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#include <dirent.h>
#include <dlfcn.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "plugins.h"
#include "md5/md5.h"
// deadbeef api
DB_functions_t deadbeef_api = {
.ev_subscribe = plug_ev_subscribe,
.ev_unsubscribe = plug_ev_unsubscribe,
.md5 = plug_md5,
.md5_to_str = plug_md5_to_str
};
void
plug_md5 (uint8_t sig[16], const char *in, int len) {
md5_buffer (in, len, sig);
}
void
plug_md5_to_str (char *str, const uint8_t sig[16]) {
md5_sig_to_string ((char *)sig, str, 33);
}
// event handlers
typedef struct {
DB_plugin_t *plugin;
db_callback_t callback;
uintptr_t data;
} evhandler_t;
#define MAX_HANDLERS 100
static evhandler_t handlers[DB_EV_MAX][MAX_HANDLERS];
// plugin control structures
typedef struct plugin_s {
void *handle;
DB_plugin_t *plugin;
struct plugin_s *next;
} plugin_t;
plugin_t *plugins;
void
plug_ev_subscribe (DB_plugin_t *plugin, int ev, db_callback_t callback, uintptr_t data) {
assert (ev < DB_EV_MAX && ev >= 0);
for (int i = 0; i < MAX_HANDLERS; i++) {
if (!handlers[ev][i].plugin) {
handlers[ev][i].plugin = plugin;
handlers[ev][i].callback = callback;
handlers[ev][i].data = data;
return;
}
}
fprintf (stderr, "failed to subscribe plugin %s to event %d (too many event handlers)\n", plugin->name, ev);
}
void
plug_ev_unsubscribe (DB_plugin_t *plugin, int ev, db_callback_t callback, uintptr_t data) {
assert (ev < DB_EV_MAX && ev >= 0);
for (int i = 0; i < MAX_HANDLERS; i++) {
if (handlers[ev][i].plugin == plugin) {
handlers[ev][i].plugin = NULL;
handlers[ev][i].callback = NULL;
handlers[ev][i].data = 0;
return;
}
}
}
void
plug_trigger_event (int ev) {
for (int i = 0; i < MAX_HANDLERS; i++) {
if (handlers[ev][i].plugin && !handlers[ev][i].plugin->inactive) {
handlers[ev][i].callback (ev, handlers[ev][i].data);
}
}
}
void
plug_load_all (void) {
char dirname[1024];
snprintf (dirname, 1024, "%s/lib/deadbeef", PREFIX);
struct dirent **namelist = NULL;
int n = scandir (dirname, &namelist, NULL, alphasort);
if (n < 0)
{
if (namelist) {
free (namelist);
}
return; // not a dir or no read access
}
else
{
int i;
for (i = 0; i < n; i++)
{
// no hidden files
if (namelist[i]->d_name[0] != '.')
{
int l = strlen (namelist[i]->d_name);
if (l < 3) {
continue;
}
if (strcasecmp (&namelist[i]->d_name[l-3], ".so")) {
continue;
}
char fullname[1024];
strcpy (fullname, dirname);
strncat (fullname, "/", 1024);
strncat (fullname, namelist[i]->d_name, 1024);
printf ("loading plugin %s\n", namelist[i]->d_name);
void *handle = dlopen (fullname, RTLD_NOW);
if (!handle) {
fprintf (stderr, "dlopen error: %s\n", dlerror ());
continue;
}
namelist[i]->d_name[l-3] = 0;
printf ("module name is %s\n", namelist[i]->d_name);
strcat (namelist[i]->d_name, "_load");
DB_plugin_t *(*plug_load)(DB_functions_t *api) = dlsym (handle, namelist[i]->d_name);
if (!plug_load) {
fprintf (stderr, "dlsym error: %s\n", dlerror ());
dlclose (handle);
continue;
}
DB_plugin_t *plugin_api = plug_load (&deadbeef_api);
if (!plugin_api) {
namelist[i]->d_name[l-3] = 0;
fprintf (stderr, "plugin %s is incompatible with current version of deadbeef, please upgrade the plugin\n");
dlclose (handle);
continue;
}
plugin_t *plug = malloc (sizeof (plugin_t));
memset (plug, 0, sizeof (plugin_t));
plug->plugin = plugin_api;
plug->handle = handle;
plug->next = plugins;
if (plug->plugin->start) {
if (plug->plugin->start () < 0) {
plug->plugin->inactive = 1;
}
}
plugins = plug;
}
free (namelist[i]);
}
free (namelist);
}
}
void
plug_unload_all (void) {
while (plugins) {
plugin_t *next = plugins->next;
if (plugins->plugin->stop) {
plugins->plugin->stop ();
}
dlclose (plugins->handle);
plugins = next;
}
}
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