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GMPVideoHost.h (2017B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef GMPVideoHost_h_
      7 #define GMPVideoHost_h_
      8 
      9 #include "gmp-video-frame.h"
     10 #include "gmp-video-host.h"
     11 #include "gmp-video-plane.h"
     12 #include "nsTArray.h"
     13 
     14 namespace mozilla::gmp {
     15 
     16 class GMPSharedMemManager;
     17 class GMPVideoEncodedFrameImpl;
     18 class GMPVideoi420FrameImpl;
     19 
     20 class GMPVideoHostImpl : public GMPVideoHost {
     21 public:
     22  explicit GMPVideoHostImpl(GMPSharedMemManager* aSharedMemMgr);
     23  virtual ~GMPVideoHostImpl();
     24 
     25  // Used for shared memory allocation and deallocation.
     26  GMPSharedMemManager* SharedMemMgr();
     27  void DoneWithAPI();
     28  void ActorDestroyed();
     29  void EncodedFrameCreated(GMPVideoEncodedFrameImpl* aEncodedFrame);
     30  void EncodedFrameDestroyed(GMPVideoEncodedFrameImpl* aFrame);
     31  void DecodedFrameCreated(GMPVideoi420FrameImpl* aDecodedFrame);
     32  void DecodedFrameDestroyed(GMPVideoi420FrameImpl* aFrame);
     33 
     34  bool IsEncodedFramesEmpty() const { return mEncodedFrames.IsEmpty(); }
     35 
     36  bool IsDecodedFramesEmpty() const { return mDecodedFrames.IsEmpty(); }
     37 
     38  // GMPVideoHost
     39  GMPErr CreateFrame(GMPVideoFrameFormat aFormat,
     40                     GMPVideoFrame** aFrame) override;
     41  GMPErr CreatePlane(GMPPlane** aPlane) override;
     42 
     43 private:
     44  // All shared memory allocations have to be made by an IPDL actor.
     45  // This is a reference to the owning actor. If this reference is
     46  // null then the actor has died and all allocations must fail.
     47  GMPSharedMemManager* mSharedMemMgr;
     48 
     49  // We track all of these things because they need to handle further
     50  // allocations through us and we need to notify them when they
     51  // can't use us any more.
     52  nsTArray<GMPVideoEncodedFrameImpl*> mEncodedFrames;
     53  nsTArray<GMPVideoi420FrameImpl*> mDecodedFrames;
     54 };
     55 
     56 }  // namespace mozilla::gmp
     57 
     58 #endif  // GMPVideoHost_h_