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/*
Copyright (C) 2012-2018 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/>.
*/
#include "video_decoder.h"
#include "image.h"
#include "raw_image_proxy.h"
#include "film.h"
#include "log.h"
#include "compose.hpp"
#include <boost/foreach.hpp>
#include <iostream>
#include "i18n.h"
using std::cout;
using std::list;
using std::max;
using std::back_inserter;
using boost::shared_ptr;
using boost::optional;
VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr<const Content> c)
: DecoderPart (parent)
, _content (c)
{
}
/** Called by decoder classes when they have a video frame ready.
* @param frame Frame index within the content; this does not take into account 3D
* so for 3D_ALTERNATE this value goes:
* 0: frame 0 left
* 1: frame 0 right
* 2: frame 1 left
* 3: frame 1 right
* and so on.
*/
void
VideoDecoder::emit (shared_ptr<const Film> film, shared_ptr<const ImageProxy> image, Frame frame)
{
if (ignore ()) {
return;
}
switch (_content->video->frame_type ()) {
case VIDEO_FRAME_TYPE_2D:
Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE));
break;
case VIDEO_FRAME_TYPE_3D:
{
/* We should receive the same frame index twice for 3D; hence we know which
frame this one is.
*/
bool const same = (_last_emitted_frame && _last_emitted_frame.get() == frame);
if (!same && _last_emitted_eyes && *_last_emitted_eyes == EYES_LEFT) {
/* We just got a new frame index but the last frame was left-eye; it looks like
this content is not really 3D.
*/
boost::throw_exception (
DecodeError(
String::compose(
_("The content file %1 is set as 3D but does not appear to contain 3D images. Please set it to 2D. "
"You can still make a 3D DCP from this content by ticking the 3D option in the DCP video tab."),
_content->path(0)
)
)
);
}
Eyes const eyes = same ? EYES_RIGHT : EYES_LEFT;
Data (ContentVideo (image, frame, eyes, PART_WHOLE));
_last_emitted_frame = frame;
_last_emitted_eyes = eyes;
break;
}
case VIDEO_FRAME_TYPE_3D_ALTERNATE:
Data (ContentVideo (image, frame / 2, (frame % 2) ? EYES_RIGHT : EYES_LEFT, PART_WHOLE));
frame /= 2;
break;
case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
Data (ContentVideo (image, frame, EYES_LEFT, PART_LEFT_HALF));
Data (ContentVideo (image, frame, EYES_RIGHT, PART_RIGHT_HALF));
break;
case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
Data (ContentVideo (image, frame, EYES_LEFT, PART_TOP_HALF));
Data (ContentVideo (image, frame, EYES_RIGHT, PART_BOTTOM_HALF));
break;
case VIDEO_FRAME_TYPE_3D_LEFT:
Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE));
break;
case VIDEO_FRAME_TYPE_3D_RIGHT:
Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE));
break;
default:
DCPOMATIC_ASSERT (false);
}
_position = ContentTime::from_frames (frame, _content->active_video_frame_rate(film));
}
void
VideoDecoder::seek ()
{
_position = ContentTime();
_last_emitted_frame.reset ();
_last_emitted_eyes.reset ();
}
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