Trying to create export audio encoders with between 9 and 15 channels
[dcpomatic.git] / src / lib / dcp_decoder.h
1 /*
2     Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
3
4     This file is part of DCP-o-matic.
5
6     DCP-o-matic is free software; you can redistribute it and/or modify
7     it under the terms of the GNU General Public License as published by
8     the Free Software Foundation; either version 2 of the License, or
9     (at your option) any later version.
10
11     DCP-o-matic is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14     GNU General Public License for more details.
15
16     You should have received a copy of the GNU General Public License
17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
18
19 */
20
21 /** @file  src/dcp_decoder.h
22  *  @brief A decoder of existing DCPs.
23  */
24
25 #include "atmos_metadata.h"
26 #include "decoder.h"
27 #include "dcp.h"
28 #include <dcp/mono_picture_asset_reader.h>
29 #include <dcp/stereo_picture_asset_reader.h>
30 #include <dcp/sound_asset_reader.h>
31 #include <dcp/subtitle_asset.h>
32
33 namespace dcp {
34         class Reel;
35 }
36
37 class DCPContent;
38 class Log;
39 struct dcp_subtitle_within_dcp_test;
40
41 class DCPDecoder : public DCP, public Decoder
42 {
43 public:
44         DCPDecoder (
45                 boost::shared_ptr<const Film> film,
46                 boost::shared_ptr<const DCPContent>,
47                 bool fast,
48                 bool tolerant,
49                 boost::shared_ptr<DCPDecoder> old
50                 );
51
52         std::list<boost::shared_ptr<dcp::Reel> > reels () const {
53                 return _reels;
54         }
55
56         void set_decode_referenced (bool r);
57         void set_forced_reduction (boost::optional<int> reduction);
58
59         bool pass ();
60         void seek (dcpomatic::ContentTime t, bool accurate);
61
62         std::string lazy_digest () const {
63                 return _lazy_digest;
64         }
65
66         dcpomatic::ContentTime position () const;
67
68 private:
69         friend struct dcp_subtitle_within_dcp_test;
70
71         void next_reel ();
72         void get_readers ();
73         void pass_texts (dcpomatic::ContentTime next, dcp::Size size);
74         void pass_texts (
75                 dcpomatic::ContentTime next,
76                 boost::shared_ptr<dcp::SubtitleAsset> asset,
77                 bool reference,
78                 int64_t entry_point,
79                 boost::shared_ptr<TextDecoder> decoder,
80                 dcp::Size size
81                 );
82         std::string calculate_lazy_digest (boost::shared_ptr<const DCPContent>) const;
83
84         /** Time of next thing to return from pass relative to the start of _reel */
85         dcpomatic::ContentTime _next;
86         std::list<boost::shared_ptr<dcp::Reel> > _reels;
87
88         std::list<boost::shared_ptr<dcp::Reel> >::iterator _reel;
89         /** Offset of _reel from the start of the content in frames */
90         int64_t _offset;
91         /** Reader for current mono picture asset, if applicable */
92         boost::shared_ptr<dcp::MonoPictureAssetReader> _mono_reader;
93         /** Reader for current stereo picture asset, if applicable */
94         boost::shared_ptr<dcp::StereoPictureAssetReader> _stereo_reader;
95         /** Reader for current sound asset, if applicable */
96         boost::shared_ptr<dcp::SoundAssetReader> _sound_reader;
97         boost::shared_ptr<dcp::AtmosAssetReader> _atmos_reader;
98         boost::optional<AtmosMetadata> _atmos_metadata;
99
100         bool _decode_referenced;
101         boost::optional<int> _forced_reduction;
102
103         std::string _lazy_digest;
104 };