1 files changed, 101 insertions, 0 deletions
diff --git a/dom/media/CloneableWithRangeMediaResource.h b/dom/media/CloneableWithRangeMediaResource.h
new file mode 100644
index 0000000000..1c0bab3c1b
--- /dev/null
+++ b/dom/media/CloneableWithRangeMediaResource.h
@@ -0,0 +1,101 @@
+/* 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/. */
+
+#ifndef mozilla_dom_media_CloneableWithRangeMediaResource_h
+#define mozilla_dom_media_CloneableWithRangeMediaResource_h
+
+#include "BaseMediaResource.h"
+#include "nsICloneableInputStream.h"
+
+namespace mozilla {
+
+class CloneableWithRangeMediaResource : public BaseMediaResource {
+ public:
+  CloneableWithRangeMediaResource(MediaResourceCallback* aCallback,
+                                  nsIChannel* aChannel, nsIURI* aURI,
+                                  nsIInputStream* aStream, uint64_t aSize)
+      : BaseMediaResource(aCallback, aChannel, aURI),
+        mStream(do_QueryInterface(aStream)),
+        mSize(aSize),
+        mInitialized(false) {
+    MOZ_ASSERT(mStream);
+  }
+
+  ~CloneableWithRangeMediaResource() = default;
+
+  // Main thread
+  nsresult Open(nsIStreamListener** aStreamListener) override;
+  RefPtr<GenericPromise> Close() override;
+  void Suspend(bool aCloseImmediately) override {}
+  void Resume() override {}
+  already_AddRefed<nsIPrincipal> GetCurrentPrincipal() override;
+  bool HadCrossOriginRedirects() override;
+  nsresult ReadFromCache(char* aBuffer, int64_t aOffset,
+                         uint32_t aCount) override;
+
+  // These methods are called off the main thread.
+
+  // Other thread
+  void SetReadMode(MediaCacheStream::ReadMode aMode) override {}
+  void SetPlaybackRate(uint32_t aBytesPerSecond) override {}
+  nsresult ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount,
+                  uint32_t* aBytes) override;
+  // (Probably) file-based, caching recommended.
+  bool ShouldCacheReads() override { return true; }
+
+  // Any thread
+  void Pin() override {}
+  void Unpin() override {}
+
+  double GetDownloadRate(bool* aIsReliable) override {
+    // The data's all already here
+    *aIsReliable = true;
+    return 100 * 1024 * 1024;  // arbitray, use 100MB/s
+  }
+
+  int64_t GetLength() override {
+    MaybeInitialize();
+    return mSize;
+  }
+
+  int64_t GetNextCachedData(int64_t aOffset) override {
+    MaybeInitialize();
+    return (aOffset < (int64_t)mSize) ? aOffset : -1;
+  }
+
+  int64_t GetCachedDataEnd(int64_t aOffset) override {
+    MaybeInitialize();
+    return std::max(aOffset, (int64_t)mSize);
+  }
+
+  bool IsDataCachedToEndOfResource(int64_t aOffset) override { return true; }
+  bool IsTransportSeekable() override { return true; }
+
+  nsresult GetCachedRanges(MediaByteRangeSet& aRanges) override;
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override {
+    return BaseMediaResource::SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
+    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+ private:
+  void MaybeInitialize();
+
+  // Input stream for the media data. This can be used from any
+  // thread.
+  nsCOMPtr<nsICloneableInputStreamWithRange> mStream;
+
+  // The stream size.
+  uint64_t mSize;
+
+  bool mInitialized;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_dom_media_CloneableWithRangeMediaResource_h