private void Parse(ByteVector data)
{
String currentKey, currentValue;
int keyLen, valueLen;
try
{
do
{
keyLen = (int)data.ToUInt(true);
data.RemoveRange(0, 4);
valueLen = (int)data.ToUInt(true);
data.RemoveRange(0, 4);
currentKey = data.ToString(TagLib.StringType.UTF8, 0, keyLen);
data.RemoveRange(0, keyLen);
currentValue = data.ToString(TagLib.StringType.UTF8, 0, valueLen);
data.RemoveRange(0, valueLen);
tags.Add(new KeyValuePair <string, string>(currentKey, currentValue));
if (data.Count != 0)
{
data.RemoveRange(0, 1);
}
}while(data.Count >= 4);
}
catch (Exception)
{
}
if (data.Count != 0)
{
throw new CorruptFileException();
}
}
protected override void ParseFields(ByteVector data,
byte version)
{
if (data.Count < 4)
{
throw new CorruptFileException(
"An object frame must contain at least 4 bytes.");
}
int start = 0;
text_encoding = (StringType)data [start++];
int end = data.Find(
ByteVector.TextDelimiter(StringType.Latin1),
start);
if (end < start)
{
return;
}
mime_type = data.ToString(StringType.Latin1, start,
end - start);
ByteVector delim = ByteVector.TextDelimiter(
text_encoding);
start = end + 1;
end = data.Find(delim, start, delim.Count);
if (end < start)
{
return;
}
file_name = data.ToString(text_encoding, start,
end - start);
start = end + delim.Count;
end = data.Find(delim, start, delim.Count);
if (end < start)
{
return;
}
description = data.ToString(text_encoding, start,
end - start);
start = end + delim.Count;
data.RemoveRange(0, start);
this.data = data;
}
/// <summary>
/// Populates the current instance by parsing the contents of
/// a raw AudibleMetadata tag.
/// </summary>
/// <param name="data">
/// A <see cref="ByteVector" /> object containing the whole tag
/// object
/// </param>
/// <exception cref="CorruptFileException">
/// <paramref name="data" /> is less than 128 bytes or does
/// not start with <see cref="FileIdentifier" />.
/// </exception>
private void Parse(ByteVector data)
{
String currentKey, currentValue;
int keyLen, valueLen;
try
{
do
{
keyLen = (int)data.ToUInt(true);
data.RemoveRange(0, 4);
valueLen = (int)data.ToUInt(true);
data.RemoveRange(0, 4);
currentKey = data.ToString(TagLib.StringType.UTF8, 0, keyLen);
data.RemoveRange(0, keyLen);
currentValue = data.ToString(TagLib.StringType.UTF8, 0, valueLen);
data.RemoveRange(0, valueLen);
tags.Add(new KeyValuePair <string, string>(currentKey, currentValue));
//StringHandle (currentKey, currentValue);
// if it is not the last item remove the end byte (null terminated)
if (data.Count != 0)
{
data.RemoveRange(0, 1);
}
}while (data.Count >= 4);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e);
//
}
if (data.Count != 0)
{
throw new CorruptFileException();
}
}
protected void ParseRawData()
{
if (raw_data == null)
{
return;
}
int pos = 0;
int offset;
text_encoding = (StringType)raw_data[pos++];
if (raw_version > 2)
{
offset = raw_data.Find(ByteVector.TextDelimiter(StringType.Latin1), pos);
if (offset < pos)
{
return;
}
mime_type = raw_data.ToString(StringType.Latin1, pos, offset - pos);
pos = offset + 1;
}
else
{
ByteVector ext = raw_data.Mid(pos, 3);
if (ext == "JPG")
{
mime_type = "image/jpeg";
}
else if (ext == "PNG")
{
mime_type = "image/png";
}
else
{
mime_type = "image/unknown";
}
pos += 3;
}
ByteVector delim = ByteVector.TextDelimiter(text_encoding);
type = (PictureType)raw_data[pos++];
offset = raw_data.Find(delim, pos, delim.Count);
if (offset < pos)
{
return;
}
description = raw_data.ToString(text_encoding, pos, offset - pos);
pos = offset + delim.Count;
raw_data.RemoveRange(0, pos);
this.data = raw_data;
this.raw_data = null;
}
/// <summary>
/// Performs the actual parsing of the raw data.
/// </summary>
/// <remarks>
/// Because of the high parsing cost and relatively low usage
/// of the class, <see cref="ParseFields" /> only stores the
/// field data so it can be parsed on demand. Whenever a
/// property or method is called which requires the data,
/// this method is called, and only on the first call does it
/// actually parse the data.
/// </remarks>
protected void ParseRawData()
{
if (file != null)
{
Load();
}
if (raw_data == null)
{
return;
}
data = raw_data;
raw_data = null;
int pos = 0;
int offset;
encoding = (StringType)data[pos++];
ByteVector delim = ByteVector.TextDelimiter(encoding);
if (header.FrameId == FrameType.APIC)
{
// Retrieve an ID3v2 Attached Picture (APIC)
if (raw_version > 2)
{
offset = data.Find(ByteVector.TextDelimiter(StringType.Latin1), pos);
if (offset < pos)
{
return;
}
mime_type = data.ToString(StringType.Latin1, pos, offset - pos);
pos = offset + 1;
}
else
{
ByteVector ext = data.Mid(pos, 3);
mime_type = Picture.GetMimeFromExtension(ext.ToString());
pos += 3;
}
Type = (PictureType)data[pos++];
offset = data.Find(delim, pos, delim.Count);
}
else if (header.FrameId == FrameType.GEOB)
{
// Retrieve an ID3v2 General Encapsulated Object (GEOB)
offset = data.Find(ByteVector.TextDelimiter(StringType.Latin1), pos);
if (offset < pos)
{
return;
}
mime_type = data.ToString(StringType.Latin1, pos, offset - pos);
pos = offset + 1;
offset = data.Find(delim, pos, delim.Count);
if (offset < pos)
{
return;
}
filename = data.ToString(encoding, pos, offset - pos);
pos = offset + delim.Count;
offset = data.Find(delim, pos, delim.Count);
Type = PictureType.NotAPicture;
}
else
{
throw new InvalidOperationException("Bad Frame type");
}
if (offset < pos)
{
return;
}
description = data.ToString(encoding, pos, offset - pos);
pos = offset + delim.Count;
data.RemoveRange(0, pos);
}
protected override void ParseFields(ByteVector data, byte version)
{
if (data.Count < 4)
{
throw new CorruptFileException("An object frame must contain at least 4 bytes.");
}
int offset = 0;
this.encoding = (StringType) data[offset++];
int num2 = data.Find(ByteVector.TextDelimiter(StringType.Latin1), offset);
if (num2 >= offset)
{
this.mime_type = data.ToString(StringType.Latin1, offset, num2 - offset);
ByteVector pattern = ByteVector.TextDelimiter(this.encoding);
offset = num2 + 1;
num2 = data.Find(pattern, offset, pattern.Count);
if (num2 >= offset)
{
this.file_name = data.ToString(this.encoding, offset, num2 - offset);
offset = num2 + pattern.Count;
num2 = data.Find(pattern, offset, pattern.Count);
if (num2 >= offset)
{
this.description = data.ToString(this.encoding, offset, num2 - offset);
offset = num2 + pattern.Count;
data.RemoveRange(0, offset);
this.data = data;
}
}
}
}
/// <summary>
/// Populates the values in the current instance by parsing
/// its field data in a specified version.
/// </summary>
/// <param name="data">
/// A <see cref="ByteVector" /> object containing the
/// extracted field data.
/// </param>
/// <param name="version">
/// A <see cref="byte" /> indicating the ID3v2 version the
/// field data is encoded in.
/// </param>
/// <exception cref="CorruptFileException">
/// <paramref name="data" /> contains less than 5 bytes.
/// </exception>
protected override void ParseFields(ByteVector data,
byte version)
{
if (data.Count < 4)
throw new CorruptFileException (
"An object frame must contain at least 4 bytes.");
int start = 0;
encoding = (StringType) data [start++];
int end = data.Find (
ByteVector.TextDelimiter (StringType.Latin1),
start);
if (end < start)
return;
mime_type = data.ToString (StringType.Latin1, start,
end - start);
ByteVector delim = ByteVector.TextDelimiter (
encoding);
start = end + 1;
end = data.Find (delim, start, delim.Count);
if (end < start)
return;
file_name = data.ToString (encoding, start,
end - start);
start = end + delim.Count;
end = data.Find (delim, start, delim.Count);
if (end < start)
return;
description = data.ToString (encoding, start,
end - start);
start = end + delim.Count;
data.RemoveRange (0, start);
this.data = data;
}
/// <summary>
/// Populates the current instance by parsing the contents of
/// a raw AudibleMetadata tag.
/// </summary>
/// <param name="data">
/// A <see cref="ByteVector" /> object containing the whole tag
/// object
/// </param>
/// <exception cref="CorruptFileException">
/// <paramref name="data" /> is less than 128 bytes or does
/// not start with <see cref="FileIdentifier" />.
/// </exception>
private void Parse (ByteVector data)
{
String currentKey, currentValue;
int keyLen, valueLen;
try
{
do
{
keyLen = (int) data.ToUInt(true);
data.RemoveRange (0, 4);
valueLen = (int) data.ToUInt(true);
data.RemoveRange (0, 4);
currentKey = data.ToString ( TagLib.StringType.UTF8, 0, keyLen );
data.RemoveRange (0, keyLen);
currentValue = data.ToString ( TagLib.StringType.UTF8, 0, valueLen );
data.RemoveRange (0, valueLen);
tags.Add( new KeyValuePair<string, string>(currentKey, currentValue) );
//StringHandle (currentKey, currentValue);
// if it is not the last item remove the end byte (null terminated)
if (data.Count != 0)
data.RemoveRange(0,1);
}
while (data.Count >= 4);
}
catch (Exception)
{
//
}
if (data.Count != 0)
throw new CorruptFileException();
}
