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322 lines
7.8 KiB
322 lines
7.8 KiB
/*
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* JACK Rack
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*
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* Original:
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* Copyright (C) Robert Ham 2002, 2003 (node@users.sourceforge.net)
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*
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* Modification for MLT:
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* Copyright (C) 2004 Ushodaya Enterprises Limited
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* Author: Dan Dennedy <dan@dennedy.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <dirent.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <dlfcn.h>
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#include <math.h>
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#include <strings.h>
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#include <ctype.h>
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#include <ladspa.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "plugin_mgr.h"
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#include "plugin_desc.h"
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static gboolean
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plugin_is_valid (const LADSPA_Descriptor * descriptor)
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{
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unsigned long i;
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unsigned long icount = 0;
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unsigned long ocount = 0;
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for (i = 0; i < descriptor->PortCount; i++)
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{
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if (!LADSPA_IS_PORT_AUDIO (descriptor->PortDescriptors[i]))
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continue;
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if (LADSPA_IS_PORT_INPUT (descriptor->PortDescriptors[i]))
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icount++;
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else
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ocount++;
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}
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if (icount == 0 || ocount == 0)
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return FALSE;
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return TRUE;
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}
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static void
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plugin_mgr_get_object_file_plugins (plugin_mgr_t * plugin_mgr, const char * filename)
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{
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const char * dlerr;
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void * dl_handle;
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LADSPA_Descriptor_Function get_descriptor;
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const LADSPA_Descriptor * descriptor;
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unsigned long plugin_index;
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plugin_desc_t * desc, * other_desc = NULL;
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GSList * list;
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gboolean exists;
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int err;
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/* open the object file */
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dl_handle = dlopen (filename, RTLD_NOW|RTLD_GLOBAL);
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if (!dl_handle)
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{
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fprintf (stderr, "%s: error opening shared object file '%s': %s\n",
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__FUNCTION__, filename, dlerror());
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return;
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}
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/* get the get_descriptor function */
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dlerror (); /* clear the error report */
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get_descriptor = (LADSPA_Descriptor_Function)
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dlsym (dl_handle, "ladspa_descriptor");
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dlerr = dlerror();
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if (dlerr) {
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fprintf (stderr, "%s: error finding ladspa_descriptor symbol in object file '%s': %s\n",
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__FUNCTION__, filename, dlerr);
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dlclose (dl_handle);
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return;
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}
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plugin_index = 0;
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while ( (descriptor = get_descriptor (plugin_index)) )
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{
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if (!plugin_is_valid (descriptor))
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{
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plugin_index++;
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continue;
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}
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/* check it doesn't already exist */
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exists = FALSE;
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for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
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{
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other_desc = (plugin_desc_t *) list->data;
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if (other_desc->id == descriptor->UniqueID)
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{
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exists = TRUE;
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break;
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}
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}
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if (exists)
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{
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printf ("Plugin %ld exists in both '%s' and '%s'; using version in '%s'\n",
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descriptor->UniqueID, other_desc->object_file, filename, other_desc->object_file);
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plugin_index++;
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continue;
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}
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desc = plugin_desc_new_with_descriptor (filename, plugin_index, descriptor);
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plugin_mgr->all_plugins = g_slist_append (plugin_mgr->all_plugins, desc);
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plugin_index++;
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plugin_mgr->plugin_count++;
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/* print in the splash screen */
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/* printf ("Loaded plugin '%s'\n", desc->name); */
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}
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err = dlclose (dl_handle);
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if (err)
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{
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fprintf (stderr, "%s: error closing object file '%s': %s\n",
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__FUNCTION__, filename, dlerror ());
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}
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}
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static void
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plugin_mgr_get_dir_plugins (plugin_mgr_t * plugin_mgr, const char * dir)
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{
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DIR * dir_stream;
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struct dirent * dir_entry;
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char * file_name;
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int err;
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size_t dirlen;
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dir_stream = opendir (dir);
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if (!dir_stream)
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{
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/* fprintf (stderr, "%s: error opening directory '%s': %s\n",
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__FUNCTION__, dir, strerror (errno)); */
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return;
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}
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dirlen = strlen (dir);
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while ( (dir_entry = readdir (dir_stream)) )
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{
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struct stat info;
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if (strcmp (dir_entry->d_name, ".") == 0 ||
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strcmp (dir_entry->d_name, "..") == 0)
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continue;
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file_name = g_malloc (dirlen + 1 + strlen (dir_entry->d_name) + 1);
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strcpy (file_name, dir);
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if (file_name[dirlen - 1] == '/')
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strcpy (file_name + dirlen, dir_entry->d_name);
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else
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{
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file_name[dirlen] = '/';
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strcpy (file_name + dirlen + 1, dir_entry->d_name);
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}
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stat (file_name, &info);
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if (S_ISDIR (info.st_mode))
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plugin_mgr_get_dir_plugins (plugin_mgr, file_name);
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else
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plugin_mgr_get_object_file_plugins (plugin_mgr, file_name);
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g_free (file_name);
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}
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err = closedir (dir_stream);
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if (err)
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fprintf (stderr, "%s: error closing directory '%s': %s\n",
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__FUNCTION__, dir, strerror (errno));
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}
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static void
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plugin_mgr_get_path_plugins (plugin_mgr_t * plugin_mgr)
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{
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char * ladspa_path, * dir;
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ladspa_path = g_strdup (getenv ("LADSPA_PATH"));
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if (!ladspa_path)
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ladspa_path = g_strdup ("/usr/local/lib/ladspa:/usr/lib/ladspa");
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dir = strtok (ladspa_path, ":");
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do
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plugin_mgr_get_dir_plugins (plugin_mgr, dir);
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while ((dir = strtok (NULL, ":")));
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g_free (ladspa_path);
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}
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static gint
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plugin_mgr_sort (gconstpointer a, gconstpointer b)
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{
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const plugin_desc_t * da;
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const plugin_desc_t * db;
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da = (const plugin_desc_t *) a;
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db = (const plugin_desc_t *) b;
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return strcasecmp (da->name, db->name);
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}
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plugin_mgr_t *
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plugin_mgr_new ()
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{
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plugin_mgr_t * pm;
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pm = g_malloc (sizeof (plugin_mgr_t));
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pm->all_plugins = NULL;
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pm->plugins = NULL;
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pm->plugin_count = 0;
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plugin_mgr_get_path_plugins (pm);
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if (!pm->all_plugins)
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{
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fprintf (stderr, "No LADSPA plugins were found!\n\nCheck your LADSPA_PATH environment variable.\n");
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abort ();
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}
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pm->all_plugins = g_slist_sort (pm->all_plugins, plugin_mgr_sort);
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return pm;
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}
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void
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plugin_mgr_destroy (plugin_mgr_t * plugin_mgr)
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{
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GSList * list;
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for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
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plugin_desc_destroy ((plugin_desc_t *) list->data);
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g_slist_free (plugin_mgr->plugins);
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g_slist_free (plugin_mgr->all_plugins);
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free (plugin_mgr);
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}
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void
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plugin_mgr_set_plugins (plugin_mgr_t * plugin_mgr, unsigned long rack_channels)
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{
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GSList * list;
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plugin_desc_t * desc;
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/* clear the current plugins */
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g_slist_free (plugin_mgr->plugins);
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plugin_mgr->plugins = NULL;
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for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
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{
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desc = (plugin_desc_t *) list->data;
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if (plugin_desc_get_copies (desc, rack_channels) != 0)
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plugin_mgr->plugins = g_slist_append (plugin_mgr->plugins, desc);
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}
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}
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static plugin_desc_t *
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plugin_mgr_find_desc (plugin_mgr_t * plugin_mgr, GSList * plugins, unsigned long id)
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{
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GSList * list;
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plugin_desc_t * desc;
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for (list = plugins; list; list = g_slist_next (list))
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{
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desc = (plugin_desc_t *) list->data;
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if (desc->id == id)
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return desc;
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}
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return NULL;
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}
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plugin_desc_t *
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plugin_mgr_get_desc (plugin_mgr_t * plugin_mgr, unsigned long id)
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{
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return plugin_mgr_find_desc (plugin_mgr, plugin_mgr->plugins, id);
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}
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plugin_desc_t *
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plugin_mgr_get_any_desc (plugin_mgr_t * plugin_mgr, unsigned long id)
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{
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return plugin_mgr_find_desc (plugin_mgr, plugin_mgr->all_plugins, id);
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}
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/* EOF */
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