/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 GMPVideoDecoderChild_h_
#define GMPVideoDecoderChild_h_

#include "nsString.h"
#include "mozilla/gmp/PGMPVideoDecoderChild.h"
#include "gmp-video-decode.h"
#include "GMPSharedMemManager.h"
#include "GMPVideoHost.h"
#include "mozilla/gmp/GMPTypes.h"

namespace mozilla::gmp {

class GMPContentChild;

class GMPVideoDecoderChild : public PGMPVideoDecoderChild,
                             public GMPVideoDecoderCallback,
                             public GMPSharedMemManager {
  friend class PGMPVideoDecoderChild;

 public:
  // Mark AddRef and Release as `final`, as they overload pure virtual
  // implementations in PGMPVideoDecoderChild.
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GMPVideoDecoderChild, final);

  explicit GMPVideoDecoderChild(GMPContentChild* aPlugin);

  void Init(GMPVideoDecoder* aDecoder);
  GMPVideoHostImpl& Host();

  // GMPVideoDecoderCallback
  void Decoded(GMPVideoi420Frame* decodedFrame) override;
  void ReceivedDecodedReferenceFrame(const uint64_t pictureId) override;
  void ReceivedDecodedFrame(const uint64_t pictureId) override;
  void InputDataExhausted() override;
  void DrainComplete() override;
  void ResetComplete() override;
  void Error(GMPErr aError) override;

  // GMPSharedMemManager
  bool Alloc(size_t aSize, Shmem* aMem) override;
  void Dealloc(Shmem&& aMem) override;

 private:
  virtual ~GMPVideoDecoderChild();

  // PGMPVideoDecoderChild
  mozilla::ipc::IPCResult RecvInitDecode(const GMPVideoCodec& aCodecSettings,
                                         nsTArray<uint8_t>&& aCodecSpecific,
                                         const int32_t& aCoreCount);
  mozilla::ipc::IPCResult RecvDecode(
      const GMPVideoEncodedFrameData& aInputFrame, const bool& aMissingFrames,
      nsTArray<uint8_t>&& aCodecSpecificInfo, const int64_t& aRenderTimeMs);
  mozilla::ipc::IPCResult RecvChildShmemForPool(Shmem&& aFrameBuffer);
  mozilla::ipc::IPCResult RecvReset();
  mozilla::ipc::IPCResult RecvDrain();
  mozilla::ipc::IPCResult RecvDecodingComplete();

  GMPContentChild* mPlugin;
  GMPVideoDecoder* mVideoDecoder;
  GMPVideoHostImpl mVideoHost;

  // Non-zero when a GMP is blocked spinning the IPC message loop while
  // waiting on an NeedShmem to complete.
  int mNeedShmemIntrCount;
  bool mPendingDecodeComplete;
};

}  // namespace mozilla::gmp

#endif  // GMPVideoDecoderChild_h_