1 files changed, 157 insertions, 0 deletions
diff --git a/dom/media/mediasource/SourceBufferAttributes.h b/dom/media/mediasource/SourceBufferAttributes.h
new file mode 100644
index 000000000..0af80a4fe
--- /dev/null
+++ b/dom/media/mediasource/SourceBufferAttributes.h
@@ -0,0 +1,157 @@
+/* -*- 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_ */