protected void Read(File file)
{
if (file == null)
return;
try
{
file.Mode = FileAccessMode.Read;
}
catch (TagLibException)
{ return; }
file.Seek(tagOffset);
footer.SetData(file.ReadBlock((int)ApeFooter.Size));
if (footer.TagSize == 0 || footer.TagSize > (uint)file.Length)
return;
file.Seek(tagOffset + ApeFooter.Size - footer.TagSize);
Parse(file.ReadBlock((int)(footer.TagSize - ApeFooter.Size)));
}
public Mpeg4IsoSampleEntry(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
File.Seek(base.DataPosition + 6);
dataReferenceIndex = (ushort)File.ReadBlock(2).ToShort();
}
public Mpeg4IsoMovieHeaderBox(Mpeg4BoxHeader header, Mpeg4Box parent) : base(header, parent)
{
// Size depends on version.
boxSize = Version == 1 ? 108 : 96;
// Get everything.
File.Seek(base.DataPosition);
ByteVector data = File.ReadBlock(boxSize);
int pos = 0;
// Read version one (large integers).
if (Version == 1)
{
if (data.Count >= pos + 8)
{
creationTime = (ulong)data.Mid(pos, 8).ToLong();
}
pos += 8;
if (data.Count >= pos + 8)
{
modificationTime = (ulong)data.Mid(pos, 8).ToLong();
}
pos += 8;
if (data.Count >= pos + 4)
{
timescale = data.Mid(pos, 4).ToUInt();
}
pos += 4;
if (data.Count >= pos + 8)
{
duration = (ulong)data.Mid(pos, 8).ToLong();
}
pos += 8;
}
// Read version zero (normal integers).
else
{
if (data.Count >= pos + 4)
{
creationTime = data.Mid(pos, 4).ToUInt();
}
pos += 4;
if (data.Count >= pos + 4)
{
modificationTime = data.Mid(pos, 4).ToUInt();
}
pos += 4;
if (data.Count >= pos + 4)
{
timescale = data.Mid(pos, 4).ToUInt();
}
pos += 4;
if (data.Count >= pos + 4)
{
duration = (ulong)data.Mid(pos, 4).ToUInt();
}
pos += 4;
}
// Get rate
if (data.Count >= pos + 4)
{
rate = data.Mid(pos, 4).ToUInt();
}
pos += 4;
// Get volume
if (data.Count >= pos + 2)
{
volume = (ushort)data.Mid(pos, 2).ToShort();
}
pos += 2;
// reserved
pos += 2;
// reserved
pos += 8;
// video transformation matrix
pos += 36;
// pre-defined
pos += 24;
// Get next track ID
if (data.Count >= pos + 4)
{
nextTrackId = (ushort)data.Mid(pos, 4).ToUInt();
}
}