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Find first frame.

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Natalia Portillo
2019-01-29 18:50:07 +00:00
parent a0b7a541d9
commit 385b98208b
1 changed files with 55 additions and 0 deletions
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55
DiscImageChef.VideoNow/Program.cs
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@@ -31,6 +31,8 @@
// ****************************************************************************/
using System;
using System.IO;
using System.Linq;
using System.Reflection;
namespace DiscImageChef.VideoNow
@@ -40,6 +42,8 @@ namespace DiscImageChef.VideoNow
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)
{
@@ -52,6 +56,57 @@ namespace DiscImageChef.VideoNow
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()