bool ParseVersion3(DataFrameReader reader)
{
if (!reader.EnsureBuffer(4))
{
return false;
}
// calc size
byte[] sizeBytes = reader.Read(0, 4);
int size = 0;
for (int i = 0; i < 4; i++)
{
size = (size << 8) | sizeBytes[i];
}
size += 4;
// get data
if (!reader.EnsureBuffer(size))
{
return false;
}
m_Data = reader.GetBuffer(size);
// get flags
m_Flags = ID3v2ExtendedHeaderFlags.FromID3v23(m_Data);
return true;
}
/// <summary>
/// Parses the specified buffer starting at index to load all data for this frame.
/// </summary>
/// <param name="reader">FrameReader to read from.</param>
public override bool Parse(DataFrameReader reader)
{
if (reader == null)
{
throw new ArgumentNullException("Stream");
}
m_Flags = new ID3v2ExtendedHeaderFlags();
switch (m_Header.Version)
{
case 2: return ParseVersion2(reader);
case 3: return ParseVersion3(reader);
case 4: return ParseVersion4(reader);
default: return false;
}
}
bool ParseVersion4(DataFrameReader reader)
{
if (!reader.EnsureBuffer(4))
{
return false;
}
// calc size
int size = ID3v2DeUnsync.Int32(reader.Read(0, 4), 0);
// get data
if (!reader.EnsureBuffer(size))
{
return false;
}
m_Data = reader.GetBuffer(size);
// get flags
m_Flags = ID3v2ExtendedHeaderFlags.FromID3v24(m_Data);
return true;
}
