/* -*- 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 "mozilla/Pair.h"

#include "SourceBufferAttributes.h"

#include "TimeUnits.h"

#include "MediaResult.h"

namespace mozilla {

class SourceBufferTask {

public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SourceBufferTask);

  enum class Type  {

    AppendBuffer,

    Abort,

    Reset,

    RangeRemoval,

    EvictData,

    Detach,

    ChangeType

  };

  typedef 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);

  }

Unexecuted instantiation: mozilla::AppendBufferTask* mozilla::SourceBufferTask::As<mozilla::AppendBufferTask>()

Unexecuted instantiation: mozilla::RangeRemovalTask* mozilla::SourceBufferTask::As<mozilla::RangeRemovalTask>()

Unexecuted instantiation: mozilla::EvictDataTask* mozilla::SourceBufferTask::As<mozilla::EvictDataTask>()

Unexecuted instantiation: mozilla::ChangeTypeTask* mozilla::SourceBufferTask::As<mozilla::ChangeTypeTask>()

protected:

  virtual ~SourceBufferTask() {}

};

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;

};

} // end mozilla namespace

#endif