mga_common.c

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        mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_CouldNotGetLumaValuesFromTheKernelModule);
	return VO_FALSE;
     }
     
     if ( !strcmp( data,"contrast" ) )
	 val=(luma & 0xFFFF);
     else
	 val=(luma >> 16);
	 
     va_start(ap, data);
     value = va_arg(ap, int*);
     va_end(ap);

     *value = (val*200)/255;

     return VO_TRUE;
    }
														       
#ifndef VO_XMGA
  case VOCTRL_FULLSCREEN:
    if (vo_screenwidth && vo_screenheight)
	mga_fullscreen();
    else
	mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_ScreenWidthHeightUnknown);
    return VO_TRUE;
  case VOCTRL_GET_PANSCAN:
      if ( !vo_fs ) return VO_FALSE;
      return VO_TRUE;
#endif

#if defined( VO_XMGA ) && defined( HAVE_NEW_GUI )
  case VOCTRL_GUISUPPORT:
    return VO_TRUE;
#endif

#ifdef VO_XMGA
  case VOCTRL_ONTOP:
      vo_x11_ontop();
      return VO_TRUE;
  case VOCTRL_GET_PANSCAN:
      if ( !inited || !vo_fs ) return VO_FALSE;
      return VO_TRUE;
  case VOCTRL_FULLSCREEN:
      vo_x11_fullscreen();
      vo_panscan_amount=0;
    /* indended, fallthrough to update panscan on fullscreen/windowed switch */
#endif
  case VOCTRL_SET_PANSCAN:
      if ( vo_fs && ( vo_panscan != vo_panscan_amount ) ) // || ( !vo_fs && vo_panscan_amount ) )
       {
//        int old_y = vo_panscan_y;
	panscan_calc();
//        if ( old_y != vo_panscan_y ) 
	set_window();
       }
      return VO_TRUE;
  }
  return VO_NOTIMPL;
}


static int mga_init(int width,int height,unsigned int format){

        switch(format){
        case IMGFMT_YV12:
	    width+=width&1;height+=height&1;
	    mga_vid_config.frame_size = ((width + 31) & ~31) * height + (((width + 31) & ~31) * height) / 2;
            mga_vid_config.format=MGA_VID_FORMAT_I420; break;
        case IMGFMT_I420:
        case IMGFMT_IYUV:
	    width+=width&1;height+=height&1;
	    mga_vid_config.frame_size = ((width + 31) & ~31) * height + (((width + 31) & ~31) * height) / 2;
            mga_vid_config.format=MGA_VID_FORMAT_YV12; break;
        case IMGFMT_YUY2:
	    mga_vid_config.frame_size = ((width + 31) & ~31) * height * 2;
            mga_vid_config.format=MGA_VID_FORMAT_YUY2; break;
        case IMGFMT_UYVY:
	    mga_vid_config.frame_size = ((width + 31) & ~31) * height * 2;
            mga_vid_config.format=MGA_VID_FORMAT_UYVY; break;
        default: 
            mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_InvalidOutputFormat,format);
            return (-1);
        }

	mga_vid_config.src_width = width;
	mga_vid_config.src_height= height;
	if(!mga_vid_config.dest_width)
	    mga_vid_config.dest_width = width;
	if(!mga_vid_config.dest_height)
	    mga_vid_config.dest_height= height;

	mga_vid_config.colkey_on=0;
	
	mga_vid_config.num_frames=(vo_directrendering && !vo_doublebuffering)?1:3;
	mga_vid_config.version=MGA_VID_VERSION;

	if(width > 1024 && height > 1024)
	{
		mp_msg(MSGT_VO,MSGL_ERR, MGSTR_LIBVO_MGA_ResolutionTooHigh);
		return (-1);
	} else if(height <= 1024)
	{
		// try whether we have a G550
		int ret;
		if ((ret = ioctl(f,MGA_VID_CONFIG,&mga_vid_config)))
		{
			if(mga_vid_config.card_type != MGA_G550)
			{
				// we don't have a G550, so our resolution is too high
				mp_msg(MSGT_VO,MSGL_ERR, MGSTR_LIBVO_MGA_ResolutionTooHigh);
				return (-1);
			} else {
				// there is a deeper problem
				// we have a G550, but still couldn't configure mga_vid
				perror("Error in mga_vid_config ioctl()");
				mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_IncompatibleDriverVersion);
				return -1;
			}
			// if we arrived here, then we could successfully configure mga_vid
			// at this high resolution
		}
	} else {
		// configure mga_vid in case resolution is < 1024x1024 too
		if (ioctl(f,MGA_VID_CONFIG,&mga_vid_config))
		{
			perror("Error in mga_vid_config ioctl()");
			mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_IncompatibleDriverVersion);
			return -1;
		}
	}
	
	mp_msg(MSGT_VO,MSGL_V,"[MGA] Using %d buffers.\n",mga_vid_config.num_frames);

	frames[0] = (char*)mmap(0,mga_vid_config.frame_size*mga_vid_config.num_frames,PROT_WRITE,MAP_SHARED,f,0);
	frames[1] = frames[0] + 1*mga_vid_config.frame_size;
	frames[2] = frames[0] + 2*mga_vid_config.frame_size;
	frames[3] = frames[0] + 3*mga_vid_config.frame_size;
	mga_next_frame = 0;
	vid_data = frames[mga_next_frame];

	//clear the buffer
	memset(frames[0],0x80,mga_vid_config.frame_size*mga_vid_config.num_frames);

#ifndef VO_XMGA
	ioctl(f,MGA_VID_ON,0);
#endif

  return 0;
}

static int mga_uninit(){
  if(f>=0){
	ioctl( f,MGA_VID_OFF,0 );
	munmap(frames[0],mga_vid_config.frame_size*mga_vid_config.num_frames);
	close(f);
	f = -1;
  }
  return 0;
}

static int preinit(const char *vo_subdevice)
{
  const char *devname=vo_subdevice?vo_subdevice:"/dev/mga_vid";
	sws_rgb2rgb_init(get_sws_cpuflags());

	f = open(devname,O_RDWR);
	if(f == -1)
	{
		perror("open");
		mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_MGA_CouldntOpen,devname);
		return(-1);
	}

#ifdef VO_XMGA
  if (!vo_init()) {
    close(f);
    return -1;
  }
#endif

  return 0;
}

static void set_window( void ){

#ifdef VO_XMGA
	 if ( WinID )
	  {
           XGetGeometry( mDisplay,vo_window,&mRoot,&drwX,&drwY,&drwWidth,&drwHeight,&drwBorderWidth,&drwDepth );
           mp_msg(MSGT_VO,MSGL_V,"[xmga] x: %d y: %d w: %d h: %d\n",drwX,drwY,drwWidth,drwHeight );
           drwX=0; drwY=0;
           XTranslateCoordinates( mDisplay,vo_window,mRoot,0,0,&drwcX,&drwcY,&mRoot );
           mp_msg(MSGT_VO,MSGL_V,"[xmga] dcx: %d dcy: %d dx: %d dy: %d dw: %d dh: %d\n",drwcX,drwcY,drwX,drwY,drwWidth,drwHeight );

	  }
	  else
#endif
	  { drwX=drwcX=vo_dx; drwY=drwcY=vo_dy; drwWidth=vo_dwidth; drwHeight=vo_dheight; }

         aspect(&dwidth,&dheight,A_NOZOOM);
         if ( vo_fs )
          {
           aspect(&dwidth,&dheight,A_ZOOM);
           drwX=( vo_screenwidth - (dwidth > vo_screenwidth?vo_screenwidth:dwidth) ) / 2;
           drwcX+=drwX;
           drwY=( vo_screenheight - (dheight > vo_screenheight?vo_screenheight:dheight) ) / 2;
           drwcY+=drwY;
           drwWidth=(dwidth > vo_screenwidth?vo_screenwidth:dwidth);
           drwHeight=(dheight > vo_screenheight?vo_screenheight:dheight);
           mp_msg(MSGT_VO,MSGL_V,"[xmga-fs] dcx: %d dcy: %d dx: %d dy: %d dw: %d dh: %d\n",drwcX,drwcY,drwX,drwY,drwWidth,drwHeight );
          }
	 vo_dwidth=drwWidth; vo_dheight=drwHeight;

#ifdef VO_XMGA
#ifdef HAVE_XINERAMA
		 if(XineramaIsActive(mDisplay))
		 {
		 	XineramaScreenInfo *screens;
		 	int num_screens;
		 	int i;

		 	screens = XineramaQueryScreens(mDisplay,&num_screens);

		 	/* find the screen we are on */
		 	i = 0;
		 	while(i<num_screens &&
		 	    ((screens[i].x_org < drwcX) ||
		 	     (screens[i].y_org < drwcY) ||
		 	     (screens[i].x_org + screens[i].width >= drwcX) ||
		 	     (screens[i].y_org + screens[i].height >= drwcY)))
		 	{
		 		i++;
		 	}

			if(i<num_screens)
			{
				/* save the screen we are on */
				xinerama_screen = i;
			} else {
				/* oops.. couldnt find the screen we are on
				 * because the upper left corner left the
				 * visual range. assume we are still on the
				 * same screen
				 */
				i = xinerama_screen;
		 	}

			if(xinerama_screen == -1)
			{
				// The default value of the xinerama_screen is
				// still there. Which means we could never
				// figure out on which screen we are.
				// Choose the first screen as default
				xinerama_screen = i = 0;
			}

		 	/* set drwcX and drwcY to the right values */
		 	drwcX = drwcX - screens[i].x_org;
		 	drwcY = drwcY - screens[i].y_org;
		 	XFree(screens);
		 }

#endif

         mDrawColorKey();
#endif

         mga_vid_config.x_org=drwcX;
         mga_vid_config.y_org=drwcY;
         mga_vid_config.dest_width=drwWidth;
         mga_vid_config.dest_height=drwHeight;
	 if ( vo_panscan > 0.0f && vo_fs )
	  {
	   drwX-=vo_panscan_x>>1;
	   drwY-=vo_panscan_y>>1;
	   drwWidth+=vo_panscan_x;
	   drwHeight+=vo_panscan_y;

	   mga_vid_config.x_org-=vo_panscan_x>>1;
	   mga_vid_config.y_org-=vo_panscan_y>>1;
           mga_vid_config.dest_width=drwWidth;
           mga_vid_config.dest_height=drwHeight;
#ifdef VO_XMGA
	   mDrawColorKey();
#endif
	  }
	 if ( ioctl( f,MGA_VID_CONFIG,&mga_vid_config ) ) mp_msg(MSGT_VO,MSGL_WARN,"Error in mga_vid_config ioctl (wrong mga_vid.o version?)" );
}