IVGCVSW-5571 Expose the TfLite Delegate to the TfLite python API

 * Implemented external delegate adaptor interface for TfLite
 * Activated armnn logging for delegate
 * Added logging info to indicate if gpu tuning is turned on
 * Added pytests to ensure functionality of the external delegate adaptor
 * Included the delegate directory into doxygen
 * Added documentation on how to use the external delegate in python

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Signed-off-by: Jan Eilers <jan.eilers@arm.com>
Change-Id: Id3b4588fb0b9ac7e3f47ba2c19feead7beb58e18

1 files changed, 22 insertions, 2 deletions

diff --git a/delegate/include/DelegateOptions.hpp b/delegate/include/DelegateOptions.hpp
index daf20150be..6058061b3d 100644
--- a/delegate/include/DelegateOptions.hpp
+++ b/delegate/include/DelegateOptions.hpp
@@ -6,6 +6,8 @@
 #pragma once
 
 #include <armnn/ArmNN.hpp>
+#include <armnn/Logging.hpp>
+#include <armnn/Optional.hpp>
 
 #include <set>
 #include <string>
@@ -17,10 +19,13 @@ namespace armnnDelegate
 class DelegateOptions
 {
 public:
-    DelegateOptions(armnn::Compute computeDevice, const std::vector<armnn::BackendOptions>& backendOptions = {});
+    DelegateOptions(armnn::Compute computeDevice,
+                    const std::vector<armnn::BackendOptions>& backendOptions = {},
+                    armnn::Optional<armnn::LogSeverity> logSeverityLevel = armnn::EmptyOptional());
 
     DelegateOptions(const std::vector<armnn::BackendId>& backends,
-                    const std::vector<armnn::BackendOptions>& backendOptions = {});
+                    const std::vector<armnn::BackendOptions>& backendOptions = {},
+                    armnn::Optional<armnn::LogSeverity> logSeverityLevel = armnn::EmptyOptional());
 
     const std::vector<armnn::BackendId>& GetBackends() const { return m_Backends; }
 
@@ -28,6 +33,18 @@ public:
 
     const std::vector<armnn::BackendOptions>& GetBackendOptions() const { return m_BackendOptions; }
 
+    /// Appends a backend option to the list of backend options
+    void AddBackendOption(const armnn::BackendOptions& option) { m_BackendOptions.push_back(option); }
+
+    /// Sets the severity level for logging within ArmNN that will be used on creation of the delegate
+    void SetLoggingSeverity(const armnn::LogSeverity& level) { m_LoggingSeverity = level; }
+    void SetLoggingSeverity(const std::string& level) { m_LoggingSeverity = armnn::StringToLogLevel(level); }
+
+    /// Returns the severity level for logging within ArmNN
+    armnn::LogSeverity GetLoggingSeverity() { return m_LoggingSeverity.value(); }
+
+    bool IsLoggingEnabled() { return m_LoggingSeverity.has_value(); }
+
 private:
     /// Which backend to run Delegate on.
     /// Examples of possible values are: CpuRef, CpuAcc, GpuAcc.
@@ -52,6 +69,9 @@ private:
     ///   "TuningFile" : string [filenameString]
     ///   "KernelProfilingEnabled" : bool [true | false]
     std::vector<armnn::BackendOptions> m_BackendOptions;
+
+    /// Severity level for logging within ArmNN that will be used on creation of the delegate
+    armnn::Optional<armnn::LogSeverity> m_LoggingSeverity;
 };
 
 } // namespace armnnDelegate