/*
- Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "upmixer_a.h"
#include "audio_buffers.h"
+#include "audio_mapping.h"
#include "i18n.h"
using std::string;
+using std::min;
+using std::vector;
using boost::shared_ptr;
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 (0.02, 150.0 / sampling_rate, 1900.0 / sampling_rate)
- , _lfe (0.02, 20.0 / sampling_rate, 150.0 / 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)
{
return _("Stereo to 5.1 up-mixer A");
}
-
string
UpmixerA::id () const
{
return N_("stereo-5.1-upmix-a");
}
-ChannelCount
-UpmixerA::in_channels () const
-{
- return ChannelCount (2);
-}
-
int
-UpmixerA::out_channels (int) const
+UpmixerA::out_channels () const
{
return 6;
}
}
shared_ptr<AudioBuffers>
-UpmixerA::run (shared_ptr<const AudioBuffers> in)
+UpmixerA::run (shared_ptr<const AudioBuffers> in, int channels)
{
/* Input L and R */
shared_ptr<AudioBuffers> in_L = in->channel (0);
shared_ptr<AudioBuffers> in_R = in->channel (1);
- /* Mix of L and R */
+ /* Mix of L and R; -6dB down in amplitude (3dB in terms of power) */
shared_ptr<AudioBuffers> in_LR = in_L->clone ();
in_LR->accumulate_frames (in_R.get(), 0, 0, in_R->frames ());
- in_LR->apply_gain (0.5);
+ in_LR->apply_gain (-6);
/* Run filters */
- shared_ptr<AudioBuffers> L = _left.run (in_L);
- shared_ptr<AudioBuffers> R = _right.run (in_R);
- shared_ptr<AudioBuffers> C = _centre.run (in_LR);
- shared_ptr<AudioBuffers> Lfe = _lfe.run (in_LR);
- shared_ptr<AudioBuffers> Ls = _ls.run (in_L);
- shared_ptr<AudioBuffers> Rs = _rs.run (in_R);
-
- shared_ptr<AudioBuffers> out (new AudioBuffers (6, in->frames ()));
- out->copy_channel_from (L.get(), 0, 0);
- out->copy_channel_from (R.get(), 0, 1);
- out->copy_channel_from (C.get(), 0, 2);
- out->copy_channel_from (Lfe.get(), 0, 3);
- out->copy_channel_from (Ls.get(), 0, 4);
- out->copy_channel_from (Rs.get(), 0, 5);
+ 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));
+
+ shared_ptr<AudioBuffers> out (new 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;
}
_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<string>
+UpmixerA::input_names () const
+{
+ vector<string> n;
+ n.push_back (_("Upmix L"));
+ n.push_back (_("Upmix R"));
+ return n;
+}