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77 lines
2.7 KiB
C#
77 lines
2.7 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Helpers.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Contains helpers for KryoFlux STREAM images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2026 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Diagnostics.CodeAnalysis;
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namespace Aaru.Images;
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[SuppressMessage("ReSharper", "UnusedType.Global")]
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public sealed partial class KryoFlux
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{
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/// <summary>
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/// Converts a uint32 cell value to Aaru's flux representation format.
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/// Format: byte array where 255 = overflow, remainder = value
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/// </summary>
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/// <param name="ticks">The cell value in clock cycles</param>
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/// <returns>Flux representation as byte array</returns>
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static byte[] UInt32ToFluxRepresentation(uint ticks)
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{
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uint over = ticks / 255;
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if(over == 0) return [(byte)ticks];
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var expanded = new byte[over + 1];
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Array.Fill(expanded, (byte)255, 0, (int)over);
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expanded[^1] = (byte)(ticks % 255);
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return expanded;
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}
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/// <summary>
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/// Calculates resolution in picoseconds from sample clock frequency.
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/// Resolution = (1 / sck) * 1e12 picoseconds
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/// </summary>
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/// <param name="sck">Sample clock frequency in Hz</param>
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/// <returns>Resolution in picoseconds</returns>
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static ulong CalculateResolution(double sck)
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{
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if(sck <= 0) return 0;
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double periodSeconds = 1.0 / sck;
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double periodPicoseconds = periodSeconds * 1e12;
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return (ulong)periodPicoseconds;
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}
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}
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