libs/ardour/midi_source.cc

   1 /*
   2     Copyright (C) 2006 Paul Davis
   3         Written by Dave Robillard, 2006
   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
  20 #include <sys/stat.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <poll.h>
  24 #include <float.h>
  25 #include <cerrno>
  26 #include <ctime>
  27 #include <cmath>
  28 #include <iomanip>
  29 #include <algorithm>
  30
  31 #include "pbd/xml++.h"
  32 #include "pbd/pthread_utils.h"
  33 #include "pbd/basename.h"
  34
  35 #include "ardour/audioengine.h"
  36 #include "ardour/midi_model.h"
  37 #include "ardour/midi_ring_buffer.h"
  38 #include "ardour/midi_state_tracker.h"
  39 #include "ardour/midi_source.h"
  40 #include "ardour/session.h"
  41 #include "ardour/session_directory.h"
  42 #include "ardour/source_factory.h"
  43 #include "ardour/tempo.h"
  44
  45 #include "i18n.h"
  46
  47 using namespace std;
  48 using namespace ARDOUR;
  49 using namespace PBD;
  50
  51 sigc::signal<void,MidiSource *> MidiSource::MidiSourceCreated;
  52
  53 MidiSource::MidiSource (Session& s, string name, Source::Flag flags)
  54         : Source(s, DataType::MIDI, name, flags)
  55         , _read_data_count(0)
  56         , _write_data_count(0)
  57         , _writing(false)
  58         , _model_iterator_valid(true)
  59         , _length_beats(0.0)
  60         , _last_read_end(0)
  61         , _last_write_end(0)
  62 {
  63 }
  64
  65 MidiSource::MidiSource (Session& s, const XMLNode& node)
  66         : Source(s, node)
  67         , _read_data_count(0)
  68         , _write_data_count(0)
  69         , _writing(false)
  70         , _model_iterator_valid(true)
  71         , _length_beats(0.0)
  72         , _last_read_end(0)
  73         , _last_write_end(0)
  74 {
  75         _read_data_count = 0;
  76         _write_data_count = 0;
  77
  78         if (set_state (node, Stateful::loading_state_version)) {
  79                 throw failed_constructor();
  80         }
  81 }
  82
  83 MidiSource::~MidiSource ()
  84 {
  85 }
  86
  87 XMLNode&
  88 MidiSource::get_state ()
  89 {
  90         XMLNode& node (Source::get_state());
  91
  92         if (_captured_for.length()) {
  93                 node.add_property ("captured-for", _captured_for);
  94         }
  95
  96         return node;
  97 }
  98
  99 int
 100 MidiSource::set_state (const XMLNode& node, int /*version*/)
 101 {
 102         const XMLProperty* prop;
 103
 104         if ((prop = node.property ("captured-for")) != 0) {
 105                 _captured_for = prop->value();
 106         }
 107
 108         return 0;
 109 }
 110
 111 sframes_t
 112 MidiSource::length (sframes_t pos) const
 113 {
 114         BeatsFramesConverter converter(_session, pos);
 115         return converter.to(_length_beats);
 116 }
 117
 118 void
 119 MidiSource::update_length (sframes_t /*pos*/, sframes_t /*cnt*/)
 120 {
 121         // You're not the boss of me!
 122 }
 123
 124 void
 125 MidiSource::invalidate ()
 126 {
 127         _model_iterator_valid = false;
 128 }
 129
 130 nframes_t
 131 MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, sframes_t source_start,
 132                        sframes_t start, nframes_t cnt,
 133                        sframes_t stamp_offset, sframes_t negative_stamp_offset,
 134                        MidiStateTracker* tracker) const
 135 {
 136         Glib::Mutex::Lock lm (_lock);
 137
 138         BeatsFramesConverter converter(_session, source_start);
 139
 140         if (_model) {
 141                 //cerr << "READ @ " << start << " * " << cnt << " (source @ " << source_start << " {" << endl;
 142 #define BEATS_TO_FRAMES(t) (converter.to(t) + stamp_offset - negative_stamp_offset)
 143
 144                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 145
 146                 // If the cached iterator is invalid, search for the first event past start
 147                 if (_last_read_end == 0 || start != _last_read_end || !_model_iterator_valid) {
 148                         for (i = _model->begin(); i != _model->end(); ++i) {
 149                                 if (BEATS_TO_FRAMES(i->time()) >= start) {
 150                                         break;
 151                                 }
 152                         }
 153                         _model_iterator_valid = true;
 154                 }
 155
 156                 _last_read_end = start + cnt;
 157
 158                 // Read events up to source_start + start + cnt
 159                 for (; i != _model->end(); ++i) {
 160                         const sframes_t time_frames = BEATS_TO_FRAMES(i->time());
 161                         //cerr << "Read? " << time_frames << " < " << source_start + start + cnt << endl;
 162                         if (time_frames < source_start + start + cnt) {
 163                                 //cerr << "Read @ " << time_frames << endl;
 164                                 dst.write(time_frames, i->event_type(), i->size(), i->buffer());
 165                                 if (tracker) {
 166                                         Evoral::MIDIEvent<Evoral::MusicalTime>& ev (*(Evoral::MIDIEvent<Evoral::MusicalTime>*) (&(*i)));
 167                                         if (ev.is_note_on()) {
 168                                                 tracker->add (ev.note(), ev.channel());
 169                                         } else if (ev.is_note_off()) {
 170                                                 tracker->remove (ev.note(), ev.channel());
 171                                         }
 172                                 }
 173                         } else {
 174                                 //cerr << "End" << endl;
 175                                 break;
 176                         }
 177                 }
 178                 //cerr << "}" << endl;
 179                 return cnt;
 180         } else {
 181                 return read_unlocked (dst, source_start, start, cnt, stamp_offset, negative_stamp_offset, tracker);
 182         }
 183 }
 184
 185 nframes_t
 186 MidiSource::midi_write (MidiRingBuffer<nframes_t>& source, sframes_t source_start, nframes_t duration)
 187 {
 188         Glib::Mutex::Lock lm (_lock);
 189         const nframes_t ret = write_unlocked (source, source_start, duration);
 190         _last_write_end += duration;
 191         return ret;
 192 }
 193
 194 bool
 195 MidiSource::file_changed (string path)
 196 {
 197         struct stat stat_file;
 198
 199         int e1 = stat (path.c_str(), &stat_file);
 200
 201         return !e1;
 202 }
 203
 204 void
 205 MidiSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
 206 {
 207         set_timeline_position(start_frame);
 208
 209         if (_model) {
 210                 _model->set_note_mode(mode);
 211                 _model->start_write();
 212         }
 213
 214         _last_write_end = start_frame;
 215         _writing = true;
 216 }
 217
 218 void
 219 MidiSource::mark_streaming_write_started ()
 220 {
 221         sframes_t start_frame = _session.transport_frame();
 222
 223         if (_model) {
 224                 _model->start_write();
 225         }
 226
 227         _last_write_end = start_frame;
 228         _writing = true;
 229 }
 230
 231 void
 232 MidiSource::mark_streaming_write_completed ()
 233 {
 234         if (_model) {
 235                 _model->end_write(false);
 236         }
 237
 238         _writing = false;
 239 }
 240
 241 void
 242 MidiSource::session_saved()
 243 {
 244         flush_midi();
 245
 246         if (_model && _model->edited()) {
 247                 string newname;
 248                 const string basename = PBD::basename_nosuffix(_name);
 249                 string::size_type last_dash = basename.find_last_of("-");
 250                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 251                         newname = basename + "-1";
 252                 } else {
 253                         stringstream ss(basename.substr(last_dash+1));
 254                         unsigned write_count = 0;
 255                         ss >> write_count;
 256                         // cerr << "WRITE COUNT: " << write_count << endl;
 257                         ++write_count; // start at 1
 258                         ss.clear();
 259                         ss << basename.substr(0, last_dash) << "-" << write_count;
 260                         newname = ss.str();
 261                 }
 262
 263                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 264
 265                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 266                                 SourceFactory::createWritable(DataType::MIDI, _session,
 267                                                 newpath, true, false, _session.frame_rate()));
 268
 269                 newsrc->set_timeline_position(_timeline_position);
 270                 _model->write_to(newsrc);
 271
 272                 // cyclic dependency here, ugly :(
 273                 newsrc->set_model(_model);
 274                 _model->set_midi_source(newsrc.get());
 275
 276                 newsrc->flush_midi();
 277
 278                 Switched.emit(newsrc);
 279         }
 280 }
 281
 282 void
 283 MidiSource::set_note_mode(NoteMode mode)
 284 {
 285         if (_model) {
 286                 _model->set_note_mode(mode);
 287         }
 288 }
 289