Version 0.01

HTML/EN/plugins/BS2B/settings/player.html

@@ -0,0 +1,12 @@
+[% PROCESS settings/header.html %]
+
+[% WRAPPER settingSection %]
+
+	[% WRAPPER setting title="Enable BS2B" desc="" %]
+		<input name="pref_bs2b" id="pref_bs2b" type="checkbox" [% IF prefs.pref_bs2b %] checked [% END %]>
+		<label for="pref_bs2b">[% "PLUGIN_BS2B_ENABLE" | string %]</label>
+	[% END %]
+
+[% END %]
+
+[% PROCESS settings/footer.html %]

PlayerSettings.pm

@@ -0,0 +1,47 @@
+package Plugins::BS2B::PlayerSettings;
+
+use strict;
+
+use base qw(Slim::Web::Settings);
+
+use Slim::Utils::Prefs;
+use Slim::Utils::Log;
+use Slim::Player::CapabilitiesHelper;
+
+use Plugins::BS2B::Plugin;
+
+my $prefs = preferences('plugin.bs2b');
+my $log   = logger('plugin.bs2b');
+
+sub getDisplayName {
+    return 'PLUGIN_BS2B';
+}
+
+sub needsClient {
+    return 1;
+}
+
+sub name {
+    return Slim::Web::HTTP::CSRF->protectName('PLUGIN_BS2B');
+}
+
+sub page {
+    return Slim::Web::HTTP::CSRF->protectURI('plugins/BS2B/settings/player.html');
+}
+
+sub handler {
+    my ($class, $client, $params, $callback, @args) = @_;
+
+    if ($params->{'saveSettings'}) {
+
+		$prefs->client($client)->set('bs2b', $params->{'pref_bs2b'} || 0);
+
+		Plugins::BS2B::Plugin::setupTranscoder($client);
+    }
+
+	$params->{'prefs'}->{'pref_bs2b'}= $prefs->client($client)->get('bs2b') || 0;
+
+    return $class->SUPER::handler($client, $params);
+}
+
+1;

Plugin.pm

@@ -0,0 +1,59 @@
+package Plugins::BS2B::Plugin;
+
+use strict;
+
+use base qw(Slim::Plugin::OPMLBased);
+
+use Slim::Utils::Log;
+use Slim::Utils::Prefs;
+use Slim::Player::TranscodingHelper;
+
+use Plugins::BS2B::PlayerSettings;
+
+my $prefs = preferences('plugin.bs2b');
+
+my $log = Slim::Utils::Log->addLogCategory({
+	'category'     => 'plugin.bs2b',
+	'defaultLevel' => 'WARN',
+	'description'  => 'PLUGIN_BS2B',
+});
+
+sub initPlugin {
+	my $class = shift;
+
+	Plugins::BS2B::PlayerSettings->new;
+
+	Slim::Control::Request::subscribe(\&initClient, [['client'],['new','reconnect']]);
+}
+
+sub setupTranscoder {
+    my $client = $_[0] || return;
+
+	my $usebs2b   = $prefs->client($client)->get('bs2b');
+
+	my $flc = 'flc-flc-*-' . lc($client->macaddress);
+
+	if ($usebs2b) {
+
+		# AU is specifically designed to be written to a pipe (http://www.mega-nerd.com/libsndfile/FAQ.html#Q017) 
+		my $cmdTable    = '[sox] -q -t flac $FILE$ -t au - $START$ | [bs2bconvert] /dev/stdin /dev/stdout | [sox] -q -t au - -t flac -C 0 -';
+		my $capabilities = { F => 'noArgs', T => 'START=trim %s' };
+
+		$Slim::Player::TranscodingHelper::commandTable{ $flc } = $cmdTable;
+		$Slim::Player::TranscodingHelper::capabilities{ $flc } = $capabilities;
+
+	} else {
+
+		$Slim::Player::TranscodingHelper::commandTable{ $flc } = "-";
+		$Slim::Player::TranscodingHelper::capabilities{ $flc } = {};
+
+	}		
+}
+
+sub initClient {
+    my $request = shift;
+
+    setupTranscoder($request->client());
+}
+
+1;

install.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<extension>
+  <name>PLUGIN_BS2B</name>
+  <module>Plugins::BS2B::Plugin</module>
+  <version>0.01</version>
+  <description>PLUGIN_BS2B_DESC</description>
+  <creator>Terual</creator>
+  <homepageURL>https://github.com/terual/BS2B</homepageURL>
+  <defaultState>enabled</defaultState>
+  <type>2</type>
+  <!-- type=extension -->
+  <targetApplication>
+    <id>SlimServer</id>
+    <minVersion>7.9</minVersion>
+    <maxVersion>8.*</maxVersion>
+  </targetApplication>
+</extension>

src/Dockerfile

@@ -0,0 +1,6 @@
+FROM ubuntu:14.04
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get -y update && apt-get -y upgrade && \
+	apt-get install -y gcc g++ make libsndfile-dev build-essential
+

src/build.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+docker build . -t bs2b
+
+rm -rf "libbs2b-3.1.0"
+tar -xvf "libbs2b-3.1.0.tar.bz2"
+patch -p0 < fix-stderr.patch
+
+cd "libbs2b-3.1.0"
+docker run -t --rm -u "${UID}" -v "${PWD}:${PWD}" -w "${PWD}" \
+	bs2b \
+	sh -c "./configure --help && LIBS=-lm ./configure --enable-static --disable-shared && make"
+
+

src/fix-stderr.patch

@@ -0,0 +1,76 @@
+--- libbs2b-3.1.0/src/bs2bconvert.c.orig	2009-06-04 20:01:15.000000000 +0200
++++ libbs2b-3.1.0/src/bs2bconvert.c	2020-10-05 15:00:34.332595456 +0200
+@@ -146,20 +146,20 @@
+
+ 	if( strcmp( infilename, outfilename ) == 0 )
+ 	{
+-		printf( "Error : Input and output filenames are the same.\n\n" );
++		fprintf( stderr, "Error : Input and output filenames are the same.\n\n" );
+ 		return 1;
+ 	}
+
+ 	if( ( infile = sf_open( infilename, SFM_READ, &sfinfo ) ) == NULL )
+ 	{
+-		printf( "Not able to open input file %s.\n", infilename );
+-		printf( sf_strerror( NULL ) );
++		fprintf( stderr, "Not able to open input file %s.\n", infilename );
++		fprintf( stderr, sf_strerror( NULL ) );
+ 		return 1;
+ 	}
+
+ 	if( sfinfo.channels != 2 )
+ 	{
+-		printf( "Input file is not a stereo.\n" );
++		fprintf( stderr, "Input file is not a stereo.\n" );
+ 		sf_close( infile );
+ 		return 1;
+ 	}
+@@ -168,7 +168,7 @@
+
+ 	if( srate < BS2B_MINSRATE || srate > BS2B_MAXSRATE )
+ 	{
+-		printf( "Not supported sample rate '%d'.\n", srate );
++		fprintf( stderr, "Not supported sample rate '%d'.\n", srate );
+ 		sf_close( infile );
+ 		return 1;
+ 	}
+@@ -176,7 +176,7 @@
+ 	/* Open the output file. */
+ 	if( ( outfile = sf_open( outfilename, SFM_WRITE, &sfinfo ) ) == NULL )
+ 	{
+-		printf( "Not able to open output file %s : %s\n",
++		fprintf( stderr, "Not able to open output file %s : %s\n",
+ 			outfilename, sf_strerror( NULL ) );
+ 		sf_close( infile );
+ 		return 1;
+@@ -184,7 +184,7 @@
+
+ 	if( NULL == ( bs2bdp = bs2b_open() ) )
+ 	{
+-		printf( "Not able to allocate data\n" );
++		fprintf( stderr, "Not able to allocate data\n" );
+ 		sf_close( infile );
+ 		sf_close( outfile );
+ 		return 1;
+@@ -193,10 +193,10 @@
+ 	bs2b_set_srate( bs2bdp, srate );
+ 	bs2b_set_level( bs2bdp, level );
+
+-	printf( "Crossfeed level: %.1f dB, %d Hz, %d us.\n",
++	fprintf( stderr, "Crossfeed level: %.1f dB, %d Hz, %d us.\n",
+ 		( double )bs2b_get_level_feed( bs2bdp ) / 10.0,
+ 		bs2b_get_level_fcut( bs2bdp ), bs2b_get_level_delay( bs2bdp ) );
+-	printf( "Converting file '%s' to file '%s'\nsample rate = %u...",
++	fprintf( stderr, "Converting file '%s' to file '%s'\nsample rate = %u...",
+ 		infilename, outfilename, bs2b_get_srate( bs2bdp ) );
+
+ 	copy_metadata( outfile, infile );
+@@ -209,7 +209,7 @@
+ 	sf_close( infile );
+ 	sf_close( outfile );
+
+-	printf( " Done.\n" );
++	fprintf( stderr, " Done.\n" );
+
+ 	return 0;
+ } /* main() */

strings.txt

@@ -0,0 +1,10 @@
+# String file for BS2B plugin
+
+PLUGIN_BS2B
+	EN	Bauer stereophonic-to-binaural DSP
+
+PLUGIN_BS2B_DESC
+	EN	Bauer stereophonic-to-binaural DSP: headphone filter
+
+PLUGIN_BS2B_ENABLE
+	EN	Enable Bauer stereophonic-to-binaural DSP for this player