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/* libmumblelink.c -- mumble link interface
Copyright (C) 2008 Ludwig Nussel <ludwig.nussel@suse.de>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifdef WIN32
#include <windows.h>
#define uint32_t UINT32
#else
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#endif
#include <fcntl.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "libmumblelink.h"
typedef struct
{
uint32_t uiVersion;
uint32_t uiTick;
float fPosition[3];
float fFront[3];
float fTop[3];
wchar_t name[256];
} LinkedMem;
static LinkedMem *lm = NULL;
#ifdef WIN32
static HANDLE hMapObject = NULL;
#else
static int32_t GetTickCount(void)
{
struct timeval tv;
gettimeofday(&tv,NULL);
return tv.tv_usec / 1000 + tv.tv_sec * 1000;
}
#endif
int mumble_link(const char* name)
{
#ifdef WIN32
if(lm)
return 0;
hMapObject = OpenFileMappingW(FILE_MAP_ALL_ACCESS, FALSE, L"MumbleLink");
if (hMapObject == NULL)
return -1;
lm = (LinkedMem *) MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(LinkedMem));
if (lm == NULL) {
CloseHandle(hMapObject);
hMapObject = NULL;
return -1;
}
#else
char file[256];
int shmfd;
if(lm)
return 0;
snprintf(file, sizeof (file), "/MumbleLink.%d", getuid());
shmfd = shm_open(file, O_RDWR, S_IRUSR | S_IWUSR);
if(shmfd < 0) {
return -1;
}
lm = (LinkedMem *) (mmap(NULL, sizeof(LinkedMem), PROT_READ | PROT_WRITE, MAP_SHARED, shmfd,0));
if (lm == (void *) (-1)) {
lm = NULL;
}
close(shmfd);
#endif
mbstowcs(lm->name, name, sizeof(lm->name));
return 0;
}
void mumble_update_coordinates(float fPosition[3], float fFront[3], float fTop[3])
{
if (!lm)
return;
memcpy(lm->fPosition, fPosition, sizeof(fPosition));
memcpy(lm->fFront, fFront, sizeof(fFront));
memcpy(lm->fTop, fTop, sizeof(fTop));
lm->uiVersion = 1;
lm->uiTick = GetTickCount();
}
void mumble_unlink()
{
if(!lm)
return;
#ifdef WIN32
UnmapViewOfFile(lm);
CloseHandle(hMapObject);
hMapObject = NULL;
#else
munmap(lm, sizeof(LinkedMem));
#endif
lm = NULL;
}
int mumble_islinked(void)
{
return lm != NULL;
}
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