tor-browser

The Tor Browser
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NullDecoderModule.cpp (2296B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "DummyMediaDataDecoder.h"
      8 #include "ImageContainer.h"
      9 #include "mozilla/StaticPrefs_media.h"
     10 
     11 namespace mozilla {
     12 
     13 class NullVideoDataCreator : public DummyDataCreator {
     14 public:
     15  NullVideoDataCreator() = default;
     16 
     17  already_AddRefed<MediaData> Create(MediaRawData* aSample) override {
     18    // Create a dummy VideoData with an empty image. This gives us something to
     19    // send to media streams if necessary.
     20    RefPtr<layers::PlanarYCbCrImage> image =
     21        new layers::RecyclingPlanarYCbCrImage(new layers::BufferRecycleBin());
     22    return VideoData::CreateFromImage(gfx::IntSize(), aSample->mOffset,
     23                                      aSample->mTime, aSample->mDuration, image,
     24                                      aSample->mKeyframe, aSample->mTimecode);
     25  }
     26 };
     27 
     28 class NullDecoderModule : public PlatformDecoderModule {
     29 public:
     30  const char* Name() const override { return "Null"; }
     31  // Decode thread.
     32  already_AddRefed<MediaDataDecoder> CreateVideoDecoder(
     33      const CreateDecoderParams& aParams) override {
     34    if (StaticPrefs::media_test_null_decoder_creation_failure()) {
     35      return nullptr;
     36    }
     37    UniquePtr<DummyDataCreator> creator = MakeUnique<NullVideoDataCreator>();
     38    RefPtr<MediaDataDecoder> decoder = new DummyMediaDataDecoder(
     39        std::move(creator), "null media data decoder"_ns, aParams);
     40    return decoder.forget();
     41  }
     42 
     43  // Decode thread.
     44  already_AddRefed<MediaDataDecoder> CreateAudioDecoder(
     45      const CreateDecoderParams& aParams) override {
     46    MOZ_ASSERT(false, "Audio decoders are unsupported.");
     47    return nullptr;
     48  }
     49 
     50  media::DecodeSupportSet SupportsMimeType(
     51      const nsACString& aMimeType,
     52      DecoderDoctorDiagnostics* aDiagnostics) const override {
     53    return media::DecodeSupport::SoftwareDecode;
     54  }
     55 };
     56 
     57 already_AddRefed<PlatformDecoderModule> CreateNullDecoderModule() {
     58  RefPtr<PlatformDecoderModule> pdm = new NullDecoderModule();
     59  return pdm.forget();
     60 }
     61 
     62 }  // namespace mozilla