f1c100s jpeg 解码
时间: 2023-11-23 15:56:00 浏览: 83
F1C100s芯片支持JPEG解码,可以通过使用libjpeg-turbo库来实现。下面是使用libjpeg-turbo库进行JPEG解码的步骤:
1.安装libjpeg-turbo库
```shell
sudo apt-get install libjpeg-turbo8-dev
```
2.在代码中包含头文件
```c
#include <turbojpeg.h>
```
3.定义变量并初始化
```c
tjhandle handle = tjInitDecompress();unsigned char *jpegBuf = NULL;
unsigned long jpegSize = 0;
int width, height, jpegSubsamp;
```
4.读取JPEG文件并获取图像信息
```c
FILE *jpegFile = fopen("test.jpg", "rb");
fseek(jpegFile, 0, SEEK_END);
jpegSize = ftell(jpegFile);
rewind(jpegFile);
jpegBuf = (unsigned char*)malloc(jpegSize);
fread(jpegBuf, 1, jpegSize, jpegFile);
fclose(jpegFile);
tjDecompressHeader2(handle, jpegBuf, jpegSize, &width, &height, &jpegSubsamp);
```
5.解码JPEG文件
```c
unsigned char *dstBuf = (unsigned char*)malloc(width * height * tjPixelSize[TJPF_RGB]);
tjDecompress2(handle, jpegBuf, jpegSize, dstBuf, width, 0, height, TJPF_RGB, TJFLAG_FASTDCT);
```
6.释放内存并销毁句柄
```c
free(jpegBuf);
free(dstBuf);
tjDestroy(handle);
```
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