pods::SDLx::Music(3) User Contributed Perl Documentation pods::SDLx::Music(3)NAME
SDLx::Music - A powerful, convenient interface to "SDL::Mixer::Music"
CATEGORY
Extension
SYNOPSIS
use SDL;
use SDLx::Music;
my $music = SDLx::Music->new;
#define music data with just a name and file path
$music->data(
fast => 'music/fast.ogg',
slow => 'music/slow.ogg',
magical => 'music/magic/cake.ogg',
);
#define more the long way with a parameter hash
$music->data(
squelch => {
file => 'music/squelch.ogg',
loops => 3,
fade_in => 0.5,
volume => 72,
}
splurge => {
file => 'music/splurge.ogg',
finished => sub { print 'Splurged!' },
},
);
#instead, do it the short way with the help of defaults
#clobber everything
$music->clear;
#specify the class-wide default for file extension
SDLx::Music->default->ext('.ogg');
#specify the object-wide default for file directory
$music->default->dir('music/');
#redefine squelch and splurge
$music->data(
squelch => {
#file defaults to the data name, so the path becomes
#'music/squelch.ogg', which is what we wanted
loops => 3,
fade_in => 0.5,
volume => 72,
}
splurge => {
finished => sub { print 'Splurged!' },
},
);
#and we can redefine the others like this
$music->data_for(
'fast',
'slow',
)->data(
magical => 'magic/cake',
);
#get to that named data
my $splurge = $music->data('splurge');
#and add to/modify it without clobbering existing data
$splurge
->volume(55)
->file('data/' . $splurge->file)
;
#play it once, fading in for 2 seconds
$music->play($splurge, loops => 1, fade_in => 2);
#(it will be loaded automatically and played with its specified params)
sleep 5;
#pause it
$music->pause if $music->playing;
#load everything else
$music->load;
#resume playing it at a lower volume
$music->volume(44);
$music->play;
#get the names for all music
my @names = keys %{ $music->data };
for my $name (@names) {
#play it in an infinite loop
$music->play($name, loops => 0);
warn "Cake!" if $music->playing eq "magical";
sleep 10;
}
#fade out the last song
$music->fade_out(5);
sleep 4;
die "CAKE!" if $music->fading->name eq "magical";
sleep 1;
DESCRIPTION
This class provides a powerful and convenient interface to
SDL::Mixer::Music. The main goal was to make music code neater and
clearer. Among the things that help this, this class provides class-
wide and object-wide defaults and it automatically shares duplicate use
of the same files.
The following document is intended for reference. For a more beginner-
friendly description of this class, see chapter X of the SDL Perl
Manual (when it is written).
Please note: do not mix use of this class with SDL::Mixer::Music if you
want everything to work right.
METHODS
new
SDLx::Music->new;
#Option arguments showing the default parameters
SDLx::Music->new( freq => 44100, format => SDL::Audio::AUDIO_S16SYS, channels => 2, chunksize => 4096);
Creates the new music object. Inits audio with a call to
SDLx::Mixer::init, if it isn't already (if you want more precise
control over what is initialized, make sure you call SDLx::Mixer::init
before you call this method). Creates an empty default data object for
object-wide defaults. If arguments are supplied, calls "data" with them
to set up any initial data objects. Returns the new music object.
data
$music->data;
$music->data( $name );
$music->data( $data );
$music->data( %args );
With no arguments: returns a reference to the data hash. This hash has
data names as keys and the associated data objects as values.
With a name: creates the data name if it doesn't already exist. Does
this with a call to SDLx::Music::Data-new|SDLx::Music::Data/new> with
"name =" $name> and puts that new object in the data hash under the key
of $name. Returns the data object for that name.
With a hash of arguments: for each pair, and returns a
SDLx::Music::Data. Returns $music.
data_for
$music->data_for( @names_or_data_objects );
Calls "data" repeatedly, passing it one element of the list at a time,
to initialise multiple empty names and/or add data objects. Returns
$music.
has_data
$music->has_data;
$music->has_data( $name );
$music->has_data( $data );
Without arguments: returns how many data objects the class has.
With a name: returns the data object for $name. If there is no data
object for $name it is not created and undef is returned instead.
With a data object: does a (slowish) reverse of the data hash to see if
the data object belongs to $music. Returns it or undef.
default
$music->default;
SDLx::Music->default;
Returns the default data object belonging to $music (created in "new"),
or to the class. See SDLx::Music::Data for information on how defaults
work.
load
$music->load;
$music->load( @names_or_data_objects );
SDLx::Music->load( @data_objects );
Without arguments: for every data object belonging to $music, if the
data object doesn't already have a loaded file, loads the file named by
dir, file and ext if it hasn't been loaded already. Sets the data
object's loaded parameter to this. Two or more objects that use the
same file will use the same loaded file. Reference counting is
respected, so if two data objects use the same loaded file it will be
removed from memory only after both are destroyed. Returns <$music>.
With arguments: does the same, but only for the names or data objects
in the list. If there isn't a data object for any name, it will be
created.
unload
$music->unload;
$music->unload( @names_or_data_objects );
SDLx::Music->unload( @data_objects );
Without arguments: clears the loaded parameter for all of the data
objects in $music. The loaded file is removed from memory if it loses
its last reference to it. Returns <$music>.
With arguments: does the same, but only for the names or data objects
in the list. Doesn't create a data object for a name that doesn't
exist.
clear
$music->clear;
$music->clear( @names );
Without arguments: empties $music's data hash of all of its objects.
The objects will be destroyed only if the last reference to them is
removed, and no parameters will be cleared if this is not the case.
Returns $music.
With arguments: does the same, but only deletes the values of the data
hash for the names in the list.
real_clear
$music->real_clear;
$music->real_clear( @names_or_data_objects );
SDLx::Music->real_clear( @data_objects );
The full, brute force version of "clear".
Without arguments: empties out the parameters of every data object in
$music (including "unload"ing them) and then removes them from the data
hash. This may not remove the objects from memory if there are still
remaining references to them, but it is the closest thing to it.
Returns $music.
With arguments: does the same, but only clears out the names or data
objects in the list.
play
$music_or_class->play;
$music->play( $name, $params );
$music_or_class->play( $data, %params );
Without arguments: resumes any paused music. Returns the object or
class.
With arguments: plays the sound found in $music's $name, or in $data
(depending on which is specified). "load"s it if it needs to be loaded
(which in turn creates the name if it needs to be created). The %params
are all optional and, if defined, are used instead of the values
returned by the data object's parameter methods. The accepted
parameters here are:
loops
Plays the music file "loops" times. If "loops" is 0, loops it
infinitely.
fade_in
Fades the music in for its first "fade_in" milliseconds, if
"fade_in" is defined.
vol Sets the music volume to "vol".
vol_portion
Multiplies the "vol" by "vol_portion" (values from 0 to 1 are
encouraged) before setting the volume.
pos Sets the music position to "pos" if "pos" is defined.
Returns the object or class.
pause
$music_or_class->pause;
Pauses any playing music. Returns the object or class.
stop
$music_or_class->stop;
Stops any playing music. Returns the object or class.
last_played
my $last_played = $music_or_class->last_played;
Returns the data object that was "play"ed last.
playing
my $playing = $music->playing;
If there is something playing, returns the data object that was
"play"ed last. Otherwise, returns undef.
paused
If there is something paused, returns the data object that was "play"ed
last. Otherwise, returns undef.
fading
If there is something fading, returns the data object that was "play"ed
last. Otherwise, returns undef.
volume
my $volume = $music_or_class->volume;
$music_or_class->volume( $volume );
Without arguments: returns the current music volume
With arguments: Sets the music volume to $volume. Returns the object or
class.
fade_out
$music_or_class->fade_out( $fade_out );
Fades the music out for its next "fade_in" milliseconds. Returns the
object or class.
rewind
$music_or_class->rewind;
Rewinds the music to its start. Returns the object or class.
pos
$music_or_class->pos( $pos );
Sets the music position to $pos milliseconds. It does different things
for different file types, so see SDL::Mixer::Music::set_music_position
for details. Note that this method divides $pos by 1000 to pass it to
that function, which uses seconds. Returns the object or class.
SEE ALSO
SDLx::Music::Data SDLx::Mixer SDL::Mixer::Music SDL::Mixer
AUTHORS
See "AUTHORS" in SDL.
COPYRIGHT & LICENSE
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
perl v5.18.1 2013-09-28 pods::SDLx::Music(3)
