internal static void SetColourFx(this MmalCameraComponent camera, ColorEffects colorFx)
{
MmalLog.Logger.LogDebug("Setting colour effects");
var(_, u, v) = MmalColor.RgbToYuvBytes(colorFx.Color);
var colFx = new MmalParameterColorFxType(
new MmalParameterHeaderType(MmalParameterColorEffect, Marshal.SizeOf <MmalParameterColorFxType>()),
colorFx.Enable ? 1 : 0,
u,
v);
MmalCheck(MmalPort.SetParameter(camera.Control.Ptr, &colFx.Hdr), "Unable to set colour fx");
}
internal static void SetAnnotateSettings(this MmalCameraComponent camera)
{
if (CameraConfig.Annotate == null)
{
return;
}
var sb = new StringBuilder();
var showShutter = 0;
var showAnalogGain = 0;
var showLens = 0;
var showCaf = 0;
var showMotion = 0;
var showFrame = 0;
var enableTextBackground = 0;
var customTextColor = 0;
var customTextY = (byte)0;
var customTextU = (byte)0;
var customTextV = (byte)0;
var customBackgroundColor = 0;
var customBackgroundY = (byte)0;
var customBackgroundU = (byte)0;
var customBackgroundV = (byte)0;
var justify = CameraConfig.Annotate.Justify;
var xOffset = CameraConfig.Annotate.XOffset;
var yOffset = CameraConfig.Annotate.YOffset;
if (!string.IsNullOrEmpty(CameraConfig.Annotate.CustomText))
{
sb.Append(CameraConfig.Annotate.CustomText + " ");
}
if (CameraConfig.Annotate.ShowDateText)
{
sb.Append(DateTime.Now.ToString(CameraConfig.Annotate.DateFormat) + " ");
}
if (CameraConfig.Annotate.ShowTimeText)
{
sb.Append(DateTime.Now.ToString(CameraConfig.Annotate.TimeFormat) + " ");
}
if (CameraConfig.Annotate.ShowShutterSettings)
{
showShutter = 1;
}
if (CameraConfig.Annotate.ShowGainSettings)
{
showAnalogGain = 1;
}
if (CameraConfig.Annotate.ShowLensSettings)
{
showLens = 1;
}
if (CameraConfig.Annotate.ShowCafSettings)
{
showCaf = 1;
}
if (CameraConfig.Annotate.ShowMotionSettings)
{
showMotion = 1;
}
if (CameraConfig.Annotate.ShowFrameNumber)
{
showFrame = 1;
}
if (CameraConfig.Annotate.AllowCustomBackgroundColour)
{
enableTextBackground = 1;
}
var textSize = Convert.ToByte(CameraConfig.Annotate.TextSize);
if (CameraConfig.Annotate.TextColour != Color.Empty)
{
customTextColor = 1;
var(y, u, v) = MmalColor.RgbToYuvBytes(CameraConfig.Annotate.TextColour);
customTextY = y;
customTextU = u;
customTextV = v;
}
if (CameraConfig.Annotate.BgColour != Color.Empty)
{
customBackgroundColor = 1;
var(y, u, v) = MmalColor.RgbToYuvBytes(CameraConfig.Annotate.BgColour);
customBackgroundY = y;
customBackgroundU = u;
customBackgroundV = v;
}
// .NET Core has an issue with marshalling arrays "ByValArray". The array being passed MUST equal the size
// specified in the "SizeConst" field or you will receive an exception. Mono does not have this restriction
// and is quite happy to pass an array of a lower size if asked. In order to get around this, I am creating
// an array equaling "SizeConst" and copying the contents of the annotation text into it, minus the EOL character.
var text = sb.ToString() + char.MinValue;
var arr = new byte[MmalCameraAnnotateMaxTextLenV3];
var bytes = Encoding.ASCII.GetBytes(text);
Array.Copy(bytes, arr, bytes.Length);
var strV4 = new MmalParameterCameraAnnotateV4Type(
new MmalParameterHeaderType(MmalParameterAnnotate, Marshal.SizeOf <MmalParameterCameraAnnotateV4Type>() + (arr.Length - 1)),
1, showShutter, showAnalogGain, showLens,
showCaf, showMotion, showFrame, enableTextBackground,
customBackgroundColor, customBackgroundY, customBackgroundU, customBackgroundV, 0, customTextColor,
customTextY, customTextU, customTextV, textSize, arr, (int)justify, xOffset, yOffset);
var ptrV4 = Marshal.AllocHGlobal(Marshal.SizeOf <MmalParameterCameraAnnotateV4Type>() + (arr.Length - 1));
Marshal.StructureToPtr(strV4, ptrV4, false);
try
{
MmalCheck(MmalPort.SetParameter(camera.Control.Ptr, (MmalParameterHeaderType *)ptrV4), "Unable to set annotate");
}
catch
{
Marshal.FreeHGlobal(ptrV4);
ptrV4 = IntPtr.Zero;
MmalLog.Logger.LogWarning("Unable to set V4 annotation structure. Trying V3. Please update firmware to latest version.");
var str = new MmalParameterCameraAnnotateV3Type(
new MmalParameterHeaderType(MmalParameterAnnotate, Marshal.SizeOf <MmalParameterCameraAnnotateV3Type>() + (arr.Length - 1)),
1, showShutter, showAnalogGain, showLens,
showCaf, showMotion, showFrame, enableTextBackground,
customBackgroundColor, customBackgroundY, customBackgroundU, customBackgroundV, 0, customTextColor,
customTextY, customTextU, customTextV, textSize, arr);
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf <MmalParameterCameraAnnotateV3Type>() + (arr.Length - 1));
Marshal.StructureToPtr(str, ptr, false);
try
{
MmalCheck(MmalPort.SetParameter(camera.Control.Ptr, (MmalParameterHeaderType *)ptr), "Unable to set annotate V3.");
}
finally
{
Marshal.FreeHGlobal(ptr);
}
}
finally
{
if (ptrV4 != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrV4);
}
}
}