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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.
*/
/** @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 <iostream>
#include <boost/signals2.hpp>
#include "transcoder.h"
#include "encoder.h"
#include "decoder_factory.h"
using std::string;
using boost::shared_ptr;
/** Construct a transcoder using a Decoder that we create and a supplied Encoder.
* @param f Film that we are transcoding.
* @param o Options.
* @param j Job that we are running under, or 0.
* @param e Encoder to use.
*/
Transcoder::Transcoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j, shared_ptr<Encoder> e)
: _job (j)
, _encoder (e)
, _decoder (decoder_factory (f, o, j))
{
assert (_encoder);
_decoder->Video.connect (bind (&Encoder::process_video, e, _1, _2, _3));
_decoder->Audio.connect (bind (&Encoder::process_audio, e, _1));
}
/** Run the decoder, passing its output to the encoder, until the decoder
* has no more data to present.
*/
void
Transcoder::go ()
{
_encoder->process_begin (_decoder->audio_channel_layout());
try {
_decoder->go ();
} catch (...) {
/* process_end() is important as the decoder may have worker
threads that need to be cleaned up.
*/
_encoder->process_end ();
throw;
}
_encoder->process_end ();
}
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