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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_LAYERS_ANDROID_HARDWARE_BUFFER
#define MOZILLA_LAYERS_ANDROID_HARDWARE_BUFFER
#include <android/hardware_buffer.h>
#include <atomic>
#include <unordered_map>
#include "mozilla/layers/TextureClient.h"
#include "mozilla/gfx/Types.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Monitor.h"
#include "mozilla/RefPtr.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/ThreadSafeWeakPtr.h"
#include "mozilla/UniquePtrExtensions.h"
namespace mozilla {
namespace layers {
/**
* AndroidHardwareBufferApi provides apis for managing AHardwareBuffer.
* The apis are supported since Android O(APIVersion 26).
*/
class AndroidHardwareBufferApi final {
public:
static void Init();
static void Shutdown();
static AndroidHardwareBufferApi* Get() { return sInstance; }
void Allocate(const AHardwareBuffer_Desc* aDesc,
AHardwareBuffer** aOutBuffer);
void Acquire(AHardwareBuffer* aBuffer);
void Release(AHardwareBuffer* aBuffer);
void Describe(const AHardwareBuffer* aBuffer, AHardwareBuffer_Desc* aOutDesc);
int Lock(AHardwareBuffer* aBuffer, uint64_t aUsage, int32_t aFence,
const ARect* aRect, void** aOutVirtualAddress);
int Unlock(AHardwareBuffer* aBuffer, int32_t* aFence);
int SendHandleToUnixSocket(const AHardwareBuffer* aBuffer, int aSocketFd);
int RecvHandleFromUnixSocket(int aSocketFd, AHardwareBuffer** aOutBuffer);
private:
AndroidHardwareBufferApi();
bool Load();
using _AHardwareBuffer_allocate = int (*)(const AHardwareBuffer_Desc* desc,
AHardwareBuffer** outBuffer);
using _AHardwareBuffer_acquire = void (*)(AHardwareBuffer* buffer);
using _AHardwareBuffer_release = void (*)(AHardwareBuffer* buffer);
using _AHardwareBuffer_describe = void (*)(const AHardwareBuffer* buffer,
AHardwareBuffer_Desc* outDesc);
using _AHardwareBuffer_lock = int (*)(AHardwareBuffer* buffer, uint64_t usage,
int32_t fence, const ARect* rect,
void** outVirtualAddress);
using _AHardwareBuffer_unlock = int (*)(AHardwareBuffer* buffer,
int32_t* fence);
using _AHardwareBuffer_sendHandleToUnixSocket =
int (*)(const AHardwareBuffer* buffer, int socketFd);
using _AHardwareBuffer_recvHandleFromUnixSocket =
int (*)(int socketFd, AHardwareBuffer** outBuffer);
_AHardwareBuffer_allocate mAHardwareBuffer_allocate = nullptr;
_AHardwareBuffer_acquire mAHardwareBuffer_acquire = nullptr;
_AHardwareBuffer_release mAHardwareBuffer_release = nullptr;
_AHardwareBuffer_describe mAHardwareBuffer_describe = nullptr;
_AHardwareBuffer_lock mAHardwareBuffer_lock = nullptr;
_AHardwareBuffer_unlock mAHardwareBuffer_unlock = nullptr;
_AHardwareBuffer_sendHandleToUnixSocket
mAHardwareBuffer_sendHandleToUnixSocket = nullptr;
_AHardwareBuffer_recvHandleFromUnixSocket
mAHardwareBuffer_recvHandleFromUnixSocket = nullptr;
static StaticAutoPtr<AndroidHardwareBufferApi> sInstance;
};
/**
* AndroidHardwareBuffer is a wrapper of AHardwareBuffer. AHardwareBuffer wraps
* android GraphicBuffer. It is supported since Android O(APIVersion 26).
* The manager is mainly used for release fences delivery from
* host side to client side.
*/
class AndroidHardwareBuffer
: public SupportsThreadSafeWeakPtr<AndroidHardwareBuffer> {
public:
MOZ_DECLARE_REFCOUNTED_TYPENAME(AndroidHardwareBuffer)
static already_AddRefed<AndroidHardwareBuffer> Create(
gfx::IntSize aSize, gfx::SurfaceFormat aFormat);
virtual ~AndroidHardwareBuffer();
int Lock(uint64_t aUsage, const ARect* aRect, void** aOutVirtualAddress);
int Unlock();
AHardwareBuffer* GetNativeBuffer() const { return mNativeBuffer; }
void SetAcquireFence(UniqueFileHandle&& aFenceFd);
void SetReleaseFence(UniqueFileHandle&& aFenceFd);
UniqueFileHandle GetAndResetReleaseFence();
UniqueFileHandle GetAndResetAcquireFence();
UniqueFileHandle GetAcquireFence() const;
const gfx::IntSize mSize;
const uint32_t mStride;
const gfx::SurfaceFormat mFormat;
const uint64_t mId;
protected:
AndroidHardwareBuffer(AHardwareBuffer* aNativeBuffer, gfx::IntSize aSize,
uint32_t aStride, gfx::SurfaceFormat aFormat,
uint64_t aId);
void SetReleaseFence(UniqueFileHandle&& aFenceFd,
const MonitorAutoLock& aAutoLock);
AHardwareBuffer* mNativeBuffer;
// When true, AndroidHardwareBuffer is registered to
// AndroidHardwareBufferManager.
bool mIsRegistered;
// protected by AndroidHardwareBufferManager::mMonitor
// FileDescriptor of release fence.
// Release fence is a fence that is used for waiting until usage/composite of
// AHardwareBuffer is ended. The fence is delivered via ImageBridge.
UniqueFileHandle mReleaseFenceFd;
// FileDescriptor of acquire fence.
// Acquire fence is a fence that is used for waiting until rendering to
// its AHardwareBuffer is completed.
UniqueFileHandle mAcquireFenceFd;
static uint64_t GetNextId();
friend class AndroidHardwareBufferManager;
};
/**
* AndroidHardwareBufferManager manages AndroidHardwareBuffers that is
* allocated by client side.
* Host side only uses mMonitor for thread safety of AndroidHardwareBuffer.
*/
class AndroidHardwareBufferManager {
public:
static void Init();
static void Shutdown();
AndroidHardwareBufferManager();
static AndroidHardwareBufferManager* Get() { return sInstance; }
void Register(RefPtr<AndroidHardwareBuffer> aBuffer);
void Unregister(AndroidHardwareBuffer* aBuffer);
already_AddRefed<AndroidHardwareBuffer> GetBuffer(uint64_t aBufferId);
Monitor& GetMonitor() { return mMonitor; }
private:
Monitor mMonitor MOZ_UNANNOTATED;
std::unordered_map<uint64_t, ThreadSafeWeakPtr<AndroidHardwareBuffer>>
mBuffers;
static StaticAutoPtr<AndroidHardwareBufferManager> sInstance;
};
} // namespace layers
} // namespace mozilla
#endif
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