protected override bool read(BinaryReader source, ReadTagParams readTagParams)
{
bool result = true;
SPCHeader header = new SPCHeader();
SPCExTags footer = new SPCExTags();
header.Reset();
footer.Reset();
resetData();
source.BaseStream.Seek(sizeInfo.ID3v2Size, SeekOrigin.Begin);
if (!readHeader(source, ref header))
{
throw new InvalidDataException("Not a SPC file");
}
// Reads the header tag
if (SPCHeader.TAG_IN_HEADER == header.TagInHeader)
{
tagExists = true;
source.BaseStream.Seek(REGISTERS_LENGTH, SeekOrigin.Current);
readHeaderTags(source, ref header, readTagParams);
}
AudioDataOffset = source.BaseStream.Position;
// Reads extended tag
if (source.BaseStream.Length > SPC_RAW_LENGTH)
{
source.BaseStream.Seek(SPC_RAW_LENGTH, SeekOrigin.Begin);
readExtendedData(source, ref footer, readTagParams);
}
else
{
if (readTagParams.PrepareForWriting)
{
structureHelper.AddZone(SPC_RAW_LENGTH, 0, ZONE_EXTENDED);
}
}
AudioDataSize = sizeInfo.FileSize - header.Size - footer.Size;
bitrate = AudioDataSize * 8 / duration;
return(result);
}
protected override Boolean read(BinaryReader source, MetaDataIO.ReadTagParams readTagParams)
{
var result = true;
var header = new SPCHeader();
var footer = new SPCExTags();
header.Reset();
footer.Reset();
resetData();
source.BaseStream.Seek(sizeInfo.ID3v2Size, SeekOrigin.Begin);
isValid = readHeader(source, ref header);
if (!isValid)
{
throw new Exception("Not a SPC file");
}
// Reads the header tag
if (SPCHeader.TAG_IN_HEADER == header.TagInHeader)
{
tagExists = true;
source.BaseStream.Seek(REGISTERS_LENGTH, SeekOrigin.Current);
readHeaderTags(source, ref header, readTagParams);
}
// Reads extended tag
if (source.BaseStream.Length > SPC_RAW_LENGTH)
{
source.BaseStream.Seek(SPC_RAW_LENGTH, SeekOrigin.Begin);
readExtendedData(source, ref footer, readTagParams);
}
else
{
if (readTagParams.PrepareForWriting)
{
structureHelper.AddZone(SPC_RAW_LENGTH, 0, ZONE_EXTENDED);
}
}
bitrate = (sizeInfo.FileSize - header.Size) * 8 / duration;
return(result);
}
private void readExtendedData(ref BinaryReader source, ref SPCExTags footer)
{
footer.FooterTag = Utils.GetStringFromCharArray(Utils.ReadTrueChars(source, 4));
if (XTENDED_TAG == footer.FooterTag)
{
footer.FooterSize = source.ReadUInt32();
ExtendedItem anItem;
long i = source.BaseStream.Position;
while (source.BaseStream.Position - i < footer.FooterSize)
{
anItem = new ExtendedItem();
anItem.ID = source.ReadByte();
anItem.Type = source.ReadByte();
anItem.Length = source.ReadUInt16();
switch (anItem.Type)
{
case XID6_TVAL:
// nothing; value is stored into the Length field
break;
case XID6_TSTR:
anItem.Data = Utils.GetStringFromCharArray(Utils.ReadTrueChars(source, anItem.Length));
while (0 == source.ReadByte())
{
; // Ending zeroes
}
source.BaseStream.Seek(-1, SeekOrigin.Current);
break;
case XID6_TINT:
anItem.Data = source.ReadInt32();
break;
}
footer.Items.Add(anItem.ID, anItem);
}
}
}
private void readExtendedData(BinaryReader source, ref SPCExTags footer, ReadTagParams readTagParams)
{
long initialPosition = source.BaseStream.Position;
footer.FormatTag = Utils.Latin1Encoding.GetString(source.ReadBytes(4));
if (XTENDED_TAG == footer.FormatTag)
{
tagExists = true;
footer.Size = source.ReadUInt32();
byte ID, type;
ushort size;
string strData = "";
int intData = 0;
long ticks = 0;
long dataPosition = source.BaseStream.Position;
while (source.BaseStream.Position < dataPosition + footer.Size - 4)
{
ID = source.ReadByte();
type = source.ReadByte();
size = source.ReadUInt16();
switch (type)
{
case XID6_TVAL:
// Value is stored into the Size field
if (ID == XID6_TRACK) // Specific case : upper byte is the number 0-99, lower byte is an optional ASCII character
{
intData = size >> 8;
strData = intData.ToString();
byte optionalChar = (byte)(size & 0x00FF);
if (optionalChar > 0x20) // Character is displayable
{
strData += (char)optionalChar;
}
}
else
{
intData = size;
strData = intData.ToString();
}
break;
case XID6_TSTR:
intData = 0;
strData = Utils.Latin1Encoding.GetString(source.ReadBytes(size)).Replace("\0", "").Trim();
while (source.BaseStream.Position < source.BaseStream.Length && 0 == source.ReadByte())
{
; // Skip parasite ending zeroes
}
if (source.BaseStream.Position < source.BaseStream.Length)
{
source.BaseStream.Seek(-1, SeekOrigin.Current);
}
break;
case XID6_TINT:
intData = source.ReadInt32();
strData = intData.ToString();
break;
}
if (XID6_LOOP == ID)
{
ticks += Math.Min(XID6_MAXTICKS, intData);
}
else if (XID6_LOOPX == ID)
{
ticks = ticks * Math.Min(XID6_MAXLOOP, (int)size);
}
else if (XID6_INTRO == ID)
{
ticks += Math.Min(XID6_MAXTICKS, intData);
}
else if (XID6_END == ID)
{
ticks += Math.Min(XID6_MAXTICKS, intData);
}
else if (XID6_FADE == ID)
{
ticks += Math.Min(XID6_MAXTICKS, intData);
}
SetMetaField(ID.ToString(), strData, readTagParams.ReadAllMetaFrames, ZONE_EXTENDED);
}
if (ticks > 0)
{
duration = Math.Round((double)ticks / XID6_TICKSSEC);
}
if (readTagParams.PrepareForWriting)
{
structureHelper.AddZone(initialPosition, (int)(source.BaseStream.Position - initialPosition), ZONE_EXTENDED);
}
}
}
// === PUBLIC METHODS ===
public bool ReadFromFile(String fileName)
{
bool result = true;
SPCHeader header = new SPCHeader();
SPCExTags footer = new SPCExTags();
FResetData();
header.Reset();
footer.Reset();
FileStream fs = null;
BinaryReader source = null;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
fs.Lock(0, fs.Length);
source = new BinaryReader(fs);
if (!readHeader(ref source, ref header))
{
throw new Exception("Not a PSF file");
}
// Reads the header tag
if (SPCHeader.TAG_IN_HEADER == header.TagInHeader)
{
source.BaseStream.Seek(REGISTERS_LENGTH, SeekOrigin.Current);
readHeaderTags(ref source);
}
// Reads extended tag
if (fs.Length > SPC_RAW_LENGTH)
{
source.BaseStream.Seek(SPC_RAW_LENGTH, SeekOrigin.Begin);
readExtendedData(ref source, ref footer);
if (footer.Items.ContainsKey(XID6_ARTIST))
{
FArtist = (String)((ExtendedItem)footer.Items[XID6_ARTIST]).Data;
}
if (footer.Items.ContainsKey(XID6_CMNTS))
{
FComment = (String)((ExtendedItem)footer.Items[XID6_CMNTS]).Data;
}
if (footer.Items.ContainsKey(XID6_SONG))
{
FTitle = (String)((ExtendedItem)footer.Items[XID6_SONG]).Data;
}
if (footer.Items.ContainsKey(XID6_COPY))
{
FYear = ((ExtendedItem)footer.Items[XID6_COPY]).Length.ToString();
}
if (footer.Items.ContainsKey(XID6_TRACK))
{
FTrack = ((ExtendedItem)footer.Items[XID6_TRACK]).Length >> 8;
}
if (footer.Items.ContainsKey(XID6_OST))
{
FAlbum = (String)((ExtendedItem)footer.Items[XID6_OST]).Data;
}
if (("" == FAlbum) && (footer.Items.ContainsKey(XID6_GAME)))
{
FAlbum = (String)((ExtendedItem)footer.Items[XID6_GAME]).Data;
}
long ticks = 0;
if (footer.Items.ContainsKey(XID6_LOOP))
{
ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_LOOP]).Data);
}
if (footer.Items.ContainsKey(XID6_LOOPX))
{
ticks = ticks * Math.Min(XID6_MAXLOOP, (int)((ExtendedItem)footer.Items[XID6_LOOPX]).Length);
}
if (footer.Items.ContainsKey(XID6_INTRO))
{
ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_INTRO]).Data);
}
if (footer.Items.ContainsKey(XID6_END))
{
ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_END]).Data);
}
if (ticks > 0)
{
FDuration = Math.Round((double)ticks / XID6_TICKSSEC);
}
}
}
catch (Exception e)
{
System.Console.WriteLine(e.StackTrace);
//LogDelegator.GetLogDelegate()(Log.LV_ERROR, e.Message);
result = false;
}
if (fs != null)
{
fs.Unlock(0, fs.Length);
fs.Close();
}
return(result);
}
// === PUBLIC METHODS ===
public bool ReadFromFile(String fileName)
{
bool result = true;
SPCHeader header = new SPCHeader();
SPCExTags footer = new SPCExTags();
FResetData();
header.Reset();
footer.Reset();
FileStream fs = null;
BinaryReader source = null;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
fs.Lock(0,fs.Length);
source = new BinaryReader(fs);
if ( !readHeader(ref source, ref header) ) throw new Exception("Not a PSF file");
// Reads the header tag
if (SPCHeader.TAG_IN_HEADER == header.TagInHeader)
{
source.BaseStream.Seek(REGISTERS_LENGTH,SeekOrigin.Current);
readHeaderTags(ref source);
}
// Reads extended tag
if (fs.Length > SPC_RAW_LENGTH)
{
source.BaseStream.Seek(SPC_RAW_LENGTH,SeekOrigin.Begin);
readExtendedData(ref source, ref footer);
if (footer.Items.ContainsKey(XID6_ARTIST)) FArtist = (String)((ExtendedItem)footer.Items[XID6_ARTIST]).Data;
if (footer.Items.ContainsKey(XID6_CMNTS)) FComment = (String)((ExtendedItem)footer.Items[XID6_CMNTS]).Data;
if (footer.Items.ContainsKey(XID6_SONG)) FTitle = (String)((ExtendedItem)footer.Items[XID6_SONG]).Data;
if (footer.Items.ContainsKey(XID6_COPY)) FYear = ((ExtendedItem)footer.Items[XID6_COPY]).Length.ToString();
if (footer.Items.ContainsKey(XID6_TRACK)) FTrack = ((ExtendedItem)footer.Items[XID6_TRACK]).Length >> 8;
if (footer.Items.ContainsKey(XID6_OST)) FAlbum = (String)((ExtendedItem)footer.Items[XID6_OST]).Data;
if (("" == FAlbum) && (footer.Items.ContainsKey(XID6_GAME))) FAlbum = (String)((ExtendedItem)footer.Items[XID6_GAME]).Data;
long ticks = 0;
if (footer.Items.ContainsKey(XID6_LOOP)) ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_LOOP]).Data);
if (footer.Items.ContainsKey(XID6_LOOPX)) ticks = ticks * Math.Min(XID6_MAXLOOP, (int)((ExtendedItem)footer.Items[XID6_LOOPX]).Length );
if (footer.Items.ContainsKey(XID6_INTRO)) ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_INTRO]).Data);
if (footer.Items.ContainsKey(XID6_END)) ticks += Math.Min(XID6_MAXTICKS, (int)((ExtendedItem)footer.Items[XID6_END]).Data);
if (ticks > 0)
FDuration = Math.Round( (double)ticks / XID6_TICKSSEC );
}
}
catch (Exception e)
{
System.Console.WriteLine(e.StackTrace);
//LogDelegator.GetLogDelegate()(Log.LV_ERROR, e.Message);
result = false;
}
if (fs != null)
{
fs.Unlock(0,fs.Length);
fs.Close();
}
return result;
}
private void readExtendedData(ref BinaryReader source, ref SPCExTags footer)
{
footer.FooterTag = Utils.GetStringFromCharArray(Utils.ReadTrueChars(source,4));
if (XTENDED_TAG == footer.FooterTag)
{
footer.FooterSize = source.ReadUInt32();
ExtendedItem anItem;
long i=source.BaseStream.Position;
while(source.BaseStream.Position-i < footer.FooterSize)
{
anItem = new ExtendedItem();
anItem.ID = source.ReadByte();
anItem.Type = source.ReadByte();
anItem.Length = source.ReadUInt16();
switch(anItem.Type)
{
case XID6_TVAL :
// nothing; value is stored into the Length field
break;
case XID6_TSTR :
anItem.Data = Utils.GetStringFromCharArray(Utils.ReadTrueChars(source,anItem.Length));
while(0 == source.ReadByte()); // Ending zeroes
source.BaseStream.Seek(-1,SeekOrigin.Current);
break;
case XID6_TINT :
anItem.Data = source.ReadInt32();
break;
}
footer.Items.Add( anItem.ID, anItem );
}
}
}
