Hi, I have a question about the parameter of VIDIOC_G_INPUT and VIDIOC_S_INPUT parameters in v4l2 specification.
The "Video for Linux Two API Specification" text says that the parameter of VIDIOC_G_INPUT and VIDIOC_S_INPUT is ... > [...] a pointer to an integer where the driver stores the number > of the input, as in the struct v4l2_input index field. > > http://v4l2spec.bytesex.org/spec/r11217.htm In the v4l2_input structure the index has the type of __u32. In contrast, in <linux/videodev2.h> (as of 2.6.27) the ioctls are defined as follows: > #define VIDIOC_G_INPUT _IOR('V', 38, int) > #define VIDIOC_S_INPUT _IOWR('V', 39, int) The problem is that '__u32' is unsigned and 'int' is signed. Furthermore one cannot be sure that sizeof(__u32) == sizeof(int) on all platforms. I guess that the parameter of VIDIOC_G_INPUT and VIDIOC_S_INPUT should be a pointer to __u32. What do you think? Regards, Márton Németh _______________________________________________ Em28xx mailing list [email protected] http://mcentral.de/mailman/listinfo/em28xx
