93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*
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* Copyright 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/thread_annotations.h>
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#include <android/gui/IHdrLayerInfoListener.h>
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#include <binder/IBinder.h>
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#include <unordered_map>
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#include "WpHash.h"
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namespace android {
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class HdrLayerInfoReporter final : public IBinder::DeathRecipient {
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public:
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struct HdrLayerInfo {
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int32_t numberOfHdrLayers = 0;
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int32_t maxW = 0;
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int32_t maxH = 0;
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int32_t flags = 0;
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// Counter-intuitively a value of "1" means "as much as you can give me" due to "1" being
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// the default value for all layers, so any HDR layer with a value of 1.f means no
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// reduced maximum has been requested
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// TODO: Should the max desired ratio have a better meaning for HLG/PQ so this can be
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// eliminated? If we assume an SDR white point of even just 100 nits for those content
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// then HLG could have a meaningful max ratio of 10.f and PQ of 100.f instead of needing
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// to treat 1.f as "uncapped"
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// With peak display brightnesses exceeding 1,000 nits currently, HLG's request could
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// actually be satisfied in some ambient conditions such that limiting that max for that
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// content in theory makes sense
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float maxDesiredHdrSdrRatio = 0.f;
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bool operator==(const HdrLayerInfo& other) const {
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return numberOfHdrLayers == other.numberOfHdrLayers && maxW == other.maxW &&
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maxH == other.maxH && flags == other.flags &&
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maxDesiredHdrSdrRatio == other.maxDesiredHdrSdrRatio;
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}
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bool operator!=(const HdrLayerInfo& other) const { return !(*this == other); }
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void mergeDesiredRatio(float update) {
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maxDesiredHdrSdrRatio = std::max(maxDesiredHdrSdrRatio, update);
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}
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};
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HdrLayerInfoReporter() = default;
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~HdrLayerInfoReporter() final = default;
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// Dispatches updated layer fps values for the registered listeners
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// This method promotes Layer weak pointers and performs layer stack traversals, so mStateLock
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// must be held when calling this method.
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void dispatchHdrLayerInfo(const HdrLayerInfo& info) EXCLUDES(mMutex);
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// Override for IBinder::DeathRecipient
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void binderDied(const wp<IBinder>&) override EXCLUDES(mMutex);
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// Registers an Fps listener that listens to fps updates for the provided layer
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void addListener(const sp<gui::IHdrLayerInfoListener>& listener) EXCLUDES(mMutex);
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// Deregisters an Fps listener
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void removeListener(const sp<gui::IHdrLayerInfoListener>& listener) EXCLUDES(mMutex);
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bool hasListeners() const EXCLUDES(mMutex) {
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std::scoped_lock lock(mMutex);
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return !mListeners.empty();
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}
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private:
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mutable std::mutex mMutex;
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struct TrackedListener {
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sp<gui::IHdrLayerInfoListener> listener;
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HdrLayerInfo lastInfo;
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};
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std::unordered_map<wp<IBinder>, TrackedListener, WpHash> mListeners GUARDED_BY(mMutex);
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};
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} // namespace android
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