research.m1stereo.tv/gitweb/ - melted/blob - src/modules/jackrack/plugin_mgr.c

   1 /*
   2  * JACK Rack
   3  *
   4  * Original:
   5  * Copyright (C) Robert Ham 2002, 2003 (node@users.sourceforge.net)
   6  *
   7  * Modification for MLT:
   8  * Copyright (C) 2004 Ushodaya Enterprises Limited
   9  * Author: Dan Dennedy <dan@dennedy.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <dirent.h>
  30 #include <errno.h>
  31 #include <sys/stat.h>
  32 #include <dlfcn.h>
  33 #include <math.h>
  34 #include <strings.h>
  35 #include <ctype.h>
  36 #include <ladspa.h>
  37 #include <sys/types.h>
  38 #include <unistd.h>
  39
  40 #include "plugin_mgr.h"
  41 #include "plugin_desc.h"
  42
  43
  44 static gboolean
  45 plugin_is_valid (const LADSPA_Descriptor * descriptor)
  46 {
  47   unsigned long i;
  48   unsigned long icount = 0;
  49   unsigned long ocount = 0;
  50
  51   for (i = 0; i < descriptor->PortCount; i++)
  52     {
  53       if (!LADSPA_IS_PORT_AUDIO (descriptor->PortDescriptors[i]))
  54         continue;
  55
  56       if (LADSPA_IS_PORT_INPUT (descriptor->PortDescriptors[i]))
  57         icount++;
  58       else
  59         ocount++;
  60     }
  61
  62   if (icount == 0 || ocount == 0)
  63     return FALSE;
  64
  65   return TRUE;
  66 }
  67
  68 static void
  69 plugin_mgr_get_object_file_plugins (plugin_mgr_t * plugin_mgr, const char * filename)
  70 {
  71   const char * dlerr;
  72   void * dl_handle;
  73   LADSPA_Descriptor_Function get_descriptor;
  74   const LADSPA_Descriptor * descriptor;
  75   unsigned long plugin_index;
  76   plugin_desc_t * desc, * other_desc = NULL;
  77   GSList * list;
  78   gboolean exists;
  79   int err;
  80
  81   /* open the object file */
  82   dl_handle = dlopen (filename, RTLD_NOW|RTLD_GLOBAL);
  83   if (!dl_handle)
  84     {
  85       fprintf (stderr, "%s: error opening shared object file '%s': %s\n",
  86                __FUNCTION__, filename, dlerror());
  87       return;
  88     }
  89
  90
  91   /* get the get_descriptor function */
  92   dlerror (); /* clear the error report */
  93
  94   get_descriptor = (LADSPA_Descriptor_Function)
  95     dlsym (dl_handle, "ladspa_descriptor");
  96
  97   dlerr = dlerror();
  98   if (dlerr) {
  99     fprintf (stderr, "%s: error finding ladspa_descriptor symbol in object file '%s': %s\n",
 100              __FUNCTION__, filename, dlerr);
 101     dlclose (dl_handle);
 102     return;
 103   }
 104
 105   plugin_index = 0;
 106   while ( (descriptor = get_descriptor (plugin_index)) )
 107     {
 108       if (!plugin_is_valid (descriptor))
 109         {
 110           plugin_index++;
 111           continue;
 112         }
 113
 114
 115       /* check it doesn't already exist */
 116       exists = FALSE;
 117       for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
 118         {
 119           other_desc = (plugin_desc_t *) list->data;
 120
 121           if (other_desc->id == descriptor->UniqueID)
 122             {
 123               exists = TRUE;
 124               break;
 125             }
 126         }
 127
 128       if (exists)
 129         {
 130           printf ("Plugin %ld exists in both '%s' and '%s'; using version in '%s'\n",
 131                   descriptor->UniqueID, other_desc->object_file, filename, other_desc->object_file);
 132           plugin_index++;
 133           continue;
 134         }
 135
 136
 137       desc = plugin_desc_new_with_descriptor (filename, plugin_index, descriptor);
 138       plugin_mgr->all_plugins = g_slist_append (plugin_mgr->all_plugins, desc);
 139       plugin_index++;
 140       plugin_mgr->plugin_count++;
 141
 142       /* print in the splash screen */
 143       /* printf ("Loaded plugin '%s'\n", desc->name); */
 144     }
 145
 146   err = dlclose (dl_handle);
 147   if (err)
 148     {
 149       fprintf (stderr, "%s: error closing object file '%s': %s\n",
 150                __FUNCTION__, filename, dlerror ());
 151     }
 152 }
 153
 154 static void
 155 plugin_mgr_get_dir_plugins (plugin_mgr_t * plugin_mgr, const char * dir)
 156 {
 157   DIR * dir_stream;
 158   struct dirent * dir_entry;
 159   char * file_name;
 160   int err;
 161   size_t dirlen;
 162
 163   dir_stream = opendir (dir);
 164   if (!dir_stream)
 165     {
 166 /*      fprintf (stderr, "%s: error opening directory '%s': %s\n",
 167                __FUNCTION__, dir, strerror (errno)); */
 168       return;
 169     }
 170
 171   dirlen = strlen (dir);
 172
 173   while ( (dir_entry = readdir (dir_stream)) )
 174     {
 175       struct stat info;
 176
 177       if (strcmp (dir_entry->d_name, ".") == 0 ||
 178           strcmp (dir_entry->d_name, "..") == 0)
 179         continue;
 180
 181       file_name = g_malloc (dirlen + 1 + strlen (dir_entry->d_name) + 1);
 182
 183       strcpy (file_name, dir);
 184       if (file_name[dirlen - 1] == '/')
 185         strcpy (file_name + dirlen, dir_entry->d_name);
 186       else
 187         {
 188           file_name[dirlen] = '/';
 189           strcpy (file_name + dirlen + 1, dir_entry->d_name);
 190         }
 191
 192       stat (file_name, &info);
 193       if (S_ISDIR (info.st_mode))
 194         plugin_mgr_get_dir_plugins (plugin_mgr, file_name);
 195       else
 196         plugin_mgr_get_object_file_plugins (plugin_mgr, file_name);
 197
 198       g_free (file_name);
 199     }
 200
 201   err = closedir (dir_stream);
 202   if (err)
 203     fprintf (stderr, "%s: error closing directory '%s': %s\n",
 204              __FUNCTION__, dir, strerror (errno));
 205 }
 206
 207 static void
 208 plugin_mgr_get_path_plugins (plugin_mgr_t * plugin_mgr)
 209 {
 210   char * ladspa_path, * dir;
 211
 212   ladspa_path = g_strdup (getenv ("LADSPA_PATH"));
 213   if (!ladspa_path)
 214     ladspa_path = g_strdup ("/usr/local/lib/ladspa:/usr/lib/ladspa:/usr/lib64/ladspa");
 215
 216   dir = strtok (ladspa_path, ":");
 217   do
 218     plugin_mgr_get_dir_plugins (plugin_mgr, dir);
 219   while ((dir = strtok (NULL, ":")));
 220
 221   g_free (ladspa_path);
 222 }
 223
 224 static gint
 225 plugin_mgr_sort (gconstpointer a, gconstpointer b)
 226 {
 227   const plugin_desc_t * da;
 228   const plugin_desc_t * db;
 229   da = (const plugin_desc_t *) a;
 230   db = (const plugin_desc_t *) b;
 231
 232   return strcasecmp (da->name, db->name);
 233 }
 234
 235 plugin_mgr_t *
 236 plugin_mgr_new ()
 237 {
 238   plugin_mgr_t * pm;
 239
 240   pm = g_malloc (sizeof (plugin_mgr_t));
 241   pm->all_plugins = NULL;
 242   pm->plugins = NULL;
 243   pm->plugin_count = 0;
 244
 245   plugin_mgr_get_path_plugins (pm);
 246
 247   if (!pm->all_plugins)
 248     {
 249       fprintf (stderr, "No LADSPA plugins were found!\n\nCheck your LADSPA_PATH environment variable.\n");
 250       abort ();
 251     }
 252
 253   pm->all_plugins = g_slist_sort (pm->all_plugins, plugin_mgr_sort);
 254
 255   return pm;
 256 }
 257
 258 void
 259 plugin_mgr_destroy (plugin_mgr_t * plugin_mgr)
 260 {
 261   GSList * list;
 262
 263   for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
 264     plugin_desc_destroy ((plugin_desc_t *) list->data);
 265
 266   g_slist_free (plugin_mgr->plugins);
 267   g_slist_free (plugin_mgr->all_plugins);
 268   free (plugin_mgr);
 269 }
 270
 271
 272 void
 273 plugin_mgr_set_plugins (plugin_mgr_t * plugin_mgr, unsigned long rack_channels)
 274 {
 275   GSList * list;
 276   plugin_desc_t * desc;
 277
 278   /* clear the current plugins */
 279   g_slist_free (plugin_mgr->plugins);
 280   plugin_mgr->plugins = NULL;
 281
 282   for (list = plugin_mgr->all_plugins; list; list = g_slist_next (list))
 283     {
 284       desc = (plugin_desc_t *) list->data;
 285
 286       if (plugin_desc_get_copies (desc, rack_channels) != 0)
 287         plugin_mgr->plugins = g_slist_append (plugin_mgr->plugins, desc);
 288     }
 289 }
 290
 291 static plugin_desc_t *
 292 plugin_mgr_find_desc (plugin_mgr_t * plugin_mgr, GSList * plugins, unsigned long id)
 293 {
 294   GSList * list;
 295   plugin_desc_t * desc;
 296
 297   for (list = plugins; list; list = g_slist_next (list))
 298     {
 299       desc = (plugin_desc_t *) list->data;
 300
 301       if (desc->id == id)
 302         return desc;
 303     }
 304
 305   return NULL;
 306 }
 307
 308 plugin_desc_t *
 309 plugin_mgr_get_desc (plugin_mgr_t * plugin_mgr, unsigned long id)
 310 {
 311   return plugin_mgr_find_desc (plugin_mgr, plugin_mgr->plugins, id);
 312 }
 313
 314 plugin_desc_t *
 315 plugin_mgr_get_any_desc (plugin_mgr_t * plugin_mgr, unsigned long id)
 316 {
 317   return plugin_mgr_find_desc (plugin_mgr, plugin_mgr->all_plugins, id);
 318 }
 319
 320
 321 /* EOF */