protected override bool read(BinaryReader source, MetaDataIO.ReadTagParams readTagParams)
{
bool result = true;
PSFHeader header = new PSFHeader();
PSFTag tag = new PSFTag();
header.Reset();
tag.Reset();
resetData();
isValid = readHeader(source, ref header);
if (!isValid)
{
throw new Exception("Not a PSF file");
}
if (source.BaseStream.Length > HEADER_LENGTH + header.CompressedProgramLength + header.ReservedAreaLength)
{
source.BaseStream.Seek((long)(4 + header.CompressedProgramLength + header.ReservedAreaLength), SeekOrigin.Current);
if (!readTag(source, ref tag, readTagParams))
{
throw new Exception("Not a PSF tag");
}
tagExists = true;
}
bitrate = (sizeInfo.FileSize - tag.size) * 8 / duration;
return(result);
}
private bool readTag(ref BinaryReader source, ref PSFTag tag)
{
tag.TagHeader = Utils.GetStringFromCharArray(Utils.ReadTrueChars(source, 5));
if (TAG_HEADER == tag.TagHeader)
{
FTagExists = true;
String s = readPSFLine(ref source);
int equalIndex;
String keyStr;
String valueStr;
while (s != "")
{
equalIndex = s.IndexOf("=");
if (equalIndex != -1)
{
keyStr = s.Substring(0, equalIndex).Trim().ToLower();
valueStr = s.Substring(equalIndex + 1, s.Length - (equalIndex + 1)).Trim();
if (tag.tags.ContainsKey(keyStr))
{
tag.tags[keyStr] = tag.tags[keyStr] + " " + valueStr;
}
else
{
tag.tags[keyStr] = valueStr;
}
}
s = readPSFLine(ref source);
}
return(true);
}
else
{
return(false);
}
}
// === PUBLIC METHODS ===
public bool ReadFromFile(String fileName)
{
bool result = true;
PSFHeader header = new PSFHeader();
PSFTag tag = new PSFTag();
FResetData();
header.Reset();
tag.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");
}
if (fs.Length > HEADER_LENGTH + header.CompressedProgramLength + header.ReservedAreaLength)
{
fs.Seek((long)(4 + header.CompressedProgramLength + header.ReservedAreaLength), SeekOrigin.Current);
if (!readTag(ref source, ref tag))
{
throw new Exception("Not a PSF tag");
}
}
}
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();
}
if (tag.tags.ContainsKey(TAG_GAME))
{
FAlbum = (String)tag.tags[TAG_GAME];
}
if (tag.tags.ContainsKey(TAG_ARTIST))
{
FArtist = (String)tag.tags[TAG_ARTIST];
}
if (tag.tags.ContainsKey(TAG_COMMENT))
{
FComment = (String)tag.tags[TAG_COMMENT];
}
if (tag.tags.ContainsKey(TAG_TITLE))
{
FTitle = (String)tag.tags[TAG_TITLE];
}
if (tag.tags.ContainsKey(TAG_YEAR))
{
FYear = (String)tag.tags[TAG_YEAR];
}
if (tag.tags.ContainsKey(TAG_LENGTH))
{
FDuration = parsePSFDuration((String)tag.tags[TAG_LENGTH]);
}
if (tag.tags.ContainsKey(TAG_FADE))
{
FDuration += parsePSFDuration((String)tag.tags[TAG_FADE]);
}
return(result);
}
private bool readTag(BinaryReader source, ref PSFTag tag, ReadTagParams readTagParams)
{
long initialPosition = source.BaseStream.Position;
Encoding encoding = Utils.Latin1Encoding;
tag.TagHeader = Utils.Latin1Encoding.GetString(source.ReadBytes(5));
if (TAG_HEADER == tag.TagHeader)
{
string s = readPSFLine(source.BaseStream, encoding);
int equalIndex;
string keyStr, valueStr, lowKeyStr;
string lastKey = "";
string lastValue = "";
bool lengthFieldFound = false;
while (s != "")
{
equalIndex = s.IndexOf("=");
if (equalIndex != -1)
{
keyStr = s.Substring(0, equalIndex).Trim();
lowKeyStr = keyStr.ToLower();
valueStr = s.Substring(equalIndex + 1, s.Length - (equalIndex + 1)).Trim();
if (lowKeyStr.Equals("utf8") && valueStr.Equals("1"))
{
encoding = Encoding.UTF8;
}
if (lowKeyStr.Equals(TAG_LENGTH) || lowKeyStr.Equals(TAG_FADE))
{
if (lowKeyStr.Equals(TAG_LENGTH))
{
lengthFieldFound = true;
}
duration += parsePSFDuration(valueStr);
}
// PSF specifics : a field appearing more than once is the same field, with values spanning over multiple lines
if (lastKey.Equals(keyStr))
{
lastValue += Environment.NewLine + valueStr;
}
else
{
SetMetaField(lastKey, lastValue, readTagParams.ReadAllMetaFrames);
lastValue = valueStr;
}
lastKey = keyStr;
}
s = readPSFLine(source.BaseStream, encoding);
} // Metadata lines
SetMetaField(lastKey, lastValue, readTagParams.ReadAllMetaFrames);
// PSF files without any 'length' tag take default duration, regardless of 'fade' value
if (!lengthFieldFound)
{
duration = PSF_DEFAULT_DURATION;
}
tag.size = (int)(source.BaseStream.Position - initialPosition);
if (readTagParams.PrepareForWriting)
{
structureHelper.AddZone(initialPosition, tag.size);
}
return(true);
}
else
{
return(false);
}
}
// === PUBLIC METHODS ===
public bool ReadFromFile(String fileName)
{
bool result = true;
PSFHeader header = new PSFHeader();
PSFTag tag = new PSFTag();
FResetData();
header.Reset();
tag.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");
if (fs.Length > HEADER_LENGTH+header.CompressedProgramLength+header.ReservedAreaLength)
{
fs.Seek((long)(4+header.CompressedProgramLength+header.ReservedAreaLength),SeekOrigin.Current);
if ( !readTag(ref source,ref tag) ) throw new Exception("Not a PSF tag");
}
}
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();
}
if (tag.tags.ContainsKey(TAG_GAME)) FAlbum = (String)tag.tags[TAG_GAME];
if (tag.tags.ContainsKey(TAG_ARTIST)) FArtist = (String)tag.tags[TAG_ARTIST];
if (tag.tags.ContainsKey(TAG_COMMENT)) FComment = (String)tag.tags[TAG_COMMENT];
if (tag.tags.ContainsKey(TAG_TITLE)) FTitle = (String)tag.tags[TAG_TITLE];
if (tag.tags.ContainsKey(TAG_YEAR)) FYear = (String)tag.tags[TAG_YEAR];
if (tag.tags.ContainsKey(TAG_LENGTH))
{
FDuration = parsePSFDuration( (String)tag.tags[TAG_LENGTH] );
}
if (tag.tags.ContainsKey(TAG_FADE))
{
FDuration += parsePSFDuration( (String)tag.tags[TAG_FADE] );
}
return result;
}
private bool readTag(ref BinaryReader source, ref PSFTag tag)
{
tag.TagHeader = Utils.GetStringFromCharArray( Utils.ReadTrueChars(source, 5) );
if (TAG_HEADER == tag.TagHeader)
{
FTagExists = true;
String s = readPSFLine(ref source);
int equalIndex;
String keyStr;
String valueStr;
while ( s != "" )
{
equalIndex = s.IndexOf("=");
if (equalIndex != -1)
{
keyStr = s.Substring(0,equalIndex).Trim().ToLower();
valueStr = s.Substring(equalIndex+1, s.Length-(equalIndex+1)).Trim();
if (tag.tags.ContainsKey(keyStr))
{
tag.tags[keyStr] = tag.tags[keyStr] + " " + valueStr;
}
else
{
tag.tags[keyStr] = valueStr;
}
}
s = readPSFLine(ref source);
}
return true;
}
else
{
return false;
}
}