Initial revision

1 files changed, 1196 insertions, 0 deletions

diff --git a/Xext/xvmain.c b/Xext/xvmain.c
new file mode 100644
index 000000000..c6c10e544
--- /dev/null
+++ b/Xext/xvmain.c
@@ -0,0 +1,1196 @@
+/***********************************************************
+Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts,
+and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the names of Digital or MIT not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $XFree86: xc/programs/Xserver/Xext/xvmain.c,v 1.13 2001/08/23 13:01:36 alanh Exp $ */
+
+/*
+** File: 
+**
+**   xvmain.c --- Xv server extension main device independent module.
+**   
+** Author: 
+**
+**   David Carver (Digital Workstation Engineering/Project Athena)
+**
+** Revisions:
+**
+**   04.09.91 Carver
+**     - change: stop video always generates an event even when video
+**       wasn't active
+**
+**   29.08.91 Carver
+**     - change: unrealizing windows no longer preempts video
+**
+**   11.06.91 Carver
+**     - changed SetPortControl to SetPortAttribute
+**     - changed GetPortControl to GetPortAttribute
+**     - changed QueryBestSize
+**
+**   28.05.91 Carver
+**     - fixed Put and Get requests to not preempt operations to same drawable
+**
+**   15.05.91 Carver
+**     - version 2.0 upgrade
+**
+**   19.03.91 Carver
+**     - fixed Put and Get requests to honor grabbed ports.
+**     - fixed Video requests to update di structure with new drawable, and
+**       client after calling ddx.
+**
+**   24.01.91 Carver
+**     - version 1.4 upgrade
+**       
+** Notes:
+**
+**   Port structures reference client structures in a two different
+**   ways: when grabs, or video is active.  Each reference is encoded
+**   as fake client resources and thus when the client is goes away so
+**   does the reference (it is zeroed).  No other action is taken, so
+**   video doesn't necessarily stop.  It probably will as a result of
+**   other resources going away, but if a client starts video using
+**   none of its own resources, then the video will continue to play
+**   after the client disappears.
+**
+**
+*/
+
+#include "X.h"
+#include "Xproto.h"
+#include "misc.h"
+#include "os.h"
+#include "scrnintstr.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "gc.h"
+#include "extnsionst.h"
+#include "dixstruct.h"
+#include "resource.h"
+#include "opaque.h"
+#include "input.h"
+
+#define GLOBAL
+
+#include "Xv.h"
+#include "Xvproto.h"
+#include "xvdix.h"
+
+#ifdef EXTMODULE
+#include "xf86_ansic.h"
+#endif
+
+#ifdef PANORAMIX
+#include "panoramiX.h"
+#include "panoramiXsrv.h"
+extern void XineramifyXv(void);
+#endif
+
+int  XvScreenIndex = -1;
+unsigned long XvExtensionGeneration = 0;
+unsigned long XvScreenGeneration = 0;
+unsigned long XvResourceGeneration = 0;
+
+int XvReqCode;
+int XvEventBase;
+int XvErrorBase;
+
+unsigned long XvRTPort;
+unsigned long XvRTEncoding;
+unsigned long XvRTGrab;
+unsigned long XvRTVideoNotify;
+unsigned long XvRTVideoNotifyList;
+unsigned long XvRTPortNotify;
+
+
+
+/* EXTERNAL */
+
+extern XID clientErrorValue;
+
+static void WriteSwappedVideoNotifyEvent(xvEvent *, xvEvent *);
+static void WriteSwappedPortNotifyEvent(xvEvent *, xvEvent *);
+static Bool CreateResourceTypes(void);
+
+static Bool XvCloseScreen(int, ScreenPtr);
+static Bool XvDestroyPixmap(PixmapPtr);
+static Bool XvDestroyWindow(WindowPtr);
+static void XvResetProc(ExtensionEntry*);
+static int XvdiDestroyGrab(pointer, XID);
+static int XvdiDestroyEncoding(pointer, XID);
+static int XvdiDestroyVideoNotify(pointer, XID);
+static int XvdiDestroyPortNotify(pointer, XID);
+static int XvdiDestroyVideoNotifyList(pointer, XID);
+static int XvdiDestroyPort(pointer, XID);
+static int XvdiSendVideoNotify(XvPortPtr, DrawablePtr, int);
+
+
+
+
+/*
+** XvExtensionInit
+**
+**
+*/
+
+void 
+XvExtensionInit()
+{
+  ExtensionEntry *extEntry;
+
+  /* LOOK TO SEE IF ANY SCREENS WERE INITIALIZED; IF NOT THEN
+     INIT GLOBAL VARIABLES SO THE EXTENSION CAN FUNCTION */
+  if (XvScreenGeneration != serverGeneration)
+    {
+      if (!CreateResourceTypes())
+	{
+	  ErrorF("XvExtensionInit: Unable to allocate resource types\n");
+	  return;
+	}
+      XvScreenIndex = AllocateScreenPrivateIndex ();
+      if (XvScreenIndex < 0)
+	{
+	  ErrorF("XvExtensionInit: Unable to allocate screen private index\n");
+	  return;
+	}
+#ifdef PANORAMIX
+        XineramaRegisterConnectionBlockCallback(XineramifyXv);
+#endif
+      XvScreenGeneration = serverGeneration;
+    }
+
+  if (XvExtensionGeneration != serverGeneration)
+    {
+      XvExtensionGeneration = serverGeneration;
+
+      extEntry = AddExtension(XvName, XvNumEvents, XvNumErrors, 
+			      ProcXvDispatch, SProcXvDispatch,
+			      XvResetProc, StandardMinorOpcode);
+      if (!extEntry) 
+	{
+	  FatalError("XvExtensionInit: AddExtensions failed\n");
+	}
+
+      XvReqCode = extEntry->base;
+      XvEventBase = extEntry->eventBase;
+      XvErrorBase = extEntry->errorBase;
+
+      EventSwapVector[XvEventBase+XvVideoNotify] = 
+	(EventSwapPtr)WriteSwappedVideoNotifyEvent;
+      EventSwapVector[XvEventBase+XvPortNotify] = 
+	(EventSwapPtr)WriteSwappedPortNotifyEvent;
+
+      (void)MakeAtom(XvName, strlen(XvName), xTrue);
+
+    }
+}
+
+static Bool
+CreateResourceTypes()
+
+{
+  
+  if (XvResourceGeneration == serverGeneration) return TRUE;
+
+  XvResourceGeneration = serverGeneration;
+
+  if (!(XvRTPort = CreateNewResourceType(XvdiDestroyPort)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate port resource.\n");
+      return FALSE;
+    }
+  
+  if (!(XvRTGrab = CreateNewResourceType(XvdiDestroyGrab)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate grab resource.\n");
+      return FALSE;
+    }
+  
+  if (!(XvRTEncoding = CreateNewResourceType(XvdiDestroyEncoding)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate encoding resource.\n");
+      return FALSE;
+    }
+  
+  if (!(XvRTVideoNotify = CreateNewResourceType(XvdiDestroyVideoNotify)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate video notify resource.\n");
+      return FALSE;
+    }
+  
+  if (!(XvRTVideoNotifyList = CreateNewResourceType(XvdiDestroyVideoNotifyList)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate video notify list resource.\n");
+      return FALSE;
+    }
+
+  if (!(XvRTPortNotify = CreateNewResourceType(XvdiDestroyPortNotify)))
+    {
+      ErrorF("CreateResourceTypes: failed to allocate port notify resource.\n");
+      return FALSE;
+    }
+
+  return TRUE;
+
+}
+
+int
+XvScreenInit(ScreenPtr pScreen)
+{
+  XvScreenPtr pxvs;
+
+  if (XvScreenGeneration != serverGeneration)
+    {
+      if (!CreateResourceTypes())
+	{
+	  ErrorF("XvScreenInit: Unable to allocate resource types\n");
+	  return BadAlloc;
+	}
+      XvScreenIndex = AllocateScreenPrivateIndex ();
+      if (XvScreenIndex < 0)
+	{
+	  ErrorF("XvScreenInit: Unable to allocate screen private index\n");
+	  return BadAlloc;
+	}
+#ifdef PANORAMIX
+        XineramaRegisterConnectionBlockCallback(XineramifyXv);
+#endif
+      XvScreenGeneration = serverGeneration; 
+    }
+
+  if (pScreen->devPrivates[XvScreenIndex].ptr)
+    {
+      ErrorF("XvScreenInit: screen devPrivates ptr non-NULL before init\n");
+    }
+
+  /* ALLOCATE SCREEN PRIVATE RECORD */
+  
+  pxvs = (XvScreenPtr) xalloc (sizeof (XvScreenRec));
+  if (!pxvs)
+    {
+      ErrorF("XvScreenInit: Unable to allocate screen private structure\n");
+      return BadAlloc;
+    }
+
+  pScreen->devPrivates[XvScreenIndex].ptr = (pointer)pxvs;
+
+  
+  pxvs->DestroyPixmap = pScreen->DestroyPixmap;
+  pxvs->DestroyWindow = pScreen->DestroyWindow;
+  pxvs->CloseScreen = pScreen->CloseScreen;
+  
+  pScreen->DestroyPixmap = XvDestroyPixmap;
+  pScreen->DestroyWindow = XvDestroyWindow;
+  pScreen->CloseScreen = XvCloseScreen;
+
+  return Success;
+}
+
+static Bool
+XvCloseScreen(
+  int ii,
+  ScreenPtr pScreen
+){
+
+  XvScreenPtr pxvs;
+
+  pxvs = (XvScreenPtr) pScreen->devPrivates[XvScreenIndex].ptr;
+
+  pScreen->DestroyPixmap = pxvs->DestroyPixmap;
+  pScreen->DestroyWindow = pxvs->DestroyWindow;
+  pScreen->CloseScreen = pxvs->CloseScreen;
+
+  (* pxvs->ddCloseScreen)(ii, pScreen); 
+
+  xfree(pxvs);
+
+  pScreen->devPrivates[XvScreenIndex].ptr = (pointer)NULL;
+
+  return (*pScreen->CloseScreen)(ii, pScreen);
+
+}
+
+static void
+XvResetProc(ExtensionEntry* extEntry)
+{
+}
+
+int
+XvGetScreenIndex()
+{
+  return XvScreenIndex;
+}
+
+unsigned long
+XvGetRTPort()
+{
+  return XvRTPort;
+}
+
+static Bool
+XvDestroyPixmap(PixmapPtr pPix)
+{
+  Bool status;
+  ScreenPtr pScreen;
+  XvScreenPtr pxvs;
+  XvAdaptorPtr pa;
+  int na;
+  XvPortPtr pp;
+  int np;
+
+  pScreen = pPix->drawable.pScreen;
+
+  SCREEN_PROLOGUE(pScreen, DestroyPixmap);
+
+  pxvs = (XvScreenPtr)pScreen->devPrivates[XvScreenIndex].ptr;
+
+  /* CHECK TO SEE IF THIS PORT IS IN USE */
+
+  pa = pxvs->pAdaptors;
+  na = pxvs->nAdaptors;
+  while (na--)
+    {
+      np = pa->nPorts;
+      pp = pa->pPorts;
+
+      while (np--)
+	{
+	  if (pp->pDraw == (DrawablePtr)pPix)
+	    {
+	      XvdiSendVideoNotify(pp, pp->pDraw, XvPreempted);
+
+	      (void)(* pp->pAdaptor->ddStopVideo)((ClientPtr)NULL, pp, 
+						  pp->pDraw);
+
+	      pp->pDraw = (DrawablePtr)NULL;
+	      pp->client = (ClientPtr)NULL;
+	      pp->time = currentTime;
+	    }
+	  pp++;
+	}
+      pa++;
+    }
+  
+  status = (* pScreen->DestroyPixmap)(pPix);
+
+  SCREEN_EPILOGUE(pScreen, DestroyPixmap, XvDestroyPixmap);
+
+  return status;
+
+}
+
+static Bool
+XvDestroyWindow(WindowPtr pWin)
+{
+  Bool status;
+  ScreenPtr pScreen;
+  XvScreenPtr pxvs;
+  XvAdaptorPtr pa;
+  int na;
+  XvPortPtr pp;
+  int np;
+
+  pScreen = pWin->drawable.pScreen;
+
+  SCREEN_PROLOGUE(pScreen, DestroyWindow);
+
+  pxvs = (XvScreenPtr)pScreen->devPrivates[XvScreenIndex].ptr;
+
+  /* CHECK TO SEE IF THIS PORT IS IN USE */
+
+  pa = pxvs->pAdaptors;
+  na = pxvs->nAdaptors;
+  while (na--)
+    {
+      np = pa->nPorts;
+      pp = pa->pPorts;
+
+      while (np--)
+	{
+	  if (pp->pDraw == (DrawablePtr)pWin)
+	    {
+	      XvdiSendVideoNotify(pp, pp->pDraw, XvPreempted);
+
+	      (void)(* pp->pAdaptor->ddStopVideo)((ClientPtr)NULL, pp, 
+						  pp->pDraw);
+
+	      pp->pDraw = (DrawablePtr)NULL;
+	      pp->client = (ClientPtr)NULL;
+	      pp->time = currentTime;
+	    }
+	  pp++;
+	}
+      pa++;
+    }
+
+  
+  status = (* pScreen->DestroyWindow)(pWin);
+
+  SCREEN_EPILOGUE(pScreen, DestroyWindow, XvDestroyWindow);
+
+  return status;
+
+}
+
+/* The XvdiVideoStopped procedure is a hook for the device dependent layer.
+   It provides a way for the dd layer to inform the di layer that video has
+   stopped in a port for reasons that the di layer had no control over; note
+   that it doesn't call back into the dd layer */
+
+int
+XvdiVideoStopped(XvPortPtr pPort, int reason)
+{
+  
+  /* IF PORT ISN'T ACTIVE THEN WE'RE DONE */
+
+  if (!pPort->pDraw) return Success;
+
+  XvdiSendVideoNotify(pPort, pPort->pDraw, reason);
+
+  pPort->pDraw = (DrawablePtr)NULL;
+  pPort->client = (ClientPtr)NULL;
+  pPort->time = currentTime;
+
+  return Success;
+
+}
+
+static int 
+XvdiDestroyPort(pointer pPort, XID id)
+{
+  return (* ((XvPortPtr)pPort)->pAdaptor->ddFreePort)(pPort);
+}
+
+static int
+XvdiDestroyGrab(pointer pGrab, XID id)
+{
+  ((XvGrabPtr)pGrab)->client = (ClientPtr)NULL;
+  return Success;
+}
+
+static int
+XvdiDestroyVideoNotify(pointer pn, XID id)
+{
+  /* JUST CLEAR OUT THE client POINTER FIELD */
+
+  ((XvVideoNotifyPtr)pn)->client = (ClientPtr)NULL;
+  return Success;
+}
+
+static int
+XvdiDestroyPortNotify(pointer pn, XID id)
+{
+  /* JUST CLEAR OUT THE client POINTER FIELD */
+
+  ((XvPortNotifyPtr)pn)->client = (ClientPtr)NULL;
+  return Success;
+}
+
+static int
+XvdiDestroyVideoNotifyList(pointer pn, XID id)
+{
+  XvVideoNotifyPtr npn,cpn;
+
+  /* ACTUALLY DESTROY THE NOTITY LIST */
+
+  cpn = (XvVideoNotifyPtr)pn;
+
+  while (cpn)
+    {
+      npn = cpn->next;
+      if (cpn->client) FreeResource(cpn->id, XvRTVideoNotify);
+      xfree(cpn);
+      cpn = npn;
+    }
+  return Success;
+}
+
+static int
+XvdiDestroyEncoding(pointer value, XID id)
+{
+  return Success;
+}
+
+static int
+XvdiSendVideoNotify(pPort, pDraw, reason)
+
+XvPortPtr pPort;
+DrawablePtr pDraw;
+int reason;
+
+{
+  xvEvent event;
+  XvVideoNotifyPtr pn;
+
+  pn = (XvVideoNotifyPtr)LookupIDByType(pDraw->id, XvRTVideoNotifyList);
+
+  while (pn) 
+    {
+      if (pn->client)
+	{
+	  event.u.u.type = XvEventBase + XvVideoNotify;
+	  event.u.u.sequenceNumber = pn->client->sequence;
+	  event.u.videoNotify.time = currentTime.milliseconds;
+	  event.u.videoNotify.drawable = pDraw->id;
+	  event.u.videoNotify.port = pPort->id;
+	  event.u.videoNotify.reason = reason;
+	  (void) TryClientEvents(pn->client, (xEventPtr)&event, 1, NoEventMask,
+				 NoEventMask, NullGrab);
+	}
+      pn = pn->next;
+    }
+
+  return Success;
+
+}
+
+
+int
+XvdiSendPortNotify(
+  XvPortPtr pPort,
+  Atom attribute,
+  INT32 value
+){
+  xvEvent event;
+  XvPortNotifyPtr pn;
+
+  pn = pPort->pNotify;
+
+  while (pn) 
+    {
+      if (pn->client)
+	{
+	  event.u.u.type = XvEventBase + XvPortNotify;
+	  event.u.u.sequenceNumber = pn->client->sequence;
+	  event.u.portNotify.time = currentTime.milliseconds;
+	  event.u.portNotify.port = pPort->id;
+	  event.u.portNotify.attribute = attribute;
+	  event.u.portNotify.value = value;
+	  (void) TryClientEvents(pn->client, (xEventPtr)&event, 1, NoEventMask,
+				 NoEventMask, NullGrab);
+	}
+      pn = pn->next;
+    }
+
+  return Success;
+
+}
+
+int
+XvdiPutVideo(   
+   ClientPtr client,
+   DrawablePtr pDraw,
+   XvPortPtr pPort,
+   GCPtr pGC,
+   INT16 vid_x, INT16 vid_y, 
+   CARD16 vid_w, CARD16 vid_h, 
+   INT16 drw_x, INT16 drw_y,
+   CARD16 drw_w, CARD16 drw_h
+){
+  int status;
+  DrawablePtr pOldDraw;
+
+  if(!drw_w || !drw_h || !vid_w || !vid_h)
+	return Success;
+
+  /* UPDATE TIME VARIABLES FOR USE IN EVENTS */
+
+  UpdateCurrentTime();
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if (pPort->grab.client && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  /* CHECK TO SEE IF PORT IS IN USE; IF SO THEN WE MUST DELIVER INTERRUPTED
+     EVENTS TO ANY CLIENTS WHO WANT THEM */
+
+  pOldDraw = pPort->pDraw;
+  if ((pOldDraw) && (pOldDraw != pDraw))
+    {
+      XvdiSendVideoNotify(pPort, pPort->pDraw, XvPreempted);
+    }
+
+  status = (* pPort->pAdaptor->ddPutVideo)(client, pDraw, pPort, pGC, 
+					   vid_x, vid_y, vid_w, vid_h, 
+					   drw_x, drw_y, drw_w, drw_h);
+
+  if ((pPort->pDraw) && (pOldDraw != pDraw))
+    {
+      pPort->client = client;
+      XvdiSendVideoNotify(pPort, pPort->pDraw, XvStarted);
+    }
+
+  pPort->time = currentTime;
+
+  return (Success);
+
+}
+
+int
+XvdiPutStill(   
+   ClientPtr client,
+   DrawablePtr pDraw,
+   XvPortPtr pPort,
+   GCPtr pGC,
+   INT16 vid_x, INT16 vid_y, 
+   CARD16 vid_w, CARD16 vid_h, 
+   INT16 drw_x, INT16 drw_y,
+   CARD16 drw_w, CARD16 drw_h
+){
+  int status;
+
+  if(!drw_w || !drw_h || !vid_w || !vid_h)
+	return Success; 
+
+  /* UPDATE TIME VARIABLES FOR USE IN EVENTS */
+
+  UpdateCurrentTime();
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if (pPort->grab.client && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  pPort->time = currentTime;
+
+  status = (* pPort->pAdaptor->ddPutStill)(client, pDraw, pPort, pGC, 
+					   vid_x, vid_y, vid_w, vid_h, 
+					   drw_x, drw_y, drw_w, drw_h);
+
+  return status;
+
+}
+
+int
+XvdiPutImage(   
+   ClientPtr client, 
+   DrawablePtr pDraw, 
+   XvPortPtr pPort, 
+   GCPtr pGC,
+   INT16 src_x, INT16 src_y, 
+   CARD16 src_w, CARD16 src_h, 
+   INT16 drw_x, INT16 drw_y,
+   CARD16 drw_w, CARD16 drw_h,
+   XvImagePtr image,
+   unsigned char* data,
+   Bool sync,
+   CARD16 width, CARD16 height
+){
+  if(!drw_w || !drw_h || !src_w || !src_h)
+	return Success;
+
+  /* UPDATE TIME VARIABLES FOR USE IN EVENTS */
+
+  UpdateCurrentTime();
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if (pPort->grab.client && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  pPort->time = currentTime;
+
+  return (* pPort->pAdaptor->ddPutImage)(client, pDraw, pPort, pGC, 
+					   src_x, src_y, src_w, src_h, 
+					   drw_x, drw_y, drw_w, drw_h,
+					   image, data, sync, width, height);
+}
+
+
+int
+XvdiGetVideo(
+   ClientPtr client,
+   DrawablePtr pDraw,
+   XvPortPtr pPort,
+   GCPtr pGC,
+   INT16 vid_x, INT16 vid_y, 
+   CARD16 vid_w, CARD16 vid_h, 
+   INT16 drw_x, INT16 drw_y,
+   CARD16 drw_w, CARD16 drw_h
+){
+  int status;
+  DrawablePtr pOldDraw;
+
+  if(!drw_w || !drw_h || !vid_w || !vid_h)
+	return Success; 
+
+  /* UPDATE TIME VARIABLES FOR USE IN EVENTS */
+
+  UpdateCurrentTime();
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if (pPort->grab.client && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  /* CHECK TO SEE IF PORT IS IN USE; IF SO THEN WE MUST DELIVER INTERRUPTED
+     EVENTS TO ANY CLIENTS WHO WANT THEM */
+
+  pOldDraw = pPort->pDraw;
+  if ((pOldDraw) && (pOldDraw != pDraw))
+    {
+      XvdiSendVideoNotify(pPort, pPort->pDraw, XvPreempted);
+    }
+
+  status = (* pPort->pAdaptor->ddGetVideo)(client, pDraw, pPort, pGC,
+					   vid_x, vid_y, vid_w, vid_h, 
+					   drw_x, drw_y, drw_w, drw_h);
+
+  if ((pPort->pDraw) && (pOldDraw != pDraw))
+    {
+      pPort->client = client;
+      XvdiSendVideoNotify(pPort, pPort->pDraw, XvStarted);
+    }
+
+  pPort->time = currentTime;
+
+  return (Success);
+
+}
+
+int
+XvdiGetStill(
+   ClientPtr client,
+   DrawablePtr pDraw,
+   XvPortPtr pPort,
+   GCPtr pGC,
+   INT16 vid_x, INT16 vid_y, 
+   CARD16 vid_w, CARD16 vid_h, 
+   INT16 drw_x, INT16 drw_y,
+   CARD16 drw_w, CARD16 drw_h
+){
+  int status;
+
+  if(!drw_w || !drw_h || !vid_w || !vid_h)
+	return Success;
+
+  /* UPDATE TIME VARIABLES FOR USE IN EVENTS */
+
+  UpdateCurrentTime();
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if (pPort->grab.client && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  status = (* pPort->pAdaptor->ddGetStill)(client, pDraw, pPort, pGC, 
+					   vid_x, vid_y, vid_w, vid_h, 
+					   drw_x, drw_y, drw_w, drw_h);
+
+  pPort->time = currentTime;
+
+  return status;
+
+}
+
+int
+XvdiGrabPort(
+   ClientPtr client,
+   XvPortPtr pPort,
+   Time ctime,
+   int *p_result
+){
+  unsigned long id;
+  TimeStamp time;
+
+  UpdateCurrentTime();
+  time = ClientTimeToServerTime(ctime);
+
+  if (pPort->grab.client && (client != pPort->grab.client))
+    {
+      *p_result = XvAlreadyGrabbed;
+      return Success;
+    }
+
+  if ((CompareTimeStamps(time, currentTime) == LATER) ||
+      (CompareTimeStamps(time, pPort->time) == EARLIER))
+    {
+      *p_result = XvInvalidTime;
+      return Success;
+    }
+
+  if (client == pPort->grab.client)
+    {
+      *p_result = Success;
+      return Success;
+    }
+
+  id = FakeClientID(client->index);
+
+  if (!AddResource(id, XvRTGrab, &pPort->grab))
+    {
+      return BadAlloc;
+    }
+
+  /* IF THERE IS ACTIVE VIDEO THEN STOP IT */
+
+  if ((pPort->pDraw) && (client != pPort->client))
+    {
+      XVCALL(diStopVideo)((ClientPtr)NULL, pPort, pPort->pDraw);
+    }
+
+  pPort->grab.client = client;
+  pPort->grab.id = id;
+
+  pPort->time = currentTime;
+
+  *p_result = Success;
+
+  return Success;
+
+}
+
+int
+XvdiUngrabPort(
+  ClientPtr client,
+  XvPortPtr pPort,
+  Time ctime
+){
+  TimeStamp time;
+
+  UpdateCurrentTime();
+  time = ClientTimeToServerTime(ctime);
+
+  if ((!pPort->grab.client) || (client != pPort->grab.client))
+    {
+      return Success;
+    }
+
+  if ((CompareTimeStamps(time, currentTime) == LATER) ||
+      (CompareTimeStamps(time, pPort->time) == EARLIER))
+    {
+      return Success;
+    }
+
+  /* FREE THE GRAB RESOURCE; AND SET THE GRAB CLIENT TO NULL */
+
+  FreeResource(pPort->grab.id, XvRTGrab);
+  pPort->grab.client = (ClientPtr)NULL;
+
+  pPort->time = currentTime;
+
+  return Success;
+
+}
+
+
+int
+XvdiSelectVideoNotify(
+  ClientPtr client,
+  DrawablePtr pDraw,
+  BOOL onoff
+){
+  XvVideoNotifyPtr pn,tpn,fpn;
+
+  /* FIND VideoNotify LIST */
+
+  pn = (XvVideoNotifyPtr)LookupIDByType(pDraw->id, XvRTVideoNotifyList);
+
+  /* IF ONE DONES'T EXIST AND NO MASK, THEN JUST RETURN */
+
+  if (!onoff && !pn) return Success;
+
+  /* IF ONE DOESN'T EXIST CREATE IT AND ADD A RESOURCE SO THAT THE LIST
+     WILL BE DELETED WHEN THE DRAWABLE IS DESTROYED */
+
+  if (!pn) 
+    {
+      if (!(tpn = (XvVideoNotifyPtr)xalloc(sizeof(XvVideoNotifyRec))))
+	return BadAlloc;
+      tpn->next = (XvVideoNotifyPtr)NULL;
+      if (!AddResource(pDraw->id, XvRTVideoNotifyList, tpn))
+	{
+	  xfree(tpn);
+	  return BadAlloc;
+	}
+    }
+  else
+    {
+      /* LOOK TO SEE IF ENTRY ALREADY EXISTS */
+
+      fpn = (XvVideoNotifyPtr)NULL;
+      tpn = pn;
+      while (tpn)
+	{
+	  if (tpn->client == client) 
+	    {
+	      if (!onoff) tpn->client = (ClientPtr)NULL;
+	      return Success;
+	    }
+	  if (!tpn->client) fpn = tpn; /* TAKE NOTE OF FREE ENTRY */
+	  tpn = tpn->next;
+	}
+
+      /* IF TUNNING OFF, THEN JUST RETURN */
+
+      if (!onoff) return Success;
+
+      /* IF ONE ISN'T FOUND THEN ALLOCATE ONE AND LINK IT INTO THE LIST */
+
+      if (fpn)
+	{
+	  tpn = fpn;
+	}
+      else
+	{
+	  if (!(tpn = (XvVideoNotifyPtr)xalloc(sizeof(XvVideoNotifyRec))))
+	    return BadAlloc;
+	  tpn->next = pn->next;
+	  pn->next = tpn;
+	}
+    }
+
+  /* INIT CLIENT PTR IN CASE WE CAN'T ADD RESOURCE */
+  /* ADD RESOURCE SO THAT IF CLIENT EXITS THE CLIENT PTR WILL BE CLEARED */
+
+  tpn->client = (ClientPtr)NULL;
+  tpn->id = FakeClientID(client->index);
+  AddResource(tpn->id, XvRTVideoNotify, tpn);
+
+  tpn->client = client;
+  return Success;
+
+}
+
+int
+XvdiSelectPortNotify(
+   ClientPtr client,
+   XvPortPtr pPort,
+   BOOL onoff
+){
+  XvPortNotifyPtr pn,tpn;
+
+  /* SEE IF CLIENT IS ALREADY IN LIST */
+
+  tpn = (XvPortNotifyPtr)NULL;
+  pn = pPort->pNotify;
+  while (pn)
+    {
+      if (!pn->client) tpn = pn; /* TAKE NOTE OF FREE ENTRY */
+      if (pn->client == client) break;
+      pn = pn->next;
+    }
+
+  /* IS THE CLIENT ALREADY ON THE LIST? */
+
+  if (pn)
+    {
+      /* REMOVE IT? */
+
+      if (!onoff)
+	{
+	  pn->client = (ClientPtr)NULL;
+	  FreeResource(pn->id, XvRTPortNotify);
+	}
+
+      return Success;
+    }
+
+  /* DIDN'T FIND IT; SO REUSE LIST ELEMENT IF ONE IS FREE OTHERWISE 
+     CREATE A NEW ONE AND ADD IT TO THE BEGINNING OF THE LIST */
+
+  if (!tpn)
+    {
+      if (!(tpn = (XvPortNotifyPtr)xalloc(sizeof(XvPortNotifyRec))))
+	return BadAlloc;
+      tpn->next = pPort->pNotify;
+      pPort->pNotify = tpn;
+    }
+
+  tpn->client = client;
+  tpn->id = FakeClientID(client->index);
+  AddResource(tpn->id, XvRTPortNotify, tpn);
+
+  return Success;
+
+}
+
+int
+XvdiStopVideo(
+  ClientPtr client,
+  XvPortPtr pPort,
+  DrawablePtr pDraw
+){
+  int status;
+
+  /* IF PORT ISN'T ACTIVE THEN WE'RE DONE */
+
+  if (!pPort->pDraw || (pPort->pDraw != pDraw)) 
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvStopped);
+      return Success;
+    }
+
+  /* CHECK FOR GRAB; IF THIS CLIENT DOESN'T HAVE THE PORT GRABBED THEN
+     INFORM CLIENT OF ITS FAILURE */
+
+  if ((client) && (pPort->grab.client) && (pPort->grab.client != client))
+    {
+      XvdiSendVideoNotify(pPort, pDraw, XvBusy);
+      return Success;
+    }
+
+  XvdiSendVideoNotify(pPort, pDraw, XvStopped);
+
+  status = (* pPort->pAdaptor->ddStopVideo)(client, pPort, pDraw);
+
+  pPort->pDraw = (DrawablePtr)NULL;
+  pPort->client = (ClientPtr)client;
+  pPort->time = currentTime;
+
+  return status;
+
+}
+
+int
+XvdiPreemptVideo(
+  ClientPtr client,
+  XvPortPtr pPort,
+  DrawablePtr pDraw
+){
+  int status;
+
+  /* IF PORT ISN'T ACTIVE THEN WE'RE DONE */
+
+  if (!pPort->pDraw || (pPort->pDraw != pDraw)) return Success;
+
+  XvdiSendVideoNotify(pPort, pPort->pDraw, XvPreempted);
+
+  status = (* pPort->pAdaptor->ddStopVideo)(client, pPort, pPort->pDraw);
+
+  pPort->pDraw = (DrawablePtr)NULL;
+  pPort->client = (ClientPtr)client;
+  pPort->time = currentTime;
+
+  return status;
+
+}
+
+int
+XvdiMatchPort(
+  XvPortPtr pPort,
+  DrawablePtr pDraw
+){
+
+  XvAdaptorPtr pa;
+  XvFormatPtr pf;
+  int nf;
+
+  pa = pPort->pAdaptor;
+
+  if (pa->pScreen != pDraw->pScreen) return BadMatch;
+
+  nf = pa->nFormats;
+  pf = pa->pFormats;
+
+  while (nf--)
+    {
+      if ((pf->depth == pDraw->depth) 
+#if 0
+         && ((pDraw->type == DRAWABLE_PIXMAP) || 
+	   (wVisual(((WindowPtr)pDraw)) == pf->visual))
+#endif
+	)
+	return Success;
+      pf++;
+    }
+
+  return BadMatch;
+
+}
+
+int
+XvdiSetPortAttribute(
+  ClientPtr client,
+  XvPortPtr pPort,
+  Atom attribute,
+  INT32 value
+){
+
+    XvdiSendPortNotify(pPort, attribute, value);
+
+  return 
+    (* pPort->pAdaptor->ddSetPortAttribute)(client, pPort, attribute, value);
+
+}
+
+int
+XvdiGetPortAttribute(
+  ClientPtr client,
+  XvPortPtr pPort,
+  Atom attribute,
+  INT32 *p_value
+){
+
+  return 
+    (* pPort->pAdaptor->ddGetPortAttribute)(client, pPort, attribute, p_value);
+
+}
+
+static void
+WriteSwappedVideoNotifyEvent(xvEvent *from, xvEvent *to)
+
+{
+
+  to->u.u.type = from->u.u.type;
+  to->u.u.detail = from->u.u.detail;
+  cpswaps(from->u.videoNotify.sequenceNumber, 
+	  to->u.videoNotify.sequenceNumber);
+  cpswapl(from->u.videoNotify.time, to->u.videoNotify.time);
+  cpswapl(from->u.videoNotify.drawable, to->u.videoNotify.drawable);
+  cpswapl(from->u.videoNotify.port, to->u.videoNotify.port);
+
+}
+
+static void
+WriteSwappedPortNotifyEvent(xvEvent *from, xvEvent *to)
+
+{
+
+  to->u.u.type = from->u.u.type;
+  to->u.u.detail = from->u.u.detail;
+  cpswaps(from->u.portNotify.sequenceNumber, to->u.portNotify.sequenceNumber);
+  cpswapl(from->u.portNotify.time, to->u.portNotify.time);
+  cpswapl(from->u.portNotify.port, to->u.portNotify.port);
+  cpswapl(from->u.portNotify.value, to->u.portNotify.value);
+
+}