2 Copyright (C) 2012 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include <glib/gstdio.h>
34 #include <glibmm/miscutils.h>
35 #include <glibmm/fileutils.h>
37 #include "ardour/linux_vst_support.h"
38 #include "pbd/error.h"
42 /***********************************************************/
43 /* VSTFX - A set of modules for managing linux VST plugins */
44 /* vstfx.cc, vstfxwin.cc and vstfxinfofile.cc */
45 /***********************************************************/
47 /*Simple error handler stuff for VSTFX*/
49 void vstfx_error (const char *fmt, ...)
55 vsnprintf (buffer, sizeof(buffer), fmt, ap);
56 vstfx_error_callback (buffer);
60 /*default error handler callback*/
62 void default_vstfx_error_callback (const char *desc)
64 PBD::error << desc << endmsg;
67 void (*vstfx_error_callback)(const char *desc) = &default_vstfx_error_callback;
71 /*Create and return a pointer to a new VSTFX handle*/
76 VSTHandle* vstfx = (VSTHandle *) calloc (1, sizeof (VSTHandle));
80 /*Create and return a pointer to a new vstfx instance*/
85 VSTState* vstfx = (VSTState *) calloc (1, sizeof (VSTState));
89 pthread_mutex_init (&vstfx->lock, 0);
90 pthread_cond_init (&vstfx->window_status_change, 0);
91 pthread_cond_init (&vstfx->plugin_dispatcher_called, 0);
92 pthread_cond_init (&vstfx->window_created, 0);
96 vstfx->want_program = -1;
97 vstfx->want_chunk = 0;
98 vstfx->n_pending_keys = 0;
99 vstfx->has_editor = 0;
100 vstfx->program_set_without_editor = 0;
101 vstfx->linux_window = 0;
102 vstfx->linux_plugin_ui_window = 0;
103 vstfx->eventProc = 0;
104 vstfx->extra_data = 0;
105 vstfx->want_resize = 0;
110 /*This loads the plugin shared library*/
112 void* vstfx_load_vst_library(const char* path)
121 /*Try and load the shared library pointed to by the path -
122 NOTE: You have to give RTLD_LAZY or RTLD_NOW to dlopen or
123 you get some occasional failures to load - dlerror reports
126 if ((dll = dlopen (path, RTLD_LOCAL | RTLD_LAZY)) != 0) {
130 if (Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
131 PBD::error << string_compose (_("Could not open existing LXVST plugin: %1"), dlerror()) << endmsg;
135 /*We didn't find the library so try and get the path specified in the
136 env variable LXVST_PATH*/
138 envdup = getenv ("LXVST_PATH");
140 /*Path not specified - not much more we can do*/
145 /*Copy the path into envdup*/
147 envdup = strdup (envdup);
154 /*Try all the possibilities in the path - deliminated by : */
156 lxvst_path = strtok (envdup, ":");
158 while (lxvst_path != 0)
160 vstfx_error ("\"%s\"", lxvst_path);
161 len1 = strlen(lxvst_path);
163 full_path = (char*)malloc(len1 + 1 + len2 + 1);
164 memcpy(full_path, lxvst_path, len1);
165 full_path[len1] = '/';
166 memcpy(full_path + len1 + 1, path, len2);
167 full_path[len1 + 1 + len2] = '\0';
169 /*Try and load the library*/
171 if ((dll = dlopen(full_path, RTLD_LOCAL | RTLD_LAZY)) != 0)
179 lxvst_path = strtok (0, ":");
189 /*This loads up a plugin, given the path to its .so file and
190 finds its main entry point etc*/
193 vstfx_load (const char *path)
199 /*Create a new handle we can use to reference the plugin*/
201 fhandle = vstfx_handle_new();
203 /*See if we have .so appended to the path - if not we need to make sure it is added*/
205 if (strstr (path, ".so") == 0)
208 /*Append the .so to the path - Make sure the path has enough space*/
210 buf = (char *)malloc(strlen(path) + 4); //The .so and a terminating zero
212 sprintf (buf, "%s.so", path);
214 fhandle->nameptr = strdup (path);
219 /*We already have .so appened to the filename*/
223 fhandle->nameptr = strdup (path);
226 /*Use basename to shorten the path and then strip off the .so - the old VST problem,
227 we don't know anything about its name until we load and instantiate the plugin
228 which we don't want to do at this point*/
230 for(i=0; i < (int)strlen(fhandle->nameptr); i++)
232 if(fhandle->nameptr[i] == '.')
233 fhandle->nameptr[i] = 0;
237 fhandle->name = basename (fhandle->nameptr);
239 /*call load_vstfx_library to actually load the .so into memory*/
241 if ((fhandle->dll = vstfx_load_vst_library (buf)) == 0)
243 vstfx_unload (fhandle);
250 /*Find the main entry point into the plugin*/
252 if ((fhandle->main_entry = (main_entry_t) dlsym(fhandle->dll, "main")) == 0)
254 /*If it can't be found, unload the plugin and return a 0 handle*/
256 vstfx_unload (fhandle);
265 /*return the handle of the plugin*/
270 /*This unloads a plugin*/
273 vstfx_unload (VSTHandle* fhandle)
275 if (fhandle->plugincnt)
277 /*Still have plugin instances - can't unload the library
278 - actually dlclose keeps an instance count anyway*/
283 /*Valid plugin loaded?*/
287 dlclose(fhandle->dll);
291 if (fhandle->nameptr)
293 free (fhandle->nameptr);
297 /*Don't need the plugin handle any more*/
303 /*This instantiates a plugin*/
306 vstfx_instantiate (VSTHandle* fhandle, audioMasterCallback amc, void* userptr)
308 VSTState* vstfx = vstfx_new ();
312 vstfx_error( "** ERROR ** VSTFX : The handle was 0\n" );
316 if ((vstfx->plugin = fhandle->main_entry (amc)) == 0)
318 vstfx_error ("** ERROR ** VSTFX : %s could not be instantiated :(\n", fhandle->name);
323 vstfx->handle = fhandle;
324 vstfx->plugin->user = userptr;
326 if (vstfx->plugin->magic != kEffectMagic)
328 vstfx_error ("** ERROR ** VSTFX : %s is not a VST plugin\n", fhandle->name);
333 vstfx->plugin->dispatcher (vstfx->plugin, effOpen, 0, 0, 0, 0);
335 /*May or May not need to 'switch the plugin on' here - unlikely
336 since FST doesn't and most plugins start up 'On' by default - I think this is the least of our worries*/
338 //vstfx->plugin->dispatcher (vstfx->plugin, effMainsChanged, 0, 1, 0, 0);
340 vstfx->vst_version = vstfx->plugin->dispatcher (vstfx->plugin, effGetVstVersion, 0, 0, 0, 0);
342 vstfx->handle->plugincnt++;
348 /*Close a vstfx instance*/
350 void vstfx_close (VSTState* vstfx)
352 vstfx_destroy_editor(vstfx);
356 vstfx->plugin->dispatcher (vstfx->plugin, effMainsChanged, 0, 0, 0, 0);
358 /*Calling dispatcher with effClose will cause the plugin's destructor to
359 be called, which will also remove the editor if it exists*/
361 vstfx->plugin->dispatcher (vstfx->plugin, effClose, 0, 0, 0, 0);
364 if (vstfx->handle->plugincnt)
365 vstfx->handle->plugincnt--;
367 /*vstfx_unload will unload the dll if the instance count allows -
368 we need to do this because some plugins keep their own instance count
369 and (JUCE) manages the plugin UI in its own thread. When the plugins
370 internal instance count reaches zero, JUCE stops the UI thread and won't
371 restart it until the next time the library is loaded. If we don't unload
372 the lib JUCE will never restart*/
375 if (vstfx->handle->plugincnt)
380 /*Valid plugin loaded - so we can unload it and 0 the pointer
381 to it. We can't free the handle here because we don't know what else
382 might need it. It should be / is freed when the plugin is deleted*/
384 if (vstfx->handle->dll)
386 dlclose(vstfx->handle->dll); //dlclose keeps its own reference count
387 vstfx->handle->dll = 0;
393 vstfx_save_state (VSTState* vstfx, char * filename)
395 FILE* f = g_fopen (filename, "wb");
399 int numParams = vstfx->plugin->numParams;
401 char productString[64];
403 char vendorString[64];
408 fprintf(f, "<plugin_state>\n");
410 success = vstfx_call_dispatcher(vstfx, effGetProductString, 0, 0, productString, 0);
414 fprintf (f, " <check field=\"productString\" value=\"%s\"/>\n", productString);
418 printf ("No product string\n");
421 success = vstfx_call_dispatcher(vstfx, effGetEffectName, 0, 0, effectName, 0);
425 fprintf (f, " <check field=\"effectName\" value=\"%s\"/>\n", effectName);
426 printf ("Effect name: %s\n", effectName);
430 printf ("No effect name\n");
433 success = vstfx_call_dispatcher(vstfx, effGetVendorString, 0, 0, vendorString, 0);
437 fprintf (f, " <check field=\"vendorString\" value=\"%s\"/>\n", vendorString);
438 printf ("Vendor string: %s\n", vendorString);
442 printf ("No vendor string\n");
446 if(vstfx->plugin->flags & 32 )
451 for(i=0; i < numParams; i++)
455 pthread_mutex_lock( &vstfx->lock );
456 val = vstfx->plugin->getParameter(vstfx->plugin, i );
457 pthread_mutex_unlock( &vstfx->lock );
458 fprintf( f, " <param index=\"%d\" value=\"%f\"/>\n", i, val );
461 if(vstfx->plugin->flags & 32 )
463 printf( "getting chunk...\n" );
465 bytelen = vstfx_call_dispatcher(vstfx, 23, 0, 0, &chunk, 0 );
466 printf( "got tha chunk..\n" );
471 printf( "Chunke len < 0 !!! Not saving chunk.\n" );
475 //char *encoded = g_base64_encode( chunk, bytelen );
476 //fprintf( f, " <chunk size=\"%d\">\n %s\n </chunk>\n", bytelen, encoded );
482 fprintf( f, "</plugin_state>\n" );
487 printf ("Could not open state file\n");
493 /*Set up a call to the plugins 'dispatcher' function*/
495 int vstfx_call_dispatcher (VSTState* vstfx, int opcode, int index, int val, void *ptr, float opt)
497 pthread_mutex_lock (&vstfx->lock);
499 /*Set up the opcode and parameters*/
501 vstfx->dispatcher_opcode = opcode;
502 vstfx->dispatcher_index = index;
503 vstfx->dispatcher_val = val;
504 vstfx->dispatcher_ptr = ptr;
505 vstfx->dispatcher_opt = opt;
507 /*Signal that we want the call to happen*/
509 vstfx->dispatcher_wantcall = 1;
511 /*Wait for the call to happen*/
513 pthread_cond_wait (&vstfx->plugin_dispatcher_called, &vstfx->lock);
514 pthread_mutex_unlock (&vstfx->lock);
516 /*Return the result*/
518 return vstfx->dispatcher_retval;