/// <summary>
/// Read the digital data of the track
/// </summary>
/// <param name="track">Track to read</param>
/// <param name="OnDataRead">Call each time data is read</param>
/// <param name="StartSecond">First second of the track to read, 0 means to start at beginning of the track</param>
/// <param name="Seconds2Read">Number of seconds to read, 0 means to read until the end of the track</param>
/// <param name="OnProgress">Delegate to indicate the reading progress</param>
/// <returns>Negative value means an error. On success returns the number of bytes read</returns>
public int ReadTrack(int track, CdDataReadEventHandler DataReadEvent, uint StartSecond, uint Seconds2Read, CdReadProgressEventHandler ProgressEvent)
{
if ( TocValid && (track >= Toc.FirstTrack) && (track <= Toc.LastTrack) && (DataReadEvent != null) )
{
int StartSect = GetStartSector(track);
int EndSect = GetEndSector(track);
if ( (StartSect += (int)StartSecond*75) >= EndSect )
{
StartSect -= (int)StartSecond*75;
}
if ( (Seconds2Read > 0) && ( (int)(StartSect + Seconds2Read*75) < EndSect ) )
{
EndSect = StartSect + (int)Seconds2Read*75;
}
uint Bytes2Read = (uint)(EndSect - StartSect)*CB_AUDIO;
uint BytesRead = 0;
byte[] Data = new byte[CB_AUDIO*NSECTORS];
bool Cont = true;
bool ReadOk = true;
if ( ProgressEvent != null )
{
ReadProgressEventArgs rpa = new ReadProgressEventArgs(Bytes2Read, 0);
ProgressEvent(this, rpa);
Cont = !rpa.CancelRead;
}
for (int sector = StartSect; (sector < EndSect) && (Cont) && (ReadOk); sector+=NSECTORS)
{
int Sectors2Read = ( (sector + NSECTORS) < EndSect )?NSECTORS:(EndSect-sector);
ReadOk = ReadSector(sector, Data, Sectors2Read);
if ( ReadOk )
{
DataReadEventArgs dra = new DataReadEventArgs(Data, (uint)(CB_AUDIO*Sectors2Read));
DataReadEvent(this, dra);
BytesRead += (uint)(CB_AUDIO*Sectors2Read);
if ( ProgressEvent != null )
{
ReadProgressEventArgs rpa = new ReadProgressEventArgs(Bytes2Read, BytesRead);
ProgressEvent(this, rpa);
Cont = !rpa.CancelRead;
}
}
}
if ( ReadOk )
{
return (int)BytesRead;
}
else
{
return -1;
}
}
else
{
return -1;
}
}
public void OnCdDataRead(object sender, DataReadEventArgs ea)
{
Buffer.BlockCopy(ea.Data, 0, BufferArray, WritePosition, (int)ea.DataSize);
WritePosition += (int)ea.DataSize;
}
