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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/examine_content_job.cc
* @brief A class to run through content at high speed to find its length.
*/
#include <boost/filesystem.hpp>
#include "examine_content_job.h"
#include "options.h"
#include "decoder_factory.h"
#include "decoder.h"
#include "transcoder.h"
#include "log.h"
#include "film.h"
#include "video_decoder.h"
#include "i18n.h"
using std::string;
using std::vector;
using std::pair;
using boost::shared_ptr;
ExamineContentJob::ExamineContentJob (shared_ptr<Film> f)
: Job (f)
{
}
ExamineContentJob::~ExamineContentJob ()
{
}
string
ExamineContentJob::name () const
{
if (_film->name().empty ()) {
return _("Examine content");
}
return String::compose (_("Examine content of %1"), _film->name());
}
void
ExamineContentJob::run ()
{
descend (0.5);
_film->set_content_digest (md5_digest (_film->content_path ()));
ascend ();
descend (0.5);
/* Set the film's length to either
a) a length judged by running through the content or
b) the length from a decoder's header.
*/
if (!_film->trust_content_header()) {
/* Decode the content to get an accurate length */
/* We don't want to use any existing length here, as progress
will be messed up.
*/
_film->unset_length ();
_film->set_crop (Crop ());
DecodeOptions o;
o.decode_audio = false;
Decoders decoders = decoder_factory (_film, o);
set_progress_unknown ();
while (!decoders.video->pass()) {
/* keep going */
}
_film->set_length (decoders.video->video_frame());
_film->log()->log (String::compose (N_("Video length examined as %1 frames"), _film->length().get()));
} else {
/* Get a quick decoder to get the content's length from its header */
Decoders d = decoder_factory (_film, DecodeOptions());
_film->set_length (d.video->length());
_film->log()->log (String::compose (N_("Video length obtained from header as %1 frames"), _film->length().get()));
}
ascend ();
set_progress (1);
set_state (FINISHED_OK);
}
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