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