path: root/libvo/vo_dga.c

#define DISP

/*
 * video_out_dga.c, X11 interface
 *
 *
 * Copyright ( C ) 2001, Andreas Ackermann. All Rights Reserved.
 *
 * <acki@acki-netz.de>
 *
 * Sourceforge username: acki2
 * 
 * note well: 
 *   
 * o this is alpha
 * o covers only common video card formats
 * o works only on intel architectures
 *
 */



#include <stdio.h>
#include <stdlib.h>
#include <string.h>


//#include "linux/keycodes.h"
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "yuv2rgb.h"

LIBVO_EXTERN( dga )

#include <X11/Xlib.h>
#include <X11/extensions/xf86dga.h>

#include "x11_common.h"

static vo_info_t vo_info =
{
        "DGA ( Direct Graphic Access )",
        "dga",
        "Andreas Ackermann <acki@acki-netz.de>",
        ""
};

static int       vo_dga_width;           // bytes per line in framebuffer
static int       vo_dga_vp_width;        // visible pixels per line in framebuffer
static int       vo_dga_vp_height;       // visible lines in framebuffer
static int       vo_dga_is_running = 0; 
static int       vo_dga_src_width;       // width of video in pixels
static int       vo_dga_src_height;      // height of video in pixels
static int       vo_dga_bpp;             // bytes per pixel in framebuffer
static int       vo_dga_src_offset=0;    // offset in src
static int       vo_dga_vp_offset=0;     // offset in dest
static int       vo_dga_bytes_per_line;  // longwords per line to copy
static int       vo_dga_src_skip;        // bytes to skip after copying one line 
                                         // (not supported yet) in src
static int       vo_dga_vp_skip;         // dto. for dest 
static int       vo_dga_lines;           // num of lines to copy
static int       vo_dga_src_format;                                 

static unsigned char     *vo_dga_base;
static Display  *vo_dga_dpy;

//---------------------------------------------------------

// I had tried to work with mmx/3dnow copy code but
// there was not much speed gain and I didn't know
// how to save the FPU/mmx registers - so the copy
// code interferred with sound output ...
// removed the leftovers
// acki2 on 30/3/2001


#define rep_movsl(dest, src, numwords, d_add, count) \
__asm__ __volatile__( \
" \
xfer:                     \n\t\
                  movl %%edx, %%ecx \n\t \
                  cld\n\t \
                  rep\n\t \
                  movsl \n\t\
                  add %%eax, %%edi \n\t\
                  dec %%ebx \n\t\
                  jnz xfer \n\t\
" \
                  : \
                  : "a" (d_add), "b" (count), "S" (src), "D" (dest), \
		    "d" (numwords) \
                  : "memory" )


//---------------------------------------------------------

static uint32_t draw_frame( uint8_t *src[] ){

  int vp_skip = vo_dga_vp_skip;
  int lpl = vo_dga_bytes_per_line >> 2; 
  int numlines = vo_dga_lines;     

  char *s, *d;

  if( vo_dga_src_format==IMGFMT_YV12 ){
    // We'll never reach this point, because YV12 codecs always
    // calls draw_slice
    printf("vo_dga: draw_frame() doesn't support IMGFMT_YV12 (yet?)\n");
  }else{
    s = *src;
    d = (&((char *)vo_dga_base)[vo_dga_vp_offset]);
    rep_movsl(d, s, lpl, vo_dga_vp_skip, numlines );
  }

  return 0;
}

//---------------------------------------------------------

static void check_events(void)
{
  int e=vo_x11_check_events(vo_dga_dpy);
}

//---------------------------------------------------------

static void flip_page( void ){
  check_events();
}

//---------------------------------------------------------

static uint32_t draw_slice( uint8_t *src[],int stride[],
                            int w,int h,int x,int y )
{
  yuv2rgb( vo_dga_base + vo_dga_vp_offset + 
          (vo_dga_width * y +x) * vo_dga_bpp,
           src[0], src[1], src[2],
           w,h, vo_dga_width * vo_dga_bpp,
           stride[0],stride[1] );
  return 0;
};

//---------------------------------------------------------


static void Terminate_Display_Process( void ){
  printf("vo_dga: Terminating display process\n");
}

//---------------------------------------------------------

static const vo_info_t* get_info( void )
{ return &vo_info; }

//---------------------------------------------------------

static uint32_t query_format( uint32_t format )
{
 printf("vo_dga: query_format\n");

 if( !vo_init() ) return 0; // Can't open X11
 printf("Format: %lx\n", format);

 if( format==IMGFMT_YV12 ) return 1;
 if( ( format&IMGFMT_BGR_MASK )==IMGFMT_BGR && 
     ( format&0xFF )==vo_depthonscreen ) return 1;
 return 0;
}

//---------------------------------------------------------

static void
uninit(void)
{

  vo_dga_is_running = 0;
  printf("vo_dga: in uninit\n");
  XUngrabPointer (vo_dga_dpy, CurrentTime);
  XUngrabKeyboard (vo_dga_dpy, CurrentTime);
  XF86DGADirectVideo (vo_dga_dpy, XDefaultScreen(vo_dga_dpy), 0);
  XCloseDisplay(vo_dga_dpy);
}

//---------------------------------------------------------

static uint32_t init( uint32_t width,  uint32_t height,
                      uint32_t d_width,uint32_t d_height,
                      uint32_t fullscreen,char *title,uint32_t format )
{

  int bank, ram;
  int x_off, y_off;

#ifdef HAVE_DGA2
// needed to change DGA video mode
  int modecount,mX, mY, mVBI, i,j;
  int X,Y;
  XDGAMode   *modelines=NULL;
  XDGADevice *dgadevice;
#endif

  if( vo_dga_is_running )return -1;

  if( !vo_init() ){
    printf("vo_dga: vo_init() failed!\n");
    return 0; 
  }

  if((vo_dga_dpy = XOpenDisplay(0))==NULL)
  {
    printf ("vo_dga: Can't open display\n");
    return 1;
  } 

#ifdef HAVE_DGA2
// Code to change the video mode added by Michael Graffam
// mgraffam@idsi.net
  if (modelines==NULL)
    modelines=XDGAQueryModes(vo_dga_dpy, XDefaultScreen(vo_dga_dpy),&modecount);
  
  mX=modelines[0].imageWidth;
  mY=modelines[0].imageHeight;
  mVBI = modelines[0].verticalRefresh;
  X=d_width; Y=d_height; 
  
  printf("vo_dga: Using DGA 2.0 mode changing support\n");	
  j=0; 
  // offbyone-error !!! i<=modecount is WRONG !!!
  for (i=1; i<modecount; i++)
  {
     if( modelines[i].bitsPerPixel == vo_depthonscreen &&
	 modelines[i].maxViewportX)
     {
       printf("vo_dga: (%3d) Trying %4d x %4d @ %3d Hz @ %2d bpp ..",
		     i,
		     modelines[i].viewportWidth, 
		     modelines[i].viewportHeight,
		     (unsigned int) modelines[i].verticalRefresh,
		     modelines[i].bitsPerPixel );
     
       if (
          (modelines[i].viewportWidth >= X) && 
          (modelines[i].viewportHeight >= Y) &&
	  ( 
	   // prefer a better resolution either in X or in Y
	   // as long as the other dimension is at least the same
	   // 
	   // hmm ... MAYBE it would be more clever to focus on the 
	   // x-resolution; I had 712x400 and 640x480 and the movie 
	   // was 640x360; 640x480 would be the 'right thing' here
	   // but since 712x400 was queried first I got this one. 
	   // I think there should be a cmd-line switch to let the
	   // user choose the mode he likes ...   (acki2)
	   
	   (
            ((modelines[i].viewportWidth < mX) &&
	    !(modelines[i].viewportHeight > mY)) ||
	    ((modelines[i].viewportHeight < mY) &&
	    !(modelines[i].viewportWidth > mX)) 
	   ) 
	   // but if we get an identical resolution choose
	   // the one with the lower refreshrate (saves bandwidth !!!)
	   // as long as it's above 50 Hz (acki2 on 30/3/2001)
	   ||
	   (
	    (modelines[i].viewportWidth == mX) &&
	    (modelines[i].viewportHeight == mY) &&
	      (
	       (
		modelines[i].verticalRefresh >= mVBI && mVBI < 50
	       )  
	       ||
               (
		mVBI >= 50 && 
		modelines[i].verticalRefresh < mVBI &&
		modelines[i].verticalRefresh >= 50
	       )
	      )
	     )
	    )
	  )  
	  {
           mX=modelines[i].viewportWidth;
           mY=modelines[i].viewportHeight;
	   mVBI = modelines[i].verticalRefresh;
           j=i;
	   printf(".ok!!\n");
        }else{
           printf(".no\n");
	}
    }
  }
  X=(modelines[j].imageWidth-mX)/2;
  Y=(modelines[j].imageHeight-mY)/2;
  printf("vo_dga: Selected video mode %4d x %4d @ %3d Hz for image size %3d x %3d.\n", 
		  mX, mY, mVBI, width, height);  

  XF86DGASetViewPort (vo_dga_dpy, XDefaultScreen(vo_dga_dpy), X,Y);
  dgadevice=XDGASetMode(vo_dga_dpy, XDefaultScreen(vo_dga_dpy), modelines[j].num);
  XDGASync(vo_dga_dpy, XDefaultScreen(vo_dga_dpy));

  XFree(modelines);
  XFree(dgadevice);
  // end mode change code
#else
  printf("vo_dga: DGA 1.0 compatibility code\n");
#endif

  XF86DGAGetViewPortSize(vo_dga_dpy,XDefaultScreen(vo_dga_dpy),
		         &vo_dga_vp_width,
			 &vo_dga_vp_height); 

  XF86DGAGetVideo (vo_dga_dpy, XDefaultScreen(vo_dga_dpy), 
		   (char **)&vo_dga_base, &vo_dga_width, &bank, &ram);

#ifndef HAVE_DGA2
  XF86DGASetViewPort (vo_dga_dpy, XDefaultScreen(vo_dga_dpy), 0, 0);
#endif

  // do some more checkings here ...
  if( format==IMGFMT_YV12 ) 
    yuv2rgb_init( vo_depthonscreen, MODE_RGB );

  vo_dga_src_format = format;
  vo_dga_src_width = width;
  vo_dga_src_height = height;
  vo_dga_bpp = (vo_depthonscreen+7) >> 3;

  printf("vo_dga: bytes/line: %d, screen res: %dx%d, depth: %d, base: %08x, bpp: %d\n", 
          vo_dga_width, vo_dga_vp_width, 
          vo_dga_vp_height, vo_depthonscreen, vo_dga_base,
          vo_dga_bpp);
  printf("vo_dga: video res: %dx%d\n", vo_dga_src_width, vo_dga_src_height);

  if(vo_dga_src_width > vo_dga_vp_width ||
     vo_dga_src_height > vo_dga_vp_height){
    printf("vo_dga: Sorry, video larger than viewport is not yet supported!\n");
    // ugly, do something nicer in the future ...
    return 1;
  }

  x_off = (vo_dga_vp_width - vo_dga_src_width)>>1; 
  y_off = (vo_dga_vp_height - vo_dga_src_height)>>1;

  vo_dga_bytes_per_line = vo_dga_src_width * vo_dga_bpp; // todo
  vo_dga_lines = vo_dga_src_height;                      // todo


  vo_dga_src_offset = 0;
  vo_dga_vp_offset = (y_off * vo_dga_width + x_off ) * vo_dga_bpp;

  vo_dga_vp_skip = (vo_dga_width - vo_dga_src_width) * vo_dga_bpp;  // todo
    
  printf("vo_dga: vp_off=%d, vp_skip=%d, bpl=%d\n", 
         vo_dga_vp_offset, vo_dga_vp_skip, vo_dga_bytes_per_line);


  XF86DGADirectVideo (vo_dga_dpy, XDefaultScreen(vo_dga_dpy), 
                      XF86DGADirectGraphics | XF86DGADirectMouse | 
                      XF86DGADirectKeyb);
  
  XGrabKeyboard (vo_dga_dpy, DefaultRootWindow(vo_dga_dpy), True, 
                 GrabModeAsync,GrabModeAsync, CurrentTime);
  XGrabPointer (vo_dga_dpy, DefaultRootWindow(vo_dga_dpy), True, 
                ButtonPressMask,GrabModeAsync, GrabModeAsync, 
                None, None, CurrentTime);
   
  // now clear screen

  memset(vo_dga_base, 0, vo_dga_width * vo_dga_vp_height * vo_dga_bpp);  

  vo_dga_is_running = 1;
  return 0;
}

//---------------------------------------------------------

// deleted the old vo_dga_query_event() routine 'cause it is obsolete  
// since using check_events()
// acki2 on 30/3/2001