watson-speech
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IBM Watson Speech to Text and Text to Speech SDK for web browsers.
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<h1 class="page-title">Class: MediaElementAudioStream</h1>
<section>
<header>
<h2>MediaElementAudioStream</h2>
</header>
<article>
<div class="container-overview">
<h4 class="name" id="MediaElementAudioStream"><span class="type-signature"></span>new MediaElementAudioStream<span class="signature">(source, opts<span class="signature-attributes">opt</span>)</span><span class="type-signature"></span></h4>
<div class="description">
Turns a MediaStream object (from getUserMedia) into a Node.js Readable stream and converts the audio to Buffers
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>source</code></td>
<td class="type">
<span class="param-type">MediaStream</span>
|
<span class="param-type">HTMLMediaElement</span>
</td>
<td class="attributes">
</td>
<td class="description last">either https://developer.mozilla.org/en-US/docs/Web/API/MediaStream or https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement</td>
</tr>
<tr>
<td class="name"><code>opts</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">options
<h6>Properties</h6>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>bufferSize</code></td>
<td class="type">
<span class="param-type">Number</span>
|
<span class="param-type">null</span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="default">
null
</td>
<td class="description last">https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createScriptProcessor</td>
</tr>
<tr>
<td class="name"><code>muteSource</code></td>
<td class="type">
<span class="param-type">Boolean</span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="default">
false
</td>
<td class="description last">If true, the audio will not be sent back to the source
// todo: add option for whether to keep or destroy the context</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="media-element-audio-stream.js.html">media-element-audio-stream.js</a>, <a href="media-element-audio-stream.js.html#line19">line 19</a>
</li></ul></dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getUserMedia">https://developer.mozilla.org/en-US/docs/Web/API/Navigator/getUserMedia</a></li>
</ul>
</dd>
</dl>
</div>
<h3 class="subsection-title">Methods</h3>
<h4 class="name" id=".toRaw"><span class="type-signature">(static) </span>toRaw<span class="signature">(chunk)</span><span class="type-signature"> → {Float32Array}</span></h4>
<div class="description">
Converts a Buffer back into the raw Float32Array format that browsers use.
Note: this is just a new DataView for the same underlying buffer -
the actual audio data is not copied or changed here.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>chunk</code></td>
<td class="type">
<span class="param-type">Buffer</span>
</td>
<td class="description last">node-style buffer of audio data from a 'data' event or read() call</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="media-element-audio-stream.js.html">media-element-audio-stream.js</a>, <a href="media-element-audio-stream.js.html#line147">line 147</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
raw 32-bit float data view of audio data
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Float32Array</span>
</dd>
</dl>
<h4 class="name" id="~connect"><span class="type-signature">(inner) </span>connect<span class="signature">()</span><span class="type-signature"></span></h4>
<div class="description">
Setup script processor to extract audio and also re-connect it via a no-op gain node if desired
Delayed to avoid processing the stream of silence received before the file begins playing
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="media-element-audio-stream.js.html">media-element-audio-stream.js</a>, <a href="media-element-audio-stream.js.html#line81">line 81</a>
</li></ul></dd>
</dl>
<h4 class="name" id="~processAudio"><span class="type-signature">(inner) </span>processAudio<span class="signature">(e)</span><span class="type-signature"></span></h4>
<div class="description">
Convert and emit the raw audio data
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>e</code></td>
<td class="type">
<span class="param-type">AudioProcessingEvent</span>
</td>
<td class="description last">https://developer.mozilla.org/en-US/docs/Web/API/AudioProcessingEvent</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="media-element-audio-stream.js.html">media-element-audio-stream.js</a>, <a href="media-element-audio-stream.js.html#line53">line 53</a>
</li></ul></dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/ScriptProcessorNode/onaudioprocess">https://developer.mozilla.org/en-US/docs/Web/API/ScriptProcessorNode/onaudioprocess</a></li>
</ul>
</dd>
</dl>
</article>
</section>
</div>
<nav>
<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="FormatStream.html">FormatStream</a></li><li><a href="MediaElementAudioStream.html">MediaElementAudioStream</a></li><li><a href="RecognizeStream.html">RecognizeStream</a></li><li><a href="TimingStream.html">TimingStream</a></li><li><a href="WebAudioL16Stream.html">WebAudioL16Stream</a></li></ul><h3>Events</h3><ul><li><a href="RecognizeStream.html#event:connection-close">connection-close</a></li><li><a href="RecognizeStream.html#event:data">data</a></li><li><a href="RecognizeStream.html#event:error">error</a></li><li><a href="RecognizeStream.html#event:results">results</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.0</a> on Mon Feb 08 2016 19:53:13 GMT+0000 (UTC)
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