| // |
| // Copyright © 2023 Arm Ltd and Contributors. All rights reserved. |
| // SPDX-License-Identifier: MIT |
| // |
| |
| #pragma once |
| |
| #include <OpaqueDelegateUtils.hpp> |
| |
| namespace armnnOpaqueDelegate |
| { |
| |
| TfLiteStatus VisitStridedSliceOperator(DelegateData& delegateData, |
| TfLiteOpaqueContext* tfLiteContext, |
| TfLiteOpaqueNode* tfLiteNode, |
| int nodeIndex, |
| int32_t tfLiteStridedSliceOperatorCode) |
| { |
| TF_LITE_ENSURE_STATUS(ValidateNumInputs(tfLiteContext, tfLiteNode, 4, nodeIndex)); |
| TF_LITE_ENSURE_STATUS(ValidateNumOutputs(tfLiteContext, tfLiteNode, 1, nodeIndex)); |
| |
| // Read inputs [input, begin, end, strides] |
| // Gather input indices and use to get input tensor. |
| const int* inputTensors; |
| int numInputs; |
| if (TfLiteOpaqueNodeInputs(tfLiteNode, &inputTensors, &numInputs) != kTfLiteOk) |
| { |
| TF_LITE_OPAQUE_MAYBE_KERNEL_LOG( |
| tfLiteContext, |
| "TfLiteArmnnOpaqueDelegate: Unable to gather input tensor indices from node #%d: ", |
| nodeIndex); |
| return kTfLiteError; |
| } |
| |
| std::vector<const TfLiteOpaqueTensor*> tfLiteInputTensors; |
| tfLiteInputTensors.reserve(numInputs); |
| for (int i = 0; i < numInputs; i++) |
| { |
| const TfLiteOpaqueTensor* inputTensor = TfLiteOpaqueContextGetOpaqueTensor(tfLiteContext, inputTensors[i]); |
| tfLiteInputTensors.push_back(inputTensor); |
| if (!IsValid(tfLiteContext, inputTensor, tfLiteStridedSliceOperatorCode, nodeIndex)) |
| { |
| return kTfLiteError; |
| } |
| } |
| |
| const armnn::TensorInfo& inputTensorInfo = GetTensorInfoForTfLiteOpaqueTensor(tfLiteInputTensors[0]); |
| |
| // We save the begin, end and strides tensors in our descriptor. Therefore we have to read those values from inputs |
| unsigned int inputRank = inputTensorInfo.GetNumDimensions(); |
| auto ReadInt32Input = [&](int inputIndex, std::vector<int32_t>& outputData) -> TfLiteStatus |
| { |
| if (TfLiteOpaqueTensorType(tfLiteInputTensors[inputIndex]) != kTfLiteInt32) |
| { |
| TF_LITE_OPAQUE_MAYBE_KERNEL_LOG( |
| tfLiteContext, |
| "TfLitearmnnOpaqueDelegate: The Begin-, End- and Stride-Tensors of the StridedSlice operation need" |
| " to be of type int32. Operator: #%d node #%d: ", |
| tfLiteStridedSliceOperatorCode, nodeIndex); |
| return kTfLiteError; |
| } |
| uint32_t rank = TfLiteOpaqueTensorNumDims(tfLiteInputTensors[inputIndex]); |
| if (rank != 1) |
| { |
| TF_LITE_OPAQUE_MAYBE_KERNEL_LOG( |
| tfLiteContext, |
| "TfLitearmnnOpaqueDelegate: The Begin-, End- and Stride-Tensors of the StridedSlice operation need" |
| " to be a 1D-Tensor. Operator: #%d node #%d: ", |
| tfLiteStridedSliceOperatorCode, nodeIndex); |
| return kTfLiteError; |
| } |
| uint32_t numValues = TfLiteOpaqueTensorDim(tfLiteInputTensors[inputIndex], 0); |
| if (numValues != inputRank) |
| { |
| TF_LITE_OPAQUE_MAYBE_KERNEL_LOG( |
| tfLiteContext, |
| "TfLitearmnnOpaqueDelegate: The number of values in the Begin-, End- and Stride-Tensors of the " |
| "StridedSlice operation need to be equal to the rank of the Input-Tensor. Operator: #%d node #%d: ", |
| tfLiteStridedSliceOperatorCode, nodeIndex); |
| return kTfLiteError; |
| } |
| // return tensor data |
| auto* tensorDataPtr = static_cast<uint32_t*>(TfLiteOpaqueTensorData(tfLiteInputTensors[inputIndex])); |
| outputData.assign(tensorDataPtr, tensorDataPtr + numValues); |
| return kTfLiteOk; |
| }; |
| |
| std::vector<int32_t> beginData; |
| if (ReadInt32Input(1, beginData) != kTfLiteOk) |
| return kTfLiteError; |
| std::vector<int32_t> endData; |
| if (ReadInt32Input(2, endData) != kTfLiteOk) |
| return kTfLiteError; |
| std::vector<int32_t> strideData; |
| if (ReadInt32Input(3, strideData) != kTfLiteOk) |
| return kTfLiteError; |
| |
| // parse built in options |
| auto* nodeParameters = reinterpret_cast<TfLiteStridedSliceParams*>(TfLiteOpaqueNodeGetBuiltinData(tfLiteNode)); |
| |
| // Write all data to the descriptor |
| armnn::StridedSliceDescriptor descriptor; |
| descriptor.m_Begin = std::move(beginData); |
| descriptor.m_End = std::move(endData); |
| descriptor.m_Stride = std::move(strideData); |
| descriptor.m_BeginMask = nodeParameters->begin_mask; |
| descriptor.m_EllipsisMask = nodeParameters->ellipsis_mask; |
| descriptor.m_EndMask = nodeParameters->end_mask; |
| descriptor.m_NewAxisMask = nodeParameters->new_axis_mask; |
| descriptor.m_ShrinkAxisMask = nodeParameters->shrink_axis_mask; |
| descriptor.m_DataLayout = armnn::DataLayout::NHWC; |
| |
| // Validate output |
| // Gather output indices and use to get output tensor. |
| const int* outputTensors; |
| int numOutputs; |
| if (TfLiteOpaqueNodeOutputs(tfLiteNode, &outputTensors, &numOutputs) != kTfLiteOk) |
| { |
| TF_LITE_OPAQUE_MAYBE_KERNEL_LOG( |
| tfLiteContext, |
| "TfLiteArmnnOpaqueDelegate: Unable to gather output tensor indices from node #%d: ", |
| nodeIndex); |
| return kTfLiteError; |
| } |
| |
| const TfLiteOpaqueTensor* tfLiteOutputTensor = TfLiteOpaqueContextGetOpaqueTensor(tfLiteContext, outputTensors[0]); |
| if (!IsValid(tfLiteContext, tfLiteOutputTensor, tfLiteStridedSliceOperatorCode, nodeIndex)) |
| { |
| return kTfLiteError; |
| } |
| |
| const armnn::TensorInfo& outputTensorInfo = GetTensorInfoForTfLiteOpaqueTensor(tfLiteOutputTensor); |
| |
| bool isSupported = false; |
| armnn::BackendId setBackend; |
| auto validateFunc = [&](const armnn::TensorInfo& outInfo, bool& isSupported) |
| { |
| FORWARD_LAYER_OPAQUE_SUPPORT_FUNC("STRIDED_SLICE", |
| tfLiteContext, |
| IsStridedSliceSupported, |
| delegateData.m_Backends, |
| isSupported, |
| setBackend, |
| inputTensorInfo, |
| outInfo, |
| descriptor); |
| }; |
| |
| if (!delegateData.m_Network) |
| { |
| validateFunc(outputTensorInfo, isSupported); |
| return isSupported ? kTfLiteOk : kTfLiteError; |
| } |
| |
| // Add a StridedSlice layer |
| auto layerName = GetName(armnn::LayerType::StridedSlice, nodeIndex); |
| armnn::IConnectableLayer* layer = delegateData.m_Network->AddStridedSliceLayer(descriptor, layerName.c_str()); |
| layer->SetBackendId(setBackend); |
| ARMNN_ASSERT(layer != nullptr); |
| |
| armnn::IOutputSlot& outputSlot = layer->GetOutputSlot(0); |
| outputSlot.SetTensorInfo(outputTensorInfo); |
| |
| // try to connect the Constant Inputs if there are any |
| if (ProcessInputs(layer, delegateData, tfLiteContext, tfLiteNode, nodeIndex) != kTfLiteOk) |
| { |
| return kTfLiteError; |
| } |
| |
| // Connect |
| return Connect(layer, tfLiteContext, tfLiteNode, delegateData); |
| } |
| |
| } // namespace armnnOpaqueDelegate |
| |