Implement AnalyserNode
<s>Needs https://github.com/servo/media/pull/127 to land (and a dependency
update)</s>
r? @ferjm
realtimeanalyser-fft-scaling.html, the test that actually checks for some level of FFT correctness, sadly doesn't work since we don't process nodes not connected to the destination.
However I locally fixed the test to work differently and it passed. We'll fix the processing model eventually.
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Current pixel density
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Pass through channel settings in AudioNode constructor
Most audionodes let you pass in channel count/etc settings in their
constructors, and have different defaults. Using the `create_node`
argument added in https://github.com/servo/media/pull/124 , this passes
that information through.
r? @ferjm.
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Various webgl fixes for framebuffer attachment test
These changes resolve all panics on macOS when running framebuffer-object-attachment.html in headless and headful testing.
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- [x] Fixes#13710. Fixes#20570.
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Reacting to environment changes
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Add support for multichannel decoded audio
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