Re: [Displaylink-devel] News from Displaylink

[Roberto De I. <ro...@un...>]

On Fri, 2009-05-15 at 09:25 +0200, Chris Hodges wrote:
> Roberto De Ioris schrieb:
> > The library is online:
> >
> > http://www.freedesktop.org/wiki/Software/libdlo
> >   
> 
> Nice. Looks like this is something one could work on. But yes, it
> does not cover the compression but at least provides a good basis
> for the initialization stuff for different screen modes.
> 
> But this is a joke, right?
> 
> 
> /** Constant used for deciding if a host is big- or little endian.
>  */
> const uint32_t endian = 1;
> 
> /** Return non-zero if the host is big endian or zero if the host is 
> little endian.
>  */
> #define IS_BIGENDIAN() ((*(char*)&endian) == '\0')
> 
> /** Convert a 32 bit little endian value into a host byte-order value.
>  *
>  *  @param  val  Little-endian 32 bit value to convert.
>  *
>  *  @return  Value in host byte order.
>  */
> #define LETOHL(val) (IS_BIGENDIAN() ? swap_endian_l(val) : val)
> 
> Runtime access to this "endian" constant on every LETOHL macro?
> 
> Sigh.
> 
> Have a nice day -- gotta get the usbvideo.class working before I have
> time to spend on the DisplayLink stuff...
> 
> Chrisly



Sadly the library is 99% useless, without compression no one can write a
usable driver.

I will continue to reverse engineer the windows driver.

-- 
Roberto De Ioris
http://unbit.it
JID: ro...@ja...