1 files changed, 126 insertions, 0 deletions
diff --git a/dom/media/mediasource/SourceBufferTask.h b/dom/media/mediasource/SourceBufferTask.h
new file mode 100644
index 0000000000..34ccba1426
--- /dev/null
+++ b/dom/media/mediasource/SourceBufferTask.h
@@ -0,0 +1,126 @@
+/* -*- 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_SOURCEBUFFERTASK_H_
+#define MOZILLA_SOURCEBUFFERTASK_H_
+
+#include "mozilla/MozPromise.h"
+#include "SourceBufferAttributes.h"
+#include "TimeUnits.h"
+#include "MediaResult.h"
+
+#include <utility>
+
+namespace mozilla {
+
+class SourceBufferTask {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SourceBufferTask);
+  enum class Type {
+    AppendBuffer,
+    Abort,
+    Reset,
+    RangeRemoval,
+    EvictData,
+    Detach,
+    ChangeType
+  };
+
+  typedef std::pair<bool, SourceBufferAttributes> AppendBufferResult;
+  typedef MozPromise<AppendBufferResult, MediaResult, /* IsExclusive = */ true>
+      AppendPromise;
+  typedef MozPromise<bool, nsresult, /* IsExclusive = */ true>
+      RangeRemovalPromise;
+
+  virtual Type GetType() const = 0;
+  virtual const char* GetTypeName() const = 0;
+
+  template <typename ReturnType>
+  ReturnType* As() {
+    MOZ_ASSERT(this->GetType() == ReturnType::sType);
+    return static_cast<ReturnType*>(this);
+  }
+
+ protected:
+  virtual ~SourceBufferTask() = default;
+};
+
+class AppendBufferTask : public SourceBufferTask {
+ public:
+  AppendBufferTask(already_AddRefed<MediaByteBuffer> aData,
+                   const SourceBufferAttributes& aAttributes)
+      : mBuffer(aData), mAttributes(aAttributes) {}
+
+  static const Type sType = Type::AppendBuffer;
+  Type GetType() const override { return Type::AppendBuffer; }
+  const char* GetTypeName() const override { return "AppendBuffer"; }
+
+  RefPtr<MediaByteBuffer> mBuffer;
+  SourceBufferAttributes mAttributes;
+  MozPromiseHolder<AppendPromise> mPromise;
+};
+
+class AbortTask : public SourceBufferTask {
+ public:
+  static const Type sType = Type::Abort;
+  Type GetType() const override { return Type::Abort; }
+  const char* GetTypeName() const override { return "Abort"; }
+};
+
+class ResetTask : public SourceBufferTask {
+ public:
+  static const Type sType = Type::Reset;
+  Type GetType() const override { return Type::Reset; }
+  const char* GetTypeName() const override { return "Reset"; }
+};
+
+class RangeRemovalTask : public SourceBufferTask {
+ public:
+  explicit RangeRemovalTask(const media::TimeInterval& aRange)
+      : mRange(aRange) {}
+
+  static const Type sType = Type::RangeRemoval;
+  Type GetType() const override { return Type::RangeRemoval; }
+  const char* GetTypeName() const override { return "RangeRemoval"; }
+
+  media::TimeInterval mRange;
+  MozPromiseHolder<RangeRemovalPromise> mPromise;
+};
+
+class EvictDataTask : public SourceBufferTask {
+ public:
+  EvictDataTask(const media::TimeUnit& aPlaybackTime, int64_t aSizetoEvict)
+      : mPlaybackTime(aPlaybackTime), mSizeToEvict(aSizetoEvict) {}
+
+  static const Type sType = Type::EvictData;
+  Type GetType() const override { return Type::EvictData; }
+  const char* GetTypeName() const override { return "EvictData"; }
+
+  media::TimeUnit mPlaybackTime;
+  int64_t mSizeToEvict;
+};
+
+class DetachTask : public SourceBufferTask {
+ public:
+  static const Type sType = Type::Detach;
+  Type GetType() const override { return Type::Detach; }
+  const char* GetTypeName() const override { return "Detach"; }
+};
+
+class ChangeTypeTask : public SourceBufferTask {
+ public:
+  explicit ChangeTypeTask(const MediaContainerType& aType) : mType(aType) {}
+
+  static const Type sType = Type::ChangeType;
+  Type GetType() const override { return Type::ChangeType; }
+  const char* GetTypeName() const override { return "ChangeType"; }
+
+  const MediaContainerType mType;
+};
+
+}  // namespace mozilla
+
+#endif