src/tX_midiin.cc

   1 /*
   2   terminatorX - realtime audio scratching software
   3   Copyright (C) 2002 Arthur Peters
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9
  10   This program is distributed in the hope that it will be useful,
  11   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13   GNU General Public License for more details.
  14
  15   You should have received a copy of the GNU General Public License
  16   along with this program; if not, write to the Free Software
  17   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19   File: tX_midiin.cc
  20
  21   Description: Implements MIDI input to control turntable parameters.
  22
  23         Changes (Alexander König <alex@lisas.de>:
  24         - Using a glib GIOCallback instead of polling events
  25         - Updating the treeview immedialtey after bind/unbind_clicked
  26         - Adding "remove binding" option
  27         - Adding destroy handler for the GUI
  28         - moving printf to tX_* macros
  29         - removing some debug code
  30 */
  31
  32 #include "tX_midiin.h"
  33 #include "tX_vtt.h"
  34 #include "tX_glade_interface.h"
  35 #include "tX_glade_support.h"
  36
  37 #ifdef USE_ALSA_MIDI_IN
  38 #include "tX_global.h"
  39 #include <iostream>
  40 #include "tX_engine.h"
  41
  42 using namespace std;
  43
  44 static gboolean midi_callback(GIOChannel *source, GIOCondition condition, gpointer data) {
  45         tX_midiin *midi=(tX_midiin *) data;
  46         midi->check_event();
  47
  48         return TRUE;
  49 }
  50
  51 tX_midiin::tX_midiin()
  52 {
  53         is_open=false;
  54         sp_to_learn=NULL;
  55         learn_dialog=NULL;
  56
  57         if (snd_seq_open(&ALSASeqHandle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
  58                 tX_error("tX_midiin(): failed to open the default sequencer device.");
  59                 return;
  60         }
  61         snd_seq_set_client_name(ALSASeqHandle, "terminatorX");
  62         portid =
  63                 snd_seq_create_simple_port(ALSASeqHandle,
  64                                                                    "Control Input",
  65                                                                    SND_SEQ_PORT_CAP_WRITE
  66                                                                    | SND_SEQ_PORT_CAP_SUBS_WRITE,
  67                                                                    SND_SEQ_PORT_TYPE_APPLICATION);
  68         if (portid < 0) {
  69                 tX_error("tX_midiin(): error creating sequencer port.");
  70                 return;
  71         }
  72
  73         snd_seq_nonblock( ALSASeqHandle, 1 );
  74
  75         struct pollfd fds[32];
  76
  77         int res=snd_seq_poll_descriptors (ALSASeqHandle, fds, 32, POLLIN);
  78
  79         if (res!=1) {
  80                 tX_error("Failed to poll ALSA descriptors: %i.\n", res);
  81         }
  82
  83         GIOChannel *ioc=g_io_channel_unix_new(fds[0].fd);
  84         g_io_add_watch(ioc, (GIOCondition)( G_IO_IN ), midi_callback, (gpointer) this);
  85         g_io_channel_unref(ioc);
  86
  87         is_open=true;
  88
  89         tX_debug("tX_midiin(): sequencer successfully opened.");
  90 }
  91
  92 tX_midiin::~tX_midiin()
  93 {
  94         if (is_open) {
  95                 snd_seq_close(ALSASeqHandle);
  96                 tX_debug("tX_midiin(): sequencer closed.");
  97         }
  98 }
  99
 100 int tX_midiin::check_event()
 101 {
 102         snd_seq_event_t *ev;
 103
 104         while( snd_seq_event_input(ALSASeqHandle, &ev) != -EAGAIN )
 105         {
 106
 107                 //MidiEvent::type MessageType=MidiEvent::NONE;
 108                 //int Volume=0,Note=0,EventDevice=0;
 109                 tX_midievent event;
 110                 event.is_noteon = false;
 111                 bool event_usable = true;
 112
 113                 switch (ev->type) {
 114                         case SND_SEQ_EVENT_CONTROLLER:
 115                                 event.type = tX_midievent::CC;
 116                                 event.number = ev->data.control.param;
 117                                 event.value = ev->data.control.value / 127.0;
 118                                 event.channel = ev->data.control.channel;
 119                                 break;
 120                         case SND_SEQ_EVENT_PITCHBEND:
 121                                 event.type = tX_midievent::PITCHBEND;
 122                                 event.number = ev->data.control.param;
 123                                 event.value = (ev->data.control.value + 8191.0) / 16382.0; // 127.0;
 124                                 event.channel = ev->data.control.channel;
 125                                 break;
 126                         case SND_SEQ_EVENT_CONTROL14:
 127                                 event.type = tX_midievent::CC14;
 128                                 event.number = ev->data.control.param;
 129                                 event.value = ev->data.control.value / 16383.0;
 130                                 event.channel = ev->data.control.channel;
 131                                 break;
 132                         case SND_SEQ_EVENT_REGPARAM:
 133                                 event.type = tX_midievent::RPN;
 134                                 event.number = ev->data.control.param;
 135                                 event.value = ev->data.control.value / 16383.0;
 136                                 event.channel = ev->data.control.channel;
 137                                 break;
 138                         case SND_SEQ_EVENT_NONREGPARAM:
 139                                 event.type = tX_midievent::NRPN;
 140                                 event.number = ev->data.control.param;
 141                                 event.value = ev->data.control.value / 16383.0;
 142                                 event.channel = ev->data.control.channel;
 143                                 break;
 144                         case SND_SEQ_EVENT_NOTEON:
 145                                 event.type = tX_midievent::NOTE;
 146                                 event.number = ev->data.note.note;
 147                                 event.value = ev->data.note.velocity / 127.0;
 148                                 event.channel = ev->data.note.channel;
 149
 150                                 event.is_noteon = true;
 151                                 if( event.value == 0 )
 152                                         event.is_noteon = false;
 153                                 break;
 154                         case SND_SEQ_EVENT_NOTEOFF:
 155                                 event.type = tX_midievent::NOTE;
 156                                 event.number = ev->data.note.note;
 157                                 event.value = ev->data.note.velocity / 127.0;
 158                                 event.channel = ev->data.note.channel;
 159
 160                                 event.is_noteon = false;
 161                                 break;
 162                         default:
 163                                 event_usable = false;
 164                 }
 165
 166                 snd_seq_free_event(ev);
 167
 168                 if( event_usable ) {
 169                         if (event.channel<0 || event.channel>15) {
 170                                 tX_error("tX_midiin::check_event(): invaild event channel %i.", event.channel);
 171                                 return -1;
 172                         }
 173
 174                         if (sp_to_learn) {
 175                                 sp_to_learn->bound_midi_event=event;
 176                                 sp_to_learn=NULL;
 177
 178                                 if (learn_dialog) {
 179                                         gtk_widget_destroy(learn_dialog);
 180                                         learn_dialog=NULL;
 181                                 }
 182                         } else {
 183                                 // This should be solved with a hash table. Possibly.
 184
 185                                 list <tX_seqpar *> :: iterator sp;
 186
 187                                 for (sp=tX_seqpar::all.begin(); sp!=tX_seqpar::all.end(); sp++) {
 188                                         if ( (*sp)->bound_midi_event.type_matches (event) ) {
 189                                                 (*sp)->handle_midi_input (event);
 190                                         }
 191                                 }
 192                         }
 193
 194                         last_event = event;
 195                 }
 196
 197         }
 198         return 1;
 199 }
 200
 201 void tX_midiin::configure_bindings( vtt_class* vtt )
 202 {
 203         list <tX_seqpar *> :: iterator sp;
 204
 205         GType types[3] = { G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER };
 206         GtkListStore* model = gtk_list_store_newv(3, types);
 207         GtkTreeIter iter;
 208         char tempstr[128];
 209
 210         for (sp=tX_seqpar::all.begin(); sp!=tX_seqpar::all.end(); sp++) {
 211                 if (((*sp)->is_mappable) && ((*sp)->vtt) == (void*) vtt) {
 212
 213                         snprintf( tempstr, sizeof(tempstr), "Type: %d, Number: %d, Channel: %d",
 214                                           (*sp)->bound_midi_event.type, (*sp)->bound_midi_event.number,
 215                                           (*sp)->bound_midi_event.channel );
 216
 217                         gtk_list_store_append( model, &iter );
 218                         gtk_list_store_set( model, &iter,
 219                                                                 0, (*sp)->get_name(),
 220                                                                 1, tempstr,
 221                                                                 2, (*sp),
 222                                                                 -1 );
 223                 }
 224         }
 225
 226         // it will delete itself.
 227         new midi_binding_gui(GTK_TREE_MODEL(model), this);
 228 }
 229
 230 tX_midiin::midi_binding_gui::midi_binding_gui ( GtkTreeModel* _model, tX_midiin* _midi )
 231         : model(_model), midi( _midi )
 232 {
 233         GtkWidget *hbox1;
 234         GtkWidget *scrolledwindow1;
 235         GtkWidget *vbox1;
 236         GtkWidget *label1;
 237         GtkWidget *frame1;
 238
 239         window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 240         gtk_window_set_title (GTK_WINDOW (window), "Configure MIDI Bindings");
 241         gtk_window_set_default_size(GTK_WINDOW(window), 600, 260);
 242
 243         hbox1 = gtk_hbox_new (FALSE, 2);
 244         gtk_widget_show (hbox1);
 245         gtk_container_add (GTK_CONTAINER (window), hbox1);
 246         gtk_container_set_border_width(GTK_CONTAINER(hbox1), 4);
 247
 248         scrolledwindow1 = gtk_scrolled_window_new (NULL, NULL);
 249         gtk_widget_show (scrolledwindow1);
 250         gtk_box_pack_start (GTK_BOX (hbox1), scrolledwindow1, TRUE, TRUE, 0);
 251
 252         parameter_treeview = gtk_tree_view_new_with_model (model);
 253         gtk_widget_show (parameter_treeview);
 254         gtk_container_add (GTK_CONTAINER (scrolledwindow1), parameter_treeview);
 255
 256         GtkCellRenderer   *renderer = gtk_cell_renderer_text_new ();
 257         gtk_tree_view_insert_column_with_attributes( GTK_TREE_VIEW( parameter_treeview ),
 258                                                                                            -1, "Parameter", renderer,
 259                                                                                            "text", 0,
 260                                                                                            NULL );
 261         gtk_tree_view_insert_column_with_attributes( GTK_TREE_VIEW( parameter_treeview ),
 262                                                                                            -1, "Event", renderer,
 263                                                                                            "text", 1,
 264                                                                                            NULL );
 265         gtk_tree_view_set_headers_visible( GTK_TREE_VIEW(parameter_treeview), TRUE );
 266
 267         vbox1 = gtk_vbox_new (FALSE, 0);
 268         gtk_widget_show (vbox1);
 269         gtk_box_pack_start (GTK_BOX (hbox1), vbox1, FALSE, FALSE, 0);
 270
 271         label1 = gtk_label_new ("Selected MIDI Event:");
 272         gtk_widget_show (label1);
 273         gtk_box_pack_start (GTK_BOX (vbox1), label1, FALSE, FALSE, 0);
 274         gtk_label_set_justify (GTK_LABEL (label1), GTK_JUSTIFY_LEFT);
 275
 276         frame1 = gtk_frame_new (NULL);
 277         gtk_widget_show (frame1);
 278         gtk_box_pack_start (GTK_BOX (vbox1), frame1, TRUE, TRUE, 0);
 279         gtk_container_set_border_width (GTK_CONTAINER (frame1), 2);
 280         gtk_frame_set_label_align (GTK_FRAME (frame1), 0, 0);
 281         gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_IN);
 282
 283         midi_event_info = gtk_label_new ("Use a MIDI thing to select it.");
 284         gtk_widget_show (midi_event_info);
 285         gtk_container_add (GTK_CONTAINER (frame1), midi_event_info);
 286         gtk_label_set_justify (GTK_LABEL (midi_event_info), GTK_JUSTIFY_LEFT);
 287
 288         bind_button = gtk_button_new_with_mnemonic ("Bind");
 289         gtk_widget_show (bind_button);
 290         gtk_box_pack_start (GTK_BOX (vbox1), bind_button, FALSE, FALSE, 0);
 291
 292         GtkWidget* unbind_button = gtk_button_new_with_mnemonic ("Remove Binding");
 293         gtk_widget_show (unbind_button);
 294         gtk_box_pack_start (GTK_BOX (vbox1), unbind_button, FALSE, FALSE, 0);
 295
 296         GtkWidget* close_button = gtk_button_new_with_mnemonic ("Close");
 297         gtk_widget_show (close_button);
 298         gtk_box_pack_start (GTK_BOX (vbox1), close_button, FALSE, FALSE, 0);
 299
 300         gtk_signal_connect(GTK_OBJECT(bind_button), "clicked", (GtkSignalFunc) bind_clicked, (void *) this);
 301         gtk_signal_connect(GTK_OBJECT(unbind_button), "clicked", (GtkSignalFunc) unbind_clicked, (void *) this);
 302         gtk_signal_connect(GTK_OBJECT(close_button), "clicked", (GtkSignalFunc) close_clicked, (void *) this);
 303         gtk_signal_connect(GTK_OBJECT(window), "destroy", (GtkSignalFunc) close_clicked, (void *) this);
 304
 305         timer_tag = gtk_timeout_add( 100, (GtkFunction) timer, (void *) this);
 306
 307         gtk_widget_show_all( GTK_WIDGET( window ) );
 308 }
 309
 310 void tX_midiin::midi_binding_gui::window_closed(GtkWidget *widget, gpointer _this )
 311 {
 312         tX_midiin::midi_binding_gui* this_ = (tX_midiin::midi_binding_gui*)_this;
 313
 314         delete this_;
 315 }
 316
 317 void tX_midiin::midi_binding_gui::unbind_clicked( GtkButton *button, gpointer _this )
 318 {
 319         tX_midiin::midi_binding_gui* this_ = (tX_midiin::midi_binding_gui*)_this;
 320         GtkTreeModel* model;
 321         GtkTreeSelection* selection;
 322         GtkTreeIter iter;
 323         char tmpstr[128];
 324         tX_seqpar* param;
 325
 326         selection = gtk_tree_view_get_selection( GTK_TREE_VIEW(this_->parameter_treeview) );
 327         gtk_tree_selection_get_selected( selection, &model, &iter );
 328         gtk_tree_model_get( model, &iter, 2, &param, -1 );
 329
 330         param->bound_midi_event.type=tX_midievent::NONE;
 331         param->bound_midi_event.number=0;
 332         param->bound_midi_event.channel=0;
 333
 334         snprintf( tmpstr, sizeof(tmpstr), "Type: %d, Number: %d, Channel: %d",
 335                                 param->bound_midi_event.type, param->bound_midi_event.number,
 336                                 param->bound_midi_event.channel );
 337
 338         gtk_list_store_set(GTK_LIST_STORE(model), &iter, 0, param->get_name(), 1, tmpstr, 2, param, -1 );
 339 }
 340
 341
 342 void tX_midiin::midi_binding_gui::bind_clicked( GtkButton *button, gpointer _this )
 343 {
 344         tX_midiin::midi_binding_gui* this_ = (tX_midiin::midi_binding_gui*)_this;
 345         GtkTreeModel* model;
 346         GtkTreeSelection* selection;
 347         GtkTreeIter iter;
 348         char tmpstr[128];
 349         tX_seqpar* param;
 350
 351         selection = gtk_tree_view_get_selection( GTK_TREE_VIEW(this_->parameter_treeview) );
 352         gtk_tree_selection_get_selected( selection, &model, &iter );
 353         gtk_tree_model_get( model, &iter, 2, &param, -1 );
 354
 355         param->bound_midi_event = this_->last_event;
 356
 357         snprintf( tmpstr, sizeof(tmpstr), "Type: %d, Number: %d, Channel: %d",
 358                                 param->bound_midi_event.type, param->bound_midi_event.number,
 359                                 param->bound_midi_event.channel );
 360
 361         gtk_list_store_set(GTK_LIST_STORE(model), &iter, 0, param->get_name(), 1, tmpstr, 2, param, -1 );
 362 }
 363
 364 void tX_midiin::midi_binding_gui::close_clicked( GtkButton *button, gpointer _this )
 365 {
 366         tX_midiin::midi_binding_gui* this_ = (tX_midiin::midi_binding_gui*)_this;
 367
 368         gtk_widget_destroy( this_->window );
 369 }
 370
 371 gint tX_midiin::midi_binding_gui::timer( gpointer _this )
 372 {
 373         tX_midiin::midi_binding_gui* this_ = (tX_midiin::midi_binding_gui*)_this;
 374         tX_midievent tmpevent = this_->midi->get_last_event();
 375
 376         if( tmpevent.type_matches( this_->last_event ) )
 377                 return TRUE;
 378
 379         this_->last_event = tmpevent;
 380         this_->last_event.clear_non_type();
 381
 382         snprintf( this_->tempstr, sizeof(this_->tempstr),
 383                           "Type: %d (CC=%d, NOTE=%d)\nNumber: %d\nChannel: %d\n",
 384                           this_->last_event.type, tX_midievent::CC, tX_midievent::NOTE,
 385                           this_->last_event.number,
 386                           this_->last_event.channel );
 387
 388         gtk_label_set_text( GTK_LABEL(this_->midi_event_info), this_->tempstr );
 389
 390         return TRUE;
 391 }
 392
 393 tX_midiin::midi_binding_gui::~midi_binding_gui ()
 394 {
 395         gtk_timeout_remove( timer_tag );
 396 }
 397
 398 void tX_midiin::set_midi_learn_sp(tX_seqpar *sp)
 399 {
 400         char buffer[512];
 401
 402         if (learn_dialog) {
 403                 gtk_widget_destroy(learn_dialog);
 404         }
 405
 406         sp_to_learn=sp;
 407
 408         if (!sp_to_learn) return;
 409
 410         learn_dialog=create_tX_midilearn();
 411         GtkWidget *label=lookup_widget(learn_dialog, "midilabel");
 412
 413         sprintf(buffer, "Learning MIDI mapping for <b>%s</b>\nfor turntable <b>%s</b>.\n\nWaiting for MIDI event...", sp->get_name(), sp->get_vtt_name());
 414         gtk_label_set_markup(GTK_LABEL(label), buffer);
 415         gtk_widget_show(learn_dialog);
 416
 417         g_signal_connect(G_OBJECT(lookup_widget(learn_dialog, "cancel")), "clicked", G_CALLBACK (tX_midiin::midi_learn_cancel), this);
 418         g_signal_connect(G_OBJECT(learn_dialog), "destroy", G_CALLBACK (tX_midiin::midi_learn_destroy), this);
 419 }
 420
 421 void tX_midiin::cancel_midi_learn()
 422 {
 423         sp_to_learn=NULL;
 424         learn_dialog=NULL;
 425 }
 426
 427 gboolean tX_midiin::midi_learn_cancel(GtkWidget *widget, tX_midiin *midi)
 428 {
 429         midi->sp_to_learn=NULL;
 430         gtk_widget_destroy(midi->learn_dialog);
 431 }
 432
 433 gboolean tX_midiin::midi_learn_destroy(GtkWidget *widget, tX_midiin *midi)
 434 {
 435         midi->cancel_midi_learn();
 436 }
 437
 438 void tX_midiin::store_connections(FILE *rc, char *indent)
 439 {
 440         gzFile *rz;
 441
 442         tX_store("%s<midi_connections>\n", indent);
 443         strcat(indent, "\t");
 444
 445         snd_seq_addr_t my_addr;
 446         my_addr.client=snd_seq_client_id(ALSASeqHandle);
 447         my_addr.port=portid;
 448
 449         snd_seq_query_subscribe_t *subs;
 450         snd_seq_query_subscribe_alloca(&subs);
 451         snd_seq_query_subscribe_set_root(subs, &my_addr);
 452         snd_seq_query_subscribe_set_type(subs, SND_SEQ_QUERY_SUBS_WRITE);
 453         snd_seq_query_subscribe_set_index(subs, 0);
 454
 455         while (snd_seq_query_port_subscribers(ALSASeqHandle, subs) >= 0) {
 456                 const snd_seq_addr_t *addr;
 457                 addr = snd_seq_query_subscribe_get_addr(subs);
 458
 459                 tX_store("%s<link client=\"%i\" port=\"%i\"/>\n", indent, addr->client, addr->port);
 460                 snd_seq_query_subscribe_set_index(subs, snd_seq_query_subscribe_get_index(subs) + 1);
 461         }
 462
 463         indent[strlen(indent)-1]=0;
 464         tX_store("%s</midi_connections>\n", indent);
 465 }
 466
 467 void tX_midiin::restore_connections(xmlNodePtr node)
 468 {
 469         snd_seq_addr_t my_addr;
 470         my_addr.client=snd_seq_client_id(ALSASeqHandle);
 471         my_addr.port=portid;
 472
 473         if (xmlStrcmp(node->name, (xmlChar *) "midi_connections")==0) {
 474                 for (xmlNodePtr cur=node->xmlChildrenNode; cur != NULL; cur = cur->next) {
 475                         if (cur->type == XML_ELEMENT_NODE) {
 476                                 if (xmlStrcmp(cur->name, (xmlChar *) "link")==0) {
 477                                         char *buffer;
 478                                         int client=-1;
 479                                         int port=-1;
 480
 481                                         buffer=(char *) xmlGetProp(cur, (xmlChar *) "client");
 482                                         if (buffer) {
 483                                                 sscanf(buffer, "%i", &client);
 484                                         }
 485
 486                                         buffer=(char *) xmlGetProp(cur, (xmlChar *) "port");
 487                                         if (buffer) {
 488                                                 sscanf(buffer, "%i", &port);
 489                                         }
 490
 491                                         if ((port>=0) && (client>=0)) {
 492                                                 snd_seq_addr_t sender_addr;
 493                                                 sender_addr.client=client;
 494                                                 sender_addr.port=port;
 495
 496                                                 snd_seq_port_subscribe_t *subs;
 497                                                 snd_seq_port_subscribe_alloca(&subs);
 498                                                 snd_seq_port_subscribe_set_sender(subs, &sender_addr);
 499                                                 snd_seq_port_subscribe_set_dest(subs, &my_addr);
 500
 501                                                 if (snd_seq_subscribe_port(ALSASeqHandle, subs) < 0) {
 502                                                         tX_error("tX_midiin::restore_connections() -> failed to connect to: %d:%d.", port, client);
 503                                                 }
 504                                         } else {
 505                                                 tX_error("tX_midiin::restore_connections() -> invalid port: %d:%d.", port, client);
 506                                         }
 507
 508                                 } else {
 509                                         tX_error("tX_midiin::restore_connections() -> invalid element: %s.", cur->name);
 510                                 }
 511                         }
 512                 }
 513         } else {
 514                 tX_error("tX_midiin::restore_connections() -> invalid XML element.");
 515         }
 516 }
 517
 518
 519 extern "C" {
 520         void tX_midiin_store_connections(FILE *rc, char *indent);
 521         void tX_midiin_restore_connections(xmlNodePtr node);
 522 };
 523
 524 void tX_midiin_store_connections(FILE *rc, char *indent)
 525 {
 526         tX_engine::get_instance()->get_midi()->store_connections(rc, indent);
 527 }
 528
 529 void tX_midiin_restore_connections(xmlNodePtr node)
 530 {
 531         tX_engine::get_instance()->get_midi()->restore_connections(node);
 532 }
 533
 534 #endif // USE_ALSA_MIDI_IN