Delay.cmajor

// Copyright (c) 2023 Alex M. Fink. All rights reserved.
// Licensed under the MIT License https://github.com/alexmfink/compufart

namespace Audolon::Delay (using FrameType, int MaxDelay)
{
    //! This is a simple delay line that zeros the buffer on delay changes
    struct DelayLine
    {
        // Note: All are init'ed to zero
        FrameType[MaxDelay] m_buffer;
        int m_delay;
        wrap<MaxDelay> m_tapIndex;

        FrameType GetNextOut()
        {
            return this.m_buffer[this.m_tapIndex];
        }

        FrameType Tick(FrameType inputSample)
        {
            FrameType outputSample = this.m_buffer[this.m_tapIndex];
            this.m_buffer[this.m_tapIndex] = inputSample;
            ++this.m_tapIndex;
            if (this.m_tapIndex >= this.m_delay)
            {
                this.m_tapIndex -= this.m_delay;
            }
            return outputSample;
        }
        
        void Reset()
        {
            for (wrap<MaxDelay> index)
            {
                this.m_buffer[index] = 0.0;
            }
            this.m_tapIndex = 0;
        }

        void SetDelayLength(int delayLength)
        {
            this.m_delay = Audolon::Utils::ClipValue(delayLength, 1, MaxDelay);
            this.Reset();
        }

        
    }
}