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/*
* Copyright (C) 2019 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.
*/
#ifndef ANDROID_MEDIA_ECO_SERVICE_H_
#define ANDROID_MEDIA_ECO_SERVICE_H_
#include <android/media/eco/BnECOService.h>
#include <binder/BinderService.h>
#include <list>
#include "eco/ECODebug.h"
#include "eco/ECOSession.h"
namespace android {
namespace media {
namespace eco {
using android::sp;
using android::binder::Status;
using android::media::eco::ECOSession;
/**
* ECO (Encoder Camera Optimization) service.
*
* ECOService creates and manages EcoSession to relay feedback information between one or multiple
* ECOServiceStatsProvider and ECOServiceInfoListener. The relationship can be many-to-many. In
* general, ECOServiceStatsProvider extracts information from an encoder for a given encoding
* session. EcoSession then relays the encoder information to any subscribed
* ECOServiceInfoListener.
*
* Internally, ECOService creates an ECOSession for each encoding session. Upon start, both
* ECOServiceStatsProvider and ECOServiceInfoListener should call obtainSession to get the
* ECOSession instance. After that, ECOServiceStatsProvider should push Stats to ECOSession and
* ECOServiceInfoListener should listen to the info from ECOSession. Upon finish, both
* ECOServiceStatsProvider and ECOServiceInfoListener should remove themselves from ECOSession.
* Then ECOService will safely destroy the ECOSession.
*/
class ECOService : public BinderService<ECOService>,
public BnECOService,
public virtual IBinder::DeathRecipient {
friend class BinderService<ECOService>;
public:
ECOService();
virtual ~ECOService() = default;
virtual Status obtainSession(int32_t width, int32_t height, bool isCameraRecording,
sp<IECOSession>* _aidl_return);
virtual Status getNumOfSessions(int32_t* _aidl_return);
virtual Status getSessions(::std::vector<sp<IBinder>>* _aidl_return);
// Implementation of BinderService<T>
static char const* getServiceName() { return "media.ecoservice"; }
// IBinder::DeathRecipient implementation
virtual void binderDied(const wp<IBinder>& who);
virtual status_t dump(int fd, const Vector<String16>& args);
private:
// Lock guarding ECO service state
Mutex mServiceLock;
struct SessionConfig {
int32_t mWidth;
int32_t mHeight;
bool mIsCameraRecording;
SessionConfig(int w, int h, bool isCameraRecording)
: mWidth(w), mHeight(h), mIsCameraRecording(isCameraRecording) {}
bool operator==(const SessionConfig& cfg) {
return mWidth == cfg.mWidth && mHeight == cfg.mHeight &&
mIsCameraRecording == cfg.mIsCameraRecording;
}
};
friend bool operator==(const SessionConfig& p1, const SessionConfig& p2) {
return p1.mWidth == p2.mWidth && p1.mHeight == p2.mHeight &&
p1.mIsCameraRecording == p2.mIsCameraRecording;
}
// Hash function for mSessionConfigToSessionMap.
// TODO(hkuang): Add test for this hash function.
struct SessionConfigHash {
size_t operator()(const SessionConfig& cfg) const {
// Generate a hash by bit shifting and concatenation.
return cfg.mWidth | (cfg.mHeight << 16) | ((int32_t)cfg.mIsCameraRecording << 31);
}
};
// Map from SessionConfig to session.
std::unordered_map<SessionConfig, wp<ECOSession>, SessionConfigHash> mSessionConfigToSessionMap;
using MapIterType =
std::unordered_map<SessionConfig, wp<ECOSession>, SessionConfigHash>::iterator;
// A helpful function to traverse the mSessionConfigToSessionMap, remove the entry that
// does not exist any more and call |callback| when the entry is valid.
void SanitizeSession(const std::function<void(MapIterType it)>& callback);
};
} // namespace eco
} // namespace media
} // namespace android
#endif // ANDROID_MEDIA_ECO_SERVICE_H_
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