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_iter_valid(false)
  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_iter_valid(false)
  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_iter_valid = false;
 128         _model_iter.invalidate();
 129 }
 130
 131 nframes_t
 132 MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, sframes_t source_start,
 133                        sframes_t start, nframes_t cnt,
 134                        sframes_t stamp_offset, sframes_t negative_stamp_offset,
 135                        MidiStateTracker* tracker) const
 136 {
 137         Glib::Mutex::Lock lm (_lock);
 138
 139         BeatsFramesConverter converter(_session, source_start);
 140
 141         if (_model) {
 142                 //cerr << "READ @ " << start << " * " << cnt << " (source @ " << source_start << " {" << endl;
 143 #define BEATS_TO_FRAMES(t) (converter.to(t) + stamp_offset - negative_stamp_offset)
 144
 145                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 146
 147                 // If the cached iterator is invalid, search for the first event past start
 148                 if (_last_read_end == 0 || start != _last_read_end || !_model_iter_valid) {
 149                         for (i = _model->begin(); i != _model->end(); ++i) {
 150                                 if (BEATS_TO_FRAMES(i->time()) >= start) {
 151                                         break;
 152                                 }
 153                         }
 154                         _model_iter_valid = true;
 155                 }
 156
 157                 _last_read_end = start + cnt;
 158
 159                 // Read events up to source_start + start + cnt
 160                 for (; i != _model->end(); ++i) {
 161                         const sframes_t time_frames = BEATS_TO_FRAMES(i->time());
 162                         //cerr << "Read? " << time_frames << " < " << source_start + start + cnt << endl;
 163                         if (time_frames < source_start + start + cnt) {
 164                                 //cerr << "Read @ " << time_frames << endl;
 165                                 dst.write(time_frames, i->event_type(), i->size(), i->buffer());
 166                                 if (tracker) {
 167                                         Evoral::MIDIEvent<Evoral::MusicalTime>& ev (*(Evoral::MIDIEvent<Evoral::MusicalTime>*) (&(*i)));
 168                                         if (ev.is_note_on()) {
 169                                                 tracker->add (ev.note(), ev.channel());
 170                                         } else if (ev.is_note_off()) {
 171                                                 tracker->remove (ev.note(), ev.channel());
 172                                         }
 173                                 }
 174                         } else {
 175                                 //cerr << "End" << endl;
 176                                 break;
 177                         }
 178                 }
 179                 //cerr << "}" << endl;
 180                 return cnt;
 181         } else {
 182                 return read_unlocked (dst, source_start, start, cnt, stamp_offset, negative_stamp_offset, tracker);
 183         }
 184 }
 185
 186 nframes_t
 187 MidiSource::midi_write (MidiRingBuffer<nframes_t>& source, sframes_t source_start, nframes_t duration)
 188 {
 189         Glib::Mutex::Lock lm (_lock);
 190         const nframes_t ret = write_unlocked (source, source_start, duration);
 191         _last_write_end += duration;
 192         return ret;
 193 }
 194
 195 bool
 196 MidiSource::file_changed (string path)
 197 {
 198         struct stat stat_file;
 199
 200         int e1 = stat (path.c_str(), &stat_file);
 201
 202         return !e1;
 203 }
 204
 205 void
 206 MidiSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
 207 {
 208         set_timeline_position(start_frame);
 209
 210         if (_model) {
 211                 _model->set_note_mode(mode);
 212                 _model->start_write();
 213         }
 214
 215         _last_write_end = start_frame;
 216         _writing = true;
 217 }
 218
 219 void
 220 MidiSource::mark_streaming_write_started ()
 221 {
 222         sframes_t start_frame = _session.transport_frame();
 223
 224         if (_model) {
 225                 _model->start_write();
 226         }
 227
 228         _last_write_end = start_frame;
 229         _writing = true;
 230 }
 231
 232 void
 233 MidiSource::mark_streaming_write_completed ()
 234 {
 235         if (_model) {
 236                 _model->end_write(false);
 237         }
 238
 239         _writing = false;
 240 }
 241
 242 void
 243 MidiSource::session_saved()
 244 {
 245         flush_midi();
 246
 247         if (_model && _model->edited()) {
 248                 string newname;
 249                 const string basename = PBD::basename_nosuffix(_name);
 250                 string::size_type last_dash = basename.find_last_of("-");
 251                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 252                         newname = basename + "-1";
 253                 } else {
 254                         stringstream ss(basename.substr(last_dash+1));
 255                         unsigned write_count = 0;
 256                         ss >> write_count;
 257                         // cerr << "WRITE COUNT: " << write_count << endl;
 258                         ++write_count; // start at 1
 259                         ss.clear();
 260                         ss << basename.substr(0, last_dash) << "-" << write_count;
 261                         newname = ss.str();
 262                 }
 263
 264                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 265
 266                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 267                                 SourceFactory::createWritable(DataType::MIDI, _session,
 268                                                 newpath, true, false, _session.frame_rate()));
 269
 270                 newsrc->set_timeline_position(_timeline_position);
 271                 _model->write_to(newsrc);
 272
 273                 // cyclic dependency here, ugly :(
 274                 newsrc->set_model(_model);
 275                 _model->set_midi_source(newsrc.get());
 276
 277                 newsrc->flush_midi();
 278
 279                 Switched.emit(newsrc);
 280         }
 281 }
 282
 283 void
 284 MidiSource::set_note_mode(NoteMode mode)
 285 {
 286         if (_model) {
 287                 _model->set_note_mode(mode);
 288         }
 289 }
 290