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/*
Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
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.
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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/transcoder.cc
* @brief A class which takes a Film and some Options, then uses those to transcode the film.
*
* A decoder is selected according to the content type, and the encoder can be specified
* as a parameter to the constructor.
*/
#include "transcoder.h"
#include "encoder.h"
#include "film.h"
#include "video_decoder.h"
#include "audio_decoder.h"
#include "player.h"
#include "job.h"
#include "writer.h"
#include "compose.hpp"
#include "referenced_reel_asset.h"
#include "subtitle_content.h"
#include <boost/signals2.hpp>
#include <boost/foreach.hpp>
#include <iostream>
#include "i18n.h"
using std::string;
using std::cout;
using std::list;
using boost::shared_ptr;
using boost::weak_ptr;
using boost::dynamic_pointer_cast;
/** Construct a transcoder.
* @param f Film that we are transcoding.
* @param j Job that this transcoder is being used in.
*/
Transcoder::Transcoder (shared_ptr<const Film> film, shared_ptr<Job> j)
: _film (film)
, _job (j)
, _player (new Player (film, film->playlist ()))
, _writer (new Writer (film, j))
, _encoder (new Encoder (film, _writer))
, _finishing (false)
{
}
void
Transcoder::go ()
{
_writer->start ();
_encoder->begin ();
_job->sub (_("Encoding picture and sound"));
DCPTime const frame = DCPTime::from_frames (1, _film->video_frame_rate ());
DCPTime const length = _film->length ();
int burnt_subtitles = 0;
int non_burnt_subtitles = 0;
BOOST_FOREACH (shared_ptr<const Content> c, _film->content ()) {
if (c->subtitle && c->subtitle->use()) {
if (c->subtitle->burn()) {
++burnt_subtitles;
} else {
++non_burnt_subtitles;
}
}
}
if (non_burnt_subtitles) {
_writer->write (_player->get_subtitle_fonts ());
}
for (DCPTime t; t < length; t += frame) {
_encoder->encode (_player->get_video (t, true));
_writer->write (_player->get_audio (t, frame, true));
if (non_burnt_subtitles) {
_writer->write (_player->get_subtitles (t, frame, true, false, true));
}
_job->set_progress (float(t.get()) / length.get());
}
BOOST_FOREACH (ReferencedReelAsset i, _player->get_reel_assets ()) {
_writer->write (i);
}
_finishing = true;
_encoder->end ();
_writer->finish ();
}
float
Transcoder::current_encoding_rate () const
{
return _encoder->current_encoding_rate ();
}
int
Transcoder::video_frames_out () const
{
return _encoder->video_frames_out ();
}
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