public void ReadStream(Stream stream)
{
if (Utils.ReadString(EncodingType.ISO88591, stream, 3) == "ID3")
{
int num2;
int num3;
this.m_ID3v2Header = new ID3v2Header(stream, false);
TagReadingInfo info1 = new TagReadingInfo(this.m_ID3v2Header.TagVersion);
if (this.m_ID3v2Header.UsesUnsynchronization)
{
info1.TagVersionOptions = TagVersionOptions.Unsynchronized;
}
else
{
info1.TagVersionOptions = TagVersionOptions.None;
}
if (this.m_ID3v2Header.HasExtendedHeader)
{
this.m_ID3v2ExtendedHeader = new ID3v2ExtendedHeader(info1, stream);
}
int num1 = (info1.TagVersion == ID3v2TagVersion.ID3v22) ? 3 : 4;
if (this.m_ID3v2Header.TagVersion != ID3v2TagVersion.ID3v24)
{
if (this.m_ID3v2Header.TagVersion == ID3v2TagVersion.ID3v22)
{
bool flag4 = true;
num2 = 0;
num3 = (this.m_ID3v2Header.TagSize - this.m_ID3v2ExtendedHeader.SizeIncludingSizeBytes) - num1;
long num8 = stream.Position;
Utils.Read(stream, num1);
UnknownFrame frame1 = new UnknownFrame(null, info1, stream);
num2 += frame1.FrameHeader.FrameSizeTotal;
if (num2 < num3)
{
byte[] buffer2 = Utils.Read(stream, num1);
if (((buffer2[0] < 0x30) || (buffer2[0] > 90)) && (((buffer2[1] >= 0x30) && (buffer2[1] <= 90)) && ((buffer2[2] >= 0x30) && (buffer2[2] <= 90))))
{
Trace.WriteLine("ID3v2.2 frame size off by 1 byte");
flag4 = false;
}
}
stream.Position = num8;
if (!flag4)
{
info1.TagVersionOptions |= TagVersionOptions.AddOneByteToSize;
}
}
}
else
{
bool flag1 = true;
num2 = 0;
num3 = (this.m_ID3v2Header.TagSize - this.m_ID3v2ExtendedHeader.SizeIncludingSizeBytes) - num1;
long num4 = stream.Position;
while (num2 < num3)
{
byte[] buffer1 = Utils.Read(stream, num1);
if ((((buffer1[0] < 0x30) || (buffer1[0] > 90)) || ((buffer1[1] < 0x30) || (buffer1[1] > 90))) || (((buffer1[2] < 0x30) || (buffer1[2] > 90)) || ((buffer1[3] < 0x30) || (buffer1[3] > 90))))
{
if ((buffer1[0] != 0) && (buffer1[0] != 0xff))
{
}
break;
}
int num5 = Utils.ReadInt32(stream);
if (num5 > 0xff)
{
if ((num5 & 0x80) == 0x80)
{
flag1 = false;
break;
}
if ((num5 & 0x8000) == 0x8000)
{
flag1 = false;
break;
}
if ((num5 & 0x800000) == 0x800000)
{
flag1 = false;
break;
}
if (((num2 + num5) + 10) == this.m_ID3v2Header.TagSize)
{
flag1 = false;
break;
}
stream.Seek((long) (-4), SeekOrigin.Current);
int num6 = Utils.ReadInt32SyncSafe(stream);
long num7 = stream.Position;
bool flag2 = true;
bool flag3 = true;
if (((num7 + num5) + 2) >= num3)
{
flag1 = true;
break;
}
stream.Seek((num7 + num5) + 2, SeekOrigin.Begin);
buffer1 = Utils.Read(stream, num1);
if ((((buffer1[0] < 0x30) || (buffer1[0] > 90)) || ((buffer1[1] < 0x30) || (buffer1[1] > 90))) || (((buffer1[2] < 0x30) || (buffer1[2] > 90)) || ((buffer1[3] < 0x30) || (buffer1[3] > 90))))
{
flag3 = false;
}
stream.Seek((num7 + num6) + 2, SeekOrigin.Begin);
buffer1 = Utils.Read(stream, num1);
if ((((buffer1[0] < 0x30) || (buffer1[0] > 90)) || ((buffer1[1] < 0x30) || (buffer1[1] > 90))) || (((buffer1[2] < 0x30) || (buffer1[2] > 90)) || ((buffer1[3] < 0x30) || (buffer1[3] > 90))))
{
flag2 = false;
}
if (flag3 != flag2)
{
flag1 = flag2;
}
break;
}
stream.Seek((long) (num5 + 2), SeekOrigin.Current);
num2 += num5 + 10;
}
stream.Position = num4;
if (!flag1)
{
info1.TagVersionOptions |= TagVersionOptions.UseNonSyncSafeFrameSizeID3v24;
}
}
num3 = (this.m_ID3v2Header.TagSize - this.m_ID3v2ExtendedHeader.SizeIncludingSizeBytes) - num1;
base.Read(stream, this.m_ID3v2Header.TagVersion, info1, num3, num1);
}
}
internal void Read(Stream stream, ID3v2TagVersion tagVersion, TagReadingInfo tagReadingInfo, int readUntil, int frameIDSize)
{
Dictionary<string, IBindingList> multipleOccurrenceFrames = GetMultipleOccurrenceFrames(tagVersion);
Dictionary<string, IFrame> singleOccurrenceFrames = GetSingleOccurrenceFrames(tagVersion);
int bytesRead = 0;
while (bytesRead < readUntil)
{
byte[] frameIDBytes = stream.Read(frameIDSize);
// If character is not a letter or number, padding reached, audio began,
// or otherwise the frame is not readable
if (frameIDSize == 4)
{
if (frameIDBytes[0] < 0x30 || frameIDBytes[0] > 0x5A ||
frameIDBytes[1] < 0x30 || frameIDBytes[1] > 0x5A ||
frameIDBytes[2] < 0x30 || frameIDBytes[2] > 0x5A ||
frameIDBytes[3] < 0x30 || frameIDBytes[3] > 0x5A)
{
// TODO: Try to keep reading and look for a valid frame
if (frameIDBytes[0] != 0 && frameIDBytes[0] != 0xFF)
{
string msg = string.Format("Out of range FrameID - 0x{0:X}|0x{1:X}|0x{2:X}|0x{3:X}",
frameIDBytes[0], frameIDBytes[1], frameIDBytes[2], frameIDBytes[3]);
if (ByteUtils.ISO88591GetString(frameIDBytes) != "MP3e")
{
string tmpBadFrameID = ByteUtils.ISO88591GetString(frameIDBytes).TrimEnd('\0');
Trace.WriteLine(msg + " - " + tmpBadFrameID);
}
}
break;
}
}
else if (frameIDSize == 3)
{
if (frameIDBytes[0] < 0x30 || frameIDBytes[0] > 0x5A ||
frameIDBytes[1] < 0x30 || frameIDBytes[1] > 0x5A ||
frameIDBytes[2] < 0x30 || frameIDBytes[2] > 0x5A)
{
// TODO: Try to keep reading and look for a valid frame
if (frameIDBytes[0] != 0 && frameIDBytes[0] != 0xFF)
{
string msg = string.Format("Out of range FrameID - 0x{0:X}|0x{1:X}|0x{2:X}",
frameIDBytes[0], frameIDBytes[1], frameIDBytes[2]);
Trace.WriteLine(msg);
Trace.WriteLine(ByteUtils.ISO88591GetString(frameIDBytes));
}
break;
}
}
string frameID = ByteUtils.ISO88591GetString(frameIDBytes);
// TODO: Take out
//Console.WriteLine(tmpFrameID); // TODO: take out
/*
COMM Frames:
SoundJam_CDDB_TrackNumber
SoundJam_CDDB_1
iTunNORM
iTunSMPB
iTunes_CDDB_IDs
iTunes_CDDB_1
iTunes_CDDB_TrackNumber
*/
IFrame frame;
do
{
IBindingList bindingList;
if (singleOccurrenceFrames.TryGetValue(frameID, out frame))
{
frame.Read(tagReadingInfo, stream);
bytesRead += frame.FrameHeader.FrameSizeTotal;
//m_ReadFrames.Add(tmpFrame);
}
else if (multipleOccurrenceFrames.TryGetValue(frameID, out bindingList))
{
frame = (IFrame)bindingList.AddNew();
frame.Read(tagReadingInfo, stream);
//m_ReadFrames.Add(tmpFrame);
bytesRead += frame.FrameHeader.FrameSizeTotal;
}
else
{
if (tagVersion == ID3v2TagVersion.ID3v24)
{
string newFrameID;
if (_id3v24FrameAliases.TryGetValue(frameID, out newFrameID))
frameID = newFrameID;
else
break;
}
else if (tagVersion == ID3v2TagVersion.ID3v23)
{
string newFrameID;
if (_id3v23FrameAliases.TryGetValue(frameID, out newFrameID))
frameID = newFrameID;
else
break;
}
else
{
break;
}
}
} while (frame == null);
// Frame is unknown
if (frame == null)
{
if (frameID != "NCON" && // non standard (old music match)
frameID != "MJMD" && // Non standard frame (Music Match XML)
frameID != "TT22" && // 000.00 - maybe meant to be 3 letter TT2 frame, and value be 2000.00? still makes no sense
frameID != "PCST" && // null data
frameID != "TCAT" && // category (ie, comedy) (distorted view)
frameID != "TKWD" && // looks like blog tags "comedy funny weird", etc (distorted view)
frameID != "TDES" && // xml file - used by distortedview.com
frameID != "TGID" && // url (from distortedview)
frameID != "WFED" && // url (thanks distortedview)
frameID != "CM1" && // some kind of comment, seen in ID3v2.2
frameID != "TMB" && // ripped by something other, not in spec
frameID != "RTNG" &&
frameID != "XDOR" && // year
frameID != "XSOP" && // looks like artist, "Allman Brothers Band, The"
frameID != "TENK") // itunes encoder (todo: add alias?)
{
/*String msg = String.Format("Unrecognized FrameID '{0}' (not critical)", tmpFrameID);
Trace.WriteLine(msg);*/
}
UnknownFrame unknownFrame = new UnknownFrame(frameID, tagReadingInfo, stream);
_unknownFrames.Add(unknownFrame);
//m_ReadFrames.Add(tmpUNKN);
bytesRead += unknownFrame.FrameHeader.FrameSizeTotal;
}
}
// Process iTunes comments
foreach (var comment in new List<IComments>(m_CommentsList))
{
if (comment.Description != null && comment.Description.StartsWith("iTun"))
{
m_CommentsList.Remove(comment);
m_iTunesCommentsList.Add(comment);
}
}
// Process genre // TODO: may need cleanup
if (!string.IsNullOrEmpty(m_Genre.Value))
{
if (m_Genre.Value.StartsWith("("))
{
int closeIndex = m_Genre.Value.IndexOf(')');
if (closeIndex != -1)
{
if (closeIndex != m_Genre.Value.Length - 1)
{
// Take text description
m_Genre.Value = m_Genre.Value.Substring(closeIndex + 1, m_Genre.Value.Length - (closeIndex + 1));
}
else
{
// Lookup genre value
string innerValue = m_Genre.Value.Substring(1, closeIndex - 1);
int innerValueResult;
if (int.TryParse(innerValue, out innerValueResult))
{
if (GenreHelper.GenreByIndex.Length > innerValueResult && innerValueResult >= 0)
{
m_Genre.Value = GenreHelper.GenreByIndex[innerValueResult];
}
else
{
Trace.WriteLine("Unrecognized genre");
}
}
else
{
Trace.WriteLine("Unrecognized genre");
}
}
}
}
}
}
