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authorCecil Hugh Watson <knoppmyth@gmail.com>2009-09-26 01:57:08 (GMT)
committerCecil Hugh Watson <knoppmyth@gmail.com>2009-09-26 01:57:08 (GMT)
commit7b29169fff9e7c624890c5edffe85def8a293136 (patch)
tree47753889faa3a2063b66d1c7e7681e703eb1b39a /abs/core/mplayer-wrapper/mplayer-wrapper.pl
parentc491dea779dac29afff3578bf8245943817c2339 (diff)
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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="";
+ my %vdpau_supported_modes=();
+
+ # See if the GPU and driver support vdpau for GPU-based accelerated decoding
+ my $command="vdpinfo |";
+ # On supported hardware, vdpinfo produces relevant results that look something like this (see
+ # http://www.phoronix.com/forums/showthread.php?t=14493 for additional details, or run
+ # vdpinfo on vdpau-capable hardware yourself):
+ #
+ #MPEG1 0 2 4096 4096
+ #MPEG2_SIMPLE 3 2 4096 4096
+ #MPEG2_MAIN 3 2 4096 4096
+ #H264_MAIN 41 4 4096 4096
+ #H264_HIGH 41 4 4096 4096
+
+ my $grabbing_modes=0;
+ open(SHELL, $command);
+ while (<SHELL>) {
+ chop;
+ if (m/Decoder Capabilities/gi) {
+ $grabbing_modes=1;
+ #print "*** MODES START NOW"
+ } elsif (m/Output Surface/gi) {
+ $grabbing_modes=0;
+ } elsif ($grabbing_modes) {
+ if (m/[A-Z]+[0-9]+/g) {
+ s/(_.*)//g;
+ #print "*** GRABBED MODE $_\n";
+ $vdpau_supported_modes{$_} = 1;
+ }
+ }
+ }
+ close(SHELL);
+
+ # figure out what codec the video uses
+ my $command="mplayer -identify -frames 0 \"$mediafile\" | grep ID_VIDEO_CODEC | cut -c 16- |";
+ open(SHELL, $command);
+ while (<SHELL>) {
+ chop;
+ $codec = $_;
+ #print "DEBUG: codec is $codec\n";
+ }
+ close(SHELL);
+
+ # We should use vdpau if it's available and helps with the codec we need to decode.
+ if ($codec eq "ffh264") { # h.264
+ if ($vdpau_supported_modes{"H264"}) {
+ push(@parameters, "-vo vdpau");
+ push(@parameters, "-vc ffh264vdpau");
+ }
+ } elsif ($codec eq "ffmpeg2") { # MPEG2
+ if ($vdpau_supported_modes{"MPEG2"}) {
+ push(@parameters, "-vo vdpau");
+ push(@parameters, "-vc ffmpeg12vdpau");
+ }
+
+ # ??? although MPEG1 is rare, it seems as if it should work with -vc ffmpeg12vdpau as well
+
+ # problems have been reported with WMV3 support
+
+# } elsif ($codec eq "ffwmv3") { # WMV3
+# if ($vdpau_supported) {
+# push(@parameters, "-vo vdpau");
+# push(@parameters, "-vc ffwmv3vdpau");
+# }
+ # problems have been reported with WVC1 support
+
+# } elsif ($codec eq "ffvc1") { # WVC1
+# if ($vdpau_supported) {
+# push(@parameters, "-vo vdpau");
+# push(@parameters, "-vc ffvc1vdpau");
+# }
+
+ } else {
+ push(@parameters, "-vo xv,x11,");
+ push(@parameters, "-vc ,");
+ push(@parameters, "-vf pp=lb,"); # doesn't actually work with vdpau, but doesn't break anything
+ }
+ 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);
+}