private bool findCammBox(BinaryReader movieIn, long endPosition)
{
byte[] mdia = Encoding.ASCII.GetBytes(@"mdia");
byte[] minf = Encoding.ASCII.GetBytes(@"minf");
byte[] stbl = Encoding.ASCII.GetBytes(@"stbl");
byte[] stsd = Encoding.ASCII.GetBytes(@"stsd");
byte[] camm = Encoding.ASCII.GetBytes(@"camm");
do
{
var next = new atomlib.Container();
next.ReadBoxHeader(movieIn);
System.Console.WriteLine("fCB - " + System.Text.Encoding.ASCII.GetString(next.name));
if (next.CompareName(mdia))
{
if (findContainer(minf, movieIn, movieIn.BaseStream.Position + next.length - next.headerLength))
{
if (findContainer(stbl, movieIn, movieIn.BaseStream.Position + next.length - next.headerLength))
{
if (findContainer(stsd, movieIn, movieIn.BaseStream.Position + next.length - next.headerLength))
{
movieIn.BaseStream.Seek(8, SeekOrigin.Current);
return(findContainer(camm, movieIn, movieIn.BaseStream.Position + next.length - next.headerLength));
}
}
}
}
movieIn.BaseStream.Seek(next.length - next.headerLength, SeekOrigin.Current);
} while (movieIn.BaseStream.Position < endPosition);
return(false);
}
private bool findContainer(byte[] name, BinaryReader movieIn, long endPosition)
{
do
{
var next = new atomlib.Container();
next.ReadBoxHeader(movieIn);
System.Console.WriteLine("fC - " + System.Text.Encoding.ASCII.GetString(next.name));
if (next.CompareName(name))
{
return(true);
}
movieIn.BaseStream.Seek(next.length - next.headerLength, SeekOrigin.Current);
} while (movieIn.BaseStream.Position < endPosition);
return(false);
}
public void ProcessMoov(BinaryReader movieIn, BinaryWriter movieOut)
{
byte[] trak = Encoding.ASCII.GetBytes(@"trak");
long endPosition = movieIn.BaseStream.Position;
var moov = new atomlib.Container();
moov.ReadBoxHeader(movieIn);
endPosition += moov.length;
do
{
var next = new atomlib.Container();
next.ReadBoxHeader(movieIn);
System.Console.WriteLine("PM - " + System.Text.Encoding.ASCII.GetString(next.name));
if (next.CompareName(trak))
{
long startPosition = movieIn.BaseStream.Position;
bool foundCamm = findCammBox(movieIn, movieIn.BaseStream.Position + next.length - next.headerLength);
movieIn.BaseStream.Seek(startPosition, SeekOrigin.Begin);
if (foundCamm)
{
// need write this one out bit by bit
next.CopyBox(movieIn, movieOut);
}
else
{
next.CopyBox(movieIn, movieOut);
}
}
else
{
next.CopyBox(movieIn, movieOut);
}
} while (movieIn.BaseStream.Position < endPosition);
}
