#!/usr/bin/perl use strict; use warnings; use Glib qw(TRUE FALSE filename_to_unicode); use GStreamer; # $Id: typefind.pl 29 2005-12-03 00:28:13Z tsch $ sub my_bus_callback { my ($bus, $message, $loop) = @_; if ($message -> type & "error") { warn $message -> error; $loop -> quit(); } elsif ($message -> type & "eos") { $loop -> quit(); } # remove message from the queue return TRUE; } sub idle_exit_loop { my ($loop) = @_; $loop -> quit(); # once return FALSE; } sub cb_typefound { my ($typefind, $probability, $caps, $loop) = @_; my $type = $caps -> to_string(); print "Media type $type found, probability $probability%\n"; # since we connect to a signal in the pipeline thread context, we need # to set an idle handler to exit the main loop in the mainloop context. # Normally, your app should not need to worry about such things. Glib::Idle -> add(\&idle_exit_loop, $loop); } GStreamer -> init(); my $loop = Glib::MainLoop -> new(undef, FALSE); # check args unless ($#ARGV == 0) { print "Usage: $0 <filename>\n"; exit -1; } # create a new pipeline to hold the elements my $pipeline = GStreamer::Pipeline -> new("pipe"); $pipeline -> get_bus() -> add_watch(\&my_bus_callback, $loop); # create file source and typefind element my ($filesrc, $typefind) = GStreamer::ElementFactory -> make(filesrc => "source", typefind => "typefinder"); $filesrc -> set(location => filename_to_unicode $ARGV[0]); $typefind -> signal_connect(have_type => \&cb_typefound, $loop); # setup $pipeline -> add($filesrc, $typefind); $filesrc -> link($typefind); $pipeline -> set_state("playing"); $loop -> run(); # unset $pipeline -> set_state("null");