public override void Read(Tag tag, Reader reader)
{
header.Read(reader);
tag.DescriptionMap = TagDescriptionMap.Instance[
Version.VersionByMajorMinor(header.VersionMajor, header.VersionMinor)];
if (header.size > 1)
{
long bytesToRead = header.size;
bool invalidPadding = false;
try
{
while (bytesToRead > 0 &&
reader.PeekChar() != 0 &&
reader.PeekChar() != -1 &&
!invalidPadding)
{
long pos0 = reader.Position;
long numBytesRead = ReadFrame(tag, reader);
long pos1 = reader.Position;
if (numBytesRead == -1)
{
// Invalid but known padding (e.g. MP3e)
invalidPadding = true;
}
bytesToRead -= (pos1 - pos0);
}
if (!invalidPadding && bytesToRead < 0)
{
throw new Exception(GetType().Name + ": Read failed");
}
}
catch (VersionInvariant e)
{
throw e;
}
catch (InvalidHeaderFlagsException e)
{
reader.HandleException(e);
}
catch (InvalidFrameException e)
{
reader.HandleException(e);
}
catch (NotSupportedException e)
{
reader.HandleException(e);
}
}
}
private static void TestHeaderV2()
{
HeaderV2 header = new HeaderV2();
header.IgnoreUnsupportedFlags = true;
byte[] data =
{
// File identificator
(byte)'I', (byte)'D', (byte)'3',
// Version
3, 0,
// Flags
0xE0,
// Size
0, 0, 0, 0
};
using (Reader reader = new Reader(data))
{
header.Read(reader);
header.CheckVersion(Version.v2_3);
}
UnitTest.Test(header.HeaderSize == 10);
UnitTest.Test(header.VersionMajor == 3);
UnitTest.Test(header.VersionMinor == 0);
UnitTest.Test(header.IsUnsynchronized);
UnitTest.Test(header.HasExtendedHeader);
UnitTest.Test(header.HasExperimentalStage);
using (Writer writer = new Writer())
{
header.Write(writer);
UnitTest.Test(ArrayUtils.IsEqual(writer.OutData, data));
}
}