gecko-dev/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.h

/* -*- 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(GMPVideoDecoder_h_)
#define GMPVideoDecoder_h_

#include "GMPVideoDecoderProxy.h"
#include "ImageContainer.h"
#include "MediaDataDecoderProxy.h"
#include "MediaInfo.h"
#include "PlatformDecoderModule.h"
#include "mozIGeckoMediaPluginService.h"

namespace mozilla {

struct GMPVideoDecoderParams
{
  explicit GMPVideoDecoderParams(const CreateDecoderParams& aParams);

  const VideoInfo& mConfig;
  TaskQueue* mTaskQueue;
  layers::ImageContainer* mImageContainer;
  layers::LayersBackend mLayersBackend;
  RefPtr<GMPCrashHelper> mCrashHelper;
};

class GMPVideoDecoder : public MediaDataDecoder,
                        public GMPVideoDecoderCallbackProxy
{
public:
  explicit GMPVideoDecoder(const GMPVideoDecoderParams& aParams);

  RefPtr<InitPromise> Init() override;
  RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;
  RefPtr<DecodePromise> Drain() override;
  RefPtr<FlushPromise> Flush() override;
  RefPtr<ShutdownPromise> Shutdown() override;
  const char* GetDescriptionName() const override
  {
    return "GMP video decoder";
  }
  ConversionRequired NeedsConversion() const override
  {
    return mConvertToAnnexB ? ConversionRequired::kNeedAnnexB
                            : ConversionRequired::kNeedAVCC;
  }

  // GMPVideoDecoderCallbackProxy
  // All those methods are called on the GMP thread.
  void Decoded(GMPVideoi420Frame* aDecodedFrame) override;
  void ReceivedDecodedReferenceFrame(const uint64_t aPictureId) override;
  void ReceivedDecodedFrame(const uint64_t aPictureId) override;
  void InputDataExhausted() override;
  void DrainComplete() override;
  void ResetComplete() override;
  void Error(GMPErr aErr) override;
  void Terminated() override;

protected:
  virtual void InitTags(nsTArray<nsCString>& aTags);
  virtual nsCString GetNodeId();
  virtual uint32_t DecryptorId() const { return 0; }
  virtual GMPUniquePtr<GMPVideoEncodedFrame> CreateFrame(MediaRawData* aSample);
  virtual const VideoInfo& GetConfig() const;

private:

  class GMPInitDoneCallback : public GetGMPVideoDecoderCallback
  {
  public:
    explicit GMPInitDoneCallback(GMPVideoDecoder* aDecoder)
      : mDecoder(aDecoder)
    {
    }

    void Done(GMPVideoDecoderProxy* aGMP, GMPVideoHost* aHost) override
    {
      mDecoder->GMPInitDone(aGMP, aHost);
    }

  private:
    RefPtr<GMPVideoDecoder> mDecoder;
  };
  void GMPInitDone(GMPVideoDecoderProxy* aGMP, GMPVideoHost* aHost);

  const VideoInfo mConfig;
  nsCOMPtr<mozIGeckoMediaPluginService> mMPS;
  GMPVideoDecoderProxy* mGMP;
  GMPVideoHost* mHost;
  bool mConvertNALUnitLengths;
  MozPromiseHolder<InitPromise> mInitPromise;
  RefPtr<GMPCrashHelper> mCrashHelper;

  int64_t mLastStreamOffset = 0;
  RefPtr<layers::ImageContainer> mImageContainer;

  MozPromiseHolder<DecodePromise> mDecodePromise;
  MozPromiseHolder<DecodePromise> mDrainPromise;
  MozPromiseHolder<FlushPromise> mFlushPromise;
  DecodedData mDecodedData;
  bool mConvertToAnnexB = false;
};

} // namespace mozilla

#endif // GMPVideoDecoder_h_