HDR layer info listener
Bug: 182312559
Test: SilkFX's layer listener
Change-Id: Iaaf5065f1adc871ce2890840e19756293dd21871
diff --git a/services/surfaceflinger/HdrLayerInfoReporter.h b/services/surfaceflinger/HdrLayerInfoReporter.h
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+++ b/services/surfaceflinger/HdrLayerInfoReporter.h
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+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <android-base/thread_annotations.h>
+#include <android/gui/IHdrLayerInfoListener.h>
+#include <binder/IBinder.h>
+
+#include <unordered_map>
+
+namespace android {
+
+class HdrLayerInfoReporter final : public IBinder::DeathRecipient {
+public:
+ struct HdrLayerInfo {
+ int32_t numberOfHdrLayers = 0;
+ int32_t maxW = 0;
+ int32_t maxH = 0;
+ int32_t flags = 0;
+
+ bool operator==(const HdrLayerInfo& other) const {
+ return numberOfHdrLayers == other.numberOfHdrLayers && maxW == other.maxW &&
+ maxH == other.maxH && flags == other.flags;
+ }
+
+ bool operator!=(const HdrLayerInfo& other) const { return !(*this == other); }
+ };
+
+ HdrLayerInfoReporter() = default;
+ ~HdrLayerInfoReporter() final = default;
+
+ // Dispatches updated layer fps values for the registered listeners
+ // This method promotes Layer weak pointers and performs layer stack traversals, so mStateLock
+ // must be held when calling this method.
+ void dispatchHdrLayerInfo(const HdrLayerInfo& info) EXCLUDES(mMutex);
+
+ // Override for IBinder::DeathRecipient
+ void binderDied(const wp<IBinder>&) override EXCLUDES(mMutex);
+
+ // Registers an Fps listener that listens to fps updates for the provided layer
+ void addListener(const sp<gui::IHdrLayerInfoListener>& listener) EXCLUDES(mMutex);
+ // Deregisters an Fps listener
+ void removeListener(const sp<gui::IHdrLayerInfoListener>& listener) EXCLUDES(mMutex);
+
+ bool hasListeners() const EXCLUDES(mMutex) {
+ std::scoped_lock lock(mMutex);
+ return !mListeners.empty();
+ }
+
+private:
+ mutable std::mutex mMutex;
+ struct WpHash {
+ size_t operator()(const wp<IBinder>& p) const {
+ return std::hash<IBinder*>()(p.unsafe_get());
+ }
+ };
+
+ struct TrackedListener {
+ sp<gui::IHdrLayerInfoListener> listener;
+ HdrLayerInfo lastInfo;
+ };
+
+ std::unordered_map<wp<IBinder>, TrackedListener, WpHash> mListeners GUARDED_BY(mMutex);
+};
+
+} // namespace android
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