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Merge pull request #754 from Djuffin/rgb
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<div class="head">
<p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
<h1 class="p-name no-ref" id="title">Linear PCM WebCodecs Registration</h1>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">Editor’s Draft</a>, <time class="dt-updated" datetime="2024-04-08">8 April 2024</time></p>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#ED">Editor’s Draft</a>, <time class="dt-updated" datetime="2024-04-19">19 April 2024</time></p>
<details open>
<summary>More details about this document</summary>
<div data-fill-with="spec-metadata">
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<li data-md>
<p>pcm-s16, using format <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#dom-audiosampleformat-s16" id="ref-for-dom-audiosampleformat-s16">s16</a></code></p>
<li data-md>
<p>pcm-s24, using three <a href="https://webidl.spec.whatwg.org/#idl-octet">byte</a> (24-bit) <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#violation-sample" id="ref-for-violation-sample">samples</a> with <a data-link-type="dfn" href="https://w3c.github.io/webcodecs/#interleaved" id="ref-for-interleaved">interleaved</a> <a href="https://w3c.github.io/webcodecs/#audio-buffer-arrangement">channel arrangement</a>.</p>
<p>pcm-s24, using three <a href="https://webidl.spec.whatwg.org/#idl-octet">byte</a> (24-bit) <a data-link-type="dfn" href="https://gpuweb.github.io/gpuweb/wgsl/#interpolation-sampling-sample" id="ref-for-interpolation-sampling-sample">samples</a> with <a data-link-type="dfn" href="https://w3c.github.io/webcodecs/#interleaved" id="ref-for-interleaved">interleaved</a> <a href="https://w3c.github.io/webcodecs/#audio-buffer-arrangement">channel arrangement</a>.</p>
<li data-md>
<p>pcm-s32, using format <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#dom-audiosampleformat-s32" id="ref-for-dom-audiosampleformat-s32">s32</a></code></p>
<li data-md>
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values are sampled at a regular interval, and where the quantization levels
between two successive values are linearly uniform.</p>
<p><code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#encodedaudiochunk" id="ref-for-encodedaudiochunk③">EncodedAudioChunk</a></code> <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#dom-encodedaudiochunk-internal-data-slot" id="ref-for-dom-encodedaudiochunk-internal-data-slot①">[[internal data]]</a></code> is expected to be
a sequence of bytes of arbitrary length, with a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#violation-sample" id="ref-for-violation-sample①">sample</a> occuring every N
bits, where N is defined by the codec string. For multichannel PCM, <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#violation-sample" id="ref-for-violation-sample②">samples</a> from different channels are <a data-link-type="dfn" href="https://w3c.github.io/webcodecs/#interleaved" id="ref-for-interleaved①">interleaved</a>.</p>
a sequence of bytes of arbitrary length, with a <a data-link-type="dfn" href="https://gpuweb.github.io/gpuweb/wgsl/#interpolation-sampling-sample" id="ref-for-interpolation-sampling-sample①">sample</a> occuring every N
bits, where N is defined by the codec string. For multichannel PCM, <a data-link-type="dfn" href="https://gpuweb.github.io/gpuweb/wgsl/#interpolation-sampling-sample" id="ref-for-interpolation-sampling-sample②">samples</a> from different channels are <a data-link-type="dfn" href="https://w3c.github.io/webcodecs/#interleaved" id="ref-for-interleaved①">interleaved</a>.</p>
<h2 class="heading settled" data-level="3" id="audiodecoderconfig-description"><span class="secno">3. </span><span class="content">AudioDecoderConfig description</span><a class="self-link" href="#audiodecoderconfig-description"></a></h2>
<p>The <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#dom-audiodecoderconfig-description" id="ref-for-dom-audiodecoderconfig-description①">description</a></code> is expected to be omitted from the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webcodecs/#dictdef-audiodecoderconfig" id="ref-for-dictdef-audiodecoderconfig">AudioDecoderConfig</a></code>.</p>
<h2 class="heading settled" data-level="4" id="encodedaudiochunk-type"><span class="secno">4. </span><span class="content">EncodedAudioChunk type</span><a class="self-link" href="#encodedaudiochunk-type"></a></h2>
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<h2 class="no-num no-ref heading settled" id="index"><span class="content">Index</span><a class="self-link" href="#index"></a></h2>
<h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span class="content">Terms defined by reference</span><a class="self-link" href="#index-defined-elsewhere"></a></h3>
<ul class="index">
<li>
<a data-link-type="biblio">[CSP3]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="dec095e6">sample</span>
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<li>
<a data-link-type="biblio">[WEBCODECS]</a> defines the following terms:
<ul>
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<li><span class="dfn-paneled" id="ddb7e353">s32</span>
<li><span class="dfn-paneled" id="f26e6cf2">u8</span>
</ul>
<li>
<a data-link-type="biblio">[WGSL]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="915c0f98">sample</span>
</ul>
</ul>
<h2 class="no-num no-ref heading settled" id="references"><span class="content">References</span><a class="self-link" href="#references"></a></h2>
<h3 class="no-num no-ref heading settled" id="normative"><span class="content">Normative References</span><a class="self-link" href="#normative"></a></h3>
<dl>
<dt id="biblio-csp3">[CSP3]
<dd>Mike West; Antonio Sartori. <a href="https://w3c.github.io/webappsec-csp/"><cite>Content Security Policy Level 3</cite></a>. URL: <a href="https://w3c.github.io/webappsec-csp/">https://w3c.github.io/webappsec-csp/</a>
<dt id="biblio-rfc2119">[RFC2119]
<dd>S. Bradner. <a href="https://datatracker.ietf.org/doc/html/rfc2119"><cite>Key words for use in RFCs to Indicate Requirement Levels</cite></a>. March 1997. Best Current Practice. URL: <a href="https://datatracker.ietf.org/doc/html/rfc2119">https://datatracker.ietf.org/doc/html/rfc2119</a>
<dt id="biblio-webcodecs">[WEBCODECS]
<dd>Paul Adenot; Bernard Aboba; Eugene Zemtsov. <a href="https://w3c.github.io/webcodecs/"><cite>WebCodecs</cite></a>. URL: <a href="https://w3c.github.io/webcodecs/">https://w3c.github.io/webcodecs/</a>
<dt id="biblio-webidl">[WEBIDL]
<dd>Edgar Chen; Timothy Gu. <a href="https://webidl.spec.whatwg.org/"><cite>Web IDL Standard</cite></a>. Living Standard. URL: <a href="https://webidl.spec.whatwg.org/">https://webidl.spec.whatwg.org/</a>
<dt id="biblio-wgsl">[WGSL]
<dd>Alan Baker; Mehmet Oguz Derin; David Neto. <a href="https://gpuweb.github.io/gpuweb/wgsl/"><cite>WebGPU Shading Language</cite></a>. URL: <a href="https://gpuweb.github.io/gpuweb/wgsl/">https://gpuweb.github.io/gpuweb/wgsl/</a>
</dl>
<h3 class="no-num no-ref heading settled" id="informative"><span class="content">Informative References</span><a class="self-link" href="#informative"></a></h3>
<dl>
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