class AudioStream::Fx::Panning
Public Class Methods
new(pan: 0.0)
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# File lib/audio_stream/fx/panning.rb, line 4 def initialize(pan: 0.0) @pan = pan l_gain = 1.0 - pan lr_gain = 0.0 if 1.0<l_gain lr_gain = l_gain - 1.0 l_gain = 1.0 end r_gain = 1.0 + pan rl_gain = 0.0 if 1.0<r_gain rl_gain = r_gain - 1.0 r_gain = 1.0 end normalize = [1.0 - pan, 1.0 + pan].max @r_gain = r_gain / normalize @rl_gain = rl_gain / normalize @l_gain = l_gain / normalize @lr_gain = lr_gain / normalize end
Public Instance Methods
process(input)
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# File lib/audio_stream/fx/panning.rb, line 29 def process(input) return input if @pan==0.0 src = input.stereo.streams src0 = src[0] src1 = src[1] dst0 = Vdsp::DoubleArray.new(src0.length) Vdsp::UnsafeDouble.vsmsma(src0, 0, 1, @l_gain, src1, 0, 1, @lr_gain, dst0, 0, 1, src0.length) dst1 = Vdsp::DoubleArray.new(src1.length) Vdsp::UnsafeDouble.vsmsma(src0, 0, 1, @rl_gain, src1, 0, 1, @r_gain, dst1, 0, 1, src1.length) Buffer.new(dst0, dst1) end