2 Copyright (C) 2012-2019 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/j2k_encoder.cc
22 * @brief J2K encoder class.
25 #include "j2k_encoder.h"
29 #include "dcpomatic_log.h"
31 #include "dcp_video.h"
34 #include "encode_server_finder.h"
36 #include "player_video.h"
37 #include "encode_server_description.h"
38 #include "compose.hpp"
39 #include <libcxml/cxml.h>
40 #include <boost/foreach.hpp>
48 using boost::shared_ptr;
49 using boost::weak_ptr;
50 using boost::optional;
52 using namespace dcpomatic;
54 /** @param film Film that we are encoding.
55 * @param writer Writer that we are using.
57 J2KEncoder::J2KEncoder (shared_ptr<const Film> film, shared_ptr<Writer> writer)
62 servers_list_changed ();
65 J2KEncoder::~J2KEncoder ()
73 weak_ptr<J2KEncoder> wp = shared_from_this ();
74 _server_found_connection = EncodeServerFinder::instance()->ServersListChanged.connect (
75 boost::bind (&J2KEncoder::call_servers_list_changed, wp)
79 /* We don't want the servers-list-changed callback trying to do things
80 during destruction of J2KEncoder, and I think this is the neatest way
84 J2KEncoder::call_servers_list_changed (weak_ptr<J2KEncoder> encoder)
86 shared_ptr<J2KEncoder> e = encoder.lock ();
88 e->servers_list_changed ();
95 boost::mutex::scoped_lock lock (_queue_mutex);
97 LOG_GENERAL (N_("Clearing queue of %1"), _queue.size ());
99 /* Keep waking workers until the queue is empty */
100 while (!_queue.empty ()) {
102 _empty_condition.notify_all ();
103 _full_condition.wait (lock);
108 LOG_GENERAL_NC (N_("Terminating encoder threads"));
110 terminate_threads ();
112 /* Something might have been thrown during terminate_threads */
115 LOG_GENERAL (N_("Mopping up %1"), _queue.size());
117 /* The following sequence of events can occur in the above code:
118 1. a remote worker takes the last image off the queue
119 2. the loop above terminates
120 3. the remote worker fails to encode the image and puts it back on the queue
121 4. the remote worker is then terminated by terminate_threads
123 So just mop up anything left in the queue here.
126 for (list<shared_ptr<DCPVideo> >::iterator i = _queue.begin(); i != _queue.end(); ++i) {
127 LOG_GENERAL (N_("Encode left-over frame %1"), (*i)->index ());
130 shared_ptr<dcp::Data>(new dcp::ArrayData((*i)->encode_locally())),
135 } catch (std::exception& e) {
136 LOG_ERROR (N_("Local encode failed (%1)"), e.what ());
141 /** @return an estimate of the current number of frames we are encoding per second,
145 J2KEncoder::current_encoding_rate () const
147 return _history.rate ();
150 /** @return Number of video frames that have been queued for encoding */
152 J2KEncoder::video_frames_enqueued () const
154 if (!_last_player_video_time) {
158 return _last_player_video_time->frames_floor (_film->video_frame_rate ());
161 /** Should be called when a frame has been encoded successfully */
163 J2KEncoder::frame_done ()
168 /** Called to request encoding of the next video frame in the DCP. This is called in order,
169 * so each time the supplied frame is the one after the previous one.
170 * pv represents one video frame, and could be empty if there is nothing to encode
171 * for this DCP frame.
173 * @param pv PlayerVideo to encode.
174 * @param time Time of \p pv within the DCP.
177 J2KEncoder::encode (shared_ptr<PlayerVideo> pv, DCPTime time)
183 boost::mutex::scoped_lock lm (_threads_mutex);
184 threads = _threads->size();
187 boost::mutex::scoped_lock queue_lock (_queue_mutex);
189 /* Wait until the queue has gone down a bit. Allow one thing in the queue even
190 when there are no threads.
192 while (_queue.size() >= (threads * 2) + 1) {
193 LOG_TIMING ("decoder-sleep queue=%1 threads=%2", _queue.size(), threads);
194 _full_condition.wait (queue_lock);
195 LOG_TIMING ("decoder-wake queue=%1 threads=%2", _queue.size(), threads);
199 /* Re-throw any exception raised by one of our threads. If more
200 than one has thrown an exception, only one will be rethrown, I think;
201 but then, if that happens something has gone badly wrong.
205 Frame const position = time.frames_floor(_film->video_frame_rate());
207 if (_writer->can_fake_write (position)) {
208 /* We can fake-write this frame */
209 LOG_DEBUG_ENCODE("Frame @ %1 FAKE", to_string(time));
210 _writer->fake_write (position, pv->eyes ());
212 } else if (pv->has_j2k() && !_film->reencode_j2k()) {
213 LOG_DEBUG_ENCODE("Frame @ %1 J2K", to_string(time));
214 /* This frame already has J2K data, so just write it */
215 _writer->write (pv->j2k(), position, pv->eyes ());
216 } else if (_last_player_video[pv->eyes()] && _writer->can_repeat(position) && pv->same (_last_player_video[pv->eyes()])) {
217 LOG_DEBUG_ENCODE("Frame @ %1 REPEAT", to_string(time));
218 _writer->repeat (position, pv->eyes ());
220 LOG_DEBUG_ENCODE("Frame @ %1 ENCODE", to_string(time));
221 /* Queue this new frame for encoding */
222 LOG_TIMING ("add-frame-to-queue queue=%1", _queue.size ());
223 _queue.push_back (shared_ptr<DCPVideo> (
227 _film->video_frame_rate(),
228 _film->j2k_bandwidth(),
233 /* The queue might not be empty any more, so notify anything which is
236 _empty_condition.notify_all ();
239 _last_player_video[pv->eyes()] = pv;
240 _last_player_video_time = time;
244 J2KEncoder::terminate_threads ()
246 boost::this_thread::disable_interruption dis;
247 boost::mutex::scoped_lock lm (_threads_mutex);
253 _threads->interrupt_all ();
255 _threads->join_all ();
256 } catch (exception& e) {
257 LOG_ERROR ("join() threw an exception: %1", e.what());
259 LOG_ERROR_NC ("join() threw an exception");
266 J2KEncoder::encoder_thread (optional<EncodeServerDescription> server)
270 LOG_TIMING ("start-encoder-thread thread=%1 server=%2", thread_id (), server->host_name ());
272 LOG_TIMING ("start-encoder-thread thread=%1 server=localhost", thread_id ());
275 /* Number of seconds that we currently wait between attempts
276 to connect to the server; not relevant for localhost
279 int remote_backoff = 0;
283 LOG_TIMING ("encoder-sleep thread=%1", thread_id ());
284 boost::mutex::scoped_lock lock (_queue_mutex);
285 while (_queue.empty ()) {
286 _empty_condition.wait (lock);
289 LOG_TIMING ("encoder-wake thread=%1 queue=%2", thread_id(), _queue.size());
290 shared_ptr<DCPVideo> vf = _queue.front ();
292 /* We're about to commit to either encoding this frame or putting it back onto the queue,
293 so we must not be interrupted until one or other of these things have happened. This
294 block has thread interruption disabled.
297 boost::this_thread::disable_interruption dis;
299 LOG_TIMING ("encoder-pop thread=%1 frame=%2 eyes=%3", thread_id(), vf->index(), (int) vf->eyes ());
304 shared_ptr<Data> encoded;
306 /* We need to encode this input */
309 encoded.reset(new dcp::ArrayData(vf->encode_remotely(server.get())));
311 if (remote_backoff > 0) {
312 LOG_GENERAL ("%1 was lost, but now she is found; removing backoff", server->host_name ());
315 /* This job succeeded, so remove any backoff */
318 } catch (std::exception& e) {
319 if (remote_backoff < 60) {
321 remote_backoff += 10;
324 N_("Remote encode of %1 on %2 failed (%3); thread sleeping for %4s"),
325 vf->index(), server->host_name(), e.what(), remote_backoff
331 LOG_TIMING ("start-local-encode thread=%1 frame=%2", thread_id(), vf->index());
332 encoded.reset(new dcp::ArrayData(vf->encode_locally()));
333 LOG_TIMING ("finish-local-encode thread=%1 frame=%2", thread_id(), vf->index());
334 } catch (std::exception& e) {
335 /* This is very bad, so don't cope with it, just pass it on */
336 LOG_ERROR (N_("Local encode failed (%1)"), e.what ());
342 _writer->write (encoded, vf->index(), vf->eyes());
346 LOG_GENERAL (N_("[%1] J2KEncoder thread pushes frame %2 back onto queue after failure"), thread_id(), vf->index());
347 _queue.push_front (vf);
352 if (remote_backoff > 0) {
353 boost::this_thread::sleep (boost::posix_time::seconds (remote_backoff));
356 /* The queue might not be full any more, so notify anything that is waiting on that */
358 _full_condition.notify_all ();
361 catch (boost::thread_interrupted& e) {
362 /* Ignore these and just stop the thread */
363 _full_condition.notify_all ();
368 /* Wake anything waiting on _full_condition so it can see the exception */
369 _full_condition.notify_all ();
373 J2KEncoder::servers_list_changed ()
375 terminate_threads ();
376 _threads.reset (new boost::thread_group());
378 boost::mutex::scoped_lock lm (_threads_mutex);
380 /* XXX: could re-use threads */
382 if (!Config::instance()->only_servers_encode ()) {
383 for (int i = 0; i < Config::instance()->master_encoding_threads (); ++i) {
384 #ifdef DCPOMATIC_LINUX
385 boost::thread* t = _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, optional<EncodeServerDescription>()));
386 pthread_setname_np (t->native_handle(), "encode-worker");
388 _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, optional<EncodeServerDescription>()));
393 BOOST_FOREACH (EncodeServerDescription i, EncodeServerFinder::instance()->servers()) {
394 if (!i.current_link_version()) {
398 LOG_GENERAL (N_("Adding %1 worker threads for remote %2"), i.threads(), i.host_name ());
399 for (int j = 0; j < i.threads(); ++j) {
400 _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, i));
404 _writer->set_encoder_threads (_threads->size());