struct fb_var_screeninfo主要用于获取和设置FrameBuffer的可变屏幕信息,包括分辨率、像素位深、像素格式等。这些信息可以通过ioctl函数使用FBIOGET_VSCREENINFO获取,也可以通过FBIOPUT_VSCREENINFO修改。 3.1struct fb_var_screeninfo定义: struct fb_var_screeninfo {__u32 xres; /* visible resolution */__u32 yres;...
struct fb_var_screeninfo vinfo; struct fb_fix_screeninfo finfo; long int screensize = 0; struct fb_bitfield red; struct fb_bitfield green; struct fb_bitfield blue; //打开显示设备 fbfd = open("/dev/fb0", O_RDWR); if (!fbfd) { printf("Error: cannot open framebuffer device.\n");...
资源简介://结构 struct fb_fix_screeninfo finfo struct fb_var_screeninfo vinfo //打开设备 fd = open["/dev/fb0", O_RDWR] if [!fd] { printf["Cannot open framebuffer device.\n"] exit[1] } //取得固定信息 if [ioctl... 标签: struct fb_fix_screeninfo fb_var_screeninfo finfo 上传时...
int fp=0; struct fb_var_screeninfo vinfo; struct fb_fix_screeninfo finfo; fp = open("/dev/fb0",O_RDWR); if (fp < 0) { printf("Error : Can not open framebuffer device\n"); exit(EXIT_FAILURE); } if (ioctl(fp,FBIOGET_FSCREENINFO,&finfo)) { printf("Error reading fixed informat...
size dspaudio fd printf无效的音频DSPID writedsp audio fd buf size printf 音频DSP无法写入 return0音频渲染代码结束 视频渲染代码 include linux fb includesys mman defineFBDEVICE dev fb0 enumpic format eYUV 420 Planer structvideo fb intvideo fd structfb var screeninfovinfo structfb fix screeninfo...