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/*
* Copyright (c) 2008-2009 NVIDIA, Corporation
*
* 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, sublicense, 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <dlfcn.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vdpau/vdpau_x11.h>
#if DRI2
#include "mesa_dri2.h"
#include <X11/Xlib.h>
#endif
typedef void SetDllHandle(
void * driver_dll_handle
);
static void * _vdp_backend_dll;
static void * _vdp_trace_dll;
static void * _vdp_driver_dll;
static VdpDeviceCreateX11 * _vdp_imp_device_create_x11_proc;
#if defined(__GNUC__)
static void _vdp_close_driver(void) __attribute__((destructor));
#endif
#if DEBUG
static void _vdp_wrapper_error_breakpoint(char const * file, int line, char const * function)
{
fprintf(stderr, "VDPAU wrapper: Error detected at %s:%d %s()\n", file, line, function);
}
#define _VDP_ERROR_BREAKPOINT() _vdp_wrapper_error_breakpoint(__FILE__, __LINE__, __FUNCTION__)
#else
#define _VDP_ERROR_BREAKPOINT()
#endif
#define DRIVER_LIB_FORMAT "%slibvdpau_%s.so%s"
static char * _vdp_get_driver_name_from_dri2(
Display * display,
int screen
)
{
char * driver_name = NULL;
#if DRI2
Window root = RootWindow(display, screen);
int event_base, error_base;
int major, minor;
char * device_name;
if (!_vdp_DRI2QueryExtension(display, &event_base, &error_base)) {
return NULL;
}
if (!_vdp_DRI2QueryVersion(display, &major, &minor) ||
(major < 1 || (major == 1 && minor < 2))) {
return NULL;
}
if (!_vdp_DRI2Connect(display, root, &driver_name, &device_name)) {
return NULL;
}
XFree(device_name);
#endif /* DRI2 */
return driver_name;
}
static VdpStatus _vdp_open_driver(
Display * display,
int screen)
{
char const * vdpau_driver;
char * vdpau_driver_dri2 = NULL;
char vdpau_driver_lib[PATH_MAX];
char const * vdpau_trace;
char const * func_name;
vdpau_driver = getenv("VDPAU_DRIVER");
if (!vdpau_driver) {
vdpau_driver = vdpau_driver_dri2 =
_vdp_get_driver_name_from_dri2(display, screen);
}
if (!vdpau_driver) {
vdpau_driver = "nvidia";
}
if (snprintf(vdpau_driver_lib, sizeof(vdpau_driver_lib), DRIVER_LIB_FORMAT,
VDPAU_MODULEDIR "/", vdpau_driver, ".1") >=
sizeof(vdpau_driver_lib)) {
fprintf(stderr, "Failed to construct driver path: path too long\n");
if (vdpau_driver_dri2) {
XFree(vdpau_driver_dri2);
vdpau_driver_dri2 = NULL;
}
_VDP_ERROR_BREAKPOINT();
return VDP_STATUS_NO_IMPLEMENTATION;
}
_vdp_driver_dll = dlopen(vdpau_driver_lib, RTLD_NOW | RTLD_GLOBAL);
if (!_vdp_driver_dll) {
/* Try again using the old path, which is guaranteed to fit in PATH_MAX
* if the complete path fit above. */
snprintf(vdpau_driver_lib, sizeof(vdpau_driver_lib), DRIVER_LIB_FORMAT,
"", vdpau_driver, "");
_vdp_driver_dll = dlopen(vdpau_driver_lib, RTLD_NOW | RTLD_GLOBAL);
}
if (vdpau_driver_dri2) {
XFree(vdpau_driver_dri2);
vdpau_driver_dri2 = NULL;
}
if (!_vdp_driver_dll) {
fprintf(stderr, "Failed to open VDPAU backend %s\n", dlerror());
_VDP_ERROR_BREAKPOINT();
return VDP_STATUS_NO_IMPLEMENTATION;
}
_vdp_backend_dll = _vdp_driver_dll;
vdpau_trace = getenv("VDPAU_TRACE");
if (vdpau_trace && atoi(vdpau_trace)) {
SetDllHandle * set_dll_handle;
_vdp_trace_dll = dlopen(VDPAU_MODULEDIR "/libvdpau_trace.so.1",
RTLD_NOW | RTLD_GLOBAL);
if (!_vdp_trace_dll) {
fprintf(stderr, "Failed to open VDPAU trace library %s\n", dlerror());
_VDP_ERROR_BREAKPOINT();
return VDP_STATUS_NO_IMPLEMENTATION;
}
set_dll_handle = (SetDllHandle*)dlsym(
_vdp_trace_dll,
"vdp_trace_set_backend_handle"
);
if (!set_dll_handle) {
fprintf(stderr, "%s\n", dlerror());
_VDP_ERROR_BREAKPOINT();
return VDP_STATUS_NO_IMPLEMENTATION;
}
set_dll_handle(_vdp_backend_dll);
_vdp_backend_dll = _vdp_trace_dll;
func_name = "vdp_trace_device_create_x11";
}
else {
func_name = "vdp_imp_device_create_x11";
}
_vdp_imp_device_create_x11_proc = (VdpDeviceCreateX11*)dlsym(
_vdp_backend_dll,
func_name
);
if (!_vdp_imp_device_create_x11_proc) {
fprintf(stderr, "%s\n", dlerror());
_VDP_ERROR_BREAKPOINT();
return VDP_STATUS_NO_IMPLEMENTATION;
}
return VDP_STATUS_OK;
}
static void _vdp_close_driver(void)
{
if (_vdp_driver_dll) {
dlclose(_vdp_driver_dll);
_vdp_driver_dll = NULL;
}
if (_vdp_trace_dll) {
dlclose(_vdp_trace_dll);
_vdp_trace_dll = NULL;
}
_vdp_backend_dll = NULL;
_vdp_imp_device_create_x11_proc = NULL;
}
VdpStatus vdp_device_create_x11(
Display * display,
int screen,
/* output parameters follow */
VdpDevice * device,
VdpGetProcAddress * * get_proc_address
)
{
VdpStatus status;
if (!_vdp_imp_device_create_x11_proc) {
status = _vdp_open_driver(display, screen);
if (status != VDP_STATUS_OK) {
_vdp_close_driver();
return status;
}
}
return _vdp_imp_device_create_x11_proc(
display,
screen,
device,
get_proc_address
);
}
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