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/debug.h"
  37 #include "ardour/midi_model.h"
  38 #include "ardour/midi_ring_buffer.h"
  39 #include "ardour/midi_state_tracker.h"
  40 #include "ardour/midi_source.h"
  41 #include "ardour/session.h"
  42 #include "ardour/session_directory.h"
  43 #include "ardour/source_factory.h"
  44 #include "ardour/tempo.h"
  45
  46 #include "i18n.h"
  47
  48 using namespace std;
  49 using namespace ARDOUR;
  50 using namespace PBD;
  51
  52 sigc::signal<void,MidiSource *> MidiSource::MidiSourceCreated;
  53
  54 MidiSource::MidiSource (Session& s, string name, Source::Flag flags)
  55         : Source(s, DataType::MIDI, name, flags)
  56         , _read_data_count(0)
  57         , _write_data_count(0)
  58         , _writing(false)
  59         , _model_iter_valid(false)
  60         , _length_beats(0.0)
  61         , _last_read_end(0)
  62         , _last_write_end(0)
  63 {
  64 }
  65
  66 MidiSource::MidiSource (Session& s, const XMLNode& node)
  67         : Source(s, node)
  68         , _read_data_count(0)
  69         , _write_data_count(0)
  70         , _writing(false)
  71         , _model_iter_valid(false)
  72         , _length_beats(0.0)
  73         , _last_read_end(0)
  74         , _last_write_end(0)
  75 {
  76         _read_data_count = 0;
  77         _write_data_count = 0;
  78
  79         if (set_state (node, Stateful::loading_state_version)) {
  80                 throw failed_constructor();
  81         }
  82 }
  83
  84 MidiSource::~MidiSource ()
  85 {
  86 }
  87
  88 XMLNode&
  89 MidiSource::get_state ()
  90 {
  91         XMLNode& node (Source::get_state());
  92
  93         if (_captured_for.length()) {
  94                 node.add_property ("captured-for", _captured_for);
  95         }
  96
  97         return node;
  98 }
  99
 100 int
 101 MidiSource::set_state (const XMLNode& node, int /*version*/)
 102 {
 103         const XMLProperty* prop;
 104
 105         if ((prop = node.property ("captured-for")) != 0) {
 106                 _captured_for = prop->value();
 107         }
 108
 109         return 0;
 110 }
 111
 112 sframes_t
 113 MidiSource::length (sframes_t pos) const
 114 {
 115         BeatsFramesConverter converter(_session.tempo_map(), pos);
 116         return converter.to(_length_beats);
 117 }
 118
 119 void
 120 MidiSource::update_length (sframes_t /*pos*/, sframes_t /*cnt*/)
 121 {
 122         // You're not the boss of me!
 123 }
 124
 125 void
 126 MidiSource::invalidate ()
 127 {
 128         _model_iter_valid = false;
 129         _model_iter.invalidate();
 130 }
 131
 132 nframes_t
 133 MidiSource::midi_read (Evoral::EventSink<nframes_t>& dst, sframes_t source_start,
 134                        sframes_t start, nframes_t cnt,
 135                        sframes_t stamp_offset, sframes_t negative_stamp_offset,
 136                        MidiStateTracker* tracker) const
 137 {
 138         Glib::Mutex::Lock lm (_lock);
 139
 140         BeatsFramesConverter converter(_session.tempo_map(), source_start);
 141
 142         if (_model) {
 143                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 144
 145                 // If the cached iterator is invalid, search for the first event past start
 146                 if (_last_read_end == 0 || start != _last_read_end || !_model_iter_valid) {
 147                         DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("*** %1 search for relevant iterator for %1 / %2\n", _name, source_start, start));
 148                         for (i = _model->begin(); i != _model->end(); ++i) {
 149                                 if (converter.to(i->time()) >= start) {
 150                                         break;
 151                                 }
 152                         }
 153                         _model_iter_valid = true;
 154                 } else {
 155                         DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("*** %1 use cached iterator for %1 / %2\n", _name, source_start, start));
 156                 }
 157
 158                 _last_read_end = start + cnt;
 159
 160                 // Read events up to end
 161                 for (; i != _model->end(); ++i) {
 162                         const sframes_t time_frames = converter.to(i->time());
 163                         if (time_frames < start + cnt) {
 164                                 dst.write(time_frames + stamp_offset - negative_stamp_offset,
 165                                                 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                                                 DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("\t%1 add note on %2 @ %3\n", _name, ev.note(), time_frames));
 170                                                 tracker->add (ev.note(), ev.channel());
 171                                         } else if (ev.is_note_off()) {
 172                                                 DEBUG_TRACE (DEBUG::MidiSourceIO, string_compose ("\t%1 add note off %2 @ %3\n", _name, ev.note(), time_frames));
 173                                                 tracker->remove (ev.note(), ev.channel());
 174                                         }
 175                                 }
 176                         } else {
 177                                 break;
 178                         }
 179                 }
 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 void
 196 MidiSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
 197 {
 198         set_timeline_position(start_frame);
 199
 200         if (_model) {
 201                 _model->set_note_mode(mode);
 202                 _model->start_write();
 203         }
 204
 205         _last_write_end = start_frame;
 206         _writing = true;
 207 }
 208
 209 void
 210 MidiSource::mark_streaming_write_started ()
 211 {
 212         NoteMode note_mode = _model ? _model->note_mode() : Sustained;
 213         mark_streaming_midi_write_started(note_mode, _session.transport_frame());
 214 }
 215
 216 void
 217 MidiSource::mark_streaming_write_completed ()
 218 {
 219         if (_model) {
 220                 _model->end_write(false);
 221         }
 222
 223         _writing = false;
 224 }
 225
 226 void
 227 MidiSource::session_saved()
 228 {
 229         flush_midi();
 230
 231         if (_model && _model->edited()) {
 232                 string newname;
 233                 const string basename = PBD::basename_nosuffix(_name);
 234                 string::size_type last_dash = basename.find_last_of("-");
 235                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 236                         newname = basename + "-1";
 237                 } else {
 238                         stringstream ss(basename.substr(last_dash+1));
 239                         unsigned write_count = 0;
 240                         ss >> write_count;
 241                         // cerr << "WRITE COUNT: " << write_count << endl;
 242                         ++write_count; // start at 1
 243                         ss.clear();
 244                         ss << basename.substr(0, last_dash) << "-" << write_count;
 245                         newname = ss.str();
 246                 }
 247
 248                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 249
 250                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 251                                 SourceFactory::createWritable(DataType::MIDI, _session,
 252                                                 newpath, true, false, _session.frame_rate()));
 253
 254                 newsrc->set_timeline_position(_timeline_position);
 255                 _model->write_to(newsrc);
 256
 257                 // cyclic dependency here, ugly :(
 258                 newsrc->set_model(_model);
 259                 _model->set_midi_source(newsrc.get());
 260
 261                 newsrc->flush_midi();
 262
 263                 Switched.emit(newsrc);
 264         }
 265 }
 266
 267 void
 268 MidiSource::set_note_mode(NoteMode mode)
 269 {
 270         if (_model) {
 271                 _model->set_note_mode(mode);
 272         }
 273 }
 274