Re: [Libxine-java-devel] Capabilities and future

[Matthias R. <mri...@in...>]

Hi Kristian

On Sep 22, 2008, at 8:43 PM, Kristian Lindemann Larsen wrote:

> Hey.
> I'm thinking about trying to write a simple linux-based mediacenter in
> java.
That's the exact reason why I started libxine-java...

> I've made some early tests with libxine-java, and made video play.
Fine.

> What I was wondering is, if there is (or is planned) to be able to  
> do OSD?
libxine-java basically wraps the complete xine-lib. xine-lib contains  
support for OSD. See the section of their hacker guide at http://xinehq.de/index.php/hackersguide#OSD
I just tried the example and it works both in a simple C application  
and in Java (I never tried the OSD before). The only catch is that the  
documented API is not available to user applications, but function  
with similar exists as xine_osd_...  For a quick test, just add this  
code before calling controller.playOnce():

        // xine.h constants not provided by libxine-java (yet)
         final int TEXTPALETTE_WHITE_BLACK_TRANSPARENT = 0;
         final int TEXTPALETTE_WHITE_NONE_TRANSLUCID   = 3;
         final int OSD_TEXT1 = 0 * 11;
         final int OSD_TEXT2 = 1 * 11;

         // used in this example
         final int width = 320;
         final int height = 240;

         // get xine stream
     	SWIGTYPE_p_xine_stream_s stream = controller.getNativeStream();
     	SWIGTYPE_p_xine_osd_s osd = XineLib.xine_osd_new(stream, 0, 0,  
width, height);

         /* set sans serif 24 font */
         XineLib.xine_osd_set_font( osd, "sans", 24);

         /* copy pre-defined colors for white, black border,  
transparent background to
            starting at the index used by the first text palette */
         XineLib.xine_osd_set_text_palette(osd,  
TEXTPALETTE_WHITE_BLACK_TRANSPARENT, OSD_TEXT1);

         /* copy pre-defined colors for white, no border, translucid  
background to
            starting at the index used by the second text palette */
         XineLib.xine_osd_set_text_palette(osd,  
TEXTPALETTE_WHITE_NONE_TRANSLUCID, OSD_TEXT2);

         XineLib.xine_osd_draw_text(osd, 0, 100, "white text, black  
border", OSD_TEXT1);
         XineLib.xine_osd_draw_text(osd, 0, 130, "white text, no  
border", OSD_TEXT2);

         XineLib.xine_osd_draw_line(osd, 0, 0,  width-1, height-1, 10);
         XineLib.xine_osd_draw_line(osd, width-1, 0, 0 , height-1, 10);
         		
         XineLib.xine_osd_show(osd, 0); /* 0 stands for 'now' */

As this works fine, I will add a org.libxine.OSD class that provide an  
object-oriented API and makes the calls simpler, e.g.,  
XineLib.xine_osd_show(osd,..) -> osd.show(..)

good luck with your project,
Matthias