public bool TryGetValues(IntPtr cameraMetadataHandle,
CameraMetadataTag tag, List <CameraMetadataValue> resultList)
{
resultList.Clear();
uint utag = (uint)tag;
ArCameraMetadata entry = new ArCameraMetadata();
ApiArStatus status =
ExternApi.ArImageMetadata_getConstEntry(_nativeSession.SessionHandle,
cameraMetadataHandle, utag,
ref entry);
if (status != ApiArStatus.Success)
{
ARDebug.LogErrorFormat(
"ArImageMetadata_getConstEntry error with native camera error code: {0}",
status);
return(false);
}
if (entry.Count > _maximumTagCountForWarning && !_warningTags.Contains((int)tag))
{
Debug.LogWarningFormat(
"TryGetValues for tag {0} has {1} values. Accessing tags with a large " +
"number of values may impede performance.", tag, entry.Count);
_warningTags.Add((int)tag);
}
for (int i = 0; i < entry.Count; i++)
{
switch (entry.Type)
{
case ArCameraMetadataType.Byte:
sbyte byteValue = (sbyte)Marshal.PtrToStructure(
MarshalingHelper.GetPtrToUnmanagedArrayElement <sbyte>(entry.Value, i),
typeof(sbyte));
resultList.Add(new CameraMetadataValue(byteValue));
break;
case ArCameraMetadataType.Int32:
int intValue = (int)Marshal.PtrToStructure(
MarshalingHelper.GetPtrToUnmanagedArrayElement <int>(entry.Value, i),
typeof(int));
resultList.Add(new CameraMetadataValue(intValue));
break;
case ArCameraMetadataType.Float:
float floatValue = (float)Marshal.PtrToStructure(
MarshalingHelper.GetPtrToUnmanagedArrayElement <float>(entry.Value, i),
typeof(float));
resultList.Add(new CameraMetadataValue(floatValue));
break;
case ArCameraMetadataType.Int64:
long longValue = (long)Marshal.PtrToStructure(
MarshalingHelper.GetPtrToUnmanagedArrayElement <long>(entry.Value, i),
typeof(long));
resultList.Add(new CameraMetadataValue(longValue));
break;
case ArCameraMetadataType.Double:
double doubleValue = (double)Marshal.PtrToStructure(
MarshalingHelper.GetPtrToUnmanagedArrayElement <double>(entry.Value, i),
typeof(double));
resultList.Add(new CameraMetadataValue(doubleValue));
break;
case ArCameraMetadataType.Rational:
CameraMetadataRational rationalValue =
(CameraMetadataRational)Marshal.PtrToStructure(
MarshalingHelper
.GetPtrToUnmanagedArrayElement <CameraMetadataRational>(
entry.Value, i),
typeof(CameraMetadataRational));
resultList.Add(new CameraMetadataValue(rationalValue));
break;
default:
return(false);
}
}
return(true);
}
public static extern ApiArStatus ArImageMetadata_getConstEntry(
IntPtr session, IntPtr image_metadata, uint tag,
ref ArCameraMetadata out_metadata_entry);
