Basic support for calculating audio gains based on the sound processor's gain curve.

9 files changed, 272 insertions, 1 deletions

diff --git a/src/lib/config.cc b/src/lib/config.cc
index 92044d81a..53674645d 100644
--- a/src/lib/config.cc
+++ b/src/lib/config.cc
@@ -27,6 +27,7 @@
 #include "scaler.h"
 #include "screen.h"
 #include "filter.h"
+#include "sound_processor.h"
 
 using namespace std;
 using namespace boost;
@@ -41,6 +42,7 @@ Config::Config ()
 	, _j2k_bandwidth (250000000)
 	, _reference_scaler (Scaler::from_id ("bicubic"))
 	, _tms_path (".")
+	, _sound_processor (SoundProcessor::from_id ("dolby_cp750"))
 {
 	ifstream f (file().c_str ());
 	string line;
@@ -85,6 +87,8 @@ Config::Config ()
 			_tms_user = v;
 		} else if (k == "tms_password") {
 			_tms_password = v;
+		} else if (k == "sound_processor") {
+			_sound_processor = SoundProcessor::from_id (v);
 		}
 	}
 
@@ -139,4 +143,5 @@ Config::write () const
 	f << "tms_path " << _tms_path << "\n";
 	f << "tms_user " << _tms_user << "\n";
 	f << "tms_password " << _tms_password << "\n";
+	f << "sound_processor " << _sound_processor->id ();
 }
diff --git a/src/lib/config.h b/src/lib/config.h
index cbb83ad86..64bcf4d86 100644
--- a/src/lib/config.h
+++ b/src/lib/config.h
@@ -32,6 +32,7 @@ class Server;
 class Screen;
 class Scaler;
 class Filter;
+class SoundProcessor;
 
 /** @class Config
  *  @brief A singleton class holding configuration.
@@ -97,6 +98,10 @@ public:
 		return _tms_password;
 	}
 
+	SoundProcessor const * sound_processor () const {
+		return _sound_processor;
+	}
+
 	/** @param n New number of local encoding threads */
 	void set_num_local_encoding_threads (int n) {
 		_num_local_encoding_threads = n;
@@ -200,6 +205,8 @@ private:
 	std::string _tms_user;
 	std::string _tms_password;
 
+	SoundProcessor const * _sound_processor;
+
 	/** Singleton instance, or 0 */
 	static Config* _instance;
 };
diff --git a/src/lib/dolby_cp750.cc b/src/lib/dolby_cp750.cc
new file mode 100644
index 000000000..262e57bc7
--- /dev/null
+++ b/src/lib/dolby_cp750.cc
@@ -0,0 +1,58 @@
+/*
+    Copyright (C) 2012 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
+    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,
+    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.
+
+*/
+
+#include "dolby_cp750.h"
+
+using namespace std;
+
+DolbyCP750::DolbyCP750 ()
+	: SoundProcessor ("dolby_cp750", "Dolby CP750")
+{
+
+}
+
+float
+DolbyCP750::db_for_fader_change (float from, float to) const
+{
+	float db = 0;
+
+	if (from < to) {
+		if (from <= 4) {
+			float const t = min (to, 4.0f);
+			db += (t - from) * 20;
+		}
+		
+		if (to > 4) {
+			float const t = max (from, 4.0f);
+			db += (to - t) * 3.33333333333333333;
+		}
+	} else {
+		if (from >= 4) {
+			float const t = max (to, 4.0f);
+			db -= (from - t) * 3.33333333333333333;
+		}
+
+		if (to < 4) {
+			float const t = min (from, 4.0f);
+			db -= (t - to) * 20;
+		}
+	}
+
+	return db;
+}
diff --git a/src/lib/dolby_cp750.h b/src/lib/dolby_cp750.h
new file mode 100644
index 000000000..b6c0e7df2
--- /dev/null
+++ b/src/lib/dolby_cp750.h
@@ -0,0 +1,28 @@
+/*
+    Copyright (C) 2012 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
+    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,
+    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.
+
+*/
+
+#include "sound_processor.h"
+
+class DolbyCP750 : public SoundProcessor
+{
+public:
+	DolbyCP750 ();
+
+	float db_for_fader_change (float from, float to) const;
+};
diff --git a/src/lib/scaler.h b/src/lib/scaler.h
index 8ededfe2a..d5a83f732 100644
--- a/src/lib/scaler.h
+++ b/src/lib/scaler.h
@@ -71,7 +71,7 @@ private:
 	/** user-visible name for this scaler */
 	std::string _name;
 
-	/** sll available scalers */
+	/** all available scalers */
 	static std::vector<Scaler const *> _scalers;
 };
 
diff --git a/src/lib/sound_processor.cc b/src/lib/sound_processor.cc
new file mode 100644
index 000000000..9be6621cc
--- /dev/null
+++ b/src/lib/sound_processor.cc
@@ -0,0 +1,103 @@
+/*
+    Copyright (C) 2012 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
+    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,
+    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.
+
+*/
+
+/** @file src/sound_processor.cc
+ *  @brief A class to describe a sound processor.
+ */
+
+#include <iostream>
+#include <cassert>
+#include "sound_processor.h"
+#include "dolby_cp750.h"
+
+using namespace std;
+
+vector<SoundProcessor const *> SoundProcessor::_sound_processors;
+
+/** @param i Our id.
+ *  @param n User-visible name.
+ */
+SoundProcessor::SoundProcessor (string i, string n)
+	: _id (i)
+	, _name (n)
+{
+
+}
+
+/** @return All available sound processors */
+vector<SoundProcessor const *>
+SoundProcessor::all ()
+{
+	return _sound_processors;
+}
+
+/** Set up the static _sound_processors vector; must be called before from_*
+ *  methods are used.
+ */
+void
+SoundProcessor::setup_sound_processors ()
+{
+	_sound_processors.push_back (new DolbyCP750);
+}
+
+/** @param id One of our ids.
+ *  @return Corresponding sound processor, or 0.
+ */
+SoundProcessor const *
+SoundProcessor::from_id (string id)
+{
+	vector<SoundProcessor const *>::iterator i = _sound_processors.begin ();
+	while (i != _sound_processors.end() && (*i)->id() != id) {
+		++i;
+	}
+
+	if (i == _sound_processors.end ()) {
+		return 0;
+	}
+
+	return *i;
+}
+
+/** @param s A sound processor from our static list.
+ *  @return Index of the sound processor with the list, or -1.
+ */
+int
+SoundProcessor::as_index (SoundProcessor const * s)
+{
+	vector<SoundProcessor*>::size_type i = 0;
+	while (i < _sound_processors.size() && _sound_processors[i] != s) {
+		++i;
+	}
+
+	if (i == _sound_processors.size ()) {
+		return -1;
+	}
+
+	return i;
+}
+
+/** @param i An index returned from as_index().
+ *  @return Corresponding sound processor.
+ */
+SoundProcessor const *
+SoundProcessor::from_index (int i)
+{
+	assert (i <= int(_sound_processors.size ()));
+	return _sound_processors[i];
+}
diff --git a/src/lib/sound_processor.h b/src/lib/sound_processor.h
new file mode 100644
index 000000000..2edf38840
--- /dev/null
+++ b/src/lib/sound_processor.h
@@ -0,0 +1,66 @@
+/*
+    Copyright (C) 2012 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
+    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,
+    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.
+
+*/
+
+/** @file src/sound_processor.h
+ *  @brief A class to describe a sound processor.
+ */
+
+#ifndef DVDOMATIC_SOUND_PROCESSOR_H
+#define DVDOMATIC_SOUND_PROCESSOR_H
+
+#include <string>
+#include <vector>
+
+/** @class SoundProcessor
+ *  @brief Class to describe a sound processor.
+ */
+class SoundProcessor
+{
+public:
+	SoundProcessor (std::string i, std::string n);
+
+	virtual float db_for_fader_change (float from, float to) const = 0;
+
+	/** @return id for our use */
+	std::string id () const {
+		return _id;
+	}
+
+	/** @return user-visible name for this sound processor */
+	std::string name () const {
+		return _name;
+	}
+	
+	static std::vector<SoundProcessor const *> all ();
+	static void setup_sound_processors ();
+	static SoundProcessor const * from_id (std::string id);
+	static SoundProcessor const * from_index (int);
+	static int as_index (SoundProcessor const *);
+
+private:
+	/** id for our use */
+	std::string _id;
+	/** user-visible name for this sound processor */
+	std::string _name;
+
+	/** sll available sound processors */
+	static std::vector<SoundProcessor const *> _sound_processors;
+};
+
+#endif
diff --git a/src/lib/util.cc b/src/lib/util.cc
index 5106f3182..1ab8c1e65 100644
--- a/src/lib/util.cc
+++ b/src/lib/util.cc
@@ -54,6 +54,7 @@ extern "C" {
 #include "filter.h"
 #include "screen.h"
 #include "film_state.h"
+#include "sound_processor.h"
 #ifndef DVDOMATIC_DISABLE_PLAYER
 #include "player_manager.h"
 #endif
@@ -386,6 +387,7 @@ dvdomatic_setup ()
 	DCPContentType::setup_dcp_content_types ();
 	Scaler::setup_scalers ();
 	Filter::setup_filters ();
+	SoundProcessor::setup_sound_processors ();
 
 #ifdef DVDOMATIC_POSIX	
 	struct sigaction sa;
diff --git a/src/lib/wscript b/src/lib/wscript
index afc916605..71a2b23f4 100644
--- a/src/lib/wscript
+++ b/src/lib/wscript
@@ -23,6 +23,7 @@ def build(bld):
                  decoder.cc
                  decoder_factory.cc
                  delay_line.cc
+                 dolby_cp750.cc
                  dvd.cc
 		 encoder.cc
                  encoder_factory.cc
@@ -46,6 +47,7 @@ def build(bld):
 		 scaler.cc
                  screen.cc
 		 server.cc
+                 sound_processor.cc
 		 thumbs_job.cc
                  tiff_decoder.cc
 	         tiff_encoder.cc