IVGCVSW-3014 Check supported backends from runtime divice spec

!armnn:1070

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: If0f411f2232e856ebc4f1a4c10fa626e3277a6ab

1 files changed, 25 insertions, 0 deletions

diff --git a/ArmnnDevice.cpp b/ArmnnDevice.cpp
index 216b010c..c96798a8 100644
--- a/ArmnnDevice.cpp
+++ b/ArmnnDevice.cpp
@@ -81,6 +81,31 @@ ArmnnDevice::ArmnnDevice(DriverOptions options)
         ALOGE("ArmnnDevice: Failed to setup CL runtime: %s. Device will be unavailable.", error.what());
     }
 #endif
+    std::vector<armnn::BackendId> backends;
+
+    if (m_Runtime)
+    {
+        const armnn::BackendIdSet supportedDevices = m_Runtime->GetDeviceSpec().GetSupportedBackends();
+        for (auto &backend : m_Options.GetBackends())
+        {
+            if (std::find(supportedDevices.cbegin(), supportedDevices.cend(), backend) == supportedDevices.cend())
+            {
+                ALOGW("Requested unknown backend %s", backend.Get().c_str());
+            }
+            else
+            {
+                backends.push_back(backend);
+            }
+        }
+    }
+
+    if (backends.empty())
+    {
+        backends.emplace_back("GpuAcc");
+        ALOGW("No known backend specified. Defaulting to: GpuAcc");
+    }
+
+    m_Options.SetBackends(backends);
     ALOGV("ArmnnDevice: Created device with the following backends: %s",
           GetBackendString(m_Options).c_str());
 }