Preliminary mplayer wrapper; basic functionality only

3 files changed, 314 insertions, 0 deletions

diff --git a/abs/core-testing/mplayer-wrapper/PKGBUILD b/abs/core-testing/mplayer-wrapper/PKGBUILD
new file mode 100644
index 0000000..82f1082
--- /dev/null
+++ b/abs/core-testing/mplayer-wrapper/PKGBUILD
@@ -0,0 +1,16 @@
+pkgname=mplayer-wrapper
+pkgver=1
+pkgrel=1
+pkgdesc="wrapper for mplayer and mplayer derivatives"
+arch=('i686' 'x86_64')
+
+depends=('perl') 
+
+source=(mplayer-wrapper.pl)
+
+license=('GPL2')
+
+build() {
+   cd $startdir
+   install -m0777 -D bin/*  $startdir/pkg/usr/LH/bin/
+}
diff --git a/abs/core-testing/mplayer-wrapper/bin/mplayer-resumer.pl b/abs/core-testing/mplayer-wrapper/bin/mplayer-resumer.pl
new file mode 100755
index 0000000..c785a25
--- /dev/null
+++ b/abs/core-testing/mplayer-wrapper/bin/mplayer-resumer.pl
@@ -0,0 +1,188 @@
+#!/usr/bin/perl
+
+use Shell;
+use strict;
+use POSIX qw(floor);
+
+# Written by Bob Igo from the MythTV Store at http://MythiC.TV
+# Email: bob@stormlogic.com
+#
+# If you run into problems with this script, please send me email
+
+# PURPOSE:
+# --------------------------
+# This is a wrapper script to prove the concept of having MythTV
+# resume playback of previously-stopped video where you left off.
+# It's likely that a good solution will look different than this
+# initial code.
+
+# RATIONALE:
+# --------------------------
+# Watching 90% of a video and stopping causes you to return to the
+# beginning again the next time you watch it.  Remembering where
+# you were in the video and resuming at that position is a much nicer
+# behavior for the user.
+#
+# By default, mplayer spits out timecode information that tells you
+# where you are in the video, to the tenth of a second.  Mplayer also
+# supports a seek feature on the command-line.  We can make use of these
+# features to write an mplayer wrapper that will remember the last
+# position in a video file and resume to it on playback.
+
+# PARAMETERS:
+# --------------------------
+# see print_usage() below
+
+# FILES:
+# --------------------------
+# $infile, the video to play
+# $resumefile, the video's resume file (see get_resume_filename() below)
+
+# KNOWN ISSUES:
+# --------------------------
+# Mplayer misreports the timecodes on .nuv MPEG-2 files.  Currently, anything
+# captured via an HDTV tuner card and put into your /myth/video directory
+# will fail with this resumer.
+#
+# Current theories include the timecode having to do with the show's broadcast
+# time, recording time, or perhaps its upload time to the station that
+# broadcast it.
+
+# DESIGN LIMITATION:
+# -------------------------
+# If the video file to be played is on a read-only filesystem, or otherwise
+# lives in a location that cannot be written to, resume will fail.  This is
+# because the current implementation uses a file parallel to the video file
+# to store the timecode.
+#
+
+# CHANGE LOG:
+# 5/3/2006
+# Added last time started checking.
+# If this script is restarted within $tdiff (default 5 seconds)
+# then it will delete the file used to keep track of the videos
+# resume position.
+
+
+my $infile;
+my $resumefile;
+my $mplayer_parameters;
+my $fudge_factor=2; # number of additional seconds to skip back before playback
+my $tnow;    # Time now.
+my $tprev;   # Time the prog was last started. 
+             # Returned from the modification time of the xx.resume file.
+my $tdiff=5; # How many seconds before we should start from 
+             # the beginning of the movie
+#DEBUG
+#open(DEBUG,">/tmp/debug") || die "unable to open debug file";
+
+sub init () {
+    $tnow = time();
+    $infile = @ARGV[$#ARGV];
+
+    $resumefile = &get_resume_filename($infile);
+    # This returns the 9th element of the 13 element array 
+    # created by the stat function.
+    $tprev = (stat ($resumefile))[9]; 
+    # if this file is restarted in less than 5 seconds then 
+    # remove the .resume file
+    if ( ($tnow - $tprev) < $tdiff ) {
+        unlink($resumefile);
+    }
+
+    $mplayer_parameters = join(' ',@ARGV[0..$#ARGV-1]);
+}
+
+&init();
+&save_time_offset(&mplayer($mplayer_parameters,$infile), $resumefile);
+
+#close(DEBUG);
+
+# For $pathname, return $path.$filename.resume
+sub get_resume_filename () {
+    my($pathname)=@_;
+    
+    my $idx = rindex($pathname,"/");
+
+    if ($idx == -1) { # There was no "/" in $pathname
+	return ".".$pathname.".resume";
+    } else {
+	# Now we need to split out the path from the filename.
+	my $path = substr($pathname,0,$idx+1);
+	my $filename = substr($pathname,$idx+1);
+	return "$path.$filename.resume";
+    }
+}
+
+# Calls mplayer and returns the last known video position
+sub mplayer () {
+    my($parameters,$infile)=@_;
+    my $seconds=0;
+    my $timecode=&get_time_offset($infile);
+    my $command = "mplayer $parameters -ss $timecode \"$infile\" 2>&1 2>/dev/null |";
+
+    open(SHELL, $command);
+    # The kind of line we care about looks like this example:
+    # A:1215.2 V:1215.2 A-V:  0.006 ct:  0.210 207/201 13%  0%  1.9% 0 0 68%
+    # But all we care to look at is the first number.
+    
+    while (<SHELL>) {
+	#print DEBUG $_;
+	if (m/A: *[0-9]+\.[0-9]/) { # See if this line has timecodes on it
+	    my $last_timecode_line = &extract_last_timecode_line($_);
+	    if ($last_timecode_line =~ m/ *([0-9]+\.[0-9]) V/) {
+		$seconds=$1;
+	    }
+	}
+    }
+    close(SHELL);
+
+    return $seconds;
+
+    sub extract_last_timecode_line () {
+	my ($line)=@_;
+	my @lines=split('A:',$line);
+	return @lines[$#lines-1];
+    }
+}
+
+# Save the last known video position
+sub save_time_offset () {
+    my($seconds, $resumefile)=@_;
+
+    open(RESUMEFILE, ">$resumefile") || die "Unable to open $resumefile for writing";
+    print RESUMEFILE "$seconds";
+    close(RESUMEFILE);
+}
+
+# returns the number of seconds corresponding to the last known video position,
+# in hh:mm:ss format, compatible with the "-ss" parameter to mplayer
+sub get_time_offset () {
+    my($videofile)=@_;
+    my($resumefile) = &get_resume_filename($videofile);
+    my $seconds=0;
+    my $timecode;
+
+    open(RESUMEFILE, "<$resumefile") || return "00:00:00";
+    while(<RESUMEFILE>) {
+	$seconds=$_;
+    }
+    close(RESUMEFILE);
+
+    my $hours = floor($seconds/3600);
+    $seconds = $seconds - $hours*3600;
+
+    my $minutes = floor($seconds/60);
+    $seconds = int($seconds - $minutes*60) - $fudge_factor;
+
+    $timecode = sprintf "%02d:%02d:%02d",$hours,$minutes,$seconds;
+#    print "TIMECODE: $timecode\n";
+    return $timecode;
+}
+
+sub print_usage () {
+    print "USAGE:\n";
+    print "\t",$ARGV[0], "[mplayer parameters] video_file\n";
+    print "\t","e.g. ",$ARGV[0], "-fs -zoom my.mpg\n";
+    print "\t","Version 5/3/2006\n";
+}
diff --git a/abs/core-testing/mplayer-wrapper/bin/mplayer-wrapper.pl b/abs/core-testing/mplayer-wrapper/bin/mplayer-wrapper.pl
new file mode 100755
index 0000000..583786d
--- /dev/null
+++ b/abs/core-testing/mplayer-wrapper/bin/mplayer-wrapper.pl
@@ -0,0 +1,110 @@
+#!/usr/bin/perl
+
+use Shell;
+use strict;
+use POSIX qw(floor);
+
+# Written by Bob Igo from the MythTV Store at http://MythiC.TV
+# including some original code and contributions from Nick C.
+# and graysky.
+# Email: bob@stormlogic.com
+#
+# If you run into problems with this script, please send me email
+
+# PURPOSE:
+# --------------------------
+# This is a wrapper script that tries to find the best parameters
+# for calling an underlying video player.  The outer layer determines
+# the best playback parameters, while the inner layer picks the best
+# player to call.
+
+# RATIONALE:
+# --------------------------
+# Default video playback options are not optimal on all hardware or
+# for all video types.  In addition, common video players do not
+# offer to bookmark video so that you can resume where you left off.
+# Both of these problems can be addressed by this wrapper.
+
+# PARAMETERS:
+# --------------------------
+# The same parameters you'd use for mplayer, some of which may be
+# translated automatically for use with smplayer.
+
+# FILES:
+# --------------------------
+# $mediafile, the file to play
+
+sub run () {
+    my $mediafile = @ARGV[$#ARGV];
+    my $player = &pick_player();
+
+    my $player_parameters = join(' ',
+				 &translate_parameters($player,@ARGV[0..$#ARGV-1]),
+				 &dynamic_parameters($mediafile));
+    &player($player,$player_parameters,$mediafile);
+}
+
+&run();
+
+# Translates any parameters into ones that will be compatible with the given player.
+sub translate_parameters() {
+    my($player,@parameters)=@_;
+
+    if ($player eq "smplayer") {
+	# Stupidly, smplayer uses a different set of command-line parameters than generic
+	# mplayer, so we need to translate mplayer-centric ones into the few that are
+	# available in smplayer-ese.
+	my %smplayer_parameter_translation_array = (
+	    "-fs" => "-fullscreen",
+	    "-zoom" => " "
+	    );
+	
+	sub translate() {
+	    my($flag)=@_;
+	    return $smplayer_parameter_translation_array{$flag};
+	}
+	
+	return map(&translate($_), @parameters);
+    } else {
+	return @parameters;
+    }
+}
+
+# Returns an array of dynamic parameters based in part on the media.
+sub dynamic_parameters () {
+    my($mediafile)=@_;
+    return(); # ??? empty for now; further development required
+}
+
+# Find the best player for use on this system.  The script prefers smplayer,
+# which has built-in bookmarking, falling back to mplayer-resumer.pl, which
+# implements bookmarking as an mplayer wrapper, if smplayer cannot be found.
+# Finally, if no bookmarking players can be found, a barebones mplayer is used.
+sub pick_player () {
+    my @possible_players = ("smplayer", "mplayer-resumer.pl", "mplayer");
+    my $command;
+    my $candidate_player;
+    foreach (@possible_players) {
+	$candidate_player = $_;
+	$command = "which $candidate_player |";
+	open(SHELL, $command);
+	if (<SHELL>) {
+	    #print "player $candidate_player : $_\n";
+	    return $candidate_player;
+	}
+	close(SHELL);
+    }
+}
+
+# Calls player
+sub player () {
+    my($player,$parameters,$mediafile)=@_;
+    my $command = "$player $parameters \"$mediafile\" 2>&1 2>/dev/null |";
+
+    #print "DEBUG: command is:\n$command\n";
+    open(SHELL, $command);
+    while (<SHELL>) {
+	print $_;
+    }
+    close(SHELL);
+}