#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xf86.h"
#include "xf86_OSproc.h"
#include "compiler.h"
#include "xf86Pci.h"
#include "xf86fbman.h"
#include "regionstr.h"

#include "ct_driver.h"
#include <X11/extensions/Xv.h>
#include "dixstruct.h"
#include "fourcc.h"

#define OFF_DELAY 	200  /* milliseconds */
#define FREE_DELAY 	60000

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

#define TIMER_MASK      (OFF_TIMER | FREE_TIMER)

static XF86VideoAdaptorPtr CHIPSSetupImageVideo(ScreenPtr);
static void CHIPSInitOffscreenImages(ScreenPtr);
static void CHIPSStopVideo(ScrnInfoPtr, pointer, Bool);
static int CHIPSSetPortAttribute(ScrnInfoPtr, Atom, INT32, pointer);
static int CHIPSGetPortAttribute(ScrnInfoPtr, Atom ,INT32 *, pointer);
static void CHIPSQueryBestSize(ScrnInfoPtr, Bool,
	short, short, short, short, unsigned int *, unsigned int *, pointer);
static int CHIPSPutImage( ScrnInfoPtr, 
	short, short, short, short, short, short, short, short,
	int, unsigned char*, short, short, Bool, RegionPtr, pointer,
	DrawablePtr);
static int CHIPSQueryImageAttributes(ScrnInfoPtr, 
	int, unsigned short *, unsigned short *,  int *, int *);
static void CHIPSVideoTimerCallback(ScrnInfoPtr pScrn, Time time);


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

static Atom xvColorKey;

void 
CHIPSInitVideo(ScreenPtr pScreen)
{
    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
    XF86VideoAdaptorPtr *adaptors, *newAdaptors = NULL;
    XF86VideoAdaptorPtr newAdaptor = NULL;
    CHIPSPtr cPtr = CHIPSPTR(pScrn);
    int num_adaptors;
	
    if ((cPtr->Flags & ChipsVideoSupport)) {
	newAdaptor = CHIPSSetupImageVideo(pScreen);
	CHIPSInitOffscreenImages(pScreen);
    }

    num_adaptors = xf86XVListGenericAdaptors(pScrn, &adaptors);

    if(newAdaptor) {
	if(!num_adaptors) {
	    num_adaptors = 1;
	    adaptors = &newAdaptor;
	} else {
	    newAdaptors =  /* need to free this someplace */
		malloc((num_adaptors + 1) * sizeof(XF86VideoAdaptorPtr*));
	    if(newAdaptors) {
		memcpy(newAdaptors, adaptors, num_adaptors * 
					sizeof(XF86VideoAdaptorPtr));
		newAdaptors[num_adaptors] = newAdaptor;
		adaptors = newAdaptors;
		num_adaptors++;
	    }
	}
    }

    if(num_adaptors)
        xf86XVScreenInit(pScreen, adaptors, num_adaptors);

    free(newAdaptors);
}

/* client libraries expect an encoding */
static 
XF86VideoEncodingRec DummyEncoding[1] =
{
 {
   0,
   "XV_IMAGE",
   1024, 1024,
   {1, 1}
 }
};

#define NUM_FORMATS 4

static XF86VideoFormatRec Formats[NUM_FORMATS] = 
{
  {8, PseudoColor},  {15, TrueColor}, {16, TrueColor}, {24, TrueColor}
};

#define NUM_ATTRIBUTES 1

static XF86AttributeRec Attributes[NUM_ATTRIBUTES] =
{
   {XvSettable | XvGettable, 0, (1 << 24) - 1, "XV_COLORKEY"}
};

#define NUM_IMAGES 4

static XF86ImageRec Images[NUM_IMAGES] =
{
   {
	0x35315652,
        XvRGB,
	LSBFirst,
	{'R','V','1','5',
	  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
	16,
	XvPacked,
	1,
	15, 0x7C00, 0x03E0, 0x001F,
	0, 0, 0,
	0, 0, 0,
	0, 0, 0,
	{'R','V','B',0,
	  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
	XvTopToBottom
   },
   {
	0x36315652,
        XvRGB,
	LSBFirst,
	{'R','V','1','6',
	  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
	16,
	XvPacked,
	1,
	16, 0xF800, 0x07E0, 0x001F,
	0, 0, 0,
	0, 0, 0,
	0, 0, 0,
	{'R','V','B',0,
	  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
	XvTopToBottom
   },
   XVIMAGE_YV12,
   XVIMAGE_YUY2
};

typedef struct {
   FBLinearPtr	linear;
   RegionRec	clip;
   CARD32	colorKey;
   CARD32	videoStatus;
   Time		offTime;
   Time		freeTime;
   Bool         doubleBuffer;
   Bool         manualDoubleBuffer;
   int          currentBuffer;
} CHIPSPortPrivRec, *CHIPSPortPrivPtr;


#define GET_PORT_PRIVATE(pScrn) \
   (CHIPSPortPrivPtr)((CHIPSPTR(pScrn))->adaptor->pPortPrivates[0].ptr)

void 
CHIPSResetVideo(ScrnInfoPtr pScrn) 
{
    CHIPSPtr cPtr = CHIPSPTR(pScrn);
    CHIPSPortPrivPtr pPriv = cPtr->adaptor->pPortPrivates[0].ptr;
    unsigned char mr3c;
    int red, green, blue;
    
#ifdef HAVE_XAA_H
    if (cPtr->Flags & ChipsAccelSupport) 
	CHIPSHiQVSync(pScrn);
#endif

    mr3c = cPtr->readMR(cPtr, 0x3C);
    cPtr->writeMR(cPtr, 0x3C, (mr3c | 0x6));
    switch (pScrn->depth) {
    case 8:
	cPtr->writeMR(cPtr, 0x3D, 0x00);
	cPtr->writeMR(cPtr, 0x3E, 0x00);
	cPtr->writeMR(cPtr, 0x3F, (pPriv->colorKey & 0xFF));
	cPtr->writeMR(cPtr, 0x40, 0xFF);
	cPtr->writeMR(cPtr, 0x41, 0xFF);
	cPtr->writeMR(cPtr, 0x42, 0x00);
	break;
    default:
	red = (pPriv->colorKey & pScrn->mask.red) >> pScrn->offset.red;
	green = (pPriv->colorKey & pScrn->mask.green) >> pScrn->offset.green;
	blue = (pPriv->colorKey & pScrn->mask.blue) >> pScrn->offset.blue;
	switch (pScrn->depth) {
	case 15:
	    cPtr->writeMR(cPtr, 0x3D, (red << 3));
	    cPtr->writeMR(cPtr, 0x3E, (green << 3));
	    cPtr->writeMR(cPtr, 0x3F, (blue << 3));
	    cPtr->writeMR(cPtr, 0x40, 0x07);
	    cPtr->writeMR(cPtr, 0x41, 0x07);
	    cPtr->writeMR(cPtr, 0x42, 0x07);
	    break;
	case 16:
	    cPtr->writeMR(cPtr, 0x3D, (red << 3));
	    cPtr->writeMR(cPtr, 0x3E, (green << 2));
	    cPtr->writeMR(cPtr, 0x3F, (blue << 3));
	    cPtr->writeMR(cPtr, 0x40, 0x07);
	    cPtr->writeMR(cPtr, 0x41, 0x03);
	    cPtr->writeMR(cPtr, 0x42, 0x07);
	    break;
	case 24:
	    cPtr->writeMR(cPtr, 0x3D, red);
	    cPtr->writeMR(cPtr, 0x3E, green);
	    cPtr->writeMR(cPtr, 0x3F, blue);
	    cPtr->writeMR(cPtr, 0x40, 0x00);
	    cPtr->writeMR(cPtr, 0x41, 0x00);
	    cPtr->writeMR(cPtr, 0x42, 0x00);
	    break;
	}    
    }    
}


static XF86VideoAdaptorPtr 
CHIPSSetupImageVideo(ScreenPtr pScreen)
{
    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
    CHIPSPtr cPtr = CHIPSPTR(pScrn);
    XF86VideoAdaptorPtr adapt;
    CHIPSPortPrivPtr pPriv;

    if(!(adapt = calloc(1, sizeof(XF86VideoAdaptorRec) +
			   sizeof(CHIPSPortPrivRec) +
			   sizeof(DevUnion))))
	return NULL;

    adapt->type = XvWindowMask | XvInputMask | XvImageMask;
    adapt->flags = VIDEO_OVERLAID_IMAGES | VIDEO_CLIP_TO_VIEWPORT;
    adapt->name = "Chips and Technologies Backend Scaler";
    adapt->nEncodings = 1;
    adapt->pEncodings = DummyEncoding;
    adapt->nFormats = NUM_FORMATS;
    adapt->pFormats = Formats;
    adapt->nPorts = 1;
    adapt->pPortPrivates = (DevUnion*)(&adapt[1]);
    pPriv = (CHIPSPortPrivPtr)(&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 = CHIPSStopVideo;
    adapt->SetPortAttribute = CHIPSSetPortAttribute;
    adapt->GetPortAttribute = CHIPSGetPortAttribute;
    adapt->QueryBestSize = CHIPSQueryBestSize;
    adapt->PutImage = CHIPSPutImage;
    adapt->QueryImageAttributes = CHIPSQueryImageAttributes;

    pPriv->colorKey = cPtr->videoKey;
    pPriv->videoStatus = 0;
    pPriv->manualDoubleBuffer = FALSE;
    pPriv->currentBuffer	= 0;

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

    cPtr->adaptor = adapt;

    xvColorKey   = MAKE_ATOM("XV_COLORKEY");

    CHIPSResetVideo(pScrn);

    return adapt;
}


static void 
CHIPSStopVideo(ScrnInfoPtr pScrn, pointer data, Bool shadow)
{
  CHIPSPortPrivPtr pPriv = (CHIPSPortPrivPtr)data;
  CHIPSPtr cPtr = CHIPSPTR(pScrn);
  unsigned char mr3c, tmp;

  REGION_EMPTY(pScrn->pScreen, &pPriv->clip);   
#ifdef HAVE_XAA_H
  if (cPtr->Flags & ChipsAccelSupport) 
      CHIPSHiQVSync(pScrn);
#endif
  if(shadow) {
     if(pPriv->videoStatus & CLIENT_VIDEO_ON) {
	mr3c = cPtr->readMR(cPtr, 0x3C);
	cPtr->writeMR(cPtr, 0x3C, (mr3c & 0xFE));
	tmp = cPtr->readXR(cPtr, 0xD0);
	cPtr->writeXR(cPtr, 0xD0, (tmp & 0xf));
     }
     if(pPriv->linear) {
	xf86FreeOffscreenLinear(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; 
	cPtr->VideoTimerCallback = CHIPSVideoTimerCallback;
     }
  }
}

static int 
CHIPSSetPortAttribute(
  ScrnInfoPtr pScrn, 
  Atom attribute,
  INT32 value, 
  pointer data
){
  CHIPSPortPrivPtr pPriv = (CHIPSPortPrivPtr)data;
  CHIPSPtr cPtr = CHIPSPTR(pScrn);

#ifdef HAVE_XAA_H
  if (cPtr->Flags & ChipsAccelSupport) 
      CHIPSHiQVSync(pScrn);
#endif
  if(attribute == xvColorKey) {
	int red, green, blue;
	pPriv->colorKey = value;
	switch (pScrn->depth) {
	case 8:
	    cPtr->writeMR(cPtr, 0x3D, 0x00);
	    cPtr->writeMR(cPtr, 0x3E, 0x00);
	    cPtr->writeMR(cPtr, 0x3F, (pPriv->colorKey & 0xFF));
	    break;
	default:
	    red = (pPriv->colorKey & pScrn->mask.red) >> pScrn->offset.red;
	    green = (pPriv->colorKey & pScrn->mask.green) >> pScrn->offset.green;
	    blue = (pPriv->colorKey & pScrn->mask.blue) >> pScrn->offset.blue;
	    switch (pScrn->depth) {
	    case 15:
		cPtr->writeMR(cPtr, 0x3D, (red << 3));
		cPtr->writeMR(cPtr, 0x3E, (green << 3));
		cPtr->writeMR(cPtr, 0x3F, (blue << 3));
		break;
	    case 16:
		cPtr->writeMR(cPtr, 0x3D, (red << 3));
		cPtr->writeMR(cPtr, 0x3E, (green << 2));
		cPtr->writeMR(cPtr, 0x3F, (blue << 3));
		break;
	    case 24:
		cPtr->writeMR(cPtr, 0x3D, red);
		cPtr->writeMR(cPtr, 0x3E, green);
		cPtr->writeMR(cPtr, 0x3F, blue);
		break;
	    }    
	}    
	REGION_EMPTY(pScrn->pScreen, &pPriv->clip);   
  } else return BadMatch;

  return Success;
}

static int 
CHIPSGetPortAttribute(
  ScrnInfoPtr pScrn, 
  Atom attribute,
  INT32 *value, 
  pointer data
){
  CHIPSPortPrivPtr pPriv = (CHIPSPortPrivPtr)data;

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

  return Success;
}

static void 
CHIPSQueryBestSize(
  ScrnInfoPtr pScrn, 
  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; 

  if(*p_w > 16384) *p_w = 16384;
}


static void
CHIPSCopyData(
  unsigned char *src,
  unsigned char *dst,
  int srcPitch,
  int dstPitch,
  int h,
  int w
){
    w <<= 1;
    while(h--) {
	memcpy(dst, src, w);
	src += srcPitch;
	dst += dstPitch;
    }
}

static void
CHIPSCopyMungedData(
   unsigned char *src1,
   unsigned char *src2,
   unsigned char *src3,
   unsigned char *dst1,
   int srcPitch,
   int srcPitch2,
   int dstPitch,
   int h,
   int w
){
   CARD32 *dst = (CARD32*)dst1;
   int i, j;

   dstPitch >>= 2;
   w >>= 1;

   for(j = 0; j < h; j++) {
	for(i = 0; i < w; i++) {
	    dst[i] = src1[i << 1] | (src1[(i << 1) + 1] << 16) |
		     (src3[i] << 8) | (src2[i] << 24);
	}
	dst += dstPitch;
	src1 += srcPitch;
	if(j & 1) {
	    src2 += srcPitch2;
	    src3 += srcPitch2;
	}
   }
}

static FBLinearPtr
CHIPSAllocateMemory(
   ScrnInfoPtr pScrn,
   FBLinearPtr linear,
   int size
){
   ScreenPtr pScreen;
   FBLinearPtr new_linear;

   if(linear) {
	if(linear->size >= size) 
	   return linear;
        
        if(xf86ResizeOffscreenLinear(linear, size))
	   return linear;

	xf86FreeOffscreenLinear(linear);
   }

   pScreen = xf86ScrnToScreen(pScrn);

   new_linear = xf86AllocateOffscreenLinear(pScreen, size, 8, 
   						NULL, NULL, NULL);

   if(!new_linear) {
	int max_size;

	xf86QueryLargestOffscreenLinear(pScreen, &max_size, 8, 
						PRIORITY_EXTREME);
	
	if(max_size < size)
	   return NULL;

	xf86PurgeUnlockedOffscreenAreas(pScreen);
	new_linear = xf86AllocateOffscreenLinear(pScreen, size, 8, 
						NULL, NULL, NULL);
   }
   
   return new_linear;
}

static int
CHIPSSetCurrentPlaybackBuffer(CHIPSPtr cPtr, int n)
{
  
    CARD8 mr20;
    mr20 = cPtr->readMR(cPtr, 0x20);
    mr20 &= ~0x1B;
    if (!n) mr20 |= 0x10;
    cPtr->writeMR(cPtr, 0x22, mr20);
    return n;
}

static int
CHIPSWaitGetNextFrame(CHIPSPtr cPtr)
{
    volatile CARD8 mr20;
    volatile CARD8 mr21;
    
    mr20 = cPtr->readMR(cPtr, 0x20);
    while (1) {
      mr21 = cPtr->readMR(cPtr, 0x21);
      if (!(mr20 & (1 << 5)) || !(mr21 & 1))  
	break;
    }
    mr20 &= ~0x4;
    mr20 = cPtr->readMR(cPtr, 0x20);
    return (mr21 & 2)? 0 : 1;
}

static void
CHIPSDisplayVideo(
    ScrnInfoPtr pScrn,
    int id,
    int offset,
    short width, short height,
    int pitch, 
    int x1, int y1, int x2, int y2,
    BoxPtr dstBox,
    short src_w, short src_h,
    short drw_w, short drw_h,
    Bool triggerBufSwitch
){
    CHIPSPtr cPtr = CHIPSPTR(pScrn);
    CHIPSPortPrivPtr pPriv = GET_PORT_PRIVATE(pScrn);
    DisplayModePtr mode = pScrn->currentMode;
    unsigned char tmp, m1f, m1e;
    int buffer = pPriv->currentBuffer;
    Bool dblscan = (pScrn->currentMode->Flags & V_DBLSCAN) == V_DBLSCAN;
    int val;

#ifdef HAVE_XAA_H    
    if (cPtr->Flags & ChipsAccelSupport) 
	CHIPSHiQVSync(pScrn);
#endif
    tmp = cPtr->readXR(cPtr, 0xD0);
    cPtr->writeXR(cPtr, 0xD0, (tmp | 0x10));
    
    m1e = cPtr->readMR(cPtr, 0x1E);
    m1e &= 0xE0;		/* Set Zoom and Direction */
    if ((!(cPtr->PanelType & ChipsLCD)) && (mode->Flags & V_INTERLACE)) 
	m1e |= 0x10;

    m1f = cPtr->readMR(cPtr, 0x1F);
    m1f = (m1f & 0x14); /* Mask reserved bits, unset interpolation */
    switch(id) {
    case 0x35315652:		/* RGB15 */
	m1f |= 0x09;
	break;
    case 0x36315652:		/* RGB16 */
	m1f |= 0x08;
	break;
    case FOURCC_YV12:		/* YV12 */
      /* m1f |= 0x03 */
	m1f |= 0x00; 
	break;
    case FOURCC_YUY2:		/* YUY2 */
    default:
	m1f |= 0x00;		/* Do nothing here */
	break;
    }  

    offset += (x1 >> 15) & ~0x01;
    /* Setup Pointer 1 */
    if (!buffer || pPriv->manualDoubleBuffer || !pPriv->doubleBuffer) {
        cPtr->writeMR(cPtr, 0x22, (offset & 0xF8));
	cPtr->writeMR(cPtr, 0x23, ((offset >> 8) & 0xFF));
	cPtr->writeMR(cPtr, 0x24, ((offset >> 16) & 0xFF));
    }
    
    /* Setup Pointer 2 */
    if ((buffer && !pPriv->manualDoubleBuffer) || !pPriv->doubleBuffer) {
        cPtr->writeMR(cPtr, 0x25, (offset & 0xF8));
	cPtr->writeMR(cPtr, 0x26, ((offset >> 8) & 0xFF));
	cPtr->writeMR(cPtr, 0x27, ((offset >> 16) & 0xFF));
    }

    tmp = cPtr->readMR(cPtr, 0x04);
    if (pPriv->doubleBuffer && !pPriv->manualDoubleBuffer && triggerBufSwitch)
      tmp |= 0x18;
    cPtr->writeMR(cPtr, 0x04, tmp);

    tmp = cPtr->readMR(cPtr, 0x20);
    tmp &= 0xC3;

    if (pPriv->doubleBuffer && !pPriv->manualDoubleBuffer && triggerBufSwitch) 
	tmp |= ((1 << 2  | 1 << 5) | ((buffer) ? (1 << 4) : 0));
    cPtr->writeMR(cPtr, 0x20, tmp);

    cPtr->writeMR(cPtr, 0x28, ((width >> 2) - 1)); /* Width */ 
    cPtr->writeMR(cPtr, 0x34, ((width >> 2) - 1));

    /* Left Edge of Overlay */
    cPtr->writeMR(cPtr, 0x2A, ((cPtr->OverlaySkewX + dstBox->x1) & 0xFF));
    tmp = cPtr->readMR(cPtr, 0x2B);
    tmp = (tmp & 0xF8) + (((cPtr->OverlaySkewX + dstBox->x1) >> 8) & 0x07);
    cPtr->writeMR(cPtr, 0x2B, tmp);
    /* Right Edge of Overlay */
    cPtr->writeMR(cPtr, 0x2C, ((cPtr->OverlaySkewX + dstBox->x2 -1) 
				& 0xFF));
    tmp = cPtr->readMR(cPtr, 0x2D);
    tmp = (tmp & 0xF8) + (((cPtr->OverlaySkewX + dstBox->x2 - 1) >> 8) & 0x07);
    cPtr->writeMR(cPtr, 0x2D, tmp);
    /* Top Edge of Overlay */
    val = cPtr->OverlaySkewY + (dstBox->y1 << (dblscan ? 1 : 0));
    cPtr->writeMR(cPtr, 0x2E, ((val) & 0xFF));
    tmp = cPtr->readMR(cPtr, 0x2F);
    tmp = (tmp & 0xF8) + (((val) >> 8) & 0x07);
    cPtr->writeMR(cPtr, 0x2F, tmp);
    /* Bottom Edge of Overlay*/
    val = cPtr->OverlaySkewY + (dstBox->y2 << (dblscan ? 1 : 0));
    cPtr->writeMR(cPtr, 0x30, ((val - 1) & 0xFF));
    tmp = cPtr->readMR(cPtr, 0x31);
    tmp = (tmp & 0xF8) + (((val - 1) >> 8) & 0x07);
    cPtr->writeMR(cPtr, 0x31, tmp);

    /* Horizontal Zoom */
    if (drw_w > src_w) {
        m1f = m1f | 0x20; /* set H-interpolation */
	m1e = m1e | 0x04;
	tmp = cPtr->VideoZoomMax * src_w / drw_w;
	cPtr->writeMR(cPtr, 0x32, tmp);
    }

    /* Vertical Zoom */
    if (drw_h > src_h || dblscan) {
        m1f = m1f | 0x80; /* set V-interpolation */
	m1e = m1e | 0x08;
	if (dblscan) 
	    tmp = cPtr->VideoZoomMax >> 1;
	if (drw_h > src_h)
           tmp = 256 * src_h / drw_h;
       cPtr->writeMR(cPtr, 0x33, tmp & 0xFC);
    }
    cPtr->writeMR(cPtr, 0x1F, m1f); 
    cPtr->writeMR(cPtr, 0x1E, m1e);

    tmp = cPtr->readMR(cPtr, 0x3C);
    cPtr->writeMR(cPtr, 0x3C, (tmp | 0x7));
#ifdef HAVE_XAA_H    
    if (cPtr->Flags & ChipsAccelSupport) 
	CHIPSHiQVSync(pScrn);
#endif
}

static int 
CHIPSPutImage( 
  ScrnInfoPtr pScrn, 
  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,
  DrawablePtr pDraw
){
   CHIPSPortPrivPtr pPriv = (CHIPSPortPrivPtr)data;
   CHIPSPtr cPtr = CHIPSPTR(pScrn);
   INT32 x1, x2, y1, y2;
   unsigned char *dst_start;
   int new_size, offset, offset2 = 0, offset3 = 0;
   int srcPitch, srcPitch2 = 0, dstPitch;
   int top, left, npixels, nlines, bpp;
   BoxRec dstBox;
   CARD32 tmp;

   if(drw_w > 16384) drw_w = 16384;

   /* 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;

   if (!xf86XVClipVideoHelper(&dstBox, &x1, &x2, &y1, &y2,
			      clipBoxes, width, height))
	return Success;

   dstBox.x1 -= pScrn->frameX0 & cPtr->viewportMask;
   dstBox.x2 -= pScrn->frameX0 & cPtr->viewportMask;
   dstBox.y1 -= pScrn->frameY0;
   dstBox.y2 -= pScrn->frameY0;

   bpp = pScrn->bitsPerPixel >> 3;

   dstPitch = ((width << 1) + 15) & ~15;
   new_size = ((dstPitch * height) + bpp - 1) / bpp;

   pPriv->doubleBuffer = (pScrn->currentMode->Flags & V_DBLSCAN) != V_DBLSCAN;

   if (pPriv->doubleBuffer)
       new_size <<= 1; 

   switch(id) {
   case FOURCC_YV12:		/* YV12 */
	srcPitch = (width + 3) & ~3;
	offset2 = srcPitch * height;
	srcPitch2 = ((width >> 1) + 3) & ~3;
	offset3 = (srcPitch2 * (height >> 1)) + offset2;
	break;
   default:			/* RGB15, RGB16, YUY2 */
	srcPitch = (width << 1);
	break;
   }  

   if(!(pPriv->linear = CHIPSAllocateMemory(pScrn, pPriv->linear, new_size))) {
       if (pPriv->doubleBuffer
	   && (pPriv->linear = CHIPSAllocateMemory(pScrn, pPriv->linear, 
					      new_size >> 1))) {
         new_size >>= 1;
	 pPriv->doubleBuffer = FALSE;
   } else 
	return BadAlloc;
   }

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

   offset = pPriv->linear->offset * bpp;
   if (!pPriv->manualDoubleBuffer)
     pPriv->currentBuffer = CHIPSWaitGetNextFrame(cPtr);
   if(pPriv->doubleBuffer && pPriv->currentBuffer) 
	offset += (new_size * bpp) >> 1;

   dst_start = cPtr->FbBase + offset + left + (top * dstPitch);

   switch(id) {
   case FOURCC_YV12:		/* YV12 */
        top &= ~1;
	tmp = ((top >> 1) * srcPitch2) + (left >> 2);
	offset2 += tmp;
	offset3 += tmp; 
	nlines = ((((y2 + 0xffff) >> 16) + 1) & ~1) - top;
	CHIPSCopyMungedData(buf + (top * srcPitch) + (left >> 1), 
			  buf + offset2, buf + offset3, dst_start,
			  srcPitch, srcPitch2, dstPitch, nlines, npixels);
	break;
   default:			/* RGB15, RGB16, YUY2 */
	buf += (top * srcPitch) + left;
	nlines = ((y2 + 0xffff) >> 16) - top;
	CHIPSCopyData(buf, dst_start, srcPitch, dstPitch, nlines, npixels);
	break;
   }  

   /* update cliplist */
   if(!REGION_EQUAL(pScrn->pScreen, &pPriv->clip, clipBoxes)) {
	REGION_COPY(pScrn->pScreen, &pPriv->clip, clipBoxes);
        xf86XVFillKeyHelper(pScrn->pScreen, pPriv->colorKey, clipBoxes);
   }

   offset += top * dstPitch;   
   CHIPSDisplayVideo(pScrn, id, offset, width, height, dstPitch,
	     x1, y1, x2, y2, &dstBox, src_w, src_h, drw_w, drw_h, TRUE);

   pPriv->videoStatus = CLIENT_VIDEO_ON;
   
   if (pPriv->manualDoubleBuffer)
     pPriv->currentBuffer ^= 1;   

   return Success;
}

static int 
CHIPSQueryImageAttributes(
  ScrnInfoPtr pScrn, 
  int id, 
  unsigned short *w, unsigned short *h, 
  int *pitches, int *offsets
){
    int size, tmp;

    if(*w > 1024) *w = 1024;
    if(*h > 1024) *h = 1024;

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

    switch(id) {
    case FOURCC_YV12:		/* YV12 */
	*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;
    default:			/* RGB15, RGB16, YUY2 */
	size = *w << 1;
	if(pitches) pitches[0] = size;
	size *= *h;
	break;
    }

    return size;
}


static void
CHIPSVideoTimerCallback(ScrnInfoPtr pScrn, Time time)
{
    CHIPSPtr    cPtr = CHIPSPTR(pScrn);
    CHIPSPortPrivPtr pPriv = GET_PORT_PRIVATE(pScrn);
    unsigned char mr3c;

    if(pPriv->videoStatus & TIMER_MASK) {
	if(pPriv->videoStatus & OFF_TIMER) {
	    if(pPriv->offTime < time) {
#ifdef HAVE_XAA_H    
		if (cPtr->Flags & ChipsAccelSupport) 
		    CHIPSHiQVSync(pScrn);
#endif
		mr3c = cPtr->readMR(cPtr, 0x3C);
		cPtr->writeMR(cPtr, 0x3C, (mr3c & 0xFE));
		pPriv->videoStatus = FREE_TIMER;
		pPriv->freeTime = currentTime.milliseconds + FREE_DELAY;
	    }
	} else {  /* FREE_TIMER */
	    if(pPriv->freeTime < time) {
		if(pPriv->linear) {
		   xf86FreeOffscreenLinear(pPriv->linear);
		   pPriv->linear = NULL;
		}
		pPriv->videoStatus = 0;
	        cPtr->VideoTimerCallback = NULL;
	    }
        }
    } else  /* shouldn't get here */
	cPtr->VideoTimerCallback = NULL;
}


/****************** Offscreen stuff ***************/

typedef struct {
  FBLinearPtr linear;
  Bool isOn;
} OffscreenPrivRec, * OffscreenPrivPtr;

static int 
CHIPSAllocateSurface(
    ScrnInfoPtr pScrn,
    int id,
    unsigned short w, 	
    unsigned short h,
    XF86SurfacePtr surface
){
    FBLinearPtr linear;
    int pitch, size, bpp;
    OffscreenPrivPtr pPriv;

    if((w > 1024) || (h > 1024))
	return BadAlloc;

    w = (w + 1) & ~1;
    pitch = ((w << 1) + 15) & ~15;
    bpp = pScrn->bitsPerPixel >> 3;
    size = ((pitch * h) + bpp - 1) / bpp;

    if(!(linear = CHIPSAllocateMemory(pScrn, NULL, size)))
	return BadAlloc;

    surface->width = w;
    surface->height = h;

    if(!(surface->pitches = malloc(sizeof(int)))) {
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }
    if(!(surface->offsets = malloc(sizeof(int)))) {
	free(surface->pitches);
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }
    if(!(pPriv = malloc(sizeof(OffscreenPrivRec)))) {
	free(surface->pitches);
	free(surface->offsets);
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }

    pPriv->linear = linear;
    pPriv->isOn = FALSE;

    surface->pScrn = pScrn;
    surface->id = id;   
    surface->pitches[0] = pitch;
    surface->offsets[0] = linear->offset * bpp;
    surface->devPrivate.ptr = (pointer)pPriv;

    return Success;
}

static int 
CHIPSStopSurface(
    XF86SurfacePtr surface
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;

    if(pPriv->isOn) {
	CHIPSPtr cPtr = CHIPSPTR(surface->pScrn);
	unsigned char mr3c, tmp;
	tmp = cPtr->readXR(cPtr, 0xD0);
	cPtr->writeXR(cPtr, 0xD0, (tmp & 0xf));
	mr3c = cPtr->readMR(cPtr, 0x3C);
	cPtr->writeMR(cPtr, 0x3C, (mr3c & 0xFE));
	pPriv->isOn = FALSE;
    }

    return Success;
}


static int 
CHIPSFreeSurface(
    XF86SurfacePtr surface
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;

    if(pPriv->isOn)
	CHIPSStopSurface(surface);
    xf86FreeOffscreenLinear(pPriv->linear);
    free(surface->pitches);
    free(surface->offsets);
    free(surface->devPrivate.ptr);

    return Success;
}

static int
CHIPSGetSurfaceAttribute(
    ScrnInfoPtr pScrn,
    Atom attribute,
    INT32 *value
){
    return CHIPSGetPortAttribute(pScrn, attribute, value, 
			(pointer)(GET_PORT_PRIVATE(pScrn)));
}

static int
CHIPSSetSurfaceAttribute(
    ScrnInfoPtr pScrn,
    Atom attribute,
    INT32 value
){
    return CHIPSSetPortAttribute(pScrn, attribute, value, 
			(pointer)(GET_PORT_PRIVATE(pScrn)));
}


static int 
CHIPSDisplaySurface(
    XF86SurfacePtr surface,
    short src_x, short src_y, 
    short drw_x, short drw_y,
    short src_w, short src_h, 
    short drw_w, short drw_h,
    RegionPtr clipBoxes
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;
    ScrnInfoPtr pScrn = surface->pScrn;
    CHIPSPtr cPtr = CHIPSPTR(pScrn);
    CHIPSPortPrivPtr portPriv = GET_PORT_PRIVATE(pScrn);
    INT32 x1, y1, x2, y2;
    BoxRec dstBox;

    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;

    if(!xf86XVClipVideoHelper(&dstBox, &x1, &x2, &y1, &y2, clipBoxes, 
			      surface->width, surface->height))
	return Success;

    dstBox.x1 -= pScrn->frameX0;
    dstBox.x2 -= pScrn->frameX0;
    dstBox.y1 -= pScrn->frameY0;
    dstBox.y2 -= pScrn->frameY0;

    if (portPriv->doubleBuffer)
      portPriv->currentBuffer = CHIPSSetCurrentPlaybackBuffer(cPtr,0);
    else 
      portPriv->currentBuffer = 0;

    CHIPSDisplayVideo(pScrn, surface->id, surface->offsets[0], 
	     surface->width, surface->height, surface->pitches[0],
	     x1, y1, x2, y2, &dstBox, src_w, src_h, drw_w, drw_h, FALSE);
    xf86XVFillKeyHelper(pScrn->pScreen, portPriv->colorKey, clipBoxes);

    pPriv->isOn = TRUE;
    if(portPriv->videoStatus & CLIENT_VIDEO_ON) {
	REGION_EMPTY(pScrn->pScreen, &portPriv->clip);   
	UpdateCurrentTime();
	portPriv->videoStatus = FREE_TIMER;
	portPriv->freeTime = currentTime.milliseconds + FREE_DELAY;
	cPtr->VideoTimerCallback = CHIPSVideoTimerCallback;
    }

    return Success;
}


static void 
CHIPSInitOffscreenImages(ScreenPtr pScreen)
{
    XF86OffscreenImagePtr offscreenImages;

    /* need to free this someplace */
    if(!(offscreenImages = malloc(sizeof(XF86OffscreenImageRec))))
	return;

    offscreenImages[0].image = &Images[0];
    offscreenImages[0].flags = VIDEO_OVERLAID_IMAGES | 
			       VIDEO_CLIP_TO_VIEWPORT;
    offscreenImages[0].alloc_surface = CHIPSAllocateSurface;
    offscreenImages[0].free_surface = CHIPSFreeSurface;
    offscreenImages[0].display = CHIPSDisplaySurface;
    offscreenImages[0].stop = CHIPSStopSurface;
    offscreenImages[0].setAttribute = CHIPSSetSurfaceAttribute;
    offscreenImages[0].getAttribute = CHIPSGetSurfaceAttribute;
    offscreenImages[0].max_width = 1024;
    offscreenImages[0].max_height = 1024;
    offscreenImages[0].num_attributes = NUM_ATTRIBUTES;
    offscreenImages[0].attributes = Attributes;
    
    xf86XVRegisterOffscreenImages(pScreen, offscreenImages, 1);
}