1、source_code
main.c中实现了函数draw_Font_Func()，这个函数可以直接移植到C程序中使用。
zimo.h里面放的是字模转码后的数据。
2、data_yuv
测试用的yuv420数据(352*288) CIF格式，测试前后的数据。
3、zimo_gr.zip
取字幕的软件
1 /*
2 * Copyright(C), 2008-2013, Ubuntu Inc.
3 * File name: main.c
4 * Author: xubinbin 徐彬彬 (Beijing China)
5 * Version: 1.0
6 * Date: 2013.06.09
7 * Description:
8 * Function List: char *draw_Font_Func(char *ptr_frame,const unsigned char font[],int startx,int starty,int color)
9 * Email: [email protected]
10 */
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <assert.h>
15 #include <string.h>
16
17 #include "zimo.h"
18
19 #define FRAME_WIDTH (352)
20 #define FRAME_HEIGHT (288)
21 #define FRAME_SIZE (FRAME_WIDTH*FRAME_HEIGHT*3/2)
22 #define IN_FILENAME "in.raw"
23 #define OUT_FILENAME "out.raw"
24
25 const unsigned char table[] = {
26
27 /*-- 文字: 陈 --*/
28 /*-- 楷体_GB231212; 此字体下对应的点阵为：宽x高=16x16 --*/
29 0x00,0x40,0x78,0x40,0x48,0x40,0x57,0xFE,0x50,0x80,0x61,0x20,0x51,0x20,0x4A,0x20,
30 0x4B,0xFC,0x48,0x20,0x69,0x28,0x51,0x24,0x42,0x22,0x44,0x22,0x40,0xA0,0x40,0x40,
31
32 /*-- 文字: 桂 --*/
33 /*-- 楷体_GB231212; 此字体下对应的点阵为：宽x高=16x16 --*/
34 0x10,0x20,0x10,0x20,0x11,0xFC,0x10,0x20,0xFC,0x20,0x10,0x20,0x33,0xFE,0x38,0x00,
35 0x54,0x20,0x54,0x20,0x91,0xFC,0x10,0x20,0x10,0x20,0x10,0x20,0x13,0xFE,0x10,0x00,
36
37 /*-- 文字: 芳 --*/
38 /*-- 楷体_GB231212; 此字体下对应的点阵为：宽x高=16x16 --*/
39 0x08,0x20,0x08,0x20,0xFF,0xFE,0x08,0x20,0x0A,0x20,0x01,0x00,0xFF,0xFE,0x04,0x00,
40 0x04,0x00,0x07,0xF0,0x04,0x10,0x08,0x10,0x08,0x10,0x10,0x10,0x20,0xA0,0x40,0x40,
41
42 };
43
44 /*
45 * Function: draw_Font_Func
46 * Description: 实现在yuv420图片上面画字
47 * Input: char *ptr_frame 一帧视频的首地址
48 * const unsigned char font[] 画的字模
49 * int startx 写字的起点坐标x
50 * int starty 写字的起点坐标y
51 * int color 字颜色的选择，具体颜色在程序代码
52 * Return: 这里会把传进来的一帧视频的地址返回，可以不调用
53 */
54 char *draw_Font_Func(char *ptr_frame,const unsigned char font[],int startx,int starty,int color)
55 {
56
57 assert( ptr_frame != NULL );
58
59 int tagY=0,tagU=0,tagV=0;
60 char *offsetY=NULL,*offsetU=NULL,*offsetV=NULL;
61 unsigned short p16, mask16; // for reading hzk16 dots
62
63 /*yuv 地址的设置 */
64 offsetY = ptr_frame;
65 offsetU = offsetY + FRAME_WIDTH * FRAME_HEIGHT;
66 offsetV = offsetU + FRAME_WIDTH * FRAME_HEIGHT/4;
67
68 switch (color)
69 {
70 case 0: // Yellow
71 tagY = 226;tagU = 0;tagV = 149;
72 break;
73 case 1: // Red
74 tagY = 76;tagU = 85;tagV = 255;
75 break;
76 case 2: // Green
77 tagY = 150;tagU = 44;tagV = 21;
78 break;
79 case 3: // Blue
80 tagY = 29;tagU = 255;tagV = 107;
81 break;
82 default: // White
83 tagY = 128;tagU = 128;tagV = 128;
84 }
85
86 int x=0,y=0,i=1,j=0,k=0;
87 for(i = 0; i < 3; i++)
88 {
89 #if 0
90 for (j = 0, y = starty; j < 16 && y < FRAME_HEIGHT - 1; j++, y+=2) // line dots per char
91 {
92 p16 = *(unsigned short *)(font + j*2 + i*32);/*取字模数据*/
93 mask16 = 0x0080; /* 二进制 1000 0000 */
94 for (k = 0, x = startx +i*36; k < 16 && x < FRAME_WIDTH - 1; k++, x+=2) // dots in a line
95 {
96 if (p16 & mask16)
97 {
98 *(offsetY + y*FRAME_WIDTH + x) = *(offsetY + y*FRAME_WIDTH + x+1) = tagY;
99 *(offsetY + (y+1)*FRAME_WIDTH + x) = *(offsetY + (y+1)*FRAME_WIDTH + x+1) = tagY;
100 *(offsetU + y * FRAME_WIDTH/4 + x/2) =tagU;
101 *(offsetV + y * FRAME_WIDTH/4 + x/2) = tagV;
102 }
103 mask16 = mask16 >> 1; /* 循环移位取数据 */
104 if (mask16 == 0)
105 mask16 = 0x8000;
106 }
107 }
108 #else
109 for (j = 0, y = starty; j < 16 && y < FRAME_HEIGHT - 1; j++, y++) // line dots per char
110 {
111 p16 = *(unsigned short *)(font + j*2 + i*32);/*取字模数据*/
112 mask16 = 0x0080; /* 二进制 1000 0000 */
113 for (k = 0, x = startx +i*18; k < 16 && x < FRAME_WIDTH - 1; k++, x++) // dots in a line
114 {
115 if (p16 & mask16)
116 {
117 *(offsetY + y*FRAME_WIDTH + x) = 255;
118 // *(offsetU + y * FRAME_WIDTH/4 + x/2) = 85;
119 // *(offsetV + y * FRAME_WIDTH/4 + x/2) = 255;
120 }
121 mask16 = mask16 >> 1; /* 循环移位取数据 */
122 if (mask16 == 0)
123 mask16 = 0x8000;
124 }
125 }
126 #endif
127 }
128
129 return (char *)ptr_frame;
130 }
131
132 int main(int argc,char * argv[])
133 {
134 int ret = 0;
135 FILE *in_file,*out_file;
136
137 char *frame_buffer = NULL;
138 frame_buffer = (char*)malloc(FRAME_SIZE);
139
140 //read frame file 读原来的一帧数据
141 in_file = fopen(IN_FILENAME,"r");
142 if (in_file == NULL)
143 {
144 printf("open in file error!\n");
145 }
146
147 ret = fread(frame_buffer,FRAME_SIZE,1,in_file);
148 if (ret != 1)
149 {
150 printf("ret = %d\n");
151 printf("fread file error!\n");
152 }
153 fclose(in_file);
154
155 //数据转换
156 draw_Font_Func(frame_buffer,table,20,10,1);
157
158 //write frame file 把数据写回
159 out_file = fopen(OUT_FILENAME,"w");
160 if (out_file == NULL)
161 {
162 printf("open in file error!\n");
163 }
164
165 ret = fwrite(frame_buffer,FRAME_SIZE,1,out_file);
166 if (ret != 1)
167 {
168 printf("ret = %d\n");
169 printf("fwrite file error!\n");
170 }
171 fclose(out_file);
172 free(frame_buffer);
173
174 printf("Done!\n");
175 return 0;
176 }
时间： 2024-08-07 04:31:19