xserver-multidpi/Xext/xvmc.c
Eamon Walsh 4017d31902 devPrivates rework: since API is already broken, switch everything
over to new system.

Need to update documentation and address some remaining vestiges of
old system such as CursorRec structure, fb "offman" structure, and
FontRec privates.
2007-08-28 09:28:25 -04:00

793 lines
20 KiB
C

#define NEED_REPLIES
#define NEED_EVENTS
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <string.h>
#include <X11/X.h>
#include <X11/Xproto.h>
#include "misc.h"
#include "os.h"
#include "dixstruct.h"
#include "resource.h"
#include "scrnintstr.h"
#include "extnsionst.h"
#include "servermd.h"
#include <X11/Xfuncproto.h>
#include "xvdix.h"
#include <X11/extensions/XvMC.h>
#include <X11/extensions/Xvproto.h>
#include <X11/extensions/XvMCproto.h>
#include "xvmcext.h"
#ifdef HAS_XVMCSHM
#ifndef Lynx
#include <sys/ipc.h>
#include <sys/types.h>
#include <sys/shm.h>
#else
#include <ipc.h>
#include <shm.h>
#endif /* Lynx */
#endif /* HAS_XVMCSHM */
#define DR_CLIENT_DRIVER_NAME_SIZE 48
#define DR_BUSID_SIZE 48
static DevPrivateKey XvMCScreenKey = NULL;
unsigned long XvMCGeneration = 0;
int XvMCReqCode;
int XvMCEventBase;
int XvMCErrorBase;
unsigned long XvMCRTContext;
unsigned long XvMCRTSurface;
unsigned long XvMCRTSubpicture;
typedef struct {
int num_adaptors;
XvMCAdaptorPtr adaptors;
CloseScreenProcPtr CloseScreen;
char clientDriverName[DR_CLIENT_DRIVER_NAME_SIZE];
char busID[DR_BUSID_SIZE];
int major;
int minor;
int patchLevel;
} XvMCScreenRec, *XvMCScreenPtr;
#define XVMC_GET_PRIVATE(pScreen) \
(XvMCScreenPtr)(dixLookupPrivate(&(pScreen)->devPrivates, XvMCScreenKey))
static int
XvMCDestroyContextRes(pointer data, XID id)
{
XvMCContextPtr pContext = (XvMCContextPtr)data;
pContext->refcnt--;
if(!pContext->refcnt) {
XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
(*pScreenPriv->adaptors[pContext->adapt_num].DestroyContext)(pContext);
xfree(pContext);
}
return Success;
}
static int
XvMCDestroySurfaceRes(pointer data, XID id)
{
XvMCSurfacePtr pSurface = (XvMCSurfacePtr)data;
XvMCContextPtr pContext = pSurface->context;
XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
(*pScreenPriv->adaptors[pContext->adapt_num].DestroySurface)(pSurface);
xfree(pSurface);
XvMCDestroyContextRes((pointer)pContext, pContext->context_id);
return Success;
}
static int
XvMCDestroySubpictureRes(pointer data, XID id)
{
XvMCSubpicturePtr pSubpict = (XvMCSubpicturePtr)data;
XvMCContextPtr pContext = pSubpict->context;
XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
(*pScreenPriv->adaptors[pContext->adapt_num].DestroySubpicture)(pSubpict);
xfree(pSubpict);
XvMCDestroyContextRes((pointer)pContext, pContext->context_id);
return Success;
}
static void
XvMCResetProc (ExtensionEntry *extEntry)
{
}
static int
ProcXvMCQueryVersion(ClientPtr client)
{
xvmcQueryVersionReply rep;
/* REQUEST(xvmcQueryVersionReq); */
REQUEST_SIZE_MATCH(xvmcQueryVersionReq);
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.length = 0;
rep.major = XvMCVersion;
rep.minor = XvMCRevision;
WriteToClient(client, sizeof(xvmcQueryVersionReply), (char*)&rep);
return Success;
}
static int
ProcXvMCListSurfaceTypes(ClientPtr client)
{
XvPortPtr pPort;
int i;
XvMCScreenPtr pScreenPriv;
xvmcListSurfaceTypesReply rep;
xvmcSurfaceInfo info;
XvMCAdaptorPtr adaptor = NULL;
XvMCSurfaceInfoPtr surface;
REQUEST(xvmcListSurfaceTypesReq);
REQUEST_SIZE_MATCH(xvmcListSurfaceTypesReq);
if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
client->errorValue = stuff->port;
return _XvBadPort;
}
if(XvMCScreenKey) { /* any adaptors at all */
ScreenPtr pScreen = pPort->pAdaptor->pScreen;
if((pScreenPriv = XVMC_GET_PRIVATE(pScreen))) { /* any this screen */
for(i = 0; i < pScreenPriv->num_adaptors; i++) {
if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
adaptor = &(pScreenPriv->adaptors[i]);
break;
}
}
}
}
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.num = (adaptor) ? adaptor->num_surfaces : 0;
rep.length = rep.num * sizeof(xvmcSurfaceInfo) >> 2;
WriteToClient(client, sizeof(xvmcListSurfaceTypesReply), (char*)&rep);
for(i = 0; i < rep.num; i++) {
surface = adaptor->surfaces[i];
info.surface_type_id = surface->surface_type_id;
info.chroma_format = surface->chroma_format;
info.max_width = surface->max_width;
info.max_height = surface->max_height;
info.subpicture_max_width = surface->subpicture_max_width;
info.subpicture_max_height = surface->subpicture_max_height;
info.mc_type = surface->mc_type;
info.flags = surface->flags;
WriteToClient(client, sizeof(xvmcSurfaceInfo), (char*)&info);
}
return Success;
}
static int
ProcXvMCCreateContext(ClientPtr client)
{
XvPortPtr pPort;
CARD32 *data = NULL;
int dwords = 0;
int i, result, adapt_num = -1;
ScreenPtr pScreen;
XvMCContextPtr pContext;
XvMCScreenPtr pScreenPriv;
XvMCAdaptorPtr adaptor = NULL;
XvMCSurfaceInfoPtr surface = NULL;
xvmcCreateContextReply rep;
REQUEST(xvmcCreateContextReq);
REQUEST_SIZE_MATCH(xvmcCreateContextReq);
if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
client->errorValue = stuff->port;
return _XvBadPort;
}
pScreen = pPort->pAdaptor->pScreen;
if(XvMCScreenKey == NULL) /* no XvMC adaptors */
return BadMatch;
if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen))) /* none this screen */
return BadMatch;
for(i = 0; i < pScreenPriv->num_adaptors; i++) {
if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
adaptor = &(pScreenPriv->adaptors[i]);
adapt_num = i;
break;
}
}
if(adapt_num < 0) /* none this port */
return BadMatch;
for(i = 0; i < adaptor->num_surfaces; i++) {
if(adaptor->surfaces[i]->surface_type_id == stuff->surface_type_id) {
surface = adaptor->surfaces[i];
break;
}
}
/* adaptor doesn't support this suface_type_id */
if(!surface) return BadMatch;
if((stuff->width > surface->max_width) ||
(stuff->height > surface->max_height))
return BadValue;
if(!(pContext = xalloc(sizeof(XvMCContextRec)))) {
return BadAlloc;
}
pContext->pScreen = pScreen;
pContext->adapt_num = adapt_num;
pContext->context_id = stuff->context_id;
pContext->surface_type_id = stuff->surface_type_id;
pContext->width = stuff->width;
pContext->height = stuff->height;
pContext->flags = stuff->flags;
pContext->refcnt = 1;
result = (*adaptor->CreateContext)(pPort, pContext, &dwords, &data);
if(result != Success) {
xfree(pContext);
return result;
}
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.width_actual = pContext->width;
rep.height_actual = pContext->height;
rep.flags_return = pContext->flags;
rep.length = dwords;
WriteToClient(client, sizeof(xvmcCreateContextReply), (char*)&rep);
if(dwords)
WriteToClient(client, dwords << 2, (char*)data);
AddResource(pContext->context_id, XvMCRTContext, pContext);
if(data)
xfree(data);
return Success;
}
static int
ProcXvMCDestroyContext(ClientPtr client)
{
REQUEST(xvmcDestroyContextReq);
REQUEST_SIZE_MATCH(xvmcDestroyContextReq);
if(!LookupIDByType(stuff->context_id, XvMCRTContext))
return (XvMCBadContext + XvMCErrorBase);
FreeResource(stuff->context_id, RT_NONE);
return Success;
}
static int
ProcXvMCCreateSurface(ClientPtr client)
{
CARD32 *data = NULL;
int dwords = 0;
int result;
XvMCContextPtr pContext;
XvMCSurfacePtr pSurface;
XvMCScreenPtr pScreenPriv;
xvmcCreateSurfaceReply rep;
REQUEST(xvmcCreateSurfaceReq);
REQUEST_SIZE_MATCH(xvmcCreateSurfaceReq);
if(!(pContext = LookupIDByType(stuff->context_id, XvMCRTContext)))
return (XvMCBadContext + XvMCErrorBase);
pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
if(!(pSurface = xalloc(sizeof(XvMCSurfaceRec))))
return BadAlloc;
pSurface->surface_id = stuff->surface_id;
pSurface->surface_type_id = pContext->surface_type_id;
pSurface->context = pContext;
result = (*pScreenPriv->adaptors[pContext->adapt_num].CreateSurface)(
pSurface, &dwords, &data);
if(result != Success) {
xfree(pSurface);
return result;
}
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.length = dwords;
WriteToClient(client, sizeof(xvmcCreateSurfaceReply), (char*)&rep);
if(dwords)
WriteToClient(client, dwords << 2, (char*)data);
AddResource(pSurface->surface_id, XvMCRTSurface, pSurface);
if(data)
xfree(data);
pContext->refcnt++;
return Success;
}
static int
ProcXvMCDestroySurface(ClientPtr client)
{
REQUEST(xvmcDestroySurfaceReq);
REQUEST_SIZE_MATCH(xvmcDestroySurfaceReq);
if(!LookupIDByType(stuff->surface_id, XvMCRTSurface))
return (XvMCBadSurface + XvMCErrorBase);
FreeResource(stuff->surface_id, RT_NONE);
return Success;
}
static int
ProcXvMCCreateSubpicture(ClientPtr client)
{
Bool image_supported = FALSE;
CARD32 *data = NULL;
int i, result, dwords = 0;
XvMCContextPtr pContext;
XvMCSubpicturePtr pSubpicture;
XvMCScreenPtr pScreenPriv;
xvmcCreateSubpictureReply rep;
XvMCAdaptorPtr adaptor;
XvMCSurfaceInfoPtr surface = NULL;
REQUEST(xvmcCreateSubpictureReq);
REQUEST_SIZE_MATCH(xvmcCreateSubpictureReq);
if(!(pContext = LookupIDByType(stuff->context_id, XvMCRTContext)))
return (XvMCBadContext + XvMCErrorBase);
pScreenPriv = XVMC_GET_PRIVATE(pContext->pScreen);
adaptor = &(pScreenPriv->adaptors[pContext->adapt_num]);
/* find which surface this context supports */
for(i = 0; i < adaptor->num_surfaces; i++) {
if(adaptor->surfaces[i]->surface_type_id == pContext->surface_type_id){
surface = adaptor->surfaces[i];
break;
}
}
if(!surface) return BadMatch;
/* make sure this surface supports that xvimage format */
if(!surface->compatible_subpictures) return BadMatch;
for(i = 0; i < surface->compatible_subpictures->num_xvimages; i++) {
if(surface->compatible_subpictures->xvimage_ids[i] == stuff->xvimage_id) {
image_supported = TRUE;
break;
}
}
if(!image_supported) return BadMatch;
/* make sure the size is OK */
if((stuff->width > surface->subpicture_max_width) ||
(stuff->height > surface->subpicture_max_height))
return BadValue;
if(!(pSubpicture = xalloc(sizeof(XvMCSubpictureRec))))
return BadAlloc;
pSubpicture->subpicture_id = stuff->subpicture_id;
pSubpicture->xvimage_id = stuff->xvimage_id;
pSubpicture->width = stuff->width;
pSubpicture->height = stuff->height;
pSubpicture->num_palette_entries = 0; /* overwritten by DDX */
pSubpicture->entry_bytes = 0; /* overwritten by DDX */
pSubpicture->component_order[0] = 0; /* overwritten by DDX */
pSubpicture->component_order[1] = 0;
pSubpicture->component_order[2] = 0;
pSubpicture->component_order[3] = 0;
pSubpicture->context = pContext;
result = (*pScreenPriv->adaptors[pContext->adapt_num].CreateSubpicture)(
pSubpicture, &dwords, &data);
if(result != Success) {
xfree(pSubpicture);
return result;
}
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.width_actual = pSubpicture->width;
rep.height_actual = pSubpicture->height;
rep.num_palette_entries = pSubpicture->num_palette_entries;
rep.entry_bytes = pSubpicture->entry_bytes;
rep.component_order[0] = pSubpicture->component_order[0];
rep.component_order[1] = pSubpicture->component_order[1];
rep.component_order[2] = pSubpicture->component_order[2];
rep.component_order[3] = pSubpicture->component_order[3];
rep.length = dwords;
WriteToClient(client, sizeof(xvmcCreateSubpictureReply), (char*)&rep);
if(dwords)
WriteToClient(client, dwords << 2, (char*)data);
AddResource(pSubpicture->subpicture_id, XvMCRTSubpicture, pSubpicture);
if(data)
xfree(data);
pContext->refcnt++;
return Success;
}
static int
ProcXvMCDestroySubpicture(ClientPtr client)
{
REQUEST(xvmcDestroySubpictureReq);
REQUEST_SIZE_MATCH(xvmcDestroySubpictureReq);
if(!LookupIDByType(stuff->subpicture_id, XvMCRTSubpicture))
return (XvMCBadSubpicture + XvMCErrorBase);
FreeResource(stuff->subpicture_id, RT_NONE);
return Success;
}
static int
ProcXvMCListSubpictureTypes(ClientPtr client)
{
XvPortPtr pPort;
xvmcListSubpictureTypesReply rep;
XvMCScreenPtr pScreenPriv;
ScreenPtr pScreen;
XvMCAdaptorPtr adaptor = NULL;
XvMCSurfaceInfoPtr surface = NULL;
xvImageFormatInfo info;
XvImagePtr pImage;
int i, j;
REQUEST(xvmcListSubpictureTypesReq);
REQUEST_SIZE_MATCH(xvmcListSubpictureTypesReq);
if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
client->errorValue = stuff->port;
return _XvBadPort;
}
pScreen = pPort->pAdaptor->pScreen;
if(XvMCScreenKey == NULL) /* No XvMC adaptors */
return BadMatch;
if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen)))
return BadMatch; /* None this screen */
for(i = 0; i < pScreenPriv->num_adaptors; i++) {
if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
adaptor = &(pScreenPriv->adaptors[i]);
break;
}
}
if(!adaptor) return BadMatch;
for(i = 0; i < adaptor->num_surfaces; i++) {
if(adaptor->surfaces[i]->surface_type_id == stuff->surface_type_id) {
surface = adaptor->surfaces[i];
break;
}
}
if(!surface) return BadMatch;
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.num = 0;
if(surface->compatible_subpictures)
rep.num = surface->compatible_subpictures->num_xvimages;
rep.length = rep.num * sizeof(xvImageFormatInfo) >> 2;
WriteToClient(client, sizeof(xvmcListSubpictureTypesReply), (char*)&rep);
for(i = 0; i < rep.num; i++) {
pImage = NULL;
for(j = 0; j < adaptor->num_subpictures; j++) {
if(surface->compatible_subpictures->xvimage_ids[i] ==
adaptor->subpictures[j]->id)
{
pImage = adaptor->subpictures[j];
break;
}
}
if(!pImage) return BadImplementation;
info.id = pImage->id;
info.type = pImage->type;
info.byte_order = pImage->byte_order;
memcpy(&info.guid, pImage->guid, 16);
info.bpp = pImage->bits_per_pixel;
info.num_planes = pImage->num_planes;
info.depth = pImage->depth;
info.red_mask = pImage->red_mask;
info.green_mask = pImage->green_mask;
info.blue_mask = pImage->blue_mask;
info.format = pImage->format;
info.y_sample_bits = pImage->y_sample_bits;
info.u_sample_bits = pImage->u_sample_bits;
info.v_sample_bits = pImage->v_sample_bits;
info.horz_y_period = pImage->horz_y_period;
info.horz_u_period = pImage->horz_u_period;
info.horz_v_period = pImage->horz_v_period;
info.vert_y_period = pImage->vert_y_period;
info.vert_u_period = pImage->vert_u_period;
info.vert_v_period = pImage->vert_v_period;
memcpy(&info.comp_order, pImage->component_order, 32);
info.scanline_order = pImage->scanline_order;
WriteToClient(client, sizeof(xvImageFormatInfo), (char*)&info);
}
return Success;
}
static int
ProcXvMCGetDRInfo(ClientPtr client)
{
xvmcGetDRInfoReply rep;
XvPortPtr pPort;
ScreenPtr pScreen;
XvMCScreenPtr pScreenPriv;
#ifdef HAS_XVMCSHM
volatile CARD32 *patternP;
#endif
REQUEST(xvmcGetDRInfoReq);
REQUEST_SIZE_MATCH(xvmcGetDRInfoReq);
if(!(pPort = LOOKUP_PORT(stuff->port, client))) {
client->errorValue = stuff->port;
return _XvBadPort;
}
pScreen = pPort->pAdaptor->pScreen;
pScreenPriv = XVMC_GET_PRIVATE(pScreen);
rep.type = X_Reply;
rep.sequenceNumber = client->sequence;
rep.major = pScreenPriv->major;
rep.minor = pScreenPriv->minor;
rep.patchLevel = pScreenPriv->patchLevel;
rep.nameLen = (strlen(pScreenPriv->clientDriverName) + 4) >> 2;
rep.busIDLen = (strlen(pScreenPriv->busID) + 4) >> 2;
rep.length = rep.nameLen + rep.busIDLen;
rep.nameLen <<=2;
rep.busIDLen <<=2;
/*
* Read back to the client what she has put in the shared memory
* segment she prepared for us.
*/
rep.isLocal = 1;
#ifdef HAS_XVMCSHM
patternP = (CARD32 *)shmat( stuff->shmKey, NULL, SHM_RDONLY );
if ( -1 != (long) patternP) {
register volatile CARD32 *patternC = patternP;
register int i;
CARD32 magic = stuff->magic;
rep.isLocal = 1;
i = 1024 / sizeof(CARD32);
while ( i-- ) {
if (*patternC++ != magic) {
rep.isLocal = 0;
break;
}
magic = ~magic;
}
shmdt( (char *)patternP );
}
#endif /* HAS_XVMCSHM */
WriteToClient(client, sizeof(xvmcGetDRInfoReply),
(char*)&rep);
if (rep.length) {
WriteToClient(client, rep.nameLen,
pScreenPriv->clientDriverName);
WriteToClient(client, rep.busIDLen,
pScreenPriv->busID);
}
return Success;
}
int (*ProcXvMCVector[xvmcNumRequest])(ClientPtr) = {
ProcXvMCQueryVersion,
ProcXvMCListSurfaceTypes,
ProcXvMCCreateContext,
ProcXvMCDestroyContext,
ProcXvMCCreateSurface,
ProcXvMCDestroySurface,
ProcXvMCCreateSubpicture,
ProcXvMCDestroySubpicture,
ProcXvMCListSubpictureTypes,
ProcXvMCGetDRInfo
};
static int
ProcXvMCDispatch (ClientPtr client)
{
REQUEST(xReq);
if(stuff->data < xvmcNumRequest)
return (*ProcXvMCVector[stuff->data])(client);
else
return BadRequest;
}
static int
SProcXvMCDispatch (ClientPtr client)
{
/* We only support local */
return BadImplementation;
}
void
XvMCExtensionInit(void)
{
ExtensionEntry *extEntry;
if(XvMCScreenKey == NULL) /* nobody supports it */
return;
if(!(XvMCRTContext = CreateNewResourceType(XvMCDestroyContextRes)))
return;
if(!(XvMCRTSurface = CreateNewResourceType(XvMCDestroySurfaceRes)))
return;
if(!(XvMCRTSubpicture = CreateNewResourceType(XvMCDestroySubpictureRes)))
return;
extEntry = AddExtension(XvMCName, XvMCNumEvents, XvMCNumErrors,
ProcXvMCDispatch, SProcXvMCDispatch,
XvMCResetProc, StandardMinorOpcode);
if(!extEntry) return;
XvMCReqCode = extEntry->base;
XvMCEventBase = extEntry->eventBase;
XvMCErrorBase = extEntry->errorBase;
}
static Bool
XvMCCloseScreen (int i, ScreenPtr pScreen)
{
XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pScreen);
pScreen->CloseScreen = pScreenPriv->CloseScreen;
xfree(pScreenPriv);
return (*pScreen->CloseScreen)(i, pScreen);
}
int
XvMCScreenInit(ScreenPtr pScreen, int num, XvMCAdaptorPtr pAdapt)
{
XvMCScreenPtr pScreenPriv;
XvMCScreenKey = &XvMCScreenKey;
if(!(pScreenPriv = (XvMCScreenPtr)xalloc(sizeof(XvMCScreenRec))))
return BadAlloc;
dixSetPrivate(&pScreen->devPrivates, XvMCScreenKey, pScreenPriv);
pScreenPriv->CloseScreen = pScreen->CloseScreen;
pScreen->CloseScreen = XvMCCloseScreen;
pScreenPriv->num_adaptors = num;
pScreenPriv->adaptors = pAdapt;
pScreenPriv->clientDriverName[0] = 0;
pScreenPriv->busID[0] = 0;
pScreenPriv->major = 0;
pScreenPriv->minor = 0;
pScreenPriv->patchLevel = 0;
return Success;
}
XvImagePtr XvMCFindXvImage(XvPortPtr pPort, CARD32 id)
{
XvImagePtr pImage = NULL;
ScreenPtr pScreen = pPort->pAdaptor->pScreen;
XvMCScreenPtr pScreenPriv;
XvMCAdaptorPtr adaptor = NULL;
int i;
if(XvMCScreenKey == NULL) return NULL;
if(!(pScreenPriv = XVMC_GET_PRIVATE(pScreen)))
return NULL;
for(i = 0; i < pScreenPriv->num_adaptors; i++) {
if(pPort->pAdaptor == pScreenPriv->adaptors[i].xv_adaptor) {
adaptor = &(pScreenPriv->adaptors[i]);
break;
}
}
if(!adaptor) return NULL;
for(i = 0; i < adaptor->num_subpictures; i++) {
if(adaptor->subpictures[i]->id == id) {
pImage = adaptor->subpictures[i];
break;
}
}
return pImage;
}
int
xf86XvMCRegisterDRInfo(ScreenPtr pScreen, char *name,
char *busID, int major, int minor,
int patchLevel)
{
XvMCScreenPtr pScreenPriv = XVMC_GET_PRIVATE(pScreen);
strncpy(pScreenPriv->clientDriverName, name,
DR_CLIENT_DRIVER_NAME_SIZE);
strncpy(pScreenPriv->busID, busID, DR_BUSID_SIZE);
pScreenPriv->major = major;
pScreenPriv->minor = minor;
pScreenPriv->patchLevel = patchLevel;
pScreenPriv->clientDriverName[DR_CLIENT_DRIVER_NAME_SIZE-1] = 0;
pScreenPriv->busID[DR_BUSID_SIZE-1] = 0;
return Success;
}