64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
#include <Gamma/scl.h>
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#include "Ottobit.hpp"
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namespace Meris
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{
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void Ottobit::operator()(tick t)
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{
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// Only compute bit_factor when the control changes
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if (inputs.bits != previous_bits)
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{
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set_bit_factor();
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previous_bits = inputs.bits;
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}
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// Only compute skipped_frames when the control changes
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if (inputs.rate != previous_rate)
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{
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step_size = (1. - inputs.rate) * RATE;
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previous_rate = inputs.rate;
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}
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// Process the input buffer
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for(int i{0}; i < inputs.audio.channels; i++)
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{
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auto* in = inputs.audio[i];
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auto* out = outputs.audio[i];
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// Init current_frame for each channel
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double current_frame{crush_frame(in[0])};
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for(int j{0}; j < t.frames; j++)
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{
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if (skipped_frames[i] <= step_size)
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skipped_frames[i]++;
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else
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{
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skipped_frames[i] = 0;
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current_frame = crush_frame(in[j]);
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}
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out[j] = current_frame;
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}
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}
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}
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void Ottobit::set_bit_factor()
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{
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bit_factor = pow(2, inputs.bits) - 1;
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}
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double Ottobit::crush_frame(const double& f)
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{
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if (inputs.bits == BITS)
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return f;
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else
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{
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// Rounding using static_cast
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// return static_cast<double>(static_cast<int>(f * bit_factor)) / bit_factor;
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// Close, but prefer Lance Putnama's Gama's use of roundMagic
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return gam::scl::round<double>(f * bit_factor) / bit_factor;
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}
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}
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}
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