image/decoders/nsJXLDecoder.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   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 #ifndef mozilla_image_decoders_nsJXLDecoder_h
   8 #define mozilla_image_decoders_nsJXLDecoder_h
   9
  10 #include "Decoder.h"
  11 #include "mp4parse.h"
  12 #include "SurfacePipe.h"
  13
  14 #include "jxl/decode_cxx.h"
  15 #include "jxl/thread_parallel_runner_cxx.h"
  16
  17 #include "mozilla/Telemetry.h"
  18
  19 namespace mozilla::image {
  20 class RasterImage;
  21
  22 class nsJXLDecoder final : public Decoder {
  23  public:
  24   virtual ~nsJXLDecoder();
  25
  26   DecoderType GetType() const override { return DecoderType::JXL; }
  27
  28  protected:
  29   LexerResult DoDecode(SourceBufferIterator& aIterator,
  30                        IResumable* aOnResume) override;
  31
  32  private:
  33   friend class DecoderFactory;
  34
  35   // Decoders should only be instantiated via DecoderFactory.
  36   explicit nsJXLDecoder(RasterImage* aImage);
  37
  38   size_t PreferredThreadCount();
  39
  40   enum class State { JXL_DATA, FINISHED_JXL_DATA };
  41
  42   LexerTransition<State> ReadJXLData(const char* aData, size_t aLength);
  43   LexerTransition<State> FinishedJXLData();
  44
  45   StreamingLexer<State> mLexer;
  46   JxlDecoderPtr mDecoder;
  47   JxlThreadParallelRunnerPtr mParallelRunner;
  48   Vector<uint8_t> mBuffer;
  49   Vector<uint8_t> mOutBuffer;
  50   JxlBasicInfo mInfo{};
  51 };
  52
  53 }  // namespace mozilla::image
  54
  55 #endif  // mozilla_image_decoders_nsJXLDecoder_h