private void HoldLastBlock(IntPtr pBlockHandle, LibVLCAccess.block_t block, int offset)
{
if (IntPtr.Zero != pBlockHandle)
{
if (offset < block.i_buffer)
{
_LastBlockHandle = pBlockHandle;
_LastBlock = block;
_LastBlockOffset = offset;
}
else
{
ReleaseBlock(pBlockHandle, block);
}
}
}
private void Init(byte[] data, int length)
{
_ptrBlock = Marshal.AllocHGlobal(BlockStructSize);
_handle = GCHandle.Alloc(data, GCHandleType.Pinned);
IntPtr ptrBuffer = _handle.AddrOfPinnedObject();
//Marshal.WriteInt32(ptr + 5 * 8, Length);
//Marshal.WriteIntPtr(ptr + 5 * 8 + 4, ptrBuffer);
LibVLCAccess.block_t vlcblock = new LibVLCAccess.block_t();
vlcblock.i_buffer = data.Length;
vlcblock.p_buffer = ptrBuffer;
Marshal.StructureToPtr(vlcblock, _ptrBlock, false);
//Marshal.WriteInt32(ptr + 6 * 8 + 4, GetAllocSize());
}
protected IntPtr ReadBlock(out LibVLCAccess.block_t block)
{
if (IntPtr.Zero == _AccessVLCObject)
{
throw new ObjectDisposedException("AccessVLCObject");
}
IntPtr pBlock = InvokeImport.InvokeFunc(_funcReadBlock, _AccessVLCObject);
if (IntPtr.Zero != pBlock)
{
block = (LibVLCAccess.block_t)Marshal.PtrToStructure(pBlock, typeof(LibVLCAccess.block_t));
}
else
{
block = new LibVLCAccess.block_t();
}
return pBlock;
}
private void ReleaseLastBuffer(bool disposing)
{
if (IntPtr.Zero != _LastBlockHandle)
{
ReleaseBlock(_LastBlockHandle, _LastBlock);
_LastBlockHandle = IntPtr.Zero;
if (disposing)
{
_LastBlock = new LibVLCAccess.block_t();
}
_LastBlockOffset = 0;
}
}