MediaSource.h - mozsearch

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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_dom_MediaSource_h_

#define mozilla_dom_MediaSource_h_

#include "MediaSourceDecoder.h"

#include "js/RootingAPI.h"

#include "mozilla/Assertions.h"

#include "mozilla/Attributes.h"

#include "mozilla/DOMEventTargetHelper.h"

#include "mozilla/MozPromise.h"

#include "mozilla/dom/MediaSourceBinding.h"

#include "nsCOMPtr.h"

#include "nsCycleCollectionNoteChild.h"

#include "nsCycleCollectionParticipant.h"

#include "nsID.h"

#include "nsISupports.h"

#include "nscore.h"

#include "TimeUnits.h"

struct JSContext;

class JSObject;

class nsPIDOMWindowInner;

namespace mozilla {

class AbstractThread;

class ErrorResult;

template <typename T>

class AsyncEventRunner;

class MediaResult;

namespace dom {

class MediaSource;

}  // namespace dom

DDLoggedTypeName(dom::MediaSource);

namespace dom {

class GlobalObject;

class SourceBuffer;

class SourceBufferList;

template <typename T>

class Optional;

#define MOZILLA_DOM_MEDIASOURCE_IMPLEMENTATION_IID   \

  {                                                  \

    0x3839d699, 0x22c5, 0x439f, {                    \

      0x94, 0xca, 0x0e, 0x0b, 0x26, 0xf9, 0xca, 0xbf \

    }                                                \

class MediaSource final : public DOMEventTargetHelper,

                          public DecoderDoctorLifeLogger<MediaSource> {

 public:

  /** WebIDL Methods. */

  static already_AddRefed<MediaSource> Constructor(const GlobalObject& aGlobal,

                                                   ErrorResult& aRv);

  SourceBufferList* SourceBuffers();

  SourceBufferList* ActiveSourceBuffers();

  MediaSourceReadyState ReadyState();

  double Duration();

  void SetDuration(double aDuration, ErrorResult& aRv);

  already_AddRefed<SourceBuffer> AddSourceBuffer(const nsAString& aType,

                                                 ErrorResult& aRv);

  void RemoveSourceBuffer(SourceBuffer& aSourceBuffer, ErrorResult& aRv);

  void EndOfStream(const Optional<MediaSourceEndOfStreamError>& aError,

                   ErrorResult& aRv);

  void EndOfStream(const MediaResult& aError);

  void SetLiveSeekableRange(double aStart, double aEnd, ErrorResult& aRv);

  void ClearLiveSeekableRange(ErrorResult& aRv);

  static bool IsTypeSupported(const GlobalObject&, const nsAString& aType);

  // Throws on aRv if not supported.

  static void IsTypeSupported(const nsAString& aType,

                              DecoderDoctorDiagnostics* aDiagnostics,

                              ErrorResult& aRv,

                              Maybe<bool> aShouldResistFingerprinting);

  IMPL_EVENT_HANDLER(sourceopen);

  IMPL_EVENT_HANDLER(sourceended);

  IMPL_EVENT_HANDLER(sourceclose);

  /** End WebIDL Methods. */

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaSource, DOMEventTargetHelper)

  NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_DOM_MEDIASOURCE_IMPLEMENTATION_IID)

  nsPIDOMWindowInner* GetParentObject() const;

  JSObject* WrapObject(JSContext* aCx,

                       JS::Handle<JSObject*> aGivenProto) override;

  // Attach this MediaSource to Decoder aDecoder.  Returns false if already

  // attached.

  bool Attach(MediaSourceDecoder* aDecoder);

  void Detach();

  // Set mReadyState to aState and fire the required events at the MediaSource.

  void SetReadyState(MediaSourceReadyState aState);

  // Used by SourceBuffer to call CreateSubDecoder.

  MediaSourceDecoder* GetDecoder() { return mDecoder; }

  nsIPrincipal* GetPrincipal() { return mPrincipal; }

  // Returns a structure describing the state of the MediaSource internal

  // buffered data. Used for debugging purposes.

  already_AddRefed<Promise> MozDebugReaderData(ErrorResult& aRv);

  bool HasLiveSeekableRange() const { return mLiveSeekableRange.isSome(); }

  media::TimeRanges LiveSeekableRange() const {

    return mLiveSeekableRange.value();

  AbstractThread* AbstractMainThread() const { return mAbstractMainThread; }

  // Resolve all CompletionPromise pending.

  void CompletePendingTransactions();

 private:

  // SourceBuffer uses SetDuration and SourceBufferIsActive

  friend class mozilla::dom::SourceBuffer;

  ~MediaSource();

  explicit MediaSource(nsPIDOMWindowInner* aWindow);

  friend class AsyncEventRunner<MediaSource>;

  void DispatchSimpleEvent(const char* aName);

  void QueueAsyncSimpleEvent(const char* aName);

  void DurationChangeOnEndOfStream();

  void DurationChange(double aNewDuration, ErrorResult& aRv);

  // SetDuration with no checks.

  void SetDuration(const media::TimeUnit& aDuration);

  typedef MozPromise<bool, MediaResult, /* IsExclusive = */ true>

      ActiveCompletionPromise;

  // Mark SourceBuffer as active and rebuild ActiveSourceBuffers.

  // Return a MozPromise that will be resolved once all related operations are

  // completed, or can't progress any further.

  // Such as, transition of readyState from HAVE_NOTHING to HAVE_METADATA.

  RefPtr<ActiveCompletionPromise> SourceBufferIsActive(

      SourceBuffer* aSourceBuffer);

  RefPtr<SourceBufferList> mSourceBuffers;

  RefPtr<SourceBufferList> mActiveSourceBuffers;

  RefPtr<MediaSourceDecoder> mDecoder;

  // Ensures the media element remains alive to dispatch progress and

  // durationchanged events.

  RefPtr<HTMLMediaElement> mMediaElement;

  RefPtr<nsIPrincipal> mPrincipal;

  const RefPtr<AbstractThread> mAbstractMainThread;

  MediaSourceReadyState mReadyState;

  Maybe<media::TimeRanges> mLiveSeekableRange;

  nsTArray<MozPromiseHolder<ActiveCompletionPromise>> mCompletionPromises;

};

NS_DEFINE_STATIC_IID_ACCESSOR(MediaSource,

                              MOZILLA_DOM_MEDIASOURCE_IMPLEMENTATION_IID)

}  // namespace dom

}  // namespace mozilla

#endif /* mozilla_dom_MediaSource_h_ */