c jpeg 编码解码验证数据

2024-01-07 23:54:55

1. yuv420p? 16×16 像素点 384字节全部数据

把上面的384个char从左到右，从上到下的顺序输入文件，就能显示红绿蓝白4个水平条

2. 256字节的亮度分量

81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,

Y 分量要8×8 分割，UV 刚好64字节不用分割

3 . 64字节的U分量

90 ,90 ,90 ,90 ,90 ,90 ,90 ,90 ,
90 ,90 ,90 ,90 ,90 ,90 ,90 ,90 ,
53 ,53 ,53 ,53 ,53 ,53 ,53 ,53 ,
53 ,53 ,53 ,53 ,53 ,53 ,53 ,53 ,
239 ,239 ,239 ,239 ,239 ,239 ,239 ,239 ,
239 ,239 ,239 ,239 ,239 ,239 ,239 ,239 ,
128 ,128 ,128 ,128 ,128 ,128 ,128 ,128 ,
128 ,128 ,128 ,128 ,128 ,128 ,128 ,128 ,
4.? 64字节的V 分量

239 ,239 ,239 ,239 ,239 ,239 ,239 ,239 ,
239 ,239 ,239 ,239 ,239 ,239 ,239 ,239 ,
34 ,34 ,34 ,34 ,34 ,34 ,34 ,34 ,
34 ,34 ,34 ,34 ,34 ,34 ,34 ,34 ,
109 ,109 ,109 ,109 ,109 ,109 ,109 ,109 ,
109 ,109 ,109 ,109 ,109 ,109 ,109 ,109 ,
128 ,128 ,128 ,128 ,128 ,128 ,128 ,128 ,
128 ,128 ,128 ,128 ,128 ,128 ,128 ,128 ,
5. Y分割为4个8×8块

? ? y0：

81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
81 ,81 ,81 ,81 ,81 ,81 ,81 ,81 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,
144 ,144 ,144 ,144 ,144 ,144 ,144 ,144 ,

y1:

40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
40 ,40 ,40 ,40 ,40 ,40 ,40 ,40 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,
235 ,235 ,235 ,235 ,235 ,235 ,235 ,235 ,

Y3:

6, 4个Y8×8块余弦变换

-124 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-228 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
80 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-53 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
45 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
//+++++++++
-124 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-228 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
80 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-53 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
45 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
//+++++++++
76 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-706 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
248 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-165 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
140 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
//+++++++++
76 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-706 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
248 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-165 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
140 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
//+++++++++
?

U: 余弦变换

++++++++
-4 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-294 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-136 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
369 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-247 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
56 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
58 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
++++++++
V：余弦变换

-4 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
204 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
413 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
262 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-175 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-171 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
-40 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
++++++++
==============================================================

JPEG 官方通用量化表

?? ?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};
?? ?
?? ?unsigned char lhb1[0x45]={0xff,0xdb ,0 ,0x43 ,1 ,
?? ??? ?17,18,24,47,99,99,99,99,
?? ??? ?18,21,26,66,99,99,99,99,
?? ??? ?24,26,56,99,99,99,99,99,
?? ??? ?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,
?? ??? ?99,99,99,99,99,99,99,99
?? ?};
? ? =========================================================

JPEG 官方通用霍夫曼表

?? ?
?? ?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
?? ?};
? ?========================================================================= 4个Y Z排序：第一个是DC，后面是AC

(0,-7), (1,-19), (6,5), (10,-2), (0,0),?
(0,-7), (1,-19), (6,5), (10,-2), (0,0),?
(0,4), (1,-58), (6,17), (10,-6), (14,1), (0,0),?
(0,4), (1,-58), (6,17), (10,-6), (14,1), (0,0),?

U：

(0,0), (1,-16), (0,-5), (5,7), (10,-2), (0,0),

(0,0), (1,11), (0,17), (5,5), (10,-1), (0,-1), (0,0),?
==================================================================

?? ?unsigned char zhen[] = {255, 192, 0, 17, 8, 0, 16, 0, 16, 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

=====================================================================

Y,U,V比特流：

131 ,251 ,51 ,254 ,154 ,255 ,0 ,227 ,180 ,127 ,102 ,127 ,211 ,95 ,252 ,118 ,173 ,255 ,0 ,194 ,11 ,255 ,0 ,81 ,31 ,252 ,131 ,255 ,0 ,215 ,163 ,254 ,16 ,95 ,250 ,136 ,255 ,0 ,228 ,31 ,254 ,189 ,31 ,217 ,244 ,191 ,231 ,255 ,0 ,254 ,74 ,31 ,91 ,204 ,127 ,231 ,239 ,224 ,143?
--------------------------------
比特流的存储顺序：先是4个Y，再是U，最后是V。

YUV420P 三分量存储顺序是：首先存全部图片的Y分量，再存全部∪分量，最后存V分量。Y分量数等于图片像数，也就是图片的长X宽。U和V的数量相同，都等于1/4 长X宽。

文章来源:https://blog.csdn.net/m0_59802969/article/details/135395665
本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若内容造成侵权/违法违规/事实不符，请联系我的编程经验分享网邮箱：veading@qq.com进行投诉反馈，一经查实，立即删除！