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//
// Copyright © 2023 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#pragma once
#include <DelegateOptions.hpp>
#include <Version.hpp>
#include <tensorflow/core/public/version.h>
#include <tensorflow/lite/c/c_api_opaque.h>
#include <tensorflow/lite/core/experimental/acceleration/configuration/c/stable_delegate.h>
#include <tensorflow/lite/experimental/acceleration/configuration/delegate_registry.h>
#if TF_MAJOR_VERSION > 2 || (TF_MAJOR_VERSION == 2 && TF_MINOR_VERSION > 5)
#define ARMNN_POST_TFLITE_2_5
#endif
namespace armnnOpaqueDelegate
{
struct DelegateData
{
DelegateData(const std::vector<armnn::BackendId>& backends)
: m_Backends(backends)
, m_Network(nullptr, nullptr)
{}
const std::vector<armnn::BackendId> m_Backends;
armnn::INetworkPtr m_Network;
std::vector<armnn::IOutputSlot*> m_OutputSlotForNode;
};
/// Forward declaration for functions initializing the ArmNN Delegate
::armnnDelegate::DelegateOptions TfLiteArmnnDelegateOptionsDefault();
TfLiteOpaqueDelegate* TfLiteArmnnOpaqueDelegateCreate(const void* settings);
void TfLiteArmnnOpaqueDelegateDelete(TfLiteOpaqueDelegate* tfLiteDelegate);
TfLiteStatus DoPrepare(TfLiteOpaqueContext* context, TfLiteOpaqueDelegate* delegate, void* data);
/// ArmNN Opaque Delegate
class ArmnnOpaqueDelegate
{
friend class ArmnnSubgraph;
public:
explicit ArmnnOpaqueDelegate(armnnDelegate::DelegateOptions options);
TfLiteIntArray* IdentifyOperatorsToDelegate(TfLiteOpaqueContext* context);
TfLiteOpaqueDelegateBuilder* GetDelegateBuilder() { return &m_Builder; }
/// Retrieve version in X.Y.Z form
static const std::string GetVersion();
private:
/**
* Returns a pointer to the armnn::IRuntime* this will be shared by all armnn_delegates.
*/
armnn::IRuntime* GetRuntime(const armnn::IRuntime::CreationOptions& options)
{
static armnn::IRuntimePtr instance = armnn::IRuntime::Create(options);
/// Instantiated on first use.
return instance.get();
}
TfLiteOpaqueDelegateBuilder m_Builder =
{
reinterpret_cast<void*>(this), // .data_
DoPrepare, // .Prepare
nullptr, // .CopyFromBufferHandle
nullptr, // .CopyToBufferHandle
nullptr, // .FreeBufferHandle
kTfLiteDelegateFlagsNone, // .flags
};
/// ArmNN Runtime pointer
armnn::IRuntime* m_Runtime;
/// ArmNN Delegate Options
armnnDelegate::DelegateOptions m_Options;
};
static int TfLiteArmnnOpaqueDelegateErrno(TfLiteOpaqueDelegate* delegate) { return 0; }
/// In order for the delegate to be loaded by TfLite
const TfLiteOpaqueDelegatePlugin* GetArmnnDelegatePluginApi();
using tflite::delegates::DelegatePluginInterface;
using TfLiteOpaqueDelegatePtr = tflite::delegates::TfLiteDelegatePtr;
class ArmnnDelegatePlugin : public DelegatePluginInterface
{
public:
static std::unique_ptr<ArmnnDelegatePlugin> New(const tflite::TFLiteSettings& tflite_settings)
{
return std::make_unique<ArmnnDelegatePlugin>(tflite_settings);
}
tflite::delegates::TfLiteDelegatePtr Create() override
{
// Use default settings until options have been enabled.
return tflite::delegates::TfLiteDelegatePtr(
TfLiteArmnnOpaqueDelegateCreate(nullptr), TfLiteArmnnOpaqueDelegateDelete);
}
int GetDelegateErrno(TfLiteOpaqueDelegate* from_delegate) override
{
return 0;
}
explicit ArmnnDelegatePlugin(const tflite::TFLiteSettings& tfliteSettings)
{
// Use default settings until options have been enabled.
}
};
/// ArmnnSubgraph class where parsing the nodes to ArmNN format and creating the ArmNN Graph
class ArmnnSubgraph
{
public:
static ArmnnSubgraph* Create(TfLiteOpaqueContext* tfLiteContext,
const TfLiteOpaqueDelegateParams* parameters,
const ArmnnOpaqueDelegate* delegate);
TfLiteStatus Prepare(TfLiteOpaqueContext* tfLiteContext);
TfLiteStatus Invoke(TfLiteOpaqueContext* tfLiteContext, TfLiteOpaqueNode* tfLiteNode);
static TfLiteStatus VisitNode(DelegateData& delegateData,
TfLiteOpaqueContext* tfLiteContext,
TfLiteRegistrationExternal* tfLiteRegistration,
TfLiteOpaqueNode* tfLiteNode,
int nodeIndex);
private:
ArmnnSubgraph(armnn::NetworkId networkId,
armnn::IRuntime* runtime,
std::vector<armnn::BindingPointInfo>& inputBindings,
std::vector<armnn::BindingPointInfo>& outputBindings)
: m_NetworkId(networkId)
, m_Runtime(runtime)
, m_InputBindings(inputBindings)
, m_OutputBindings(outputBindings)
{}
static TfLiteStatus AddInputLayer(DelegateData& delegateData,
TfLiteOpaqueContext* tfLiteContext,
const TfLiteIntArray* inputs,
std::vector<armnn::BindingPointInfo>& inputBindings);
static TfLiteStatus AddOutputLayer(DelegateData& delegateData,
TfLiteOpaqueContext* tfLiteContext,
const TfLiteIntArray* outputs,
std::vector<armnn::BindingPointInfo>& outputBindings);
/// The Network Id
armnn::NetworkId m_NetworkId;
/// ArmNN Runtime
armnn::IRuntime* m_Runtime;
/// Binding information for inputs and outputs
std::vector<armnn::BindingPointInfo> m_InputBindings;
std::vector<armnn::BindingPointInfo> m_OutputBindings;
};
} // armnnOpaqueDelegate namespace
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