Aaru.VideoNow/DiscImageChef.VideoNow/Program.cs

// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Program.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : VideoNow analyzing and decoding tools.
//
// --[ Description ] ----------------------------------------------------------
//
//     Main program loop.
//
// --[ 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 © 2011-2019 Natalia Portillo
// ****************************************************************************/

using System;
using System.IO;
using System.Linq;
using System.Reflection;

namespace DiscImageChef.VideoNow
{
    static class MainClass
    {
        static string                                AssemblyCopyright;
        static string                                AssemblyTitle;
        static AssemblyInformationalVersionAttribute AssemblyVersion;
        const int max_size = 635040000;
        static readonly byte[] frameMarker = { 0xE3, 0x81, 0xC7, 0xE3, 0x81, 0xC7, 0xE3, 0x81};

        public static void Main(string[] args)
        {
            object[] attributes = typeof(MainClass).Assembly.GetCustomAttributes(typeof(AssemblyTitleAttribute), false);
            AssemblyTitle = ((AssemblyTitleAttribute)attributes[0]).Title;
            attributes    = typeof(MainClass).Assembly.GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
            AssemblyVersion =
                Attribute.GetCustomAttribute(typeof(MainClass).Assembly, typeof(AssemblyInformationalVersionAttribute))
                    as AssemblyInformationalVersionAttribute;
            AssemblyCopyright = ((AssemblyCopyrightAttribute)attributes[0]).Copyright;

            PrintCopyright();

            if(args.Length != 1)
            {
                Console.WriteLine("Usage: DiscImageChef.VideoNow dump.raw");
                return;
            }

            if(!File.Exists(args[0]))
            {
                Console.WriteLine("Specified file does not exist.");
                return;
            }

            FileStream fs;
            try { fs = File.Open(args[0], FileMode.Open, FileAccess.Read, FileShare.Read); }
            catch
            {
                Console.WriteLine("Could not open specified file.");
                return;
            }

            if(fs.Length > max_size)
            {
                Console.WriteLine("File is too big, not continuing.");
                return;
            }

            Console.WriteLine("File: {0}", args[0]);
            Console.WriteLine("Searching for first frame....");

            long framePosition = 0;
            byte[] buffer = new byte[frameMarker.Length];

            while(framePosition < 19600)
            {
                fs.Position = framePosition;
                fs.Read(buffer, 0, buffer.Length);

                if(buffer.SequenceEqual(frameMarker)) break;

                framePosition++;
            }

            if(!buffer.SequenceEqual(frameMarker))
            {
                Console.WriteLine("Could not find any frame!");
                return;
            }

            Console.WriteLine("First frame found at {0}", framePosition);
            Console.WriteLine("First frame {0} at a sector boundary", framePosition % 2352 == 0 ? "is" : "is not");
        }

        static void PrintCopyright()
        {
            Console.WriteLine("{0} {1}", AssemblyTitle, AssemblyVersion?.InformationalVersion);
            Console.WriteLine("{0}",     AssemblyCopyright);
            Console.WriteLine();
        }

    }
}