quvdata(LINT32 * in,LINT32 * out,LINT8 level) { int i; for(i=0;i<64;i++) { if(in[i]>0) out[i]=in[i]/acolortab[level][i]; else out[i]=in[i]/acolortab[level][i]; } } //从SRAM 0xC0100000读数据到 cha_y[CIFW][CIFH]; //cha_u[CIFW/2][CIFH/2]; cha_v[CIFW/2][CIFH/2]; #ifdef DEBUG void put_num8(unsigned char i) { put_char(((((i>>4) & 0x0f) + '0')> '9' )? ((i>>4) & 0x0f) +'0'+7 : ((i>>4) & 0x0f) +'0' ); put_char((((i & 0x0f) + '0')> '9' )? (i & 0x0f) +'0'+7 : (i & 0x0f) +'0' ); } static void put_num32(int i) { put_num8((unsigned char)(( i>>24) & 0xff)); put_num8( (unsigned char) (i>>16 & 0xff)); put_num8((unsigned char)(( i>>8) & 0xff)); put_num8( (unsigned char) (i & 0xff)); } #endif void readfile(void) { int i,count=0; for (i=0;i<CIFW*CIFH*6/4;i+=6) { //取决于图像的帧格式 cha_y[(i*2/6%CIFW)][(i*2/6/CIFW)*2]=RAM_BYTE(i); cha_y[(i*2/6%CIFW)+1][(i*2/6/CIFW)*2]=RAM_BYTE(i+1); cha_y[(i*2/6%CIFW)][(i*2/6/CIFW)*2+1]=RAM_BYTE(i+2); cha_y[(i*2/6%CIFW)+1][(i*2/6/CIFW)*2+1]=RAM_BYTE(i+3); cha_u[i/6%(CIFW/2)][i/6/(CIFW/2)]=RAM_BYTE(i+4); cha_v[i/6%(CIFW/2)][i/6/(CIFW/2)]=RAM_BYTE(i+5); count++; } } //写编码文件到串行口 void writefile(FILEBUF *buf) { int i; for (i=0;i<=buf->length;i++) { put_num8(buf->buffer[i]); } } LINT8 GetLength(LINT32 in) { int val; if (in<0) val=-in; else val = in; if (val>511) return 10; else if (val>255) return 9; else if (val>127) return 8; else if (val>63) return 7; else if (val>31) return 6; else if (val>15) return 5; else if (val>7) return 4; else if (val>3) return 3; else if (val>1) return 2; else if (val>0) return 1; else return 0; } //从22*18矩阵压缩到8*8,6(4Y+U+V) void mcugen(LINT8 x,LINT8 y) { LINT8 p_array[8][8]; LINT32 dct_array[8][8]; LINT32 q_array[8][8],diff; LINT8 length,flag=0; LINT8 AcCount=1,ZeroCount=0; unsigned int i,j; ///////////////Y1亮度///////////////////////////////////// for(i=0;i<8;i++) for(j=0;j<8;j++) p_array[i][j]=cha_y[x*16+j][y*16+i]; ffdct(&p_array[0][0],&dct_array[0][0]); iztransfer(&dct_array[0][0]); qdata(&dct_array[0][0],&q_array[0][0],5); //DC编码 diff=q_array[0][0]-ydc; ydc=q_array[0][0]; if(diff<0) { diff=-diff; flag=1; } length=GetLength(diff); if(flag==1) { diff=two[length]-1-diff; } PutDatatoJpegFile(dccoder[length],dcbit[length],&infile); PutDatatoJpegFile(diff,length,&infile); //AC编码 while(AcCount<64) { if (q_array[AcCount/8][AcCount%8]==0) { AcCount++; ZeroCount++; if (AcCount==64) { PutDatatoJpegFile(accoder[0][0],acbit[0][0],&infile); } } else { while (ZeroCount>=16) { PutDatatoJpegFile(accoder[15][0],acbit[15][0],&infile); ZeroCount-=16; } flag=0; diff=q_array[AcCount/8][AcCount%8]; if (diff<0) { diff=-diff; flag=1; } length=GetLength(diff); if (flag==1) { diff=two[length]-1-diff; } PutDatatoJpegFile(accoder[ZeroCount][length],acbit[ZeroCount][length],&infile); PutDatatoJpegFile(diff,length,&infile); AcCount++; ZeroCount=0; } } //////////////////////////////Y2///////////////////////////////////////// flag=0; for(i=0;i<8;i++) for(j=0;j<8;j++) p_array[i][j]=cha_y[x*16+8+j][y*16+i]; ffdct(&p_array[0][0],&dct_array[0][0]); iztransfer(&dct_array[0][0]); qdata(&dct_array[0][0],&q_array[0][0],5); //DC编码 diff=q_array[0][0]-ydc; ydc=q_array[0][0]; if(diff<0) { diff=-diff; flag=1; } length=GetLength(diff); if(flag==1) { diff=two[length]-1-diff; } PutDatatoJpegFile(dccoder[length],dcbit[length],&infile); PutDatatoJpegFile(diff,length,&infile); //AC编码 AcCount=1;ZeroCount=0; while(AcCount<64) { if (q_array[AcCount/8][AcCount%8]==0) { AcCount++; ZeroCount++; if (AcCount==64) { PutDatatoJpegFile(accoder[0][0],acbit[0][0],&infile); } } else { while (ZeroCount>=16) { PutDatatoJpegFile(accoder[15][0],acbit[15][0],&infile); ZeroCount-=16; } flag=0; diff=q_array[AcCount/8][AcCount%8]; if (diff<0) { diff=-diff; flag=1; } length=GetLength(diff); if (flag==1) { diff=two[length]-1-diff; } PutDatatoJpegFile(accoder[ZeroCount][length],acbit[ZeroCount][length],&infile); PutDatatoJpegFile(diff,length,&infile); AcCount++; ZeroCount=0; } } //////////////////////////////Y3///////////////////////////////////////// flag=0; for(i=0;i<8;i++) for(j=0;j<8;j++) p_array[i][j]=cha_y[x*16+j][y*16+8+i]; ffdct(&p_array[0][0],&dct_array[0][0]); iztransfer(&dct_array[0][0]); qdata(&dct_array[0][0],&q_array[0][0],5); //DC编码 diff=q_array[0][0]-ydc; ydc=q_array[0][0]; if(diff<0) { diff=-diff; flag=1; } length=GetLength(diff); if(flag==1) { diff=two[length]-1-diff; } PutDatatoJpegFile(dccoder[length],dcbit[length],&infile); PutDatatoJpegFile(diff,length,&infile); //AC编码 AcCount=1;ZeroCount=0; while(AcCount<64) { if (q_array[AcCount/8][AcCount%8]==0) { AcCount++; ZeroCount++; if (AcCount==64) { PutDatatoJpegFile(accoder[0][0],acbit[0][0],&infile); } } else { while