2 Copyright (C) 2014 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"
26 using boost::shared_ptr;
28 UpmixerA::UpmixerA (int sampling_rate)
29 : _left (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
30 , _right (0.02, 1900.0 / sampling_rate, 4800.0 / sampling_rate)
31 , _centre (0.02, 150.0 / sampling_rate, 1900.0 / sampling_rate)
32 , _lfe (0.02, 20.0 / sampling_rate, 150.0 / sampling_rate)
33 , _ls (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
34 , _rs (0.02, 4800.0 / sampling_rate, 20000.0 / sampling_rate)
40 UpmixerA::name () const
42 return _("Stereo to 5.1 up-mixer A");
49 return N_("stereo-5.1-upmix-a");
53 UpmixerA::in_channels () const
55 return ChannelCount (2);
59 UpmixerA::out_channels (int) const
64 shared_ptr<AudioProcessor>
65 UpmixerA::clone (int sampling_rate) const
67 return shared_ptr<AudioProcessor> (new UpmixerA (sampling_rate));
70 shared_ptr<AudioBuffers>
71 UpmixerA::run (shared_ptr<const AudioBuffers> in)
74 shared_ptr<AudioBuffers> in_L = in->channel (0);
75 shared_ptr<AudioBuffers> in_R = in->channel (1);
78 shared_ptr<AudioBuffers> in_LR = in_L->clone ();
79 in_LR->accumulate_frames (in_R.get(), 0, 0, in_R->frames ());
80 in_LR->apply_gain (0.5);
83 shared_ptr<AudioBuffers> L = _left.run (in_L);
84 shared_ptr<AudioBuffers> R = _right.run (in_R);
85 shared_ptr<AudioBuffers> C = _centre.run (in_LR);
86 shared_ptr<AudioBuffers> Lfe = _lfe.run (in_LR);
87 shared_ptr<AudioBuffers> Ls = _ls.run (in_L);
88 shared_ptr<AudioBuffers> Rs = _rs.run (in_R);
90 shared_ptr<AudioBuffers> out (new AudioBuffers (6, in->frames ()));
91 out->copy_channel_from (L.get(), 0, 0);
92 out->copy_channel_from (R.get(), 0, 1);
93 out->copy_channel_from (C.get(), 0, 2);
94 out->copy_channel_from (Lfe.get(), 0, 3);
95 out->copy_channel_from (Ls.get(), 0, 4);
96 out->copy_channel_from (Rs.get(), 0, 5);