private void readFrames(BinaryReader source, TagInfo Tag, MetaDataIO.ReadTagParams readTagParams)
{
string frameName;
string strValue;
int frameDataSize;
long valuePosition;
int frameFlags;
source.BaseStream.Seek(Tag.FileSize - Tag.DataShift - Tag.Size, SeekOrigin.Begin);
// Read all stored fields
for (int iterator = 0; iterator < Tag.FrameCount; iterator++)
{
frameDataSize = source.ReadInt32();
frameFlags = source.ReadInt32();
frameName = StreamUtils.ReadNullTerminatedString(source, Utils.Latin1Encoding); // Slightly more permissive than what APE specs indicate in terms of allowed characters ("Space(0x20), Slash(0x2F), Digits(0x30...0x39), Letters(0x41...0x5A, 0x61...0x7A)")
valuePosition = source.BaseStream.Position;
if ((frameDataSize > 0) && (frameDataSize <= 500))
{
/*
* According to spec : "Items are not zero-terminated like in C / C++.
* If there's a zero character, multiple items are stored under the key and the items are separated by zero characters."
*
* => Values have to be splitted
*/
strValue = Utils.StripEndingZeroChars(Encoding.UTF8.GetString(source.ReadBytes(frameDataSize)));
strValue = strValue.Replace('\0', Settings.InternalValueSeparator).Trim();
SetMetaField(frameName.Trim().ToUpper(), strValue, readTagParams.ReadAllMetaFrames);
}
else if (frameDataSize > 0) // Size > 500 => Probably an embedded picture
{
int picturePosition;
PictureInfo.PIC_TYPE picType = decodeAPEPictureType(frameName);
if (picType.Equals(PictureInfo.PIC_TYPE.Unsupported))
{
addPictureToken(getImplementedTagType(), frameName);
picturePosition = takePicturePosition(getImplementedTagType(), frameName);
}
else
{
addPictureToken(picType);
picturePosition = takePicturePosition(picType);
}
if (readTagParams.ReadPictures || readTagParams.PictureStreamHandler != null)
{
// Description seems to be a null-terminated ANSI string containing
// * The frame name
// * A byte (0x2E)
// * The picture type (3 characters; similar to the 2nd part of the mime-type)
String description = StreamUtils.ReadNullTerminatedString(source, Utils.Latin1Encoding);
ImageFormat imgFormat = ImageUtils.GetImageFormatFromMimeType(description.Substring(description.Length - 3, 3));
PictureInfo picInfo = new PictureInfo(imgFormat, picType, getImplementedTagType(), frameName, picturePosition);
picInfo.Description = description;
picInfo.PictureData = new byte[frameDataSize - description.Length - 1];
source.BaseStream.Read(picInfo.PictureData, 0, frameDataSize - description.Length - 1);
tagData.Pictures.Add(picInfo);
if (readTagParams.PictureStreamHandler != null)
{
MemoryStream mem = new MemoryStream(picInfo.PictureData);
readTagParams.PictureStreamHandler(ref mem, picInfo.PicType, picInfo.NativeFormat, picInfo.TagType, picInfo.NativePicCode, picInfo.Position);
mem.Close();
}
}
}
source.BaseStream.Seek(valuePosition + frameDataSize, SeekOrigin.Begin);
}
}
public void readTagField(BinaryReader source, string zoneCode, string fieldName, ushort fieldDataType, int fieldDataSize, ReadTagParams readTagParams, bool isExtendedHeader = false, ushort languageIndex = 0, ushort streamNumber = 0)
{
string fieldValue = "";
bool setMeta = true;
addFrameClass(fieldName, fieldDataType);
if (0 == fieldDataType) // Unicode string
{
fieldValue = Utils.StripEndingZeroChars(Encoding.Unicode.GetString(source.ReadBytes(fieldDataSize)));
}
else if (1 == fieldDataType) // Byte array
{
if (fieldName.ToUpper().Equals("WM/PICTURE"))
{
byte picCode = source.ReadByte();
// TODO factorize : abstract PictureTypeDecoder + unsupported / supported decision in MetaDataIO ?
PictureInfo.PIC_TYPE picType = ID3v2.DecodeID3v2PictureType(picCode);
int picturePosition;
if (picType.Equals(PictureInfo.PIC_TYPE.Unsupported))
{
addPictureToken(MetaDataIOFactory.TAG_NATIVE, picCode);
picturePosition = takePicturePosition(MetaDataIOFactory.TAG_NATIVE, picCode);
}
else
{
addPictureToken(picType);
picturePosition = takePicturePosition(picType);
}
if (readTagParams.ReadPictures)
{
int picSize = source.ReadInt32();
string mimeType = StreamUtils.ReadNullTerminatedString(source, Encoding.Unicode);
string description = StreamUtils.ReadNullTerminatedString(source, Encoding.Unicode);
PictureInfo picInfo = PictureInfo.fromBinaryData(source.BaseStream, picSize, picType, getImplementedTagType(), picCode, picturePosition);
picInfo.Description = description;
tagData.Pictures.Add(picInfo);
}
setMeta = false;
}
else
{
source.BaseStream.Seek(fieldDataSize, SeekOrigin.Current);
}
}
else if (2 == fieldDataType) // 16-bit Boolean (metadata); 32-bit Boolean (extended header)
{
if (isExtendedHeader)
{
fieldValue = source.ReadUInt32().ToString();
}
else
{
fieldValue = source.ReadUInt16().ToString();
}
}
else if (3 == fieldDataType) // 32-bit unsigned integer
{
uint intValue = source.ReadUInt32();
if (fieldName.Equals("WM/GENRE", StringComparison.OrdinalIgnoreCase))
{
intValue++;
}
fieldValue = intValue.ToString();
}
else if (4 == fieldDataType) // 64-bit unsigned integer
{
fieldValue = source.ReadUInt64().ToString();
}
else if (5 == fieldDataType) // 16-bit unsigned integer
{
fieldValue = source.ReadUInt16().ToString();
}
else if (6 == fieldDataType) // 128-bit GUID; unused for now
{
source.BaseStream.Seek(fieldDataSize, SeekOrigin.Current);
}
if (setMeta)
{
SetMetaField(fieldName.Trim(), fieldValue, readTagParams.ReadAllMetaFrames, zoneCode, 0, streamNumber, decodeLanguage(source.BaseStream, languageIndex));
}
}
private bool readFrames(BinaryReader source, TagInfo Tag, MetaDataIO.ReadTagParams readTagParams)
{
string frameName;
string strValue;
int frameDataSize;
long valuePosition;
int frameFlags;
source.BaseStream.Seek(Tag.FileSize - Tag.DataShift - Tag.Size, SeekOrigin.Begin);
// Read all stored fields
for (int iterator = 0; iterator < Tag.FrameCount; iterator++)
{
frameDataSize = source.ReadInt32();
frameFlags = source.ReadInt32();
frameName = StreamUtils.ReadNullTerminatedString(source, Utils.Latin1Encoding); // Slightly more permissive than what APE specs indicate in terms of allowed characters ("Space(0x20), Slash(0x2F), Digits(0x30...0x39), Letters(0x41...0x5A, 0x61...0x7A)")
valuePosition = source.BaseStream.Position;
if (frameDataSize < 0 || valuePosition + frameDataSize > Tag.FileSize)
{
LogDelegator.GetLogDelegate()(Log.LV_ERROR, "Invalid value found while reading APEtag frame");
return(false);
}
if ((frameDataSize > 0) && (frameDataSize <= 1000))
{
/*
* According to spec : "Items are not zero-terminated like in C / C++.
* If there's a zero character, multiple items are stored under the key and the items are separated by zero characters."
*
* => Values have to be splitted
*/
strValue = Utils.StripEndingZeroChars(Encoding.UTF8.GetString(source.ReadBytes(frameDataSize)));
strValue = strValue.Replace('\0', Settings.InternalValueSeparator).Trim();
SetMetaField(frameName.Trim().ToUpper(), strValue, readTagParams.ReadAllMetaFrames);
}
else if (frameDataSize > 0 && !frameName.ToLower().Contains("lyrics")) // Size > 1000 => Probably an embedded picture
{
int picturePosition;
PictureInfo.PIC_TYPE picType = decodeAPEPictureType(frameName);
if (picType.Equals(PictureInfo.PIC_TYPE.Unsupported))
{
addPictureToken(getImplementedTagType(), frameName);
picturePosition = takePicturePosition(getImplementedTagType(), frameName);
}
else
{
addPictureToken(picType);
picturePosition = takePicturePosition(picType);
}
if (readTagParams.ReadPictures)
{
// Description seems to be a null-terminated ANSI string containing
// * The frame name
// * A byte (0x2E)
// * The picture type (3 characters; similar to the 2nd part of the mime-type)
string description = StreamUtils.ReadNullTerminatedString(source, Utils.Latin1Encoding);
PictureInfo picInfo = PictureInfo.fromBinaryData(source.BaseStream, frameDataSize - description.Length - 1, picType, getImplementedTagType(), frameName, picturePosition);
picInfo.Description = description;
tagData.Pictures.Add(picInfo);
}
}
source.BaseStream.Seek(valuePosition + frameDataSize, SeekOrigin.Begin);
}
return(true);
}