pnmixer-rust/alsa/pcm/struct.IO.html
2017-07-15 01:30:16 +02:00

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<p class='location'>Struct IO</p><div class="block items"><ul><li><a href="#methods">Methods</a></li><li><a href="#implementations">Trait Implementations</a></li></ul></div><p class='location'><a href='../index.html'>alsa</a>::<wbr><a href='index.html'>pcm</a></p><script>window.sidebarCurrent = {name: 'IO', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>alsa</a>::<wbr><a href='index.html'>pcm</a>::<wbr><a class="struct" href=''>IO</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
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</span><a class='srclink' href='../../src/alsa/pcm.rs.html#246' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'>pub struct IO&lt;'a, S:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>&gt;(_, _);</pre><div class='docblock'><p>Sample format dependent struct for reading from and writing data to a <code>PCM</code>.
Also implements <code>std::io::Read</code> and <code>std::io::Write</code>.</p>
<p>Note: Only one IO object is allowed in scope at a time (for mmap safety).</p>
</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl&lt;'a, S:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>&gt; <a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a>&lt;'a, S&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#252-313' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.writei' class="method"><span id='writei.v' class='invisible'><code>fn <a href='#method.writei' class='fnname'>writei</a>(&amp;self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</a>S<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></h4>
<div class='docblock'><p>On success, returns number of <em>frames</em> written.
(Multiply with number of channels to get number of items in buf successfully written.)</p>
</div><h4 id='method.readi' class="method"><span id='readi.v' class='invisible'><code>fn <a href='#method.readi' class='fnname'>readi</a>(&amp;self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a>S<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></h4>
<div class='docblock'><p>On success, returns number of <em>frames</em> read.
(Multiply with number of channels to get number of items in buf successfully read.)</p>
</div><h4 id='method.mmap' class="method"><span id='mmap.v' class='invisible'><code>fn <a href='#method.mmap' class='fnname'>mmap</a>&lt;F:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a>S<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;&amp;self, <br>&nbsp;&nbsp;&nbsp;&nbsp;frames: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br>&nbsp;&nbsp;&nbsp;&nbsp;func: F<br>) -&gt; <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></h4>
<div class='docblock'><p>Wrapper around snd_pcm_mmap_begin and snd_pcm_mmap_commit.</p>
<p>You can read/write into the sound card&#39;s buffer during the call to the closure.
According to alsa-lib docs, you should call avail_update before calling this function.</p>
<p>All calculations are in <em>frames</em>, i e, the closure should return number of frames processed.
Also, there might not be as many frames to read/write as requested, and there can even be
an empty buffer supplied to the closure.</p>
<p>Note: This function works only with interleaved access mode.</p>
</div></div><h2 id='implementations'>Trait Implementations</h2><h3 class='impl'><span class='in-band'><code>impl&lt;'a, S:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a>&lt;'a, S&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#248-250' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop' class='fnname'>drop</a>(&amp;mut self)</code></span></h4>
<div class='docblock'><p>A method called when the value goes out of scope. <a href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl&lt;'a, S:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a>&lt;'a, S&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#315-322' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.read' class="method"><span id='read.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read' class='fnname'>read</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></h4>
<div class='docblock'><p>Pull some bytes from this source into the specified buffer, returning how many bytes were read. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read">Read more</a></p>
</div><h4 id='method.initializer' class="method"><span id='initializer.v' class='invisible'><code>unsafe fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer' class='fnname'>initializer</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Initializer.html" title="struct std::io::Initializer">Initializer</a></code></span></h4>
<div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>read_initializer</code>)</div></div><div class='docblock'><p>Determines if this <code>Read</code>er can work with buffers of uninitialized memory. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer">Read more</a></p>
</div><h4 id='method.read_to_end' class="method"><span id='read_to_end.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end' class='fnname'>read_to_end</a>(&amp;mut self, buf: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Read all bytes until EOF in this source, placing them into <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end">Read more</a></p>
</div><h4 id='method.read_to_string' class="method"><span id='read_to_string.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string' class='fnname'>read_to_string</a>(&amp;mut self, buf: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Read all bytes until EOF in this source, placing them into <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string">Read more</a></p>
</div><h4 id='method.read_exact' class="method"><span id='read_exact.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact' class='fnname'>read_exact</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code><div class='since' title='Stable since Rust version 1.6.0'>1.6.0</div></span></h4>
<div class='docblock'><p>Read the exact number of bytes required to fill <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact">Read more</a></p>
</div><h4 id='method.by_ref' class="method"><span id='by_ref.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref' class='fnname'>by_ref</a>(&amp;mut self) -&gt; &amp;mut Self</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Creates a &quot;by reference&quot; adaptor for this instance of <code>Read</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref">Read more</a></p>
</div><h4 id='method.bytes' class="method"><span id='bytes.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes' class='fnname'>bytes</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</a>&lt;Self&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Transforms this <code>Read</code> instance to an <code>Iterator</code> over its bytes. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes">Read more</a></p>
</div><h4 id='method.chars' class="method"><span id='chars.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chars' class='fnname'>chars</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chars.html" title="struct std::io::Chars">Chars</a>&lt;Self&gt;</code></span></h4>
<div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>io</code>)</summary><p>the semantics of a partial read/write of where errors happen is currently unclear and may change</p>
</details></div></div><div class='docblock'><p>Transforms this <code>Read</code> instance to an <code>Iterator</code> over <code>char</code>s. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chars">Read more</a></p>
</div><h4 id='method.chain' class="method"><span id='chain.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain' class='fnname'>chain</a>&lt;R&gt;(self, next: R) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a>&lt;Self, R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Creates an adaptor which will chain this stream with another. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain">Read more</a></p>
</div><h4 id='method.take' class="method"><span id='take.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take' class='fnname'>take</a>(self, limit: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</a>&lt;Self&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Creates an adaptor which will read at most <code>limit</code> bytes from it. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl&lt;'a, S:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Copy.html" title="trait core::marker::Copy">Copy</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a>&lt;'a, S&gt;</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#324-332' title='goto source code'>[src]</a></span></h3>
<div class='impl-items'><h4 id='method.write' class="method"><span id='write.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.write' class='fnname'>write</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></h4>
<div class='docblock'><p>Write a buffer into this object, returning how many bytes were written. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.write">Read more</a></p>
</div><h4 id='method.flush' class="method"><span id='flush.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.flush' class='fnname'>flush</a>(&amp;mut self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>&gt;</code></span></h4>
<div class='docblock'><p>Flush this output stream, ensuring that all intermediately buffered contents reach their destination. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.flush">Read more</a></p>
</div><h4 id='method.write_all' class="method"><span id='write_all.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_all' class='fnname'>write_all</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Attempts to write an entire buffer into this write. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_all">Read more</a></p>
</div><h4 id='method.write_fmt' class="method"><span id='write_fmt.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_fmt' class='fnname'>write_fmt</a>(&amp;mut self, fmt: <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Arguments.html" title="struct core::fmt::Arguments">Arguments</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Writes a formatted string into this writer, returning any error encountered. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_fmt">Read more</a></p>
</div><h4 id='method.by_ref-1' class="method"><span id='by_ref.v-1' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.by_ref' class='fnname'>by_ref</a>(&amp;mut self) -&gt; &amp;mut Self</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h4>
<div class='docblock'><p>Creates a &quot;by reference&quot; adaptor for this instance of <code>Write</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.by_ref">Read more</a></p>
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<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
</div>
</div>
</aside>
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