protected override void Dispose(bool disposing)
{
if (_inputStream is object)
{
_inputStream.Close();
_inputStream.Dispose();
_inputStream = null;
}
if (_outputStream is object)
{
_outputStream.Close();
_outputStream.Unschedule(NSRunLoop.Current, NSRunLoop.NSDefaultRunLoopMode);
_outputStream.Dispose();
_outputStream = null;
}
base.Dispose(disposing);
}
public void Close()
{
_outputStream?.Close();
}
IObservable<Unit> SaveFullResolutionImageToFile (FileRequest request)
{
return Observable.Create<Unit> (o => {
var description = request.DescriptionAs<AssetDescription> ();
var disp = new CancellationDisposable ();
var token = disp.Token;
GetAsset (description, token).ContinueWith (t => {
using (File.Create (request.Filename))
using (var asset = t.Result)
using (var representation = asset.DefaultRepresentation)
using (var stream = new NSOutputStream (request.Filename, true)) {
stream.Open ();
long offset = 0;
uint bytesRead = 0;
NSError err;
// A large enough buffer that shouldn't cause memory warnings
byte [] buffer = new byte [131072];
GCHandle handle = GCHandle.Alloc (buffer, GCHandleType.Pinned);
IntPtr pointer = handle.AddrOfPinnedObject ();
unsafe {
while (offset < representation.Size && stream.HasSpaceAvailable ()) {
bytesRead = representation.GetBytes (pointer, offset, (uint)buffer.Length, out err);
stream.Write (buffer, bytesRead);
offset += bytesRead;
}
}
stream.Close ();
handle.Free ();
}
o.OnCompleted ();
}, token).RouteExceptions (o);
return disp;
});
}