blob: edb532b9cc8474e0e474ac882d95d114fae71925 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
Copyright (C) 2012-2013 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/decoder.h
* @brief Parent class for decoders of content.
*/
#ifndef DCPOMATIC_DECODER_H
#define DCPOMATIC_DECODER_H
#include <vector>
#include <string>
#include <stdint.h>
#include <boost/shared_ptr.hpp>
#include <boost/signals2.hpp>
#include "video_source.h"
#include "audio_source.h"
#include "film.h"
class Image;
class Log;
class DelayLine;
class TimedSubtitle;
class Subtitle;
class FilterGraph;
/** @class Decoder.
* @brief Parent class for decoders of content.
*/
class Decoder
{
public:
Decoder (boost::shared_ptr<const Film>);
virtual ~Decoder () {}
/** Perform one decode pass of the content, which may or may not
* cause the object to emit some data.
*/
virtual void pass () = 0;
/** Seek this decoder to as close as possible to some time,
* expressed relative to our source's start.
* @param t Time.
* @param a true to try hard to be accurate, otherwise false.
*/
virtual void seek (Time) = 0;
/** Seek back one video frame */
virtual void seek_back () = 0;
/** Seek forward one video frame */
virtual void seek_forward () = 0;
/** @return Approximate time of the next content that we will emit,
* expressed relative to the start of our source.
*/
virtual Time next () const = 0;
protected:
/** The Film that we are decoding in */
boost::weak_ptr<const Film> _film;
private:
/** This will be called when our Film emits Changed */
virtual void film_changed (Film::Property) {}
/** Connection to our Film */
boost::signals2::scoped_connection _film_connection;
};
#endif
|
