1 /* 2 * Copyright 2020 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include "fcp/tensorflow/tensor_crc32.h" 17 #include "tensorflow/core/framework/op.h" 18 #include "tensorflow/core/framework/op_kernel.h" 19 #include "tensorflow/core/framework/shape_inference.h" 20 #include "tensorflow/core/framework/tensor.h" 21 #include "tensorflow/core/framework/types.h" 22 #include "tensorflow/core/lib/core/errors.h" 23 #include "tensorflow/core/lib/hash/crc32c.h" 24 25 namespace fcp { 26 namespace tensorflow { 27 namespace checksums { 28 29 using ::tensorflow::DEVICE_CPU; 30 using ::tensorflow::OpKernel; 31 using ::tensorflow::OpKernelConstruction; 32 using ::tensorflow::OpKernelContext; 33 using ::tensorflow::StringPiece; 34 using ::tensorflow::Tensor; 35 using ::tensorflow::shape_inference::InferenceContext; 36 37 REGISTER_OP("CRC32") 38 .Input("input: T") 39 .Attr("T: type") 40 .Output("checksum: uint32") __anon1731f43d0102(InferenceContext* c) 41 .SetShapeFn([](InferenceContext* c) { 42 c->set_output(0, c->Scalar()); 43 return ::tensorflow::OkStatus(); 44 }); 45 46 class CRC32Op : public OpKernel { 47 public: CRC32Op(OpKernelConstruction * context)48 explicit CRC32Op(OpKernelConstruction* context) : OpKernel(context) {} 49 Compute(OpKernelContext * context)50 void Compute(OpKernelContext* context) override { 51 // Create an output tensor 52 Tensor* output_tensor = nullptr; 53 OP_REQUIRES_OK(context, context->allocate_output(0, {}, &output_tensor)); 54 55 // Store CRC32 of input tensor in output. 56 output_tensor->scalar<uint32_t>()() = TensorToCRC32(context->input(0)); 57 } 58 }; 59 60 REGISTER_KERNEL_BUILDER(Name("CRC32").Device(DEVICE_CPU), CRC32Op); 61 } // namespace checksums 62 } // namespace tensorflow 63 } // namespace fcp 64