294 lines
11 KiB
C++
294 lines
11 KiB
C++
/*
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* Copyright (C) 2015 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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#ifndef _ACAMERA_MANAGER_H
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#define _ACAMERA_MANAGER_H
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#include <camera/NdkCameraManager.h>
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#include <android-base/parseint.h>
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#include <android/hardware/ICameraService.h>
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#include <android/hardware/BnCameraServiceListener.h>
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#include <camera/CameraMetadata.h>
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#include <binder/IServiceManager.h>
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#include <utils/StrongPointer.h>
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#include <utils/Mutex.h>
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#include <media/stagefright/foundation/ALooper.h>
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#include <media/stagefright/foundation/AHandler.h>
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#include <media/stagefright/foundation/AMessage.h>
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#include <set>
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#include <map>
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namespace android {
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namespace acam {
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/**
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* Per-process singleton instance of CameraManger. Shared by all ACameraManager
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* instances. Created when first ACameraManager is created and destroyed when
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* all ACameraManager instances are deleted.
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*
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* TODO: maybe CameraManagerGlobal is better suited in libcameraclient?
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*/
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class CameraManagerGlobal final : public RefBase {
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public:
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static CameraManagerGlobal& getInstance();
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sp<hardware::ICameraService> getCameraService();
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void registerAvailabilityCallback(
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const ACameraManager_AvailabilityCallbacks *callback);
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void unregisterAvailabilityCallback(
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const ACameraManager_AvailabilityCallbacks *callback);
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void registerExtendedAvailabilityCallback(
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const ACameraManager_ExtendedAvailabilityCallbacks* callback);
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void unregisterExtendedAvailabilityCallback(
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const ACameraManager_ExtendedAvailabilityCallbacks* callback);
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/**
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* Return camera IDs that support camera2
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*/
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void getCameraIdList(std::vector<String8> *cameraIds);
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private:
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sp<hardware::ICameraService> mCameraService;
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const int kCameraServicePollDelay = 500000; // 0.5s
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const char* kCameraServiceName = "media.camera";
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Mutex mLock;
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template<class T>
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void registerAvailCallback(const T *callback);
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class DeathNotifier : public IBinder::DeathRecipient {
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public:
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explicit DeathNotifier(CameraManagerGlobal* cm) : mCameraManager(cm) {}
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protected:
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// IBinder::DeathRecipient implementation
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virtual void binderDied(const wp<IBinder>& who);
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private:
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const wp<CameraManagerGlobal> mCameraManager;
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};
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sp<DeathNotifier> mDeathNotifier;
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class CameraServiceListener final : public hardware::BnCameraServiceListener {
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public:
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explicit CameraServiceListener(CameraManagerGlobal* cm) : mCameraManager(cm) {}
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virtual binder::Status onStatusChanged(int32_t status, const String16& cameraId);
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virtual binder::Status onPhysicalCameraStatusChanged(int32_t status,
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const String16& cameraId, const String16& physicalCameraId);
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// Torch API not implemented yet
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virtual binder::Status onTorchStatusChanged(int32_t, const String16&) {
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return binder::Status::ok();
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}
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virtual binder::Status onTorchStrengthLevelChanged(const String16&, int32_t) {
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return binder::Status::ok();
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}
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virtual binder::Status onCameraAccessPrioritiesChanged();
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virtual binder::Status onCameraOpened(const String16&, const String16&) {
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return binder::Status::ok();
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}
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virtual binder::Status onCameraClosed(const String16&) {
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return binder::Status::ok();
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}
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private:
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const wp<CameraManagerGlobal> mCameraManager;
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};
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sp<CameraServiceListener> mCameraServiceListener;
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// Wrapper of ACameraManager_AvailabilityCallbacks so we can store it in std::set
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struct Callback {
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explicit Callback(const ACameraManager_AvailabilityCallbacks *callback) :
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mAvailable(callback->onCameraAvailable),
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mUnavailable(callback->onCameraUnavailable),
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mAccessPriorityChanged(nullptr),
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mPhysicalCamAvailable(nullptr),
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mPhysicalCamUnavailable(nullptr),
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mContext(callback->context) {}
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explicit Callback(const ACameraManager_ExtendedAvailabilityCallbacks *callback) :
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mAvailable(callback->availabilityCallbacks.onCameraAvailable),
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mUnavailable(callback->availabilityCallbacks.onCameraUnavailable),
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mAccessPriorityChanged(callback->onCameraAccessPrioritiesChanged),
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mPhysicalCamAvailable(callback->onPhysicalCameraAvailable),
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mPhysicalCamUnavailable(callback->onPhysicalCameraUnavailable),
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mContext(callback->availabilityCallbacks.context) {}
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bool operator == (const Callback& other) const {
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return (mAvailable == other.mAvailable &&
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mUnavailable == other.mUnavailable &&
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mAccessPriorityChanged == other.mAccessPriorityChanged &&
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mPhysicalCamAvailable == other.mPhysicalCamAvailable &&
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mPhysicalCamUnavailable == other.mPhysicalCamUnavailable &&
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mContext == other.mContext);
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}
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bool operator != (const Callback& other) const {
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return !(*this == other);
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}
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bool operator < (const Callback& other) const {
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wordered-compare-function-pointers"
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if (*this == other) return false;
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if (mContext != other.mContext) return mContext < other.mContext;
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if (mPhysicalCamAvailable != other.mPhysicalCamAvailable) {
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return mPhysicalCamAvailable < other.mPhysicalCamAvailable;
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}
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if (mPhysicalCamUnavailable != other.mPhysicalCamUnavailable) {
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return mPhysicalCamUnavailable < other.mPhysicalCamUnavailable;
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}
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if (mAccessPriorityChanged != other.mAccessPriorityChanged) {
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return mAccessPriorityChanged < other.mAccessPriorityChanged;
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}
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if (mAvailable != other.mAvailable) return mAvailable < other.mAvailable;
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return mUnavailable < other.mUnavailable;
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#pragma GCC diagnostic pop
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}
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bool operator > (const Callback& other) const {
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return (*this != other && !(*this < other));
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}
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ACameraManager_AvailabilityCallback mAvailable;
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ACameraManager_AvailabilityCallback mUnavailable;
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ACameraManager_AccessPrioritiesChangedCallback mAccessPriorityChanged;
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ACameraManager_PhysicalCameraAvailabilityCallback mPhysicalCamAvailable;
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ACameraManager_PhysicalCameraAvailabilityCallback mPhysicalCamUnavailable;
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void* mContext;
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};
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android::Condition mCallbacksCond;
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size_t mPendingCallbackCnt = 0;
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void onCallbackCalled();
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void drainPendingCallbacksLocked();
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std::set<Callback> mCallbacks;
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// definition of handler and message
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enum {
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kWhatSendSingleCallback,
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kWhatSendSingleAccessCallback,
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kWhatSendSinglePhysicalCameraCallback,
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};
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static const char* kCameraIdKey;
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static const char* kPhysicalCameraIdKey;
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static const char* kCallbackFpKey;
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static const char* kContextKey;
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static const nsecs_t kCallbackDrainTimeout;
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class CallbackHandler : public AHandler {
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public:
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CallbackHandler(wp<CameraManagerGlobal> parent) : mParent(parent) {}
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void onMessageReceived(const sp<AMessage> &msg) override;
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private:
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wp<CameraManagerGlobal> mParent;
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void notifyParent();
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void onMessageReceivedInternal(const sp<AMessage> &msg);
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};
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sp<CallbackHandler> mHandler;
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sp<ALooper> mCbLooper; // Looper thread where callbacks actually happen on
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sp<hardware::ICameraService> getCameraServiceLocked();
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void onCameraAccessPrioritiesChanged();
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void onStatusChanged(int32_t status, const String8& cameraId);
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void onStatusChangedLocked(int32_t status, const String8& cameraId);
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void onStatusChanged(int32_t status, const String8& cameraId, const String8& physicalCameraId);
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void onStatusChangedLocked(int32_t status, const String8& cameraId,
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const String8& physicalCameraId);
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// Utils for status
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static bool validStatus(int32_t status);
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static bool isStatusAvailable(int32_t status);
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bool supportsCamera2ApiLocked(const String8 &cameraId);
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// The sort logic must match the logic in
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// libcameraservice/common/CameraProviderManager.cpp::getAPI1CompatibleCameraDeviceIds
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struct CameraIdComparator {
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bool operator()(const String8& a, const String8& b) const {
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uint32_t aUint = 0, bUint = 0;
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bool aIsUint = base::ParseUint(a.c_str(), &aUint);
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bool bIsUint = base::ParseUint(b.c_str(), &bUint);
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// Uint device IDs first
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if (aIsUint && bIsUint) {
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return aUint < bUint;
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} else if (aIsUint) {
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return true;
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} else if (bIsUint) {
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return false;
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}
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// Simple string compare if both id are not uint
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return a < b;
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}
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};
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struct StatusAndHAL3Support {
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private:
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int32_t status = hardware::ICameraServiceListener::STATUS_NOT_PRESENT;
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mutable std::mutex mLock;
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std::set<String8> unavailablePhysicalIds;
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public:
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const bool supportsHAL3 = false;
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StatusAndHAL3Support(int32_t st, bool HAL3support):
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status(st), supportsHAL3(HAL3support) { };
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StatusAndHAL3Support() = default;
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bool addUnavailablePhysicalId(const String8& physicalCameraId);
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bool removeUnavailablePhysicalId(const String8& physicalCameraId);
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int32_t getStatus();
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void updateStatus(int32_t newStatus);
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std::set<String8> getUnavailablePhysicalIds();
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};
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// Map camera_id -> status
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std::map<String8, StatusAndHAL3Support, CameraIdComparator> mDeviceStatusMap;
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// For the singleton instance
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static Mutex sLock;
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static CameraManagerGlobal* sInstance;
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CameraManagerGlobal() {};
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~CameraManagerGlobal();
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};
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} // namespace acam;
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} // namespace android;
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/**
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* ACameraManager opaque struct definition
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* Leave outside of android namespace because it's NDK struct
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*/
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struct ACameraManager {
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ACameraManager() :
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mGlobalManager(&(android::acam::CameraManagerGlobal::getInstance())) {}
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~ACameraManager();
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camera_status_t getCameraIdList(ACameraIdList** cameraIdList);
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static void deleteCameraIdList(ACameraIdList* cameraIdList);
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camera_status_t getCameraCharacteristics(
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const char* cameraId, android::sp<ACameraMetadata>* characteristics);
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camera_status_t openCamera(const char* cameraId,
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ACameraDevice_StateCallbacks* callback,
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/*out*/ACameraDevice** device);
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private:
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enum {
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kCameraIdListNotInit = -1
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};
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android::Mutex mLock;
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android::sp<android::acam::CameraManagerGlobal> mGlobalManager;
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};
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#endif //_ACAMERA_MANAGER_H
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