constants for mixer

[sdlgit/SDL-Site.git] / pages / SDL-Mixer.html-inc

<div class="pod">
<!-- INDEX START -->
<h3 id="TOP">Index</h3>

<ul><li><a href="#NAME">NAME</a></li>
<li><a href="#CATEGORY">CATEGORY</a></li>
<li><a href="#CONSTANTS">CONSTANTS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#METHODS">METHODS</a>
<ul><li><a href="#init">init</a></li>
<li><a href="#quit">quit</a></li>
<li><a href="#linked_version">linked_version</a></li>
<li><a href="#open_audio">open_audio</a></li>
<li><a href="#close_audio">close_audio</a></li>
<li><a href="#query_spec">query_spec</a></li>
</ul>
</li>
<li><a href="#AUTHORS">AUTHORS </a></li>
<li><a href="#SEE_ALSO">SEE ALSO</a>
</li>
</ul><hr />
<!-- INDEX END -->

<h1 id="NAME">NAME</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="NAME_CONTENT">
<p>SDL::Mixer - Sound and music functions</p>

</div>
<h1 id="CATEGORY">CATEGORY</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="CATEGORY_CONTENT">
<p>Mixer</p>

</div>
<h1 id="CONSTANTS">CONSTANTS</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="CONSTANTS_CONTENT">
<p>The constants are not exported by default. You can export them into your namespace by doing:</p>
<pre> use SDL::Mixer ':all';

</pre>
<p>or access them directly:</p>
<pre> SDL::Mixer::MIX_DEFAULT_FREQUENCY;

</pre>
<p>or by choosing the export tags below:</p>
<p>Export tag: ':init'</p>
<pre> MIX_INIT_FLAC
 MIX_INIT_MOD
 MIX_INIT_MP3
 MIX_INIT_OGG

</pre>
<p>Export tag: ':default'</p>
<pre> MIX_CHANNELS
 MIX_DEFAULT_FORMAT
 MIX_DEFAULT_FREQUENCY
 MIX_DEFAULT_CHANNELS
 MIX_MAX_VOLUME
 MIX_CHANNEL_POST

</pre>
<p>Export tag: ':fading'</p>
<pre> MIX_NO_FADING
 MIX_FADING_OUT
 MIX_FADING_IN

</pre>
<p>Export tag: ':type'</p>
<pre> MUS_NONE
 MUS_CMD
 MUS_WAV
 MUS_MOD
 MUS_MID
 MUS_OGG
 MUS_MP3
 MUS_MP3_MAD
 MUS_MP3_FLAC

</pre>

</div>
<h1 id="DESCRIPTION">DESCRIPTION</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="DESCRIPTION_CONTENT">
<p>SDL::Mixer allows you to enable sound, alter music volume settings, and lets you play, pause and resume, as well as fading the sound and music 
in and out.</p>

</div>
<h1 id="METHODS">METHODS</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="METHODS_CONTENT">

</div>
<h2 id="init">init</h2>
<div id="init_CONTENT">
<pre> my $init_flags = SDL::Mixer::init( $flags );

</pre>
<p>Loads dynamic libraries and prepares them for use. Flags should be one or more flags from init flags OR'd together.
It returns the flags successfully initialized, or 0 on failure.</p>
<p>Example:</p>
<pre> use SDL::Mixer;

 my $init_flags = SDL::Mixer::init( MIX_INIT_MP3 | MIX_INIT_MOD | MIX_INIT_FLAC | MIX_INIT_OGG );

 print(&quot;We have MP3 support!\n&quot;)  if $init_flags &amp; MIX_INIT_MP3;
 print(&quot;We have MOD support!\n&quot;)  if $init_flags &amp; MIX_INIT_MOD;
 print(&quot;We have FLAC support!\n&quot;) if $init_flags &amp; MIX_INIT_FLAC;
 print(&quot;We have OGG support!\n&quot;)  if $init_flags &amp; MIX_INIT_OGG;

</pre>
<p>Flags:</p>
<ul>
		<li>MIX_INIT_MP3	</li>
		<li>MIX_INIT_MOD	</li>
		<li>MIX_INIT_FLAC	</li>
		<li>MIX_INIT_OGG</li>
</ul>

<p><strong>Note</strong>: Only available for SDL_mixer &gt;= 1.2.10</p>

</div>
<h2 id="quit">quit</h2>
<div id="quit_CONTENT">
<pre> SDL::Mixer::quit();

</pre>
<p>This function unloads the liraries previously loaded with <a href="#init">init()</a>.</p>
<p><strong>Note</strong>: Only available for SDL_mixer &gt;= 1.2.10</p>

</div>
<h2 id="linked_version">linked_version</h2>
<div id="linked_version_CONTENT">
<pre> $version = SDL::Mixer::linked_version();

</pre>
<p><code>linked_version</code> gives you the major-, minor-, and patchlevel for SDL_mixer. This way you can check if e.g. <a href="#init">init()</a> and <a href="#quit">quit()</a> 
are available.</p>
<p>Example:</p>
<pre> use SDL::Mixer;
 use SDL::Version;

 my $version = SDL::Mixer::linked_version();

 printf(&quot;%d.%d.%d\n&quot;, $version-&gt;major, $version-&gt;minor, $version-&gt;patch); # prints &quot;1.2.8&quot; for me

</pre>

</div>
<h2 id="open_audio">open_audio</h2>
<div id="open_audio_CONTENT">
<pre> my $audio_opened = SDL::Mixer::open_audio( $frequency, $format, $channels, $chunksize );

</pre>
<p><code>open_audio</code> will initialize SDL_mixer if it is not yet initialized, see note. SDL_mixer may not be able to provide the exact specifications 
your provided, however it will automatically translate between the expected format and the real one. You can retrieve the real format using 
<a href="http://search.cpan.org/perldoc?query_spec">query_spec</a>. </p>
<p>Returns 0 on success, -1 on error.</p>
<p><strong>Note</strong>: You must not use <code>AUDIO_S16</code>, <code>AUDIO_U16</code>, <code>AUDIO_S16LSB</code>, or <code>AUDIO_U16LSB.</code> They are not portable, and SDL will not return an 
error code when they fail. The result will be a horrible staticy noise. You can usually use <code>AUDIO_S16SYS</code>, though not always. Future versions 
of SDL should take this parameter only as a hint, then read back the value that the OS (for example, OSS or ALSA) has chosen to use in case the 
desired audio type is not supported. </p>
<p><strong>Note</strong>: When already initialized, this function will not re-initialize SDL_mixer, nor fail. It will merely increment the number of times 
<a href="/SDL-Mixer.html#close_audio">SDL::Mixer::close_audio</a> must be called to actually get it to uninitialize. This serves as a very simplistic method for multiple application 
components to use SDL_mixer without necessitating a great deal of inter-component awareness. Be warned however that in such a situation, the 
latest components to initialize SDL_mixer will probably not get the SDL_mixer settings they're expecting. </p>
<p>Example:</p>
<pre> use SDL;
 use SDL::Mixer;

 printf(&quot;Error initializing SDL_mixer: %s\n&quot;, SDL::get_error()) unless SDL::Mixer::open_audio(44100, AUDIO_S16, 2, 1024) == 0;

</pre>

</div>
<h2 id="close_audio">close_audio</h2>
<div id="close_audio_CONTENT">
<pre> SDL::Mixer::close_audio();

</pre>
<p>Close the mixer and halting all playing audio. This function does not return anything.</p>

</div>
<h2 id="query_spec">query_spec</h2>
<div id="query_spec_CONTENT">
<pre> my @query_spec = @{ SDL::Mixer::query_spec() };

</pre>
<p>Find out what the actual audio device parameters are.
This function returns 1 as first array element (status) if the audio has been opened, 0 otherwise.</p>
<p>Example:</p>
<pre> use SDL::Mixer;

 my ($status, $freq, $format, $channels) = @{ SDL::Mixer::query_spec() };

 printf(&quot;%s, %s, %s, %s\n&quot;, $status, $freq, $format, $channels);

</pre>

</div>
<h1 id="AUTHORS">AUTHORS </h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="AUTHORS_CONTENT">
<p>Tobias Leich [FROGGS]</p>

</div>
<h1 id="SEE_ALSO">SEE ALSO</h1><p><a href="#TOP" class="toplink">Top</a></p>
<div id="SEE_ALSO_CONTENT">
<p><a href="http://search.cpan.org/perldoc?perl">perl</a>, <a href="SDL-Mixer-Channels.html">SDL::Mixer::Channels</a>, <a href="SDL-Mixer-Effects.html">SDL::Mixer::Effects</a>, <a href="SDL-Mixer-Groups.html">SDL::Mixer::Groups</a>, <a href="SDL-Mixer-Music.html">SDL::Mixer::Music</a>.</p>

</div>
</div>