public override long Seek(long offset, SeekOrigin origin)
{
MemoryStream ms = WAVIrrKlangFileFactory.PrepareStream(Name, ID);
long p = ms.Seek(offset, origin);
WAVIrrKlangFileFactory.SavePos(Name, ID);
return(p);
}
/// <summary>
/// Contructor, resets loop information, also calls base constructor
/// </summary>
/// <param name="filename">Name of the file to be streamed</param>
public WAVFileStream(String filename)
// : base(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)
{
Name = filename;
#if DEBUGOPENCLOSE1
Console.WriteLine("(Using file: " + this.Name.Substring(this.Name.LastIndexOf('\\')) + ")");
#endif
_isShouldFinish = true;
_isInInternalLoop = false;
LoopCount = 1;
WAVIrrKlangFileFactory.EnsureStream(Name);
ID = lastID++;
WAVIrrKlangFileFactory.SavePos(Name, ID);
}
/// <summary>
/// Overriden Read, it handles basic info reading, also emulate loop
/// </summary>
/// <param name="array">Where to read bytes</param>
/// <param name="offset">Offset in array</param>
/// <param name="count">Number of bytes to read</param>
/// <returns></returns>
public override int Read(byte[] array, int offset, int count)
{
_ms = WAVIrrKlangFileFactory.PrepareStream(Name, ID);
int rdb = 0;
byte[] preread = new byte[4];
try
{
// Check the overread case, if trying to read after the second marker or the end of the file
if (LoopedEndPosition != 0 && (_ms.Position + count > LoopedEndPosition))
{
// Just for sure, reverse check, if already overrun
if (LoopedEndPosition - _ms.Position > 0)
{
rdb = _ms.Read(array, offset, (int)(LoopedEndPosition - _ms.Position));
}
}
else
{
if (count < 4)
{
#if DEBUGSCR
Console.WriteLine("(Now using preread on file {0})", this.Name.Substring(this.Name.LastIndexOf('\\')));
#endif
rdb = _ms.Read(preread, 0, 4);
_ms.Seek(4 - count, SeekOrigin.Current);
for (int i = 0; i < count; i++)
{
array[i] = preread[i];
}
}
else
{
// May read without problems
rdb = _ms.Read(array, offset, count);
for (int i = 0; i < (rdb >= 4 ? 4 : count); i++)
{
preread[i] = array[i];
}
}
}
// Length operation functions and CUE read
#region Length and CUE operations
// Previously set flag if the length of the wav will be the next info
if (_isNextLength)
{
#if DEBUGSCR
Console.WriteLine("Using file: " + Name.Substring(Name.LastIndexOf('\\')));
#endif
// Store the original legth
_InternalLength = FromArray(array);
// Set the provided length to an enough high number - it's more than six hours
array[0] = 0;
array[1] = 0;
array[2] = 0;
array[3] = 0xF0;
// Reset flag and store the positions
// Also set markers to default
_isNextLength = false;
_AbsoluteBeginPosition = _ms.Position;
_Marker1Position = 0;
_Marker2Position = _InternalLength;
// Load cue info
FindCUE();
}
// data, nex is length
//else if (count == 4 && array[0] == 100 && array[1] == 97 && array[2] == 116 && array[3] == 97)
else if (preread[0] == 100 && preread[1] == 97 && preread[2] == 116 && preread[3] == 97)
{
_isNextLength = true;
}
// fmt, may read the BPS
else if (preread[0] == 102 && preread[1] == 109 && preread[2] == 116)
{
long pos = _ms.Position;
_ms.Seek(6, SeekOrigin.Current);
_SPS = (int)FromReadArray(2);
_ms.Seek(10, SeekOrigin.Current);
_BPS = (int)FromReadArray(2) / 8;
_ms.Seek(pos, SeekOrigin.Begin);
}
#endregion
// Check if loop, if is, read the rest to the buffer from the begining
// If not, it is the end of the loop, so no more data
while (count > rdb && !_isShouldFinish)
{
LoopCount++;
_ms.Seek(BeginPosition, SeekOrigin.Begin);
//rdb += base.Read(array, offset + rdb, count - rdb);
// Check the overread case, if trying to read after the second marker or the end of the file
if (LoopedEndPosition != 0 && (_ms.Position + (count - rdb) > LoopedEndPosition))
{
// Just for sure, reverse check, if already overrun
if (LoopedEndPosition - _ms.Position > 0)
{
rdb += _ms.Read(array, offset + rdb, (int)(LoopedEndPosition - _ms.Position));
}
}
else
{
// May read without problems
rdb += _ms.Read(array, offset + rdb, count - rdb);
}
}
if (count > rdb && _isShouldFinish && _ms.Position < LoopedEndPosition)
{
rdb += _ms.Read(array, offset + rdb, (int)(LoopedEndPosition - _ms.Position));
}
isPlaying = rdb != 0;
// return the read bytes number, if less than expected, it will indicate the end of the stream
return(rdb);
}
#if DEBUGSCR
catch (Exception e)
{
Console.WriteLine("Exception caught on file {0}.", this.Name.Substring(this.Name.LastIndexOf('\\')));
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
return(rdb);
}
#else
catch (Exception)
{
return(rdb);
}
#endif
finally
{
WAVIrrKlangFileFactory.SavePos(Name, ID);
}
}
