зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.4 KiB
C++
123 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef CDMCaps_h_
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#define CDMCaps_h_
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#include "nsString.h"
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#include "nsAutoPtr.h"
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#include "mozilla/Monitor.h"
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#include "nsIThread.h"
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#include "nsTArray.h"
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#include "mozilla/Attributes.h"
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#include "SamplesWaitingForKey.h"
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#include "gmp-decryption.h"
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namespace mozilla {
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// CDM capabilities; what keys a CDMProxy can use, and whether it can decrypt, or
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// decrypt-and-decode on a per stream basis. Must be locked to access state.
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class CDMCaps {
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public:
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CDMCaps();
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~CDMCaps();
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struct KeyStatus {
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KeyStatus(const CencKeyId& aId,
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const nsString& aSessionId,
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GMPMediaKeyStatus aStatus)
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: mId(aId)
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, mSessionId(aSessionId)
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, mStatus(aStatus)
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{}
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KeyStatus(const KeyStatus& aOther)
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: mId(aOther.mId)
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, mSessionId(aOther.mSessionId)
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, mStatus(aOther.mStatus)
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{}
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bool operator==(const KeyStatus& aOther) const {
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return mId == aOther.mId &&
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mSessionId == aOther.mSessionId;
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};
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CencKeyId mId;
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nsString mSessionId;
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GMPMediaKeyStatus mStatus;
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};
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// Locks the CDMCaps. It must be locked to access its shared state.
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// Threadsafe when locked.
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class MOZ_STACK_CLASS AutoLock {
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public:
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explicit AutoLock(CDMCaps& aKeyCaps);
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~AutoLock();
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// Returns true if the capabilities of the CDM are known, i.e. they have
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// been reported by the CDM to Gecko.
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bool AreCapsKnown();
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bool IsKeyUsable(const CencKeyId& aKeyId);
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// Returns true if key status changed,
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// i.e. the key status changed from usable to expired.
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bool SetKeyStatus(const CencKeyId& aKeyId, const nsString& aSessionId, GMPMediaKeyStatus aStatus);
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void GetKeyStatusesForSession(const nsAString& aSessionId,
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nsTArray<KeyStatus>& aOutKeyStatuses);
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// Sets the capabilities of the CDM. aCaps is the logical OR of the
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// GMP_EME_CAP_* flags from gmp-decryption.h.
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void SetCaps(uint64_t aCaps);
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bool CanDecryptAndDecodeAudio();
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bool CanDecryptAndDecodeVideo();
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bool CanDecryptAudio();
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bool CanDecryptVideo();
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void CallOnMainThreadWhenCapsAvailable(nsIRunnable* aContinuation);
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// Notifies the SamplesWaitingForKey when key become usable.
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void NotifyWhenKeyIdUsable(const CencKeyId& aKey,
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SamplesWaitingForKey* aSamplesWaiting);
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private:
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// Not taking a strong ref, since this should be allocated on the stack.
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CDMCaps& mData;
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};
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private:
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void Lock();
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void Unlock();
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bool HasCap(uint64_t);
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struct WaitForKeys {
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WaitForKeys(const CencKeyId& aKeyId,
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SamplesWaitingForKey* aListener)
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: mKeyId(aKeyId)
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, mListener(aListener)
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{}
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CencKeyId mKeyId;
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nsRefPtr<SamplesWaitingForKey> mListener;
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};
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Monitor mMonitor;
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nsTArray<KeyStatus> mKeyStatuses;
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nsTArray<WaitForKeys> mWaitForKeys;
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nsTArray<nsRefPtr<nsIRunnable>> mWaitForCaps;
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uint64_t mCaps;
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// It is not safe to copy this object.
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CDMCaps(const CDMCaps&) = delete;
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CDMCaps& operator=(const CDMCaps&) = delete;
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};
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} // namespace mozilla
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#endif
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