1 files changed, 116 insertions, 0 deletions
diff --git a/dom/media/mediasource/SourceBufferAttributes.h b/dom/media/mediasource/SourceBufferAttributes.h
new file mode 100644
index 0000000000..f15845b8a9
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+++ b/dom/media/mediasource/SourceBufferAttributes.h
@@ -0,0 +1,116 @@
+/* -*- 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_SourceBufferAttributes_h_
+#define mozilla_SourceBufferAttributes_h_
+
+#include "TimeUnits.h"
+#include "mozilla/dom/SourceBufferBinding.h"
+#include "mozilla/Maybe.h"
+
+namespace mozilla {
+
+class SourceBufferAttributes {
+ public:
+  // Current state as per Segment Parser Loop Algorithm
+  // http://w3c.github.io/media-source/index.html#sourcebuffer-segment-parser-loop
+  enum class AppendState {
+    WAITING_FOR_SEGMENT,
+    PARSING_INIT_SEGMENT,
+    PARSING_MEDIA_SEGMENT,
+  };
+
+  explicit SourceBufferAttributes(bool aGenerateTimestamp)
+      : mGenerateTimestamps(aGenerateTimestamp),
+        mAppendWindowStart(0),
+        mAppendWindowEnd(PositiveInfinity<double>()),
+        mAppendMode(dom::SourceBufferAppendMode::Segments),
+        mApparentTimestampOffset(0),
+        mAppendState(AppendState::WAITING_FOR_SEGMENT) {}
+
+  SourceBufferAttributes(const SourceBufferAttributes& aOther) = default;
+
+  double GetAppendWindowStart() const { return mAppendWindowStart; }
+
+  double GetAppendWindowEnd() const { return mAppendWindowEnd; }
+
+  void SetAppendWindowStart(double aWindowStart) {
+    mAppendWindowStart = aWindowStart;
+  }
+
+  void SetAppendWindowEnd(double aWindowEnd) { mAppendWindowEnd = aWindowEnd; }
+
+  double GetApparentTimestampOffset() const { return mApparentTimestampOffset; }
+
+  void SetApparentTimestampOffset(double aTimestampOffset) {
+    mApparentTimestampOffset = aTimestampOffset;
+    mTimestampOffset = media::TimeUnit::FromSeconds(aTimestampOffset);
+  }
+
+  media::TimeUnit GetTimestampOffset() const { return mTimestampOffset; }
+
+  void SetTimestampOffset(const media::TimeUnit& aTimestampOffset) {
+    mTimestampOffset = aTimestampOffset;
+    mApparentTimestampOffset = aTimestampOffset.ToSeconds();
+  }
+
+  dom::SourceBufferAppendMode GetAppendMode() const { return mAppendMode; }
+
+  void SetAppendMode(dom::SourceBufferAppendMode aAppendMode) {
+    mAppendMode = aAppendMode;
+  }
+
+  void SetGroupStartTimestamp(const media::TimeUnit& aGroupStartTimestamp) {
+    mGroupStartTimestamp = Some(aGroupStartTimestamp);
+  }
+
+  media::TimeUnit GetGroupStartTimestamp() const {
+    return mGroupStartTimestamp.ref();
+  }
+
+  bool HaveGroupStartTimestamp() const { return mGroupStartTimestamp.isSome(); }
+
+  void ResetGroupStartTimestamp() { mGroupStartTimestamp.reset(); }
+
+  void RestartGroupStartTimestamp() {
+    mGroupStartTimestamp = Some(mGroupEndTimestamp);
+  }
+
+  media::TimeUnit GetGroupEndTimestamp() const { return mGroupEndTimestamp; }
+
+  void SetGroupEndTimestamp(const media::TimeUnit& aGroupEndTimestamp) {
+    mGroupEndTimestamp = aGroupEndTimestamp;
+  }
+
+  AppendState GetAppendState() const { return mAppendState; }
+
+  void SetAppendState(AppendState aState) { mAppendState = aState; }
+
+  // mGenerateTimestamp isn't mutable once the source buffer has been
+  // constructed
+  bool mGenerateTimestamps;
+
+  SourceBufferAttributes& operator=(const SourceBufferAttributes& aOther) =
+      default;
+
+ private:
+  SourceBufferAttributes() = delete;
+
+  double mAppendWindowStart;
+  double mAppendWindowEnd;
+  dom::SourceBufferAppendMode mAppendMode;
+  double mApparentTimestampOffset;
+  media::TimeUnit mTimestampOffset;
+  Maybe<media::TimeUnit> mGroupStartTimestamp;
+  media::TimeUnit mGroupEndTimestamp;
+  // The current append state as per
+  // https://w3c.github.io/media-source/#sourcebuffer-append-state
+  AppendState mAppendState;
+};
+
+}  // end namespace mozilla
+
+#endif /* mozilla_SourceBufferAttributes_h_ */