#include <stdio.h>
#include <malloc.h>
#include <math.h>
#include <stdlib.h>
#define PI 3.1415927
#define widthbytes(i) ((i+31)/32*4)
int sampleYH,sampleYV,sampleUH,sampleUV,sampleVH,sampleVV;
int HYtoU,VYtoU,HYtoV,VYtoV,YinMCU,UinMCU,VinMCU;
int compressnum=0,Qt[3][64],*YQt,*UQt,*VQt,codepos[4][16],codelen[4][16];
unsigned char compressindex[3],YDCindex,YACindex,UVDCindex,UVACindex;
unsigned char HufTabindex,And[9]={0,1,3,7,0xf,0x1f,0x3f,0x7f,0xff};
unsigned int codevalue[4][256],hufmax[4][16],hufmin[4][16];
int bitpos=0,curbyte=0,run=0,value=0,MCUbuffer[10*64],blockbuffer[64];
int ycoef=0,ucoef=0,vcoef=0,intervalflag=0,interval=0,restart=0;
long Y[4*64],U[4*64],V[4*64],QtZMCUbuffer[10*64];
unsigned long imgwidth=0,imgheight=0,width=0,height=0,linebytes;
int Z[8][8]={{0,1,5,6,14,15,27,28},{2,4,7,13,16,26,29,42},
{3,8,12,17,25,30,41,43},{9,11,18,24,31,40,44,53},
{10,19,23,32,39,45,52,54},{20,22,33,38,46,51,55,60},
{21,34,37,47,50,56,59,61},{35,36,48,49,57,58,62,63}};
struct{
unsigned char type[2];
long size;
long reserved;
long offset;
}head;
struct{
long size;
long width;
long height;
int plane;
int bitcount;
long compression;
long imagesize;
long xpels;
long ypels;
long colorused;
long colorimportant;
}bmp;
void error(char *s)
{
printf("%s\n",s);
exit(1);
}
void makebmpheader(FILE *fp)
{
int i,j;
unsigned long colorbits,imagebytes;
colorbits=24;
linebytes=widthbytes(colorbits*imgwidth);
imagebytes=(unsigned long)imgheight*linebytes;
head.size=imagebytes+0x36;
head.offset=0x36;
fwrite(&head,sizeof(head),1,fp);
bmp.size=0x28;
bmp.width=(long)imgwidth;
bmp.height=(long)imgheight;
bmp.plane=1L;
bmp.bitcount=colorbits;
bmppression=0;
bmp.imagesize=imagebytes;
bmp.xpels=0xece;
bmp.ypels=0xec4;
fwrite(&bmp,sizeof(bmp),1,fp);
for(j=0;j<imgheight;j++)
for(i=0;i<linebytes;i++)
fputc(0,fp);
}
void initialize(FILE *fp)
{ 水上步行器
unsigned char *p,*q,hfindex,qtindex,number;
int i,j,k,finish=0,huftab1,huftab2,huftabindex,count;
纸扇unsigned int length,flag;
fread(&flag,sizeof(unsigned int),1,fp);
if(flag!=0xd8ff)
error("Error
Jpg File format!");
while(!finish) {
fread(&flag,sizeof(unsigned int),1,fp);
fread(&length,sizeof(int),1,fp);
length=((length<<8)|(length>>8))-2;
switch(flag) {
case 0xe0ff:
fseek(fp,length,1);break;
case 0xdbff:
p=malloc(length);
fread(p,length,1,fp);
qtindex=(*p)&0x0f;
q=p+1;
if(length+2<80)
for(i=0;i<64;i++)
Qt[qtindex][i]=(int)*(q++);
else {
for(i=0;i<64;i++)
Qt[qtindex][i]=(int)*(q++);
qtindex=*(q++)&0x0f;
for(i=0;i<64;i++)
Qt[qtindex][i]=(int)*(q++);
}
free(p);break;
case 0xc0ff:
p=malloc(length);
fread(p,length,1,fp);
imgheight=((*(p+1))<<8)+(*(p+2));
imgwidth=((*(p+3))<<8)+(*(p+4));
compressnum=*(p+5);
if((compressnum!=1)&&(compressnum!=3))
error("Error Jpg File format!");
if(compressnum==3) {
compressindex[0]=*(p+6);
sampleYH=(*(p+7))>>4;
sampleYV=(*(p+7))&0x0f;
YQt=(int *)Qt[*(p+8)];
compressindex[1]=*(p+9);
sampleUH=(*(p+10))>>4;
sampleUV=(*(p+10))&0x0f;
UQt=(int *)Qt[*(p+11)];
compressindex[2]=*(p+12);
sampleVH=(*(p+13))>>4;
sampleVV=(*(p+13))&0x0f;
VQt=(int *)Qt[*(p+14)];
}
else {
compressindex[0]=*(p+6);
sampleYH=(*(p+7))>>4;
sampleYV=(*(p+7))&0x0f;
YQt=(int *)Qt[*(p+8)];
compressindex[1]=*(p+6);
sampleUH=1;
sampleUV=1;
UQt=(int *)Qt[*(p+8)];
compressindex[2]=*(p+6);
sampleVH=1;
sampleVV=1;
VQt=(int *)Qt[*(p+8)];
}
free(p);break;
case 0xc4ff:
p=malloc(length+1);
fread(p,length,1,fp);
p[length]=0xff;
if(length+2<0xd0) {
huftab1=(int)(*p)>>4;
huftab2=(int)(*p)&0x0f;
huftabindex=huftab1*2+huftab2;
q=p+1;
for(i=0;i<16;i++)
codelen[huftabindex][i]=(int)(*(q++));
j=0;
for(i=0;i<16;i++)
if(codelen[huftabindex][i]!=0) {
k=0;
while(k<codelen[huftabindex][i]) {
codevalue[huftabindex][k+j]=(int)(*(q++));
k++;
}
j+=k;
}
i=0;
while(codelen[huftabindex][i]==0) i++;
for(j=0;j<i;j++) {
hufmin[huftabindex][j]=0;
hufmax[huftabindex][j]=0;
}
hufmin[huftabindex][i]=0;
hufmax[huftabindex][i]=codelen[huftabindex][i]-1;
for(j
=i+1;j<16;j++) {
hufmin[huftabindex][j]=(hufmax[huftabindex][j-1]+1)<<1;
hufmax[huftabindex][j]=hufmin[huftabindex][j]+codelen[huftabindex][j]-1;
}
codepos[huftabindex][0]=0;
for(j=1;j<16;j++)
codepos[huftabindex][j]=codelen[huftabindex][j-1]+codepos[huftabindex][j-1];
}
else {
hfindex=*p;
while(hfindex!=0xff) {
huftab1=(int)hfindex>>4;
huftab2=(int)hfindex&0x0f;
huftabindex=huftab1*2+huftab2;
q=p+1;
count=0;
for(i=0;i<16;i++) {
codelen[huftabindex][i]=(int)(*(q++));
count+=codelen[huftabindex][i];
}
count+=17;
j=0;
for(i=0;i<16;i++)
if(codelen[huftabindex][i]!=0) {
k=0;
while(k<codelen[huftabindex][i]) {
codevalue[huftabindex][k+j]=(int)(*(q++));
k++;
}
j+=k;
}
i=0;
while(codelen[huftabindex][i]==0) i++;
for(j=0;j<i;j++) {
hufmin[huftabindex][j]=0;
hufmax[huftabindex][j]=0;
}
hufmin[huftabindex][i]=0;
hufmax[huftabindex][i]=codelen[huftabindex][i]-1;
for(j=i+1;j<16;j++) {
hufmin[huftabindex][j]=(hufmax[huftabindex][j-1]+1)<<1;
hufmax[huftabindex][j]=hufmin[huftabindex][j]+codelen[huftabindex][j]-1;
}
codepos[huftabindex][0]=0;
智能低压
开关柜for(j=1;j<16;j++)
codepos[huftabindex][j]=codelen[huftabindex][j-1]+codepos[huftabindex][j-1];
p+=count;
hfindex=*p;
cn-m}
p-=length;
}
free(p);break;
case 0xddff:
p=malloc(length);
fread(p,length,1,fp);
restart=((*p)<<8)|(*(p+1));
free(p);break;
case 0xdaff:
p=malloc(length*sizeof(unsigned char));
fread(p,length,1,fp);
number=*p;
if(number!=compressnum)
飞机加油车
error("Error Jpg File format!"); q=p+1;
for(i=0;i<compressnum;i++) {
if(*q==compressindex[0]) {
YDCindex=(*(q+1))>>4;
YACindex=((*(q+1))&0x0f)+2;
}
else {
UVDCindex=(*(q+1))>>4;
UVACindex=((*(q+1))&0x0f)+2;
}
q+=2;
}
finish=1;
free(p);break;
case 0xd9ff:
error("Error Jpg File format!");break;
default:
if((flag&0xf000)!=0xd000)
fseek(fp,length,1);
break;
}
}
染料敏化太阳能
电池}
void savebmp(FILE *fp)
{
int i,j;
unsigned
char r,g,b;
long y,u,v,rr,gg,bb;
for(i=0;i<sampleYV*8;i++) {
if((height+i)<imgheight) {
fseek(fp,(unsigned long)(imgheight-height-i-1)*linebytes+3*width+54,0);
for(j=0;j<sampleYH*8;j++) {
if((width+j)<imgwidth) {
y=Y[i*8*sampleYH+j];
u=U[(i/VYtoU)*8*sampleYH+j/HYtoU];
v=V[(i/VYtoV)*8*sampleYH+j/HYtoV];
/*rr=y+((359*v)>>8;
gg=y-((88*u-183*v)>>8);
bb=((y<<8)+301*u)>>8; */
rr=(long)(y+1.402*v);
gg=(long)(y-0.34414*u-0.71414*v);
bb=(long)(y+1.772*u);
r=(unsigned char)rr;
g=(unsigned char)gg;
b=(unsigned char)bb;
if(rr&0xffffff00) if (rr>255) r=255; else if (rr<0) r=0;
if(gg&0xffffff00) if (gg>255) g=255; else if (gg<0) g=0;
if(bb&0xffffff00) if (bb>255) b=255; else if (bb<0) b=0;
fputc(b,fp);fputc(g,fp);fputc(r,fp);
}
else break;
}
}
else break;
}
}
unsigned char readbyte(FILE *fp)
{
unsigned char c;
c=fgetc(fp);
if(c==0xff)
fgetc(fp);
bitpos=8;
curbyte=c;
return c;
}
int DecodeElement(FILE *fp)
{
int codelength;
long thiscode,tempcode;
unsigned int temp,new;
unsigned char hufbyte,runsize,tempsize,sign;
unsigned char newbyte,lastbyte;
if(bitpos>=1) {
bitpos--;
thiscode=(unsigned char)curbyte>>bitpos;
curbyte=curbyte&And[bitpos];
}
else {
lastbyte=readbyte(fp);
bitpos--;
newbyte=curbyte&And[bitpos];
thiscode=lastbyte>>7;
curbyte=newbyte;
}
codelength=1;
while((thiscode<hufmin[HufTabindex][codelength-1])||
(codelen[HufTabindex][codelength-1]==0)||
(thiscode>hufmax[HufTabindex][codelength-1])) {
if(bitpos>=1) {
bitpos--;
tempcode=(unsigned char)curbyte>>bitpos;
curbyte=curbyte&And[bitpos];
}
else {
lastbyte=readbyte(fp);
bitpos--;
newbyte=curbyte&And[bitpos];
tempcode=(unsigned char)lastbyte>>7;
curbyte=newbyte;
}
thiscode=(thiscode<<1)+tempcode;
codelength++;
if(codelength>16)
error("Error Jpg File format!");
}
temp=thiscode-hufmin[HufTabindex][codelength-1]+codepos[HufTabindex][codelength-1];
hufbyte=(unsigned char)codevalue[HufT
abindex][temp];
run=(int)(hufbyte>>4);
runsize=hufbyte&0x0f;
if(runsize==0) {
value=0;
return 1;
}
tempsize=runsize;
if(bitpos>=runsize) {
bitpos-=runsize;
new=(unsigned char)curbyte>>bitpos;
curbyte=curbyte&And[bitpos];
}
else {
new=curbyte;
tempsize-=bitpos;
while(tempsize>8) {
lastbyte=readbyte(fp);
new=(new<<8)+(unsigned char)lastbyte;
tempsize-=8;
}
lastbyte=readbyte(fp);
bitpos-=tempsize;
new=(new<<tempsize)+(lastbyte>>bitpos);
curbyte=lastbyte&And[bitpos];
}
sign=new>>(runsize-1);
if(sign)
value=new;
else {
new=new^0xffff;
temp=0xffff<<runsize;
value=-(int)(new^temp);
}
return 1;
}
int HufBlock(FILE *fp,unsigned char dchufindex,
unsigned char achufindex)
{
int i,count=0;
HufTabindex=dchufindex;
if(DecodeElement(fp)!=1)
return 0;
blockbuffer[count++]=value;
HufTabindex=achufindex;
while (count<64) {
if(DecodeElement(fp)!=1)
return 0;
if((run==0)&&(value==0)) {
for(i=count;i<64;i++)
blockbuffer[i]=0;
count=64;
}
else {
for(i=0;i<run;i++)
blockbuffer[count++]=0;
blockbuffer[count++]=value;
}
}
return 1;
}
int DecodeMCUBlock(FILE *fp)
{
int i,j,*pMCUBuffer;
if(intervalflag) {
fseek(fp,2,1);
ycoef=ucoef=vcoef=0;
bitpos=0;
curbyte=0;
}
switch(compressnum) {
case 3:
pMCUBuffer=MCUbuffer;
for(i=0;i<sampleYH*sampleYV;i++) {
if(HufBlock(fp,YDCindex,YACindex)!=1)
return 0;
blockbuffer[0]=blockbuffer[0]+ycoef;
ycoef=blockbuffer[0];
for(j=0;j<64;j++)
*pMCUBuffer++=blockbuffer[j];
}
for(i=0;i<sampleUH*sampleUV;i++) {
if(HufBlock(fp,UVDCindex,UVACindex)!=1)
return 0;
blockbuffer[0]=blockbuffer[0]+ucoef;
ucoef=blockbuffer[0];
for(j=0;j<64;j++)
*pMCUBuffer++=blockbuffer[j];
}
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