From f37b970ff96b98310309e78aeea8a2e9df27b15a Mon Sep 17 00:00:00 2001
From: Finn Williams <Finn.Williams@arm.com>
Date: Wed, 1 Sep 2021 18:06:04 +0100
Subject: IVGCVSW-6312 Support pre-importing inputs

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: Ifc5e6f2e36767cb2a5cbf281d40ec9989b581abc
---
 src/armnn/WorkingMemHandle.cpp | 52 ++++++++++++++++++++++++++++++++++--------
 1 file changed, 42 insertions(+), 10 deletions(-)

(limited to 'src/armnn/WorkingMemHandle.cpp')

diff --git a/src/armnn/WorkingMemHandle.cpp b/src/armnn/WorkingMemHandle.cpp
index 1dcaa3853a..e402684bb8 100644
--- a/src/armnn/WorkingMemHandle.cpp
+++ b/src/armnn/WorkingMemHandle.cpp
@@ -14,20 +14,52 @@ namespace armnn
 namespace experimental
 {
 
-WorkingMemHandle::WorkingMemHandle(
-        NetworkId networkId,
+WorkingMemHandle::WorkingMemHandle(NetworkId networkId,
+        std::vector<std::pair<LayerBindingId, LayerGuid>> inputHandles,
+        std::vector<InputConnectionInfo> inputConnections,
         std::vector<WorkingMemDescriptor> workingMemDescriptors,
         std::unordered_map<LayerGuid, WorkingMemDescriptor> workingMemDescriptorMap,
         std::vector<std::shared_ptr<IMemoryManager>> memoryManagers,
-        std::unordered_map<LayerGuid, std::vector<std::unique_ptr<ITensorHandle> > > ownedTensorHandles) :
-    m_NetworkId(networkId),
-    m_WorkingMemDescriptors(workingMemDescriptors),
-    m_WorkingMemDescriptorMap(workingMemDescriptorMap),
-    m_MemoryManagers(memoryManagers),
-    m_OwnedTensorHandles(std::move(ownedTensorHandles)),
-    m_IsAllocated(false),
-    m_Mutex()
+        std::unordered_map<LayerGuid, std::vector<std::unique_ptr<ITensorHandle> > > ownedTensorHandles)
+    : m_NetworkId(networkId)
+    , m_WorkingMemDescriptors(workingMemDescriptors)
+    , m_WorkingMemDescriptorMap(workingMemDescriptorMap)
+    , m_MemoryManagers(memoryManagers)
+    , m_OwnedTensorHandles(std::move(ownedTensorHandles))
+    , m_IsAllocated(false)
+    , m_Mutex()
 {
+    unsigned int maxInputBindingId = 0;
+    for (auto pair : inputHandles)
+    {
+        unsigned int bindingId = numeric_cast<unsigned int>(pair.first);
+        if (maxInputBindingId < bindingId)
+        {
+            maxInputBindingId = bindingId;
+        }
+
+    }
+
+    // Create a map of LayerBindingIds to the corresponding input ITensorHandle*
+    for (auto pair : inputHandles)
+    {
+        m_InputHandleMap[pair.first] = m_WorkingMemDescriptorMap.at(pair.second).m_Outputs[0];
+        m_ValidationMap[pair.first] = false;
+    }
+
+    // For every input we need to store all locations from which that input's ITensorHandle* is read.
+    // So we can, at a later point, swap in and out the ITensorHandle* at that location.
+    for (auto inputConnectionInfo : inputConnections)
+    {
+        WorkingMemDescriptor& workingMemDescriptor = m_WorkingMemDescriptors[inputConnectionInfo.m_DescriptorIndex];
+
+        auto pos = workingMemDescriptor.m_Inputs.begin();
+        // The difference_type of a vector can be unsigned int or signed int depending on the std implementation
+        // This cast removes any conversion warnings
+        pos += numeric_cast<std::vector<ITensorHandle*>::difference_type>(inputConnectionInfo.m_InputIndex);
+
+        m_InputConnectionMap[inputConnectionInfo.m_LayerBindingId].push_back(pos);
+    }
 }
 
 void WorkingMemHandle::Allocate()
-- 
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