Em 28-05-2011 10:01, RÃmi Denis-Courmont escreveu: > Le samedi 28 mai 2011 15:44:52 Mauro Carvalho Chehab, vous avez Ãcrit : >>> int libv4l2_get_associated_devive(int fd, enum >>> libv4l2_associated_device_types type, ...); Where fd is the fd of an >>> open /dev/video node, and ... is a param through which the device gets >>> returned (I guess a char * to a buffer of MAX_PATH length where the >>> device name gets stored, this could >>> be an also identifier like hw:0.0 or in case of vbi a /dev/vbi# path, >>> etc. >> >> Using the fd will be more complex, as we'll loose the device node (is there >> a glibc way to get the device path from the fd?). Well, we may associate >> the fd descriptor with the device node internally at libv4l. > > Not really. fstat() can tell you fd is a character device, and provide the > major and minor though. Yeah, major/minor should be enough to associate it with the device info. The library will need to read the uevent information also, to get the device major/minor, but this should work properly. I'll write a method for the library to allow using the file descriptor instead of the file name. Cheers, Mauro. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
