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Natalia Portillo
2020-02-26 19:10:46 +00:00
parent e133798583
commit f5b199e483
1417 changed files with 109 additions and 109 deletions
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97
Aaru.Core/Sidecar/Helpers.cs Normal file
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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : Helpers.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Core algorithms.
//
// --[ Description ] ----------------------------------------------------------
//
// Contains helper logic used on sidecar creation.
//
// --[ License ] --------------------------------------------------------------
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2020 Natalia Portillo
// ****************************************************************************/
namespace DiscImageChef.Core
{
public partial class Sidecar
{
/// <summary>
/// Converts a LBA to MM:SS:FF string for CDs
/// </summary>
/// <param name="lba">LBA</param>
/// <returns>MM:SS:FF</returns>
static string LbaToMsf(long lba)
{
long m, s, f;
if(lba >= -150)
{
m = (lba + 150) / (75 * 60);
lba -= m * (75 * 60);
s = (lba + 150) / 75;
lba -= s * 75;
f = lba + 150;
}
else
{
m = (lba + 450150) / (75 * 60);
lba -= m * (75 * 60);
s = (lba + 450150) / 75;
lba -= s * 75;
f = lba + 450150;
}
return $"{m}:{s:D2}:{f:D2}";
}
/// <summary>
/// Converts a LBA to MM:SS:FF string for DDCDs
/// </summary>
/// <param name="lba">LBA</param>
/// <returns>MM:SS:FF</returns>
static string DdcdLbaToMsf(long lba)
{
long h, m, s, f;
if(lba >= -150)
{
h = (lba + 150) / (75 * 60 * 60);
lba -= h * (75 * 60 * 60);
m = (lba + 150) / (75 * 60);
lba -= m * (75 * 60);
s = (lba + 150) / 75;
lba -= s * 75;
f = lba + 150;
}
else
{
h = (lba + 450150 * 2) / (75 * 60 * 60);
lba -= h * (75 * 60 * 60);
m = (lba + 450150 * 2) / (75 * 60);
lba -= m * (75 * 60);
s = (lba + 450150 * 2) / 75;
lba -= s * 75;
f = lba + 450150 * 2;
}
return string.Format("{3}:{0:D2}:{1:D2}:{2:D2}", m, s, f, h);
}
}
}