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|
#!/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();
# mplayer evaluates configuration options in the following order, with
# later-evaluated options overriding earlier-evaluated ones, both within
# a given configuration location and between them:
# 1) system-wide configuration/profiles, /etc/mplayer/mplayer.conf
# 2) user-specific configuration/profiles, ~/.mplayer/config
# 3) commandline configuration parameters
# 4) file-specific configuration, ~/.mplayer/[filename].conf
# 5) any nonstandard configuration file, included via "-include" parameter
#
# This script's dynamic configuration options fall in at 2.5 above,
# so commandline options, file-specific configuration options,
# or a nonstandard configuration file will override the options that
# the script creates, but system-wide and user-specific configuration
# will be overridden by the dynamic configuration options.
#
# This is sub-optimal, as the easiest way for a user to compensate for
# a misfiring configuration rule would be to override it in a configuration
# file. Instead, they will have to change the way they run this script.
my $player_parameters = join(' ',
&dynamic_parameters($mediafile),
&translate_parameters($player,@ARGV[0..$#ARGV-1]));
&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($_), @parameters);
} else {
# currently, all other players used by this wrapper work with mplayer parameters
return @parameters;
}
}
# Returns an array of dynamic parameters based on the media type,
# the presence of special playback decoding hardware, and the
# general capability of the CPU.
sub dynamic_parameters () {
my($mediafile)=@_;
my @parameters = ();
my $codec="";
# figure out what codec the video uses
my $command="mplayer -identify -vo null -frames 0 \"$mediafile\" | grep ID_VIDEO_CODEC | cut -c 16- |";
open(SHELL, $command);
while (<SHELL>) {
chop;
$codec = $_;
#print "DEBUG: codec is $codec\n";
}
close(SHELL);
# We should use vdpau if it's available and helps with the codec we need to decode.
# ??? NOTE: At the moment, vdpau capability is assumed, not verified.
if ($codec eq "ffh264") { # h.264
push(@parameters, "-vo vdpau");
push(@parameters, "-vc ffh264vdpau");
} elsif ($codec eq "ffmpeg2") { # MPEG2
push(@parameters, "-vo vdpau");
push(@parameters, "-vc ffmpeg12vdpau");
# problems have been reported with WMV3 support
# } elsif ($codec eq "ffwmv3") { # WMV3
# push(@parameters, "-vo vdpau");
# push(@parameters, "-vc ffwmv3vdpau");
# problems have been reported with WVC1 support
# } elsif ($codec eq "ffvc1") { # WVC1
# push(@parameters, "-vo vdpau");
# push(@parameters, "-vc ffvc1vdpau");
} else {
push(@parameters, "-vo xv,x11,");
push(@parameters, "-vc ,");
push(@parameters, "-vf pp=lb,");
}
return(@parameters);
}
# 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 @possible_players = ("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 |";
print "DEBUG: $0's player command is: *** $command ***\n";
open(SHELL, $command);
while (<SHELL>) {
print $_;
}
close(SHELL);
}
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