libs/backends/jack/jack_session.cc

   1 /*
   2   Copyright (C) 2013 Paul Davis
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20
  21 #include <time.h>
  22
  23 #include <glibmm/miscutils.h>
  24
  25 #include "pbd/localtime_r.h"
  26
  27 #include "ardour/audioengine.h"
  28 #include "ardour/filename_extensions.h"
  29 #include "ardour/session.h"
  30 #include "ardour/session_directory.h"
  31 #include "ardour/tempo.h"
  32
  33 #include "jack_session.h"
  34
  35 using namespace ARDOUR;
  36 using std::string;
  37
  38 JACKSession::JACKSession (Session* s)
  39         : SessionHandlePtr (s)
  40 {
  41 }
  42
  43 JACKSession::~JACKSession ()
  44 {
  45 }
  46
  47 void
  48 JACKSession::session_event (jack_session_event_t* event)
  49 {
  50         char timebuf[128], *tmp;
  51         time_t n;
  52         struct tm local_time;
  53
  54         time (&n);
  55         localtime_r (&n, &local_time);
  56         strftime (timebuf, sizeof(timebuf), "JS_%FT%T", &local_time);
  57
  58         while ((tmp = strchr(timebuf, ':'))) { *tmp = '.'; }
  59
  60         if (event->type == JackSessionSaveTemplate)
  61         {
  62                 if (_session->save_template( timebuf )) {
  63                         event->flags = JackSessionSaveError;
  64                 } else {
  65                         string cmd ("ardour3 -P -U ");
  66                         cmd += event->client_uuid;
  67                         cmd += " -T ";
  68                         cmd += timebuf;
  69
  70                         event->command_line = strdup (cmd.c_str());
  71                 }
  72         }
  73         else
  74         {
  75                 if (_session->save_state (timebuf)) {
  76                         event->flags = JackSessionSaveError;
  77                 } else {
  78                         std::string xml_path (_session->session_directory().root_path());
  79                         std::string legalized_filename = legalize_for_path (timebuf) + statefile_suffix;
  80                         xml_path = Glib::build_filename (xml_path, legalized_filename);
  81
  82                         string cmd ("ardour3 -P -U ");
  83                         cmd += event->client_uuid;
  84                         cmd += " \"";
  85                         cmd += xml_path;
  86                         cmd += '\"';
  87
  88                         event->command_line = strdup (cmd.c_str());
  89                 }
  90         }
  91
  92         /* this won't be called if the port engine in use is not JACK, so we do
  93            not have to worry about the type of PortEngine::private_handle()
  94         */
  95
  96         jack_client_t* jack_client = (jack_client_t*) AudioEngine::instance()->port_engine().private_handle();
  97
  98         if (jack_client) {
  99                 jack_session_reply (jack_client, event);
 100         }
 101
 102         if (event->type == JackSessionSaveAndQuit) {
 103                 _session->Quit (); /* EMIT SIGNAL */
 104         }
 105
 106         jack_session_event_free (event);
 107 }
 108
 109 void
 110 JACKSession::timebase_callback (jack_transport_state_t /*state*/,
 111                                  pframes_t /*nframes*/,
 112                                  jack_position_t* pos,
 113                                  int /*new_position*/)
 114 {
 115         Timecode::BBT_Time bbt;
 116         TempoMap& tempo_map (_session->tempo_map());
 117         framepos_t tf = _session->transport_frame ();
 118
 119         /* BBT info */
 120
 121         TempoMetric metric (tempo_map.metric_at (tf));
 122
 123         try {
 124                 tempo_map.bbt_time (tf, bbt);
 125
 126                 pos->bar = bbt.bars;
 127                 pos->beat = bbt.beats;
 128                 pos->tick = bbt.ticks;
 129
 130                 // XXX still need to set bar_start_tick
 131
 132                 pos->beats_per_bar = metric.meter().divisions_per_bar();
 133                 pos->beat_type = metric.meter().note_divisor();
 134                 pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
 135                 pos->beats_per_minute = metric.tempo().beats_per_minute();
 136
 137                 pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
 138
 139         } catch (...) {
 140                 /* no message */
 141         }
 142
 143 #ifdef HAVE_JACK_VIDEO_SUPPORT
 144         //poke audio video ratio so Ardour can track Video Sync
 145         pos->audio_frames_per_video_frame = _session->frame_rate() / _session->timecode_frames_per_second();
 146         pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
 147 #endif
 148
 149 #ifdef HAVE_JACK_TIMCODE_SUPPORT
 150         /* This is not yet defined in JACK */
 151
 152         /* Timecode info */
 153
 154         pos->timecode_offset = _session->config.get_timecode_offset();
 155         t.timecode_frame_rate = _session->timecode_frames_per_second();
 156         pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode);
 157 #endif
 158
 159 #ifdef HAVE_JACK_LOOPING_SUPPORT
 160         /* This is not yet defined in JACK */
 161         if (_transport_speed) {
 162
 163                 if (play_loop) {
 164
 165                         Location* location = _session->locations()->auto_loop_location();
 166
 167                         if (location) {
 168
 169                                 t.transport_state = JackTransportLooping;
 170                                 t.loop_start = location->start();
 171                                 t.loop_end = location->end();
 172                                 t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
 173
 174                         } else {
 175
 176                                 t.loop_start = 0;
 177                                 t.loop_end = 0;
 178                                 t.transport_state = JackTransportRolling;
 179
 180                         }
 181
 182                 } else {
 183
 184                         t.loop_start = 0;
 185                         t.loop_end = 0;
 186                         t.transport_state = JackTransportRolling;
 187
 188                 }
 189
 190         }
 191 #endif
 192 }
 193