/* -------------------------------------------------------------------------- */
public bool GetInfo(String sFile, bool bSetTags)
{
FileStream fs = null;
BinaryReader r = null;
byte[] aMetaDataBlockHeader = new byte[4];
int iBlockLength;
int iMetaType;
int iIndex;
bool bPaddingFound;
bool result = true;
bPaddingFound = false;
FResetData(true, false);
try
{
// Read data from ID3 tags
FID3v2.ReadFromFile(sFile);
// Set read-access and open file
fs = new FileStream(sFile, FileMode.Open, FileAccess.Read);
fs.Lock(0, fs.Length);
r = new BinaryReader(fs);
FFileLength = (int)fs.Length;
FFileName = sFile;
// Seek past the ID3v2 tag, if there is one
if (FID3v2.Exists)
{
fs.Seek(FID3v2.Size, SeekOrigin.Begin);
}
// Read header data
FHeader.Reset();
FHeader.StreamMarker = r.ReadChars(4);
FHeader.MetaDataBlockHeader = r.ReadBytes(4);
FHeader.Info = r.ReadBytes(18);
FHeader.MD5Sum = r.ReadBytes(16);
// Process data if loaded and header valid
if (Utils.StringEqualsArr("fLaC", FHeader.StreamMarker))
{
FChannels = (byte)(((FHeader.Info[12] >> 1) & 0x7) + 1);
FSampleRate = (FHeader.Info[10] << 12 | FHeader.Info[11] << 4 | FHeader.Info[12] >> 4);
FBitsPerSample = (byte)(((FHeader.Info[12] & 1) << 4) | (FHeader.Info[13] >> 4) + 1);
FSamples = (FHeader.Info[14] << 24 | FHeader.Info[15] << 16 | FHeader.Info[16] << 8 | FHeader.Info[17]);
if (0 == (FHeader.MetaDataBlockHeader[1] & 0x80)) // metadata block exists
{
iIndex = 0;
do // read more metadata blocks if available
{
aMetaDataBlockHeader = r.ReadBytes(4);
iIndex++; // metadatablock index
iBlockLength = (aMetaDataBlockHeader[1] << 16 | aMetaDataBlockHeader[2] << 8 | aMetaDataBlockHeader[3]); //decode length
if (iBlockLength <= 0)
{
break; // can it be 0 ?
}
iMetaType = (aMetaDataBlockHeader[0] & 0x7F); // decode metablock type
if (iMetaType == META_VORBIS_COMMENT)
{ // read vorbis block
FVCOffset = (int)fs.Position;
FTagSize = iBlockLength;
FVorbisIndex = iIndex;
ReadTag(r, bSetTags); // set up fields
}
else
{
if ((iMetaType == META_PADDING) && (!bPaddingFound)) // we have padding block
{
FPadding = iBlockLength; // if we find more skip & put them in metablock array
FPaddingLast = ((aMetaDataBlockHeader[0] & 0x80) != 0);
FPaddingIndex = iIndex;
bPaddingFound = true;
fs.Seek(FPadding, SeekOrigin.Current); // advance into file till next block or audio data start
}
else // all other
{
if (iMetaType <= 5) // is it a valid metablock ?
{
if (META_PADDING == iMetaType) // set flag for fragmented padding blocks
{
FPaddingFragments = true;
}
AddMetaDataOther(aMetaDataBlockHeader, r, iBlockLength, iIndex);
}
else
{
FSamples = 0; //ops...
break;
}
}
}
}while (0 == (aMetaDataBlockHeader[0] & 0x80)); // while is not last flag ( first bit == 1 )
}
}
}
catch (Exception e)
{
System.Console.WriteLine(e.StackTrace);
//LogDelegator.GetLogDelegate()(Log.LV_ERROR,e.Message);
result = false;
}
if (FIsValid())
{
FAudioOffset = (int)fs.Position; // we need that to rebuild the file if nedeed
FBitrate = Math.Round(((double)(FFileLength - FAudioOffset) / 1000) * 8 / FGetDuration()); //time to calculate average bitrate
}
else
{
result = false;
}
if (fs != null)
{
fs.Unlock(0, fs.Length);
fs.Close();
}
return(result);
}
