目前做公司网站有没有用,导购类wordpress cms,室内装修设计网站推荐,wordpress收费主题免费下载骄傲一下#xff0c;经过一个多月的努力#xff0c;终于完成jpeg的全套编码。经验证此程序可以把摄像头yuv信号转为JPG图片。现在的程序还不完美#xff0c;只能对长和宽尺寸是16倍数的信号转码。而且转码速度太慢#xff0c;一帧1280720的图片要2秒多。此程序只能对yuv420…骄傲一下经过一个多月的努力终于完成jpeg的全套编码。经验证此程序可以把摄像头yuv信号转为JPG图片。现在的程序还不完美只能对长和宽尺寸是16倍数的信号转码。而且转码速度太慢一帧1280×720的图片要2秒多。此程序只能对yuv420p编码。
此程序有很多重复的代码主要是为了清晰好查错如三分量的提取处理等阶段可以用一个函数形式来完成减少代码量。
说实话此程序没有实用价值因为压缩时间太长不可能用于摄像头的信号转换查网络说是浮点运算太多要用数学的方法把浮点运算转为乘法和加法的运算所以不想再折腾了转而去学ffmpeg。想借用它的库函数完成摄像头的信号压缩转码。目标是搞一个高速摄像头。
写了这么多博文主要是为了留存以后想再搞又可以用上。还有把学习的思路也备份一下。 下面是全套程序
#include stdio.h
#include stdlib.h
#include string.h
#include sys/mman.h //如果直接读文件到数组也可不用此头文件
#include math.h
#define PI 3.1415926#define pic_width 656
#define pic_heigth 480#define filename /home/wjs/Pictures/sample.yuv
#define file_out /home/wjs/Pictures/wz.jpg //输出文件目录static unsigned char o_bit[900000] {};
static int to 0;int main(void) {//-------JPEG通用量化表--------------------------------unsigned char lhb0[0x45] {0xff, 0xdb, 0, 0x43, 0,16, 11, 10, 16, 24, 40, 51, 61,12, 12, 14, 19, 26, 58, 60, 55,14, 13, 16, 24, 40, 57, 69, 56,14, 17, 22, 29, 51, 87, 80, 62,18, 22, 37, 56, 68, 109, 103, 77,24, 35, 55, 64, 81, 104, 113, 92,49, 64, 78, 87, 103, 121, 120, 101,72, 92, 95, 98, 112, 100, 103, 99 // 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,};unsigned char lhb1[0x45] {0xff, 0xdb, 0, 0x43, 1,17, 18, 24, 47, 99, 99, 99, 99, //17,18,24,4718, 21, 26, 66, 99, 99, 99, 99, //18,21,26,66,24, 26, 56, 99, 99, 99, 99, 99, //24,26,5647, 66, 99, 99, 99, 99, 99, 99, //47,66,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99,99, 99, 99, 99, 99, 99, 99, 99// 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,};//-------JPEG通用霍夫曼表------------------------------unsigned char hfm0[] {0xff, 0xc4, 0, 0x1f, 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb};unsigned char hfm1[] { 255, 196, 0, 181, 16, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125, 1, 2, 3, 0, 4, 17,5, 18, 33, 49, 65, 6, 19, 81, 97, 7, 34, 113, 20, 50, 129, 145, 161, 8, 35, 66, 177, 193, 21, 82, 209, 240,36, 51, 98, 114, 130, 9, 10, 22, 23, 24, 25, 26, 37, 38, 39, 40, 41, 42, 52, 53, 54, 55, 56, 57, 58, 67, 68, 69,70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118,119, 120, 121, 122, 131, 132, 133, 134, 135, 136, 137, 138, 146, 147, 148, 149, 150, 151, 152, 153, 154, 162,163, 164, 165, 166, 167, 168, 169, 170, 178, 179, 180, 181, 182, 183, 184, 185, 186, 194, 195, 196, 197, 198,199, 200, 201, 202, 210, 211, 212, 213, 214, 215, 216, 217, 218, 225, 226, 227, 228, 229, 230, 231, 232, 233,234, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250};unsigned char hfm2[] { 255, 196, 0, 31, 1, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};unsigned char hfm3[] {255, 196, 0, 181, 17, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2,119, 0, 1, 2, 3, 17, 4, 5, 33, 49, 6, 18, 65, 81, 7, 97, 113, 19, 34, 50, 129, 8, 20, 66, 145, 161, 177,193, 9, 35, 51, 82, 240, 21, 98, 114, 209, 10, 22, 36, 52, 225, 37, 241, 23, 24, 25, 26, 38, 39, 40, 41,42, 53, 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101,102, 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, 130, 131, 132, 133, 134, 135, 136, 137,138, 146, 147, 148, 149, 150, 151, 152, 153, 154, 162, 163, 164, 165, 166, 167, 168, 169, 170, 178, 179,180, 181, 182, 183, 184, 185, 186, 194, 195, 196, 197, 198, 199, 200, 201, 202, 210, 211, 212, 213, 214,215, 216, 217, 218, 226, 227, 228, 229, 230, 231, 232, 233, 234, 242, 243, 244, 245, 246, 247, 248, 249,250};//------ali--------------------------------------int ali(int i, int out[2]) { //out[1]len out[0]intint 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;}}}out[1] len;out[0] o;return 0;}//-------------Y_DC--------------------------------int hfm_ydc(unsigned char i, int out[2]) { //out[1]len out[0]intif (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]intif (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_00xf; //out[1]len out[0]int// unsigned char i_len0xa;unsigned int len;unsigned int o;unsigned char zj i_0 * 16 i_len; //合成一个字节unsigned char ws[16] {};memcpy(ws, hfm1[5], 16);unsigned char zh[162] {};memcpy(zh, hfm1[21], 162);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_00xf; //out[1]len out[0]int// unsigned char i_len0xa;unsigned int len;unsigned int o;unsigned char zj i_0 * 16 i_len; //合成一个字节unsigned char ws[16] {};memcpy(ws, hfm3[5], 16);unsigned char zh[162] {};memcpy(zh, hfm3[21], 162);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( unsigned char i[8][8], int o[8][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] - 128) * 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; //-30.1856int s1 round(s * 100); //-3019s s1 / 100.0; //-30.19o[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0o的下标要加一因为增加了15,0for (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0o[0][1] 0;o[0][0] i[0];t 1;for (int a 1; a 64; a) { // aif ((i[a] 0) (i[a 1] 0) ((a 1) 63)) { //000001z;} // aif ((i[a] 0) (i[a 1] 0) ((a 1) 63)) { //0000结束z; //本次的0o[t][0] 0;o[t][1] z 1; //加a1的0break; //判断完成} // aif ((i[a] 0) (i[a 1] ! 0)) { //000100z; //加上本次的一个0o[t][0] i[a 1];o[t][1] z;z 0; //清0,计算下次的连续0t;a a 1;}if ((i[a] ! 0) (a 0)) { //第一个数非0o[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0o[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) {o[a] p[zb[a]];}return 0;}
// -----量化函数---------------int lh(int (*i)[8], unsigned 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;}//---------编码start-------------------------------------//---------读量化表-------------------------------char lh00[64] {}; //提取量化表char lh10[64] {};memcpy(lh00, lhb0[5], 64); //使用自定义量化表memcpy(lh10, lhb1[5], 64);//-----------读yuv ----------------------------------------------------------------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//---------------------------------------------------------------------------------unsigned char yfl[pic_heigth * pic_width] {};unsigned char ufl[pic_heigth * pic_width / 4 ] {};unsigned char vfl[pic_heigth * pic_width / 4 ] {};for (int a 0; a pic_heigth * pic_width; a) {yfl[a] mp[a];}for (int a 0; a pic_heigth * pic_width / 4; a) {ufl[a] mp[a pic_heigth * pic_width];}for (int a 0; a pic_heigth * pic_width / 4; a) {vfl[a] mp[a pic_heigth * pic_width * 5 / 4];}//----------------------------------------------------------------------------------//-------Y 分割8×8----------------------------int yp 0; //输出数组序号unsigned char y64[pic_width * pic_heigth / 64][64] {}; //输出数组for (int y 0; y pic_heigth; y y 8) { //提取左上角点的垂直数据for (int x 0; x pic_width; 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 0-63for (int a 0; a 8; a) {for (int b 0; b 8; b) {y64[yp][n] yfl[pic_width * (a y) (b x)];n;}}yp;}}//-------U分割8×8----------------------------int up 0; //输出数组序号unsigned char u64[pic_width * pic_heigth / 256][64] {}; //输出数组for (int y 0; y pic_heigth / 2; y y 8) { //提取左上角点的垂直数据for (int x 0; x pic_width / 2; 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 0-63for (int a 0; a 8; a a 1) {for (int b 0; b 8; b b 1) {u64[up][n] ufl[(pic_width / 2) * (a y) (b x)];n;}}up;}}//-------V分割8×8----------------------------int vp 0; //输出数组序号unsigned char v64[pic_width * pic_heigth / 256][64] {}; //输出数组for (int y 0; y pic_heigth / 2 ; y y 8) { //提取左上角点的垂直数据for (int x 0; x pic_width / 2 ; 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 0-15for (int a 0; a 8; a a 1) {for (int b 0; b 8; b b 1) {v64[vp][n] vfl[(pic_width / 2) * (a y) (b x)];n;}}vp;}}//------------------------------------------------------//------Y处理函数---------------------------------int yy(int ysc, unsigned char lh0[8][8], unsigned char y[8][8]) {int y_fdct[8][8] {};fdct(y, y_fdct);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]intint q y_zl[0][0] - ysc; //DC 差值ali(q, ydc); //处理Y_DCint ydc_hfm[2] {}; //ydc_hfm[1]lenhfm_ydc(ydc[1], ydc_hfm);int ls (ydc_hfm[0] ydc[1]) | ydc[0]; //组合成一intfor (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); //取AC 值unsigned int yac_h[2] {};hfm_yac(y_zl[a][1], yac[1], yac_h); //0的个数系数位数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]; //返回本次的Y_DC值}unsigned char (*lh0)[8] (unsigned char (*)[8])lh00;unsigned char (*lh1)[8] (unsigned char (*)[8])lh10; //UV 量化表转成8×8//------UV处理函数---------------------------------int uu(int usc, unsigned char lh1[8][8], unsigned char u[8][8]) {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);//--------UV-DC----------------------------------int udc[2] {}; //ydc[1]len ydc[0]intint q u_zl[0][0] - usc; //DC 差值ali(q, udc); //处理Y_DCint udc_hfm[2] {}; //ydc_hfm[1]lenhfm_uvdc(udc[1], udc_hfm);int ls (udc_hfm[0] udc[1]) | udc[0]; //组合成一intfor (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;}//-------UV-AC-------------------------------for (int a 1; a len_u_zl; a) {int uac[2] {};ali(u_zl[a][0], uac); //取AC 值unsigned int uac_h[2] {};hfm_uvac(u_zl[a][1], uac[1], uac_h); //0的个数系数位数int ls (uac_h[0] uac[1]) | uac[0];for (int a (uac[1] uac_h[1]); a 0; a--) {o_bit[to] (ls (int)pow(2, (a - 1))) (a - 1); //取ls 每一位数to;}}return u_zl[0][0]; //返回本次的Y_DC值}int vv(int vsc, unsigned char lh1[8][8], unsigned char v[8][8]) {int v_fdct[8][8] {};fdct(v, v_fdct);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);//--------UV-DC----------------------------------int vdc[2] {}; //ydc[1]len ydc[0]intint q v_zl[0][0] - vsc; //DC 差值ali(q, vdc); //处理Y_DCint vdc_hfm[2] {}; //ydc_hfm[1]lenhfm_uvdc(vdc[1], vdc_hfm);int ls (vdc_hfm[0] vdc[1]) | vdc[0]; //组合成一intfor (int a (vdc[1] vdc_hfm[1]); a 0; a--) {o_bit[to] (ls (int)pow(2, (a - 1))) (a - 1); //取ls 每一位数to;}//-------UV-AC-------------------------------for (int a 1; a len_v_zl; a) {int vac[2] {};ali(v_zl[a][0], vac); //取AC 值unsigned int vac_h[2] {};hfm_uvac(v_zl[a][1], vac[1], vac_h); //0的个数系数位数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;}}return v_zl[0][0]; //返回本次的Y_DC值}
//----------------------------------------------------------------int udiff 0;int vdiff 0;int ydiff 0;//---------Y 排序---------------------------------- //第一个MCU y01 y02 y10 y11 u01 v01int yw[pic_heigth*pic_width/64]{};int wn0;for(int y0;ypic_heigth/8;yy2){for(int x0;xpic_width/8;xx2){for(int b0;b2;b){for(int a0;a2;a){yw[wn](yb)*pic_width/8xa;wn;}}}}//---------MCU---------------------------------for (int a 0; a pic_width * pic_heigth / 256; a) { //MCU4Y1U1Vfor (int b 0; b 4; b) {unsigned char y1[8][8] {};memcpy(y1, (y64[yw[a * 4 b]][0]), 64);ydiff yy(ydiff, lh0, y1);}unsigned char u1[8][8] {};memcpy(u1, (u64[a][0]), 64);udiff uu(udiff, lh1, u1);unsigned char v1[8][8] {};memcpy(v1, (v64[a][0]), 64);vdiff vv(vdiff, lh1, v1);}//-------生成jpeg文件-----------------------------unsigned char h1 pic_heigth / 256;unsigned char h2 pic_heigth % 256;unsigned char l1 pic_width / 256;unsigned char l2 pic_width % 256;unsigned char zhen[] {255, 192, 0, 17, 8, h1, h2, l1, l2, 3, 1, 0x22, 0, 2, 0x11, 1, 3, 0x11, 1 }; //帧头unsigned char sos[] {255, 218, 0, 12, 3, 1, 0, 2, 17, 3, 17, 0, 63, 0 }; //比特流开始unsigned char jp[900000] {};jp[0] 0xff; //jpeg开始jp[1] 0xd8;int k 2;memcpy(jp[k], lhb0, (2 0x43)); //量化表k k 2 0x43;memcpy(jp[k], lhb1, (2 0x43));k k 2 0x43;memcpy(jp[k], zhen, (2 0x11)); //帧全局k k 2 0x11;memcpy(jp[k], hfm0, (2 0x1f)); //霍夫曼表k k 2 0x1f;memcpy(jp[k], hfm1, (2 0xb5));k k 2 0xb5;memcpy(jp[k], hfm2, (2 0x1f));k k 2 0x1f;memcpy(jp[k], hfm3, (2 0xb5));k k 2 0xb5;memcpy(jp[k], sos, (2 0xc)); //比特流开始k k 2 0xc;for (int a 0; a 8 - (to % 8); a) {o_bit[to a] 1; //比特流凑成8的倍数不够补1}to to 8 - to % 8;for (int a 0; a to; a a 8) { //比特流转成字节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] * 2 o_bit[a 7];if (zz 0xff) {jp[k] zz;jp[k k 1] 0; //0xff 后面跟0} else {jp[k] zz;}k k 1;}jp[k k 1] 0xff; //jpeg 结束jp[k k 1] 0xd9;FILE *fz fopen(file_out, wb);fwrite(jp, k, 1, fz);fclose(fz);puts(编码over);return 0;
}
