v1/midiio_osx.cpp

   1 /*----------------------------------------------------------------------------
   2     ChucK Concurrent, On-the-fly Audio Programming Language
   3       Compiler and Virtual Machine
   4
   5     Copyright (c) 2004 Ge Wang and Perry R. Cook.  All rights reserved.
   6       http://chuck.cs.princeton.edu/
   7       http://soundlab.cs.princeton.edu/
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17     GNU General Public License for more details.
  18
  19     You should have received a copy of the GNU General Public License
  20     along with this program; if not, write to the Free Software
  21     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22     U.S.A.
  23 -----------------------------------------------------------------------------*/
  24
  25 //-----------------------------------------------------------------------------
  26 // file: midiio_osx.cpp
  27 // desc: midi io osx implementation
  28 //
  29 // author: Ge Wang (gewang@cs.princeton.edu)
  30 //         Perry R. Cook (prc@cs.princeton.edu)
  31 //         Ari Lazier (alazier@cs.princeton.edu)
  32 //-----------------------------------------------------------------------------
  33 #include "midiio_osx.h"
  34 #include <stdio.h>
  35
  36
  37
  38
  39 //-----------------------------------------------------------------------------
  40 // name: MidiOut()
  41 // desc: constructor
  42 //-----------------------------------------------------------------------------
  43 MidiOut::MidiOut()
  44 {
  45     UINT__ m_device_num = 0;
  46     m_midi_out = NULL;
  47     m_midi_port = NULL;
  48     m_midi_endpoint = NULL;
  49     m_msg[0] = '\0';
  50 }
  51
  52
  53
  54
  55 //-----------------------------------------------------------------------------
  56 // name: ~MidiOut()
  57 // desc: destructor
  58 //-----------------------------------------------------------------------------
  59 MidiOut::~MidiOut()
  60 {
  61     this->close();
  62 }
  63
  64
  65
  66
  67 //-----------------------------------------------------------------------------
  68 // name: open()
  69 // desc: open a device
  70 //-----------------------------------------------------------------------------
  71 BOOL__ MidiOut::open( int device_num )
  72 {
  73     OSStatus err = 0;
  74
  75     // close
  76     this->close();
  77
  78     m_device_num = device_num;
  79
  80     // get the number of devices
  81     int num_src = MIDIGetNumberOfDestinations();
  82     if( num_src < 1 )
  83     {
  84         sprintf( m_msg, "error: no MIDI destinations available" );
  85         goto error;
  86     }
  87
  88     // check to see if device is in range
  89     if( device_num < 0 || device_num >= num_src )
  90     {
  91         sprintf( m_msg, "error: cannot open MIDI output device '%d'", device_num );
  92         goto error;
  93     }
  94
  95     // create client
  96     err = MIDIClientCreate( CFSTR( "ChucK_MIDI_Output_Client" ),
  97                             NULL, NULL, &m_midi_out );
  98     if( err != noErr )
  99     {
 100         sprintf( m_msg, "error: cannot open MIDI output client" );
 101         goto error;
 102     }
 103
 104     // make the port
 105     err = MIDIOutputPortCreate( m_midi_out,
 106                                 CFSTR( "ChucK_MIDI_Output_Port" ),
 107                                 &m_midi_port );
 108     if( err != noErr )
 109     {
 110         sprintf( m_msg, "error: cannot open MIDI output port" );
 111         goto error;
 112     }
 113
 114     // source
 115     m_midi_endpoint = MIDIGetDestination( m_device_num );
 116
 117     return TRUE;
 118
 119 error:
 120     this->close();
 121
 122     return FALSE;
 123 }
 124
 125
 126
 127
 128 //-----------------------------------------------------------------------------
 129 // name: close()
 130 // desc: close the device
 131 //-----------------------------------------------------------------------------
 132 BOOL__ MidiOut::close( )
 133 {
 134     // close midi out
 135     if( m_midi_endpoint )
 136     {
 137         MIDIEndpointDispose( m_midi_endpoint );
 138         m_midi_endpoint = NULL;
 139     }
 140
 141     if( m_midi_port )
 142     {
 143         MIDIPortDispose( m_midi_port );
 144         m_midi_port = NULL;
 145     }
 146
 147     if( m_midi_out )
 148     {
 149         MIDIClientDispose( m_midi_out );
 150         m_midi_out = NULL;
 151     }
 152
 153     return TRUE;
 154 }
 155
 156
 157
 158
 159 //-----------------------------------------------------------------------------
 160 // name: drain()
 161 // desc: ...
 162 //-----------------------------------------------------------------------------
 163 BOOL__ MidiOut::drain()
 164 {
 165     return TRUE;
 166 }
 167
 168
 169
 170
 171 //-----------------------------------------------------------------------------
 172 // name: send()
 173 // desc: send 1 BYTE__ midi message
 174 //-----------------------------------------------------------------------------
 175 UINT__ MidiOut::send( BYTE__ status )
 176 {
 177     MidiMsg msg;
 178
 179     // send
 180     msg.data[0] = status;
 181
 182     return this->send( &msg, 1 );
 183 }
 184
 185
 186
 187
 188 //-----------------------------------------------------------------------------
 189 // name: send()
 190 // desc: send 2 BYTE__ midi message
 191 //-----------------------------------------------------------------------------
 192 UINT__ MidiOut::send( BYTE__ status, BYTE__ data1 )
 193 {
 194     MidiMsg msg;
 195
 196     // send
 197     msg.data[0] = status;
 198     msg.data[1] = data1;
 199
 200     return this->send( &msg, 2 );
 201 }
 202
 203
 204
 205
 206 //-----------------------------------------------------------------------------
 207 // name: send()
 208 // desc: send 3 BYTE__ midi message
 209 //-----------------------------------------------------------------------------
 210 UINT__ MidiOut::send( BYTE__ status, BYTE__ data1, BYTE__ data2 )
 211 {
 212     MidiMsg msg;
 213
 214     // send
 215     msg.data[0] = status;
 216     msg.data[1] = data1;
 217     msg.data[2] = data2;
 218
 219     return this->send( &msg, 3 );
 220 }
 221
 222
 223
 224
 225 //-----------------------------------------------------------------------------
 226 // name: send()
 227 // desc: send midi message
 228 //-----------------------------------------------------------------------------
 229 UINT__ MidiOut::send( const MidiMsg * msg, DWORD__ length )
 230 {
 231     OSStatus err = 0;
 232     MIDIPacketList pl;
 233
 234     if( length == 0 )
 235         length = 3;
 236
 237     // fill the packet
 238     pl.numPackets = 1;
 239     pl.packet[0].timeStamp = 0;
 240     pl.packet[0].length = length;
 241     pl.packet[0].data[0] = msg->data[0];
 242     pl.packet[0].data[1] = msg->data[1];
 243     pl.packet[0].data[2] = msg->data[2];
 244
 245     // go
 246     err = MIDISend( m_midi_port, m_midi_endpoint, &pl );
 247
 248     // check err
 249     if( err != noErr )
 250         sprintf( m_msg, "error: cannot send MIDI packet" );
 251
 252     return err == noErr;
 253 }
 254
 255
 256
 257 //-----------------------------------------------------------------------------
 258 // name: MidiIn()
 259 // desc: constructor
 260 //-----------------------------------------------------------------------------
 261 MidiIn::MidiIn()
 262 {
 263     m_device_num = 0;
 264     m_midi_in = NULL;
 265     m_midi_port = NULL;
 266     m_midi_endpoint = NULL;
 267
 268     pthread_mutex_init( &m_mutex, NULL );
 269     m_buffer.initialize( 1024, sizeof( MidiMsg ) );
 270
 271     m_msg[0] = '\0';
 272 }
 273
 274
 275
 276
 277 //-----------------------------------------------------------------------------
 278 // name: ~MidiIn()
 279 // desc: destructor
 280 //-----------------------------------------------------------------------------
 281 MidiIn::~MidiIn( )
 282 {
 283     this->close();
 284     pthread_mutex_destroy( &m_mutex );
 285 }
 286
 287
 288
 289
 290 //-----------------------------------------------------------------------------
 291 // name: open()
 292 // desc: open
 293 //-----------------------------------------------------------------------------
 294 BOOL__ MidiIn::open( int device_num )
 295 {
 296     OSStatus err = 0;
 297
 298     // close it first
 299     this->close();
 300
 301     m_device_num = device_num;
 302
 303     // get the number of devices
 304     int num_src = MIDIGetNumberOfSources();
 305     if( num_src < 1 )
 306     {
 307         sprintf( m_msg, "error: no MIDI sources available" );
 308         goto error;
 309     }
 310
 311     // check to see if device is in range
 312     if( device_num < 0 || device_num >= num_src )
 313     {
 314         sprintf( m_msg, "error: cannot open MIDI input device '%d'", device_num );
 315         goto error;
 316     }
 317
 318     // create client
 319     err = MIDIClientCreate( CFSTR( "ChucK_MIDI_Input_Client" ),
 320                             NULL, NULL, &m_midi_in );
 321     if( err != noErr )
 322     {
 323         sprintf( m_msg, "error: cannot open MIDI input client" );
 324         goto error;
 325     }
 326
 327     // make the port
 328     err = MIDIInputPortCreate( m_midi_in,
 329                                CFSTR( "ChucK_MIDI_Input_Port" ),
 330                                midi_in_cb,
 331                                (void *)this,
 332                                &m_midi_port );
 333     if( err != noErr )
 334     {
 335         sprintf( m_msg, "error: cannot open MIDI input port" );
 336         goto error;
 337     }
 338
 339     // connect to source
 340     m_midi_endpoint = MIDIGetSource( m_device_num );
 341     err = MIDIPortConnectSource( m_midi_port, m_midi_endpoint, NULL );
 342     if( err != noErr )
 343     {
 344         sprintf( m_msg, "error: cannot connect to MIDI source" );
 345         goto error;
 346     }
 347
 348     return TRUE;
 349
 350 error:
 351     this->close();
 352
 353     return FALSE;
 354 }
 355
 356
 357
 358
 359 //-----------------------------------------------------------------------------
 360 // name: close()
 361 // desc: close
 362 //-----------------------------------------------------------------------------
 363 BOOL__ MidiIn::close()
 364 {
 365     // close midi out
 366     if( m_midi_endpoint )
 367     {
 368         MIDIEndpointDispose( m_midi_endpoint );
 369         m_midi_endpoint = NULL;
 370     }
 371
 372     if( m_midi_port )
 373     {
 374         MIDIPortDispose( m_midi_port );
 375         m_midi_port = NULL;
 376     }
 377
 378     if( m_midi_in )
 379     {
 380         MIDIClientDispose( m_midi_in );
 381         m_midi_in = NULL;
 382     }
 383
 384     // pthread_cancel( m_cb_thread_id );
 385
 386     return TRUE;
 387 }
 388
 389
 390
 391
 392 //-----------------------------------------------------------------------------
 393 // name: get()
 394 // desc: get message
 395 //-----------------------------------------------------------------------------
 396 UINT__ MidiIn::recv( MidiMsg * msg )
 397 {
 398     UINT__ r = 0;
 399     //pthread_mutex_lock( &m_mutex );
 400     r = m_buffer.get( msg, 1 );
 401     //pthread_mutex_unlock( &m_mutex );
 402
 403     return r;
 404 }
 405
 406
 407
 408
 409 //-----------------------------------------------------------------------------
 410 // name: midi_in_cb()
 411 // desc: ...
 412 //-----------------------------------------------------------------------------
 413 void MidiIn::midi_in_cb( const MIDIPacketList * list,
 414                          void * port_data,
 415                          void * connect_data )
 416 {
 417     MidiIn * min = (MidiIn *)port_data;
 418     BYTE__ byte = 0;
 419     int n = 0, num_args = 0, num_left = 0, length = 0;
 420     MidiMsg msg;
 421     const MIDIPacket * packet = &list->packet[0];
 422
 423     pthread_mutex_lock( &min->m_mutex );
 424     for( UINT__ i = 0; i < list->numPackets; i++, packet = MIDIPacketNext( packet ) )
 425     {
 426         length = packet->length;
 427         n = 0;
 428
 429         while( n < length )
 430         {
 431             byte = packet->data[n++];
 432
 433             if( byte & 0x80 ) // status byte
 434             {
 435                 if( (byte & 0xf0) == 0xf0 ) // system msg
 436                     continue;
 437
 438                 if( ( (byte & 0xf0) == 0xc0 ) || ( (byte & 0xf0) == 0xd0 ) )
 439                     num_args = 1;
 440                 else
 441                     num_args = 2;
 442
 443                 msg.data[0] = 0;
 444                 msg.data[1] = byte;
 445                 msg.data[2] = 0;
 446                 msg.data[3] = 0;
 447                 num_left = num_args;
 448             }
 449             else // data byte
 450             {
 451                 if( num_left == num_args )
 452                     msg.data[2] = byte;
 453                 else
 454                     msg.data[3] = byte;
 455
 456                 num_left--;
 457
 458                 if( !num_left )
 459                 {
 460                     if( ((msg.data[1] & 0xf0) == 0xc0) || ((msg.data[1] & 0xf0) == 0xd0) )
 461                         num_left = 1;
 462                     else
 463                         num_left = 2;
 464
 465                     min->m_buffer.put( &msg, 1 );
 466                 }
 467             }
 468         }
 469     }
 470     pthread_mutex_unlock( &min->m_mutex );
 471 }