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/*
* nvidia-settings: A tool for configuring the NVIDIA X driver on Unix
* and Linux systems.
*
* Copyright (C) 2004 NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses>.
*/
#include "NvCtrlAttributes.h"
#include "NvCtrlAttributesPrivate.h"
#include <X11/extensions/Xvlib.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include "common-utils.h"
#include "msg.h"
typedef struct __libXvInfoRec {
/* libXv.so library handle */
void *handle;
int ref_count; /* # users of the library */
/* libXv functions used */
int (* XvQueryExtension) (Display *, unsigned int *,
unsigned int *, unsigned int *,
unsigned int *, unsigned int *);
int (* XvQueryAdaptors) (Display *, Window, unsigned int *,
XvAdaptorInfo **);
} __libXvInfo;
static __libXvInfo *__libXv = NULL;
/*
* Opens libXv for usage
*/
static Bool open_libxv(void)
{
const char *error_str = NULL;
/* Initialize bookkeeping structure */
if ( !__libXv ) {
__libXv = nvalloc(sizeof(__libXvInfo));
}
/* Library was already opened */
if ( __libXv->handle ) {
__libXv->ref_count++;
return True;
}
/* We are the first to open the library */
__libXv->handle = dlopen("libXv.so.1", RTLD_LAZY);
if ( __libXv->handle == NULL ) {
error_str = dlerror();
goto fail;
}
/* Resolve Xv functions */
__libXv->XvQueryExtension =
NV_DLSYM(__libXv->handle, "XvQueryExtension");
if ((error_str = dlerror()) != NULL) goto fail;
__libXv->XvQueryAdaptors =
NV_DLSYM(__libXv->handle, "XvQueryAdaptors");
if ((error_str = dlerror()) != NULL) goto fail;
if ((error_str = dlerror()) != NULL) goto fail;
/* Up the ref count */
__libXv->ref_count++;
return True;
fail:
if ( error_str ) {
nv_error_msg("libXv setup error : %s\n", error_str);
}
if ( __libXv ) {
if ( __libXv->handle ) {
dlclose(__libXv->handle);
__libXv->handle = NULL;
}
free(__libXv);
__libXv = NULL;
}
return False;
} /* open_libxv() */
/*
* Closes libXv when it is no longer used.
*/
static void close_libxv(void)
{
if ( __libXv && __libXv->handle && __libXv->ref_count ) {
__libXv->ref_count--;
if ( __libXv->ref_count == 0 ) {
dlclose(__libXv->handle);
__libXv->handle = NULL;
free(__libXv);
__libXv = NULL;
}
}
} /* close_libxv() */
/*
* NvCtrlInitXvAttributes() - scan through the list of Xv adaptors on
* the given Display for the video overlay adaptor. Get the
* attributes "XV_CONTRAST", "XV_BRIGHTNESS", "XV_SATURATION",
* "XV_HUE" and "XV_SET_DEFAULTS". Returns a malloced and initialized
* NvCtrlXvOverlayAttributes struct if an nv10 or nv17 video overlay
* adaptor was found with all the needed attributes, or NULL
* otherwise.
*/
NvCtrlXvAttributes * NvCtrlInitXvAttributes(NvCtrlAttributePrivateHandle *h)
{
NvCtrlXvAttributes *xv = NULL;
XvAdaptorInfo *ainfo;
unsigned int req, event_base, error_base, nadaptors;
int ret, i;
const char *error_str = NULL;
const char *warn_str = NULL;
/* Check parameters */
if ( !h || !h->dpy || h->target_type != X_SCREEN_TARGET ) {
goto fail;
}
/* Open libXv.so.1 */
if ( !open_libxv() ) {
warn_str = "Failed to open libXv.so.1: this library "
"is not present in your system or is not in your "
"LD_LIBRARY_PATH.";
goto fail;
}
/* Allocate the attributes structure */
xv = nvalloc(sizeof(NvCtrlXvAttributes));
/* Verify server support of Xv extension */
ret = __libXv->XvQueryExtension(h->dpy, &(xv->major_version), &(xv->minor_version), &req,
&event_base, &error_base);
if (ret != Success) goto fail;
/* Get the list of adaptors */
ret = __libXv->XvQueryAdaptors(h->dpy, RootWindow(h->dpy, h->target_id),
&nadaptors, &ainfo);
if (ret != Success || !nadaptors || !ainfo) goto fail;
for (i = 0; i < nadaptors; i++) {
if ((strcmp(ainfo[i].name, "NV17 Video Overlay") == 0) ||
(strcmp(ainfo[i].name, "NV10 Video Overlay") == 0)) {
xv->overlay = True;
}
if (strcmp(ainfo[i].name, "NV17 Video Texture") == 0) {
xv->texture = True;
}
if (strcmp(ainfo[i].name, "NV05 Video Blitter") == 0) {
xv->blitter = True;
}
}
return xv;
/* Handle failures */
fail:
if (error_str) {
nv_error_msg("libXv setup error: %s\n", error_str);
}
if (warn_str) {
nv_warning_msg("libXv setup warning: %s\n", warn_str);
}
free(xv);
return NULL;
} /* NvCtrlInitXvAttributes() */
/*
* Get Xv String Attribute values
*/
ReturnStatus NvCtrlXvGetStringAttribute(const NvCtrlAttributePrivateHandle *h,
unsigned int display_mask,
int attr, char **ptr)
{
/* Validate */
if ( !h || !h->dpy || h->target_type != X_SCREEN_TARGET ) {
return NvCtrlBadHandle;
}
if ( !h->xv || !__libXv ) {
return NvCtrlMissingExtension;
}
/* Get Xv major & minor versions */
if (attr == NV_CTRL_STRING_XV_VERSION) {
char str[16];
sprintf(str, "%d.%d", h->xv->major_version, h->xv->minor_version);
*ptr = strdup(str);
return NvCtrlSuccess;
}
return NvCtrlNoAttribute;
} /* NvCtrlXvGetStringAttribute() */
/*
* Frees and relinquishes any resource used by the Xv Attributes
*/
void
NvCtrlXvAttributesClose (NvCtrlAttributePrivateHandle *h)
{
if (!h || !h->xv) {
return;
}
close_libxv();
free(h->xv);
h->xv = NULL;
} /* NvCtrlXvAttributesClose() */
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