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<div class="title">River configuration file </div> </div>
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<div class="contents">
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<div class="toc"><h3>Table of Contents</h3>
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<ul><li class="level1"><a href="#audio_river_config_file_objectif">Objectifs: </a></li>
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<li class="level1"><a href="#audio_river_config_file_bases">Basis: </a></li>
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<li class="level1"><a href="#audio_river_config_file_hw_config">Harware configuration: </a></li>
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<div class="textblock"><h1><a class="anchor" id="audio_river_config_file_objectif"></a>
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Objectifs: </h1>
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<ul>
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<li>Understand the architecture of the configuration file.</li>
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<li>all that can be done with it.</li>
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</ul>
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<h1><a class="anchor" id="audio_river_config_file_bases"></a>
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Basis: </h1>
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<p>The river configuration file is a json file. We use <a class="elRef" doxygen="/home/heero/dev/perso/out/doc/release/ejson.tag:http://atria-soft.github.io/ejson/" href="http://atria-soft.github.io/ejson/index.html#ejson_mainpage_what">What is EJSON: </a> to parse it then we have some writing facilities.</p>
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<p>River provide a list a harware interface and virtual interface.</p>
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<p>The hardware interface are provided by <a class="elRef" doxygen="/home/heero/dev/perso/out/doc/release/audio-orchestra.tag:http://musicdsp.github.io/audio-orchestra/" href="http://musicdsp.github.io/audio-orchestra/index.html#audio_orchestra_mainpage_what">What is AUDIO-ORCHESTRA: </a> then we will plug on every platform.</p>
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<p>The file is simply architecture around a list of object:</p>
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<div class="fragment"><div class="line">{</div><div class="line"> "speaker":{</div><div class="line"></div><div class="line"> },</div><div class="line"> "microphone":{</div><div class="line"></div><div class="line"> },</div><div class="line"> "mixed-in-out":{</div><div class="line"></div><div class="line"> },</div><div class="line">}</div></div><!-- fragment --><p>With this config we declare 3 interfaces : speaker, microphone and mixed-in-out.</p>
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<h1><a class="anchor" id="audio_river_config_file_hw_config"></a>
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Harware configuration: </h1>
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<p>In every interface we need to define some Element:</p><ul>
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<li>"io" : Can be input/output/... depending of virtual interface...</li>
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<li>"map-on": An object to configure airtaudio interface.</li>
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<li>"frequency": 0 to automatic select one. Or the frequency to open harware device</li>
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<li>"channel-map": List of all channel in the stream:<ul>
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<li>"front-left"</li>
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<li>"front-center"</li>
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<li>"front-right"</li>
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<li>"rear-left"</li>
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<li>"rear-center"</li>
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<li>"rear-right"</li>
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<li>"surround-left",</li>
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<li>"surround-right",</li>
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<li>"sub-woofer",</li>
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<li>"lfe"</li>
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</ul>
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</li>
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<li>"type": Fomat to open the stream:<ul>
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<li>"auto": Detect the best type</li>
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<li>"int8",</li>
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<li>"int8-on-int16",</li>
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<li>"int16",</li>
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<li>"int16-on-int32",</li>
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<li>"int24",</li>
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<li>"int32",</li>
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<li>"int32-on-int64",</li>
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<li>"int64",</li>
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<li>"float",</li>
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<li>"double"</li>
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</ul>
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</li>
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<li>"nb-chunk": Number of chunk to open the stream. </li>
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</ul>
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