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 "pbd/localtime_r.h"
  29
  30 #include "ardour/audioengine.h"
  31 #include "ardour/filename_extensions.h"
  32 #include "ardour/session.h"
  33 #include "ardour/session_directory.h"
  34 #include "ardour/tempo.h"
  35
  36 #include "jack_session.h"
  37
  38 using namespace ARDOUR;
  39 using std::string;
  40
  41 JACKSession::JACKSession (Session* s)
  42         : SessionHandlePtr (s)
  43 {
  44 }
  45
  46 JACKSession::~JACKSession ()
  47 {
  48 }
  49
  50 void
  51 JACKSession::session_event (jack_session_event_t* event)
  52 {
  53         char timebuf[128], *tmp;
  54         time_t n;
  55         struct tm local_time;
  56
  57         time (&n);
  58         localtime_r (&n, &local_time);
  59         strftime (timebuf, sizeof(timebuf), "JS_%FT%T", &local_time);
  60
  61         while ((tmp = strchr(timebuf, ':'))) { *tmp = '.'; }
  62
  63         if (event->type == JackSessionSaveTemplate)
  64         {
  65                 if (_session->save_template( timebuf )) {
  66                         event->flags = JackSessionSaveError;
  67                 } else {
  68                         string cmd ("ardour3 -P -U ");
  69                         cmd += event->client_uuid;
  70                         cmd += " -T ";
  71                         cmd += timebuf;
  72
  73                         event->command_line = strdup (cmd.c_str());
  74                 }
  75         }
  76         else
  77         {
  78                 if (_session->save_state (timebuf)) {
  79                         event->flags = JackSessionSaveError;
  80                 } else {
  81                         std::string xml_path (_session->session_directory().root_path());
  82                         std::string legalized_filename = legalize_for_path (timebuf) + statefile_suffix;
  83                         xml_path = Glib::build_filename (xml_path, legalized_filename);
  84
  85                         string cmd ("ardour3 -P -U ");
  86                         cmd += event->client_uuid;
  87                         cmd += " \"";
  88                         cmd += xml_path;
  89                         cmd += '\"';
  90
  91                         event->command_line = strdup (cmd.c_str());
  92                 }
  93         }
  94
  95         /* this won't be called if the port engine in use is not JACK, so we do
  96            not have to worry about the type of PortEngine::private_handle()
  97         */
  98
  99         jack_client_t* jack_client = (jack_client_t*) AudioEngine::instance()->port_engine().private_handle();
 100
 101         if (jack_client) {
 102                 jack_session_reply (jack_client, event);
 103         }
 104
 105         if (event->type == JackSessionSaveAndQuit) {
 106                 _session->Quit (); /* EMIT SIGNAL */
 107         }
 108
 109         jack_session_event_free (event);
 110 }
 111
 112 void
 113 JACKSession::timebase_callback (jack_transport_state_t /*state*/,
 114                                  pframes_t /*nframes*/,
 115                                  jack_position_t* pos,
 116                                  int /*new_position*/)
 117 {
 118         Timecode::BBT_Time bbt;
 119         TempoMap& tempo_map (_session->tempo_map());
 120         framepos_t tf = _session->transport_frame ();
 121
 122         /* BBT info */
 123
 124         TempoMetric metric (tempo_map.metric_at (tf));
 125
 126         try {
 127                 tempo_map.bbt_time_rt (tf, bbt);
 128
 129                 pos->bar = bbt.bars;
 130                 pos->beat = bbt.beats;
 131                 pos->tick = bbt.ticks;
 132
 133                 // XXX still need to set bar_start_tick
 134
 135                 pos->beats_per_bar = metric.meter().divisions_per_bar();
 136                 pos->beat_type = metric.meter().note_divisor();
 137                 pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
 138                 pos->beats_per_minute = metric.tempo().beats_per_minute();
 139
 140                 pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
 141
 142         } catch (...) {
 143                 /* no message */
 144         }
 145
 146 #ifdef HAVE_JACK_VIDEO_SUPPORT
 147         //poke audio video ratio so Ardour can track Video Sync
 148         pos->audio_frames_per_video_frame = _session->frame_rate() / _session->timecode_frames_per_second();
 149         pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
 150 #endif
 151
 152 #ifdef HAVE_JACK_TIMCODE_SUPPORT
 153         /* This is not yet defined in JACK */
 154
 155         /* Timecode info */
 156
 157         pos->timecode_offset = _session->config.get_timecode_offset();
 158         t.timecode_frame_rate = _session->timecode_frames_per_second();
 159         pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode);
 160 #endif
 161
 162 #ifdef HAVE_JACK_LOOPING_SUPPORT
 163         /* This is not yet defined in JACK */
 164         if (_transport_speed) {
 165
 166                 if (play_loop) {
 167
 168                         Location* location = _session->locations()->auto_loop_location();
 169
 170                         if (location) {
 171
 172                                 t.transport_state = JackTransportLooping;
 173                                 t.loop_start = location->start();
 174                                 t.loop_end = location->end();
 175                                 t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
 176
 177                         } else {
 178
 179                                 t.loop_start = 0;
 180                                 t.loop_end = 0;
 181                                 t.transport_state = JackTransportRolling;
 182
 183                         }
 184
 185                 } else {
 186
 187                         t.loop_start = 0;
 188                         t.loop_end = 0;
 189                         t.transport_state = JackTransportRolling;
 190
 191                 }
 192
 193         }
 194 #endif
 195 }
 196