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163 lines
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<meta name="description" content="API documentation for the Rust `PCM` struct in crate `alsa`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, PCM">
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<title>alsa::pcm::PCM - Rust</title>
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<p class='location'>Struct PCM</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: 'PCM', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<section id='main' class="content">
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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=''>PCM</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='../../src/alsa/pcm.rs.html#96' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct PCM(_, _);</pre><div class='docblock'><p><a href="http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html">snd_pcm_t</a> wrapper - start here for audio playback and recording</p>
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</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl <a class="struct" href="../../alsa/pcm/struct.PCM.html" title="struct alsa::pcm::PCM">PCM</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#100-220' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.open' class="method"><span id='open.v' class='invisible'><code>fn <a href='#method.open' class='fnname'>open</a>(name: &<a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/c_str/struct.CStr.html" title="struct std::ffi::c_str::CStr">CStr</a>, dir: <a class="enum" href="../../alsa/enum.Direction.html" title="enum alsa::Direction">Direction</a>, nonblock: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.PCM.html" title="struct alsa::pcm::PCM">PCM</a>></code></span></h4>
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<h4 id='method.start' class="method"><span id='start.v' class='invisible'><code>fn <a href='#method.start' class='fnname'>start</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><code>fn <a href='#method.drop' class='fnname'>drop</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.pause' class="method"><span id='pause.v' class='invisible'><code>fn <a href='#method.pause' class='fnname'>pause</a>(&self, pause: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.resume' class="method"><span id='resume.v' class='invisible'><code>fn <a href='#method.resume' class='fnname'>resume</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.drain' class="method"><span id='drain.v' class='invisible'><code>fn <a href='#method.drain' class='fnname'>drain</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.prepare' class="method"><span id='prepare.v' class='invisible'><code>fn <a href='#method.prepare' class='fnname'>prepare</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.reset' class="method"><span id='reset.v' class='invisible'><code>fn <a href='#method.reset' class='fnname'>reset</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.recover' class="method"><span id='recover.v' class='invisible'><code>fn <a href='#method.recover' class='fnname'>recover</a>(&self, err: <a class="type" href="../../libc/type.c_int.html" title="type libc::c_int">c_int</a>, silent: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.wait' class="method"><span id='wait.v' class='invisible'><code>fn <a href='#method.wait' class='fnname'>wait</a>(&self, timeout_ms: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>></code></span></h4>
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<h4 id='method.state' class="method"><span id='state.v' class='invisible'><code>fn <a href='#method.state' class='fnname'>state</a>(&self) -> <a class="enum" href="../../alsa/pcm/enum.State.html" title="enum alsa::pcm::State">State</a></code></span></h4>
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<h4 id='method.bytes_to_frames' class="method"><span id='bytes_to_frames.v' class='invisible'><code>fn <a href='#method.bytes_to_frames' class='fnname'>bytes_to_frames</a>(&self, i: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a>) -> <a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a></code></span></h4>
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<h4 id='method.frames_to_bytes' class="method"><span id='frames_to_bytes.v' class='invisible'><code>fn <a href='#method.frames_to_bytes' class='fnname'>frames_to_bytes</a>(&self, i: <a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.isize.html">isize</a></code></span></h4>
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<h4 id='method.avail_update' class="method"><span id='avail_update.v' class='invisible'><code>fn <a href='#method.avail_update' class='fnname'>avail_update</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a>></code></span></h4>
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<h4 id='method.avail' class="method"><span id='avail.v' class='invisible'><code>fn <a href='#method.avail' class='fnname'>avail</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a>></code></span></h4>
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<h4 id='method.avail_delay' class="method"><span id='avail_delay.v' class='invisible'><code>fn <a href='#method.avail_delay' class='fnname'>avail_delay</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a>, <a class="type" href="../../alsa/pcm/type.Frames.html" title="type alsa::pcm::Frames">Frames</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>></code></span></h4>
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<h4 id='method.status' class="method"><span id='status.v' class='invisible'><code>fn <a href='#method.status' class='fnname'>status</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.Status.html" title="struct alsa::pcm::Status">Status</a>></code></span></h4>
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<h4 id='method.io_i8' class="method"><span id='io_i8.v' class='invisible'><code>fn <a href='#method.io_i8' class='fnname'>io_i8</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a>>></code></span></h4>
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<h4 id='method.io_u8' class="method"><span id='io_u8.v' class='invisible'><code>fn <a href='#method.io_u8' class='fnname'>io_u8</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>>></code></span></h4>
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<h4 id='method.io_i16' class="method"><span id='io_i16.v' class='invisible'><code>fn <a href='#method.io_i16' class='fnname'>io_i16</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i16.html">i16</a>>></code></span></h4>
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<h4 id='method.io_u16' class="method"><span id='io_u16.v' class='invisible'><code>fn <a href='#method.io_u16' class='fnname'>io_u16</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u16.html">u16</a>>></code></span></h4>
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<h4 id='method.io_i32' class="method"><span id='io_i32.v' class='invisible'><code>fn <a href='#method.io_i32' class='fnname'>io_i32</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>>></code></span></h4>
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<h4 id='method.io_u32' class="method"><span id='io_u32.v' class='invisible'><code>fn <a href='#method.io_u32' class='fnname'>io_u32</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>>></code></span></h4>
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<h4 id='method.io_f32' class="method"><span id='io_f32.v' class='invisible'><code>fn <a href='#method.io_f32' class='fnname'>io_f32</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f32.html">f32</a>>></code></span></h4>
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<h4 id='method.io_f64' class="method"><span id='io_f64.v' class='invisible'><code>fn <a href='#method.io_f64' class='fnname'>io_f64</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.f64.html">f64</a>>></code></span></h4>
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<h4 id='method.io' class="method"><span id='io.v' class='invisible'><code>fn <a href='#method.io' class='fnname'>io</a><'a>(&'a self) -> <a class="struct" href="../../alsa/pcm/struct.IO.html" title="struct alsa::pcm::IO">IO</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>></code></span></h4>
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<h4 id='method.hw_params' class="method"><span id='hw_params.v' class='invisible'><code>fn <a href='#method.hw_params' class='fnname'>hw_params</a>(&self, h: &<a class="struct" href="../../alsa/pcm/struct.HwParams.html" title="struct alsa::pcm::HwParams">HwParams</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<div class='docblock'><p>Sets hw parameters. Note: No IO object can exist for this PCM
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when hw parameters are set.</p>
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</div><h4 id='method.hw_params_current' class="method"><span id='hw_params_current.v' class='invisible'><code>fn <a href='#method.hw_params_current' class='fnname'>hw_params_current</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.HwParams.html" title="struct alsa::pcm::HwParams">HwParams</a><'a>></code></span></h4>
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<h4 id='method.sw_params' class="method"><span id='sw_params.v' class='invisible'><code>fn <a href='#method.sw_params' class='fnname'>sw_params</a>(&self, h: &<a class="struct" href="../../alsa/pcm/struct.SwParams.html" title="struct alsa::pcm::SwParams">SwParams</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.sw_params_current' class="method"><span id='sw_params_current.v' class='invisible'><code>fn <a href='#method.sw_params_current' class='fnname'>sw_params_current</a><'a>(&'a self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.SwParams.html" title="struct alsa::pcm::SwParams">SwParams</a><'a>></code></span></h4>
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<h4 id='method.info' class="method"><span id='info.v' class='invisible'><code>fn <a href='#method.info' class='fnname'>info</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.Info.html" title="struct alsa::pcm::Info">Info</a>></code></span></h4>
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<h4 id='method.dump' class="method"><span id='dump.v' class='invisible'><code>fn <a href='#method.dump' class='fnname'>dump</a>(&self, o: &mut <a class="struct" href="../../alsa/struct.Output.html" title="struct alsa::Output">Output</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.dump_hw_setup' class="method"><span id='dump_hw_setup.v' class='invisible'><code>fn <a href='#method.dump_hw_setup' class='fnname'>dump_hw_setup</a>(&self, o: &mut <a class="struct" href="../../alsa/struct.Output.html" title="struct alsa::Output">Output</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.dump_sw_setup' class="method"><span id='dump_sw_setup.v' class='invisible'><code>fn <a href='#method.dump_sw_setup' class='fnname'>dump_sw_setup</a>(&self, o: &mut <a class="struct" href="../../alsa/struct.Output.html" title="struct alsa::Output">Output</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.query_chmaps' class="method"><span id='query_chmaps.v' class='invisible'><code>fn <a href='#method.query_chmaps' class='fnname'>query_chmaps</a>(&self) -> <a class="struct" href="../../alsa/pcm/struct.ChmapsQuery.html" title="struct alsa::pcm::ChmapsQuery">ChmapsQuery</a></code></span></h4>
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<h4 id='method.set_chmap' class="method"><span id='set_chmap.v' class='invisible'><code>fn <a href='#method.set_chmap' class='fnname'>set_chmap</a>(&self, c: &<a class="struct" href="../../alsa/pcm/struct.Chmap.html" title="struct alsa::pcm::Chmap">Chmap</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
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<h4 id='method.get_chmap' class="method"><span id='get_chmap.v' class='invisible'><code>fn <a href='#method.get_chmap' class='fnname'>get_chmap</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/pcm/struct.Chmap.html" title="struct alsa::pcm::Chmap">Chmap</a>></code></span></h4>
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</div><h2 id='implementations'>Trait Implementations</h2><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../alsa/pcm/struct.PCM.html" title="struct alsa::pcm::PCM">PCM</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#98' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'></div><h3 class='impl'><span class='in-band'><code>impl <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.PCM.html" title="struct alsa::pcm::PCM">PCM</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#222-224' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.drop-1' class="method"><span id='drop.v-1' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop' class='fnname'>drop</a>(&mut self)</code></span></h4>
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<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>
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</div></div><h3 class='impl'><span class='in-band'><code>impl <a class="trait" href="../../alsa/poll/trait.PollDescriptors.html" title="trait alsa::poll::PollDescriptors">PollDescriptors</a> for <a class="struct" href="../../alsa/pcm/struct.PCM.html" title="struct alsa::pcm::PCM">PCM</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/alsa/pcm.rs.html#227-240' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.count' class="method"><span id='count.v' class='invisible'><code>fn <a href='../../alsa/poll/trait.PollDescriptors.html#tymethod.count' class='fnname'>count</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></span></h4>
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<h4 id='method.fill' class="method"><span id='fill.v' class='invisible'><code>fn <a href='../../alsa/poll/trait.PollDescriptors.html#tymethod.fill' class='fnname'>fill</a>(&self, p: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&mut [</a><a class="struct" href="../../libc/unix/struct.pollfd.html" title="struct libc::unix::pollfd">pollfd</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>></code></span></h4>
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<h4 id='method.revents' class="method"><span id='revents.v' class='invisible'><code>fn <a href='../../alsa/poll/trait.PollDescriptors.html#tymethod.revents' class='fnname'>revents</a>(&self, p: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[</a><a class="struct" href="../../libc/unix/struct.pollfd.html" title="struct libc::unix::pollfd">pollfd</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="../../alsa/poll/struct.PollFlags.html" title="struct alsa::poll::PollFlags">PollFlags</a>></code></span></h4>
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<h4 id='method.get' class="method"><span id='get.v' class='invisible'><code>fn <a href='../../alsa/poll/trait.PollDescriptors.html#method.get' class='fnname'>get</a>(&self) -> <a class="type" href="../../alsa/type.Result.html" title="type alsa::Result">Result</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="struct" href="../../libc/unix/struct.pollfd.html" title="struct libc::unix::pollfd">pollfd</a>>></code></span></h4>
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<div class='docblock'><p>Wrapper around count and fill - returns an array of pollfds</p>
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