public static void FromStream(Stream source, MetaDataIO meta, ReadTagParams readTagParams)
{
string str;
byte[] data = new byte[256];
// Description
source.Read(data, 0, 256);
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.description", str, readTagParams.ReadAllMetaFrames);
}
// Originator
source.Read(data, 0, 32);
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data, 0, 32).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.originator", str, readTagParams.ReadAllMetaFrames);
}
// OriginatorReference
source.Read(data, 0, 32);
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data, 0, 32).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.originatorReference", str, readTagParams.ReadAllMetaFrames);
}
// OriginationDate
source.Read(data, 0, 10);
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data, 0, 10).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.originationDate", str, readTagParams.ReadAllMetaFrames);
}
// OriginationTime
source.Read(data, 0, 8);
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data, 0, 8).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.originationTime", str, readTagParams.ReadAllMetaFrames);
}
// TimeReference
source.Read(data, 0, 8);
ulong timeReference = StreamUtils.DecodeUInt64(data);
meta.SetMetaField("bext.timeReference", timeReference.ToString(), readTagParams.ReadAllMetaFrames);
// BEXT version
source.Read(data, 0, 2);
int intData = StreamUtils.DecodeUInt16(data);
meta.SetMetaField("bext.version", intData.ToString(), readTagParams.ReadAllMetaFrames);
// UMID
source.Read(data, 0, 64);
str = "";
int usefulLength = 32; // "basic" UMID
if (data[12] > 19)
{
usefulLength = 64; // data[12] gives the size of remaining UMID
}
for (int i = 0; i < usefulLength; i++)
{
str = str + data[i].ToString("X2");
}
meta.SetMetaField("bext.UMID", str, readTagParams.ReadAllMetaFrames);
// LoudnessValue
source.Read(data, 0, 2);
intData = StreamUtils.DecodeInt16(data);
meta.SetMetaField("bext.loudnessValue", (intData / 100.0).ToString(), readTagParams.ReadAllMetaFrames);
// LoudnessRange
source.Read(data, 0, 2);
intData = StreamUtils.DecodeInt16(data);
meta.SetMetaField("bext.loudnessRange", (intData / 100.0).ToString(), readTagParams.ReadAllMetaFrames);
// MaxTruePeakLevel
source.Read(data, 0, 2);
intData = StreamUtils.DecodeInt16(data);
meta.SetMetaField("bext.maxTruePeakLevel", (intData / 100.0).ToString(), readTagParams.ReadAllMetaFrames);
// MaxMomentaryLoudness
source.Read(data, 0, 2);
intData = StreamUtils.DecodeInt16(data);
meta.SetMetaField("bext.maxMomentaryLoudness", (intData / 100.0).ToString(), readTagParams.ReadAllMetaFrames);
// MaxShortTermLoudness
source.Read(data, 0, 2);
intData = StreamUtils.DecodeInt16(data);
meta.SetMetaField("bext.maxShortTermLoudness", (intData / 100.0).ToString(), readTagParams.ReadAllMetaFrames);
// Reserved
source.Seek(180, SeekOrigin.Current);
// CodingHistory
long initialPos = source.Position;
if (StreamUtils.FindSequence(source, new byte[2] {
13, 10
} /* CR LF */))
{
long endPos = source.Position - 2;
source.Seek(initialPos, SeekOrigin.Begin);
if (data.Length < (int)(endPos - initialPos))
{
data = new byte[(int)(endPos - initialPos)];
}
source.Read(data, 0, (int)(endPos - initialPos));
str = Utils.StripEndingZeroChars(Utils.Latin1Encoding.GetString(data, 0, (int)(endPos - initialPos)).Trim());
if (str.Length > 0)
{
meta.SetMetaField("bext.codingHistory", str, readTagParams.ReadAllMetaFrames);
}
}
}
// ---------- SUPPORT METHODS
private bool readWAV(Stream source, ReadTagParams readTagParams)
{
bool result = true;
uint riffChunkSize;
long riffChunkSizePos;
byte[] data = new byte[4];
source.Seek(0, SeekOrigin.Begin);
// Read header
source.Read(data, 0, 4);
string str = Utils.Latin1Encoding.GetString(data);
if (str.Equals(HEADER_RIFF))
{
_isLittleEndian = true;
}
else if (str.Equals(HEADER_RIFX))
{
_isLittleEndian = false;
}
else
{
return(false);
}
// Force creation of FileStructureHelper with detected endianness
structureHelper = new FileStructureHelper(isLittleEndian);
id3v2StructureHelper = new FileStructureHelper(isLittleEndian);
riffChunkSizePos = source.Position;
source.Read(data, 0, 4);
if (isLittleEndian)
{
riffChunkSize = StreamUtils.DecodeUInt32(data);
}
else
{
riffChunkSize = StreamUtils.DecodeBEUInt32(data);
}
// Format code
source.Read(data, 0, 4);
str = Utils.Latin1Encoding.GetString(data);
if (!str.Equals(FORMAT_WAVE))
{
return(false);
}
string subChunkId;
uint chunkSize;
long chunkDataPos;
bool foundSample = false;
bool foundBext = false;
bool foundInfo = false;
bool foundIXml = false;
// Sub-chunks loop
while (source.Position < riffChunkSize + 8)
{
// Chunk ID
source.Read(data, 0, 4);
if (0 == data[0]) // Sometimes data segment ends with a parasite null byte
{
source.Seek(-3, SeekOrigin.Current);
source.Read(data, 0, 4);
}
subChunkId = Utils.Latin1Encoding.GetString(data);
// Chunk size
source.Read(data, 0, 4);
if (isLittleEndian)
{
chunkSize = StreamUtils.DecodeUInt32(data);
}
else
{
chunkSize = StreamUtils.DecodeBEUInt32(data);
}
chunkDataPos = source.Position;
if (subChunkId.Equals(CHUNK_FORMAT))
{
source.Read(data, 0, 2);
if (isLittleEndian)
{
formatId = StreamUtils.DecodeUInt16(data);
}
else
{
formatId = StreamUtils.DecodeBEUInt16(data);
}
source.Read(data, 0, 2);
if (isLittleEndian)
{
channelsArrangement = ChannelsArrangements.GuessFromChannelNumber(StreamUtils.DecodeUInt16(data));
}
else
{
channelsArrangement = ChannelsArrangements.GuessFromChannelNumber(StreamUtils.DecodeBEUInt16(data));
}
source.Read(data, 0, 4);
if (isLittleEndian)
{
sampleRate = StreamUtils.DecodeUInt32(data);
}
else
{
sampleRate = StreamUtils.DecodeBEUInt32(data);
}
source.Read(data, 0, 4);
if (isLittleEndian)
{
bytesPerSecond = StreamUtils.DecodeUInt32(data);
}
else
{
bytesPerSecond = StreamUtils.DecodeBEUInt32(data);
}
source.Seek(2, SeekOrigin.Current); // BlockAlign
source.Read(data, 0, 2);
if (isLittleEndian)
{
bitsPerSample = StreamUtils.DecodeUInt16(data);
}
else
{
bitsPerSample = StreamUtils.DecodeBEUInt16(data);
}
}
else if (subChunkId.Equals(CHUNK_DATA))
{
headerSize = riffChunkSize - chunkSize;
}
else if (subChunkId.Equals(CHUNK_FACT))
{
source.Read(data, 0, 4);
if (isLittleEndian)
{
sampleNumber = StreamUtils.DecodeInt32(data);
}
else
{
sampleNumber = StreamUtils.DecodeBEInt32(data);
}
}
else if (subChunkId.Equals(CHUNK_SAMPLE))
{
structureHelper.AddZone(source.Position - 8, (int)(chunkSize + 8), subChunkId);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, subChunkId);
foundSample = true;
tagExists = true;
SampleTag.FromStream(source, this, readTagParams);
}
else if (subChunkId.Equals(CHUNK_BEXT))
{
structureHelper.AddZone(source.Position - 8, (int)(chunkSize + 8), subChunkId);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, subChunkId);
foundBext = true;
tagExists = true;
BextTag.FromStream(source, this, readTagParams);
}
else if (subChunkId.Equals(CHUNK_INFO))
{
// Purpose of the list should be INFO
source.Read(data, 0, 4);
string purpose = Utils.Latin1Encoding.GetString(data, 0, 4);
if (purpose.Equals(InfoTag.PURPOSE_INFO))
{
structureHelper.AddZone(source.Position - 12, (int)(chunkSize + 8), subChunkId);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, subChunkId);
foundInfo = true;
tagExists = true;
InfoTag.FromStream(source, this, readTagParams, chunkSize);
}
}
else if (subChunkId.Equals(CHUNK_IXML))
{
structureHelper.AddZone(source.Position - 8, (int)(chunkSize + 8), subChunkId);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, subChunkId);
foundIXml = true;
tagExists = true;
IXmlTag.FromStream(source, this, readTagParams, chunkSize);
}
else if (subChunkId.Equals(CHUNK_ID3))
{
id3v2Offset = source.Position;
// Zone is already added by Id3v2.Read
id3v2StructureHelper.AddZone(id3v2Offset - 8, (int)(chunkSize + 8), subChunkId);
id3v2StructureHelper.AddSize(riffChunkSizePos, riffChunkSize, subChunkId);
}
source.Seek(chunkDataPos + chunkSize, SeekOrigin.Begin);
}
// Add zone placeholders for future tag writing
if (readTagParams.PrepareForWriting)
{
if (!foundSample)
{
structureHelper.AddZone(source.Position, 0, CHUNK_SAMPLE);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, CHUNK_SAMPLE);
}
if (!foundBext)
{
structureHelper.AddZone(source.Position, 0, CHUNK_BEXT);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, CHUNK_BEXT);
}
if (!foundInfo)
{
structureHelper.AddZone(source.Position, 0, CHUNK_INFO);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, CHUNK_INFO);
}
if (!foundIXml)
{
structureHelper.AddZone(source.Position, 0, CHUNK_IXML);
structureHelper.AddSize(riffChunkSizePos, riffChunkSize, CHUNK_IXML);
}
}
// ID3 zone should be set as the very last one for Windows to be able to read the LIST INFO zone properly
if (-1 == id3v2Offset)
{
id3v2Offset = 0; // Switch status to "tried to read, but nothing found"
if (readTagParams.PrepareForWriting)
{
id3v2StructureHelper.AddZone(source.Position, 0, CHUNK_ID3);
id3v2StructureHelper.AddSize(riffChunkSizePos, riffChunkSize, CHUNK_ID3);
}
}
return(result);
}
public void StreamUtils_Exceptions()
{
Assert.IsFalse(StreamUtils.ArrEqualsArr(new byte[1], new byte[2]));
Assert.IsFalse(StreamUtils.StringEqualsArr(".", new char[2]));
try
{
StreamUtils.DecodeBEUInt16(new byte[1]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeUInt16(new byte[1]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeInt16(new byte[1]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEInt16(new byte[1]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEInt24(new byte[2]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEUInt24(new byte[2]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.EncodeBEUInt24(0x01FFFFFF);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEUInt32(new byte[3]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeUInt32(new byte[3]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEInt32(new byte[3]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeInt32(new byte[3]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeUInt64(new byte[7]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeBEInt64(new byte[7]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeSynchSafeInt(new byte[6]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.DecodeSynchSafeInt32(new byte[6]);
Assert.Fail();
}
catch { }
try
{
StreamUtils.EncodeSynchSafeInt(1, 0);
Assert.Fail();
}
catch { }
try
{
StreamUtils.EncodeSynchSafeInt(1, 6);
Assert.Fail();
}
catch { }
try
{
StreamUtils.ReadBits(new BinaryReader(new MemoryStream()), 0, 0);
Assert.Fail();
}
catch { }
try
{
StreamUtils.ReadBits(new BinaryReader(new MemoryStream()), 0, 33);
Assert.Fail();
}
catch { }
}