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/*
Copyright (C) 2014-2021 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/dcp_decoder.h
* @brief A decoder of existing DCPs.
*/
#include "atmos_metadata.h"
#include "decoder.h"
#include "font_id_allocator.h"
#include <dcp/mono_j2k_picture_asset_reader.h>
#include <dcp/stereo_j2k_picture_asset_reader.h>
#include <dcp/mono_mpeg2_picture_asset_reader.h>
#include <dcp/mpeg2_transcode.h>
#include <dcp/sound_asset_reader.h>
#include <dcp/text_asset.h>
namespace dcp {
class Reel;
}
class DCPContent;
class Log;
struct dcp_subtitle_within_dcp_test;
class DCPDecoder : public Decoder
{
public:
DCPDecoder (
std::shared_ptr<const Film> film,
std::shared_ptr<const DCPContent> content,
bool fast,
bool tolerant,
std::shared_ptr<DCPDecoder> old
);
std::vector<std::shared_ptr<dcp::Reel>> reels () const {
return _reels;
}
void set_decode_referenced (bool r);
void set_forced_reduction (boost::optional<int> reduction);
bool pass () override;
void seek (dcpomatic::ContentTime t, bool accurate) override;
std::string lazy_digest () const {
return _lazy_digest;
}
dcpomatic::ContentTime position () const override;
private:
friend struct dcp_subtitle_within_dcp_test;
void next_reel ();
void get_readers ();
void pass_texts (dcpomatic::ContentTime next, dcp::Size size);
void pass_texts (
dcpomatic::ContentTime next,
std::shared_ptr<dcp::TextAsset> asset,
bool reference,
int64_t entry_point,
std::shared_ptr<TextDecoder> decoder,
dcp::Size size
);
std::string calculate_lazy_digest (std::shared_ptr<const DCPContent>) const;
std::shared_ptr<const DCPContent> _dcp_content;
/** Time of next thing to return from pass relative to the start of _reel */
dcpomatic::ContentTime _next;
std::vector<std::shared_ptr<dcp::Reel>> _reels;
std::vector<std::shared_ptr<dcp::Reel>>::iterator _reel;
/** Offset of _reel from the start of the content in frames */
int64_t _offset = 0;
/** Reader for current J2K mono picture asset, if applicable */
std::shared_ptr<dcp::MonoJ2KPictureAssetReader> _j2k_mono_reader;
/** Reader for current J2K stereo picture asset, if applicable */
std::shared_ptr<dcp::StereoJ2KPictureAssetReader> _j2k_stereo_reader;
/** Reader for current MPEG2 mono picture asset, if applicable */
std::shared_ptr<dcp::MonoMPEG2PictureAssetReader> _mpeg2_mono_reader;
/** Reader for current sound asset, if applicable */
std::shared_ptr<dcp::SoundAssetReader> _sound_reader;
std::shared_ptr<dcp::AtmosAssetReader> _atmos_reader;
boost::optional<AtmosMetadata> _atmos_metadata;
std::shared_ptr<dcp::MPEG2Decompressor> _mpeg2_decompressor;
bool _decode_referenced = false;
boost::optional<int> _forced_reduction;
std::string _lazy_digest;
FontIDAllocator _font_id_allocator;
};
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