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         , _length_beats(0.0)
  59         , _last_read_end(0)
  60         , _last_write_end(0)
  61 {
  62 }
  63
  64 MidiSource::MidiSource (Session& s, const XMLNode& node)
  65         : Source (s, node)
  66         , _read_data_count(0)
  67         , _write_data_count(0)
  68         , _writing (false)
  69         , _length_beats(0.0)
  70         , _last_read_end(0)
  71         , _last_write_end(0)
  72 {
  73         _read_data_count = 0;
  74         _write_data_count = 0;
  75
  76         if (set_state (node, Stateful::loading_state_version)) {
  77                 throw failed_constructor();
  78         }
  79 }
  80
  81 MidiSource::~MidiSource ()
  82 {
  83 }
  84
  85 XMLNode&
  86 MidiSource::get_state ()
  87 {
  88         XMLNode& node (Source::get_state());
  89
  90         if (_captured_for.length()) {
  91                 node.add_property ("captured-for", _captured_for);
  92         }
  93
  94         return node;
  95 }
  96
  97 int
  98 MidiSource::set_state (const XMLNode& node, int version)
  99 {
 100         const XMLProperty* prop;
 101
 102         if ((prop = node.property ("captured-for")) != 0) {
 103                 _captured_for = prop->value();
 104         }
 105
 106         return 0;
 107 }
 108
 109 sframes_t
 110 MidiSource::length (sframes_t pos) const
 111 {
 112         BeatsFramesConverter converter(_session, pos);
 113         return converter.to(_length_beats);
 114 }
 115
 116 void
 117 MidiSource::update_length (sframes_t /*pos*/, sframes_t /*cnt*/)
 118 {
 119         // You're not the boss of me!
 120 }
 121
 122 void
 123 MidiSource::invalidate ()
 124 {
 125         _model_iter.invalidate();
 126 }
 127
 128 nframes_t
 129 MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, sframes_t source_start,
 130                        sframes_t start, nframes_t cnt,
 131                        sframes_t stamp_offset, sframes_t negative_stamp_offset,
 132                        MidiStateTracker* tracker) const
 133 {
 134         Glib::Mutex::Lock lm (_lock);
 135
 136         BeatsFramesConverter converter(_session, source_start);
 137
 138         if (_model) {
 139 #define BEATS_TO_FRAMES(t) (converter.to(t) + stamp_offset - negative_stamp_offset)
 140
 141                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 142
 143                 if (_last_read_end == 0 || start != _last_read_end || !i.valid()) {
 144                         for (i = _model->begin(); i != _model->end(); ++i) {
 145                                 if (BEATS_TO_FRAMES(i->time()) >= start) {
 146                                         break;
 147                                 }
 148                         }
 149                 }
 150
 151                 _last_read_end = start + cnt;
 152
 153                 for (; i != _model->end(); ++i) {
 154                         const sframes_t time_frames = BEATS_TO_FRAMES(i->time());
 155                         if (time_frames < source_start + start + cnt) {
 156                                 dst.write(time_frames, i->event_type(), i->size(), i->buffer());
 157                                 if (tracker) {
 158                                         Evoral::MIDIEvent<Evoral::MusicalTime>& ev (*(Evoral::MIDIEvent<Evoral::MusicalTime>*) (&(*i)));
 159                                         if (ev.is_note_on()) {
 160                                                 tracker->add (ev.note(), ev.channel());
 161                                         } else if (ev.is_note_off()) {
 162                                                 tracker->remove (ev.note(), ev.channel());
 163                                         }
 164                                 }
 165                         } else {
 166                                 break;
 167                         }
 168                 }
 169                 return cnt;
 170         } else {
 171                 return read_unlocked (dst, source_start, start, cnt, stamp_offset, negative_stamp_offset, tracker);
 172         }
 173 }
 174
 175 nframes_t
 176 MidiSource::midi_write (MidiRingBuffer<nframes_t>& source, sframes_t source_start, nframes_t duration)
 177 {
 178         Glib::Mutex::Lock lm (_lock);
 179         const nframes_t ret = write_unlocked (source, source_start, duration);
 180         _last_write_end += duration;
 181         return ret;
 182 }
 183
 184 bool
 185 MidiSource::file_changed (string path)
 186 {
 187         struct stat stat_file;
 188
 189         int e1 = stat (path.c_str(), &stat_file);
 190
 191         return !e1;
 192 }
 193
 194 void
 195 MidiSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
 196 {
 197         set_timeline_position(start_frame);
 198
 199         if (_model) {
 200                 _model->set_note_mode(mode);
 201                 _model->start_write();
 202         }
 203
 204         _last_write_end = start_frame;
 205         _writing = true;
 206 }
 207
 208 void
 209 MidiSource::mark_streaming_write_started ()
 210 {
 211         sframes_t start_frame = _session.transport_frame();
 212
 213         if (_model) {
 214                 _model->start_write();
 215         }
 216
 217         _last_write_end = start_frame;
 218         _writing = true;
 219 }
 220
 221 void
 222 MidiSource::mark_streaming_write_completed ()
 223 {
 224         if (_model) {
 225                 _model->end_write(false);
 226         }
 227
 228         _writing = false;
 229 }
 230
 231 void
 232 MidiSource::session_saved()
 233 {
 234         flush_midi();
 235
 236         if (_model && _model->edited()) {
 237                 string newname;
 238                 const string basename = PBD::basename_nosuffix(_name);
 239                 string::size_type last_dash = basename.find_last_of("-");
 240                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 241                         newname = basename + "-1";
 242                 } else {
 243                         stringstream ss(basename.substr(last_dash+1));
 244                         unsigned write_count = 0;
 245                         ss >> write_count;
 246                         // cerr << "WRITE COUNT: " << write_count << endl;
 247                         ++write_count; // start at 1
 248                         ss.clear();
 249                         ss << basename.substr(0, last_dash) << "-" << write_count;
 250                         newname = ss.str();
 251                 }
 252
 253                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 254
 255                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 256                                 SourceFactory::createWritable(DataType::MIDI, _session,
 257                                                 newpath, true, false, _session.frame_rate()));
 258
 259                 newsrc->set_timeline_position(_timeline_position);
 260                 _model->write_to(newsrc);
 261
 262                 // cyclic dependency here, ugly :(
 263                 newsrc->set_model(_model);
 264                 _model->set_midi_source(newsrc.get());
 265
 266                 newsrc->flush_midi();
 267
 268                 Switched.emit(newsrc);
 269         }
 270 }
 271
 272 void
 273 MidiSource::set_note_mode(NoteMode mode)
 274 {
 275         if (_model) {
 276                 _model->set_note_mode(mode);
 277         }
 278 }
 279