Rearrange encoder threading.
[dcpomatic.git] / src / lib / j2k_encoder.cc
index 1f0c606d1c854095281d24800671f76bfdddd0a5..8c7a1ef1be60c8c69babcc68d9bb03a450eb315c 100644 (file)
@@ -32,6 +32,9 @@
 #include "encode_server_description.h"
 #include "encode_server_finder.h"
 #include "film.h"
+#include "cpu_j2k_encoder_thread.h"
+#include "grok_j2k_encoder_thread.h"
+#include "remote_j2k_encoder_thread.h"
 #include "j2k_encoder.h"
 #include "log.h"
 #include "player_video.h"
@@ -44,6 +47,7 @@
 
 
 using std::cout;
+using std::dynamic_pointer_cast;
 using std::exception;
 using std::list;
 using std::make_shared;
@@ -53,6 +57,7 @@ using boost::optional;
 using dcp::Data;
 using namespace dcpomatic;
 
+
 static grk_plugin::GrokInitializer grokInitializer;
 
 /** @param film Film that we are encoding.
@@ -72,14 +77,24 @@ J2KEncoder::~J2KEncoder ()
 {
        _server_found_connection.disconnect();
 
-       {
-               boost::mutex::scoped_lock lm(_threads_mutex);
-               terminate_threads();
-       }
+       terminate_threads();
 
        delete _context;
 }
 
+
+void
+J2KEncoder::servers_list_changed()
+{
+       auto config = Config::instance();
+
+       auto const cpu = (config->enable_gpu() || config->only_servers_encode()) ? 0 : config->master_encoding_threads();
+       auto const gpu = config->enable_gpu() ? config->master_encoding_threads() : 0;
+
+       remake_threads(cpu, gpu, EncodeServerFinder::instance()->servers());
+}
+
+
 void
 J2KEncoder::begin ()
 {
@@ -97,10 +112,7 @@ J2KEncoder::pause()
                return;
        }
 
-       {
-               boost::mutex::scoped_lock lm (_threads_mutex);
-               terminate_threads ();
-       }
+       terminate_threads ();
 
        /* Something might have been thrown during terminate_threads */
        rethrow ();
@@ -131,17 +143,13 @@ J2KEncoder::end()
        /* Keep waking workers until the queue is empty */
        while (!_queue.empty ()) {
                rethrow ();
-               _empty_condition.notify_all ();
                _full_condition.wait (lock);
        }
        lock.unlock ();
 
        LOG_GENERAL_NC (N_("Terminating encoder threads"));
 
-       {
-               boost::mutex::scoped_lock lm (_threads_mutex);
-               terminate_threads ();
-       }
+       terminate_threads ();
 
        /* Something might have been thrown during terminate_threads */
        rethrow ();
@@ -167,7 +175,7 @@ J2KEncoder::end()
                        LOG_GENERAL(N_("Encode left-over frame %1"), i.index());
                        try {
                                _writer.write(
-                                               make_shared<dcp::ArrayData>(i.encode_locally()),
+                                       make_shared<dcp::ArrayData>(i.encode_locally()),
                                        i.index(),
                                        i.eyes()
                                        );
@@ -229,7 +237,7 @@ J2KEncoder::encode (shared_ptr<PlayerVideo> pv, DCPTime time)
        size_t threads = 0;
        {
                boost::mutex::scoped_lock lm (_threads_mutex);
-               threads = _threads->size();
+               threads = _threads.size();
        }
 
        boost::mutex::scoped_lock queue_lock (_queue_mutex);
@@ -289,181 +297,139 @@ J2KEncoder::encode (shared_ptr<PlayerVideo> pv, DCPTime time)
 }
 
 
-/** Caller must hold a lock on _threads_mutex */
 void
 J2KEncoder::terminate_threads ()
 {
+       boost::mutex::scoped_lock lm(_threads_mutex);
        boost::this_thread::disable_interruption dis;
 
-       if (!_threads) {
-               return;
-       }
-
-       _threads->interrupt_all ();
-       try {
-               _threads->join_all ();
-       } catch (exception& e) {
-               LOG_ERROR ("join() threw an exception: %1", e.what());
-       } catch (...) {
-               LOG_ERROR_NC ("join() threw an exception");
+       for (auto& thread: _threads) {
+               thread->stop();
        }
 
-       _threads.reset ();
+       _threads.clear();
+       _ending = true;
 }
 
 
 void
-J2KEncoder::encoder_thread (optional<EncodeServerDescription> server)
-try
+J2KEncoder::remake_threads(int cpu, int gpu, list<EncodeServerDescription> servers)
 {
-       auto config = Config::instance ();
+       boost::mutex::scoped_lock lm (_threads_mutex);
+       if (_ending) {
+               return;
+       }
 
-       start_of_thread ("J2KEncoder");
+       auto remove_threads = [this](int wanted, int current, std::function<bool (shared_ptr<J2KEncoderThread>)> predicate) {
+               for (auto i = wanted; i < current; ++i) {
+                       auto iter = std::find_if(_threads.begin(), _threads.end(), predicate);
+                       if (iter != _threads.end()) {
+                               (*iter)->stop();
+                               _threads.erase(iter);
+                       }
+               }
+       };
 
-       if (server) {
-               LOG_TIMING ("start-encoder-thread thread=%1 server=%2", thread_id (), server->host_name ());
-       } else {
-               LOG_TIMING ("start-encoder-thread thread=%1 server=localhost", thread_id ());
+
+       /* CPU */
+
+       auto const is_cpu_thread = [](shared_ptr<J2KEncoderThread> thread) {
+               return static_cast<bool>(dynamic_pointer_cast<CPUJ2KEncoderThread>(thread));
+       };
+
+       auto const current_cpu_threads = std::count_if(_threads.begin(), _threads.end(), is_cpu_thread);
+
+       for (auto i = current_cpu_threads; i < cpu; ++i) {
+               auto thread = make_shared<CPUJ2KEncoderThread>(*this);
+               thread->start();
+               _threads.push_back(thread);
        }
 
-       /* Number of seconds that we currently wait between attempts
-          to connect to the server; not relevant for localhost
-          encodings.
-       */
-       int remote_backoff = 0;
+       remove_threads(cpu, current_cpu_threads, is_cpu_thread);
+
 
-       while (true) {
+       /* GPU */
 
-               LOG_TIMING ("encoder-sleep thread=%1", thread_id ());
-               boost::mutex::scoped_lock lock (_queue_mutex);
-               while (_queue.empty ()) {
-                       _empty_condition.wait (lock);
+       auto const is_grok_thread = [](shared_ptr<J2KEncoderThread> thread) {
+               return static_cast<bool>(dynamic_pointer_cast<GrokJ2KEncoderThread>(thread));
+       };
+
+       auto const current_gpu_threads = std::count_if(_threads.begin(), _threads.end(), is_grok_thread);
+
+       for (auto i = current_gpu_threads; i < gpu; ++i) {
+               auto thread = make_shared<GrokJ2KEncoderThread>(*this, _context);
+               thread->start();
+               _threads.push_back(thread);
+       }
+
+       remove_threads(gpu, current_gpu_threads, is_grok_thread);
+
+
+       /* Remote */
+
+       for (auto const& server: servers) {
+               if (!server.current_link_version()) {
+                       continue;
                }
 
-               LOG_TIMING ("encoder-wake thread=%1 queue=%2", thread_id(), _queue.size());
-               auto vf = _queue.front ();
+               auto is_remote_thread = [server](shared_ptr<J2KEncoderThread> thread) {
+                       auto remote = dynamic_pointer_cast<RemoteJ2KEncoderThread>(thread);
+                       return remote && remote->server().host_name() == server.host_name();
+               };
 
-               /* We're about to commit to either encoding this frame or putting it back onto the queue,
-                  so we must not be interrupted until one or other of these things have happened.  This
-                  block has thread interruption disabled.
-               */
-               {
-                       boost::this_thread::disable_interruption dis;
-
-                       LOG_TIMING ("encoder-pop thread=%1 frame=%2 eyes=%3", thread_id(), vf.index(), static_cast<int>(vf.eyes()));
-                       _queue.pop_front ();
-
-                       lock.unlock ();
-
-                       shared_ptr<Data> encoded;
-
-                       /* We need to encode this input */
-                       if (server) {
-                               try {
-                                       encoded = make_shared<dcp::ArrayData>(vf.encode_remotely(server.get()));
-
-                                       if (remote_backoff > 0) {
-                                               LOG_GENERAL ("%1 was lost, but now she is found; removing backoff", server->host_name ());
-                                       }
-
-                                       /* This job succeeded, so remove any backoff */
-                                       remote_backoff = 0;
-
-                               } catch (std::exception& e) {
-                                       if (remote_backoff < 60) {
-                                               /* back off more */
-                                               remote_backoff += 10;
-                                       }
-                                       LOG_ERROR (
-                                               N_("Remote encode of %1 on %2 failed (%3); thread sleeping for %4s"),
-                                               vf.index(), server->host_name(), e.what(), remote_backoff
-                                               );
-                               }
-
-                       } else {
-                               if (_context) {
-                                       if (!_context->launch(vf, config->selected_gpu()) || !_context->scheduleCompress(vf)) {
-                                               LOG_GENERAL (N_("[%1] J2KEncoder thread pushes frame %2 back onto queue after failure"), thread_id(), vf.index());
-                                               _queue.push_front (vf);
-                                       }
-                               } else {
-                                       try {
-                                               LOG_TIMING ("start-local-encode thread=%1 frame=%2", thread_id(), vf.index());
-                                               encoded = make_shared<dcp::ArrayData>(vf.encode_locally());
-                                               LOG_TIMING ("finish-local-encode thread=%1 frame=%2", thread_id(), vf.index());
-                                       } catch (std::exception& e) {
-                                               /* This is very bad, so don't cope with it, just pass it on */
-                                               LOG_ERROR (N_("Local encode failed (%1)"), e.what ());
-                                               throw;
-                                       }
-                               }
-                       }
+               auto const current_threads = std::count_if(_threads.begin(), _threads.end(), is_remote_thread);
 
-                       if (encoded) {
-                               _writer.write(encoded, vf.index(), vf.eyes());
-                               frame_done ();
-                       } else {
-                               if (!Config::instance()->enable_gpu ()) {
-                                       lock.lock ();
-                                       LOG_GENERAL (N_("[%1] J2KEncoder thread pushes frame %2 back onto queue after failure"), thread_id(), vf.index());
-                                       _queue.push_front (vf);
-                                       lock.unlock ();
-                               }
-                       }
+               auto const wanted_threads = server.threads();
+
+               if (wanted_threads > current_threads) {
+                       LOG_GENERAL(N_("Adding %1 worker threads for remote %2"), wanted_threads - current_threads, server.host_name());
+               } else if (wanted_threads < current_threads) {
+                       LOG_GENERAL(N_("Removing %1 worker threads for remote %2"), current_threads - wanted_threads, server.host_name());
                }
 
-               if (remote_backoff > 0) {
-                       boost::this_thread::sleep (boost::posix_time::seconds (remote_backoff));
+               for (auto i = current_threads; i < wanted_threads; ++i) {
+                       auto thread = make_shared<RemoteJ2KEncoderThread>(*this, server);
+                       thread->start();
+                       _threads.push_back(thread);
                }
 
-               /* The queue might not be full any more, so notify anything that is waiting on that */
-               lock.lock ();
-               _full_condition.notify_all ();
+               remove_threads(wanted_threads, current_threads, is_remote_thread);
        }
+
+       _writer.set_encoder_threads(_threads.size());
 }
-catch (boost::thread_interrupted& e) {
-       /* Ignore these and just stop the thread */
-       _full_condition.notify_all ();
-}
-catch (...)
+
+
+DCPVideo
+J2KEncoder::pop()
 {
-       store_current ();
-       /* Wake anything waiting on _full_condition so it can see the exception */
-       _full_condition.notify_all ();
+       boost::mutex::scoped_lock lock(_queue_mutex);
+       while (_queue.empty()) {
+               _empty_condition.wait (lock);
+       }
+
+       LOG_TIMING("encoder-wake thread=%1 queue=%2", thread_id(), _queue.size());
+
+       auto vf = _queue.front();
+       _queue.pop_front();
+
+       _full_condition.notify_all();
+       return vf;
 }
 
 
 void
-J2KEncoder::servers_list_changed ()
+J2KEncoder::retry(DCPVideo video)
 {
-       boost::mutex::scoped_lock lm (_threads_mutex);
-
-       terminate_threads ();
-       _threads = make_shared<boost::thread_group>();
-
-       /* XXX: could re-use threads */
-
-       if (!Config::instance()->only_servers_encode ()) {
-               for (int i = 0; i < Config::instance()->master_encoding_threads (); ++i) {
-#ifdef DCPOMATIC_LINUX
-                       auto t = _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, optional<EncodeServerDescription>()));
-                       pthread_setname_np (t->native_handle(), "encode-worker");
-#else
-                       _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, optional<EncodeServerDescription>()));
-#endif
-               }
-       }
-
-       for (auto i: EncodeServerFinder::instance()->servers()) {
-               if (!i.current_link_version()) {
-                       continue;
-               }
+       boost::mutex::scoped_lock lock(_queue_mutex);
+       _queue.push_front(video);
+       _empty_condition.notify_all();
+}
 
-               LOG_GENERAL (N_("Adding %1 worker threads for remote %2"), i.threads(), i.host_name ());
-               for (int j = 0; j < i.threads(); ++j) {
-                       _threads->create_thread(boost::bind(&J2KEncoder::encoder_thread, this, i));
-               }
-       }
 
-       _writer.set_encoder_threads(_threads->size());
+void
+J2KEncoder::write(shared_ptr<const dcp::Data> data, int index, Eyes eyes)
+{
+       _writer.write(data, index, eyes);
+       frame_done();
 }