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, name, DataType::MIDI, flags)
  54         , _timeline_position(0)
  55         , _read_data_count(0)
  56         , _write_data_count(0)
  57         , _converter(s, _timeline_position)
  58         , _writing (false)
  59         , _last_read_end(0)
  60 {
  61 }
  62
  63 MidiSource::MidiSource (Session& s, const XMLNode& node)
  64         : Source (s, node)
  65         , _timeline_position(0)
  66         , _read_data_count(0)
  67         , _write_data_count(0)
  68         , _converter(s, _timeline_position)
  69         , _writing (false)
  70         , _last_read_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)
  98 {
  99         const XMLProperty* prop;
 100
 101         Source::set_state (node);
 102
 103         if ((prop = node.property ("captured-for")) != 0) {
 104                 _captured_for = prop->value();
 105         }
 106
 107         return 0;
 108 }
 109
 110 nframes_t
 111 MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, nframes_t start, nframes_t cnt,
 112                 nframes_t stamp_offset, nframes_t negative_stamp_offset) const
 113 {
 114
 115         Glib::Mutex::Lock lm (_lock);
 116         if (_model) {
 117 #define BEATS_TO_FRAMES(t) (_converter.to(t) + stamp_offset - negative_stamp_offset)
 118
 119                 Evoral::Sequence<double>::const_iterator& i = _model_iter;
 120
 121                 if (_last_read_end == 0 || start != _last_read_end) {
 122                         cerr << "MidiSource::midi_read seeking to frame " << start << endl;
 123                         for (i = _model->begin(); i != _model->end(); ++i) {
 124                                 if (BEATS_TO_FRAMES(i->time()) >= start) {
 125                                         break;
 126                                 }
 127                         }
 128                 }
 129
 130                 _last_read_end = start + cnt;
 131
 132                 for (; i != _model->end(); ++i) {
 133                         const nframes_t time_frames = BEATS_TO_FRAMES(i->time());
 134                         if (time_frames < start + cnt) {
 135                                 dst.write(time_frames, i->event_type(), i->size(), i->buffer());
 136                         } else {
 137                                 break;
 138                         }
 139                 }
 140                 return cnt;
 141         } else {
 142                 return read_unlocked (dst, start, cnt, stamp_offset, negative_stamp_offset);
 143         }
 144 }
 145
 146 nframes_t
 147 MidiSource::midi_write (MidiRingBuffer<nframes_t>& dst, nframes_t cnt)
 148 {
 149         Glib::Mutex::Lock lm (_lock);
 150         return write_unlocked (dst, cnt);
 151 }
 152
 153 bool
 154 MidiSource::file_changed (string path)
 155 {
 156         struct stat stat_file;
 157
 158         int e1 = stat (path.c_str(), &stat_file);
 159
 160         return !e1;
 161 }
 162
 163 void
 164 MidiSource::set_timeline_position (nframes_t when)
 165 {
 166         _timeline_position = when;
 167         _converter.set_origin(when);
 168 }
 169
 170 void
 171 MidiSource::mark_streaming_midi_write_started (NoteMode mode, nframes_t start_frame)
 172 {
 173         set_timeline_position(start_frame); // why do I have a feeling this can break somehow...
 174
 175         if (_model) {
 176                 _model->set_note_mode(mode);
 177                 _model->start_write();
 178         }
 179
 180         _writing = true;
 181 }
 182
 183 void
 184 MidiSource::mark_streaming_write_started ()
 185 {
 186         if (_model) {
 187                 _model->start_write();
 188         }
 189
 190         _writing = true;
 191 }
 192
 193 void
 194 MidiSource::mark_streaming_write_completed ()
 195 {
 196         if (_model) {
 197                 _model->end_write(false); // FIXME: param?
 198         }
 199
 200         _writing = false;
 201 }
 202
 203 void
 204 MidiSource::session_saved()
 205 {
 206         flush_midi();
 207
 208         if (_model && _model->edited()) {
 209                 string newname;
 210                 const string basename = PBD::basename_nosuffix(_name);
 211                 string::size_type last_dash = basename.find_last_of("-");
 212                 if (last_dash == string::npos || last_dash == basename.find_first_of("-")) {
 213                         newname = basename + "-1";
 214                 } else {
 215                         stringstream ss(basename.substr(last_dash+1));
 216                         unsigned write_count = 0;
 217                         ss >> write_count;
 218                         cerr << "WRITE COUNT: " << write_count << endl;
 219                         ++write_count; // start at 1
 220                         ss.clear();
 221                         ss << basename.substr(0, last_dash) << "-" << write_count;
 222                         newname = ss.str();
 223                 }
 224
 225                 string newpath = _session.session_directory().midi_path().to_string() +"/"+ newname + ".mid";
 226
 227                 boost::shared_ptr<MidiSource> newsrc = boost::dynamic_pointer_cast<MidiSource>(
 228                                 SourceFactory::createWritable(DataType::MIDI, _session, newpath, 1, 0, true));
 229
 230                 newsrc->set_timeline_position(_timeline_position);
 231                 _model->write_to(newsrc);
 232
 233                 // cyclic dependency here, ugly :(
 234                 newsrc->set_model(_model);
 235                 _model->set_midi_source(newsrc.get());
 236
 237                 newsrc->flush_midi();
 238
 239                 Switched.emit(newsrc);
 240         }
 241 }
 242
 243 void
 244 MidiSource::set_note_mode(NoteMode mode)
 245 {
 246         if (_model) {
 247                 _model->set_note_mode(mode);
 248         }
 249 }
 250