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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=99: */
+/* 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 include_dom_ipc_RemoteVideoDecoder_h
+#define include_dom_ipc_RemoteVideoDecoder_h
+
+#include "mozilla/RefPtr.h"
+#include "mozilla/DebugOnly.h"
+#include "MediaData.h"
+#include "PlatformDecoderModule.h"
+
+namespace mozilla {
+namespace dom {
+
+class VideoDecoderChild;
+class RemoteDecoderModule;
+
+// A MediaDataDecoder implementation that proxies through IPDL
+// to a 'real' decoder in the GPU process.
+// All requests get forwarded to a VideoDecoderChild instance that
+// operates solely on the VideoDecoderManagerChild thread.
+class RemoteVideoDecoder : public MediaDataDecoder
+{
+public:
+ friend class RemoteDecoderModule;
+
+ // MediaDataDecoder
+ RefPtr<InitPromise> Init() override;
+ void Input(MediaRawData* aSample) override;
+ void Flush() override;
+ void Drain() override;
+ void Shutdown() override;
+ bool IsHardwareAccelerated(nsACString& aFailureReason) const override;
+ void SetSeekThreshold(const media::TimeUnit& aTime) override;
+
+ const char* GetDescriptionName() const override { return "RemoteVideoDecoder"; }
+
+private:
+ explicit RemoteVideoDecoder(MediaDataDecoderCallback* aCallback);
+ ~RemoteVideoDecoder();
+
+ RefPtr<InitPromise> InitInternal();
+
+ // Only ever written to from the reader task queue (during the constructor and destructor
+ // when we can guarantee no other threads are accessing it). Only read from the manager
+ // thread.
+ RefPtr<VideoDecoderChild> mActor;
+#ifdef DEBUG
+ MediaDataDecoderCallback* mCallback;
+#endif
+};
+
+// A PDM implementation that creates RemoteVideoDecoders.
+// We currently require a 'wrapped' PDM in order to be able to answer SupportsMimeType
+// and DecoderNeedsConversion. Ideally we'd check these over IPDL using the manager
+// protocol
+class RemoteDecoderModule : public PlatformDecoderModule
+{
+public:
+ explicit RemoteDecoderModule(PlatformDecoderModule* aWrapped)
+ : mWrapped(aWrapped)
+ {}
+
+ nsresult Startup() override;
+
+ bool SupportsMimeType(const nsACString& aMimeType,
+ DecoderDoctorDiagnostics* aDiagnostics) const override;
+
+ ConversionRequired DecoderNeedsConversion(
+ const TrackInfo& aConfig) const override;
+
+ already_AddRefed<MediaDataDecoder> CreateVideoDecoder(
+ const CreateDecoderParams& aParams) override;
+
+ already_AddRefed<MediaDataDecoder> CreateAudioDecoder(
+ const CreateDecoderParams& aParams) override
+ {
+ return nullptr;
+ }
+
+private:
+ RefPtr<PlatformDecoderModule> mWrapped;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // include_dom_ipc_RemoteVideoDecoder_h