SourceBufferTask.h

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/* -*- 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