internal PreviewFrame(IntPtr ptr, ref PinnedPreviewBuffer <byte> buffers)
{
var unmanagedStruct = Marshal.PtrToStructure <CameraPreviewDataStruct>(ptr);
Format = unmanagedStruct.Format;
Resolution = new Size(unmanagedStruct.Width, unmanagedStruct.Height);
TimeStamp = unmanagedStruct.TimeStamp;
PlaneType = GetPlaneType(unmanagedStruct);
CreatePlane(unmanagedStruct, ref buffers);
}
internal void CreatePlane(CameraPreviewDataStruct unmanagedStruct, ref PinnedPreviewBuffer <byte> buffers)
{
switch (PlaneType)
{
case PlaneType.SinglePlane:
var singlePlane = unmanagedStruct.Plane.SinglePlane;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
buffers = new PinnedPreviewBuffer <byte>(singlePlane.DataLength);
}
Marshal.Copy(singlePlane.Data, buffers[0], 0, (int)singlePlane.DataLength);
Plane = new SinglePlane(buffers[0]);
break;
case PlaneType.DoublePlane:
var doublePlane = unmanagedStruct.Plane.DoublePlane;
doublePlane.YLength = (uint)(Resolution.Width * Resolution.Height);
doublePlane.UVLength = (uint)(Resolution.Width * Resolution.Height) / 2;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
buffers = new PinnedPreviewBuffer <byte>(doublePlane.YLength, doublePlane.UVLength);
}
Marshal.Copy(doublePlane.Y, buffers[0], 0, (int)doublePlane.YLength);
Marshal.Copy(doublePlane.UV, buffers[1], 0, (int)doublePlane.UVLength);
Plane = new DoublePlane(buffers[0], buffers[1]);
break;
case PlaneType.TriplePlane:
var triplePlane = unmanagedStruct.Plane.TriplePlane;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
buffers = new PinnedPreviewBuffer <byte>(triplePlane.YLength, triplePlane.ULength, triplePlane.VLength);
}
Marshal.Copy(triplePlane.Y, buffers[0], 0, (int)triplePlane.YLength);
Marshal.Copy(triplePlane.U, buffers[1], 0, (int)triplePlane.ULength);
Marshal.Copy(triplePlane.V, buffers[2], 0, (int)triplePlane.VLength);
Plane = new TriplePlane(buffers[0], buffers[1], buffers[2]);
break;
case PlaneType.EncodedPlane:
var encodedPlane = unmanagedStruct.Plane.EncodedPlane;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
// We take buffer margin to avoid reallocation as much as possible.
buffers = new PinnedPreviewBuffer <byte>(encodedPlane.DataLength * _variableBufferMargin);
}
Marshal.Copy(encodedPlane.Data, buffers[0], 0, (int)encodedPlane.DataLength);
Plane = new EncodedPlane(buffers[0], encodedPlane.IsDeltaFrame);
break;
case PlaneType.DepthPlane:
var depthPlane = unmanagedStruct.Plane.DepthPlane;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
buffers = new PinnedPreviewBuffer <byte>(depthPlane.DataLength);
}
Marshal.Copy(depthPlane.Data, buffers[0], 0, (int)depthPlane.DataLength);
Plane = new DepthPlane(buffers[0]);
break;
case PlaneType.RgbPlane:
var rgbPlane = unmanagedStruct.Plane.RgbPlane;
if (buffers == null || CheckReallocation(unmanagedStruct, ref buffers))
{
buffers = new PinnedPreviewBuffer <byte>(rgbPlane.DataLength);
}
Marshal.Copy(rgbPlane.Data, buffers[0], 0, (int)rgbPlane.DataLength);
Plane = new RgbPlane(buffers[0]);
break;
default:
Debug.Fail("Unknown preview data!");
break;
}
}
internal bool CheckReallocation(CameraPreviewDataStruct unmanagedStruct, ref PinnedPreviewBuffer <byte> buffers)
{
bool isReallocation = false;
switch (PlaneType)
{
case PlaneType.SinglePlane:
var singlePlane = unmanagedStruct.Plane.SinglePlane;
if (buffers[0].Length < singlePlane.DataLength)
{
isReallocation = true;
}
break;
case PlaneType.DoublePlane:
var doublePlane = unmanagedStruct.Plane.DoublePlane;
doublePlane.YLength = (uint)(Resolution.Width * Resolution.Height);
doublePlane.UVLength = (uint)(Resolution.Width * Resolution.Height) / 2;
if (buffers[0].Length < doublePlane.YLength || buffers[1].Length < doublePlane.UVLength)
{
isReallocation = true;
}
break;
case PlaneType.TriplePlane:
var triplePlane = unmanagedStruct.Plane.TriplePlane;
if (buffers[0].Length < triplePlane.YLength || buffers[1].Length < triplePlane.ULength || buffers[2].Length < triplePlane.VLength)
{
isReallocation = true;
}
break;
case PlaneType.EncodedPlane:
var encodedPlane = unmanagedStruct.Plane.EncodedPlane;
if (buffers[0].Length < encodedPlane.DataLength)
{
Log.Debug(CameraLog.Tag, $"Cur size:{buffers[0].Length} -> New size:{encodedPlane.DataLength * _variableBufferMargin}");
isReallocation = true;
}
break;
case PlaneType.DepthPlane:
var depthPlane = unmanagedStruct.Plane.DepthPlane;
if (buffers[0].Length < depthPlane.DataLength)
{
isReallocation = true;
}
break;
case PlaneType.RgbPlane:
var rgbPlane = unmanagedStruct.Plane.RgbPlane;
if (buffers[0].Length < rgbPlane.DataLength)
{
isReallocation = true;
}
break;
default:
Debug.Fail("Unknown preview data!");
break;
}
if (isReallocation)
{
Log.Debug(CameraLog.Tag, "Reallocate preview buffer.");
// Dispose current buffer to free GCHandle.
buffers.Dispose();
}
return(isReallocation);
}