libs/surfaces/mackie/mackie_port.cc

   1 /*
   2         Copyright (C) 2006,2007 John Anderson
   3
   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.
   8
   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.
  13
  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.
  17 */
  18 #include "mackie_port.h"
  19
  20 #include "mackie_control_exception.h"
  21 #include "mackie_control_protocol.h"
  22 #include "mackie_midi_builder.h"
  23 #include "controls.h"
  24 #include "surface.h"
  25
  26 #include <glibmm/main.h>
  27
  28 #include <boost/shared_array.hpp>
  29
  30 #include "midi++/types.h"
  31 #include "midi++/port.h"
  32
  33 #include "ardour/debug.h"
  34 #include "ardour/rc_configuration.h"
  35
  36 #include "i18n.h"
  37
  38 #include <sstream>
  39
  40 using namespace std;
  41 using namespace Mackie;
  42 using namespace ARDOUR;
  43 using namespace PBD;
  44
  45 // The MCU sysex header
  46 MidiByteArray mackie_sysex_hdr ( 5, MIDI::sysex, 0x0, 0x0, 0x66, 0x10 );
  47
  48 // The MCU extender sysex header
  49 MidiByteArray mackie_sysex_hdr_xt ( 5, MIDI::sysex, 0x0, 0x0, 0x66, 0x11 );
  50
  51 MackiePort::MackiePort (MackieControlProtocol & mcp, MIDI::Port & input_port, MIDI::Port & output_port, int number, port_type_t port_type)
  52         : SurfacePort (input_port, output_port, number)
  53         , _mcp( mcp )
  54         , _port_type( port_type )
  55         , _emulation( none )
  56         , _initialising( true )
  57 {
  58         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::MackiePort\n");
  59 }
  60
  61 MackiePort::~MackiePort()
  62 {
  63         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::~MackiePort\n");
  64         close();
  65         DEBUG_TRACE (DEBUG::MackieControl, "~MackiePort finished\n");
  66 }
  67
  68 int MackiePort::strips() const
  69 {
  70         if ( _port_type == mcu )
  71         {
  72                 switch ( _emulation )
  73                 {
  74                         // BCF2000 only has 8 faders, so reserve one for master
  75                         case bcf2000: return 7;
  76                         case mackie: return 8;
  77                         case none:
  78                         default:
  79                                 throw MackieControlException( "MackiePort::strips: don't know what emulation we're using" );
  80                 }
  81         }
  82         else
  83         {
  84                 // must be an extender, ie no master fader
  85                 return 8;
  86         }
  87 }
  88
  89 // should really be in MackiePort
  90 void MackiePort::open()
  91 {
  92         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("MackiePort::open %1\n", *this));
  93
  94         input_port().parser()->sysex.connect_same_thread (sysex_connection, boost::bind (&MackiePort::handle_midi_sysex, this, _1, _2, _3));
  95
  96         // make sure the device is connected
  97         init();
  98 }
  99
 100 void MackiePort::close()
 101 {
 102         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::close\n");
 103
 104         // disconnect signals
 105         any_connection.disconnect();
 106         sysex_connection.disconnect();
 107
 108         // TODO emit a "closing" signal?
 109 }
 110
 111 const MidiByteArray & MackiePort::sysex_hdr() const
 112 {
 113         switch ( _port_type )
 114         {
 115                 case mcu: return mackie_sysex_hdr;
 116                 case ext: return mackie_sysex_hdr_xt;
 117         }
 118         cout << "MackiePort::sysex_hdr _port_type not known" << endl;
 119         return mackie_sysex_hdr;
 120 }
 121
 122 MidiByteArray calculate_challenge_response( MidiByteArray::iterator begin, MidiByteArray::iterator end )
 123 {
 124         MidiByteArray l;
 125         back_insert_iterator<MidiByteArray> back ( l );
 126         copy( begin, end, back );
 127
 128         MidiByteArray retval;
 129
 130         // this is how to calculate the response to the challenge.
 131         // from the Logic docs.
 132         retval << ( 0x7f & ( l[0] + ( l[1] ^ 0xa ) - l[3] ) );
 133         retval << ( 0x7f & ( ( l[2] >> l[3] ) ^ ( l[0] + l[3] ) ) );
 134         retval << ( 0x7f & ( (l[3] - ( l[2] << 2 )) ^ ( l[0] | l[1] ) ) );
 135         retval << ( 0x7f & ( l[1] - l[2] + ( 0xf0 ^ ( l[3] << 4 ) ) ) );
 136
 137         return retval;
 138 }
 139
 140 // not used right now
 141 MidiByteArray MackiePort::host_connection_query( MidiByteArray & bytes )
 142 {
 143         // handle host connection query
 144         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("host connection query: %1\n", bytes));
 145
 146         if ( bytes.size() != 18 )
 147         {
 148                 finalise_init( false );
 149                 ostringstream os;
 150                 os << "expecting 18 bytes, read " << bytes << " from " << input_port().name();
 151                 throw MackieControlException( os.str() );
 152         }
 153
 154         // build and send host connection reply
 155         MidiByteArray response;
 156         response << 0x02;
 157         copy( bytes.begin() + 6, bytes.begin() + 6 + 7, back_inserter( response ) );
 158         response << calculate_challenge_response( bytes.begin() + 6 + 7, bytes.begin() + 6 + 7 + 4 );
 159         return response;
 160 }
 161
 162 // not used right now
 163 MidiByteArray MackiePort::host_connection_confirmation( const MidiByteArray & bytes )
 164 {
 165         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("host_connection_confirmation: %1\n", bytes));
 166
 167         // decode host connection confirmation
 168         if ( bytes.size() != 14 )
 169         {
 170                 finalise_init( false );
 171                 ostringstream os;
 172                 os << "expecting 14 bytes, read " << bytes << " from " << input_port().name();
 173                 throw MackieControlException( os.str() );
 174         }
 175
 176         // send version request
 177         return MidiByteArray( 2, 0x13, 0x00 );
 178 }
 179
 180 void MackiePort::probe_emulation (const MidiByteArray &)
 181 {
 182 #if 0
 183         cout << "MackiePort::probe_emulation: " << bytes.size() << ", " << bytes << endl;
 184
 185         MidiByteArray version_string;
 186         for ( int i = 6; i < 11; ++i ) version_string << bytes[i];
 187         cout << "version_string: " << version_string << endl;
 188 #endif
 189
 190         // TODO investigate using serial number. Also, possibly size of bytes might
 191         // give an indication. Also, apparently MCU sends non-documented messages
 192         // sometimes.
 193         if (!_initialising)
 194         {
 195                 //cout << "MackiePort::probe_emulation out of sequence." << endl;
 196                 return;
 197         }
 198
 199         finalise_init( true );
 200 }
 201
 202 void MackiePort::init()
 203 {
 204         DEBUG_TRACE (DEBUG::MackieControl,  "MackiePort::init\n");
 205
 206         init_mutex.lock();
 207         _initialising = true;
 208
 209         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::init lock acquired\n");
 210
 211         // emit pre-init signal
 212         init_event();
 213
 214         // kick off initialisation. See docs in header file for init()
 215
 216         // bypass the init sequence because sometimes the first
 217         // message doesn't get to the unit, and there's no way
 218         // to do a timed lock in Glib.
 219         //write_sysex ( MidiByteArray ( 2, 0x13, 0x00 ) );
 220
 221         finalise_init( true );
 222 }
 223
 224 void MackiePort::finalise_init( bool yn )
 225 {
 226         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::finalise_init\n");
 227
 228         bool emulation_ok = false;
 229
 230         // probing doesn't work very well, so just use a config variable
 231         // to set the emulation mode
 232         // TODO This might have to be specified on a per-port basis
 233         // in the config file
 234         // if an mcu and a bcf are needed to work as one surface
 235         if ( _emulation == none )
 236         {
 237                 // TODO same as code in mackie_control_protocol.cc
 238                 if ( ARDOUR::Config->get_mackie_emulation() == "bcf" )
 239                 {
 240                         _emulation = bcf2000;
 241                         emulation_ok = true;
 242                 }
 243                 else if ( ARDOUR::Config->get_mackie_emulation() == "mcu" )
 244                 {
 245                         _emulation = mackie;
 246                         emulation_ok = true;
 247                 }
 248                 else
 249                 {
 250                         cout << "unknown mackie emulation: " << ARDOUR::Config->get_mackie_emulation() << endl;
 251                         emulation_ok = false;
 252                 }
 253         }
 254
 255         yn = yn && emulation_ok;
 256
 257         SurfacePort::active( yn );
 258
 259         if (yn) {
 260                 active_event();
 261
 262                 // start handling messages from controls
 263                 connect_any();
 264         }
 265
 266         _initialising = false;
 267         init_cond.signal();
 268         init_mutex.unlock();
 269
 270         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::finalise_init lock released\n");
 271 }
 272
 273 void MackiePort::connect_any()
 274 {
 275         if (!any_connection.connected()) {
 276                 input_port().parser()->any.connect_same_thread (any_connection, boost::bind (&MackiePort::handle_midi_any, this, _1, _2, _3));
 277         }
 278 }
 279
 280 bool MackiePort::wait_for_init()
 281 {
 282         Glib::Mutex::Lock lock( init_mutex );
 283         while (_initialising) {
 284                 DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active waiting\n");
 285                 init_cond.wait( init_mutex );
 286                 DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active released\n");
 287         }
 288         DEBUG_TRACE (DEBUG::MackieControl, "MackiePort::wait_for_active returning\n");
 289         return SurfacePort::active();
 290 }
 291
 292 void MackiePort::handle_midi_sysex (MIDI::Parser &, MIDI::byte * raw_bytes, size_t count )
 293 {
 294         MidiByteArray bytes( count, raw_bytes );
 295         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("handle_midi_sysex: %1\n", bytes));
 296
 297         switch( bytes[5] )
 298         {
 299                 case 0x01:
 300                         // not used right now
 301                         write_sysex (host_connection_query (bytes));
 302                         break;
 303                 case 0x03:
 304                         // not used right now
 305                         write_sysex (host_connection_confirmation (bytes));
 306                         break;
 307                 case 0x04:
 308                         inactive_event ();
 309                         cout << "host connection error" << bytes << endl;
 310                         break;
 311                 case 0x14:
 312                         probe_emulation (bytes);
 313                         break;
 314                 default:
 315                         cout << "unknown sysex: " << bytes << endl;
 316         }
 317 }
 318
 319 Control & MackiePort::lookup_control( MIDI::byte * bytes, size_t count )
 320 {
 321         // Don't instantiate a MidiByteArray here unless it's needed for exceptions.
 322         // Reason being that this method is called for every single incoming
 323         // midi event, and it needs to be as efficient as possible.
 324
 325         Control * control = 0;
 326         MIDI::byte midi_type = bytes[0] & 0xf0; //0b11110000
 327
 328         switch (midi_type) {
 329                 // fader
 330                 case MackieMidiBuilder::midi_fader_id:
 331                 {
 332                         int midi_id = bytes[0] & 0x0f;
 333                         control = _mcp.surface().faders[midi_id];
 334                         if ( control == 0 )
 335                         {
 336                                 MidiByteArray mba( count, bytes );
 337                                 ostringstream os;
 338                                 os << "Control for fader" << bytes << " id " << midi_id << " is null";
 339                                 throw MackieControlException( os.str() );
 340                         }
 341                         break;
 342                 }
 343
 344                 // button
 345                 case MackieMidiBuilder::midi_button_id:
 346                         control = _mcp.surface().buttons[bytes[1]];
 347                         if ( control == 0 )
 348                         {
 349                                 MidiByteArray mba( count, bytes );
 350                                 ostringstream os;
 351                                 os << "Control for button " << mba << " is null";
 352                                 throw MackieControlException( os.str() );
 353                         }
 354                         break;
 355
 356                 // pot (jog wheel, external control)
 357                 case MackieMidiBuilder::midi_pot_id:
 358                         control = _mcp.surface().pots[bytes[1]];
 359                         if ( control == 0 )
 360                         {
 361                                 MidiByteArray mba( count, bytes );
 362                                 ostringstream os;
 363                                 os << "Control for rotary " << mba << " is null";
 364                                 throw MackieControlException( os.str() );
 365                         }
 366                         break;
 367
 368                 default:
 369                         MidiByteArray mba( count, bytes );
 370                         ostringstream os;
 371                         os << "Cannot find control for " << mba;
 372                         throw MackieControlException( os.str() );
 373         }
 374         return *control;
 375 }
 376
 377 // converts midi messages into control_event signals
 378 // it might be worth combining this with lookup_control
 379 // because they have similar logic flows.
 380 void MackiePort::handle_midi_any (MIDI::Parser &, MIDI::byte * raw_bytes, size_t count )
 381 {
 382         MidiByteArray bytes( count, raw_bytes );
 383         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("MackiePort::handle_midi_any %1\n", bytes));
 384
 385         try
 386         {
 387                 // ignore sysex messages
 388                 if ( raw_bytes[0] == MIDI::sysex ) return;
 389
 390                 // sanity checking
 391                 if (count != 3) {
 392                         ostringstream os;
 393                         MidiByteArray mba( count, raw_bytes );
 394                         os << "MackiePort::handle_midi_any needs 3 bytes, but received " << mba;
 395                         throw MackieControlException( os.str() );
 396                 }
 397
 398                 Control & control = lookup_control( raw_bytes, count );
 399                 control.set_in_use (true);
 400
 401                 // This handles incoming bytes. Outgoing bytes
 402                 // are sent by the signal handlers.
 403                 switch (control.type()) {
 404                         // fader
 405                         case Control::type_fader:
 406                         {
 407                                 // only the top-order 10 bits out of 14 are used
 408                                 int midi_pos = ( ( raw_bytes[2] << 7 ) + raw_bytes[1] ) >> 4;
 409
 410                                 // in_use is set by the MackieControlProtocol::handle_strip_button
 411
 412                                 // relies on implicit ControlState constructor
 413                                 control_event( *this, control, float(midi_pos) / float(0x3ff) );
 414                         }
 415                         break;
 416
 417                         // button
 418                         case Control::type_button:
 419                         {
 420                                 ControlState control_state( raw_bytes[2] == 0x7f ? press : release );
 421                                 control.set_in_use (control_state.button_state == press);
 422                                 control_event( *this, control, control_state );
 423
 424                                 break;
 425                         }
 426
 427                         // pot (jog wheel, external control)
 428                         case Control::type_pot:
 429                         {
 430                                 ControlState state;
 431
 432                                 // bytes[2] & 0b01000000 (0x40) give sign
 433                                 state.sign = ( raw_bytes[2] & 0x40 ) == 0 ? 1 : -1;
 434                                 // bytes[2] & 0b00111111 (0x3f) gives delta
 435                                 state.ticks = ( raw_bytes[2] & 0x3f);
 436                                 if (state.ticks == 0) {
 437                                         /* euphonix and perhaps other devices send zero
 438                                            when they mean 1, we think.
 439                                         */
 440                                         state.ticks = 1;
 441                                 }
 442                                 state.delta = float( state.ticks ) / float( 0x3f );
 443
 444                                 /* Pots only emit events when they move, not when they
 445                                    stop moving. So to get a stop event, we need to use a timeout.
 446                                 */
 447
 448                                 control.set_in_use (true);
 449                                 add_in_use_timeout (control, &control);
 450
 451                                 // emit the control event
 452                                 control_event( *this, control, state );
 453                                 break;
 454                         }
 455                         default:
 456                                 cerr << "Do not understand control type " << control;
 457                 }
 458         }
 459
 460         catch( MackieControlException & e ) {
 461                 MidiByteArray bytes( count, raw_bytes );
 462                 cout << bytes << ' ' << e.what() << endl;
 463         }
 464
 465         DEBUG_TRACE (DEBUG::MackieControl, string_compose ("finished MackiePort::handle_midi_any %1\n", bytes));
 466 }
 467