X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fupmixer_a.cc;h=f402b6691fc982fc180302d9792c9f8d395559b6;hb=fc1441eeaa3c0805c37809685ea7a3f5ca173666;hp=dce08fe37431212f33bfa11d2c8527e2662c5ae9;hpb=39029279954b1f346d3ba28ec12c58211bfa7436;p=dcpomatic.git

diff --git a/src/lib/upmixer_a.cc b/src/lib/upmixer_a.cc
index dce08fe37..f402b6691 100644
--- a/src/lib/upmixer_a.cc
+++ b/src/lib/upmixer_a.cc
@@ -1,41 +1,50 @@
 /*
-    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2014-2021 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
+
 #include "upmixer_a.h"
 #include "audio_buffers.h"
+#include "audio_mapping.h"
 
 #include "i18n.h"
 
+
+using std::make_shared;
+using std::min;
+using std::shared_ptr;
 using std::string;
-using boost::shared_ptr;
+using std::vector;
+
 
 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)
 {
 
 }
 
+
 string
 UpmixerA::name () const
 {
@@ -49,51 +58,53 @@ 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<AudioProcessor>
 UpmixerA::clone (int sampling_rate) const
 {
-	return shared_ptr<AudioProcessor> (new UpmixerA (sampling_rate));
+	return make_shared<UpmixerA>(sampling_rate);
 }
 
+
 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);
+	auto in_L = in->channel (0);
+	auto in_R = in->channel (1);
 
-	/* Mix of L and R */
-	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);
+	/* Mix of L and R; -6dB down in amplitude (3dB in terms of power) */
+	auto in_LR = in_L->clone ();
+	in_LR->accumulate_frames (in_R.get(), in_R->frames(), 0, 0);
+	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));
+
+	auto out = make_shared<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;
 }
 
@@ -107,3 +118,24 @@ UpmixerA::flush ()
 	_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<NamedChannel>
+UpmixerA::input_names () const
+{
+	return {
+		NamedChannel(_("Upmix L"), 0),
+		NamedChannel(_("Upmix R"), 1)
+	};
+}