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 ()
70 /* Destructors must not throw exceptions; anything bad
71 happening now is too late to worry about anyway,
80 weak_ptr<J2KEncoder> wp = shared_from_this ();
81 _server_found_connection = EncodeServerFinder::instance()->ServersListChanged.connect (
82 boost::bind (&J2KEncoder::call_servers_list_changed, wp)
86 /* We don't want the servers-list-changed callback trying to do things
87 during destruction of J2KEncoder, and I think this is the neatest way
91 J2KEncoder::call_servers_list_changed (weak_ptr<J2KEncoder> encoder)
93 shared_ptr<J2KEncoder> e = encoder.lock ();
95 e->servers_list_changed ();
102 boost::mutex::scoped_lock lock (_queue_mutex);
104 LOG_GENERAL (N_("Clearing queue of %1"), _queue.size ());
106 /* Keep waking workers until the queue is empty */
107 while (!_queue.empty ()) {
109 _empty_condition.notify_all ();
110 _full_condition.wait (lock);
115 LOG_GENERAL_NC (N_("Terminating encoder threads"));
117 terminate_threads ();
119 LOG_GENERAL (N_("Mopping up %1"), _queue.size());
121 /* The following sequence of events can occur in the above code:
122 1. a remote worker takes the last image off the queue
123 2. the loop above terminates
124 3. the remote worker fails to encode the image and puts it back on the queue
125 4. the remote worker is then terminated by terminate_threads
127 So just mop up anything left in the queue here.
130 for (list<shared_ptr<DCPVideo> >::iterator i = _queue.begin(); i != _queue.end(); ++i) {
131 LOG_GENERAL (N_("Encode left-over frame %1"), (*i)->index ());
134 (*i)->encode_locally(),
139 } catch (std::exception& e) {
140 LOG_ERROR (N_("Local encode failed (%1)"), e.what ());
145 /** @return an estimate of the current number of frames we are encoding per second,
149 J2KEncoder::current_encoding_rate () const
151 return _history.rate ();
154 /** @return Number of video frames that have been queued for encoding */
156 J2KEncoder::video_frames_enqueued () const
158 if (!_last_player_video_time) {
162 return _last_player_video_time->frames_floor (_film->video_frame_rate ());
165 /** Should be called when a frame has been encoded successfully */
167 J2KEncoder::frame_done ()
172 /** Called to request encoding of the next video frame in the DCP. This is called in order,
173 * so each time the supplied frame is the one after the previous one.
174 * pv represents one video frame, and could be empty if there is nothing to encode
175 * for this DCP frame.
177 * @param pv PlayerVideo to encode.
178 * @param time Time of \p pv within the DCP.
181 J2KEncoder::encode (shared_ptr<PlayerVideo> pv, DCPTime time)
187 boost::mutex::scoped_lock threads_lock (_threads_mutex);
188 threads = _threads.size ();
191 boost::mutex::scoped_lock queue_lock (_queue_mutex);
193 /* Wait until the queue has gone down a bit. Allow one thing in the queue even
194 when there are no threads.
196 while (_queue.size() >= (threads * 2) + 1) {
197 LOG_TIMING ("decoder-sleep queue=%1 threads=%2", _queue.size(), threads);
198 _full_condition.wait (queue_lock);
199 LOG_TIMING ("decoder-wake queue=%1 threads=%2", _queue.size(), threads);
203 /* Re-throw any exception raised by one of our threads. If more
204 than one has thrown an exception, only one will be rethrown, I think;
205 but then, if that happens something has gone badly wrong.
209 Frame const position = time.frames_floor(_film->video_frame_rate());
211 if (_writer->can_fake_write (position)) {
212 /* We can fake-write this frame */
213 LOG_DEBUG_ENCODE("Frame @ %1 FAKE", to_string(time));
214 _writer->fake_write (position, pv->eyes ());
216 } else if (pv->has_j2k() && !_film->reencode_j2k()) {
217 LOG_DEBUG_ENCODE("Frame @ %1 J2K", to_string(time));
218 /* This frame already has J2K data, so just write it */
219 _writer->write (pv->j2k(), position, pv->eyes ());
220 } else if (_last_player_video[pv->eyes()] && _writer->can_repeat(position) && pv->same (_last_player_video[pv->eyes()])) {
221 LOG_DEBUG_ENCODE("Frame @ %1 REPEAT", to_string(time));
222 _writer->repeat (position, pv->eyes ());
224 LOG_DEBUG_ENCODE("Frame @ %1 ENCODE", to_string(time));
225 /* Queue this new frame for encoding */
226 LOG_TIMING ("add-frame-to-queue queue=%1", _queue.size ());
227 _queue.push_back (shared_ptr<DCPVideo> (
231 _film->video_frame_rate(),
232 _film->j2k_bandwidth(),
237 /* The queue might not be empty any more, so notify anything which is
240 _empty_condition.notify_all ();
243 _last_player_video[pv->eyes()] = pv;
244 _last_player_video_time = time;
248 J2KEncoder::terminate_threads ()
250 boost::mutex::scoped_lock threads_lock (_threads_mutex);
253 for (list<boost::thread>::iterator i = _threads.begin(); i != _threads.end(); ++i) {
254 /* Be careful not to throw in here otherwise _threads will not be clear()ed */
255 LOG_GENERAL ("Terminating thread %1 of %2", n + 1, _threads.size ());
259 } catch (exception& e) {
260 LOG_ERROR ("join() threw an exception: %1", e.what());
262 LOG_ERROR_NC ("join() threw an exception");
264 LOG_GENERAL_NC ("Thread terminated");
272 J2KEncoder::encoder_thread (optional<EncodeServerDescription> server)
276 LOG_TIMING ("start-encoder-thread thread=%1 server=%2", thread_id (), server->host_name ());
278 LOG_TIMING ("start-encoder-thread thread=%1 server=localhost", thread_id ());
281 /* Number of seconds that we currently wait between attempts
282 to connect to the server; not relevant for localhost
285 int remote_backoff = 0;
289 LOG_TIMING ("encoder-sleep thread=%1", thread_id ());
290 boost::mutex::scoped_lock lock (_queue_mutex);
291 while (_queue.empty ()) {
292 _empty_condition.wait (lock);
295 LOG_TIMING ("encoder-wake thread=%1 queue=%2", thread_id(), _queue.size());
296 shared_ptr<DCPVideo> vf = _queue.front ();
298 /* We're about to commit to either encoding this frame or putting it back onto the queue,
299 so we must not be interrupted until one or other of these things have happened. This
300 block has thread interruption disabled.
303 boost::this_thread::disable_interruption dis;
305 LOG_TIMING ("encoder-pop thread=%1 frame=%2 eyes=%3", thread_id(), vf->index(), (int) vf->eyes ());
310 optional<Data> encoded;
312 /* We need to encode this input */
315 encoded = vf->encode_remotely (server.get ());
317 if (remote_backoff > 0) {
318 LOG_GENERAL ("%1 was lost, but now she is found; removing backoff", server->host_name ());
321 /* This job succeeded, so remove any backoff */
324 } catch (std::exception& e) {
325 if (remote_backoff < 60) {
327 remote_backoff += 10;
330 N_("Remote encode of %1 on %2 failed (%3); thread sleeping for %4s"),
331 vf->index(), server->host_name(), e.what(), remote_backoff
337 LOG_TIMING ("start-local-encode thread=%1 frame=%2", thread_id(), vf->index());
338 encoded = vf->encode_locally ();
339 LOG_TIMING ("finish-local-encode thread=%1 frame=%2", thread_id(), vf->index());
340 } catch (std::exception& e) {
341 /* This is very bad, so don't cope with it, just pass it on */
342 LOG_ERROR (N_("Local encode failed (%1)"), e.what ());
348 _writer->write (encoded.get(), vf->index (), vf->eyes ());
352 LOG_GENERAL (N_("[%1] J2KEncoder thread pushes frame %2 back onto queue after failure"), thread_id(), vf->index());
353 _queue.push_front (vf);
358 if (remote_backoff > 0) {
359 boost::this_thread::sleep (boost::posix_time::seconds (remote_backoff));
362 /* The queue might not be full any more, so notify anything that is waiting on that */
364 _full_condition.notify_all ();
367 catch (boost::thread_interrupted& e) {
368 /* Ignore these and just stop the thread */
369 _full_condition.notify_all ();
374 /* Wake anything waiting on _full_condition so it can see the exception */
375 _full_condition.notify_all ();
379 J2KEncoder::servers_list_changed ()
381 terminate_threads ();
383 /* XXX: could re-use threads */
385 boost::mutex::scoped_lock lm (_threads_mutex);
387 #ifdef BOOST_THREAD_PLATFORM_WIN32
389 info.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
390 GetVersionEx (&info);
391 bool const windows_xp = (info.dwMajorVersion == 5 && info.dwMinorVersion == 1);
393 LOG_GENERAL_NC (N_("Setting thread affinity for Windows XP"));
397 if (!Config::instance()->only_servers_encode ()) {
398 for (int i = 0; i < Config::instance()->master_encoding_threads (); ++i) {
399 _threads.push_back (boost::thread(boost::bind(&J2KEncoder::encoder_thread, this, optional<EncodeServerDescription>())));
400 #ifdef DCPOMATIC_LINUX
401 pthread_setname_np (_threads.back().native_handle(), "encode-worker");
403 #ifdef BOOST_THREAD_PLATFORM_WIN32
405 SetThreadAffinityMask (_threads.back().native_handle(), 1 << i);
411 BOOST_FOREACH (EncodeServerDescription i, EncodeServerFinder::instance()->servers()) {
412 if (!i.current_link_version()) {
416 LOG_GENERAL (N_("Adding %1 worker threads for remote %2"), i.threads(), i.host_name ());
417 for (int j = 0; j < i.threads(); ++j) {
418 _threads.push_back (boost::thread(boost::bind(&J2KEncoder::encoder_thread, this, i)));
422 _writer->set_encoder_threads (_threads.size ());