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82 lines
3.3 KiB
Plaintext
82 lines
3.3 KiB
Plaintext
TITLE:: FluidBufThresh
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SUMMARY:: A Gate Processor for Buffers
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CATEGORIES:: Libraries>FluidCorpusManipulation
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RELATED:: Guides/FluidCorpusManipulation, Guides/FluidBufMultiThreading
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DESCRIPTION::
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This class implements a simple Buffer preprocessor, by replacing values under a threshold by 0s. It is part of the LINK:: Guides/FluidCorpusManipulation##Fluid Corpus Manipulation Toolkit::. For more explanations, learning material, and discussions on its musicianly uses, visit http://www.flucoma.org/
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The process will return a buffer with the same size and shape than the requested range.
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STRONG::Threading::
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By default, this UGen spawns a new thread to avoid blocking the server command queue, so it is free to go about with its business. For a more detailed discussion of the available threading and monitoring options, including the two undocumented Class Methods below (.processBlocking and .kr) please read the guide LINK::Guides/FluidBufMultiThreading::.
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CLASSMETHODS::
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METHOD:: process, processBlocking
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This is the method that calls for the thresholding to be calculated on a given source buffer.
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ARGUMENT:: server
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The server on which the buffer to be processed is allocated.
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ARGUMENT:: source
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The index of the buffer to use as the source material to be processed.
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ARGUMENT:: startFrame
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The starting point (in samples) from which to copy in the source buffer.
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ARGUMENT:: numFrames
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The duration (in samples) to copy from the source buffer. The default (-1) copies the full lenght of the buffer.
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ARGUMENT:: startChan
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The first channel from which to copy in the source buffer.
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ARGUMENT:: numChans
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The number of channels from which to copy in the source buffer. This parameter will wrap around the number of channels in the source buffer. The default (-1) copies all of the buffer's channel.
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ARGUMENT:: destination
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The index of the buffer to use as the destination for the processed material.
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ARGUMENT:: threshold
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The threshold under which values will be zeroed
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ARGUMENT:: freeWhenDone
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Free the server instance when processing complete. Default true
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ARGUMENT:: action
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A Function to be evaluated once the offline process has finished and indices instance variables have been updated on the client side. The metric will be passed indices as an argument.
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returns:: an instance of the processor
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EXAMPLES::
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code::
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// make a buffer of know qualities
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b = Buffer.sendCollection(s,0.0.series(0.1,1.0))
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// and a destination buffer
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c = Buffer(s)
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// play with the threshold
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FluidBufThresh.process(s, b, destination: c, threshold: 0.5)
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// retrieve the buffer and enjoy the results.
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c.getn(0,11,{|x|x.round(0.000001).postln;})
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// also works in multichannel - explore the following buffer
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b = Buffer.sendCollection(s,0.0.series(0.1,2.0).scramble,2)
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b.plot.plotMode_(\points)
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//process and keep just the top values
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FluidBufThresh.process(s, b, destination: c, threshold: 1.6)
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//enjoy
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c.plot.plotMode_(\points)
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//also works with a subset of the input, resizing the output
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b = Buffer.sendCollection(s,0.0.series(0.1,3.0).reshape(3,10).flop.flat,3)
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b.plot(separately: true).plotMode_(\points)
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//process and keep just the top values
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FluidBufThresh.process(s, b,startFrame: 3,numFrames: 4,startChan: 1,numChans: 1,destination: c, threshold: 1.6)
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//enjoy
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c.plot(separately: true).plotMode_(\points)
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c.query
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c.getn(0,4,{|x|x.round(0.000001).postln;})
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::
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