Пример #1
0
        public bool TryGetValues(IntPtr cameraMetadataHandle,
                                 CameraMetadataTag tag, List <CameraMetadataValue> resultList)
        {
            IntPtr ndkMetadataHandle = IntPtr.Zero;

            ExternApi.ArImageMetadata_getNdkCameraMetadata(m_NativeSession.SessionHandle,
                                                           cameraMetadataHandle, ref ndkMetadataHandle);

            resultList.Clear();
            NdkCameraMetadata entry  = new NdkCameraMetadata();
            NdkCameraStatus   status =
                ExternApi.ACameraMetadata_getConstEntry(ndkMetadataHandle, tag, ref entry);

            if (status != NdkCameraStatus.Ok)
            {
                ARDebug.LogErrorFormat(
                    "ACameraMetadata_getConstEntry error with native camera error code: {0}",
                    status);
                return(false);
            }

            if (entry.Count > k_MaximumTagCountForWarning && !m_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);
                m_WarningTags.Add((int)tag);
            }

            for (int i = 0; i < entry.Count; i++)
            {
                switch (entry.Type)
                {
                case NdkCameraMetadataType.Byte:
                    sbyte byteValue = (sbyte)Marshal.PtrToStructure(
                        MarshalingHelper.GetPtrToUnmanagedArrayElement <sbyte>(entry.Value, i),
                        typeof(sbyte));
                    resultList.Add(new CameraMetadataValue(byteValue));
                    break;

                case NdkCameraMetadataType.Int32:
                    int intValue = (int)Marshal.PtrToStructure(
                        MarshalingHelper.GetPtrToUnmanagedArrayElement <int>(entry.Value, i),
                        typeof(int));
                    resultList.Add(new CameraMetadataValue(intValue));
                    break;

                case NdkCameraMetadataType.Float:
                    float floatValue = (float)Marshal.PtrToStructure(
                        MarshalingHelper.GetPtrToUnmanagedArrayElement <float>(entry.Value, i),
                        typeof(float));
                    resultList.Add(new CameraMetadataValue(floatValue));
                    break;

                case NdkCameraMetadataType.Int64:
                    long longValue = (long)Marshal.PtrToStructure(
                        MarshalingHelper.GetPtrToUnmanagedArrayElement <long>(entry.Value, i),
                        typeof(long));
                    resultList.Add(new CameraMetadataValue(longValue));
                    break;

                case NdkCameraMetadataType.Double:
                    double doubleValue = (double)Marshal.PtrToStructure(
                        MarshalingHelper.GetPtrToUnmanagedArrayElement <double>(entry.Value, i),
                        typeof(double));
                    resultList.Add(new CameraMetadataValue(doubleValue));
                    break;

                case NdkCameraMetadataType.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);
        }
Пример #2
0
 public static extern NdkCameraStatus ACameraMetadata_getConstEntry(
     IntPtr ndkCameraMetadata, CameraMetadataTag tag, ref NdkCameraMetadata entry);