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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 CDMCaps_h_
#define CDMCaps_h_
#include "nsString.h"
#include "mozilla/Monitor.h"
#include "nsIThread.h"
#include "nsTArray.h"
#include "mozilla/Attributes.h"
#include "SamplesWaitingForKey.h"
#include "gmp-decryption.h"
namespace mozilla {
// CDM capabilities; what keys a CDMProxy can use.
// Must be locked to access state.
class CDMCaps {
public:
CDMCaps();
~CDMCaps();
struct KeyStatus {
KeyStatus(const CencKeyId& aId,
const nsString& aSessionId,
GMPMediaKeyStatus aStatus)
: mId(aId)
, mSessionId(aSessionId)
, mStatus(aStatus)
{}
KeyStatus(const KeyStatus& aOther)
: mId(aOther.mId)
, mSessionId(aOther.mSessionId)
, mStatus(aOther.mStatus)
{}
bool operator==(const KeyStatus& aOther) const {
return mId == aOther.mId &&
mSessionId == aOther.mSessionId;
};
CencKeyId mId;
nsString mSessionId;
GMPMediaKeyStatus mStatus;
};
// Locks the CDMCaps. It must be locked to access its shared state.
// Threadsafe when locked.
class MOZ_STACK_CLASS AutoLock {
public:
explicit AutoLock(CDMCaps& aKeyCaps);
~AutoLock();
bool IsKeyUsable(const CencKeyId& aKeyId);
// Returns true if key status changed,
// i.e. the key status changed from usable to expired.
bool SetKeyStatus(const CencKeyId& aKeyId, const nsString& aSessionId, GMPMediaKeyStatus aStatus);
void GetKeyStatusesForSession(const nsAString& aSessionId,
nsTArray<KeyStatus>& aOutKeyStatuses);
void GetSessionIdsForKeyId(const CencKeyId& aKeyId,
nsTArray<nsCString>& aOutSessionIds);
// Ensures all keys for a session are marked as 'unknown', i.e. removed.
// Returns true if a key status was changed.
bool RemoveKeysForSession(const nsString& aSessionId);
// Notifies the SamplesWaitingForKey when key become usable.
void NotifyWhenKeyIdUsable(const CencKeyId& aKey,
SamplesWaitingForKey* aSamplesWaiting);
private:
// Not taking a strong ref, since this should be allocated on the stack.
CDMCaps& mData;
};
private:
void Lock();
void Unlock();
struct WaitForKeys {
WaitForKeys(const CencKeyId& aKeyId,
SamplesWaitingForKey* aListener)
: mKeyId(aKeyId)
, mListener(aListener)
{}
CencKeyId mKeyId;
RefPtr<SamplesWaitingForKey> mListener;
};
Monitor mMonitor;
nsTArray<KeyStatus> mKeyStatuses;
nsTArray<WaitForKeys> mWaitForKeys;
// It is not safe to copy this object.
CDMCaps(const CDMCaps&) = delete;
CDMCaps& operator=(const CDMCaps&) = delete;
};
} // namespace mozilla
#endif
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