add attribute change callback hook for speaker endpoint

examples/tv-app/linux/BUILD.gn

@@ -43,6 +43,7 @@ executable("chip-tv-app") {
     "AppImpl.cpp",
     "AppImpl.h",
     "AppPlatformShellCommands.cpp",
+    "ZclCallbacks.cpp",
     "include/account-login/AccountLoginManager.cpp",
     "include/account-login/AccountLoginManager.h",
     "include/application-basic/ApplicationBasicManager.cpp",

examples/tv-app/linux/ZclCallbacks.cpp

@@ -0,0 +1,70 @@
+/*
+ *
+ *    Copyright (c) 2020 Project CHIP Authors
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+/**
+ * @file
+ *   This file implements the handler for data model messages.
+ */
+
+#include <app-common/zap-generated/ids/Attributes.h>
+#include <app-common/zap-generated/ids/Clusters.h>
+#include <app/ConcreteAttributePath.h>
+#include <lib/support/logging/CHIPLogging.h>
+
+using namespace ::chip;
+using namespace ::chip::app::Clusters;
+
+void MatterPostAttributeChangeCallback(const chip::app::ConcreteAttributePath & attributePath, uint8_t mask, uint8_t type,
+                                       uint16_t size, uint8_t * value)
+{
+    ClusterId clusterId     = attributePath.mClusterId;
+    AttributeId attributeId = attributePath.mAttributeId;
+    ChipLogProgress(Zcl, "Cluster callback: " ChipLogFormatMEI, ChipLogValueMEI(clusterId));
+
+    if (clusterId == OnOff::Id && attributeId == OnOff::Attributes::OnOff::Id)
+    {
+        ChipLogProgress(Zcl, "OnOff attribute ID: " ChipLogFormatMEI " Type: %u Value: %u, length %" PRIu16,
+                        ChipLogValueMEI(attributeId), type, *value, size);
+    }
+    else if (clusterId == LevelControl::Id)
+    {
+        ChipLogProgress(Zcl, "Level Control attribute ID: " ChipLogFormatMEI " Type: %u Value: %u, length %" PRIu16,
+                        ChipLogValueMEI(attributeId), type, *value, size);
+
+        // WIP Apply attribute change to Light
+    }
+}
+
+/** @brief OnOff Cluster Init
+ *
+ * This function is called when a specific cluster is initialized. It gives the
+ * application an opportunity to take care of cluster initialization procedures.
+ * It is called exactly once for each endpoint where cluster is present.
+ *
+ * @param endpoint   Ver.: always
+ *
+ * TODO Issue #3841
+ * emberAfOnOffClusterInitCallback happens before the stack initialize the cluster
+ * attributes to the default value.
+ * The logic here expects something similar to the deprecated Plugins callback
+ * emberAfPluginOnOffClusterServerPostInitCallback.
+ *
+ */
+void emberAfOnOffClusterInitCallback(EndpointId endpoint)
+{
+    // TODO: implement any additional Cluster Server init actions
+}