usbvc_guid
usbvc_guid format;
usbvc_guid kYUY2Guid = {0x59, 0x55, 0x59, 0x32, 0x00, 0x00, 0x10, 0x00, 0x80,
usbvc_guid kNV12Guid = {0x4e, 0x56, 0x31, 0x32, 0x00, 0x00, 0x10, 0x00, 0x80,
print_guid(const usbvc_guid guid)
if (!memcmp(guid, kYUY2Guid, sizeof(usbvc_guid)))
else if (!memcmp(guid, kNV12Guid, sizeof(usbvc_guid)))