зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
2.7 KiB
C++
95 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
|
/* 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/. */
|
|
|
|
#if !defined(MediaSystemResourceClient_h_)
|
|
#define MediaSystemResourceClient_h_
|
|
|
|
#include "MediaSystemResourceManager.h"
|
|
#include "MediaSystemResourceTypes.h"
|
|
#include "mozilla/Atomics.h"
|
|
#include "mozilla/media/MediaSystemResourceTypes.h"
|
|
#include "mozilla/Monitor.h"
|
|
#include "mozilla/RefPtr.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class MediaSystemResourceManager;
|
|
|
|
|
|
/**
|
|
* This is a base class for listener callbacks.
|
|
* This callback is invoked when the media system resource reservation state
|
|
* is changed.
|
|
*/
|
|
class MediaSystemResourceReservationListener {
|
|
public:
|
|
virtual void ResourceReserved() = 0;
|
|
virtual void ResourceReserveFailed() = 0;
|
|
};
|
|
|
|
/**
|
|
* MediaSystemResourceClient is used to reserve a media system resource
|
|
* like hw decoder. When system has a limitation of a media resource,
|
|
* use this class to mediate use rights of the resource.
|
|
*/
|
|
class MediaSystemResourceClient
|
|
{
|
|
public:
|
|
|
|
// Enumeration for the valid decoding states
|
|
enum ResourceState {
|
|
RESOURCE_STATE_START,
|
|
RESOURCE_STATE_WAITING,
|
|
RESOURCE_STATE_ACQUIRED,
|
|
RESOURCE_STATE_NOT_ACQUIRED,
|
|
RESOURCE_STATE_END
|
|
};
|
|
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaSystemResourceClient)
|
|
|
|
explicit MediaSystemResourceClient(MediaSystemResourceType aReourceType);
|
|
|
|
bool SetListener(MediaSystemResourceReservationListener* aListener);
|
|
|
|
// Try to acquire media resource asynchronously.
|
|
// If the resource is used by others, wait until acquired.
|
|
void Acquire();
|
|
|
|
// Try to acquire media resource synchronously. If the resource is not immediately
|
|
// available, fail to acquire it.
|
|
// return false if resource is not acquired.
|
|
// return true if resource is acquired.
|
|
//
|
|
// This function should not be called on ImageBridge thread.
|
|
// It should be used only for compatibility with legacy code.
|
|
bool AcquireSyncNoWait();
|
|
|
|
void ReleaseResource();
|
|
|
|
private:
|
|
~MediaSystemResourceClient();
|
|
|
|
RefPtr<MediaSystemResourceManager> mManager;
|
|
const MediaSystemResourceType mResourceType;
|
|
const uint32_t mId;
|
|
|
|
// Modified only by MediaSystemResourceManager.
|
|
// Accessed and modified with MediaSystemResourceManager::mReentrantMonitor held.
|
|
MediaSystemResourceReservationListener* mListener;
|
|
ResourceState mResourceState;
|
|
bool mIsSync;
|
|
ReentrantMonitor* mAcquireSyncWaitMonitor;
|
|
bool* mAcquireSyncWaitDone;
|
|
|
|
static mozilla::Atomic<uint32_t> sSerialCounter;
|
|
|
|
friend class MediaSystemResourceManager;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|