1 files changed, 90 insertions, 0 deletions
diff --git a/dom/media/ipc/RemoteVideoDecoder.h b/dom/media/ipc/RemoteVideoDecoder.h
new file mode 100644
index 000000000..3c8e86bba
--- /dev/null
+++ b/dom/media/ipc/RemoteVideoDecoder.h
@@ -0,0 +1,90 @@
+/* -*- 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