2 Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "upmixer_a.h"
21 #include "audio_buffers.h"
22 #include "audio_mapping.h"
29 using boost::shared_ptr;
31 UpmixerA::UpmixerA (int sampling_rate)
32 : _left (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
33 , _right (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
34 , _centre (0.02, 150.0 / sampling_rate, 1900.0 / sampling_rate)
35 , _lfe (0.02, 20.0 / sampling_rate, 150.0 / sampling_rate)
36 , _ls (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
37 , _rs (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
43 UpmixerA::name () const
45 return _("Stereo to 5.1 up-mixer A");
52 return N_("stereo-5.1-upmix-a");
56 UpmixerA::in_channels () const
58 return ChannelCount (2);
62 UpmixerA::out_channels () const
67 shared_ptr<AudioProcessor>
68 UpmixerA::clone (int sampling_rate) const
70 return shared_ptr<AudioProcessor> (new UpmixerA (sampling_rate));
73 shared_ptr<AudioBuffers>
74 UpmixerA::run (shared_ptr<const AudioBuffers> in)
77 shared_ptr<AudioBuffers> in_L = in->channel (0);
78 shared_ptr<AudioBuffers> in_R = in->channel (1);
81 shared_ptr<AudioBuffers> in_LR = in_L->clone ();
82 in_LR->accumulate_frames (in_R.get(), 0, 0, in_R->frames ());
83 in_LR->apply_gain (0.5);
86 shared_ptr<AudioBuffers> L = _left.run (in_L);
87 shared_ptr<AudioBuffers> R = _right.run (in_R);
88 shared_ptr<AudioBuffers> C = _centre.run (in_LR);
89 shared_ptr<AudioBuffers> Lfe = _lfe.run (in_LR);
90 shared_ptr<AudioBuffers> Ls = _ls.run (in_L);
91 shared_ptr<AudioBuffers> Rs = _rs.run (in_R);
93 shared_ptr<AudioBuffers> out (new AudioBuffers (6, in->frames ()));
94 out->copy_channel_from (L.get(), 0, 0);
95 out->copy_channel_from (R.get(), 0, 1);
96 out->copy_channel_from (C.get(), 0, 2);
97 out->copy_channel_from (Lfe.get(), 0, 3);
98 out->copy_channel_from (Ls.get(), 0, 4);
99 out->copy_channel_from (Rs.get(), 0, 5);
115 UpmixerA::make_audio_mapping_default (AudioMapping& mapping) const
117 /* Just map the first two input channels to our L/R */
118 mapping.make_zero ();
119 for (int i = 0; i < min (2, mapping.input_channels()); ++i) {
120 mapping.set (i, i, 1);
125 UpmixerA::input_names () const
128 n.push_back (_("Upmix L"));
129 n.push_back (_("Upmix R"));