1 files changed, 81 insertions, 0 deletions
diff --git a/abs/core/tweaker/bin/twk_RAM.pl b/abs/core/tweaker/bin/twk_RAM.pl
new file mode 100755
index 0000000..2eea598
--- /dev/null
+++ b/abs/core/tweaker/bin/twk_RAM.pl
@@ -0,0 +1,81 @@
+#!/usr/bin/perl -w
+
+# Copyright 2007-2009 Robert ("Bob") Igo of StormLogic, LLC and mythic.tv.
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+use Switch;
+use Tweaker::Script;
+package Tweaker::Script;
+
+set_known_options( 'low', 'medium', 'high' );
+
+# ??? Need to make this update a class variable so it only ever needs to run once.
+sub determine_RAM_size() {
+    my $result = execute_shell_command("cat /proc/meminfo | grep MemTotal");
+    if ($result =~ m/.*MemTotal:\s*(\d+) .*/) {
+	return $1;
+    }
+    return 0;
+}
+
+# Try to implement the given option.
+sub implement_option {
+    my($option) = @_;
+
+    $dbconnectionstring = get_mythtv_connection_string();
+	
+    if (connect_to_db("DBI:mysql:$dbconnectionstring")) {
+	# MythTV's GUI allows setting this value in multiples of 4700kB.
+	# We will arbitrarily set the HDRingbufferSize to the value that is closest to
+	# 3.3% of the total RAM.
+	my $RAM_size = determine_RAM_size();
+	my $ringbuffer_size = int($RAM_size * 0.033 / 4700) * 4700;
+	change_or_make_setting('HDRingbufferSize', $ringbuffer_size) || exit -1;
+
+	# change any existing mplayer cache setting to one based on available RAM size
+	# We will arbitrarily set the cache size to 1/16 of available RAM
+	my $cachesize = int($RAM_size / 16);
+	execute_shell_command("if [[ `grep -e cache.*=.*\$ /etc/mplayer/mplayer.conf` ]]; then sed -i 's/cache.*=.*/cache=$cachesize/g' /etc/mplayer/mplayer.conf; else echo 'cache=$cachesize' >> /etc/mplayer/mplayer.conf; fi") || exit -1;
+
+	# If there's enough RAM, make mtd run by default.
+	# ??? unimplemented
+    } else {
+	exit -1;
+    }
+    disconnect_from_db();
+}
+
+# Poll the system to see what recommendationlevel the given option has on the system.
+sub poll_options {
+    my($option) = @_;
+    my $fudge_factor = .985;
+    my $low_RAM = int($fudge_factor * 512*1024);     # ~512MB
+    my $medium_RAM = int($fudge_factor * 1024*1024); # ~1GB
+    my $high_RAM = int($fudge_factor * 2048*1024);   # ~2GB
+
+    threshold_test($option, determine_RAM_size(), "RAM", $low_RAM, $medium_RAM, $high_RAM);
+}
+
+# Unimplemented in 0.7
+sub check_option {
+    help;
+}
+
+# Unimplemented in 0.7
+sub count_iterations {
+    help;
+}
+
+process_parameters;