X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fencoder.cc;h=0a29989b175045fcc6eaeab46266ee55fb358ad7;hb=36ce958a516567d8481163692c028a88c6ce0df7;hp=07139968dbdce85b02ca315518436f43f754ab46;hpb=51b4acfbaf0e2cd8b87bb675e023d9e940febc89;p=dcpomatic.git diff --git a/src/lib/encoder.cc b/src/lib/encoder.cc index 07139968d..0a29989b1 100644 --- a/src/lib/encoder.cc +++ b/src/lib/encoder.cc @@ -1,445 +1,47 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2017 Carl Hetherington - This program is free software; you can redistribute it and/or modify + This file is part of DCP-o-matic. + + DCP-o-matic is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + DCP-o-matic is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with DCP-o-matic. If not, see . */ -/** @file src/encoder.h - * @brief Parent class for classes which can encode video and audio frames. +/** @file src/encoder.cc + * @brief A class which takes a Film and some Options, then uses those to encode the film + * into some output format. + * + * A decoder is selected according to the content type, and the encoder can be specified + * as a parameter to the constructor. */ -#include -#include -#include -#include #include "encoder.h" -#include "util.h" -#include "options.h" -#include "film.h" -#include "log.h" -#include "exceptions.h" -#include "filter.h" -#include "config.h" -#include "dcp_video_frame.h" -#include "server.h" -#include "format.h" -#include "cross.h" -#include "writer.h" - -using std::pair; -using std::string; -using std::stringstream; -using std::vector; -using std::list; -using std::cout; -using std::make_pair; -using namespace boost; - -int const Encoder::_history_size = 25; - -/** @param f Film that we are encoding */ -Encoder::Encoder (shared_ptr f) - : _film (f) - , _video_frames_in (0) - , _video_frames_out (0) -#ifdef HAVE_SWRESAMPLE - , _swr_context (0) -#endif - , _have_a_real_frame (false) - , _terminate (false) -{ - -} - -Encoder::~Encoder () -{ - terminate_threads (); - if (_writer) { - _writer->finish (); - } -} - -void -Encoder::process_begin () -{ - if (_film->audio_stream() && _film->audio_stream()->sample_rate() != _film->target_audio_sample_rate()) { -#ifdef HAVE_SWRESAMPLE - - stringstream s; - s << "Will resample audio from " << _film->audio_stream()->sample_rate() << " to " << _film->target_audio_sample_rate(); - _film->log()->log (s.str ()); - - /* We will be using planar float data when we call the resampler */ - _swr_context = swr_alloc_set_opts ( - 0, - _film->audio_stream()->channel_layout(), - AV_SAMPLE_FMT_FLTP, - _film->target_audio_sample_rate(), - _film->audio_stream()->channel_layout(), - AV_SAMPLE_FMT_FLTP, - _film->audio_stream()->sample_rate(), - 0, 0 - ); - - swr_init (_swr_context); -#else - throw EncodeError ("Cannot resample audio as libswresample is not present"); -#endif - } else { -#ifdef HAVE_SWRESAMPLE - _swr_context = 0; -#endif - } - - for (int i = 0; i < Config::instance()->num_local_encoding_threads (); ++i) { - _threads.push_back (new boost::thread (boost::bind (&Encoder::encoder_thread, this, (ServerDescription *) 0))); - } - - vector servers = Config::instance()->servers (); - - for (vector::iterator i = servers.begin(); i != servers.end(); ++i) { - for (int j = 0; j < (*i)->threads (); ++j) { - _threads.push_back (new boost::thread (boost::bind (&Encoder::encoder_thread, this, *i))); - } - } - - _writer.reset (new Writer (_film)); -} - - -void -Encoder::process_end () -{ -#if HAVE_SWRESAMPLE - if (_film->audio_stream() && _film->audio_stream()->channels() && _swr_context) { +#include "player.h" - shared_ptr out (new AudioBuffers (_film->audio_stream()->channels(), 256)); - - while (1) { - int const frames = swr_convert (_swr_context, (uint8_t **) out->data(), 256, 0, 0); +#include "i18n.h" - if (frames < 0) { - throw EncodeError ("could not run sample-rate converter"); - } - - if (frames == 0) { - break; - } - - out->set_frames (frames); - write_audio (out); - } - - swr_free (&_swr_context); - } -#endif - - boost::mutex::scoped_lock lock (_mutex); - - _film->log()->log ("Clearing queue of " + lexical_cast (_queue.size ())); - - /* Keep waking workers until the queue is empty */ - while (!_queue.empty ()) { - _film->log()->log ("Waking with " + lexical_cast (_queue.size ()), Log::VERBOSE); - _condition.notify_all (); - _condition.wait (lock); - } - - lock.unlock (); - - terminate_threads (); - - _film->log()->log ("Mopping up " + lexical_cast (_queue.size())); - - /* The following sequence of events can occur in the above code: - 1. a remote worker takes the last image off the queue - 2. the loop above terminates - 3. the remote worker fails to encode the image and puts it back on the queue - 4. the remote worker is then terminated by terminate_threads - - So just mop up anything left in the queue here. - */ - - for (list >::iterator i = _queue.begin(); i != _queue.end(); ++i) { - _film->log()->log (String::compose ("Encode left-over frame %1", (*i)->frame ())); - try { - _writer->write ((*i)->encode_locally(), (*i)->frame ()); - frame_done (); - } catch (std::exception& e) { - _film->log()->log (String::compose ("Local encode failed (%1)", e.what ())); - } - } - - _writer->finish (); - _writer.reset (); -} - -/** @return an estimate of the current number of frames we are encoding per second, - * or 0 if not known. - */ -float -Encoder::current_frames_per_second () const -{ - boost::mutex::scoped_lock lock (_history_mutex); - if (int (_time_history.size()) < _history_size) { - return 0; - } - - struct timeval now; - gettimeofday (&now, 0); - - return _history_size / (seconds (now) - seconds (_time_history.back ())); -} - -/** @return Number of video frames that have been sent out */ -int -Encoder::video_frames_out () const -{ - boost::mutex::scoped_lock (_history_mutex); - return _video_frames_out; -} +using boost::weak_ptr; +using boost::shared_ptr; -/** Should be called when a frame has been encoded successfully. - * @param n Source frame index. +/** Construct an encoder. + * @param film Film that we are encoding. + * @param job Job that this encoder is being used in. */ -void -Encoder::frame_done () -{ - boost::mutex::scoped_lock lock (_history_mutex); - - struct timeval tv; - gettimeofday (&tv, 0); - _time_history.push_front (tv); - if (int (_time_history.size()) > _history_size) { - _time_history.pop_back (); - } -} - -void -Encoder::process_video (shared_ptr image, bool same, boost::shared_ptr sub) +Encoder::Encoder (shared_ptr film, weak_ptr job) + : _film (film) + , _job (job) + , _player (new Player(film)) { - DCPFrameRate dfr (_film->frames_per_second ()); - - if (dfr.skip && (_video_frames_in % 2)) { - ++_video_frames_in; - return; - } - - boost::mutex::scoped_lock lock (_mutex); - - /* Wait until the queue has gone down a bit */ - while (_queue.size() >= _threads.size() * 2 && !_terminate) { - TIMING ("decoder sleeps with queue of %1", _queue.size()); - _condition.wait (lock); - TIMING ("decoder wakes with queue of %1", _queue.size()); - } - - if (_terminate) { - return; - } - - if (_writer->thrown ()) { - _writer->rethrow (); - } - - if (_writer->can_fake_write (_video_frames_out)) { - _writer->fake_write (_video_frames_out); - _have_a_real_frame = false; - frame_done (); - } else if (same && _have_a_real_frame) { - /* Use the last frame that we encoded. */ - _writer->repeat (_video_frames_out); - frame_done (); - } else { - /* Queue this new frame for encoding */ - pair const s = Filter::ffmpeg_strings (_film->filters()); - TIMING ("adding to queue of %1", _queue.size ()); - _queue.push_back (boost::shared_ptr ( - new DCPVideoFrame ( - image, sub, _film->format()->dcp_size(), _film->format()->dcp_padding (_film), - _film->subtitle_offset(), _film->subtitle_scale(), - _film->scaler(), _video_frames_out, _film->frames_per_second(), s.second, - _film->colour_lut(), _film->j2k_bandwidth(), - _film->log() - ) - )); - - _condition.notify_all (); - _have_a_real_frame = true; - } - - ++_video_frames_in; - ++_video_frames_out; - - if (dfr.repeat) { - _writer->repeat (_video_frames_out); - ++_video_frames_out; - frame_done (); - } -} - -void -Encoder::process_audio (shared_ptr data) -{ -#if HAVE_SWRESAMPLE - /* Maybe sample-rate convert */ - if (_swr_context) { - - /* Compute the resampled frames count and add 32 for luck */ - int const max_resampled_frames = ceil ((int64_t) data->frames() * _film->target_audio_sample_rate() / _film->audio_stream()->sample_rate()) + 32; - - shared_ptr resampled (new AudioBuffers (_film->audio_stream()->channels(), max_resampled_frames)); - - /* Resample audio */ - int const resampled_frames = swr_convert ( - _swr_context, (uint8_t **) resampled->data(), max_resampled_frames, (uint8_t const **) data->data(), data->frames() - ); - - if (resampled_frames < 0) { - throw EncodeError ("could not run sample-rate converter"); - } - - resampled->set_frames (resampled_frames); - - /* And point our variables at the resampled audio */ - data = resampled; - } -#endif - - write_audio (data); -} - -void -Encoder::terminate_threads () -{ - boost::mutex::scoped_lock lock (_mutex); - _terminate = true; - _condition.notify_all (); - lock.unlock (); - - for (list::iterator i = _threads.begin(); i != _threads.end(); ++i) { - (*i)->join (); - delete *i; - } -} - -void -Encoder::encoder_thread (ServerDescription* server) -{ - /* Number of seconds that we currently wait between attempts - to connect to the server; not relevant for localhost - encodings. - */ - int remote_backoff = 0; - - while (1) { - - TIMING ("encoder thread %1 sleeps", boost::this_thread::get_id()); - boost::mutex::scoped_lock lock (_mutex); - while (_queue.empty () && !_terminate) { - _condition.wait (lock); - } - - if (_terminate) { - return; - } - - TIMING ("encoder thread %1 wakes with queue of %2", boost::this_thread::get_id(), _queue.size()); - boost::shared_ptr vf = _queue.front (); - _film->log()->log (String::compose ("Encoder thread %1 pops frame %2 from queue", boost::this_thread::get_id(), vf->frame()), Log::VERBOSE); - _queue.pop_front (); - - lock.unlock (); - - shared_ptr encoded; - - if (server) { - try { - encoded = vf->encode_remotely (server); - - if (remote_backoff > 0) { - _film->log()->log (String::compose ("%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; - } - _film->log()->log ( - String::compose ( - "Remote encode of %1 on %2 failed (%3); thread sleeping for %4s", - vf->frame(), server->host_name(), e.what(), remote_backoff) - ); - } - - } else { - try { - TIMING ("encoder thread %1 begins local encode of %2", boost::this_thread::get_id(), vf->frame()); - encoded = vf->encode_locally (); - TIMING ("encoder thread %1 finishes local encode of %2", boost::this_thread::get_id(), vf->frame()); - } catch (std::exception& e) { - _film->log()->log (String::compose ("Local encode failed (%1)", e.what ())); - } - } - - if (encoded) { - _writer->write (encoded, vf->frame ()); - frame_done (); - } else { - lock.lock (); - _film->log()->log ( - String::compose ("Encoder thread %1 pushes frame %2 back onto queue after failure", boost::this_thread::get_id(), vf->frame()) - ); - _queue.push_front (vf); - lock.unlock (); - } - - if (remote_backoff > 0) { - dvdomatic_sleep (remote_backoff); - } - - lock.lock (); - _condition.notify_all (); - } -} - -void -Encoder::write_audio (shared_ptr data) -{ - AudioMapping m (_film->audio_channels ()); - if (m.dcp_channels() != _film->audio_channels()) { - - /* Remap (currently just for mono -> 5.1) */ - - shared_ptr b (new AudioBuffers (m.dcp_channels(), data->frames ())); - for (int i = 0; i < m.dcp_channels(); ++i) { - optional s = m.dcp_to_source (static_cast (i)); - if (!s) { - b->make_silent (i); - } else { - memcpy (b->data()[i], data->data()[s.get()], data->frames() * sizeof(float)); - } - } - - data = b; - } - _writer->write (data); }