2 Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
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.
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.
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/>.
21 #include "upmixer_a.h"
22 #include "audio_buffers.h"
23 #include "audio_mapping.h"
30 using std::shared_ptr;
32 UpmixerA::UpmixerA (int sampling_rate)
33 : _left (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
34 , _right (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
35 , _centre (0.01, 150.0 / sampling_rate, 1900.0 / sampling_rate)
36 , _lfe (0.01, 150.0 / sampling_rate)
37 , _ls (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
38 , _rs (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
44 UpmixerA::name () const
46 return _("Stereo to 5.1 up-mixer A");
52 return N_("stereo-5.1-upmix-a");
56 UpmixerA::out_channels () const
61 shared_ptr<AudioProcessor>
62 UpmixerA::clone (int sampling_rate) const
64 return shared_ptr<AudioProcessor> (new UpmixerA (sampling_rate));
67 shared_ptr<AudioBuffers>
68 UpmixerA::run (shared_ptr<const AudioBuffers> in, int channels)
71 shared_ptr<AudioBuffers> in_L = in->channel (0);
72 shared_ptr<AudioBuffers> in_R = in->channel (1);
74 /* Mix of L and R; -6dB down in amplitude (3dB in terms of power) */
75 shared_ptr<AudioBuffers> in_LR = in_L->clone ();
76 in_LR->accumulate_frames (in_R.get(), in_R->frames(), 0, 0);
77 in_LR->apply_gain (-6);
80 vector<shared_ptr<AudioBuffers> > all_out;
81 all_out.push_back (_left.run (in_L));
82 all_out.push_back (_right.run (in_R));
83 all_out.push_back (_centre.run (in_LR));
84 all_out.push_back (_lfe.run (in_LR));
85 all_out.push_back (_ls.run (in_L));
86 all_out.push_back (_rs.run (in_R));
88 shared_ptr<AudioBuffers> out (new AudioBuffers (channels, in->frames ()));
89 int const N = min (channels, 6);
91 for (int i = 0; i < N; ++i) {
92 out->copy_channel_from (all_out[i].get(), 0, i);
95 for (int i = N; i < channels; ++i) {
114 UpmixerA::make_audio_mapping_default (AudioMapping& mapping) const
116 /* Just map the first two input channels to our L/R */
117 mapping.make_zero ();
118 for (int i = 0; i < min (2, mapping.input_channels()); ++i) {
119 mapping.set (i, i, 1);
124 UpmixerA::input_names () const
126 vector<NamedChannel> n;
127 n.push_back (NamedChannel(_("Upmix L"), 0));
128 n.push_back (NamedChannel(_("Upmix R"), 1));