Merge branch 'master' of ssh://git.carlh.net/home/carl/git/dcpomatic
[dcpomatic.git] / src / lib / writer.cc
index 23f8bee97d487b5a018f4e0eed6f3922da3f407d..bace6602dfb6331fa74a643244757fc4f9caeb81 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
 
 */
 
-#include <fstream>
-#include <cerrno>
-#include <libdcp/mono_picture_asset.h>
-#include <libdcp/stereo_picture_asset.h>
-#include <libdcp/sound_asset.h>
-#include <libdcp/reel.h>
-#include <libdcp/dcp.h>
-#include <libdcp/cpl.h>
 #include "writer.h"
 #include "compose.hpp"
 #include "film.h"
 #include "ratio.h"
 #include "log.h"
-#include "dcp_video_frame.h"
+#include "dcp_video.h"
 #include "dcp_content_type.h"
-#include "player.h"
 #include "audio_mapping.h"
 #include "config.h"
 #include "job.h"
 #include "cross.h"
+#include "audio_buffers.h"
+#include "md5_digester.h"
+#include "data.h"
+#include "version.h"
+#include "font.h"
+#include "util.h"
+#include <dcp/mono_picture_asset.h>
+#include <dcp/stereo_picture_asset.h>
+#include <dcp/sound_asset.h>
+#include <dcp/sound_asset_writer.h>
+#include <dcp/reel.h>
+#include <dcp/reel_mono_picture_asset.h>
+#include <dcp/reel_stereo_picture_asset.h>
+#include <dcp/reel_sound_asset.h>
+#include <dcp/reel_subtitle_asset.h>
+#include <dcp/dcp.h>
+#include <dcp/cpl.h>
+#include <dcp/certificate_chain.h>
+#include <dcp/interop_subtitle_asset.h>
+#include <dcp/smpte_subtitle_asset.h>
+#include <boost/foreach.hpp>
+#include <fstream>
+#include <cerrno>
+#include <iostream>
 
 #include "i18n.h"
 
+#define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
+#define LOG_GENERAL_NC(...) _film->log()->log (__VA_ARGS__, Log::TYPE_GENERAL);
+#define LOG_DEBUG_ENCODE(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_DEBUG_ENCODE);
+#define LOG_TIMING(...) _film->log()->microsecond_log (String::compose (__VA_ARGS__), Log::TYPE_TIMING);
+#define LOG_WARNING_NC(...) _film->log()->log (__VA_ARGS__, Log::TYPE_WARNING);
+#define LOG_WARNING(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_WARNING);
+#define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
+
 /* OS X strikes again */
 #undef set_key
 
@@ -48,14 +71,14 @@ using std::pair;
 using std::string;
 using std::list;
 using std::cout;
-using std::stringstream;
 using boost::shared_ptr;
 using boost::weak_ptr;
+using boost::dynamic_pointer_cast;
 
-int const Writer::_maximum_frames_in_memory = Config::instance()->num_local_encoding_threads() + 4;
+int const Writer::_info_size = 48;
 
-Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
-       : _film (f)
+Writer::Writer (shared_ptr<const Film> film, weak_ptr<Job> j)
+       : _film (film)
        , _job (j)
        , _first_nonexistant_frame (0)
        , _thread (0)
@@ -63,6 +86,7 @@ Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
        , _queued_full_in_memory (0)
        , _last_written_frame (-1)
        , _last_written_eyes (EYES_RIGHT)
+       , _maximum_frames_in_memory (0)
        , _full_written (0)
        , _fake_written (0)
        , _repeat_written (0)
@@ -72,10 +96,7 @@ Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
        boost::filesystem::remove_all (_film->dir (_film->dcp_name ()));
 
        shared_ptr<Job> job = _job.lock ();
-       assert (job);
-
-       job->sub (_("Checking existing image data"));
-       check_existing_picture_mxf ();
+       DCPOMATIC_ASSERT (job);
 
        /* Create our picture asset in a subdirectory, named according to those
           film's parameters which affect the video output.  We will hard-link
@@ -83,52 +104,74 @@ Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
        */
 
        if (_film->three_d ()) {
-               _picture_asset.reset (new libdcp::StereoPictureAsset (_film->internal_video_mxf_dir (), _film->internal_video_mxf_filename ()));
+               _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
        } else {
-               _picture_asset.reset (new libdcp::MonoPictureAsset (_film->internal_video_mxf_dir (), _film->internal_video_mxf_filename ()));
+               _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
        }
 
-       _picture_asset->set_edit_rate (_film->video_frame_rate ());
        _picture_asset->set_size (_film->frame_size ());
-       _picture_asset->set_interop (_film->interop ());
 
        if (_film->encrypted ()) {
                _picture_asset->set_key (_film->key ());
        }
-       
-       _picture_asset_writer = _picture_asset->start_write (_first_nonexistant_frame > 0);
 
-       _sound_asset.reset (new libdcp::SoundAsset (_film->directory (), _film->audio_mxf_filename ()));
-       _sound_asset->set_edit_rate (_film->video_frame_rate ());
-       _sound_asset->set_channels (_film->audio_channels ());
-       _sound_asset->set_sampling_rate (_film->audio_frame_rate ());
-       _sound_asset->set_interop (_film->interop ());
+       _picture_asset->set_file (
+               _film->internal_video_asset_dir() / _film->internal_video_asset_filename()
+               );
 
-       if (_film->encrypted ()) {
-               _sound_asset->set_key (_film->key ());
+       job->sub (_("Checking existing image data"));
+       check_existing_picture_asset ();
+
+       _picture_asset_writer = _picture_asset->start_write (
+               _film->internal_video_asset_dir() / _film->internal_video_asset_filename(),
+               _film->interop() ? dcp::INTEROP : dcp::SMPTE,
+               _first_nonexistant_frame > 0
+               );
+
+       if (_film->audio_channels ()) {
+               _sound_asset.reset (
+                       new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels ())
+                       );
+
+               if (_film->encrypted ()) {
+                       _sound_asset->set_key (_film->key ());
+               }
+
+               /* Write the sound asset into the film directory so that we leave the creation
+                  of the DCP directory until the last minute.
+               */
+               _sound_asset_writer = _sound_asset->start_write (
+                       _film->directory() / audio_asset_filename (_sound_asset),
+                       _film->interop() ? dcp::INTEROP : dcp::SMPTE
+                       );
        }
-       
-       /* Write the sound asset into the film directory so that we leave the creation
-          of the DCP directory until the last minute.
-       */
-       _sound_asset_writer = _sound_asset->start_write ();
 
-       _thread = new boost::thread (boost::bind (&Writer::thread, this));
+       /* Check that the signer is OK if we need one */
+       if (_film->is_signed() && !Config::instance()->signer_chain()->valid ()) {
+               throw InvalidSignerError ();
+       }
 
        job->sub (_("Encoding image data"));
 }
 
+void
+Writer::start ()
+{
+       _thread = new boost::thread (boost::bind (&Writer::thread, this));
+}
+
 Writer::~Writer ()
 {
        terminate_thread (false);
 }
 
 void
-Writer::write (shared_ptr<const EncodedData> encoded, int frame, Eyes eyes)
+Writer::write (Data encoded, int frame, Eyes eyes)
 {
-       boost::mutex::scoped_lock lock (_mutex);
+       boost::mutex::scoped_lock lock (_state_mutex);
 
        while (_queued_full_in_memory > _maximum_frames_in_memory) {
+               /* The queue is too big; wait until that is sorted out */
                _full_condition.wait (lock);
        }
 
@@ -150,23 +193,55 @@ Writer::write (shared_ptr<const EncodedData> encoded, int frame, Eyes eyes)
                _queue.push_back (qi);
                ++_queued_full_in_memory;
        }
-       
+
+       /* Now there's something to do: wake anything wait()ing on _empty_condition */
+       _empty_condition.notify_all ();
+}
+
+void
+Writer::repeat (int frame, Eyes eyes)
+{
+       boost::mutex::scoped_lock lock (_state_mutex);
+
+       while (_queued_full_in_memory > _maximum_frames_in_memory) {
+               /* The queue is too big; wait until that is sorted out */
+               _full_condition.wait (lock);
+       }
+
+       QueueItem qi;
+       qi.type = QueueItem::REPEAT;
+       qi.frame = frame;
+       if (_film->three_d() && eyes == EYES_BOTH) {
+               qi.eyes = EYES_LEFT;
+               _queue.push_back (qi);
+               qi.eyes = EYES_RIGHT;
+               _queue.push_back (qi);
+       } else {
+               qi.eyes = eyes;
+               _queue.push_back (qi);
+       }
+
+       /* Now there's something to do: wake anything wait()ing on _empty_condition */
        _empty_condition.notify_all ();
 }
 
 void
 Writer::fake_write (int frame, Eyes eyes)
 {
-       boost::mutex::scoped_lock lock (_mutex);
+       boost::mutex::scoped_lock lock (_state_mutex);
 
        while (_queued_full_in_memory > _maximum_frames_in_memory) {
+               /* The queue is too big; wait until that is sorted out */
                _full_condition.wait (lock);
        }
-       
-       FILE* ifi = fopen_boost (_film->info_path (frame, eyes), "r");
-       libdcp::FrameInfo info (ifi);
-       fclose (ifi);
-       
+
+       FILE* file = fopen_boost (_film->info_file (), "rb");
+       if (!file) {
+               throw ReadFileError (_film->info_file ());
+       }
+       dcp::FrameInfo info = read_frame_info (file, frame, eyes);
+       fclose (file);
+
        QueueItem qi;
        qi.type = QueueItem::FAKE;
        qi.size = info.size;
@@ -181,6 +256,7 @@ Writer::fake_write (int frame, Eyes eyes)
                _queue.push_back (qi);
        }
 
+       /* Now there's something to do: wake anything wait()ing on _empty_condition */
        _empty_condition.notify_all ();
 }
 
@@ -188,7 +264,9 @@ Writer::fake_write (int frame, Eyes eyes)
 void
 Writer::write (shared_ptr<const AudioBuffers> audio)
 {
-       _sound_asset_writer->write (audio->data(), audio->frames());
+       if (_sound_asset_writer) {
+               _sound_asset_writer->write (audio->data(), audio->frames());
+       }
 }
 
 /** This must be called from Writer::thread() with an appropriate lock held */
@@ -221,29 +299,70 @@ Writer::have_sequenced_image_at_queue_head ()
        return false;
 }
 
+void
+Writer::write_frame_info (int frame, Eyes eyes, dcp::FrameInfo info) const
+{
+       FILE* file = 0;
+       if (boost::filesystem::exists (_film->info_file ())) {
+               file = fopen_boost (_film->info_file(), "r+b");
+       } else {
+               file = fopen_boost (_film->info_file(), "wb");
+       }
+       if (!file) {
+               throw OpenFileError (_film->info_file ());
+       }
+       dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
+       fwrite (&info.offset, sizeof (info.offset), 1, file);
+       fwrite (&info.size, sizeof (info.size), 1, file);
+       fwrite (info.hash.c_str(), 1, info.hash.size(), file);
+       fclose (file);
+}
+
 void
 Writer::thread ()
 try
 {
-       while (1)
+       while (true)
        {
-               boost::mutex::scoped_lock lock (_mutex);
+               boost::mutex::scoped_lock lock (_state_mutex);
+
+               while (true) {
 
-               while (1) {
-                       
                        if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
+                               /* We've got something to do: go and do it */
                                break;
                        }
 
-                       TIMING (N_("writer sleeps with a queue of %1"), _queue.size());
+                       /* Nothing to do: wait until something happens which may indicate that we do */
+                       LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
                        _empty_condition.wait (lock);
-                       TIMING (N_("writer wakes with a queue of %1"), _queue.size());
+                       LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
                }
 
                if (_finish && _queue.empty()) {
                        return;
                }
 
+               /* We stop here if we have been asked to finish, and if either the queue
+                  is empty or we do not have a sequenced image at its head (if this is the
+                  case we will never terminate as no new frames will be sent once
+                  _finish is true).
+               */
+               if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
+                       /* (Hopefully temporarily) log anything that was not written */
+                       if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
+                               LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
+                               for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
+                                       if (i->type == QueueItem::FULL) {
+                                               LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, i->eyes);
+                                       } else {
+                                               LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, i->eyes);
+                                       }
+                               }
+                               LOG_WARNING (N_("Last written frame %1, last written eyes %2"), _last_written_frame, _last_written_eyes);
+                       }
+                       return;
+               }
                /* Write any frames that we can write; i.e. those that are in sequence. */
                while (have_sequenced_image_at_queue_head ()) {
                        QueueItem qi = _queue.front ();
@@ -256,51 +375,48 @@ try
                        switch (qi.type) {
                        case QueueItem::FULL:
                        {
-                               _film->log()->log (String::compose (N_("Writer FULL-writes %1 to MXF"), qi.frame));
+                               LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, qi.eyes);
                                if (!qi.encoded) {
-                                       qi.encoded.reset (new EncodedData (_film->j2c_path (qi.frame, qi.eyes, false)));
+                                       qi.encoded = Data (_film->j2c_path (qi.frame, qi.eyes, false));
                                }
 
-                               libdcp::FrameInfo fin = _picture_asset_writer->write (qi.encoded->data(), qi.encoded->size());
-                               qi.encoded->write_info (_film, qi.frame, qi.eyes, fin);
+                               dcp::FrameInfo fin = _picture_asset_writer->write (qi.encoded->data().get (), qi.encoded->size());
+                               write_frame_info (qi.frame, qi.eyes, fin);
                                _last_written[qi.eyes] = qi.encoded;
                                ++_full_written;
                                break;
                        }
                        case QueueItem::FAKE:
-                               _film->log()->log (String::compose (N_("Writer FAKE-writes %1 to MXF"), qi.frame));
+                               LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
                                _picture_asset_writer->fake_write (qi.size);
                                _last_written[qi.eyes].reset ();
                                ++_fake_written;
                                break;
                        case QueueItem::REPEAT:
-                       {
-                               _film->log()->log (String::compose (N_("Writer REPEAT-writes %1 to MXF"), qi.frame));
-                               libdcp::FrameInfo fin = _picture_asset_writer->write (
-                                       _last_written[qi.eyes]->data(),
+                               LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
+                               dcp::FrameInfo fin = _picture_asset_writer->write (
+                                       _last_written[qi.eyes]->data().get(),
                                        _last_written[qi.eyes]->size()
                                        );
-                               
-                               _last_written[qi.eyes]->write_info (_film, qi.frame, qi.eyes, fin);
+                               write_frame_info (qi.frame, qi.eyes, fin);
                                ++_repeat_written;
                                break;
                        }
-                       }
                        lock.lock ();
 
                        _last_written_frame = qi.frame;
                        _last_written_eyes = qi.eyes;
-                       
-                       if (_film->length()) {
-                               shared_ptr<Job> job = _job.lock ();
-                               assert (job);
-                               int total = _film->time_to_video_frames (_film->length ());
-                               if (_film->three_d ()) {
-                                       /* _full_written and so on are incremented for each eye, so we need to double the total
-                                          frames to get the correct progress.
-                                       */
-                                       total *= 2;
-                               }
+
+                       shared_ptr<Job> job = _job.lock ();
+                       DCPOMATIC_ASSERT (job);
+                       int64_t total = _film->length().frames_round (_film->video_frame_rate ());
+                       if (_film->three_d ()) {
+                               /* _full_written and so on are incremented for each eye, so we need to double the total
+                                  frames to get the correct progress.
+                               */
+                               total *= 2;
+                       }
+                       if (total) {
                                job->set_progress (float (_full_written + _fake_written + _repeat_written) / total);
                        }
                }
@@ -317,26 +433,29 @@ try
                                ++i;
                        }
 
-                       assert (i != _queue.rend());
-                       QueueItem qi = *i;
-
+                       DCPOMATIC_ASSERT (i != _queue.rend());
                        ++_pushed_to_disk;
-                       
                        lock.unlock ();
 
-                       _film->log()->log (
-                               String::compose (
-                                       "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
-                                       _last_written_frame + 1,
-                                       _last_written_eyes, qi.frame)
+                       /* i is valid here, even though we don't hold a lock on the mutex,
+                          since list iterators are unaffected by insertion and only this
+                          thread could erase the last item in the list.
+                       */
+
+                       LOG_GENERAL (
+                               "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
+                               _last_written_frame + 1,
+                               _last_written_eyes, i->frame
                                );
-                       
-                       qi.encoded->write (_film, qi.frame, qi.eyes);
+
+                       i->encoded->write_via_temp (_film->j2c_path (i->frame, i->eyes, true), _film->j2c_path (i->frame, i->eyes, false));
+
                        lock.lock ();
-                       qi.encoded.reset ();
+                       i->encoded.reset ();
                        --_queued_full_in_memory;
                }
 
+               /* The queue has probably just gone down a bit; notify anything wait()ing on _full_condition */
                _full_condition.notify_all ();
        }
 }
@@ -348,24 +467,25 @@ catch (...)
 void
 Writer::terminate_thread (bool can_throw)
 {
-       boost::mutex::scoped_lock lock (_mutex);
+       boost::mutex::scoped_lock lock (_state_mutex);
        if (_thread == 0) {
                return;
        }
-       
+
        _finish = true;
        _empty_condition.notify_all ();
        _full_condition.notify_all ();
        lock.unlock ();
 
+       DCPOMATIC_ASSERT (_thread->joinable ());
        _thread->join ();
        if (can_throw) {
                rethrow ();
        }
-       
+
        delete _thread;
        _thread = 0;
-}      
+}
 
 void
 Writer::finish ()
@@ -373,199 +493,264 @@ Writer::finish ()
        if (!_thread) {
                return;
        }
-       
+
        terminate_thread (true);
 
-       _picture_asset_writer->finalize ();
-       _sound_asset_writer->finalize ();
-       
-       int const frames = _last_written_frame + 1;
-
-       _picture_asset->set_duration (frames);
-
-       /* Hard-link the video MXF into the DCP */
-       boost::filesystem::path video_from;
-       video_from /= _film->internal_video_mxf_dir();
-       video_from /= _film->internal_video_mxf_filename();
-       
-       boost::filesystem::path video_to;
-       video_to /= _film->dir (_film->dcp_name());
-       video_to /= _film->video_mxf_filename ();
-
-       boost::system::error_code ec;
-       boost::filesystem::create_hard_link (video_from, video_to, ec);
-       if (ec) {
-               /* hard link failed; copy instead */
-               boost::filesystem::copy_file (video_from, video_to);
-               _film->log()->log ("Hard-link failed; fell back to copying");
-       }
-
-       /* And update the asset */
-
-       _picture_asset->set_directory (_film->dir (_film->dcp_name ()));
-       _picture_asset->set_file_name (_film->video_mxf_filename ());
-
-       /* Move the audio MXF into the DCP */
-
-       boost::filesystem::path audio_to;
-       audio_to /= _film->dir (_film->dcp_name ());
-       audio_to /= _film->audio_mxf_filename ();
-       
-       boost::filesystem::rename (_film->file (_film->audio_mxf_filename ()), audio_to, ec);
-       if (ec) {
-               throw FileError (
-                       String::compose (_("could not move audio MXF into the DCP (%1)"), ec.value ()), _film->file (_film->audio_mxf_filename ())
-                       );
+       if (!_picture_asset_writer->finalize ()) {
+               /* Nothing was written to the picture asset */
+               _picture_asset.reset ();
        }
 
-       _sound_asset->set_directory (_film->dir (_film->dcp_name ()));
-       _sound_asset->set_duration (frames);
-       
-       libdcp::DCP dcp (_film->dir (_film->dcp_name()));
+       if (_sound_asset_writer) {
+               if (!_sound_asset_writer->finalize ()) {
+                       /* Nothing was written to the sound asset */
+                       _sound_asset.reset ();
+               }
+       }
 
-       shared_ptr<libdcp::CPL> cpl (
-               new libdcp::CPL (
-                       _film->dir (_film->dcp_name()),
+       /* Hard-link any video asset file into the DCP */
+       if (_picture_asset) {
+               boost::filesystem::path video_from = _picture_asset->file ();
+               boost::filesystem::path video_to;
+               video_to /= _film->dir (_film->dcp_name());
+               video_to /= video_asset_filename (_picture_asset);
+
+               boost::system::error_code ec;
+               boost::filesystem::create_hard_link (video_from, video_to, ec);
+               if (ec) {
+                       LOG_WARNING_NC ("Hard-link failed; copying instead");
+                       boost::filesystem::copy_file (video_from, video_to, ec);
+                       if (ec) {
+                               LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
+                               throw FileError (ec.message(), video_from);
+                       }
+               }
+
+               _picture_asset->set_file (video_to);
+       }
+
+       /* Move the audio asset into the DCP */
+       if (_sound_asset) {
+               boost::filesystem::path audio_to;
+               audio_to /= _film->dir (_film->dcp_name ());
+               audio_to /= audio_asset_filename (_sound_asset);
+
+               boost::system::error_code ec;
+               boost::filesystem::rename (_film->file (audio_asset_filename (_sound_asset)), audio_to, ec);
+               if (ec) {
+                       throw FileError (
+                               String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), audio_asset_filename (_sound_asset)
+                               );
+               }
+
+               _sound_asset->set_file (audio_to);
+       }
+
+       dcp::DCP dcp (_film->dir (_film->dcp_name()));
+
+       shared_ptr<dcp::CPL> cpl (
+               new dcp::CPL (
                        _film->dcp_name(),
-                       _film->dcp_content_type()->libdcp_kind (),
-                       frames,
-                       _film->video_frame_rate ()
+                       _film->dcp_content_type()->libdcp_kind ()
                        )
                );
-       
-       dcp.add_cpl (cpl);
-
-       cpl->add_reel (shared_ptr<libdcp::Reel> (new libdcp::Reel (
-                                                        _picture_asset,
-                                                        _sound_asset,
-                                                        shared_ptr<libdcp::SubtitleAsset> ()
-                                                        )
-                              ));
 
-       shared_ptr<Job> job = _job.lock ();
-       assert (job);
+       dcp.add (cpl);
 
-       job->sub (_("Computing image digest"));
-       _picture_asset->compute_digest (boost::bind (&Job::set_progress, job.get(), _1, false));
+       shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 
-       job->sub (_("Computing audio digest"));
-       _sound_asset->compute_digest (boost::bind (&Job::set_progress, job.get(), _1, false));
+       shared_ptr<dcp::ReelPictureAsset> reel_picture_asset;
 
-       libdcp::XMLMetadata meta = Config::instance()->dcp_metadata ();
-       meta.set_issue_date_now ();
-       dcp.write_xml (_film->interop (), meta, _film->is_signed() ? make_signer () : shared_ptr<const libdcp::Signer> ());
+       if (_picture_asset) {
+               /* We have made a picture asset of our own.  Put it into the reel */
+               shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
+               if (mono) {
+                       reel_picture_asset.reset (new dcp::ReelMonoPictureAsset (mono, 0));
+               }
 
-       _film->log()->log (
-               String::compose (N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT; %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk)
-               );
-}
+               shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
+               if (stereo && boost::filesystem::exists (stereo->file ())) {
+                       reel_picture_asset.reset (new dcp::ReelStereoPictureAsset (stereo, 0));
+               }
+       } else {
+               /* We don't have a picture asset of our own; maybe we need to reference one */
+               /* XXX: this is all a hack */
+               BOOST_FOREACH (shared_ptr<dcp::ReelAsset> i, _reel_assets) {
+                       shared_ptr<dcp::ReelPictureAsset> j = dynamic_pointer_cast<dcp::ReelPictureAsset> (i);
+                       if (j) {
+                               reel_picture_asset = j;
+                       }
+               }
+       }
 
-/** Tell the writer that frame `f' should be a repeat of the frame before it */
-void
-Writer::repeat (int f, Eyes e)
-{
-       boost::mutex::scoped_lock lock (_mutex);
+       reel->add (reel_picture_asset);
 
-       while (_queued_full_in_memory > _maximum_frames_in_memory) {
-               _full_condition.wait (lock);
+       if (_sound_asset) {
+               /* We have made a sound asset of our own.  Put it into the reel */
+               reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_asset, 0)));
+       } else {
+               /* We don't have a sound asset of our own; maybe we need to reference one */
+               /* XXX: this is all a hack */
+               BOOST_FOREACH (shared_ptr<dcp::ReelAsset> i, _reel_assets) {
+                       if (dynamic_pointer_cast<dcp::ReelSoundAsset> (i)) {
+                               reel->add (i);
+                       }
+               }
        }
-       
-       QueueItem qi;
-       qi.type = QueueItem::REPEAT;
-       qi.frame = f;
-       if (_film->three_d() && e == EYES_BOTH) {
-               qi.eyes = EYES_LEFT;
-               _queue.push_back (qi);
-               qi.eyes = EYES_RIGHT;
-               _queue.push_back (qi);
+
+       if (_subtitle_asset) {
+               boost::filesystem::path liberation;
+               try {
+                       liberation = shared_path () / "LiberationSans-Regular.ttf";
+               } catch (boost::filesystem::filesystem_error& e) {
+                       /* Hack: try the debian/ubuntu location if getting the shared path failed */
+                       liberation = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
+               }
+
+               /* Add all the fonts to the subtitle content */
+               BOOST_FOREACH (shared_ptr<Font> i, _fonts) {
+                       _subtitle_asset->add_font (i->id(), i->file().get_value_or (liberation));
+               }
+
+               if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (_subtitle_asset)) {
+                       boost::filesystem::path directory = _film->dir (_film->dcp_name ()) / _subtitle_asset->id ();
+                       boost::filesystem::create_directories (directory);
+                       _subtitle_asset->write (directory / ("sub_" + _subtitle_asset->id() + ".xml"));
+               } else {
+                       _subtitle_asset->write (
+                               _film->dir (_film->dcp_name ()) / ("sub_" + _subtitle_asset->id() + ".mxf")
+                               );
+               }
+
+               reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
+                                  new dcp::ReelSubtitleAsset (
+                                          _subtitle_asset,
+                                          dcp::Fraction (_film->video_frame_rate(), 1),
+                                          reel_picture_asset->intrinsic_duration (),
+                                          0
+                                          )
+                                  ));
        } else {
-               qi.eyes = e;
-               _queue.push_back (qi);
+               /* We don't have a subtitle asset of our own; maybe we need to reference one */
+               /* XXX: this is all a hack */
+               BOOST_FOREACH (shared_ptr<dcp::ReelAsset> i, _reel_assets) {
+                       if (dynamic_pointer_cast<dcp::ReelSubtitleAsset> (i)) {
+                               reel->add (i);
+                       }
+               }
        }
 
-       _empty_condition.notify_all ();
-}
+       cpl->add (reel);
 
-bool
-Writer::check_existing_picture_mxf_frame (FILE* mxf, int f, Eyes eyes)
-{
-       /* Read the frame info as written */
-       FILE* ifi = fopen_boost (_film->info_path (f, eyes), "r");
-       if (!ifi) {
-               _film->log()->log (String::compose ("Existing frame %1 has no info file", f));
-               return false;
+       shared_ptr<Job> job = _job.lock ();
+       DCPOMATIC_ASSERT (job);
+
+       job->sub (_("Computing image digest"));
+       if (_picture_asset) {
+               _picture_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
        }
-       
-       libdcp::FrameInfo info (ifi);
-       fclose (ifi);
-       if (info.size == 0) {
-               _film->log()->log (String::compose ("Existing frame %1 has no info file", f));
-               return false;
+
+       if (_sound_asset) {
+               job->sub (_("Computing audio digest"));
+               _sound_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
        }
-       
-       /* Read the data from the MXF and hash it */
-       dcpomatic_fseek (mxf, info.offset, SEEK_SET);
-       EncodedData data (info.size);
-       size_t const read = fread (data.data(), 1, data.size(), mxf);
-       if (read != static_cast<size_t> (data.size ())) {
-               _film->log()->log (String::compose ("Existing frame %1 is incomplete", f));
-               return false;
+
+       dcp::XMLMetadata meta;
+       meta.creator = Config::instance()->dcp_creator ();
+       if (meta.creator.empty ()) {
+               meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
        }
-       
-       string const existing_hash = md5_digest (data.data(), data.size());
-       if (existing_hash != info.hash) {
-               _film->log()->log (String::compose ("Existing frame %1 failed hash check", f));
-               return false;
+       meta.issuer = Config::instance()->dcp_issuer ();
+       if (meta.issuer.empty ()) {
+               meta.issuer = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
+       }
+       meta.set_issue_date_now ();
+
+       cpl->set_metadata (meta);
+
+       shared_ptr<const dcp::CertificateChain> signer;
+       if (_film->is_signed ()) {
+               signer = Config::instance()->signer_chain ();
+               /* We did check earlier, but check again here to be on the safe side */
+               if (!signer->valid ()) {
+                       throw InvalidSignerError ();
+               }
        }
 
-       return true;
+       dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer);
+
+       LOG_GENERAL (
+               N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
+               );
 }
 
 void
-Writer::check_existing_picture_mxf ()
+Writer::check_existing_picture_asset ()
 {
-       /* Try to open the existing MXF */
-       boost::filesystem::path p;
-       p /= _film->internal_video_mxf_dir ();
-       p /= _film->internal_video_mxf_filename ();
-       FILE* mxf = fopen_boost (p, "rb");
-       if (!mxf) {
-               _film->log()->log (String::compose ("Could not open existing MXF at %1 (errno=%2)", p.string(), errno));
+       /* Try to open the existing asset */
+       FILE* asset_file = fopen_boost (_picture_asset->file(), "rb");
+       if (!asset_file) {
+               LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", _picture_asset->file().string(), errno);
                return;
        }
 
-       int N = 0;
-       for (boost::filesystem::directory_iterator i (_film->info_dir ()); i != boost::filesystem::directory_iterator (); ++i) {
-               ++N;
+       /* Offset of the last dcp::FrameInfo in the info file */
+       int const n = (boost::filesystem::file_size (_film->info_file ()) / _info_size) - 1;
+
+       FILE* info_file = fopen_boost (_film->info_file (), "rb");
+       if (!info_file) {
+               LOG_GENERAL_NC ("Could not open film info file");
+               fclose (asset_file);
+               return;
        }
 
-       while (1) {
+       if (_film->three_d ()) {
+               /* Start looking at the last left frame */
+               _first_nonexistant_frame = n / 2;
+       } else {
+               _first_nonexistant_frame = n;
+       }
 
-               shared_ptr<Job> job = _job.lock ();
-               assert (job);
+       bool ok = false;
 
-               if (N > 0) {
-                       job->set_progress (float (_first_nonexistant_frame) / N);
-               }
+       while (!ok) {
+               /* Read the data from the info file; for 3D we just check the left
+                  frames until we find a good one.
+               */
+               dcp::FrameInfo info = read_frame_info (info_file, _first_nonexistant_frame, _film->three_d () ? EYES_LEFT : EYES_BOTH);
 
-               if (_film->three_d ()) {
-                       if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_LEFT)) {
-                               break;
-                       }
-                       if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_RIGHT)) {
-                               break;
-                       }
+               ok = true;
+
+               /* Read the data from the asset and hash it */
+               dcpomatic_fseek (asset_file, info.offset, SEEK_SET);
+               Data data (info.size);
+               size_t const read = fread (data.data().get(), 1, data.size(), asset_file);
+               if (read != static_cast<size_t> (data.size ())) {
+                       LOG_GENERAL ("Existing frame %1 is incomplete", _first_nonexistant_frame);
+                       ok = false;
                } else {
-                       if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_BOTH)) {
-                               break;
+                       MD5Digester digester;
+                       digester.add (data.data().get(), data.size());
+                       if (digester.get() != info.hash) {
+                               LOG_GENERAL ("Existing frame %1 failed hash check", _first_nonexistant_frame);
+                               ok = false;
                        }
                }
 
-               _film->log()->log (String::compose ("Have existing frame %1", _first_nonexistant_frame));
+               if (!ok) {
+                       --_first_nonexistant_frame;
+               }
+       }
+
+       if (!_film->three_d ()) {
+               /* If we are doing 3D we might have found a good L frame with no R, so only
+                  do this if we're in 2D and we've just found a good B(oth) frame.
+               */
                ++_first_nonexistant_frame;
        }
 
-       fclose (mxf);
+       fclose (asset_file);
+       fclose (info_file);
 }
 
 /** @param frame Frame index.
@@ -575,11 +760,53 @@ bool
 Writer::can_fake_write (int frame) const
 {
        /* We have to do a proper write of the first frame so that we can set up the JPEG2000
-          parameters in the MXF writer.
+          parameters in the asset writer.
        */
        return (frame != 0 && frame < _first_nonexistant_frame);
 }
 
+void
+Writer::write (PlayerSubtitles subs)
+{
+       if (subs.text.empty ()) {
+               return;
+       }
+
+       if (!_subtitle_asset) {
+               string lang = _film->subtitle_language ();
+               if (lang.empty ()) {
+                       lang = "Unknown";
+               }
+               if (_film->interop ()) {
+                       shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
+                       s->set_movie_title (_film->name ());
+                       s->set_language (lang);
+                       s->set_reel_number ("1");
+                       _subtitle_asset = s;
+               } else {
+                       shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
+                       s->set_content_title_text (_film->name ());
+                       s->set_language (lang);
+                       s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
+                       s->set_reel_number (1);
+                       s->set_time_code_rate (_film->video_frame_rate ());
+                       s->set_start_time (dcp::Time ());
+                       _subtitle_asset = s;
+               }
+       }
+
+       for (list<dcp::SubtitleString>::const_iterator i = subs.text.begin(); i != subs.text.end(); ++i) {
+               _subtitle_asset->add (*i);
+       }
+}
+
+void
+Writer::write (list<shared_ptr<Font> > fonts)
+{
+       /* Just keep a list of fonts and we'll deal with them in ::finish */
+       copy (fonts.begin (), fonts.end (), back_inserter (_fonts));
+}
+
 bool
 operator< (QueueItem const & a, QueueItem const & b)
 {
@@ -595,3 +822,48 @@ operator== (QueueItem const & a, QueueItem const & b)
 {
        return a.frame == b.frame && a.eyes == b.eyes;
 }
+
+void
+Writer::set_encoder_threads (int threads)
+{
+       _maximum_frames_in_memory = lrint (threads * 1.1);
+}
+
+long
+Writer::frame_info_position (int frame, Eyes eyes) const
+{
+       switch (eyes) {
+       case EYES_BOTH:
+               return frame * _info_size;
+       case EYES_LEFT:
+               return frame * _info_size * 2;
+       case EYES_RIGHT:
+               return frame * _info_size * 2 + _info_size;
+       default:
+               DCPOMATIC_ASSERT (false);
+       }
+
+       DCPOMATIC_ASSERT (false);
+}
+
+dcp::FrameInfo
+Writer::read_frame_info (FILE* file, int frame, Eyes eyes) const
+{
+       dcp::FrameInfo info;
+       dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
+       fread (&info.offset, sizeof (info.offset), 1, file);
+       fread (&info.size, sizeof (info.size), 1, file);
+
+       char hash_buffer[33];
+       fread (hash_buffer, 1, 32, file);
+       hash_buffer[32] = '\0';
+       info.hash = hash_buffer;
+
+       return info;
+}
+
+void
+Writer::write (shared_ptr<dcp::ReelAsset> asset)
+{
+       _reel_assets.push_back (asset);
+}