1 files changed, 161 insertions, 0 deletions
diff --git a/dom/media/mediasource/SourceBufferResource.h b/dom/media/mediasource/SourceBufferResource.h
new file mode 100644
index 000000000..26ed74602
--- /dev/null
+++ b/dom/media/mediasource/SourceBufferResource.h
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_SOURCEBUFFERRESOURCE_H_
+#define MOZILLA_SOURCEBUFFERRESOURCE_H_
+
+#include "MediaCache.h"
+#include "MediaResource.h"
+#include "ResourceQueue.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+#include "nsCOMPtr.h"
+#include "nsError.h"
+#include "nsIPrincipal.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "nscore.h"
+#include "mozilla/Logging.h"
+
+#define UNIMPLEMENTED() { /* Logging this is too spammy to do by default */ }
+
+class nsIStreamListener;
+
+namespace mozilla {
+
+class MediaDecoder;
+class MediaByteBuffer;
+
+namespace dom {
+
+class SourceBuffer;
+
+} // namespace dom
+
+class SourceBufferResource final : public MediaResource
+{
+public:
+  explicit SourceBufferResource(const nsACString& aType);
+  nsresult Close() override;
+  void Suspend(bool aCloseImmediately) override { UNIMPLEMENTED(); }
+  void Resume() override { UNIMPLEMENTED(); }
+  already_AddRefed<nsIPrincipal> GetCurrentPrincipal() override { UNIMPLEMENTED(); return nullptr; }
+  already_AddRefed<MediaResource> CloneData(MediaResourceCallback*) override { UNIMPLEMENTED(); return nullptr; }
+  void SetReadMode(MediaCacheStream::ReadMode aMode) override { UNIMPLEMENTED(); }
+  void SetPlaybackRate(uint32_t aBytesPerSecond) override { UNIMPLEMENTED(); }
+  nsresult ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes) override;
+  int64_t Tell() override { return mOffset; }
+  void Pin() override { UNIMPLEMENTED(); }
+  void Unpin() override { UNIMPLEMENTED(); }
+  double GetDownloadRate(bool* aIsReliable) override { UNIMPLEMENTED(); *aIsReliable = false; return 0; }
+  int64_t GetLength() override { return mInputBuffer.GetLength(); }
+  int64_t GetNextCachedData(int64_t aOffset) override {
+    ReentrantMonitorAutoEnter mon(mMonitor);
+    MOZ_ASSERT(aOffset >= 0);
+    if (uint64_t(aOffset) < mInputBuffer.GetOffset()) {
+      return mInputBuffer.GetOffset();
+    } else if (aOffset == GetLength()) {
+      return -1;
+    }
+    return aOffset;
+  }
+  int64_t GetCachedDataEnd(int64_t aOffset) override { UNIMPLEMENTED(); return -1; }
+  bool IsDataCachedToEndOfResource(int64_t aOffset) override { return false; }
+  bool IsSuspendedByCache() override { UNIMPLEMENTED(); return false; }
+  bool IsSuspended() override { UNIMPLEMENTED(); return false; }
+  nsresult ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount) override;
+  bool IsTransportSeekable() override { UNIMPLEMENTED(); return true; }
+  nsresult Open(nsIStreamListener** aStreamListener) override { UNIMPLEMENTED(); return NS_ERROR_FAILURE; }
+
+  nsresult GetCachedRanges(MediaByteRangeSet& aRanges) override
+  {
+    ReentrantMonitorAutoEnter mon(mMonitor);
+    if (mInputBuffer.GetLength()) {
+      aRanges += MediaByteRange(mInputBuffer.GetOffset(),
+                                mInputBuffer.GetLength());
+    }
+    return NS_OK;
+  }
+
+  const nsCString& GetContentType() const override { return mType; }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override
+  {
+    ReentrantMonitorAutoEnter mon(mMonitor);
+
+    size_t size = MediaResource::SizeOfExcludingThis(aMallocSizeOf);
+    size += mType.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
+    size += mInputBuffer.SizeOfExcludingThis(aMallocSizeOf);
+
+    return size;
+  }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
+  {
+    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+  bool IsExpectingMoreData() override
+  {
+    return false;
+  }
+
+  // Used by SourceBuffer.
+  void AppendData(MediaByteBuffer* aData);
+  void Ended();
+  bool IsEnded()
+  {
+    ReentrantMonitorAutoEnter mon(mMonitor);
+    return mEnded;
+  }
+  // Remove data from resource if it holds more than the threshold reduced by
+  // the given number of bytes. Returns amount evicted.
+  uint32_t EvictData(uint64_t aPlaybackOffset, int64_t aThresholdReduct,
+                     ErrorResult& aRv);
+
+  // Remove data from resource before the given offset.
+  void EvictBefore(uint64_t aOffset, ErrorResult& aRv);
+
+  // Remove all data from the resource
+  uint32_t EvictAll();
+
+  // Returns the amount of data currently retained by this resource.
+  int64_t GetSize() {
+    ReentrantMonitorAutoEnter mon(mMonitor);
+    return mInputBuffer.GetLength() - mInputBuffer.GetOffset();
+  }
+
+#if defined(DEBUG)
+  void Dump(const char* aPath) {
+    mInputBuffer.Dump(aPath);
+  }
+#endif
+
+private:
+  virtual ~SourceBufferResource();
+  nsresult ReadAtInternal(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes, bool aMayBlock);
+
+  const nsCString mType;
+
+  // Provides synchronization between SourceBuffers and InputAdapters.
+  // Protects all of the member variables below.  Read() will await a
+  // Notify() (from Seek, AppendData, Ended, or Close) when insufficient
+  // data is available in mData.
+  mutable ReentrantMonitor mMonitor;
+
+  // The buffer holding resource data.
+  ResourceQueue mInputBuffer;
+
+  uint64_t mOffset;
+  bool mClosed;
+  bool mEnded;
+};
+
+} // namespace mozilla
+
+#undef UNIMPLEMENTED
+
+#endif /* MOZILLA_SOURCEBUFFERRESOURCE_H_ */