/* -------------------------------------------------------------------------- */
public TFLACFile()
{
FID3v2 = new TID3v2();
FHeader = new TFlacHeader();
aMetaBlockOther = new ArrayList();
aExtraFields = new ArrayList();
FResetData(true, true);
}
/* -------------------------------------------------------------------------- */
// saves metablocks back to the file
// always tries to rebuild header so padding exists after comment block and no more than 1 padding block exists
private bool RebuildFile( String sFile, MemoryStream VorbisBlock)
{
FileStream source = null;
BinaryReader r = null;
FileStream destination = null;
BinaryWriter w = null;
long iFileAge;
int iNewPadding;
int iMetaCount;
int iExtraPadding;
String sTmp;
String BufferName = "";
byte[] MetaDataBlockHeader = new byte[4];
TFlacHeader oldHeader = new TFlacHeader();
MemoryStream MetaBlocks = null;
bool bRebuild;
bool bRearrange;
bool result = false;
bRearrange = false;
iExtraPadding = 0;
if ( !File.Exists(sFile) ) return result;
try
{
iFileAge = 0;
if ( bTAG_PreserveDate ) iFileAge = File.GetLastWriteTime(sFile).Ticks;
// re arrange other metadata in case of
// 1. padding block is not aligned after vorbis comment
// 2. insufficient padding - rearange upon file rebuild
// 3. fragmented padding blocks
iMetaCount = aMetaBlockOther.Count;
if ( (FPaddingIndex != FVorbisIndex + 1) || (FPadding <= VorbisBlock.Length - FTagSize ) || FPaddingFragments )
{
MetaBlocks = new MemoryStream();
for (int i = 0; i < iMetaCount; i++)
{
((TMetaData)aMetaBlockOther[ i ]).MetaDataBlockHeader[ 0 ] = (byte)( ((TMetaData)aMetaBlockOther[i]).MetaDataBlockHeader[ 0 ] & 0x7f ); // not last
if (META_PADDING == ((TMetaData)aMetaBlockOther[ i ]).MetaDataBlockHeader[ 0 ])
{
iExtraPadding += (int)( ((TMetaData)aMetaBlockOther[ i ]).Data.Length + 4 ); // add padding size plus 4 bytes of header block
}
else
{
((TMetaData)aMetaBlockOther[ i ]).Data.Position = 0;
MetaBlocks.Write( ((TMetaData)aMetaBlockOther[ i ]).MetaDataBlockHeader,0,4 );
Utils.CopyMemoryStreamFrom(MetaBlocks,((TMetaData)aMetaBlockOther[ i ]).Data, 0);
}
}
MetaBlocks.Position = 0;
bRearrange = true;
}
// set up file
if (FPadding <= VorbisBlock.Length - FTagSize ) // no room rebuild the file from scratch
{
bRebuild = true;
BufferName = sFile + "~";
source = new FileStream( sFile, FileMode.Open, FileAccess.Read ); // Set read-only and open old file, and create new
r = new BinaryReader(source);
destination = new FileStream( BufferName, FileMode.Create, FileAccess.Write);
w = new BinaryWriter(destination);
oldHeader.StreamMarker = r.ReadChars(4);
oldHeader.MetaDataBlockHeader = r.ReadBytes(4);
oldHeader.Info = r.ReadBytes(18);
oldHeader.MD5Sum = r.ReadBytes(16);
oldHeader.MetaDataBlockHeader[0] = (byte)(oldHeader.MetaDataBlockHeader[0] & 0x7f ); //just in case no metadata existed
//w.Write( oldHeader, 0, 32 );
w.Write(oldHeader.StreamMarker);
w.Write(oldHeader.MetaDataBlockHeader);
w.Write(oldHeader.Info);
w.Write(oldHeader.MD5Sum);
Utils.CopyMemoryStreamFrom(w, MetaBlocks, 0);
}
else
{
bRebuild = false;
source = null;
destination = new FileStream ( sFile, FileMode.Create, FileAccess.Write); // Set write-access and open file
w = new BinaryWriter(destination);
if (bRearrange)
{
destination.Seek( 32, SeekOrigin.Begin );
Utils.CopyMemoryStreamFrom(destination, MetaBlocks, 0);
}
else
{
destination.Seek( FVCOffset - 4, SeekOrigin.Begin);
}
}
// finally write vorbis block
MetaDataBlockHeader[0] = META_VORBIS_COMMENT;
MetaDataBlockHeader[1] = (byte)(( VorbisBlock.Length >> 16 ) & 255 );
MetaDataBlockHeader[2] = (byte)(( VorbisBlock.Length >> 8 ) & 255 );
MetaDataBlockHeader[3] = (byte)( VorbisBlock.Length & 255 );
destination.Write( MetaDataBlockHeader,0, 4 );
Utils.CopyMemoryStreamFrom(destination,VorbisBlock,VorbisBlock.Length);
// and add padding
if (FPaddingLast || bRearrange)
{
MetaDataBlockHeader[0] = META_PADDING | 0x80;
}
else
{
MetaDataBlockHeader[0] = META_PADDING;
}
if (bRebuild)
{
iNewPadding = 4096; // why not...
}
else
{
if (FTagSize > VorbisBlock.Length )
{ // tag got smaller increase padding
iNewPadding = (int)(FPadding + FTagSize - VorbisBlock.Length) + iExtraPadding;
}
else
{ // tag got bigger shrink padding
iNewPadding = (int)(FPadding - VorbisBlock.Length + FTagSize ) + iExtraPadding;
}
}
MetaDataBlockHeader[1] = (byte)(( iNewPadding >> 16 ) & 255 );
MetaDataBlockHeader[2] = (byte)(( iNewPadding >> 8 ) & 255 );
MetaDataBlockHeader[3] = (byte)( iNewPadding & 255 );
w.Write(MetaDataBlockHeader,0,4);
if ((FPadding != iNewPadding) | bRearrange )
{ // fill the block with zeros
sTmp = "";
for (int i=0; i<iNewPadding; i++)
sTmp += '\0';
w.Write( sTmp );
}
// finish
if ( bRebuild )
{ // time to put back the audio data...
source.Seek( FAudioOffset, SeekOrigin.Begin );
Utils.CopyMemoryStreamFrom(destination, source, source.Length - FAudioOffset);
source.Close();
destination.Close();
//Replace old file and delete temporary file
File.Delete( sFile );
File.Copy( BufferName, sFile );
result = true;
}
else
{
result = true;
destination.Close();
}
// post save tasks
DateTime newDateTime = new DateTime(iFileAge);
if (bTAG_PreserveDate) File.SetLastWriteTime( sFile, newDateTime );
if (bRearrange) MetaBlocks.Close();
}
catch (Exception e)
{
// Access error
if ( File.Exists( BufferName ) ) File.Delete( BufferName );
//LogDelegator.GetLogDelegate()(Log.LV_ERROR,e.Message);
System.Console.WriteLine(e.StackTrace);
}
// stream deallocation
if (destination != null) destination.Close();
if (source != null) source.Close();
return result;
}
/* -------------------------------------------------------------------------- */
public TFLACFile()
{
FID3v2 = new TID3v2();
FHeader = new TFlacHeader();
aMetaBlockOther = new ArrayList();
aExtraFields = new ArrayList();
FResetData( true, true );
}
/* -------------------------------------------------------------------------- */
// saves metablocks back to the file
// always tries to rebuild header so padding exists after comment block and no more than 1 padding block exists
private bool RebuildFile(String sFile, MemoryStream VorbisBlock)
{
FileStream source = null;
BinaryReader r = null;
FileStream destination = null;
BinaryWriter w = null;
long iFileAge;
int iNewPadding;
int iMetaCount;
int iExtraPadding;
String sTmp;
String BufferName = "";
byte[] MetaDataBlockHeader = new byte[4];
TFlacHeader oldHeader = new TFlacHeader();
MemoryStream MetaBlocks = null;
bool bRebuild;
bool bRearrange;
bool result = false;
bRearrange = false;
iExtraPadding = 0;
if (!File.Exists(sFile))
{
return(result);
}
try
{
iFileAge = 0;
if (bTAG_PreserveDate)
{
iFileAge = File.GetLastWriteTime(sFile).Ticks;
}
// re arrange other metadata in case of
// 1. padding block is not aligned after vorbis comment
// 2. insufficient padding - rearange upon file rebuild
// 3. fragmented padding blocks
iMetaCount = aMetaBlockOther.Count;
if ((FPaddingIndex != FVorbisIndex + 1) || (FPadding <= VorbisBlock.Length - FTagSize) || FPaddingFragments)
{
MetaBlocks = new MemoryStream();
for (int i = 0; i < iMetaCount; i++)
{
((TMetaData)aMetaBlockOther[i]).MetaDataBlockHeader[0] = (byte)(((TMetaData)aMetaBlockOther[i]).MetaDataBlockHeader[0] & 0x7f); // not last
if (META_PADDING == ((TMetaData)aMetaBlockOther[i]).MetaDataBlockHeader[0])
{
iExtraPadding += (int)(((TMetaData)aMetaBlockOther[i]).Data.Length + 4); // add padding size plus 4 bytes of header block
}
else
{
((TMetaData)aMetaBlockOther[i]).Data.Position = 0;
MetaBlocks.Write(((TMetaData)aMetaBlockOther[i]).MetaDataBlockHeader, 0, 4);
Utils.CopyMemoryStreamFrom(MetaBlocks, ((TMetaData)aMetaBlockOther[i]).Data, 0);
}
}
MetaBlocks.Position = 0;
bRearrange = true;
}
// set up file
if (FPadding <= VorbisBlock.Length - FTagSize) // no room rebuild the file from scratch
{
bRebuild = true;
BufferName = sFile + "~";
source = new FileStream(sFile, FileMode.Open, FileAccess.Read); // Set read-only and open old file, and create new
r = new BinaryReader(source);
destination = new FileStream(BufferName, FileMode.Create, FileAccess.Write);
w = new BinaryWriter(destination);
oldHeader.StreamMarker = r.ReadChars(4);
oldHeader.MetaDataBlockHeader = r.ReadBytes(4);
oldHeader.Info = r.ReadBytes(18);
oldHeader.MD5Sum = r.ReadBytes(16);
oldHeader.MetaDataBlockHeader[0] = (byte)(oldHeader.MetaDataBlockHeader[0] & 0x7f); //just in case no metadata existed
//w.Write( oldHeader, 0, 32 );
w.Write(oldHeader.StreamMarker);
w.Write(oldHeader.MetaDataBlockHeader);
w.Write(oldHeader.Info);
w.Write(oldHeader.MD5Sum);
Utils.CopyMemoryStreamFrom(w, MetaBlocks, 0);
}
else
{
bRebuild = false;
source = null;
destination = new FileStream(sFile, FileMode.Create, FileAccess.Write); // Set write-access and open file
w = new BinaryWriter(destination);
if (bRearrange)
{
destination.Seek(32, SeekOrigin.Begin);
Utils.CopyMemoryStreamFrom(destination, MetaBlocks, 0);
}
else
{
destination.Seek(FVCOffset - 4, SeekOrigin.Begin);
}
}
// finally write vorbis block
MetaDataBlockHeader[0] = META_VORBIS_COMMENT;
MetaDataBlockHeader[1] = (byte)((VorbisBlock.Length >> 16) & 255);
MetaDataBlockHeader[2] = (byte)((VorbisBlock.Length >> 8) & 255);
MetaDataBlockHeader[3] = (byte)(VorbisBlock.Length & 255);
destination.Write(MetaDataBlockHeader, 0, 4);
Utils.CopyMemoryStreamFrom(destination, VorbisBlock, VorbisBlock.Length);
// and add padding
if (FPaddingLast || bRearrange)
{
MetaDataBlockHeader[0] = META_PADDING | 0x80;
}
else
{
MetaDataBlockHeader[0] = META_PADDING;
}
if (bRebuild)
{
iNewPadding = 4096; // why not...
}
else
{
if (FTagSize > VorbisBlock.Length)
{ // tag got smaller increase padding
iNewPadding = (int)(FPadding + FTagSize - VorbisBlock.Length) + iExtraPadding;
}
else
{ // tag got bigger shrink padding
iNewPadding = (int)(FPadding - VorbisBlock.Length + FTagSize) + iExtraPadding;
}
}
MetaDataBlockHeader[1] = (byte)((iNewPadding >> 16) & 255);
MetaDataBlockHeader[2] = (byte)((iNewPadding >> 8) & 255);
MetaDataBlockHeader[3] = (byte)(iNewPadding & 255);
w.Write(MetaDataBlockHeader, 0, 4);
if ((FPadding != iNewPadding) | bRearrange)
{ // fill the block with zeros
sTmp = "";
for (int i = 0; i < iNewPadding; i++)
{
sTmp += '\0';
}
w.Write(sTmp);
}
// finish
if (bRebuild)
{ // time to put back the audio data...
source.Seek(FAudioOffset, SeekOrigin.Begin);
Utils.CopyMemoryStreamFrom(destination, source, source.Length - FAudioOffset);
source.Close();
destination.Close();
//Replace old file and delete temporary file
File.Delete(sFile);
File.Copy(BufferName, sFile);
result = true;
}
else
{
result = true;
destination.Close();
}
// post save tasks
DateTime newDateTime = new DateTime(iFileAge);
if (bTAG_PreserveDate)
{
File.SetLastWriteTime(sFile, newDateTime);
}
if (bRearrange)
{
MetaBlocks.Close();
}
}
catch (Exception e)
{
// Access error
if (File.Exists(BufferName))
{
File.Delete(BufferName);
}
//LogDelegator.GetLogDelegate()(Log.LV_ERROR,e.Message);
System.Console.WriteLine(e.StackTrace);
}
// stream deallocation
if (destination != null)
{
destination.Close();
}
if (source != null)
{
source.Close();
}
return(result);
}
