HDR layer info listener
Bug: 182312559
Test: SilkFX's layer listener
Change-Id: Iaaf5065f1adc871ce2890840e19756293dd21871
diff --git a/services/surfaceflinger/HdrLayerInfoReporter.cpp b/services/surfaceflinger/HdrLayerInfoReporter.cpp
new file mode 100644
index 0000000..c06e300
--- /dev/null
+++ b/services/surfaceflinger/HdrLayerInfoReporter.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "HdrLayerInfoReporter"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+
+#include <utils/Trace.h>
+
+#include "HdrLayerInfoReporter.h"
+
+namespace android {
+
+void HdrLayerInfoReporter::dispatchHdrLayerInfo(const HdrLayerInfo& info) {
+ ATRACE_CALL();
+ std::vector<sp<gui::IHdrLayerInfoListener>> toInvoke;
+ {
+ std::scoped_lock lock(mMutex);
+ toInvoke.reserve(mListeners.size());
+ for (auto& [key, it] : mListeners) {
+ if (it.lastInfo != info) {
+ it.lastInfo = info;
+ toInvoke.push_back(it.listener);
+ }
+ }
+ }
+
+ for (const auto& listener : toInvoke) {
+ ATRACE_NAME("invoking onHdrLayerInfoChanged");
+ listener->onHdrLayerInfoChanged(info.numberOfHdrLayers, info.maxW, info.maxH, info.flags);
+ }
+}
+
+void HdrLayerInfoReporter::binderDied(const wp<IBinder>& who) {
+ std::scoped_lock lock(mMutex);
+ mListeners.erase(who);
+}
+
+void HdrLayerInfoReporter::addListener(const sp<gui::IHdrLayerInfoListener>& listener) {
+ sp<IBinder> asBinder = IInterface::asBinder(listener);
+ asBinder->linkToDeath(this);
+ std::lock_guard lock(mMutex);
+ mListeners.emplace(wp<IBinder>(asBinder), TrackedListener{listener, HdrLayerInfo{}});
+}
+
+void HdrLayerInfoReporter::removeListener(const sp<gui::IHdrLayerInfoListener>& listener) {
+ std::lock_guard lock(mMutex);
+ mListeners.erase(wp<IBinder>(IInterface::asBinder(listener)));
+}
+
+} // namespace android
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