编码出来的jpeg图片只有红，绿色。排查中
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/videodev2.h> //v4l2 头文件
#include <string.h>
#include <sys/mman.h>
#include <linux/fb.h>
#include <math.h>
#define PI 3.1415926
#define pic_width 16 //1280*720 640*360 960*540 320*240 424*240 848*480 640*480
#define pic_heigth 16
#define filename "/home/wzpc/Pictures/16*16.yuv"
#define file1 "/home/wzpc/Pictures/4.jpeg" //借用成品图片的量化表
static unsigned char o_bit[1000000]={};
static int to=0;
int main(void) {
//------ali--------------------------------------
int ali(int i,int out[2]){ //out[1]=len out[0]=int
// int i=-5;
int o=-1; //如果输出负数无意义
char len=-1; //如果输出负数无意义
if(i==0){
len=0;
o=0;
}
if(i==-1){
len=1;
o=0;
}
if(i==1){
len=1;
o=1;
}
if((i>=2)&&(i<=32767)){ //二进制位数0-16位
for(int a=0;a<16;a++){
if((i>=pow(2,a))&&(i<pow(2,(a+1)))){
len=a+1;
o=i;
}
}
}
if((i>=-32767)&&(i<=-2)){
for(int a=0;a<16;a++){
if((i<=-pow(2,a))&&(i>-pow(2,(a+1)))){
len=a+1;
o=i+pow(2,(a+1))-1;
}
}
}
// printf("len:%d o:%d\n",len,o);
out[1]=len;
out[0]=o;
return 0;
}
//-------------Y_DC--------------------------------
int hfm_ydc(unsigned char i,int out[2]){ //out[1]=len out[0]=int
if(i==0){
out[1]=2;
out[0]=0b00;
}
if(i==1){
out[1]=3;
out[0]=0b010;
}
if(i==2){
out[1]=3;
out[0]=0b011;
}
if(i==3){
out[1]=3;
out[0]=0b100;
}
if(i==4){
out[1]=3;
out[0]=0b101;
}
if(i==5){
out[1]=3;
out[0]=0b110;
}
if(i==6){
out[1]=4;
out[0]=0b1110;
}
if(i==7){
out[1]=5;
out[0]=0b11110;
}
if(i==8){
out[1]=6;
out[0]=0b111110;
}
if(i==9){
out[1]=7;
out[0]=0b1111110;
}
if(i==10){
out[1]=8;
out[0]=0b11111110;
}
if(i==11){
out[1]=9;
out[0]=0b111111110;
}
return 0;
}
//-------------UV_DC-----------------------------------
int hfm_uvdc(unsigned char i,int out[2]){ //out[1]=len out[0]=int
if(i==0){
out[1]=2;
out[0]=0;
}
if(i==1){
out[1]=2;
out[0]=0b01;
}
if(i==2){
out[1]=2;
out[0]=0b10;
}
if(i==3){
out[1]=3;
out[0]=0b110;
}
if(i==4){
out[1]=4;
out[0]=0b1110;
}
if(i==5){
out[1]=5;
out[0]=0b11110;
}
if(i==6){
out[1]=6;
out[0]=0b111110;
}
if(i==7){
out[1]=7;
out[0]=0b1111110;
}
if(i==8){
out[1]=8;
out[0]=0b11111110;
}
if(i==9){
out[1]=9;
out[0]=0b111111110;
}
if(i==10){
out[1]=10;
out[0]=0b1111111110;
}
if(i==11){
out[1]=11;
out[0]=0b11111111110;
}
return 0;
}
//---------霍夫曼编码Y_AC-----------------------------------
int hfm_yac(unsigned char i_0,unsigned char i_len,unsigned int out[2]){
// unsigned char i_0=0xf; //out[1]=len out[0]=int
// unsigned char i_len=0xa;
unsigned int len;
unsigned int o;
unsigned char zj=i_0*16+i_len; //合成一个字节
unsigned char ws[16]={0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d};
unsigned char zh[162]={0x1, 0x2, 0x3, 0x0, 0x4, 0x11, 0x5,0x12,0x21,0x31,0x41,0x6, 0x13,0x51,0x61,0x7,
0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08,0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,
0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28,
0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,
0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,
0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89,
0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,
0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2,
0xe3,0xe4,0xe5,0xe6,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,
0xf9,0xfa
};
int cx_ws,cx_b;
unsigned char hfm[17][0x7d]={};
int t=0;
for(int a=0;a<16;a++){ //把要编码的162个数按位数分为16个数组，二位一组....16位一组
if(ws[a]==0){
continue;
}
for(int b=0;b<ws[a];b++){
hfm[a+1][b]=zh[t];
t++;
}
}
for(int a=0;a<16;a++){ //查询输入数的位数和在所在组的顺序，组内顺序从0开始
if(ws[a]==0){
continue;
}
for(int b=0;b<ws[a];b++){
if( hfm[a+1][b]==zj){
cx_ws=a+1; //得到输入数二进制位数，根据此数到相依位数的数组查询
cx_b=b; //输入数在按位数分组的数组中所在的位置，从0开始
break;
}
}
}
int o_js=0; //每一组的第一个数的值
if(cx_ws==2){
o_js=0b00;
}
if(cx_ws==3){
o_js=0b100;
}
if(cx_ws==4){
o_js=0b1010;
}
if(cx_ws==5){
o_js=0b11010;
}
if(cx_ws==6){
o_js=0b111010;
}
if(cx_ws==7){
o_js=0b1111000;
}
if(cx_ws==8){
o_js=0b11111000;
}
if(cx_ws==9){
o_js=0b111110110;
}
if(cx_ws==10){
o_js=0b1111110110;
}
if(cx_ws==11){
o_js=0b11111110110;
}
if(cx_ws==12){
o_js=0b111111110100;
}
if(cx_ws==15){
o_js=0b111111111000000;
}
if(cx_ws==16){
o_js=0b1111111110000010;
}
len=cx_ws;
o=o_js+cx_b;
out[1]=len;
out[0]=o;
return 0;
}
//---------UV_AC---------------------------------
int hfm_uvac(unsigned char i_0,unsigned char i_len,unsigned int out[2]){
// unsigned char i_0=0xf; //out[1]=len out[0]=int
// unsigned char i_len=0xa;
unsigned int len;
unsigned int o;
unsigned char zj=i_0*16+i_len; //合成一个字节
unsigned char ws[16]={0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77};
unsigned char zh[162]={
0x00, 0x1, 0x2, 0x3, 0x11, 0x4, 0x5, 0x21, 0x31, 0x6, 0x12, 0x41, 0x51, 0x7, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x8, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x9, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
};
int cx_ws,cx_b;
unsigned char hfm[17][0x7d]={};
int t=0;
for(int a=0;a<16;a++){ //把要编码的162个数按位数分为16个数组，二位一组....16位一组
if(ws[a]==0){
continue;
}
for(int b=0;b<ws[a];b++){
hfm[a+1][b]=zh[t];
t++;
}
}
for(int a=0;a<16;a++){ //查询输入数的位数和在所在组的顺序，组内顺序从0开始
if(ws[a]==0){
continue;
}
for(int b=0;b<ws[a];b++){
if( hfm[a+1][b]==zj){
cx_ws=a+1; //得到输入数二进制位数，根据此数到相依位数的数组查询
cx_b=b; //输入数在按位数分组的数组中所在的位置，从0开始
break;
}
}
}
int o_js=0; //每一组的第一个数的值
if(cx_ws==2){
o_js=0b00;
}
if(cx_ws==3){
o_js=0b100;
}
if(cx_ws==4){
o_js=0b1010;
}
if(cx_ws==5){
o_js=0b11000;
}
if(cx_ws==6){
o_js=0b111000;
}
if(cx_ws==7){
o_js=0b1111000;
}
if(cx_ws==8){
o_js=0b11110110;
}
if(cx_ws==9){
o_js=0b111110100;
}
if(cx_ws==10){
o_js=0b1111110110;
}
if(cx_ws==11){
o_js=0b11111110110;
}
if(cx_ws==12){
o_js=0b111111110100;
}
if(cx_ws==14){
o_js=0b11111111100000;
}
if(cx_ws==15){
o_js=0b111111111000010;
}
if(cx_ws==16){
o_js=0b1111111110001000;
}
len=cx_ws;
o=o_js+cx_b;
out[1]=len;
out[0]=o;
return 0;
}
//-----------FDCT()函数------------------------------------
int fdct( char (*i)[8], int(*o)[8] ) { //i 为输入 o 为参数传入的输出转换后的数据
double s;
double au;
double av;
for (int u = 0; u < 8; u++) {
for (int v = 0; v < 8; v++) {
for (int y = 0; y < 8; y++) {
for (int x = 0; x < 8; x++) {
s = s + (1.0 / 4) * i[y][x] * cos((2 * y + 1) * u * PI / 16) * cos((2 * x + 1) * v * PI / 16);
}
}
if (u == 0) {
au = 1.0 / sqrt(2);
} else {
au = 1.0;
}
if (v == 0) {
av = 1.0 / sqrt(2);
} else {
av = 1.0;
}
s = s * au * av; //-30.1856
int s1 = round(s * 100); //-3019
s = s1 / 100.0; //-30.19
o[u][v] = s; //double 转为char 类型
s = 0;
}
}
return 0;
}
//-----------规范RLC格式---------------------
int zl(int len,int (*i)[2],int (*o)[2]){
int t=0; //如果中间有一次超过15个0，o的下标要加一，因为增加了（15,0）
for(int a=0;a<len;a++){
if((a<len)&&(i[a][1]>=16)&&(i[a][0]!=0)){
o[a+t][0]=0;
o[a+t][1]=15;
o[a+1+t][0]=i[a][0];
o[a+1+t][1]=i[a][1]-15;
t++;
}
if((a<len)&&(i[a][1]<16)){
memcpy(&(o[a+t][0]),&(i[a][0]),8); //一行为单位复制
}
if((a==len)&&(i[a][0]==0)){
o[a+t][0]=0;
o[a+t][1]=0;
break;
}
}
return len+t;
}
//-----------去0-----------------------------
int q0(int i[64], int (*o)[2]) {
int t = 0; //输出数组序号
int z = 0; //计算连续的0
for (int a = 0; a < 64; a++) { // a
if ((i[a] == 0) && (i[a + 1] == 0) && ((a + 1) < 63)) { //000001
z++;
} // a
if ((i[a] == 0) && (i[a + 1] == 0) && ((a + 1) == 63)){ //0000结束
z++; //本次的0
o[t][0] =0;
o[t][1] = z+1; //加a+1的0
break; //判断完成
} // a
if ((i[a] == 0) && (i[a + 1] != 0)) { //000100
z++; //加上本次的一个0
o[t][0] = i[a + 1];
o[t][1] = z;
z = 0; //清0,计算下次的连续0
t++;
a = a + 1;
}
if ((i[a] != 0)&&(a==0)) { //第一个数非0
o[t][0] = i[a];
o[t][1] = 0;
t++;
}
if ((a>0)&&(i[a] != 0)&&(i[a-1]!=0)) { //防止第3种重复读取，这种是读取连续的非0
o[t][0] = i[a];
o[t][1] = 0;
t++;
}
}
return t+1;
}
//--------Z 排序--------------------------------
int zz(int (*i)[8], int o[64]) {
int zb[64] = {0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,12,19,26,33,40,48,41,34,27,20,13,6,
7,14,21,28,35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,58,59,52,45,38,31,39,46,53,60,61,54,47,
55,62,63
};
int *p = (int *)i;
for (int a = 0; a < 64; a++) {
int c = zb[a];
o[a] = p[c];
}
return 0;
}
// -----量化函数---------------
int lh(int (*i)[8], char (*lhb)[8], int (*o)[8]) {
for (int a = 0; a < 8; a++) {
for (int b = 0; b < 8; b++) {
o[a][b] = round((i[a][b]) / (lhb[a][b]));
}
}
return 0;
}
//---------start-------------------------------------
FILE *f1 = fopen(file1, "rb"); //如用mmap 必须以读写方式打开文件
if (f1 == NULL) {
puts("filename error");
exit(-1);
}
fseek(f1, 0, SEEK_END);
int len1 = ftell(f1);
fseek(f1, 0, SEEK_SET);
int fd1 = fileno(f1);
unsigned char *mp1 = mmap(NULL, len1, PROT_READ, MAP_SHARED, fd1, 0); //必须要读，写
//---------读量化表-------------------------------
char lh00[64] = {}; //提取量化表
char lh10[64] = {};
for (int a = 0; a < len1; a++) {
if ((mp1[a] == 0xff) && (mp1[a + 1] == 0xdb) && (mp1[a + 2] == 0)) {
for (int b = 0; b < 65; b++) {
if (mp1[a + b + 4] == 0) {
memcpy(lh00, &(mp1[a + b + 5]), 64);
}
if (mp1[a + b + 4] == 1) {
memcpy(lh10, &(mp1[a + b + 5]), 64);
}
}
// printf("\n");
}
}
//---------------------------------------------------------------------------
FILE *f = fopen(filename, "rb"); //如用mmap 必须以读写方式打开文件
if (f == NULL) {
puts("filename error");
exit(-1);
}
fseek(f, 0, SEEK_END);
int len_file = ftell(f);
fseek(f, 0, SEEK_SET);
int fd = fileno(f);
unsigned char *mp = mmap(NULL, len_file, PROT_READ, MAP_SHARED, fd, 0); //必须要读，写
char yfl[pic_heigth*pic_width]={};
char ufl[pic_heigth*pic_width/4]={};
char vfl[pic_heigth*pic_width/4]={};
for(int a=0;a<256;a++){
yfl[a]=mp[a];
}
for(int a=0;a<64;a++){
ufl[a]=mp[a+256];
}
for(int a=0;a<64;a++){
vfl[a]=mp[a+256+64];
}
//-------Y 分割8×8----------------------------
int p=0; //输出数组序号
char y64[4][64]={}; //输出数组
for(int y=0;y<16;y=y+8){ //提取左上角点的垂直数据
for(int x=0;x<16;x=x+8){ //提取左上角点的水平数据
int n=0; //每一个数组下标取值 0-15
for(int a=0;a<8;a++){
for(int b=0;b<8;b++){
y64[p][n]=yfl[16*(a+y)+(b+x)];
n++;
}
}
p++;
}
}
/*
//--------------FDCY Y- U V----------------------------
unsigned char y[8][8]={};
memcpy(y,&(y64[0][0]),64); //4个Y 0-3 :y64[0][0] ,y64[1][0] ,y64[2][0], y64[3][0]
unsigned char u[8][8]={};
memcpy(u,&ufl,64);
unsigned char v[8][8]={};
memcpy(v,&vfl,64);
int y_fdct[8][8] = {};
fdct(y,y_fdct);
int u_fdct[8][8] = {};
fdct(u, u_fdct);
int v_fdct[8][8] = {};
fdct(v, v_fdct);
//----------------量化 Y U V -----------------------------------
//借用成品jpg图片量化表，lh0,lh1
char (*lh0)[8] = (char (*)[8])lh00;
char (*lh1)[8] = (char (*)[8])lh10;
int y_lh[8][8] = {};
int u_lh[8][8] = {};
int v_lh[8][8] = {};
lh(y_fdct, lh0, y_lh);
lh(u_fdct, lh1, u_lh);
lh(v_fdct, lh1, v_lh);
//---------Z排序--------------------------
int y_z[64] = {};
int u_z[64] = {};
int v_z[64] = {};
zz(y_lh, y_z);
zz(u_lh, u_z);
zz(v_lh, v_z);
//--------去0-------------------------
int y_0[64][2] = {};
int u_0[64][2] = {};
int v_0[64][2] = {};
int len_y_0 = q0(y_z, y_0);
int len_u_0 = q0(u_z, u_0);
int len_v_0 = q0(v_z, v_0);
//-----整理规范------------------------
int y_zl[64][2]={}; //定义是必须指定数组内存大小，下标不能用变量，64是此数组的最大值
int u_zl[64][2]={}; //zl[1]=0的个数 zl[0]=int 系数
int v_zl[64][2]={};
int len_y_zl=zl(len_y_0,y_0,y_zl);
int len_u_zl=zl(len_u_0,u_0,u_zl);
int len_v_zl=zl(len_v_0,v_0,v_zl);
*/
//------Y处理函数---------------------------------
int yy(int ysc,char y[8][8]){
int y_fdct[8][8] = {};
fdct(y,y_fdct);
char (*lh0)[8] = (char (*)[8])lh00;
int y_lh[8][8] = {};
lh(y_fdct, lh0, y_lh);
int y_z[64] = {};
zz(y_lh, y_z);
int y_0[64][2] = {};
int len_y_0 = q0(y_z, y_0);
int y_zl[64][2]={};
int len_y_zl=zl(len_y_0,y_0,y_zl);
//--------Y-DC----------------------------------
int ydc[2]={}; //ydc[1]=len ydc[0]=int
int q=y_zl[0][0]-ysc;
ali(q,ydc); //处理Y_DC
int ydc_hfm[2]={}; //ydc_hfm[1]=len
hfm_ydc(ydc[1],ydc_hfm);
int ls=(ydc_hfm[0]<<ydc[1])|ydc[0]; //组合成一int（12位）
for(int a=(ydc[1]+ydc_hfm[1]);a>0;a--){
o_bit[to]=(ls&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
//-------Y-AC-------------------------------
for(int a=1;a<len_y_zl;a++){
int yac[2]={};
ali(y_zl[a][0],yac);
unsigned int yac_h[2]={};
hfm_yac(y_zl[a][1],yac[1],yac_h);
int ls=(yac_h[0]<<yac[1])|yac[0];
for(int a=(yac[1]+yac_h[1]);a>0;a--){
o_bit[to]=(ls&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
}
return y_zl[0][0];
}
int ydiff=0;
for(int a=0;a<4;a++){
char y[8][8]={};
memcpy(y,&(y64[a][0]),64); //4个Y8×8
ydiff=yy(ydiff,y);
}
char (*lh1)[8] = (char (*)[8])lh10;
//-----处理U--------------------------------
char u[8][8]={};
memcpy(u,&ufl,64);
int u_fdct[8][8] = {};
fdct(u, u_fdct);
int u_lh[8][8] = {};
lh(u_fdct, lh1, u_lh);
int u_z[64] = {};
zz(u_lh, u_z);
int u_0[64][2] = {};
int len_u_0 = q0(u_z, u_0);
int u_zl[64][2]={};
int len_u_zl=zl(len_u_0,u_0,u_zl);
//--------U-DC----------------------------------
int udc[2]={}; //ydc[1]=len ydc[0]=int
int q=u_zl[0][0];
ali(q,udc); //处理Y_DC
int udc_hfm[2]={}; //ydc_hfm[1]=len
hfm_uvdc(udc[1],udc_hfm);
int ls=(udc_hfm[0]<<udc[1])|udc[0]; //组合成一int（12位）
for(int a=(udc[1]+udc_hfm[1]);a>0;a--){
o_bit[to]=(ls&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
//-------U-AC-------------------------------
for(int a=1;a<len_u_zl;a++){
int uac[2]={};
ali(u_zl[a][0],uac);
unsigned int uac_h[2]={};
hfm_uvac(u_zl[a][1],uac[1],uac_h);
int ls2=(uac_h[0]<<uac[1])|uac[0];
for(int a=(uac[1]+uac_h[1]);a>0;a--){
o_bit[to]=(ls2&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
}
//-------V 处理--------------------------------
char v[8][8]={};
memcpy(v,&vfl,64);
int v_fdct[8][8] = {};
fdct(v, v_fdct);
// char (*lh1)[8] = (char (*)[8])lh10;
int v_lh[8][8] = {};
lh(v_fdct, lh1, v_lh);
int v_z[64] = {};
zz(v_lh, v_z);
int v_0[64][2] = {};
int len_v_0 = q0(v_z, v_0);
int v_zl[64][2]={};
int len_v_zl=zl(len_v_0,v_0,v_zl);
//--------V-DC----------------------------------
int vdc[2]={}; //ydc[1]=len ydc[0]=int
int qv=v_zl[0][0];
ali(qv,vdc); //处理Y_DC
int vdc_hfm[2]={}; //ydc_hfm[1]=len
hfm_uvdc(vdc[1],vdc_hfm);
int lsv=(vdc_hfm[0]<<vdc[1])|vdc[0]; //组合成一int（12位）
for(int a=(vdc[1]+vdc_hfm[1]);a>0;a--){
o_bit[to]=(lsv&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
//-------V-AC-------------------------------
for(int a=1;a<len_v_zl;a++){
int vac[2]={};
ali(v_zl[a][0],vac);
unsigned int vac_h[2]={};
hfm_uvac(v_zl[a][1],vac[1],vac_h);
int ls=(vac_h[0]<<vac[1])|vac[0];
for(int a=(vac[1]+vac_h[1]);a>0;a--){
o_bit[to]=(ls&(int)pow(2,(a-1)))>>(a-1); //取ls 每一位数
to++;
}
}
for(int a=0;a<to;a++){
// printf("%d ,",o_bit[a]);
}
// printf("to:%d\n",to); //419
//-------生成jpeg文件-----------------------------
for(int a=0;a<len1;a++){
if((mp1[a]==0xff)){
// printf("%x\n",mp1[a+1]); //670 211
}
}
unsigned char jp[1000]={};
memcpy(jp,mp1,671);
jp[211]=0;
jp[212]=16;
jp[213]=0;
jp[214]=16;
for(int a=0;a<5;a++){
o_bit[to+a]=1;
}
to=to+5; //419+5=424
int k=0;
for(int a=0;a<424;a=a+8){
unsigned char zz=o_bit[a]*128+o_bit[a+1]*64+o_bit[a+2]*32+o_bit[a+3]*16+o_bit[a+4]*8+o_bit[a+5]*4+o_bit[a+6]*4+o_bit[a+7];
if(zz==0xff){
jp[671+k]=zz;
jp[671+k+1]=0;
}else{
jp[671+k]=zz;
}
k++;
}
jp[671+k+1]=0xff;
jp[671+k+2]=0xd9;
FILE *fz=fopen("/home/wzpc/Pictures/zz.jpg","w+b");
fwrite(jp,671+k+2,1,fz);
fclose(fz);
// printf("%x\n",jp[671]);
//---------------------------------------------------
return 0;
}
![[蓝桥杯2020国赛]答疑](https://img-blog.csdnimg.cn/direct/0ba53a20a5ef4cebb65802205af25599.png)
