enough with umpteen "i18n.h" files. Consolidate on pbd/i18n.h
[ardour.git] / libs / ardour / session_export.cc
1 /*
2     Copyright (C) 1999-2008 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 "pbd/error.h"
22 #include <glibmm/threads.h>
23
24 #include <midi++/mmc.h>
25
26 #include "ardour/audioengine.h"
27 #include "ardour/butler.h"
28 #include "ardour/export_handler.h"
29 #include "ardour/export_status.h"
30 #include "ardour/process_thread.h"
31 #include "ardour/session.h"
32 #include "ardour/track.h"
33
34 #include "pbd/i18n.h"
35
36 using namespace std;
37 using namespace ARDOUR;
38 using namespace PBD;
39
40 boost::shared_ptr<ExportHandler>
41 Session::get_export_handler ()
42 {
43         if (!export_handler) {
44                 export_handler.reset (new ExportHandler (*this));
45         }
46
47         return export_handler;
48 }
49
50 boost::shared_ptr<ExportStatus>
51 Session::get_export_status ()
52 {
53         if (!export_status) {
54                 export_status.reset (new ExportStatus ());
55         }
56
57         return export_status;
58 }
59
60
61 int
62 Session::pre_export ()
63 {
64         get_export_status (); // Init export_status
65
66         /* take everyone out of awrite to avoid disasters */
67
68         {
69                 boost::shared_ptr<RouteList> r = routes.reader ();
70
71                 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
72                         (*i)->protect_automation ();
73                 }
74         }
75
76         /* prepare transport */
77
78         realtime_stop (true, true);
79
80         if (get_record_enabled()) {
81                 disable_record (false);
82         }
83
84         unset_play_loop ();
85
86         /* no slaving */
87
88         post_export_sync = config.get_external_sync ();
89         post_export_position = _transport_frame;
90
91         config.set_external_sync (false);
92
93         _exporting = true;
94         export_status->set_running (true);
95         export_status->Finished.connect_same_thread (*this, boost::bind (&Session::finalize_audio_export, this));
96
97         /* disable MMC output early */
98
99         _pre_export_mmc_enabled = _mmc->send_enabled ();
100         _mmc->enable_send (false);
101
102         return 0;
103 }
104
105 /** Called for each range that is being exported */
106 int
107 Session::start_audio_export (framepos_t position, bool realtime)
108 {
109         if (!_exporting) {
110                 pre_export ();
111         }
112
113         _realtime_export = realtime;
114
115         if (realtime) {
116                 _export_preroll = nominal_frame_rate ();
117         } else {
118                 _export_preroll = Config->get_export_preroll() * nominal_frame_rate ();
119         }
120
121         if (_export_preroll == 0) {
122                 // must be > 0 so that transport is started in sync.
123                 _export_preroll = 1;
124         }
125
126         /* "worst_track_latency" is the correct value for stem-exports
127          * see to Route::add_export_point(),
128          *
129          * for master-bus export, we'd need to add the master's latency.
130          * or actually longest-total-session-latency.
131          *
132          * We can't use worst_playback_latency because that includes
133          * includes external latencies and would overcompensate.
134          */
135         _export_latency = worst_track_latency ();
136
137         /* We're about to call Track::seek, so the butler must have finished everything
138            up otherwise it could be doing do_refill in its thread while we are doing
139            it here.
140         */
141
142         _butler->wait_until_finished ();
143
144         /* get everyone to the right position */
145
146         {
147                 boost::shared_ptr<RouteList> rl = routes.reader();
148
149                 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
150                         boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
151                         if (tr && tr->seek (position, true)) {
152                                 error << string_compose (_("%1: cannot seek to %2 for export"),
153                                                   (*i)->name(), position)
154                                       << endmsg;
155                                 return -1;
156                         }
157                 }
158         }
159
160         /* we just did the core part of a locate() call above, but
161            for the sake of any GUI, put the _transport_frame in
162            the right place too.
163         */
164
165         _transport_frame = position;
166         export_status->stop = false;
167
168         /* get transport ready. note how this is calling butler functions
169            from a non-butler thread. we waited for the butler to stop
170            what it was doing earlier in Session::pre_export() and nothing
171            since then has re-awakened it.
172          */
173
174         /* we are ready to go ... */
175
176         if (!_engine.connected()) {
177                 return -1;
178         }
179
180         if (_realtime_export) {
181                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
182                 _export_rolling = true;
183                 process_function = &Session::process_export_fw;
184                 return 0;
185         } else {
186                 _engine.Freewheel.connect_same_thread (export_freewheel_connection, boost::bind (&Session::process_export_fw, this, _1));
187                 _export_rolling = true;
188                 return _engine.freewheel (true);
189         }
190 }
191
192 void
193 Session::process_export (pframes_t nframes)
194 {
195         if (_export_rolling && export_status->stop) {
196                 stop_audio_export ();
197         }
198
199         if (_export_rolling) {
200                 /* make sure we've caught up with disk i/o, since
201                 we're running faster than realtime c/o JACK.
202                 */
203                 _butler->wait_until_finished ();
204
205                 /* do the usual stuff */
206
207                 process_without_events (nframes);
208         }
209
210         try {
211                 /* handle export - XXX what about error handling? */
212
213                 ProcessExport (nframes);
214
215         } catch (std::exception & e) {
216                 error << string_compose (_("Export ended unexpectedly: %1"), e.what()) << endmsg;
217                 export_status->abort (true);
218         }
219 }
220
221 void
222 Session::process_export_fw (pframes_t nframes)
223 {
224         if (_export_preroll > 0) {
225
226                 if (!_realtime_export) {
227                         _engine.main_thread()->get_buffers ();
228                 }
229                 fail_roll (nframes);
230                 if (!_realtime_export) {
231                         _engine.main_thread()->drop_buffers ();
232                 }
233
234                 _export_preroll -= std::min ((framepos_t)nframes, _export_preroll);
235
236                 if (_export_preroll > 0) {
237                         // clear out buffers (reverb tails etc).
238                         return;
239                 }
240
241                 set_transport_speed (1.0, 0, false);
242                 butler_transport_work ();
243                 g_atomic_int_set (&_butler->should_do_transport_work, 0);
244                 post_transport ();
245
246                 return;
247         }
248
249         if (_export_latency > 0) {
250                 framepos_t remain = std::min ((framepos_t)nframes, _export_latency);
251
252                 if (!_realtime_export) {
253                         _engine.main_thread()->get_buffers ();
254                 }
255                 process_without_events (remain);
256                 if (!_realtime_export) {
257                         _engine.main_thread()->drop_buffers ();
258                 }
259
260                 _export_latency -= remain;
261                 nframes -= remain;
262
263                 if (nframes == 0) {
264                         return;
265                 }
266         }
267         if (!_realtime_export) {
268                 _engine.main_thread()->get_buffers ();
269         }
270         process_export (nframes);
271         if (!_realtime_export) {
272                 _engine.main_thread()->drop_buffers ();
273         }
274
275         return;
276 }
277
278 int
279 Session::stop_audio_export ()
280 {
281         /* can't use stop_transport() here because we need
282            an immediate halt and don't require all the declick
283            stuff that stop_transport() implements.
284         */
285
286         realtime_stop (true, true);
287         _export_rolling = false;
288         _butler->schedule_transport_work ();
289
290         return 0;
291 }
292
293 void
294 Session::finalize_audio_export ()
295 {
296         _exporting = false;
297
298         if (_export_rolling) {
299                 stop_audio_export ();
300         }
301
302         /* Clean up */
303
304         if (_realtime_export) {
305                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
306                 process_function = &Session::process_with_events;
307         } else {
308                 _engine.freewheel (false);
309                 export_freewheel_connection.disconnect();
310         }
311
312         _mmc->enable_send (_pre_export_mmc_enabled);
313
314         /* maybe write CUE/TOC */
315
316         export_handler.reset();
317         export_status.reset();
318
319         /* restart slaving */
320
321         if (post_export_sync) {
322                 config.set_external_sync (true);
323         } else {
324                 locate (post_export_position, false, false, false, false, false);
325         }
326 }