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 <jack/jack.h>
  26 #include <jack/transport.h>
  27
  28 #include "ardour/audioengine.h"
  29 #include "ardour/filename_extensions.h"
  30 #include "ardour/session.h"
  31 #include "ardour/session_directory.h"
  32 #include "ardour/tempo.h"
  33
  34 #include "jack_session.h"
  35
  36 using namespace ARDOUR;
  37 using std::string;
  38
  39 JACKSession::JACKSession (Session* s)
  40         : SessionHandlePtr (s)
  41 {
  42 }
  43
  44 JACKSession::~JACKSession ()
  45 {
  46 }
  47
  48 void
  49 JACKSession::session_event (jack_session_event_t* event)
  50 {
  51         char timebuf[128], *tmp;
  52         time_t n;
  53         struct tm local_time;
  54
  55         time (&n);
  56         localtime_r (&n, &local_time);
  57         strftime (timebuf, sizeof(timebuf), "JS_%FT%T", &local_time);
  58
  59         while ((tmp = strchr(timebuf, ':'))) { *tmp = '.'; }
  60
  61         if (event->type == JackSessionSaveTemplate)
  62         {
  63                 if (_session->save_template( timebuf )) {
  64                         event->flags = JackSessionSaveError;
  65                 } else {
  66                         string cmd ("ardour3 -P -U ");
  67                         cmd += event->client_uuid;
  68                         cmd += " -T ";
  69                         cmd += timebuf;
  70
  71                         event->command_line = strdup (cmd.c_str());
  72                 }
  73         }
  74         else
  75         {
  76                 if (_session->save_state (timebuf)) {
  77                         event->flags = JackSessionSaveError;
  78                 } else {
  79                         std::string xml_path (_session->session_directory().root_path());
  80                         std::string legalized_filename = legalize_for_path (timebuf) + statefile_suffix;
  81                         xml_path = Glib::build_filename (xml_path, legalized_filename);
  82
  83                         string cmd ("ardour3 -P -U ");
  84                         cmd += event->client_uuid;
  85                         cmd += " \"";
  86                         cmd += xml_path;
  87                         cmd += '\"';
  88
  89                         event->command_line = strdup (cmd.c_str());
  90                 }
  91         }
  92
  93         /* this won't be called if the port engine in use is not JACK, so we do
  94            not have to worry about the type of PortEngine::private_handle()
  95         */
  96
  97         jack_client_t* jack_client = (jack_client_t*) AudioEngine::instance()->port_engine().private_handle();
  98
  99         if (jack_client) {
 100                 jack_session_reply (jack_client, event);
 101         }
 102
 103         if (event->type == JackSessionSaveAndQuit) {
 104                 _session->Quit (); /* EMIT SIGNAL */
 105         }
 106
 107         jack_session_event_free (event);
 108 }
 109
 110 void
 111 JACKSession::timebase_callback (jack_transport_state_t /*state*/,
 112                                  pframes_t /*nframes*/,
 113                                  jack_position_t* pos,
 114                                  int /*new_position*/)
 115 {
 116         Timecode::BBT_Time bbt;
 117         TempoMap& tempo_map (_session->tempo_map());
 118         framepos_t tf = _session->transport_frame ();
 119
 120         /* BBT info */
 121
 122         TempoMetric metric (tempo_map.metric_at (tf));
 123
 124         try {
 125                 tempo_map.bbt_time_rt (tf, bbt);
 126
 127                 pos->bar = bbt.bars;
 128                 pos->beat = bbt.beats;
 129                 pos->tick = bbt.ticks;
 130
 131                 // XXX still need to set bar_start_tick
 132
 133                 pos->beats_per_bar = metric.meter().divisions_per_bar();
 134                 pos->beat_type = metric.meter().note_divisor();
 135                 pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
 136                 pos->beats_per_minute = metric.tempo().beats_per_minute();
 137
 138                 pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
 139
 140         } catch (...) {
 141                 /* no message */
 142         }
 143
 144 #ifdef HAVE_JACK_VIDEO_SUPPORT
 145         //poke audio video ratio so Ardour can track Video Sync
 146         pos->audio_frames_per_video_frame = _session->frame_rate() / _session->timecode_frames_per_second();
 147         pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
 148 #endif
 149
 150 #ifdef HAVE_JACK_TIMCODE_SUPPORT
 151         /* This is not yet defined in JACK */
 152
 153         /* Timecode info */
 154
 155         pos->timecode_offset = _session->config.get_timecode_offset();
 156         t.timecode_frame_rate = _session->timecode_frames_per_second();
 157         pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode);
 158 #endif
 159
 160 #ifdef HAVE_JACK_LOOPING_SUPPORT
 161         /* This is not yet defined in JACK */
 162         if (_transport_speed) {
 163
 164                 if (play_loop) {
 165
 166                         Location* location = _session->locations()->auto_loop_location();
 167
 168                         if (location) {
 169
 170                                 t.transport_state = JackTransportLooping;
 171                                 t.loop_start = location->start();
 172                                 t.loop_end = location->end();
 173                                 t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
 174
 175                         } else {
 176
 177                                 t.loop_start = 0;
 178                                 t.loop_end = 0;
 179                                 t.transport_state = JackTransportRolling;
 180
 181                         }
 182
 183                 } else {
 184
 185                         t.loop_start = 0;
 186                         t.loop_end = 0;
 187                         t.transport_state = JackTransportRolling;
 188
 189                 }
 190
 191         }
 192 #endif
 193 }
 194