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"
24 #include <boost/make_shared.hpp>
31 using boost::shared_ptr;
32 using boost::make_shared;
34 UpmixerA::UpmixerA (int sampling_rate)
35 : _left (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
36 , _right (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
37 , _centre (0.01, 150.0 / sampling_rate, 1900.0 / sampling_rate)
38 , _lfe (0.01, 150.0 / sampling_rate)
39 , _ls (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
40 , _rs (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
46 UpmixerA::name () const
48 return _("Stereo to 5.1 up-mixer A");
54 return N_("stereo-5.1-upmix-a");
58 UpmixerA::out_channels () const
63 shared_ptr<AudioProcessor>
64 UpmixerA::clone (int sampling_rate) const
66 return make_shared<UpmixerA> (sampling_rate);
69 shared_ptr<AudioBuffers>
70 UpmixerA::run (shared_ptr<const AudioBuffers> in, int channels)
73 shared_ptr<AudioBuffers> in_L = in->channel (0);
74 shared_ptr<AudioBuffers> in_R = in->channel (1);
76 /* Mix of L and R; -6dB down in amplitude (3dB in terms of power) */
77 shared_ptr<AudioBuffers> in_LR = in_L->clone ();
78 in_LR->accumulate_frames (in_R.get(), 0, 0, in_R->frames ());
79 in_LR->apply_gain (-6);
82 vector<shared_ptr<AudioBuffers> > all_out;
83 all_out.push_back (_left.run (in_L));
84 all_out.push_back (_right.run (in_R));
85 all_out.push_back (_centre.run (in_LR));
86 all_out.push_back (_lfe.run (in_LR));
87 all_out.push_back (_ls.run (in_L));
88 all_out.push_back (_rs.run (in_R));
90 shared_ptr<AudioBuffers> out = make_shared<AudioBuffers> (channels, in->frames ());
91 int const N = min (channels, 6);
93 for (int i = 0; i < N; ++i) {
94 out->copy_channel_from (all_out[i].get(), 0, i);
97 for (int i = N; i < channels; ++i) {
116 UpmixerA::make_audio_mapping_default (AudioMapping& mapping) const
118 /* Just map the first two input channels to our L/R */
119 mapping.make_zero ();
120 for (int i = 0; i < min (2, mapping.input_channels()); ++i) {
121 mapping.set (i, i, 1);
126 UpmixerA::input_names () const
129 n.push_back (_("Upmix L"));
130 n.push_back (_("Upmix R"));