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/*
* Mixer Interface - simple abstact module - base library (dlopen function)
* Copyright (c) 2005-2008 by Jaroslav Kysela <perex@perex.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <math.h>
#include <dlfcn.h>
#include "config.h"
#include "asoundlib.h"
#include "mixer_abst.h"
#include "sbase.h"
#define SO_PATH ALSA_PLUGIN_DIR "/smixer"
int mixer_simple_basic_dlopen(snd_mixer_class_t *class,
bclass_base_ops_t **ops)
{
struct bclass_private *priv = snd_mixer_sbasic_get_private(class);
const char *lib = "smixer-sbase.so";
void (*initpriv)(snd_mixer_class_t *class, struct bclass_private *priv);
char *xlib, *path;
void *h;
int initflag = 0;
if (priv == NULL) {
priv = calloc(1, sizeof(*priv));
if (priv == NULL)
return -ENOMEM;
initflag = 1;
}
path = getenv("ALSA_MIXER_SIMPLE_MODULES");
if (!path)
path = SO_PATH;
xlib = malloc(strlen(lib) + strlen(path) + 1 + 1);
if (xlib == NULL) {
if (initflag)
free(priv);
return -ENOMEM;
}
strcpy(xlib, path);
strcat(xlib, "/");
strcat(xlib, lib);
h = snd_dlopen(xlib, RTLD_NOW);
if (h == NULL) {
SNDERR("Unable to open library '%s'", xlib);
goto __error;
}
initpriv = dlsym(h, "alsa_mixer_sbasic_initpriv");
if (initpriv == NULL) {
SNDERR("Symbol 'alsa_mixer_sbasic_initpriv' was not found in '%s'", xlib);
goto __error;
}
priv->ops.event = dlsym(h, "alsa_mixer_sbasic_event");
if (priv->ops.event == NULL) {
SNDERR("Symbol 'alsa_mixer_sbasic_event' was not found in '%s'", xlib);
goto __error;
}
priv->ops.selreg = dlsym(h, "alsa_mixer_sbasic_selreg");
if (priv->ops.selreg == NULL) {
SNDERR("Symbol 'alsa_mixer_sbasic_selreg' was not found in '%s'", xlib);
goto __error;
}
priv->ops.sidreg = dlsym(h, "alsa_mixer_sbasic_sidreg");
if (priv->ops.sidreg == NULL) {
SNDERR("Symbol 'alsa_mixer_sbasic_sidreg' was not found in '%s'", xlib);
goto __error;
}
free(xlib);
if (initflag)
initpriv(class, priv);
priv->dl_sbase = h;
if (ops)
*ops = &priv->ops;
return 1;
__error:
if (initflag)
free(priv);
if (h == NULL)
snd_dlclose(h);
free(xlib);
return -ENXIO;
}
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