/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
public override void Write(byte[] buffer, int offset, int count)
{
while (count > 0)
{
if (m_buffer == null)
{
m_buffer = m_pool.GetFreeBuffer();
m_index = 0;
}
//
// Write up to the end of this buffer
//
int remaining = m_sector_count * m_sector_size - m_index;
if (remaining > count)
{
remaining = count;
}
IntPtr dest = new IntPtr(m_buffer.BufferPtr.ToInt32() + m_index);
Marshal.Copy(buffer, offset, dest, remaining);
m_index += remaining;
m_length += remaining;
count -= remaining;
offset += remaining;
if (m_index == m_sector_count * m_sector_size)
{
m_buffer.DataSize = m_index / m_sector_size;
m_buffer.SectorSize = m_sector_size;
m_buffer.LogicalBlockAddress = m_lba;
m_buffer.SourceString = "WriteBufferStream, Write method";
m_lba = long.MaxValue;
m_pool.SendBufferToDevice(m_buffer);
m_buffer = null;
}
}
}
/// <summary>
/// This is a stream class that writes the data to the write buffer pool to be sent
/// down to the CD/DVD device.
/// </summary>
/// <param name="pool">the buffer pool to get pages from and send data to</param>
/// <param name="sector_size">the size of the sectors to buffer</param>
/// <param name="lba">the logical block address for the first block from this stream</param>
public WriteBufferStream(WriteBufferPool pool, int sector_size, long lba)
{
m_length = 0;
m_pool = pool;
m_buffer = null;
m_index = 0;
m_sector_size = sector_size;
m_sector_count = m_pool.PageSize / m_sector_size;
m_closing = false;
m_lba = lba;
}
/// <summary>
/// Add a buffer back to the free list to be used again
/// </summary>
/// <param name="buf">the buffer to add to the list</param>
public void FreeWriteBuffer(WriteBuffer buf)
{
lock (m_free_list_lock)
{
m_free_list.Add(buf);
}
}
/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
public override void Write(byte[] buffer, int offset, int count)
{
while (count > 0)
{
if (m_buffer == null)
{
m_buffer = m_pool.GetFreeBuffer();
m_index = 0;
}
//
// Write up to the end of this buffer
//
int remaining = m_sector_count * m_sector_size - m_index;
if (remaining > count)
remaining = count;
IntPtr dest = new IntPtr(m_buffer.BufferPtr.ToInt32() + m_index);
Marshal.Copy(buffer, offset, dest, remaining);
m_index += remaining;
m_length += remaining;
count -= remaining ;
offset += remaining ;
if (m_index == m_sector_count * m_sector_size)
{
m_buffer.DataSize = m_index / m_sector_size;
m_buffer.SectorSize = m_sector_size;
m_buffer.LogicalBlockAddress = m_lba;
m_buffer.SourceString = "WriteBufferStream, Write method";
m_lba = long.MaxValue;
m_pool.SendBufferToDevice(m_buffer);
m_buffer = null;
}
}
}
/// <summary>
/// Add a buffer to the list
/// </summary>
/// <param name="buf"></param>
public void SendBufferToDevice(WriteBuffer buf)
{
lock (m_buffer_list_lock)
{
if (m_mult != 0 && ((buf.DataSize % m_mult) != 0))
System.Diagnostics.Debug.WriteLine("Added a block of " + buf.DataSize.ToString() + " blocks, not an event multiple") ;
m_buffer_list.Add(buf);
m_produced += (int)buf.DataSize;
}
}
