Use in-tree dav1d for AV1 decoding

dom/media/platforms/agnostic/Dav1dDecoder.h

@@ -0,0 +1,61 @@
+/* -*- 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/. */
+
+#if !defined(Dav1dDecoder_h_)
+#define Dav1dDecoder_h_
+
+#include "PlatformDecoderModule.h"
+#include "mozilla/Span.h"
+
+#include <stdint.h>
+
+typedef struct Dav1dContext Dav1dContext;
+typedef struct Dav1dPicture Dav1dPicture;
+
+namespace mozilla {
+
+class Dav1dDecoder : public MediaDataDecoder
+{
+public:
+  explicit Dav1dDecoder(const CreateDecoderParams& aParams);
+
+  RefPtr<InitPromise> Init() override;
+  void Input(MediaRawData* aSample) override;
+  void Flush() override;
+  void Drain() override;
+  void Shutdown() override;
+  const char* GetDescriptionName() const override
+  {
+    return "dav1d (AV1) video decoder";
+  }
+
+  // Return true if aMimeType is a one of the strings used
+  // by our demuxers to identify AV1 streams.
+  static bool IsAV1(const nsACString& aMimeType);
+
+  // Return the frame dimensions from a sequence header, when one is present.
+  static nsIntSize GetFrameSize(Span<const uint8_t> aBuffer);
+
+private:
+  ~Dav1dDecoder();
+  void ProcessDecode(MediaRawData* aSample);
+  MediaResult DoDecode(MediaRawData* aSample);
+  MediaResult DrainOutput();
+  MediaResult OutputPicture(const Dav1dPicture& aPicture);
+  void ProcessDrain();
+
+  const RefPtr<layers::ImageContainer> mImageContainer;
+  const RefPtr<TaskQueue> mTaskQueue;
+  MediaDataDecoderCallback* mCallback;
+  Atomic<bool> mIsFlushing;
+
+  Dav1dContext* mDecoder;
+
+  const VideoInfo& mInfo;
+};
+
+} // namespace mozilla
+
+#endif // Dav1dDecoder_h_