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<span class="comment">--[[
name: soundfile test
description: A simple demo that plays an audio file.
author: osar.fr
--]]</span>

<span class="global">require</span> <span class="string">"include/protoplug"</span>

<span class="keyword">local</span> path = <span class="string">"C:\\temp\\pluck44.wav"</span>
<span class="keyword">local</span> wave, len

<span class="comment">-- 'prepareToPlay' will be triggered when the host sample rate is known,
</span><span class="comment">-- so we can load sound files with automatic sample rate conversion:
</span>plugin.addHandler(<span class="string">'prepareToPlay'</span>, <span class="keyword">function</span>()
	<span class="keyword">local</span> readr = juce.AudioFormatReader(path)
	<span class="keyword">if</span> readr==<span class="keyword">nil</span> <span class="keyword">then</span> error (<span class="string">"can't open wave: "</span>..path) <span class="keyword">end</span>
	wave, len = readr:readToFloat(<span class="number">2</span>) <span class="comment">-- require 2 channels
</span><span class="keyword">end</span>)

polyGen.initTracks(<span class="number">8</span>)

<span class="keyword">function</span> polyGen.VTrack:noteOn(note, vel, ev)
	self.playing = <span class="keyword">true</span>
	self.wavepos = <span class="number">0</span>
<span class="keyword">end</span>

<span class="keyword">function</span> polyGen.VTrack:noteOff(note, ev)
	self.playing = <span class="keyword">false</span>
<span class="keyword">end</span>

<span class="keyword">function</span> polyGen.VTrack:addProcessBlock(samples, smax)
	<span class="keyword">for</span> i = <span class="number">0</span>,smax <span class="keyword">do</span>
		<span class="keyword">if</span> self.playing <span class="keyword">and</span> self.wavepos &lt; len <span class="keyword">then</span>
			self.wavepos = self.wavepos + <span class="number">1</span>
			samples[<span class="number">0</span>][i] = samples[<span class="number">0</span>][i] + wave[<span class="number">0</span>][self.wavepos] <span class="comment">-- left
</span>			samples[<span class="number">1</span>][i] = samples[<span class="number">1</span>][i] + wave[<span class="number">1</span>][self.wavepos] <span class="comment">-- right
</span>		<span class="keyword">end</span>
	<span class="keyword">end</span>
<span class="keyword">end</span></pre>


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