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/*
Copyright (C) 2012 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
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,
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.
*/
#include <iostream>
#include <boost/shared_ptr.hpp>
#include "ab_transcoder.h"
#include "film.h"
#include "video_decoder.h"
#include "audio_decoder.h"
#include "encoder.h"
#include "job.h"
#include "options.h"
#include "image.h"
#include "decoder_factory.h"
#include "matcher.h"
#include "delay_line.h"
#include "gain.h"
#include "combiner.h"
#include "trimmer.h"
/** @file src/ab_transcoder.cc
* @brief A transcoder which uses one Film for the left half of the screen, and a different one
* for the right half (to facilitate A/B comparisons of settings)
*/
using std::string;
using boost::shared_ptr;
using boost::dynamic_pointer_cast;
/** @param a Film to use for the left half of the screen.
* @param b Film to use for the right half of the screen.
* @param o Decoder options.
* @param j Job that we are associated with.
* @param e Encoder to use.
*/
ABTranscoder::ABTranscoder (
shared_ptr<Film> a, shared_ptr<Film> b, DecodeOptions o, Job* j, shared_ptr<Encoder> e)
: _film_a (a)
, _film_b (b)
, _job (j)
, _encoder (e)
, _combiner (new Combiner (a->log()))
{
_da = decoder_factory (_film_a, o);
_db = decoder_factory (_film_b, o);
shared_ptr<AudioStream> st = _film_a->audio_stream();
if (st && st->sample_rate()) {
_matcher.reset (new Matcher (_film_a->log(), st->sample_rate(), _film_a->source_frame_rate()));
}
_delay_line.reset (new DelayLine (_film_a->log(), _film_a->audio_delay() / 1000.0f));
_gain.reset (new Gain (_film_a->log(), _film_a->audio_gain()));
int const sr = st ? st->sample_rate() : 0;
int const trim_start = _film_a->trim_type() == Film::ENCODE ? _film_a->trim_start() : 0;
int const trim_end = _film_a->trim_type() == Film::ENCODE ? _film_a->trim_end() : 0;
_trimmer.reset (new Trimmer (
_film_a->log(), trim_start, trim_end, _film_a->length().get(),
sr, _film_a->source_frame_rate(), _film_a->dcp_frame_rate()
));
/* Set up the decoder to use the film's set streams */
_da.video->set_subtitle_stream (_film_a->subtitle_stream ());
_db.video->set_subtitle_stream (_film_a->subtitle_stream ());
if (_film_a->audio_stream ()) {
_da.audio->set_audio_stream (_film_a->audio_stream ());
}
_da.video->Video.connect (bind (&Combiner::process_video, _combiner, _1, _2, _3, _4));
_db.video->Video.connect (bind (&Combiner::process_video_b, _combiner, _1, _2, _3, _4));
_combiner->connect_video (_delay_line);
if (_matcher) {
_delay_line->connect_video (_matcher);
_matcher->connect_video (_trimmer);
} else {
_delay_line->connect_video (_trimmer);
}
_trimmer->connect_video (_encoder);
_da.audio->connect_audio (_delay_line);
if (_matcher) {
_delay_line->connect_audio (_matcher);
_matcher->connect_audio (_gain);
} else {
_delay_line->connect_audio (_gain);
}
_gain->connect_audio (_trimmer);
_trimmer->connect_audio (_encoder);
}
void
ABTranscoder::go ()
{
_encoder->process_begin ();
bool done[3] = { false, false, false };
while (1) {
done[0] = _da.video->pass ();
done[1] = _db.video->pass ();
if (!done[2] && _da.audio && dynamic_pointer_cast<Decoder> (_da.audio) != dynamic_pointer_cast<Decoder> (_da.video)) {
done[2] = _da.audio->pass ();
} else {
done[2] = true;
}
if (_job) {
_da.video->set_progress (_job);
}
if (done[0] && done[1] && done[2]) {
break;
}
}
_delay_line->process_end ();
if (_matcher) {
_matcher->process_end ();
}
_gain->process_end ();
_encoder->process_end ();
}
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