onnxruntime/csharp/test/Microsoft.ML.OnnxRuntime.Tests.Common/TestDataLoader.cs
Dmitri Smirnov 1e18efade5
[C#] Add ML Sequences and Maps Create and Process APIs (#16648)
### Description
1) Added Sequence And Maps convenience APIs to create input Sequences
and Maps
and also visit the outputs.

2) Address OrtValue design issue when the values are created on top of
the
managed memory and the ortValues are used for sequence and maps
creation.
We should retain the original managed instances that keep the memory
pinned.
We opt to keep track of those and dispose of them within an instance of
OrtValue
that represents a Map or a Sequence.

3) Set `LangVersion` to default per [MS Versioning
Docs.](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/configure-language-version)

### Motivation and Context
1) When writing code examples, use of Map and Sequences API proved to be
cumbersome.
2) It is a BUG, that we should address, as the managed memory can move
by the GC and lead to
intermittent crashes.
3) Make use of the most feature of the C#.
2023-07-21 12:58:29 +08:00

621 lines
30 KiB
C#

using Microsoft.ML.OnnxRuntime.Tensors;
using System;
using System.Buffers;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Xunit;
namespace Microsoft.ML.OnnxRuntime.Tests
{
// Copy of the class that is internal in the main package
public class DisposableListTest<T> : List<T>, IDisposableReadOnlyCollection<T>
where T : IDisposable
{
public DisposableListTest()
{ }
public DisposableListTest(IEnumerable<T> enumerable) : base(enumerable)
{ }
public DisposableListTest(int count)
: base(count)
{ }
#region IDisposable Support
private bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
// Dispose in the reverse order.
// Objects should typically be destroyed/disposed
// in the reverse order of its creation
// especially if the objects created later refer to the
// objects created earlier. For homogeneous collections of objects
// it would not matter.
for (int i = this.Count - 1; i >= 0; --i)
{
this[i]?.Dispose();
}
this.Clear();
}
disposedValue = true;
}
}
// This code added to correctly implement the disposable pattern.
public void Dispose()
{
// Do not change this code. Put cleanup code in Dispose(bool disposing) above.
Dispose(true);
GC.SuppressFinalize(this);
}
#endregion
}
internal struct DisposableTestPair<TValue> : IDisposable
where TValue : IDisposable
{
public string Key;
public TValue Value;
public DisposableTestPair(string key, TValue value)
{
Key = key;
Value = value;
}
public void Dispose()
{
Value?.Dispose();
}
}
internal static class TestDataLoader
{
internal static byte[] LoadModelFromEmbeddedResource(string path)
{
var assembly = typeof(TestDataLoader).Assembly;
byte[] model = null;
var resourceName = assembly.GetManifestResourceNames().Single(p => p.EndsWith("." + path));
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
{
using (MemoryStream memoryStream = new MemoryStream())
{
stream.CopyTo(memoryStream);
model = memoryStream.ToArray();
}
}
return model;
}
internal static float[] LoadTensorFromEmbeddedResource(string path)
{
var tensorData = new List<float>();
var assembly = typeof(TestDataLoader).Assembly;
var resourceName = assembly.GetManifestResourceNames().Single(p => p.EndsWith("." + path));
using (StreamReader inputFile = new StreamReader(assembly.GetManifestResourceStream(resourceName)))
{
inputFile.ReadLine(); // skip the input name
string[] dataStr = inputFile.ReadLine().Split(new char[] { ',', '[', ']' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < dataStr.Length; i++)
{
tensorData.Add(Single.Parse(dataStr[i]));
}
}
return tensorData.ToArray();
}
static NamedOnnxValue LoadTensorPb(Onnx.TensorProto tensor, string nodeName, NodeMetadata nodeMeta)
{
if (nodeMeta.OnnxValueType != OnnxValueType.ONNX_TYPE_TENSOR)
{
throw new InvalidDataException($"Metadata for: '{nodeName}' has a type: '{nodeMeta.OnnxValueType}'" +
$" but loading as tensor: '{tensor.Name}'");
}
var protoDt = (Tensors.TensorElementType)tensor.DataType;
var metaElementType = nodeMeta.ElementDataType;
if (!((protoDt == metaElementType) ||
(protoDt == TensorElementType.UInt16 &&
(metaElementType == TensorElementType.BFloat16 || metaElementType == TensorElementType.Float16))))
throw new InvalidDataException($"For node: '{nodeName}' metadata expects: '{metaElementType}' but loaded loaded tensor type: '{protoDt}'");
// Tensors within Sequences may have no dimensions as the standard allows
// different dimensions for each tensor element of the sequence
if (nodeMeta.Dimensions.Length > 0 && nodeMeta.Dimensions.Length != tensor.Dims.Count)
{
throw new InvalidDataException($"node: '{nodeName}' nodeMeta.Dim.Length: {nodeMeta.Dimensions.Length} " +
$"is expected to be equal to tensor.Dims.Count {tensor.Dims.Count}");
}
var intDims = new int[tensor.Dims.Count];
for (int i = 0; i < tensor.Dims.Count; i++)
{
intDims[i] = (int)tensor.Dims[i];
}
for (int i = 0; i < nodeMeta.Dimensions.Length; i++)
{
if ((nodeMeta.Dimensions[i] != -1) && (nodeMeta.Dimensions[i] != tensor.Dims[i]))
throw new InvalidDataException($"Node: '{nodeName}' dimension at idx {i} is {nodeMeta.Dimensions}[{i}] " +
$"is expected to either be -1 or {tensor.Dims[i]}");
}
// element type for Float16 and BFloat16 in the loaded tensor would always be uint16, so
// we want to use element type from metadata
if (protoDt == TensorElementType.String)
return CreateNamedOnnxValueFromStringTensor(tensor.StringData, nodeName, intDims);
return CreateNamedOnnxValueFromTensorRawData(nodeName, tensor.RawData.Span, metaElementType, intDims);
}
internal static NamedOnnxValue CreateNamedOnnxValueFromTensorRawData(string nodeName, ReadOnlySpan<byte> rawData,
TensorElementType elementType, int[] intDims)
{
switch (elementType)
{
case TensorElementType.Float:
return CreateNamedOnnxValueFromRawData<float>(nodeName, rawData, intDims);
case TensorElementType.Double:
return CreateNamedOnnxValueFromRawData<double>(nodeName, rawData, intDims);
case TensorElementType.Int32:
return CreateNamedOnnxValueFromRawData<int>(nodeName, rawData, intDims);
case TensorElementType.UInt32:
return CreateNamedOnnxValueFromRawData<uint>(nodeName, rawData, intDims);
case TensorElementType.Int16:
return CreateNamedOnnxValueFromRawData<short>(nodeName, rawData, intDims);
case TensorElementType.UInt16:
return CreateNamedOnnxValueFromRawData<ushort>(nodeName, rawData, intDims);
case TensorElementType.Int64:
return CreateNamedOnnxValueFromRawData<long>(nodeName, rawData, intDims);
case TensorElementType.UInt64:
return CreateNamedOnnxValueFromRawData<ulong>(nodeName, rawData, intDims);
case TensorElementType.UInt8:
return CreateNamedOnnxValueFromRawData<byte>(nodeName, rawData, intDims);
case TensorElementType.Int8:
return CreateNamedOnnxValueFromRawData<sbyte>(nodeName, rawData, intDims);
case TensorElementType.Bool:
return CreateNamedOnnxValueFromRawData<bool>(nodeName, rawData, intDims);
case TensorElementType.Float16:
return CreateNamedOnnxValueFromRawData<Float16>(nodeName, rawData, intDims);
case TensorElementType.BFloat16:
return CreateNamedOnnxValueFromRawData<BFloat16>(nodeName, rawData, intDims);
case TensorElementType.String:
throw new ArgumentException("For string tensors of type use: CreateNamedOnnxValueFromStringTensor.");
default:
throw new NotImplementedException($"Tensors of type: {elementType} not currently supported by this function");
}
}
internal static NamedOnnxValue LoadTensorFromEmbeddedResourcePb(string path, string nodeName, NodeMetadata nodeMeta)
{
Onnx.TensorProto tensor = null;
var assembly = typeof(TestDataLoader).Assembly;
using (Stream stream = assembly.GetManifestResourceStream($"{assembly.GetName().Name}.TestData.{path}"))
{
tensor = Onnx.TensorProto.Parser.ParseFrom(stream);
}
return LoadTensorPb(tensor, nodeName, nodeMeta);
}
internal static NamedOnnxValue LoadOnnxValueFromFilePb(string fullFilename, string nodeName, NodeMetadata nodeMeta)
{
// No sparse tensor support yet
// Set buffer size to 4MB
const int readBufferSize = 4194304;
using (var file = new FileStream(fullFilename, FileMode.Open, FileAccess.Read, FileShare.Read, readBufferSize))
{
switch (nodeMeta.OnnxValueType)
{
case OnnxValueType.ONNX_TYPE_TENSOR:
{
var tensor = Onnx.TensorProto.Parser.ParseFrom(file);
return LoadTensorPb(tensor, nodeName, nodeMeta);
}
case OnnxValueType.ONNX_TYPE_SEQUENCE:
{
var sequence = Onnx.SequenceProto.Parser.ParseFrom(file);
return CreateNamedOnnxValueFromSequence(sequence, nodeName, nodeMeta);
}
case OnnxValueType.ONNX_TYPE_MAP:
{
throw new NotImplementedException(
"Map test data format requires clarification: https://github.com/onnx/onnx/issues/5072");
}
case OnnxValueType.ONNX_TYPE_OPTIONAL:
{
var opt = Onnx.OptionalProto.Parser.ParseFrom(file);
return CreateNamedOnnxValueFromOptional(opt, nodeName, nodeMeta);
}
default:
throw new NotImplementedException($"Unable to load value type: {nodeMeta.OnnxValueType} not implemented");
}
}
}
internal static DisposableTestPair<OrtValue> LoadOrtValueFromFilePb(string fullFilename, string nodeName, NodeMetadata nodeMeta)
{
// No sparse tensor support yet
// Set buffer size to 4MB
const int readBufferSize = 4194304;
using (var file = new FileStream(fullFilename, FileMode.Open, FileAccess.Read, FileShare.Read, readBufferSize))
{
switch (nodeMeta.OnnxValueType)
{
case OnnxValueType.ONNX_TYPE_TENSOR:
{
var tensor = Onnx.TensorProto.Parser.ParseFrom(file);
return new DisposableTestPair<OrtValue>(nodeName, LoadOrValueTensorPb(tensor, nodeName, nodeMeta));
}
case OnnxValueType.ONNX_TYPE_SEQUENCE:
{
var sequence = Onnx.SequenceProto.Parser.ParseFrom(file);
return new DisposableTestPair<OrtValue>(nodeName, CreateOrtValueFromSequence(sequence, nodeName, nodeMeta));
}
case OnnxValueType.ONNX_TYPE_MAP:
{
throw new NotImplementedException(
"Map test data format requires clarification: https://github.com/onnx/onnx/issues/5072");
}
case OnnxValueType.ONNX_TYPE_OPTIONAL:
{
var opt = Onnx.OptionalProto.Parser.ParseFrom(file);
return new DisposableTestPair<OrtValue>(nodeName, CreateOrtValueFromOptional(opt, nodeName, nodeMeta));
}
default:
throw new NotImplementedException($"Unable to load value type: {nodeMeta.OnnxValueType} not implemented");
}
}
}
private static void SequenceCheckMatchOnnxType(string nodeName, SequenceMetadata meta,
OnnxValueType onnxType)
{
if (meta.ElementMeta.OnnxValueType == onnxType)
return;
throw new InvalidDataException($"Sequence node: '{nodeName}' " +
$"has element type: '{onnxType}'" +
$" expected: '{meta.ElementMeta.OnnxValueType}'");
}
private static string MakeSequenceElementName(string nodeName, string seqName, int seqNum)
{
if (seqName.Length > 0)
return $"seq.{nodeName}.data.{seqName}.{seqNum}";
else
return $"seq.{nodeName}.data._.{seqNum}";
}
internal static NamedOnnxValue CreateNamedOnnxValueFromSequence(Onnx.SequenceProto sequence, string nodeName, NodeMetadata nodeMeta)
{
var sequenceMeta = nodeMeta.AsSequenceMetadata();
var elemMeta = sequenceMeta.ElementMeta;
int seqNum = 0;
var seqElemType = (Onnx.SequenceProto.Types.DataType)sequence.ElemType;
switch (seqElemType)
{
case Onnx.SequenceProto.Types.DataType.Tensor:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_TENSOR);
var sequenceOfTensors = new List<NamedOnnxValue>(sequence.TensorValues.Count);
foreach (var tensor in sequence.TensorValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
var namedOnnxValue = LoadTensorPb(tensor, elemName, elemMeta);
sequenceOfTensors.Add(namedOnnxValue);
}
return NamedOnnxValue.CreateFromSequence(nodeName, sequenceOfTensors);
}
case Onnx.SequenceProto.Types.DataType.Sequence:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_SEQUENCE);
var seqOfSequences = new List<NamedOnnxValue>(sequence.SequenceValues.Count);
foreach (var s in sequence.SequenceValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
seqOfSequences.Add(CreateNamedOnnxValueFromSequence(s, elemName, elemMeta));
}
return NamedOnnxValue.CreateFromSequence(nodeName, seqOfSequences);
}
case Onnx.SequenceProto.Types.DataType.Map:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_MAP);
var seqOfMaps = new List<NamedOnnxValue>(sequence.MapValues.Count);
foreach (var m in sequence.MapValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
seqOfMaps.Add(CreateNamedOnnxValueFromMap(m, elemName, elemMeta));
}
return NamedOnnxValue.CreateFromSequence(nodeName, seqOfMaps);
}
case Onnx.SequenceProto.Types.DataType.Optional:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_OPTIONAL);
var seqOfOpts = new List<NamedOnnxValue>(sequence.OptionalValues.Count);
foreach (var opt in sequence.OptionalValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
seqOfOpts.Add(CreateNamedOnnxValueFromOptional(opt, elemName, elemMeta));
}
return NamedOnnxValue.CreateFromSequence(nodeName, seqOfOpts);
}
default:
throw new NotImplementedException($"Sequence test data loading does not support element type: " +
$"'{seqElemType}'");
}
}
internal static NamedOnnxValue CreateNamedOnnxValueFromMap(Onnx.MapProto map, string nodeName, NodeMetadata nodeMetadata)
{
// See GH issue https://github.com/onnx/onnx/issues/5072
throw new NotImplementedException($"Loading map node: '{nodeName}' not implemented yet");
}
internal static NamedOnnxValue CreateNamedOnnxValueFromOptional(Onnx.OptionalProto optional, string nodeName, NodeMetadata nodeMetadata)
{
var meta = nodeMetadata.AsOptionalMetadata().ElementMeta;
switch ((Onnx.OptionalProto.Types.DataType)optional.ElemType)
{
case Onnx.OptionalProto.Types.DataType.Tensor:
{
var tensor = optional.TensorValue;
return LoadTensorPb(tensor, nodeName, meta);
}
case Onnx.OptionalProto.Types.DataType.Sequence:
{
var sequence = optional.SequenceValue;
return CreateNamedOnnxValueFromSequence(sequence, nodeName, meta);
}
case Onnx.OptionalProto.Types.DataType.Map:
{
var map = optional.MapValue;
return CreateNamedOnnxValueFromMap(map, nodeName, meta);
}
case Onnx.OptionalProto.Types.DataType.Optional:
throw new NotImplementedException($"Unable to load '{nodeName}' optional contained within optional");
default:
// Test data contains OptionalProto with the contained element type undefined.
// the premise is, if the element is not fed as an input, we should not care
// what Onnx type it is. However, we do not need to support AFAIK such inputs
// since the value for them could never be supplied.
throw new NotImplementedException($"Unable to load '{nodeName}' optional element type of: {(Onnx.OptionalProto.Types.DataType)optional.ElemType} type");
}
}
internal static NamedOnnxValue CreateNamedOnnxValueFromRawData<T>(string name, ReadOnlySpan<byte> rawData,
int[] dimensions)
where T : struct
{
var typedSrcSpan = MemoryMarshal.Cast<byte, T>(rawData);
var dt = new DenseTensor<T>(typedSrcSpan.ToArray(), dimensions);
return NamedOnnxValue.CreateFromTensor<T>(name, dt);
}
static OrtValue LoadOrValueTensorPb(Onnx.TensorProto tensor, string nodeName, NodeMetadata nodeMeta)
{
if (nodeMeta.OnnxValueType != OnnxValueType.ONNX_TYPE_TENSOR)
{
throw new InvalidDataException($"Metadata for: '{nodeName}' has a type: '{nodeMeta.OnnxValueType}'" +
$" but loading as tensor: {tensor.Name}");
}
var protoDt = (Tensors.TensorElementType)tensor.DataType;
var metaElementType = nodeMeta.ElementDataType;
if (!((protoDt == metaElementType) ||
(protoDt == TensorElementType.UInt16 &&
(metaElementType == TensorElementType.BFloat16 || metaElementType == TensorElementType.Float16))))
throw new InvalidDataException($"For node: '{nodeName}' metadata expects: '{metaElementType}' but loaded loaded tensor type: '{protoDt}'");
// Tensors within Sequences may have no dimensions as the standard allows
// different dimensions for each tensor element of the sequence
if (nodeMeta.Dimensions.Length > 0 && nodeMeta.Dimensions.Length != tensor.Dims.Count)
{
throw new InvalidDataException($"node: '{nodeName}' nodeMeta.Dim.Length: {nodeMeta.Dimensions.Length} " +
$"is expected to be equal to tensor.Dims.Count {tensor.Dims.Count}");
}
var shape = tensor.Dims.ToArray();
for (int i = 0; i < nodeMeta.Dimensions.Length; i++)
{
if ((nodeMeta.Dimensions[i] != -1) && (nodeMeta.Dimensions[i] != shape[i]))
throw new InvalidDataException($"Node: '{nodeName}' dimension at idx {i} is {nodeMeta.Dimensions}[{i}] " +
$"is expected to either be -1 or {shape[i]}");
}
// element type for Float16 and BFloat16 in the loaded tensor would always be uint16, so
// we want to use element type from metadata
if (protoDt == TensorElementType.String)
return CreateOrtValueFromStringTensor(tensor.StringData, shape);
return CreateOrtValueFromRawData(OrtAllocator.DefaultInstance, tensor.RawData.Span, metaElementType, shape);
}
internal static OrtValue CreateOrtValueFromSequence(Onnx.SequenceProto sequence, string nodeName, NodeMetadata nodeMeta)
{
var sequenceMeta = nodeMeta.AsSequenceMetadata();
var elemMeta = sequenceMeta.ElementMeta;
int seqNum = 0;
var seqElemType = (Onnx.SequenceProto.Types.DataType)sequence.ElemType;
switch (seqElemType)
{
case Onnx.SequenceProto.Types.DataType.Tensor:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_TENSOR);
using DisposableListTest<OrtValue> sequenceOfTensors = new(sequence.TensorValues.Count);
foreach (var tensor in sequence.TensorValues)
{
var element = LoadOrValueTensorPb(tensor, sequence.Name, elemMeta);
sequenceOfTensors.Add(element);
}
// Will take possession of ortValues in the sequence and will clear this container
return OrtValue.CreateSequence(sequenceOfTensors);
}
case Onnx.SequenceProto.Types.DataType.Sequence: // Sequence of sequences
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_SEQUENCE);
using DisposableListTest<OrtValue> seqOfSequences = new(sequence.TensorValues.Count);
foreach (var s in sequence.SequenceValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
var ortValue = CreateOrtValueFromSequence(s, elemName, elemMeta);
seqOfSequences.Add(ortValue);
}
return OrtValue.CreateSequence(seqOfSequences);
}
case Onnx.SequenceProto.Types.DataType.Map:
{
throw new NotImplementedException(
"Test data format for maps is under investigation");
}
case Onnx.SequenceProto.Types.DataType.Optional:
{
SequenceCheckMatchOnnxType(nodeName, sequenceMeta, OnnxValueType.ONNX_TYPE_OPTIONAL);
using DisposableListTest<OrtValue> seqOfSequences = new(sequence.TensorValues.Count);
foreach (var opt in sequence.OptionalValues)
{
var elemName = MakeSequenceElementName(nodeName, sequence.Name, seqNum++);
var ortValue = CreateOrtValueFromOptional(opt, elemName, elemMeta);
seqOfSequences.Add(ortValue);
}
return OrtValue.CreateSequence(seqOfSequences);
}
default:
throw new NotImplementedException($"Sequence test data loading does not support element type: " +
$"'{seqElemType}'");
}
}
internal static OrtValue CreateOrtValueFromOptional(Onnx.OptionalProto optional, string nodeName, NodeMetadata nodeMetadata)
{
var meta = nodeMetadata.AsOptionalMetadata().ElementMeta;
switch ((Onnx.OptionalProto.Types.DataType)optional.ElemType)
{
case Onnx.OptionalProto.Types.DataType.Tensor:
{
var tensor = optional.TensorValue;
return LoadOrValueTensorPb(tensor, nodeName, meta);
}
case Onnx.OptionalProto.Types.DataType.Sequence:
{
var sequence = optional.SequenceValue;
return CreateOrtValueFromSequence(sequence, nodeName, meta);
}
case Onnx.OptionalProto.Types.DataType.Map:
{
throw new NotImplementedException(
"Test data format for maps is under investigation");
}
case Onnx.OptionalProto.Types.DataType.Optional:
throw new NotImplementedException($"Unable to load '{nodeName}' optional contained within optional");
default:
// Test data contains OptionalProto with the contained element type undefined.
// the premise is, if the element is not fed as an input, we should not care
// what Onnx type it is. However, we do not need to support AFAIK such inputs
// since the value for them could never be supplied.
throw new NotImplementedException($"Unable to load '{nodeName}' optional element type of: {(Onnx.OptionalProto.Types.DataType)optional.ElemType} type");
}
}
internal static OrtValue CreateOrtValueFromRawData(OrtAllocator allocator, ReadOnlySpan<byte> rawData, TensorElementType elementType, long[] shape)
{
Debug.Assert(elementType != TensorElementType.String, "Does not support strings");
var typeInfo = TensorBase.GetElementTypeInfo(elementType);
Assert.NotNull(typeInfo);
// ArrayUtilities not accessible in all builds
var shapeSize = shape.Aggregate(1L, (a, v) => a * v);
var inferredSize = rawData.Length / typeInfo.TypeSize;
Assert.Equal(shapeSize, inferredSize);
Assert.Equal(0, rawData.Length % typeInfo.TypeSize);
var ortValue = OrtValue.CreateAllocatedTensorValue(allocator, elementType, shape);
try
{
// The endianess data in protobuf is little endian.
// We simply copy raw memory into the tensor raw data.
var span = ortValue.GetTensorMutableRawData();
Assert.Equal(rawData.Length, span.Length);
rawData.CopyTo(span);
return ortValue;
}
catch (Exception)
{
ortValue.Dispose();
throw;
}
}
internal static NamedOnnxValue CreateNamedOnnxValueFromStringTensor(IList<Google.Protobuf.ByteString> strings,
string nodeName, int[] dimensions)
{
string[] strArray = new string[strings.Count];
for (int i = 0; i < strings.Count; ++i)
{
#if NET6_0_OR_GREATER
strArray[i] = Encoding.UTF8.GetString(strings[i].Span);
#else
strArray[i] = Encoding.UTF8.GetString(strings[i].ToByteArray());
#endif
}
var dt = new DenseTensor<string>(strArray, dimensions);
return NamedOnnxValue.CreateFromTensor<string>(nodeName, dt);
}
internal static OrtValue CreateOrtValueFromStringTensor(IList<Google.Protobuf.ByteString> strings,
long[] shape)
{
var ortValue = OrtValue.CreateTensorWithEmptyStrings(OrtAllocator.DefaultInstance, shape);
try
{
for (int i = 0; i < strings.Count; ++i)
{
ortValue.FillStringTensorElement(strings[i].Span, i);
}
return ortValue;
}
catch (Exception)
{
ortValue.Dispose();
throw;
}
}
internal static float[] LoadTensorFromFile(string filename, bool skipheader = true)
{
var tensorData = new List<float>();
// read data from file
using (var inputFile = new System.IO.StreamReader(filename))
{
if (skipheader)
inputFile.ReadLine(); // skip the input name
string[] dataStr = inputFile.ReadLine().Split(new char[] { ',', '[', ']', ' ' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < dataStr.Length; i++)
{
tensorData.Add(Single.Parse(dataStr[i]));
}
}
return tensorData.ToArray();
}
}
}