/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="HeaderExtensionObject" /> by reading the contents
/// from a specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object containing the file from
/// which the contents of the new instance are to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the object.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="file" /> is <see langref="null" />.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="position" /> is less than zero or greater
/// than the size of the file.
/// </exception>
/// <exception cref="CorruptFileException">
/// The object read from disk does not have the correct GUID
/// or contents.
/// </exception>
public HeaderExtensionObject (Asf.File file, long position)
: base (file, position)
{
if (!Guid.Equals (Asf.Guid.AsfHeaderExtensionObject))
throw new CorruptFileException (
"Object GUID incorrect.");
if (file.ReadGuid () != Asf.Guid.AsfReserved1)
throw new CorruptFileException (
"Reserved1 GUID expected.");
if (file.ReadWord () != 6)
throw new CorruptFileException (
"Invalid reserved WORD. Expected '6'.");
uint size_remaining = file.ReadDWord ();
position += 0x170 / 8;
while (size_remaining > 0) {
Object obj = file.ReadObject (position);
position += (long) obj.OriginalSize;
size_remaining -= (uint) obj.OriginalSize;
children.Add (obj);
}
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="Object" /> by reading the contents from a
/// specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object containing the file from
/// which the contents of the new instance are to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the object.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="file" /> is <see langword="null" />.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="position" /> is less than zero or greater
/// than the size of the file.
/// </exception>
protected Object (Asf.File file, long position)
{
if (file == null)
throw new ArgumentNullException ("file");
if (position < 0 ||
position > file.Length - 24)
throw new ArgumentOutOfRangeException (
"position");
file.Seek (position);
id = file.ReadGuid ();
size = file.ReadQWord ();
}
/// <summary>
/// Populates the current instance by reading in the contents
/// from a file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object to read the raw ASF
/// Description Record from.
/// </param>
/// <returns>
/// <see langword="true" /> if the data was read correctly.
/// Otherwise <see langword="false" />.
/// </returns>
protected bool Parse (Asf.File file)
{
// Field name Field type Size (bits)
// Language List Index WORD 16
// Stream Number WORD 16
// Name Length WORD 16
// Data Type WORD 16
// Data Length DWORD 32
// Name WCHAR varies
// Data See below varies
lang_list_index = file.ReadWord ();
stream_number = file.ReadWord ();
ushort name_length = file.ReadWord ();
type = (DataType) file.ReadWord ();
int data_length = (int) file.ReadDWord ();
name = file.ReadUnicode (name_length);
switch (type)
{
case DataType.Word:
longValue = file.ReadWord ();
break;
case DataType.Bool:
case DataType.DWord:
longValue = file.ReadDWord ();
break;
case DataType.QWord:
longValue = file.ReadQWord ();
break;
case DataType.Unicode:
strValue = file.ReadUnicode (data_length);
break;
case DataType.Bytes:
byteValue = file.ReadBlock (data_length);
break;
case DataType.Guid:
guidValue = file.ReadGuid ();
break;
default:
return false;
}
return true;
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="FilePropertiesObject" /> by reading the contents
/// from a specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object containing the file from
/// which the contents of the new instance are to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the object.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="file" /> is <see langref="null" />.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="position" /> is less than zero or greater
/// than the size of the file.
/// </exception>
/// <exception cref="CorruptFileException">
/// The object read from disk does not have the correct GUID
/// or smaller than the minimum size.
/// </exception>
public FilePropertiesObject (Asf.File file, long position)
: base (file, position)
{
if (!Guid.Equals (Asf.Guid.AsfFilePropertiesObject))
throw new CorruptFileException (
"Object GUID incorrect.");
if (OriginalSize < 104)
throw new CorruptFileException (
"Object size too small.");
file_id = file.ReadGuid ();
file_size = file.ReadQWord ();
creation_date = file.ReadQWord ();
data_packets_count = file.ReadQWord ();
send_duration = file.ReadQWord ();
play_duration = file.ReadQWord ();
preroll = file.ReadQWord ();
flags = file.ReadDWord ();
minimum_data_packet_size = file.ReadDWord ();
maximum_data_packet_size = file.ReadDWord ();
maximum_bitrate = file.ReadDWord ();
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="PaddingObject" /> by reading the contents from a
/// specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object containing the file from
/// which the contents of the new instance are to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the object.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="file" /> is <see langref="null" />.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="position" /> is less than zero or greater
/// than the size of the file.
/// </exception>
/// <exception cref="CorruptFileException">
/// The object read from disk does not have the correct GUID
/// or smaller than the minimum size.
/// </exception>
public StreamPropertiesObject (Asf.File file, long position)
: base (file, position)
{
if (!Guid.Equals (Asf.Guid.AsfStreamPropertiesObject))
throw new CorruptFileException (
"Object GUID incorrect.");
if (OriginalSize < 78)
throw new CorruptFileException (
"Object size too small.");
stream_type = file.ReadGuid ();
error_correction_type = file.ReadGuid ();
time_offset = file.ReadQWord ();
int type_specific_data_length = (int) file.ReadDWord ();
int error_correction_data_length = (int)
file.ReadDWord ();
flags = file.ReadWord ();
reserved = file.ReadDWord ();
type_specific_data =
file.ReadBlock (type_specific_data_length);
error_correction_data =
file.ReadBlock (error_correction_data_length);
}
