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<title>src/Sound/SFML.hs</title>
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<pre><a name="line-1"></a>
<a name="line-2"></a><span class='hs-comment'>-- High level api for playing sounds (and background music)</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Sound</span><span class='hs-varop'>.</span><span class='hs-conid'>SFML</span> <span class='hs-layout'>(</span>
<a name="line-5"></a>    <span class='hs-conid'>PolySound</span><span class='hs-layout'>,</span>
<a name="line-6"></a>    <span class='hs-varid'>newPolySound</span><span class='hs-layout'>,</span>
<a name="line-7"></a>    <span class='hs-varid'>freePolySound</span><span class='hs-layout'>,</span>
<a name="line-8"></a>    <span class='hs-varid'>triggerPolySound</span><span class='hs-layout'>,</span>
<a name="line-9"></a>  <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-10"></a>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Sound</span><span class='hs-varop'>.</span><span class='hs-conid'>SFML</span><span class='hs-varop'>.</span><span class='hs-conid'>LowLevel</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-comment'>-- * Sounds</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-comment'>-- | A PolySound allows you to trigger one sound multiple times (the sounds overlap)</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="PolySound"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PolySound</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PolySound</span> <span class='hs-conid'>FilePath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>SoundBuffer</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Sound</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-conid'>IORef</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>PolySound</span> <span class='hs-keyword'>where</span>
<a name="line-27"></a>    <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>PolySound</span> <span class='hs-varid'>file</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"PolySound "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>file</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="newPolySound"></a><span class='hs-definition'>newPolySound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>PolySound</span>
<a name="line-30"></a><span class='hs-definition'>newPolySound</span> <span class='hs-varid'>path</span> <span class='hs-varid'>numberOfVoices</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-31"></a>    <span class='hs-varid'>buffer</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>sfSoundBuffer_CreateFromFile</span> <span class='hs-varid'>path</span>
<a name="line-32"></a>    <span class='hs-varid'>sounds</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>forM</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>1</span> <span class='hs-keyglyph'>..</span> <span class='hs-varid'>numberOfVoices</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span>
<a name="line-33"></a>        <span class='hs-varid'>sound</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>sfSound_Create</span>
<a name="line-34"></a>        <span class='hs-varid'>sfSound_SetBuffer</span> <span class='hs-varid'>sound</span> <span class='hs-varid'>buffer</span>
<a name="line-35"></a>        <span class='hs-varid'>return</span> <span class='hs-varid'>sound</span>
<a name="line-36"></a>    <span class='hs-varid'>ref</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>newIORef</span> <span class='hs-num'>0</span>
<a name="line-37"></a>    <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>PolySound</span> <span class='hs-varid'>path</span> <span class='hs-varid'>buffer</span> <span class='hs-varid'>sounds</span> <span class='hs-varid'>ref</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="freePolySound"></a><span class='hs-definition'>freePolySound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PolySound</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-40"></a><span class='hs-definition'>freePolySound</span> <span class='hs-layout'>(</span><span class='hs-conid'>PolySound</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>buffer</span> <span class='hs-varid'>sounds</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-41"></a>    <span class='hs-varid'>sfSoundBuffer_Destroy</span> <span class='hs-varid'>buffer</span>
<a name="line-42"></a>    <span class='hs-varid'>mapM_</span> <span class='hs-varid'>sfSound_Destroy</span> <span class='hs-varid'>sounds</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="triggerPolySound"></a><span class='hs-definition'>triggerPolySound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PolySound</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-45"></a><span class='hs-definition'>triggerPolySound</span> <span class='hs-layout'>(</span><span class='hs-conid'>PolySound</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>sounds</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-46"></a>    <span class='hs-varid'>i</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-47"></a>    <span class='hs-keyword'>let</span> <span class='hs-varid'>i'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mod`</span> <span class='hs-varid'>length</span> <span class='hs-varid'>sounds</span>
<a name="line-48"></a>    <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>ref</span> <span class='hs-varid'>i'</span>
<a name="line-49"></a>    <span class='hs-varid'>sfSound_Play</span> <span class='hs-layout'>(</span><span class='hs-varid'>sounds</span> <span class='hs-varop'>!!</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-50"></a>
<a name="line-51"></a>
<a name="line-52"></a><span class='hs-comment'>-- * Music</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-comment'>-- There is always only one music lpaying at a single time.</span>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-comment'>-- | Loads and plays a music file once.</span>
<a name="line-57"></a><span class='hs-comment'>-- playMusic :: FilePath -&gt; IO ()</span>
<a name="line-58"></a><span class='hs-comment'>-- playMusic = error "playMusic"</span>
<a name="line-59"></a>
<a name="line-60"></a><span class='hs-comment'>-- | Loads and plays a music file in a loop.</span>
<a name="line-61"></a><span class='hs-comment'>-- Stops if the program ends or 'stopMusic' is called.</span>
<a name="line-62"></a><span class='hs-comment'>-- playMusicLooped :: FilePath -&gt; IO ()</span>
<a name="line-63"></a><span class='hs-comment'>-- playMusicLooped = error "playMusicLooped"</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='hs-comment'>-- | Stops any background music that is playing.</span>
<a name="line-66"></a><span class='hs-comment'>-- stopMusic :: IO ()</span>
<a name="line-67"></a><span class='hs-comment'>-- stopMusic = error "stopMusic"</span>
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