wehub-resource-sync
99 lines
4.2 KiB
C++
99 lines
4.2 KiB
C++
/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include "tensorflow/lite/c/common_internal.h"
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#include <cstdint>
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#include "tensorflow/lite/core/c/c_api_types.h"
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#include "tensorflow/lite/core/c/common.h"
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bool TfLiteDelegateIsOpaque(const TfLiteDelegate* delegate) {
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return delegate != nullptr && delegate->Prepare == nullptr &&
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delegate->CopyFromBufferHandle == nullptr &&
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delegate->FreeBufferHandle == nullptr &&
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delegate->opaque_delegate_builder != nullptr;
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}
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TfLiteStatus TfLiteDelegatePrepareInternal(TfLiteContext* context,
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TfLiteDelegate* delegate) {
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TfLiteStatus status = kTfLiteOk;
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// The following casts are safe only because this code is part of the
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// TF Lite runtime implementation. Apps using TF Lite should not rely on
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// TfLiteOpaqueContext and TfLiteContext being equivalent, or on
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// TfLiteOpaqueDelegate and TfLiteDelegate being equivalent.
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if (TfLiteDelegateIsOpaque(delegate) &&
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delegate->opaque_delegate_builder->Prepare) {
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status = delegate->opaque_delegate_builder->Prepare(
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reinterpret_cast<TfLiteOpaqueContext*>(context),
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reinterpret_cast<TfLiteOpaqueDelegate*>(delegate),
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delegate->opaque_delegate_builder->data);
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} else {
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status = delegate->Prepare(context, delegate);
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}
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return status;
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}
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TfLiteStatus TfLiteDelegateCopyFromBufferHandleInternal(
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TfLiteContext* context, TfLiteDelegate* delegate,
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TfLiteBufferHandle buffer_handle, TfLiteTensor* tensor) {
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// The following casts are safe only because this code is part of the
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// TF Lite runtime implementation. Apps using TF Lite should not rely on
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// TfLiteOpaqueContext and TfLiteContext being equivalent, or on
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// TfLiteOpaqueDelegate and TfLiteDelegate being equivalent.
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if (TfLiteDelegateIsOpaque(delegate) &&
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delegate->opaque_delegate_builder->CopyFromBufferHandle) {
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return delegate->opaque_delegate_builder->CopyFromBufferHandle(
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reinterpret_cast<TfLiteOpaqueContext*>(context),
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reinterpret_cast<TfLiteOpaqueDelegate*>(delegate),
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delegate->opaque_delegate_builder->data, tensor->buffer_handle,
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reinterpret_cast<TfLiteOpaqueTensor*>(tensor));
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} else {
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TF_LITE_ENSURE(context, delegate->CopyFromBufferHandle != nullptr);
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return delegate->CopyFromBufferHandle(context, delegate,
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tensor->buffer_handle, tensor);
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}
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}
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TfLiteStatus TfLiteDelegateFreeBufferHandleInternal(
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TfLiteContext* context, TfLiteDelegate* delegate,
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TfLiteBufferHandle* buffer_handle) {
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// The following casts are safe only because this code is part of the
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// TF Lite runtime implementation. Apps using TF Lite should not rely on
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// TfLiteOpaqueContext and TfLiteContext being equivalent, or on
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// TfLiteOpaqueDelegate and TfLiteDelegate being equivalent.
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if (TfLiteDelegateIsOpaque(delegate) &&
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delegate->opaque_delegate_builder->FreeBufferHandle) {
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delegate->opaque_delegate_builder->FreeBufferHandle(
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reinterpret_cast<TfLiteOpaqueContext*>(context),
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reinterpret_cast<TfLiteOpaqueDelegate*>(delegate),
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delegate->opaque_delegate_builder->data, buffer_handle);
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return kTfLiteOk;
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} else if (delegate->FreeBufferHandle != nullptr) {
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delegate->FreeBufferHandle(context, delegate, buffer_handle);
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return kTfLiteOk;
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}
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// We failed to free the buffer handle.
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return kTfLiteError;
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}
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int64_t TfLiteDelegateGetFlagsInternal(TfLiteDelegate* delegate) {
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if (TfLiteDelegateIsOpaque(delegate)) {
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return delegate->opaque_delegate_builder->flags;
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}
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return delegate->flags;
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}
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