DecoderTraits.h - mozsearch

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* 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 DecoderTraits_h_

#define DecoderTraits_h_

#include "mozilla/UniquePtr.h"

#include "nsStringFwd.h"

#include "nsTArray.h"

namespace mozilla {

class DecoderDoctorDiagnostics;

class MediaContainerType;

class MediaDataDemuxer;

struct MediaFormatReaderInit;

class MediaFormatReader;

class MediaResource;

class TrackInfo;

enum CanPlayStatus { CANPLAY_NO, CANPLAY_MAYBE, CANPLAY_YES };

class DecoderTraits {

 public:

  // Returns the CanPlayStatus indicating if we can handle this container type.

  static CanPlayStatus CanHandleContainerType(

      const MediaContainerType& aContainerType,

      DecoderDoctorDiagnostics* aDiagnostics);

  // Returns true if we should handle this MIME type when it appears

  // as an <object> or as a toplevel page. If, in practice, our support

  // for the type is more limited than appears in the wild, we should return

  // false here even if CanHandleMediaType would return true.

  static bool ShouldHandleMediaType(const char* aMIMEType,

                                    DecoderDoctorDiagnostics* aDiagnostics);

  // Create a demuxer for the given MIME type aType.  Returns null if we

  // were unable to create the demuxer.

  static already_AddRefed<MediaDataDemuxer> CreateDemuxer(

      const MediaContainerType& aType, MediaResource* aResource);

  // Create a reader for thew given MIME type aType. Returns null

  // if we were unable to create the reader.

  static MediaFormatReader* CreateReader(const MediaContainerType& aType,

                                         MediaFormatReaderInit& aInit);

  // Returns true if MIME type aType is supported in video documents,

  // or false otherwise. Not all platforms support all MIME types, and

  // vice versa.

  static bool IsSupportedInVideoDocument(const nsACString& aType);

  // Returns true if aType is MIME type of hls.

  static bool IsHttpLiveStreamingType(const MediaContainerType& aType);

  // Returns an array of all TrackInfo objects described by this type.

  static nsTArray<UniquePtr<TrackInfo>> GetTracksInfo(

      const MediaContainerType& aType);

};

}  // namespace mozilla

#endif