Arm-Linux LCD_show_jpg picture ," Segmentation fault " problem? - c

Question

I wanna show 3 .jpg pictures on LCD ,but the program crashed, it seems that the pointer did not init,here is the main() function:
#include <stdio.h>
#include <pthread.h>
int main(int argc,char **argv)
{
lcd_open("/dev/fb0");
int i = 0;
char* pic_path[3] = {"./jpeg/1.jpg","./jpeg/2.jpg","./jpeg/3.jpg"};
while(1)
{
if(i == 3)
{
i = 0;
}
lcd_draw_jpg(0, 0, pic_path[i], NULL, 0, 0);
pthread_testcancel();
sleep(1);
i++;
}
return 0;
}
It just show the 1st picture.
here is the display function Lcd.c
int lcd_draw_jpg(unsigned int x,unsigned int y,const char *pjpg_path,char *pjpg_buf,unsigned int jpg_buf_size,unsigned int jpg_half)
{
/*定义解码对象，错误处理对象*/
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
char *pcolor_buf = g_color_buf
char *pjpg
unsigned int i=0;
unsigned int color =0;
unsigned int count =0;
unsigned int x_s = x;
unsigned int x_e ;
unsigned int y_e ;
int jpg_fd;
unsigned int jpg_size;
unsigned int jpg_width;
unsigned int jpg_height;
//lcd_open("/dev/fb0");
if(pjpg_path!=NULL)
{
/* 申请jpg资源，权限可读可写 */
jpg_fd=open(pjpg_path,O_RDWR);
if(jpg_fd == -1)
{
printf("open %s error\n",pjpg_path);
return -1;
}
/* 获取jpg文件的大小 */
jpg_size=file_size_get(pjpg_path);
/* 为jpg文件申请内存空间 */
pjpg = malloc(jpg_size);
/* 读取jpg文件所有内容到内存 */
read(jpg_fd,pjpg,jpg_size);
}
else
{
jpg_size = jpg_buf_size;
pjpg = pjpg_buf;
}
/*注册出错处理*/
cinfo.err = jpeg_std_error(&jerr);
/*创建解码*/
jpeg_create_decompress(&cinfo);
/*直接解码内存数据*/
jpeg_mem_src(&cinfo,pjpg,jpg_size);
/*读文件头*/
jpeg_read_header(&cinfo, TRUE);
/*开始解码*/
jpeg_start_decompress(&cinfo);
if(jpg_half)
{
x_e = x_s+(cinfo.output_width/2);
y_e = y +(cinfo.output_height/2);
/*读解码数据*/
while(cinfo.output_scanline < cinfo.output_height)
{
pcolor_buf = g_color_buf;
/* 读取jpg一行的rgb值 */
jpeg_read_scanlines(&cinfo,(JSAMPARRAY)&pcolor_buf,1);
/* 再读取jpg一行的rgb值 */
jpeg_read_scanlines(&cinfo,(JSAMPARRAY)&pcolor_buf,1);
for(i=0; i<(cinfo.output_width/2); i++)
{
/* 获取rgb值 */
color = *(pcolor_buf+2);
color = color | *(pcolor_buf+1)<<8;
color = color | *(pcolor_buf)<<16;
/* 显示像素点 */
lcd_draw_point(x,y,color);
pcolor_buf +=6;
x++;
}
/* 换行 */
y++;
x = x_s;
}
}
else
{
x_e = x_s+cinfo.output_width;
y_e = y +cinfo.output_height;
/*读解码数据*/
while(cinfo.output_scanline < cinfo.output_height )
{
pcolor_buf = g_color_buf;
/* read one line's of jpg */
jpeg_read_scanlines(&cinfo,(JSAMPARRAY)&pcolor_buf,1);
for(i=0; i<cinfo.output_width; i++)
{
/* get rgb value */
color = *(pcolor_buf+2);
color = color | *(pcolor_buf+1)<<8;
color = color | *(pcolor_buf)<<16;
/* display pixel point */
lcd_draw_point(x,y,color);
pcolor_buf +=3;
x++;
}
/* 换行 */
y++;
x = x_s;
}
}
/*解码完成*/
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
if(pjpg_path!=NULL)
{
/* 关闭jpg文件 */
close(jpg_fd);
/* 释放jpg文件内存空间 */
free(pjpg);
}
close_lcd();
return 0;
}
this looks like Memory Leak or something else......
these seems a little weird,and