mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
21888c5f50
Added --with-configdir and --with-plugindir options to configure which specify the directories for config files and plugin objects respectively. The default paths when these options are not specified are unchanged.
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
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* Mixer Interface - simple abstact module - base library (dlopen function)
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* Copyright (c) 2005 by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <math.h>
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#include <dlfcn.h>
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#include "config.h"
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#include "asoundlib.h"
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#include "mixer_abst.h"
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#include "sbase.h"
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#define SO_PATH ALSA_PLUGIN_DIR "/smixer"
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int mixer_simple_basic_dlopen(snd_mixer_class_t *class,
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bclass_base_ops_t **ops)
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{
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struct bclass_private *priv = snd_mixer_sbasic_get_private(class);
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const char *lib = "smixer-sbase.so";
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void (*initpriv)(snd_mixer_class_t *class, struct bclass_private *priv);
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char *xlib, *path;
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void *h;
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int initflag = 0;
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if (priv == NULL) {
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priv = calloc(1, sizeof(*priv));
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if (priv == NULL)
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return -ENOMEM;
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initflag = 1;
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}
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path = getenv("ALSA_MIXER_SIMPLE_MODULES");
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if (!path)
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path = SO_PATH;
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xlib = malloc(strlen(lib) + strlen(path) + 1 + 1);
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if (xlib == NULL) {
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if (initflag)
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free(priv);
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return -ENOMEM;
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}
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strcpy(xlib, path);
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strcat(xlib, "/");
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strcat(xlib, lib);
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h = snd_dlopen(xlib, RTLD_NOW);
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if (h == NULL) {
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SNDERR("Unable to open library '%s'", xlib);
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goto __error;
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}
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initpriv = dlsym(h, "alsa_mixer_sbasic_initpriv");
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if (initpriv == NULL) {
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SNDERR("Symbol 'alsa_mixer_sbasic_initpriv' was not found in '%s'", xlib);
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goto __error;
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}
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priv->ops.event = dlsym(h, "alsa_mixer_sbasic_event");
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if (priv->ops.event == NULL) {
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SNDERR("Symbol 'alsa_mixer_sbasic_event' was not found in '%s'", xlib);
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goto __error;
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}
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priv->ops.selreg = dlsym(h, "alsa_mixer_sbasic_selreg");
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if (priv->ops.selreg == NULL) {
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SNDERR("Symbol 'alsa_mixer_sbasic_selreg' was not found in '%s'", xlib);
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goto __error;
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}
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priv->ops.sidreg = dlsym(h, "alsa_mixer_sbasic_sidreg");
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if (priv->ops.sidreg == NULL) {
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SNDERR("Symbol 'alsa_mixer_sbasic_sidreg' was not found in '%s'", xlib);
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goto __error;
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}
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free(xlib);
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if (initflag)
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initpriv(class, priv);
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priv->dl_sbase = h;
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if (ops)
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*ops = &priv->ops;
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return 1;
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__error:
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if (initflag)
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free(priv);
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if (h == NULL)
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snd_dlclose(h);
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free(xlib);
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return -ENXIO;
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}
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