path: root/hw/kdrive/i810/i810_video.c

/* COPYRIGHT AND PERMISSION NOTICE

Copyright (c) 2000, 2001 Nokia Home Communications

All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, provided that the above
copyright notice(s) and this permission notice appear in all copies of
the Software and that both the above copyright notice(s) and this
permission notice appear in supporting documentation.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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Except as contained in this notice, the name of a copyright holder
shall not be used in advertising or otherwise to promote the sale, use
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/***************************************************************************
 
Copyright 2000 Intel Corporation.  All Rights Reserved. 

Permission is hereby granted, free of charge, to any person obtaining a 
copy of this software and associated documentation files (the 
"Software"), to deal in the Software without restriction, including 
without limitation the rights to use, copy, modify, merge, publish, 
distribute, sub license, and/or sell copies of the Software, and to 
permit persons to whom the Software is furnished to do so, subject to 
the following conditions: 

The above copyright notice and this permission notice (including the 
next paragraph) shall be included in all copies or substantial portions 
of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 
IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
THE USE OR OTHER DEALINGS IN THE SOFTWARE.

**************************************************************************/


/*
 * i810_video.c: i810 KDrive Xv driver. 
 *               Based on the XFree86 i810 Xv driver by Jonathan Bian.
 *
 * Authors: 
 * 	Jonathan Bian <jonathan.bian@intel.com>
 *      Pontus Lidman <pontus.lidman@nokia.com>
 *
 */

#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#include "kdrive.h"
#include "kxv.h"
#include "i810.h"

#include <X11/extensions/Xv.h>

#include "fourcc.h"

typedef struct {
    CARD32 size;
    CARD32 offset;
} FBLinearRec, *FBLinearPtr;

#define OFF_DELAY 	250  /* milliseconds */
#define FREE_DELAY 	15000

#define OFF_TIMER 	0x01
#define FREE_TIMER	0x02
#define CLIENT_VIDEO_ON	0x04

#define TIMER_MASK      (OFF_TIMER | FREE_TIMER)

static KdVideoAdaptorPtr i810SetupImageVideo(ScreenPtr);
static void i810StopVideo(KdScreenInfo *, pointer, Bool);
static int i810SetPortAttribute(KdScreenInfo *, Atom, int, pointer);
static int i810GetPortAttribute(KdScreenInfo *, Atom, int *, pointer);
static void i810QueryBestSize(KdScreenInfo *, Bool,
	short, short, short, short, unsigned int *, unsigned int *, pointer);
static int i810PutImage( KdScreenInfo *, DrawablePtr, 
	short, short, short, short, short, short, short, short,
	int, unsigned char*, short, short, Bool, RegionPtr, pointer);
static int i810QueryImageAttributes(KdScreenInfo *, 
	int, unsigned short *, unsigned short *,  int *, int *);

static void i810BlockHandler(int, pointer, pointer, pointer);

#define MAKE_ATOM(a) MakeAtom(a, sizeof(a) - 1, TRUE)

static Atom xvBrightness, xvContrast, xvColorKey;

#define IMAGE_MAX_WIDTH		720
#define IMAGE_MAX_HEIGHT	576
#define Y_BUF_SIZE		(IMAGE_MAX_WIDTH * IMAGE_MAX_HEIGHT)

#define OVERLAY_UPDATE(p)	OUTREG(0x30000, p | 0x80000000);

/*
 * OV0CMD - Overlay Command Register
 */
#define	VERTICAL_CHROMINANCE_FILTER 	0x70000000
#define VC_SCALING_OFF		0x00000000
#define VC_LINE_REPLICATION	0x10000000
#define VC_UP_INTERPOLATION	0x20000000
#define VC_PIXEL_DROPPING	0x50000000
#define VC_DOWN_INTERPOLATION	0x60000000
#define VERTICAL_LUMINANCE_FILTER	0x0E000000
#define VL_SCALING_OFF		0x00000000
#define VL_LINE_REPLICATION	0x02000000
#define VL_UP_INTERPOLATION	0x04000000
#define VL_PIXEL_DROPPING	0x0A000000
#define VL_DOWN_INTERPOLATION	0x0C000000
#define	HORIZONTAL_CHROMINANCE_FILTER 	0x01C00000
#define HC_SCALING_OFF		0x00000000
#define HC_LINE_REPLICATION	0x00400000
#define HC_UP_INTERPOLATION	0x00800000
#define HC_PIXEL_DROPPING	0x01400000
#define HC_DOWN_INTERPOLATION	0x01800000
#define HORIZONTAL_LUMINANCE_FILTER	0x00380000
#define HL_SCALING_OFF		0x00000000
#define HL_LINE_REPLICATION	0x00080000
#define HL_UP_INTERPOLATION	0x00100000
#define HL_PIXEL_DROPPING	0x00280000
#define HL_DOWN_INTERPOLATION	0x00300000

#define Y_ADJUST		0x00010000	
#define OV_BYTE_ORDER		0x0000C000
#define UV_SWAP			0x00004000
#define Y_SWAP			0x00008000
#define Y_AND_UV_SWAP		0x0000C000
#define SOURCE_FORMAT		0x00003C00
#define	RGB_555			0x00000800
#define	RGB_565			0x00000C00
#define	YUV_422			0x00002000
#define	YUV_411			0x00002400
#define	YUV_420			0x00003000
#define	YUV_410			0x00003800
#define BUFFER_AND_FIELD	0x00000006
#define	BUFFER0_FIELD0		0x00000000
#define	BUFFER1_FIELD0		0x00000004
#define OVERLAY_ENABLE		0x00000001

/*
 * DOV0STA - Display/Overlay 0 Status Register
 */
#define	DOV0STA 	0x30008

#define MINUV_SCALE	0x1

#define RGB16ToColorKey(c) \
	(((c & 0xF800) << 8) | ((c & 0x07E0) << 5) | ((c & 0x001F) << 3))

#define RGB15ToColorKey(c) \
        (((c & 0x7c00) << 9) | ((c & 0x03E0) << 6) | ((c & 0x001F) << 3))

Bool i810InitVideo(ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    KdScreenInfo *screen = pScreenPriv->screen;
    KdVideoAdaptorPtr *adaptors, *newAdaptors = NULL;
    KdVideoAdaptorPtr newAdaptor = NULL;
    int num_adaptors;

/*     fprintf(stderr,"i810InitVideo\n"); */
	
    if (screen->fb[0].bitsPerPixel != 8) 
    {
	newAdaptor = i810SetupImageVideo(pScreen);
    }

    num_adaptors = KdXVListGenericAdaptors(screen, &adaptors);

    if(newAdaptor) {
	if(!num_adaptors) {
	    num_adaptors = 1;
	    adaptors = &newAdaptor;
	} else {
	    newAdaptors =  /* need to free this someplace */
		xalloc((num_adaptors + 1) * sizeof(KdVideoAdaptorPtr*));
	    if(newAdaptors) {
		memcpy(newAdaptors, adaptors, num_adaptors * 
					sizeof(KdVideoAdaptorPtr));
		newAdaptors[num_adaptors] = newAdaptor;
		adaptors = newAdaptors;
		num_adaptors++;
	    }
	}
    }

    if(num_adaptors)
        KdXVScreenInit(pScreen, adaptors, num_adaptors);

    if(newAdaptors)
        xfree(newAdaptors);
    return TRUE;
}

/* client libraries expect an encoding */
static KdVideoEncodingRec DummyEncoding[1] =
{
 {
   0,
   "XV_IMAGE",
   IMAGE_MAX_WIDTH, IMAGE_MAX_HEIGHT,
   {1, 1}
 }
};

#define NUM_FORMATS 3

static KdVideoFormatRec Formats[NUM_FORMATS] = 
{
  {15, TrueColor}, {16, TrueColor}, {24, TrueColor}
};

#define NUM_ATTRIBUTES 3

static KdAttributeRec Attributes[NUM_ATTRIBUTES] =
{
   {XvSettable | XvGettable, 0, (1 << 24) - 1, "XV_COLORKEY"},
   {XvSettable | XvGettable, -128, 127, "XV_BRIGHTNESS"},
   {XvSettable | XvGettable, 0, 255, "XV_CONTRAST"}
};

#define NUM_IMAGES 4

static KdImageRec Images[NUM_IMAGES] =
{
	XVIMAGE_YUY2,
	XVIMAGE_YV12,
	XVIMAGE_I420,
	XVIMAGE_UYVY
};

typedef struct {
    CARD32 OBUF_0Y;
    CARD32 OBUF_1Y;
    CARD32 OBUF_0U;
    CARD32 OBUF_0V;
    CARD32 OBUF_1U;
    CARD32 OBUF_1V;
    CARD32 OV0STRIDE;
    CARD32 YRGB_VPH;
    CARD32 UV_VPH;
    CARD32 HORZ_PH;
    CARD32 INIT_PH;
    CARD32 DWINPOS;
    CARD32 DWINSZ;
    CARD32 SWID;
    CARD32 SWIDQW;
    CARD32 SHEIGHT;
    CARD32 YRGBSCALE;
    CARD32 UVSCALE;
    CARD32 OV0CLRC0;
    CARD32 OV0CLRC1;
    CARD32 DCLRKV;
    CARD32 DCLRKM;
    CARD32 SCLRKVH;
    CARD32 SCLRKVL;
    CARD32 SCLRKM;
    CARD32 OV0CONF;
    CARD32 OV0CMD;
} I810OverlayRegRec, *I810OverlayRegPtr;

typedef struct {
	CARD32       YBuf0offset;
	CARD32       UBuf0offset;
	CARD32       VBuf0offset;

	CARD32       YBuf1offset;
	CARD32       UBuf1offset;
	CARD32       VBuf1offset;

	unsigned char currentBuf;

	unsigned char brightness;
	unsigned char contrast;

	RegionRec    clip;
	CARD32       colorKey;

	CARD32       videoStatus;
	Time         offTime;
	Time         freeTime;
    FBLinearPtr  linear;
} I810PortPrivRec, *I810PortPrivPtr;        

#define GET_PORT_PRIVATE(screen) \
   (I810PortPrivPtr)(((I810CardInfo *) (screen->card->driver))->adaptor->pPortPrivates[0].ptr)

static void i810ResetVideo(KdScreenInfo *screen) 
{
    ScreenPtr pScreen = screen->pScreen;
    KdScreenPriv(pScreen);
    KdCardInfo *card = pScreenPriv->card;
    I810CardInfo *i810c = (I810CardInfo *) card->driver;

    I810PortPrivPtr pPriv = i810c->adaptor->pPortPrivates[0].ptr;
    I810OverlayRegPtr overlay = (I810OverlayRegPtr) (i810c->FbBase + i810c->OverlayStart); 

    /*
     * Default to maximum image size in YV12
     */

    overlay->YRGB_VPH = 0;
    overlay->UV_VPH = 0;
    overlay->HORZ_PH = 0;
    overlay->INIT_PH = 0;
    overlay->DWINPOS = 0;
    overlay->DWINSZ = (IMAGE_MAX_HEIGHT << 16) | IMAGE_MAX_WIDTH; 
    overlay->SWID =  IMAGE_MAX_WIDTH | (IMAGE_MAX_WIDTH << 15);       
    overlay->SWIDQW = (IMAGE_MAX_WIDTH >> 3) | (IMAGE_MAX_WIDTH << 12);
    overlay->SHEIGHT = IMAGE_MAX_HEIGHT | (IMAGE_MAX_HEIGHT << 15);
    overlay->YRGBSCALE = 0x80004000; /* scale factor 1 */
    overlay->UVSCALE = 0x80004000; /* scale factor 1 */
    overlay->OV0CLRC0 = 0x4000; /* brightness: 0 contrast: 1.0 */
    overlay->OV0CLRC1 = 0x80; /* saturation: bypass */

    /*
     * Enable destination color keying
     */
    switch(screen->fb[0].depth) {
    case 16: overlay->DCLRKV = RGB16ToColorKey(pPriv->colorKey);
             overlay->DCLRKM = 0x80070307;
             break;
    case 15: overlay->DCLRKV = RGB15ToColorKey(pPriv->colorKey);
             overlay->DCLRKM = 0x80070707;
             break;
    default: overlay->DCLRKV = pPriv->colorKey;
             overlay->DCLRKM = 0x80000000;
             break;
    }

    overlay->SCLRKVH = 0;
    overlay->SCLRKVL = 0;
    overlay->SCLRKM = 0; /* source color key disable */
    overlay->OV0CONF = 0; /* two 720 pixel line buffers */ 

    overlay->OV0CMD = VC_UP_INTERPOLATION | HC_UP_INTERPOLATION | Y_ADJUST |
		      YUV_420;

    OVERLAY_UPDATE(i810c->OverlayPhysical);
}


static KdVideoAdaptorPtr 
i810SetupImageVideo(ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    KdScreenInfo *screen = pScreenPriv->screen;
    KdCardInfo *card = pScreenPriv->card;
    I810CardInfo  *i810c = (I810CardInfo *) card->driver;


    KdVideoAdaptorPtr adapt;
    I810PortPrivPtr pPriv;

/*     fprintf(stderr,"i810SetupImageVideo\n"); */

    if(!(adapt = xcalloc(1, sizeof(KdVideoAdaptorRec) +
			    sizeof(I810PortPrivRec) +
			    sizeof(DevUnion))))
	return NULL;

    adapt->type = XvWindowMask | XvInputMask | XvImageMask;
    adapt->flags = VIDEO_OVERLAID_IMAGES | VIDEO_CLIP_TO_VIEWPORT;
    adapt->name = "I810 Video Overlay";
    adapt->nEncodings = 1;
    adapt->pEncodings = DummyEncoding;
    adapt->nFormats = NUM_FORMATS;
    adapt->pFormats = Formats;
    adapt->nPorts = 1;
    adapt->pPortPrivates = (DevUnion*)(&adapt[1]);

    pPriv = (I810PortPrivPtr)(&adapt->pPortPrivates[1]);

    adapt->pPortPrivates[0].ptr = (pointer)(pPriv);
    adapt->pAttributes = Attributes;
    adapt->nImages = NUM_IMAGES;
    adapt->nAttributes = NUM_ATTRIBUTES;
    adapt->pImages = Images;
    adapt->PutVideo = NULL;
    adapt->PutStill = NULL;
    adapt->GetVideo = NULL;
    adapt->GetStill = NULL;
    adapt->StopVideo = i810StopVideo;
    adapt->SetPortAttribute = i810SetPortAttribute;
    adapt->GetPortAttribute = i810GetPortAttribute;
    adapt->QueryBestSize = i810QueryBestSize;
    adapt->PutImage = i810PutImage;
    adapt->QueryImageAttributes = i810QueryImageAttributes;

    pPriv->colorKey = i810c->colorKey & ((1 << screen->fb[0].depth) - 1);
    pPriv->videoStatus = 0;
    pPriv->brightness = 0;
    pPriv->contrast = 128;
    pPriv->linear = NULL;
    pPriv->currentBuf = 0;

    /* gotta uninit this someplace */
    REGION_INIT(pScreen, &pPriv->clip, NullBox, 0); 

    i810c->adaptor = adapt;

    i810c->BlockHandler = pScreen->BlockHandler;
    pScreen->BlockHandler = i810BlockHandler;

    xvBrightness = MAKE_ATOM("XV_BRIGHTNESS");
    xvContrast   = MAKE_ATOM("XV_CONTRAST");
    xvColorKey   = MAKE_ATOM("XV_COLORKEY");

    i810ResetVideo(screen);

    return adapt;
}


/* I810ClipVideo -  

   Takes the dst box in standard X BoxRec form (top and left
   edges inclusive, bottom and right exclusive).  The new dst
   box is returned.  The source boundaries are given (x1, y1 
   inclusive, x2, y2 exclusive) and returned are the new source 
   boundaries in 16.16 fixed point. 
*/

static void
I810ClipVideo(
  BoxPtr dst, 
  INT32 *x1, 
  INT32 *x2, 
  INT32 *y1, 
  INT32 *y2,
  BoxPtr extents,            /* extents of the clip region */
  INT32 width, 
  INT32 height
){
    INT32 vscale, hscale, delta;
    int diff;

    hscale = ((*x2 - *x1) << 16) / (dst->x2 - dst->x1);
    vscale = ((*y2 - *y1) << 16) / (dst->y2 - dst->y1);

    *x1 <<= 16; *x2 <<= 16;
    *y1 <<= 16; *y2 <<= 16;

    diff = extents->x1 - dst->x1;
    if(diff > 0) {
	dst->x1 = extents->x1;
	*x1 += diff * hscale;     
    }
    diff = dst->x2 - extents->x2;
    if(diff > 0) {
	dst->x2 = extents->x2;
	*x2 -= diff * hscale;     
    }
    diff = extents->y1 - dst->y1;
    if(diff > 0) {
	dst->y1 = extents->y1;
	*y1 += diff * vscale;     
    }
    diff = dst->y2 - extents->y2;
    if(diff > 0) {
	dst->y2 = extents->y2;
	*y2 -= diff * vscale;     
    }

    if(*x1 < 0) {
	diff =  (- *x1 + hscale - 1)/ hscale;
	dst->x1 += diff;
	*x1 += diff * hscale;
    }
    delta = *x2 - (width << 16);
    if(delta > 0) {
	diff = (delta + hscale - 1)/ hscale;
	dst->x2 -= diff;
	*x2 -= diff * hscale;
    }
    if(*y1 < 0) {
	diff =  (- *y1 + vscale - 1)/ vscale;
	dst->y1 += diff;
	*y1 += diff * vscale;
    }
    delta = *y2 - (height << 16);
    if(delta > 0) {
	diff = (delta + vscale - 1)/ vscale;
	dst->y2 -= diff;
	*y2 -= diff * vscale;
    }
} 

static void 
i810StopVideo(KdScreenInfo *screen, pointer data, Bool exit)
{
  I810PortPrivPtr pPriv = (I810PortPrivPtr)data;
  KdCardInfo *card = screen->card;
  I810CardInfo	*i810c = (I810CardInfo *) card->driver;  

  I810OverlayRegPtr overlay = (I810OverlayRegPtr) (i810c->FbBase + i810c->OverlayStart); 

  REGION_EMPTY(screen->pScreen, &pPriv->clip);   

  if(exit) {
     if(pPriv->videoStatus & CLIENT_VIDEO_ON) {
	overlay->OV0CMD &= 0xFFFFFFFE;
	OVERLAY_UPDATE(i810c->OverlayPhysical);
     }
     if(pPriv->linear) {
         xfree(pPriv->linear);
         pPriv->linear = NULL;
     }
     pPriv->videoStatus = 0;
  } else {
     if(pPriv->videoStatus & CLIENT_VIDEO_ON) {
	pPriv->videoStatus |= OFF_TIMER;
	pPriv->offTime = currentTime.milliseconds + OFF_DELAY; 
     }
  }

}

static int 
i810SetPortAttribute(
  KdScreenInfo *screen, 
  Atom attribute,
  int value, 
  pointer data
){
  I810PortPrivPtr pPriv = (I810PortPrivPtr)data;
  KdCardInfo *card = screen->card;
  I810CardInfo	*i810c = (I810CardInfo *) card->driver;

  I810OverlayRegPtr overlay = (I810OverlayRegPtr) (i810c->FbBase + i810c->OverlayStart); 

  if(attribute == xvBrightness) {
	if((value < -128) || (value > 127))
	   return BadValue;
	pPriv->brightness = value;
	overlay->OV0CLRC0 &= 0xFFFFFF00;
	overlay->OV0CLRC0 |= value;
	OVERLAY_UPDATE(i810c->OverlayPhysical);
  } else
  if(attribute == xvContrast) {
	if((value < 0) || (value > 255))
	   return BadValue;
	pPriv->contrast = value;
	overlay->OV0CLRC0 &= 0xFFFE00FF;
	overlay->OV0CLRC0 |= value << 9;
	OVERLAY_UPDATE(i810c->OverlayPhysical);
  } else
  if(attribute == xvColorKey) {
	pPriv->colorKey = value;
	switch(screen->fb[0].depth) {
	case 16: overlay->DCLRKV = RGB16ToColorKey(pPriv->colorKey);
	         break;
	case 15: overlay->DCLRKV = RGB15ToColorKey(pPriv->colorKey);
                 break;
	default: overlay->DCLRKV = pPriv->colorKey;
                 break;
	}
	OVERLAY_UPDATE(i810c->OverlayPhysical);
	REGION_EMPTY(screen->pScreen, &pPriv->clip);   
  } else return BadMatch;

  return Success;
}

static int 
i810GetPortAttribute(
  KdScreenInfo *screen, 
  Atom attribute,
  int *value, 
  pointer data
){
  I810PortPrivPtr pPriv = (I810PortPrivPtr)data;

  if(attribute == xvBrightness) {
	*value = pPriv->brightness;
  } else
  if(attribute == xvContrast) {
	*value = pPriv->contrast;
  } else
  if(attribute == xvColorKey) {
	*value = pPriv->colorKey;
  } else return BadMatch;

  return Success;
}

static void 
i810QueryBestSize(
  KdScreenInfo *screen, 
  Bool motion,
  short vid_w, short vid_h, 
  short drw_w, short drw_h, 
  unsigned int *p_w, unsigned int *p_h, 
  pointer data
){
  *p_w = drw_w;
  *p_h = drw_h; 
}


static void
I810CopyPackedData(
   KdScreenInfo *screen, 
   unsigned char *buf,
   int srcPitch,
   int dstPitch,
   int top,
   int left,
   int h,
   int w
   )
{
  KdCardInfo *card = screen->card;
  I810CardInfo	*i810c = (I810CardInfo *) card->driver;
    I810PortPrivPtr pPriv = i810c->adaptor->pPortPrivates[0].ptr;
    unsigned char *src, *dst;
    
    src = buf + (top*srcPitch) + (left<<1);

    if (pPriv->currentBuf == 0)
	dst = i810c->FbBase + pPriv->YBuf0offset;
    else
	dst = i810c->FbBase + pPriv->YBuf1offset;

    w <<= 1;
    while(h--) {
	memcpy(dst, src, w);
	src += srcPitch;
	dst += dstPitch;
    }
}

static void
i810CopyPlanarData(
   KdScreenInfo *screen, 
   unsigned char *buf,
   int srcPitch,
   int dstPitch,  /* of chroma */
   int srcH,
   int top,
   int left,
   int h,
   int w,
   int id
   )
{
  KdCardInfo *card = screen->card;
  I810CardInfo	*i810c = (I810CardInfo *) card->driver;
    I810PortPrivPtr pPriv = i810c->adaptor->pPortPrivates[0].ptr;
    int i;
    unsigned char *src1, *src2, *src3, *dst1, *dst2, *dst3;

    /* Copy Y data */
    src1 = buf + (top*srcPitch) + left;
    if (pPriv->currentBuf == 0)
	dst1 = i810c->FbBase + pPriv->YBuf0offset;
    else
	dst1 = i810c->FbBase + pPriv->YBuf1offset;

    for (i = 0; i < h; i++) {
	memcpy(dst1, src1, w);
	src1 += srcPitch;
	dst1 += dstPitch << 1;
    }

    /* Copy V data for YV12, or U data for I420 */
    src2 = buf + (srcH*srcPitch) + ((top*srcPitch)>>2) + (left>>1);
    if (pPriv->currentBuf == 0) {
	if (id == FOURCC_I420)
	    dst2 = i810c->FbBase + pPriv->UBuf0offset;
	else
	    dst2 = i810c->FbBase + pPriv->VBuf0offset;
    } else {
	if (id == FOURCC_I420)
	    dst2 = i810c->FbBase + pPriv->UBuf1offset;
	else
	    dst2 = i810c->FbBase + pPriv->VBuf1offset;
    }

    for (i = 0; i < h/2; i++) {
	memcpy(dst2, src2, w/2);
	src2 += srcPitch>>1;
	dst2 += dstPitch;
    }

    /* Copy U data for YV12, or V data for I420 */
    src3 = buf + (srcH*srcPitch) + ((srcH*srcPitch)>>2) + ((top*srcPitch)>>2) + (left>>1);
    if (pPriv->currentBuf == 0) {
	if (id == FOURCC_I420) 
	    dst3 = i810c->FbBase + pPriv->VBuf0offset;
	else
	    dst3 = i810c->FbBase + pPriv->UBuf0offset;
    } else {
	if (id == FOURCC_I420) 
	    dst3 = i810c->FbBase + pPriv->VBuf1offset;
	else
	    dst3 = i810c->FbBase + pPriv->UBuf1offset;
    }
    
    for (i = 0; i < h/2; i++) {
	memcpy(dst3, src3, w/2);
	src3 += srcPitch>>1;
	dst3 += dstPitch;
    }
}

static void
i810DisplayVideo(
    KdScreenInfo *screen,
    int id,
    short width, short height,
    int dstPitch,  /* of chroma for 4:2:0 */
    int x1, int y1, int x2, int y2,
    BoxPtr dstBox,
    short src_w, short src_h,
    short drw_w, short drw_h
){
  KdCardInfo *card = screen->card;
  I810CardInfo	*i810c = (I810CardInfo *) card->driver;
    I810PortPrivPtr pPriv = i810c->adaptor->pPortPrivates[0].ptr;
    I810OverlayRegPtr overlay = (I810OverlayRegPtr) (i810c->FbBase + i810c->OverlayStart); 
    int xscaleInt, xscaleFract, yscaleInt, yscaleFract;
    int xscaleIntUV = 0, xscaleFractUV = 0, yscaleIntUV = 0, yscaleFractUV = 0;
    unsigned int swidth;

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
	swidth = (width + 7) & ~7;
	overlay->SWID = (swidth << 15) | swidth;
	overlay->SWIDQW = (swidth << 12) | (swidth >> 3);
	break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
	swidth = ((width + 3) & ~3) << 1;
	overlay->SWID = swidth;
	overlay->SWIDQW = swidth >> 3;
	break;
    }

    overlay->SHEIGHT = height | (height << 15);
    overlay->DWINPOS = (dstBox->y1 << 16) | dstBox->x1;
    overlay->DWINSZ = ((dstBox->y2 - dstBox->y1) << 16) | 
	              (dstBox->x2 - dstBox->x1);

    /* buffer locations */
    overlay->OBUF_0Y = pPriv->YBuf0offset;
    overlay->OBUF_1Y = pPriv->YBuf1offset;
    overlay->OBUF_0U = pPriv->UBuf0offset; 
    overlay->OBUF_0V = pPriv->VBuf0offset;
    overlay->OBUF_1U = pPriv->UBuf1offset;
    overlay->OBUF_1V = pPriv->VBuf1offset;

    /* 
     * Calculate horizontal and vertical scaling factors, default to 1:1
     */
    overlay->YRGBSCALE = 0x80004000;
    overlay->UVSCALE = 0x80004000;

    /* 
     * Initially, YCbCr and Overlay Enable and
     * vertical chrominance up interpolation and horozontal chrominance
     * up interpolation
     */
    overlay->OV0CMD = VC_UP_INTERPOLATION | HC_UP_INTERPOLATION | Y_ADJUST | 
	              OVERLAY_ENABLE; 

    if ((drw_w != src_w) || (drw_h != src_h)) 
    {
	xscaleInt = (src_w / drw_w) & 0x3;
	xscaleFract = (src_w << 12) / drw_w;
	yscaleInt = (src_h / drw_h) & 0x3;
	yscaleFract = (src_h << 12) / drw_h;

	overlay->YRGBSCALE = (xscaleInt << 15) | 
	                     ((xscaleFract & 0xFFF) << 3) |
	                     (yscaleInt) |
			     ((yscaleFract & 0xFFF) << 20);

	if (drw_w > src_w) 
	{
	    /* horizontal up-scaling */
	    overlay->OV0CMD &= ~HORIZONTAL_CHROMINANCE_FILTER;
	    overlay->OV0CMD &= ~HORIZONTAL_LUMINANCE_FILTER;
	    overlay->OV0CMD |= (HC_UP_INTERPOLATION | HL_UP_INTERPOLATION);
	}

	if (drw_h > src_h) 
	{ 
	    /* vertical up-scaling */
	    overlay->OV0CMD &= ~VERTICAL_CHROMINANCE_FILTER;
	    overlay->OV0CMD &= ~VERTICAL_LUMINANCE_FILTER;
	    overlay->OV0CMD |= (VC_UP_INTERPOLATION | VL_UP_INTERPOLATION);
	}

	if (drw_w < src_w) 
	{ 
	    /* horizontal down-scaling */
	    overlay->OV0CMD &= ~HORIZONTAL_CHROMINANCE_FILTER;
	    overlay->OV0CMD &= ~HORIZONTAL_LUMINANCE_FILTER;
	    overlay->OV0CMD |= (HC_DOWN_INTERPOLATION | HL_DOWN_INTERPOLATION);
	}

	if (drw_h < src_h) 
	{ 
	    /* vertical down-scaling */
	    overlay->OV0CMD &= ~VERTICAL_CHROMINANCE_FILTER;
	    overlay->OV0CMD &= ~VERTICAL_LUMINANCE_FILTER;
	    overlay->OV0CMD |= (VC_DOWN_INTERPOLATION | VL_DOWN_INTERPOLATION);
	}

	/* now calculate the UV scaling factor */

	if (xscaleFract)
	{
	    xscaleFractUV = xscaleFract >> MINUV_SCALE;
	    overlay->OV0CMD &= ~HC_DOWN_INTERPOLATION;
	    overlay->OV0CMD |= HC_UP_INTERPOLATION;
	}

	if (xscaleInt)
	{
	    xscaleIntUV = xscaleInt >> MINUV_SCALE;
	    if (xscaleIntUV)
	    {
		overlay->OV0CMD &= ~HC_UP_INTERPOLATION;
	    }
	}

	if (yscaleFract)
	{
	    yscaleFractUV = yscaleFract >> MINUV_SCALE;
	    overlay->OV0CMD &= ~VC_DOWN_INTERPOLATION;
	    overlay->OV0CMD |= VC_UP_INTERPOLATION;
	}

	if (yscaleInt)
	{
	    yscaleIntUV = yscaleInt >> MINUV_SCALE;
	    if (yscaleIntUV)
	    {
		overlay->OV0CMD &= ~VC_UP_INTERPOLATION;
		overlay->OV0CMD |= VC_DOWN_INTERPOLATION;
	    }
	}

	overlay->UVSCALE = yscaleIntUV | ((xscaleFractUV & 0xFFF) << 3) |
	                   ((yscaleFractUV & 0xFFF) << 20);
    }

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
	overlay->OV0STRIDE = (dstPitch << 1) | (dstPitch << 16);
	overlay->OV0CMD &= ~SOURCE_FORMAT;
	overlay->OV0CMD |= YUV_420;
	break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
	overlay->OV0STRIDE = dstPitch;
	overlay->OV0CMD &= ~SOURCE_FORMAT;
	overlay->OV0CMD |= YUV_422;
	overlay->OV0CMD &= ~OV_BYTE_ORDER;
	if (id == FOURCC_UYVY)
	    overlay->OV0CMD |= Y_SWAP;
	break;
    }

    overlay->OV0CMD &= ~BUFFER_AND_FIELD;
    if (pPriv->currentBuf == 0)
	overlay->OV0CMD |= BUFFER0_FIELD0;
    else
	overlay->OV0CMD |= BUFFER1_FIELD0;

    OVERLAY_UPDATE(i810c->OverlayPhysical);

}

static FBLinearPtr
i810AllocateMemory(
  KdScreenInfo *screen,
  FBLinearPtr linear,
  int size
){
    KdCardInfo *card=screen->card;
    I810CardInfo *i810c = (I810CardInfo *) card->driver;
    FBLinearPtr new_linear;
  
    if(linear) {
	if(linear->size >= size)
            return linear;
        else
            ErrorF("Ran out of memory for overlay buffer, requested size = %d\n",size);
    }
    
   new_linear = xalloc(sizeof(FBLinearRec));
   new_linear->size = i810c->XvMem.Size;
   new_linear->offset = i810c->XvMem.Start;

/*    fprintf(stderr,"Overlay mem offset %lx\n",new_linear->offset); */

   return new_linear;
}

static int
i810PutImage(KdScreenInfo	    *screen, 
	       DrawablePtr	    pDraw,
	       short		    src_x,
	       short		    src_y,
	       short		    drw_x,
	       short		    drw_y,
	       short		    src_w,
	       short		    src_h,
	       short		    drw_w,
	       short		    drw_h,
	       int		     id,
	       unsigned char	    *buf,
	       short		    width,
	       short		    height,
	       Bool		    sync,
	       RegionPtr	    clipBoxes,
	       pointer		    data)
{
    KdCardInfo *card = screen->card;
    I810CardInfo *i810c = (I810CardInfo *) card->driver;
    I810PortPrivPtr pPriv = (I810PortPrivPtr)data;
    INT32 x1, x2, y1, y2;
    int srcPitch, dstPitch;
    int top, left, npixels, nlines, size;
    BoxRec dstBox;

    /* Clip */
    x1 = src_x;
    x2 = src_x + src_w;
    y1 = src_y;
    y2 = src_y + src_h;

    dstBox.x1 = drw_x;
    dstBox.x2 = drw_x + drw_w;
    dstBox.y1 = drw_y;
    dstBox.y2 = drw_y + drw_h;

    I810ClipVideo(&dstBox, &x1, &x2, &y1, &y2, 
		  REGION_EXTENTS(pScreen, clipBoxes), width, height);

    if((x1 >= x2) || (y1 >= y2))
       return Success;

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
	 srcPitch = (width + 3) & ~3;
	 dstPitch = ((width >> 1) + 7) & ~7;  /* of chroma */
	 size =  dstPitch * height * 3;	
	 break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
	 srcPitch = (width << 1);
	 dstPitch = (srcPitch + 7) & ~7;
	 size = dstPitch * height;
	 break;
    }  

    if(!(pPriv->linear = i810AllocateMemory(screen, pPriv->linear, 
		(screen->fb[0].bitsPerPixel == 16) ? size : (size >> 1))))
	return BadAlloc;

    /* fixup pointers */
    pPriv->YBuf0offset = pPriv->linear->offset;
    pPriv->UBuf0offset = pPriv->YBuf0offset + (dstPitch * 2 * height);
    pPriv->VBuf0offset = pPriv->UBuf0offset + (dstPitch * height >> 1);
    
    pPriv->YBuf1offset = pPriv->linear->offset + size;
    pPriv->UBuf1offset = pPriv->YBuf1offset + (dstPitch * 2 * height);
    pPriv->VBuf1offset = pPriv->UBuf1offset + (dstPitch * height >> 1);

    /* wait for the last rendered buffer to be flipped in */
    while (((INREG(DOV0STA)&0x00100000)>>20) != pPriv->currentBuf);

    /* buffer swap */
    if (pPriv->currentBuf == 0)
        pPriv->currentBuf = 1;
    else
        pPriv->currentBuf = 0;

    /* copy data */
    top = y1 >> 16;
    left = (x1 >> 16) & ~1;
    npixels = ((((x2 + 0xffff) >> 16) + 1) & ~1) - left;

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
	top &= ~1;
	nlines = ((((y2 + 0xffff) >> 16) + 1) & ~1) - top;
	i810CopyPlanarData(screen, buf, srcPitch, dstPitch,  height, top, left, 
                           nlines, npixels, id);
	break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
	nlines = ((y2 + 0xffff) >> 16) - top;
	I810CopyPackedData(screen, buf, srcPitch, dstPitch, top, left, nlines, 
                                                              npixels);
        break;
    }

    /* update cliplist */
    if(!REGION_EQUAL(screen->pScreen, &pPriv->clip, clipBoxes)) {
	REGION_COPY(screen->pScreen, &pPriv->clip, clipBoxes);
	KXVPaintRegion (pDraw, &pPriv->clip, pPriv->colorKey);
    }


    i810DisplayVideo(screen, id, width, height, dstPitch, 
	     x1, y1, x2, y2, &dstBox, src_w, src_h, drw_w, drw_h);

    pPriv->videoStatus = CLIENT_VIDEO_ON;

    return Success;
}


static int 
i810QueryImageAttributes(
  KdScreenInfo *screen, 
  int id, 
  unsigned short *w, unsigned short *h, 
  int *pitches, int *offsets
){
    int size, tmp;

    if(*w > 720) *w = 720;
    if(*h > 576) *h = 576;

    *w = (*w + 1) & ~1;
    if(offsets) offsets[0] = 0;

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
	*h = (*h + 1) & ~1;
	size = (*w + 3) & ~3;
	if(pitches) pitches[0] = size;
	size *= *h;
	if(offsets) offsets[1] = size;
	tmp = ((*w >> 1) + 3) & ~3;
	if(pitches) pitches[1] = pitches[2] = tmp;
	tmp *= (*h >> 1);
	size += tmp;
	if(offsets) offsets[2] = size;
	size += tmp;
	break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
	size = *w << 1;
	if(pitches) pitches[0] = size;
	size *= *h;
	break;
    }

    return size;
}

static void
i810BlockHandler (
    int i,
    pointer     blockData,
    pointer     pTimeout,
    pointer     pReadmask
){
    ScreenPtr   pScreen = screenInfo.screens[i];
    KdScreenPriv(pScreen);
    KdScreenInfo *screen = pScreenPriv->screen;
    KdCardInfo *card = screen->card;
    I810CardInfo	*i810c = (I810CardInfo *) card->driver;
    I810PortPrivPtr pPriv = GET_PORT_PRIVATE(screen);
    I810OverlayRegPtr overlay = (I810OverlayRegPtr) (i810c->FbBase + i810c->OverlayStart); 

    pScreen->BlockHandler = i810c->BlockHandler;
    
    (*pScreen->BlockHandler) (i, blockData, pTimeout, pReadmask);

    pScreen->BlockHandler = i810BlockHandler;

    if(pPriv->videoStatus & TIMER_MASK) {
	UpdateCurrentTime();
	if(pPriv->videoStatus & OFF_TIMER) {
	    if(pPriv->offTime < currentTime.milliseconds) {
		/* Turn off the overlay */
		overlay->OV0CMD &= 0xFFFFFFFE;
		OVERLAY_UPDATE(i810c->OverlayPhysical);

		pPriv->videoStatus = FREE_TIMER;
		pPriv->freeTime = currentTime.milliseconds + FREE_DELAY;
	    }
	} else {  /* FREE_TIMER */
	    if(pPriv->freeTime < currentTime.milliseconds) {
		if(pPriv->linear) {
                    xfree(pPriv->linear);
                    pPriv->linear = NULL;
		}
		pPriv->videoStatus = 0;
	    }
        }
    }
}