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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
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/>.
*/
#include "upmixer_a.h"
#include "audio_buffers.h"
#include "audio_mapping.h"
#include "i18n.h"
using std::make_shared;
using std::min;
using std::shared_ptr;
using std::string;
using std::vector;
UpmixerA::UpmixerA (int sampling_rate)
: _left (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
, _right (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
, _centre (0.01, 150.0 / sampling_rate, 1900.0 / sampling_rate)
, _lfe (0.01, 150.0 / sampling_rate)
, _ls (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
, _rs (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
{
}
string
UpmixerA::name () const
{
return _("Stereo to 5.1 up-mixer A");
}
string
UpmixerA::id () const
{
return N_("stereo-5.1-upmix-a");
}
int
UpmixerA::out_channels () const
{
return 6;
}
shared_ptr<AudioProcessor>
UpmixerA::clone (int sampling_rate) const
{
return make_shared<UpmixerA>(sampling_rate);
}
shared_ptr<AudioBuffers>
UpmixerA::run (shared_ptr<const AudioBuffers> in, int channels)
{
/* Input L and R */
auto in_L = in->channel (0);
auto in_R = in->channel (1);
/* Mix of L and R; -6dB down in amplitude (3dB in terms of power) */
auto in_LR = in_L->clone ();
in_LR->accumulate_frames (in_R.get(), in_R->frames(), 0, 0);
in_LR->apply_gain (-6);
/* Run filters */
vector<shared_ptr<AudioBuffers>> all_out;
all_out.push_back (_left.run(in_L));
all_out.push_back (_right.run(in_R));
all_out.push_back (_centre.run(in_LR));
all_out.push_back (_lfe.run(in_LR));
all_out.push_back (_ls.run(in_L));
all_out.push_back (_rs.run(in_R));
auto out = make_shared<AudioBuffers>(channels, in->frames());
int const N = min (channels, 6);
for (int i = 0; i < N; ++i) {
out->copy_channel_from (all_out[i].get(), 0, i);
}
for (int i = N; i < channels; ++i) {
out->make_silent (i);
}
return out;
}
void
UpmixerA::flush ()
{
_left.flush ();
_right.flush ();
_centre.flush ();
_lfe.flush ();
_ls.flush ();
_rs.flush ();
}
void
UpmixerA::make_audio_mapping_default (AudioMapping& mapping) const
{
/* Just map the first two input channels to our L/R */
mapping.make_zero ();
for (int i = 0; i < min (2, mapping.input_channels()); ++i) {
mapping.set (i, i, 1);
}
}
vector<NamedChannel>
UpmixerA::input_names () const
{
return {
NamedChannel(_("Upmix L"), 0),
NamedChannel(_("Upmix R"), 1)
};
}
|
