2 Copyright (C) 2000 Paul Barton-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.
23 #include <pbd/error.h>
24 #include <midi++/mmc.h>
25 #include <midi++/port.h>
26 #include <midi++/parser.h>
32 static std::map<int,string> mmc_cmd_map;
33 static void build_mmc_cmd_map ()
35 pair<int,string> newpair;
38 newpair.second = "Stop";
39 mmc_cmd_map.insert (newpair);
42 newpair.second = "Play";
43 mmc_cmd_map.insert (newpair);
46 newpair.second = "DeferredPlay";
47 mmc_cmd_map.insert (newpair);
50 newpair.second = "FastForward";
51 mmc_cmd_map.insert (newpair);
54 newpair.second = "Rewind";
55 mmc_cmd_map.insert (newpair);
58 newpair.second = "RecordStrobe";
59 mmc_cmd_map.insert (newpair);
62 newpair.second = "RecordExit";
63 mmc_cmd_map.insert (newpair);
66 newpair.second = "RecordPause";
67 mmc_cmd_map.insert (newpair);
70 newpair.second = "Pause";
71 mmc_cmd_map.insert (newpair);
74 newpair.second = "Eject";
75 mmc_cmd_map.insert (newpair);
78 newpair.second = "Chase";
79 mmc_cmd_map.insert (newpair);
82 newpair.second = "CommandErrorReset";
83 mmc_cmd_map.insert (newpair);
86 newpair.second = "MmcReset";
87 mmc_cmd_map.insert (newpair);
90 newpair.second = "Illegal Mackie Jog Start";
91 mmc_cmd_map.insert (newpair);
94 newpair.second = "Illegal Mackie Jog Stop";
95 mmc_cmd_map.insert (newpair);
98 newpair.second = "Write";
99 mmc_cmd_map.insert (newpair);
101 newpair.first = 0x41;
102 newpair.second = "MaskedWrite";
103 mmc_cmd_map.insert (newpair);
105 newpair.first = 0x42;
106 newpair.second = "Read";
107 mmc_cmd_map.insert (newpair);
109 newpair.first = 0x43;
110 newpair.second = "Update";
111 mmc_cmd_map.insert (newpair);
113 newpair.first = 0x44;
114 newpair.second = "Locate";
115 mmc_cmd_map.insert (newpair);
117 newpair.first = 0x45;
118 newpair.second = "VariablePlay";
119 mmc_cmd_map.insert (newpair);
121 newpair.first = 0x46;
122 newpair.second = "Search";
123 mmc_cmd_map.insert (newpair);
125 newpair.first = 0x47;
126 newpair.second = "Shuttle";
127 mmc_cmd_map.insert (newpair);
129 newpair.first = 0x48;
130 newpair.second = "Step";
131 mmc_cmd_map.insert (newpair);
133 newpair.first = 0x49;
134 newpair.second = "AssignSystemMaster";
135 mmc_cmd_map.insert (newpair);
137 newpair.first = 0x4A;
138 newpair.second = "GeneratorCommand";
139 mmc_cmd_map.insert (newpair);
141 newpair.first = 0x4B;
142 newpair.second = "MtcCommand";
143 mmc_cmd_map.insert (newpair);
145 newpair.first = 0x4C;
146 newpair.second = "Move";
147 mmc_cmd_map.insert (newpair);
149 newpair.first = 0x4D;
150 newpair.second = "Add";
151 mmc_cmd_map.insert (newpair);
153 newpair.first = 0x4E;
154 newpair.second = "Subtract";
155 mmc_cmd_map.insert (newpair);
157 newpair.first = 0x4F;
158 newpair.second = "DropFrameAdjust";
159 mmc_cmd_map.insert (newpair);
161 newpair.first = 0x50;
162 newpair.second = "Procedure";
163 mmc_cmd_map.insert (newpair);
165 newpair.first = 0x51;
166 newpair.second = "Event";
167 mmc_cmd_map.insert (newpair);
169 newpair.first = 0x52;
170 newpair.second = "Group";
171 mmc_cmd_map.insert (newpair);
173 newpair.first = 0x53;
174 newpair.second = "CommandSegment";
175 mmc_cmd_map.insert (newpair);
177 newpair.first = 0x54;
178 newpair.second = "DeferredVariablePlay";
179 mmc_cmd_map.insert (newpair);
181 newpair.first = 0x55;
182 newpair.second = "RecordStrobeVariable";
183 mmc_cmd_map.insert (newpair);
185 newpair.first = 0x7C;
186 newpair.second = "Wait";
187 mmc_cmd_map.insert (newpair);
189 newpair.first = 0x7F;
190 newpair.second = "Resume";
191 mmc_cmd_map.insert (newpair);
195 MachineControl::MachineControl (Port &p, float version,
196 CommandSignature &csig,
197 ResponseSignature &rsig)
203 build_mmc_cmd_map ();
207 if ((parser = _port.input()) != 0) {
209 (mem_fun (*this, &MachineControl::process_mmc_message));
211 warning << "MMC connected to a non-input port: useless!"
217 MachineControl::set_device_id (byte id)
220 _device_id = id & 0x7f;
224 MachineControl::is_mmc (byte *sysex_buf, size_t len)
227 if (len < 4 || len > 48) {
231 if (sysex_buf[1] != 0x7f) {
235 if (sysex_buf[3] != 0x6 && /* MMC Command */
236 sysex_buf[3] != 0x7) { /* MMC Response */
244 MachineControl::process_mmc_message (Parser &p, byte *msg, size_t len)
251 /* Reject if its not for us. 0x7f is the "all-call" device ID */
253 /* msg[0] = 0x7f (MMC sysex ID(
255 msg[2] = 0x6 (MMC command) or 0x7 (MMC response)
256 msg[3] = MMC command code
257 msg[4] = (typically) byte count for following part of command
261 cerr << "*** me = " << (int) _device_id << " MMC message: len = " << len << "\n\t";
262 for (size_t i = 0; i < len; i++) {
263 cerr << hex << (int) msg[i] << dec << ' ';
268 if (msg[1] != 0x7f && msg[1] != _device_id) {
279 /* this works for all non-single-byte "counted"
280 commands. we set it to 1 for the exceptions.
283 std::map<int,string>::iterator x = mmc_cmd_map.find ((int)mmc_msg[0]);
284 string cmdname = "unknown";
286 if (x != mmc_cmd_map.end()) {
287 cmdname = (*x).second;
291 cerr << "+++ MMC type "
295 << " \"" << cmdname << "\" "
302 /* SINGLE-BYTE, UNCOUNTED COMMANDS */
314 case cmdDeferredPlay:
315 DeferredPlay (*this);
329 case cmdRecordStrobe:
330 RecordStrobe (*this);
359 case cmdCommandErrorReset:
360 CommandErrorReset (*this);
369 case cmdIllegalMackieJogStart:
374 case cmdIllegalMackieJogStop:
379 /* END OF SINGLE-BYTE, UNCOUNTED COMMANDS */
382 do_masked_write (mmc_msg, len);
386 do_locate (mmc_msg, len);
390 do_shuttle (mmc_msg, len);
394 do_step (mmc_msg, len);
400 case cmdVariablePlay:
402 case cmdAssignSystemMaster:
403 case cmdGeneratorCommand:
408 case cmdDropFrameAdjust:
412 case cmdCommandSegment:
413 case cmdDeferredVariablePlay:
414 case cmdRecordStrobeVariable:
417 error << "MIDI::MachineControl: unimplemented MMC command "
418 << hex << (int) *mmc_msg << dec
424 error << "MIDI::MachineControl: unknown MMC command "
425 << hex << (int) *mmc_msg << dec
431 /* increase skiplen to cover the command byte and
432 count byte (if it existed).
436 skiplen = mmc_msg[1] + 2;
441 if (len <= skiplen) {
448 } while (len > 1); /* skip terminating EOX byte */
452 MachineControl::do_masked_write (byte *msg, size_t len)
455 /* return the number of bytes "consumed" */
457 int retval = msg[1] + 2; /* bytes following + 2 */
460 case 0x4f: /* Track Record Ready Status */
461 write_track_record_ready (&msg[3], len - 3);
465 warning << "MIDI::MachineControl: masked write to "
466 << hex << (int) msg[2] << dec
467 << " not implemented"
475 MachineControl::write_track_record_ready (byte *msg, size_t len)
481 /* Bits 0-4 of the first byte are for special tracks:
489 the format of the message (its an MMC Masked Write) is:
492 <count> byte count of following data
493 <name> byte value of the field being written
494 <byte #> byte number of target byte in the
495 bitmap being written to
496 <mask> ones in the mask indicate which bits will be changed
497 <data> new data for the byte being written
499 by the time this code is executing, msg[0] is the
500 byte number of the target byte. if its zero, we
501 are writing to a special byte in the standard
502 track bitmap, in which the first 5 bits are
503 special. hence the bits for tracks 1 + 2 are bits
504 5 and 6 of the first byte of the track
507 change track 1: msg[0] = 0; << first byte of track bitmap
508 msg[1] = 0100000; << binary: bit 5 set
510 change track 2: msg[0] = 0; << first byte of track bitmap
511 msg[1] = 1000000; << binary: bit 6 set
513 change track 3: msg[0] = 1; << second byte of track bitmap
514 msg[1] = 0000001; << binary: bit 0 set
516 the (msg[0] * 8) - 6 computation is an attempt to
517 extract the value of the first track: ie. the one
518 that would be indicated by bit 0 being set.
520 so, if msg[0] = 0, msg[1] = 0100000 (binary),
521 what happens is that base_track = -5, but by the
522 time we check the correct bit, n = 5, and so the
523 computed track for the status change is 0 (first
526 if msg[0] = 1, then the base track for any change is 2 (the third track), and so on.
529 /* XXX check needed to make sure we don't go outside the
530 supported number of tracks.
536 base_track = (msg[0] * 8) - 6;
539 for (n = 0; n < 7; n++) {
540 if (msg[1] & (1<<n)) {
542 /* Only touch tracks that have the "mask"
546 if (msg[2] & (1<<n)) {
547 trackRecordStatus[base_track+n] = true;
548 TrackRecordStatusChange (*this, base_track+n,
551 trackRecordStatus[base_track+n] = false;
552 TrackRecordStatusChange (*this, base_track+n,
561 MachineControl::do_locate (byte *msg, size_t msglen)
565 warning << "MIDI::MMC: locate [I/F] command not supported"
570 /* regular "target" locate command */
572 Locate (*this, &msg[3]);
577 MachineControl::do_step (byte *msg, size_t msglen)
579 int steps = msg[2] & 0x3f;
590 MachineControl::do_shuttle (byte *msg, size_t msglen)
608 left_shift = (sh & 0x38);
610 integral = ((sh & 0x7) << left_shift) | (sm >> (7 - left_shift));
611 fractional = ((sm << left_shift) << 7) | sl;
613 shuttle_speed = integral +
614 ((float)fractional / (1 << (14 - left_shift)));
616 Shuttle (*this, shuttle_speed, forward);