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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=99: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : #ifndef include_dom_ipc_RemoteVideoDecoder_h
       7             : #define include_dom_ipc_RemoteVideoDecoder_h
       8             : 
       9             : #include "mozilla/RefPtr.h"
      10             : #include "mozilla/DebugOnly.h"
      11             : #include "MediaData.h"
      12             : #include "PlatformDecoderModule.h"
      13             : 
      14             : namespace mozilla {
      15             : namespace dom {
      16             : 
      17             : class VideoDecoderChild;
      18             : class RemoteDecoderModule;
      19             : 
      20             : // A MediaDataDecoder implementation that proxies through IPDL
      21             : // to a 'real' decoder in the GPU process.
      22             : // All requests get forwarded to a VideoDecoderChild instance that
      23             : // operates solely on the VideoDecoderManagerChild thread.
      24             : class RemoteVideoDecoder : public MediaDataDecoder
      25             : {
      26             : public:
      27             :   friend class RemoteDecoderModule;
      28             : 
      29             :   // MediaDataDecoder
      30             :   RefPtr<InitPromise> Init() override;
      31             :   RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;
      32             :   RefPtr<DecodePromise> Drain() override;
      33             :   RefPtr<FlushPromise> Flush() override;
      34             :   RefPtr<ShutdownPromise> Shutdown() override;
      35             :   bool IsHardwareAccelerated(nsACString& aFailureReason) const override;
      36             :   void SetSeekThreshold(const media::TimeUnit& aTime) override;
      37             : 
      38           0 :   const char* GetDescriptionName() const override { return "RemoteVideoDecoder"; }
      39             :   ConversionRequired NeedsConversion() const override;
      40             : 
      41             : private:
      42             :   RemoteVideoDecoder();
      43             :   ~RemoteVideoDecoder();
      44             : 
      45             :   // Only ever written to from the reader task queue (during the constructor and
      46             :   // destructor when we can guarantee no other threads are accessing it). Only
      47             :   // read from the manager thread.
      48             :   RefPtr<VideoDecoderChild> mActor;
      49             : };
      50             : 
      51             : // A PDM implementation that creates RemoteVideoDecoders.
      52             : // We currently require a 'wrapped' PDM in order to be able to answer SupportsMimeType
      53             : // and DecoderNeedsConversion. Ideally we'd check these over IPDL using the manager
      54             : // protocol
      55           0 : class RemoteDecoderModule : public PlatformDecoderModule
      56             : {
      57             : public:
      58             :   explicit RemoteDecoderModule(PlatformDecoderModule* aWrapped)
      59             :     : mWrapped(aWrapped)
      60             :   {}
      61             : 
      62             :   nsresult Startup() override;
      63             : 
      64             :   bool SupportsMimeType(const nsACString& aMimeType,
      65             :                         DecoderDoctorDiagnostics* aDiagnostics) const override;
      66             :   bool Supports(const TrackInfo& aTrackInfo,
      67             :                 DecoderDoctorDiagnostics* aDiagnostics) const override;
      68             : 
      69             :   already_AddRefed<MediaDataDecoder> CreateVideoDecoder(
      70             :     const CreateDecoderParams& aParams) override;
      71             : 
      72           0 :   already_AddRefed<MediaDataDecoder> CreateAudioDecoder(
      73             :     const CreateDecoderParams& aParams) override
      74             :   {
      75           0 :     return nullptr;
      76             :   }
      77             : 
      78             : private:
      79             :   RefPtr<PlatformDecoderModule> mWrapped;
      80             : };
      81             : 
      82             : } // namespace dom
      83             : } // namespace mozilla
      84             : 
      85             : #endif // include_dom_ipc_RemoteVideoDecoder_h