research.m1stereo.tv/gitweb/ - melted/blob - src/modules/jackrack/plugin.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 <stdio.h>
  27 #include <stdlib.h>
  28 #include <ladspa.h>
  29 #include <dlfcn.h>
  30 #include <ctype.h>
  31
  32 #include <glib.h>
  33
  34 #include "plugin.h"
  35 #include "jack_rack.h"
  36 #include "process.h"
  37
  38 #define CONTROL_FIFO_SIZE   128
  39
  40
  41
  42 /* swap over the jack ports in two plugins */
  43 static void
  44 plugin_swap_aux_ports (plugin_t * plugin, plugin_t * other)
  45 {
  46   guint copy;
  47   jack_port_t ** aux_ports_tmp;
  48
  49   for (copy = 0; copy < plugin->copies; copy++)
  50     {
  51       aux_ports_tmp = other->holders[copy].aux_ports;
  52       other->holders[copy].aux_ports = plugin->holders[copy].aux_ports;
  53       plugin->holders[copy].aux_ports = aux_ports_tmp;
  54     }
  55 }
  56
  57 /** connect up the ladspa instance's input buffers to the previous
  58     plugin's audio memory.  make sure to check that plugin->prev
  59     exists. */
  60 void
  61 plugin_connect_input_ports (plugin_t * plugin, LADSPA_Data ** inputs)
  62 {
  63   gint copy;
  64   unsigned long channel;
  65   unsigned long rack_channel;
  66
  67   if (!plugin || !inputs)
  68     return;
  69
  70   rack_channel = 0;
  71   for (copy = 0; copy < plugin->copies; copy++)
  72     {
  73       for (channel = 0; channel < plugin->desc->channels; channel++)
  74         {
  75           plugin->descriptor->
  76             connect_port (plugin->holders[copy].instance,
  77                           plugin->desc->audio_input_port_indicies[channel],
  78                           inputs[rack_channel]);
  79           rack_channel++;
  80         }
  81     }
  82
  83   plugin->audio_input_memory = inputs;
  84 }
  85
  86 /** connect up a plugin's output ports to its own audio_output_memory output memory */
  87 void
  88 plugin_connect_output_ports (plugin_t * plugin)
  89 {
  90   gint copy;
  91   unsigned long channel;
  92   unsigned long rack_channel = 0;
  93
  94   if (!plugin)
  95     return;
  96
  97
  98   for (copy = 0; copy < plugin->copies; copy++)
  99     {
 100       for (channel = 0; channel < plugin->desc->channels; channel++)
 101         {
 102           plugin->descriptor->
 103             connect_port (plugin->holders[copy].instance,
 104                           plugin->desc->audio_output_port_indicies[channel],
 105                           plugin->audio_output_memory[rack_channel]);
 106           rack_channel++;
 107         }
 108     }
 109 }
 110
 111 void
 112 process_add_plugin (process_info_t * procinfo, plugin_t * plugin)
 113 {
 114
 115   /* sort out list pointers */
 116   plugin->next = NULL;
 117   plugin->prev = procinfo->chain_end;
 118
 119   if (procinfo->chain_end)
 120     procinfo->chain_end->next = plugin;
 121   else
 122     procinfo->chain = plugin;
 123
 124   procinfo->chain_end = plugin;
 125
 126 }
 127
 128
 129 /** remove a plugin from the chain */
 130 plugin_t *
 131 process_remove_plugin (process_info_t * procinfo, plugin_t *plugin)
 132 {
 133   /* sort out chain pointers */
 134   if (plugin->prev)
 135     plugin->prev->next = plugin->next;
 136   else
 137     procinfo->chain = plugin->next;
 138
 139   if (plugin->next)
 140     plugin->next->prev = plugin->prev;
 141   else
 142     procinfo->chain_end = plugin->prev;
 143
 144   /* sort out the aux ports */
 145   if (procinfo->jack_client && plugin->desc->aux_channels > 0)
 146     {
 147       plugin_t * other;
 148
 149       for (other = plugin->next; other; other = other->next)
 150         if (other->desc->id == plugin->desc->id)
 151           plugin_swap_aux_ports (plugin, other);
 152     }
 153
 154   return plugin;
 155 }
 156
 157 /** enable/disable a plugin */
 158 void
 159 process_ablise_plugin (process_info_t * procinfo, plugin_t *plugin, gboolean enable)
 160 {
 161   plugin->enabled = enable;
 162 }
 163
 164 /** enable/disable a plugin */
 165 void
 166 process_ablise_plugin_wet_dry (process_info_t * procinfo, plugin_t *plugin, gboolean enable)
 167 {
 168   plugin->wet_dry_enabled = enable;
 169 }
 170
 171 /** move a plugin up or down one place in the chain */
 172 void
 173 process_move_plugin (process_info_t * procinfo, plugin_t *plugin, gint up)
 174 {
 175   /* other plugins in the chain */
 176   plugin_t *pp = NULL, *p, *n, *nn = NULL;
 177
 178   /* note that we should never recieve an illogical move request
 179      ie, there will always be at least 1 plugin before for an up
 180      request or 1 plugin after for a down request */
 181
 182   /* these are pointers to the plugins surrounding the specified one:
 183      { pp, p, plugin, n, nn } which makes things much clearer than
 184      tptr, tptr2 etc */
 185   p = plugin->prev;
 186   if (p) pp = p->prev;
 187   n = plugin->next;
 188   if (n) nn = n->next;
 189
 190   if (up)
 191     {
 192       if (!p)
 193         return;
 194
 195       if (pp)
 196         pp->next = plugin;
 197       else
 198         procinfo->chain = plugin;
 199
 200       p->next = n;
 201       p->prev = plugin;
 202
 203       plugin->prev = pp;
 204       plugin->next = p;
 205
 206       if (n)
 207         n->prev = p;
 208       else
 209         procinfo->chain_end = p;
 210
 211     }
 212   else
 213     {
 214       if (!n)
 215         return;
 216
 217       if (p)
 218         p->next = n;
 219       else
 220         procinfo->chain = n;
 221
 222       n->prev = p;
 223       n->next = plugin;
 224
 225       plugin->prev = n;
 226       plugin->next = nn;
 227
 228       if (nn)
 229         nn->prev = plugin;
 230       else
 231         procinfo->chain_end = plugin;
 232     }
 233
 234   if (procinfo->jack_client && plugin->desc->aux_channels > 0)
 235     {
 236       plugin_t * other;
 237       other = up ? plugin->next : plugin->prev;
 238
 239       /* swap around the jack ports */
 240       if (other->desc->id == plugin->desc->id)
 241         plugin_swap_aux_ports (plugin, other);
 242     }
 243 }
 244
 245 /** exchange an existing plugin for a newly created one */
 246 plugin_t *
 247 process_change_plugin (process_info_t * procinfo,
 248                        plugin_t *plugin, plugin_t * new_plugin)
 249 {
 250   new_plugin->next = plugin->next;
 251   new_plugin->prev = plugin->prev;
 252
 253   if (plugin->prev)
 254     plugin->prev->next = new_plugin;
 255   else
 256     procinfo->chain = new_plugin;
 257
 258   if (plugin->next)
 259     plugin->next->prev = new_plugin;
 260   else
 261     procinfo->chain_end = new_plugin;
 262
 263   /* sort out the aux ports */
 264   if (procinfo->jack_client && plugin->desc->aux_channels > 0)
 265     {
 266       plugin_t * other;
 267
 268       for (other = plugin->next; other; other = other->next)
 269         if (other->desc->id == plugin->desc->id)
 270           plugin_swap_aux_ports (plugin, other);
 271     }
 272
 273   return plugin;
 274 }
 275
 276
 277 /******************************************
 278  ************* non RT stuff ***************
 279  ******************************************/
 280
 281
 282 static int
 283 plugin_open_plugin (plugin_desc_t * desc,
 284                     void ** dl_handle_ptr,
 285                     const LADSPA_Descriptor ** descriptor_ptr)
 286 {
 287   void * dl_handle;
 288   const char * dlerr;
 289   LADSPA_Descriptor_Function get_descriptor;
 290
 291   /* open the object file */
 292   dl_handle = dlopen (desc->object_file, RTLD_NOW|RTLD_GLOBAL);
 293   if (!dl_handle)
 294     {
 295       fprintf (stderr, "%s: error opening shared object file '%s': %s\n",
 296                __FUNCTION__, desc->object_file, dlerror());
 297       return 1;
 298     }
 299
 300
 301   /* get the get_descriptor function */
 302   dlerror (); /* clear the error report */
 303
 304   get_descriptor = (LADSPA_Descriptor_Function)
 305     dlsym (dl_handle, "ladspa_descriptor");
 306
 307   dlerr = dlerror();
 308   if (dlerr)
 309     {
 310       fprintf (stderr, "%s: error finding descriptor symbol in object file '%s': %s\n",
 311                __FUNCTION__, desc->object_file, dlerr);
 312       dlclose (dl_handle);
 313       return 1;
 314     }
 315
 316   *descriptor_ptr = get_descriptor (desc->index);
 317   *dl_handle_ptr = dl_handle;
 318
 319   return 0;
 320 }
 321
 322 static int
 323 plugin_instantiate (const LADSPA_Descriptor * descriptor,
 324                     unsigned long plugin_index,
 325                     gint copies,
 326                     LADSPA_Handle * instances)
 327 {
 328   gint i;
 329
 330   for (i = 0; i < copies; i++)
 331     {
 332       instances[i] = descriptor->instantiate (descriptor, sample_rate);
 333
 334       if (!instances[i])
 335         {
 336           unsigned long d;
 337
 338           for (d = 0; d < i; d++)
 339             descriptor->cleanup (instances[d]);
 340
 341           return 1;
 342         }
 343     }
 344
 345   return 0;
 346 }
 347
 348 static void
 349 plugin_create_aux_ports (plugin_t * plugin, guint copy, jack_rack_t * jack_rack)
 350 {
 351   plugin_desc_t * desc;
 352 //  plugin_slot_t * slot;
 353   unsigned long aux_channel = 1;
 354   unsigned long plugin_index = 1;
 355   unsigned long i;
 356   char port_name[64];
 357   char * plugin_name;
 358   char * ptr;
 359 //  GList * list;
 360   ladspa_holder_t * holder;
 361
 362   desc = plugin->desc;
 363   holder = plugin->holders + copy;
 364
 365   holder->aux_ports = g_malloc (sizeof (jack_port_t *) * desc->aux_channels);
 366
 367   /* make the plugin name jack worthy */
 368   ptr = plugin_name = g_strndup (plugin->desc->name, 7);
 369   while (*ptr != '\0')
 370     {
 371       if (*ptr == ' ')
 372         *ptr = '_';
 373       else
 374         *ptr = tolower (*ptr);
 375
 376       ptr++;
 377     }
 378
 379 /*
 380   for (list = jack_rack->slots; list; list = g_list_next (list))
 381     {
 382       slot = (plugin_slot_t *) list->data;
 383
 384       if (slot->plugin->desc->id == plugin->desc->id)
 385         plugin_index++;
 386     }
 387 */
 388
 389   for (i = 0; i < desc->aux_channels; i++, aux_channel++)
 390     {
 391       sprintf (port_name, "%s_%ld-%d_%c%ld",
 392                plugin_name,
 393                plugin_index,
 394                copy + 1,
 395                desc->aux_are_input ? 'i' : 'o',
 396                aux_channel);
 397
 398       holder->aux_ports[i] =
 399         jack_port_register (jack_rack->procinfo->jack_client,
 400                             port_name,
 401                             JACK_DEFAULT_AUDIO_TYPE,
 402                             desc->aux_are_input ? JackPortIsInput : JackPortIsOutput,
 403                             0);
 404
 405       if (!holder->aux_ports[i])
 406         {
 407           fprintf (stderr, "Could not register jack port '%s'; aborting\n", port_name);
 408           abort ();
 409         }
 410     }
 411
 412   g_free (plugin_name);
 413 }
 414
 415 static LADSPA_Data unused_control_port_output;
 416
 417 static void
 418 plugin_init_holder (plugin_t * plugin,
 419                     guint copy,
 420                     LADSPA_Handle instance,
 421                     jack_rack_t * jack_rack)
 422 {
 423   unsigned long i;
 424   plugin_desc_t * desc;
 425   ladspa_holder_t * holder;
 426
 427   desc = plugin->desc;
 428   holder = plugin->holders + copy;
 429
 430   holder->instance = instance;
 431
 432   if (desc->control_port_count > 0)
 433     {
 434       holder->ui_control_fifos    = g_malloc (sizeof (lff_t) * desc->control_port_count);
 435       holder->control_memory = g_malloc (sizeof (LADSPA_Data) * desc->control_port_count);
 436     }
 437   else
 438     {
 439       holder->ui_control_fifos  = NULL;
 440       holder->control_memory = NULL;
 441     }
 442
 443   for (i = 0; i < desc->control_port_count; i++)
 444     {
 445       lff_init (holder->ui_control_fifos + i, CONTROL_FIFO_SIZE, sizeof (LADSPA_Data));
 446       holder->control_memory[i] =
 447         plugin_desc_get_default_control_value (desc, desc->control_port_indicies[i], sample_rate);
 448
 449       plugin->descriptor->
 450         connect_port (instance, desc->control_port_indicies[i], holder->control_memory + i);
 451     }
 452
 453   for (i = 0; i < desc->port_count; i++)
 454     {
 455       if (!LADSPA_IS_PORT_CONTROL (desc->port_descriptors[i]))
 456         continue;
 457
 458       if (LADSPA_IS_PORT_OUTPUT (desc->port_descriptors[i]))
 459         plugin->descriptor-> connect_port (instance, i, &unused_control_port_output);
 460     }
 461
 462   if (jack_rack->procinfo->jack_client && plugin->desc->aux_channels > 0)
 463     plugin_create_aux_ports (plugin, copy, jack_rack);
 464
 465   if (plugin->descriptor->activate)
 466     plugin->descriptor->activate (instance);
 467 }
 468
 469
 470 plugin_t *
 471 plugin_new (plugin_desc_t * desc, jack_rack_t * jack_rack)
 472 {
 473   void * dl_handle;
 474   const LADSPA_Descriptor * descriptor;
 475   LADSPA_Handle * instances;
 476   gint copies;
 477   unsigned long i;
 478   int err;
 479   plugin_t * plugin;
 480
 481   /* open the plugin */
 482   err = plugin_open_plugin (desc, &dl_handle, &descriptor);
 483   if (err)
 484     return NULL;
 485
 486   /* create the instances */
 487   copies = plugin_desc_get_copies (desc, jack_rack->channels);
 488   instances = g_malloc (sizeof (LADSPA_Handle) * copies);
 489
 490   err = plugin_instantiate (descriptor, desc->index, copies, instances);
 491   if (err)
 492     {
 493       g_free (instances);
 494       dlclose (dl_handle);
 495       return NULL;
 496     }
 497
 498
 499   plugin = g_malloc (sizeof (plugin_t));
 500
 501   plugin->descriptor = descriptor;
 502   plugin->dl_handle = dl_handle;
 503   plugin->desc = desc;
 504   plugin->copies = copies;
 505   plugin->enabled = FALSE;
 506   plugin->next = NULL;
 507   plugin->prev = NULL;
 508   plugin->wet_dry_enabled = FALSE;
 509   plugin->jack_rack = jack_rack;
 510
 511   /* create audio memory and wet/dry stuff */
 512   plugin->audio_output_memory   = g_malloc (sizeof (LADSPA_Data *) * jack_rack->channels);
 513   plugin->wet_dry_fifos  = g_malloc (sizeof (lff_t) * jack_rack->channels);
 514   plugin->wet_dry_values = g_malloc (sizeof (LADSPA_Data) * jack_rack->channels);
 515
 516   for (i = 0; i < jack_rack->channels; i++)
 517     {
 518       plugin->audio_output_memory[i] = g_malloc (sizeof (LADSPA_Data) * buffer_size);
 519       lff_init (plugin->wet_dry_fifos + i, CONTROL_FIFO_SIZE, sizeof (LADSPA_Data));
 520       plugin->wet_dry_values[i] = 1.0;
 521     }
 522
 523   /* create holders and fill them out */
 524   plugin->holders = g_malloc (sizeof (ladspa_holder_t) * copies);
 525   for (i = 0; i < copies; i++)
 526     plugin_init_holder (plugin, i, instances[i], jack_rack);
 527
 528   return plugin;
 529 }
 530
 531
 532 void
 533 plugin_destroy (plugin_t * plugin)
 534 {
 535   unsigned long i, j;
 536   int err;
 537
 538   /* destroy holders */
 539   for (i = 0; i < plugin->copies; i++)
 540     {
 541       if (plugin->descriptor->deactivate)
 542         plugin->descriptor->deactivate (plugin->holders[i].instance);
 543
 544 /*      if (plugin->descriptor->cleanup)
 545         plugin->descriptor->cleanup (plugin->holders[i].instance); */
 546
 547       if (plugin->desc->control_port_count > 0)
 548         {
 549           for (j = 0; j < plugin->desc->control_port_count; j++)
 550             {
 551               lff_free (plugin->holders[i].ui_control_fifos + j);
 552             }
 553           g_free (plugin->holders[i].ui_control_fifos);
 554           g_free (plugin->holders[i].control_memory);
 555         }
 556
 557       /* aux ports */
 558       if (plugin->jack_rack->procinfo->jack_client && plugin->desc->aux_channels > 0)
 559         {
 560           for (j = 0; j < plugin->desc->aux_channels; j++)
 561             {
 562               err = jack_port_unregister (plugin->jack_rack->procinfo->jack_client,
 563                                           plugin->holders[i].aux_ports[j]);
 564
 565               if (err)
 566                 fprintf (stderr, "%s: could not unregister jack port\n", __FUNCTION__);
 567             }
 568
 569           g_free (plugin->holders[i].aux_ports);
 570         }
 571     }
 572
 573   g_free (plugin->holders);
 574
 575   for (i = 0; i < plugin->jack_rack->channels; i++)
 576     {
 577       g_free (plugin->audio_output_memory[i]);
 578       lff_free (plugin->wet_dry_fifos + i);
 579     }
 580
 581   g_free (plugin->audio_output_memory);
 582   g_free (plugin->wet_dry_fifos);
 583   g_free (plugin->wet_dry_values);
 584
 585   err = dlclose (plugin->dl_handle);
 586   if (err)
 587     {
 588       fprintf (stderr, "%s: error closing shared object '%s': %s\n",
 589                __FUNCTION__, plugin->desc->object_file, dlerror ());
 590     }
 591
 592   g_free (plugin);
 593 }
 594
 595
 596 /* EOF */