blob: e40958a427bd866006684e571d5e98af6a8cb606 (
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
|
/*
Copyright (C) 2020-2021 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/>.
*/
#include "frame_interval_checker.h"
using namespace dcpomatic;
int const FrameIntervalChecker::_frames = 16;
void
FrameIntervalChecker::feed (ContentTime time, double frame_rate)
{
/* The caller isn't meant to feed too much data before
calling guess() and destroying the FrameIntervalChecker.
*/
DCPOMATIC_ASSERT (_intervals.size() < _frames);
if (_last) {
_intervals.push_back ((time - *_last).seconds() * frame_rate);
}
_last = time;
}
FrameIntervalChecker::Guess
FrameIntervalChecker::guess () const
{
if (_intervals.size() < _frames) {
/* How soon can you land?
* I can't tell.
* You can tell me, I'm a doctor.
* No I mean I'm just not sure.
* Can't you take a guess?
* Well, not for another two hours.
* You can't take a guess for another two hours?
*/
return AGAIN;
}
int near_1 = 0;
for (auto i: _intervals) {
if (i > 0.5) {
++near_1;
}
}
return (near_1 < 3 * _frames / 4) ? PROBABLY_3D : PROBABLY_NOT_3D;
}
|
