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

#include "ImageLogging.h"  // Must appear first

#include "nsAVIFDecoder.h"

#include "aom/aomdx.h"

#include "DAV1DDecoder.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/Types.h"
#include "YCbCrUtils.h"
#include "libyuv.h"

#include "SurfacePipeFactory.h"

#include "mozilla/Telemetry.h"
#include "mozilla/TelemetryComms.h"

using namespace mozilla::gfx;

namespace mozilla {

namespace image {

using Telemetry::LABELS_AVIF_A1LX;
using Telemetry::LABELS_AVIF_A1OP;
using Telemetry::LABELS_AVIF_ALPHA;
using Telemetry::LABELS_AVIF_AOM_DECODE_ERROR;
using Telemetry::LABELS_AVIF_BIT_DEPTH;
using Telemetry::LABELS_AVIF_CICP_CP;
using Telemetry::LABELS_AVIF_CICP_MC;
using Telemetry::LABELS_AVIF_CICP_TC;
using Telemetry::LABELS_AVIF_CLAP;
using Telemetry::LABELS_AVIF_COLR;
using Telemetry::LABELS_AVIF_DECODE_RESULT;
using Telemetry::LABELS_AVIF_DECODER;
using Telemetry::LABELS_AVIF_GRID;
using Telemetry::LABELS_AVIF_IPRO;
using Telemetry::LABELS_AVIF_ISPE;
using Telemetry::LABELS_AVIF_LSEL;
using Telemetry::LABELS_AVIF_MAJOR_BRAND;
using Telemetry::LABELS_AVIF_PASP;
using Telemetry::LABELS_AVIF_PIXI;
using Telemetry::LABELS_AVIF_SEQUENCE;
using Telemetry::LABELS_AVIF_YUV_COLOR_SPACE;

static LazyLogModule sAVIFLog("AVIFDecoder");

static const LABELS_AVIF_BIT_DEPTH gColorDepthLabel[] = {
    LABELS_AVIF_BIT_DEPTH::color_8, LABELS_AVIF_BIT_DEPTH::color_10,
    LABELS_AVIF_BIT_DEPTH::color_12, LABELS_AVIF_BIT_DEPTH::color_16};

static const LABELS_AVIF_YUV_COLOR_SPACE gColorSpaceLabel[] = {
    LABELS_AVIF_YUV_COLOR_SPACE::BT601, LABELS_AVIF_YUV_COLOR_SPACE::BT709,
    LABELS_AVIF_YUV_COLOR_SPACE::BT2020, LABELS_AVIF_YUV_COLOR_SPACE::identity};

static MaybeIntSize GetImageSize(const Mp4parseAvifImage& image) {
  // Note this does not take cropping via CleanAperture (clap) into account
  const struct Mp4parseImageSpatialExtents* ispe = image.spatial_extents;

  if (ispe) {
    // Decoder::PostSize takes int32_t, but ispe contains uint32_t
    CheckedInt<int32_t> width = ispe->image_width;
    CheckedInt<int32_t> height = ispe->image_height;

    if (width.isValid() && height.isValid()) {
      return Some(IntSize{width.value(), height.value()});
    }
  }

  return Nothing();
}

// Translate the number of bits per channel into a single ColorDepth.
// Return Nothing if the number of bits per channel is not uniform.
static Maybe<uint8_t> BitsPerChannelToBitDepth(
    const Mp4parseByteData& bits_per_channel) {
  if (bits_per_channel.length == 0) {
    return Nothing();
  }

  for (uintptr_t i = 1; i < bits_per_channel.length; ++i) {
    if (bits_per_channel.data[i] != bits_per_channel.data[0]) {
      // log mismatch
      return Nothing();
    }
  }

  return Some(bits_per_channel.data[0]);
}

static void RecordPixiTelemetry(Maybe<uint8_t>& pixiBitDepth,
                                uint8_t aBitstreamBitDepth,
                                const char* aItemName) {
  if (pixiBitDepth.isNothing()) {
    AccumulateCategorical(LABELS_AVIF_PIXI::absent);
  } else if (pixiBitDepth == Some(aBitstreamBitDepth)) {
    AccumulateCategorical(LABELS_AVIF_PIXI::valid);
  } else {
    MOZ_ASSERT(pixiBitDepth.isSome());
    MOZ_LOG(sAVIFLog, LogLevel::Error,
            ("%s item pixi bit depth (%hhu) doesn't match "
             "bitstream (%hhu)",
             aItemName, *pixiBitDepth, aBitstreamBitDepth));
    AccumulateCategorical(LABELS_AVIF_PIXI::bitstream_mismatch);
  }
}

// Translate the MIAF/HEIF-based orientation transforms (imir, irot) into
// ImageLib's representation. Note that the interpretation of imir was reversed
// Between HEIF (ISO 23008-12:2017) and ISO/IEC 23008-12:2017/DAmd 2. This is
// handled by mp4parse. See mp4parse::read_imir for details.
Orientation GetImageOrientation(const Mp4parseAvifImage& image) {
  // Per MIAF (ISO/IEC 23000-22:2019) § 7.3.6.7
  //   These properties, if used, shall be indicated to be applied in the
  //   following order: clean aperture first, then rotation, then mirror.
  // The Orientation type does the same order, but opposite rotation direction

  const Mp4parseIrot heifRot = image.image_rotation;
  const Mp4parseImir* heifMir = image.image_mirror;
  Angle mozRot;
  Flip mozFlip;

  if (!heifMir) {  // No mirroring
    mozFlip = Flip::Unflipped;

    switch (heifRot) {
      case MP4PARSE_IROT_D0:
        // ⥠ UPWARDS HARPOON WITH BARB LEFT FROM BAR
        mozRot = Angle::D0;
        break;
      case MP4PARSE_IROT_D90:
        // ⥞ LEFTWARDS HARPOON WITH BARB DOWN FROM BAR
        mozRot = Angle::D270;
        break;
      case MP4PARSE_IROT_D180:
        // ⥝ DOWNWARDS HARPOON WITH BARB RIGHT FROM BAR
        mozRot = Angle::D180;
        break;
      case MP4PARSE_IROT_D270:
        // ⥛  RIGHTWARDS HARPOON WITH BARB UP FROM BAR
        mozRot = Angle::D90;
        break;
      default:
        MOZ_ASSERT_UNREACHABLE();
    }
  } else {
    MOZ_ASSERT(heifMir);
    mozFlip = Flip::Horizontal;

    enum class HeifFlippedOrientation : uint8_t {
      IROT_D0_IMIR_V = (MP4PARSE_IROT_D0 << 1) | MP4PARSE_IMIR_LEFT_RIGHT,
      IROT_D0_IMIR_H = (MP4PARSE_IROT_D0 << 1) | MP4PARSE_IMIR_TOP_BOTTOM,
      IROT_D90_IMIR_V = (MP4PARSE_IROT_D90 << 1) | MP4PARSE_IMIR_LEFT_RIGHT,
      IROT_D90_IMIR_H = (MP4PARSE_IROT_D90 << 1) | MP4PARSE_IMIR_TOP_BOTTOM,
      IROT_D180_IMIR_V = (MP4PARSE_IROT_D180 << 1) | MP4PARSE_IMIR_LEFT_RIGHT,
      IROT_D180_IMIR_H = (MP4PARSE_IROT_D180 << 1) | MP4PARSE_IMIR_TOP_BOTTOM,
      IROT_D270_IMIR_V = (MP4PARSE_IROT_D270 << 1) | MP4PARSE_IMIR_LEFT_RIGHT,
      IROT_D270_IMIR_H = (MP4PARSE_IROT_D270 << 1) | MP4PARSE_IMIR_TOP_BOTTOM,
    };

    HeifFlippedOrientation heifO =
        HeifFlippedOrientation((heifRot << 1) | *heifMir);

    switch (heifO) {
      case HeifFlippedOrientation::IROT_D0_IMIR_V:
      case HeifFlippedOrientation::IROT_D180_IMIR_H:
        // ⥜ UPWARDS HARPOON WITH BARB RIGHT FROM BAR
        mozRot = Angle::D0;
        break;
      case HeifFlippedOrientation::IROT_D270_IMIR_V:
      case HeifFlippedOrientation::IROT_D90_IMIR_H:
        // ⥚ LEFTWARDS HARPOON WITH BARB UP FROM BAR
        mozRot = Angle::D90;
        break;
      case HeifFlippedOrientation::IROT_D180_IMIR_V:
      case HeifFlippedOrientation::IROT_D0_IMIR_H:
        // ⥡ DOWNWARDS HARPOON WITH BARB LEFT FROM BAR
        mozRot = Angle::D180;
        break;
      case HeifFlippedOrientation::IROT_D90_IMIR_V:
      case HeifFlippedOrientation::IROT_D270_IMIR_H:
        // ⥟ RIGHTWARDS HARPOON WITH BARB DOWN FROM BAR
        mozRot = Angle::D270;
        break;
      default:
        MOZ_ASSERT_UNREACHABLE();
    }
  }

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("GetImageOrientation: (rot%d, imir(%s)) -> (Angle%d, "
           "Flip%d)",
           static_cast<int>(heifRot),
           heifMir ? (*heifMir == MP4PARSE_IMIR_LEFT_RIGHT ? "left-right"
                                                           : "top-bottom")
                   : "none",
           static_cast<int>(mozRot), static_cast<int>(mozFlip)));
  return Orientation{mozRot, mozFlip};
}

class AVIFParser {
 public:
  static Mp4parseStatus Create(const Mp4parseIo* aIo,
                               UniquePtr<AVIFParser>& aParserOut) {
    MOZ_ASSERT(aIo);
    MOZ_ASSERT(!aParserOut);

    UniquePtr<AVIFParser> p(new AVIFParser(aIo));
    Mp4parseStatus status = p->Init();

    if (status == MP4PARSE_STATUS_OK) {
      MOZ_ASSERT(p->mParser);
      aParserOut = std::move(p);
    }

    return status;
  }

  ~AVIFParser() {
    MOZ_LOG(sAVIFLog, LogLevel::Debug, ("Destroy AVIFParser=%p", this));
  }

  Mp4parseAvifImage* GetImage() {
    MOZ_ASSERT(mParser);

    if (mAvifImage.isNothing()) {
      mAvifImage.emplace();
      Mp4parseStatus status =
          mp4parse_avif_get_image(mParser.get(), mAvifImage.ptr());
      MOZ_LOG(sAVIFLog, LogLevel::Debug,
              ("[this=%p] mp4parse_avif_get_image -> %d; primary_item length: "
               "%zu, alpha_item length: %zu",
               this, status, mAvifImage->primary_image.coded_data.length,
               mAvifImage->alpha_image.coded_data.length));
      if (status != MP4PARSE_STATUS_OK) {
        mAvifImage.reset();
        return nullptr;
      }
    }
    return mAvifImage.ptr();
  }

 private:
  explicit AVIFParser(const Mp4parseIo* aIo) : mIo(aIo) {
    MOZ_ASSERT(mIo);
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("Create AVIFParser=%p, image.avif.compliance_strictness: %d", this,
             StaticPrefs::image_avif_compliance_strictness()));
  }

  Mp4parseStatus Init() {
    MOZ_ASSERT(!mParser);

    Mp4parseAvifParser* parser = nullptr;
    Mp4parseStatus status =
        mp4parse_avif_new(mIo,
                          static_cast<enum Mp4parseStrictness>(
                              StaticPrefs::image_avif_compliance_strictness()),
                          &parser);
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] mp4parse_avif_new status: %d", this, status));
    if (status == MP4PARSE_STATUS_OK) {
      mParser.reset(parser);
    }
    return status;
  }

  struct FreeAvifParser {
    void operator()(Mp4parseAvifParser* aPtr) { mp4parse_avif_free(aPtr); }
  };

  const Mp4parseIo* mIo;
  UniquePtr<Mp4parseAvifParser, FreeAvifParser> mParser;
  Maybe<Mp4parseAvifImage> mAvifImage;
};

// CICP values (either from the BMFF container or the AV1 sequence header) are
// used to create the colorspace transform. CICP::MatrixCoefficients is only
// stored for the sake of telemetry, since the relevant information for YUV ->
// RGB conversion is stored in mYUVColorSpace.
//
// There are three potential sources of color information for an AVIF:
// 1. ICC profile via a ColourInformationBox (colr) defined in [ISOBMFF]
//    § 12.1.5 "Colour information" and [MIAF] § 7.3.6.4 "Colour information
//    property"
// 2. NCLX (AKA CICP see [ITU-T H.273]) values in the same ColourInformationBox
//    which can have an ICC profile or NCLX values, not both).
// 3. NCLX values in the AV1 bitstream
//
// The 'colr' box is optional, but there are always CICP values in the AV1
// bitstream, so it is possible to have both. Per ISOBMFF § 12.1.5.1
// > If colour information is supplied in both this box, and also in the
// > video bitstream, this box takes precedence, and over-rides the
// > information in the bitstream.
//
// If present, the ICC profile takes precedence over CICP values, but only
// specifies the color space, not the matrix coefficients necessary to convert
// YCbCr data (as most AVIF are encoded) to RGB. The matrix coefficients are
// always derived from the CICP values for matrix_coefficients (and potentially
// colour_primaries, but in that case only the CICP values for colour_primaries
// will be used, not anything harvested from the ICC profile).
//
// If there is no ICC profile, the color space transform will be based on the
// CICP values either from the 'colr' box, or if absent/unspecified, the
// decoded AV1 sequence header.
//
// For values that are 2 (meaning unspecified) after trying both, the
// fallback values are:
// - CP:  1 (BT.709/sRGB)
// - TC: 13 (sRGB)
// - MC:  6 (BT.601)
// - Range: Full
//
// Additional details here:
// <https://github.com/AOMediaCodec/libavif/wiki/CICP#unspecified>. Note
// that this contradicts the current version of [MIAF] § 7.3.6.4 which
// specifies MC=1 (BT.709). This is revised in [MIAF DAMD2] and confirmed by
// <https://github.com/AOMediaCodec/av1-avif/issues/77#issuecomment-676526097>
//
// The precedence for applying the various values and defaults in the event
// no valid values are found are managed by the following functions.
//
// References:
// [ISOBMFF]: ISO/IEC 14496-12:2020 <https://www.iso.org/standard/74428.html>
// [MIAF]: ISO/IEC 23000-22:2019 <https://www.iso.org/standard/74417.html>
// [MIAF DAMD2]: ISO/IEC 23000-22:2019/FDAmd 2
// <https://www.iso.org/standard/81634.html>
// [ITU-T H.273]: Rec. ITU-T H.273 (12/2016)
//     <https://www.itu.int/rec/T-REC-H.273-201612-I/en>
struct AVIFDecodedData : layers::PlanarYCbCrData {
  CICP::ColourPrimaries mColourPrimaries = CICP::CP_UNSPECIFIED;
  CICP::TransferCharacteristics mTransferCharacteristics = CICP::TC_UNSPECIFIED;
  CICP::MatrixCoefficients mMatrixCoefficients = CICP::MC_UNSPECIFIED;

  void SetCicpValues(
      const Mp4parseNclxColourInformation* aNclx,
      const CICP::ColourPrimaries aAv1ColourPrimaries,
      const CICP::TransferCharacteristics aAv1TransferCharacteristics,
      const CICP::MatrixCoefficients aAv1MatrixCoefficients);
};

// The gfx::YUVColorSpace value is only used in the conversion from YUV -> RGB.
// Typically this comes directly from the CICP matrix_coefficients value, but
// certain values require additionally considering the colour_primaries value.
// See `gfxUtils::CicpToColorSpace` for details. We return a gfx::YUVColorSpace
// rather than CICP::MatrixCoefficients, since that's what
// `gfx::ConvertYCbCrATo[A]RGB` uses. `aBitstreamColorSpaceFunc` abstracts the
// fact that different decoder libraries require different methods for
// extracting the CICP values from the AV1 bitstream and we don't want to do
// that work unnecessarily because in addition to wasted effort, it would make
// the logging more confusing.
template <typename F>
static gfx::YUVColorSpace GetAVIFColorSpace(
    const Mp4parseNclxColourInformation* aNclx, F&& aBitstreamColorSpaceFunc) {
  return ToMaybe(aNclx)
      .map([=](const auto& nclx) {
        return gfxUtils::CicpToColorSpace(
            static_cast<CICP::MatrixCoefficients>(nclx.matrix_coefficients),
            static_cast<CICP::ColourPrimaries>(nclx.colour_primaries),
            sAVIFLog);
      })
      .valueOrFrom(aBitstreamColorSpaceFunc)
      .valueOr(gfx::YUVColorSpace::BT601);
}

static gfx::ColorRange GetAVIFColorRange(
    const Mp4parseNclxColourInformation* aNclx,
    const gfx::ColorRange av1ColorRange) {
  return ToMaybe(aNclx)
      .map([=](const auto& nclx) {
        return aNclx->full_range_flag ? gfx::ColorRange::FULL
                                      : gfx::ColorRange::LIMITED;
      })
      .valueOr(av1ColorRange);
}

void AVIFDecodedData::SetCicpValues(
    const Mp4parseNclxColourInformation* aNclx,
    const CICP::ColourPrimaries aAv1ColourPrimaries,
    const CICP::TransferCharacteristics aAv1TransferCharacteristics,
    const CICP::MatrixCoefficients aAv1MatrixCoefficients) {
  auto cp = CICP::ColourPrimaries::CP_UNSPECIFIED;
  auto tc = CICP::TransferCharacteristics::TC_UNSPECIFIED;
  auto mc = CICP::MatrixCoefficients::MC_UNSPECIFIED;

  if (aNclx) {
    cp = static_cast<CICP::ColourPrimaries>(aNclx->colour_primaries);
    tc = static_cast<CICP::TransferCharacteristics>(
        aNclx->transfer_characteristics);
    mc = static_cast<CICP::MatrixCoefficients>(aNclx->matrix_coefficients);
  }

  if (cp == CICP::ColourPrimaries::CP_UNSPECIFIED) {
    if (aAv1ColourPrimaries != CICP::ColourPrimaries::CP_UNSPECIFIED) {
      cp = aAv1ColourPrimaries;
      MOZ_LOG(sAVIFLog, LogLevel::Info,
              ("Unspecified colour_primaries value specified in colr box, "
               "using AV1 sequence header (%hhu)",
               cp));
    } else {
      cp = CICP::ColourPrimaries::CP_BT709;
      MOZ_LOG(sAVIFLog, LogLevel::Warning,
              ("Unspecified colour_primaries value specified in colr box "
               "or AV1 sequence header, using fallback value (%hhu)",
               cp));
    }
  } else if (cp != aAv1ColourPrimaries) {
    MOZ_LOG(sAVIFLog, LogLevel::Warning,
            ("colour_primaries mismatch: colr box = %hhu, AV1 "
             "sequence header = %hhu, using colr box",
             cp, aAv1ColourPrimaries));
  }

  if (tc == CICP::TransferCharacteristics::TC_UNSPECIFIED) {
    if (aAv1TransferCharacteristics !=
        CICP::TransferCharacteristics::TC_UNSPECIFIED) {
      tc = aAv1TransferCharacteristics;
      MOZ_LOG(sAVIFLog, LogLevel::Info,
              ("Unspecified transfer_characteristics value specified in "
               "colr box, using AV1 sequence header (%hhu)",
               tc));
    } else {
      tc = CICP::TransferCharacteristics::TC_SRGB;
      MOZ_LOG(sAVIFLog, LogLevel::Warning,
              ("Unspecified transfer_characteristics value specified in "
               "colr box or AV1 sequence header, using fallback value (%hhu)",
               tc));
    }
  } else if (tc != aAv1TransferCharacteristics) {
    MOZ_LOG(sAVIFLog, LogLevel::Warning,
            ("transfer_characteristics mismatch: colr box = %hhu, "
             "AV1 sequence header = %hhu, using colr box",
             tc, aAv1TransferCharacteristics));
  }

  if (mc == CICP::MatrixCoefficients::MC_UNSPECIFIED) {
    if (aAv1MatrixCoefficients != CICP::MatrixCoefficients::MC_UNSPECIFIED) {
      mc = aAv1MatrixCoefficients;
      MOZ_LOG(sAVIFLog, LogLevel::Info,
              ("Unspecified matrix_coefficients value specified in "
               "colr box, using AV1 sequence header (%hhu)",
               mc));
    } else {
      mc = CICP::MatrixCoefficients::MC_BT601;
      MOZ_LOG(sAVIFLog, LogLevel::Warning,
              ("Unspecified matrix_coefficients value specified in "
               "colr box or AV1 sequence header, using fallback value (%hhu)",
               mc));
    }
  } else if (mc != aAv1MatrixCoefficients) {
    MOZ_LOG(sAVIFLog, LogLevel::Warning,
            ("matrix_coefficients mismatch: colr box = %hhu, "
             "AV1 sequence header = %hhu, using colr box",
             mc, aAv1TransferCharacteristics));
  }

  mColourPrimaries = cp;
  mTransferCharacteristics = tc;
  mMatrixCoefficients = mc;
}

// An interface to do decode and get the decoded data
class AVIFDecoderInterface {
 public:
  using Dav1dResult = nsAVIFDecoder::Dav1dResult;
  using NonAOMCodecError = nsAVIFDecoder::NonAOMCodecError;
  using AOMResult = nsAVIFDecoder::AOMResult;
  using NonDecoderResult = nsAVIFDecoder::NonDecoderResult;
  using DecodeResult = nsAVIFDecoder::DecodeResult;

  virtual ~AVIFDecoderInterface() = default;

  // Set the mDecodedData if Decode() succeeds
  virtual DecodeResult Decode(bool aIsMetadataDecode,
                              const Mp4parseAvifImage& parsedImg) = 0;
  // Must be called after Decode() succeeds
  AVIFDecodedData& GetDecodedData() {
    MOZ_ASSERT(mDecodedData.isSome());
    return mDecodedData.ref();
  }

 protected:
  explicit AVIFDecoderInterface(UniquePtr<AVIFParser>&& aParser)
      : mParser(std::move(aParser)) {
    MOZ_ASSERT(mParser);
  }

  inline static bool IsDecodeSuccess(const DecodeResult& aResult) {
    return nsAVIFDecoder::IsDecodeSuccess(aResult);
  }

  UniquePtr<AVIFParser> mParser;

  // The mDecodedData is valid after Decode() succeeds
  Maybe<AVIFDecodedData> mDecodedData;
};

class Dav1dDecoder final : AVIFDecoderInterface {
 public:
  ~Dav1dDecoder() {
    MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Destroy Dav1dDecoder=%p", this));

    if (mPicture) {
      dav1d_picture_unref(mPicture.take().ptr());
    }

    if (mAlphaPlane) {
      dav1d_picture_unref(mAlphaPlane.take().ptr());
    }

    if (mContext) {
      dav1d_close(&mContext);
      MOZ_ASSERT(!mContext);
    }
  }

  static DecodeResult Create(UniquePtr<AVIFParser>&& aParser,
                             UniquePtr<AVIFDecoderInterface>& aDecoder) {
    UniquePtr<Dav1dDecoder> d(new Dav1dDecoder(std::move(aParser)));
    Dav1dResult r = d->Init();
    if (r == 0) {
      MOZ_ASSERT(d->mContext);
      aDecoder.reset(d.release());
    }
    return AsVariant(r);
  }

  DecodeResult Decode(bool aIsMetadataDecode,
                      const Mp4parseAvifImage& parsedImg) override {
    MOZ_ASSERT(mParser);
    MOZ_ASSERT(mContext);
    MOZ_ASSERT(mPicture.isNothing());
    MOZ_ASSERT(mDecodedData.isNothing());

    MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("[this=%p] Beginning Decode", this));

    if (!parsedImg.primary_image.coded_data.data ||
        !parsedImg.primary_image.coded_data.length) {
      return AsVariant(NonDecoderResult::NoPrimaryItem);
    }

    mPicture.emplace();
    Dav1dResult r = GetPicture(parsedImg.primary_image.coded_data,
                               mPicture.ptr(), aIsMetadataDecode);
    if (r != 0) {
      mPicture.reset();
      return AsVariant(r);
    }

    if (parsedImg.alpha_image.coded_data.data &&
        parsedImg.alpha_image.coded_data.length) {
      mAlphaPlane.emplace();
      Dav1dResult r = GetPicture(parsedImg.alpha_image.coded_data,
                                 mAlphaPlane.ptr(), aIsMetadataDecode);
      if (r != 0) {
        mAlphaPlane.reset();
        return AsVariant(r);
      }

      // Per § 4 of the AVIF spec
      // https://aomediacodec.github.io/av1-avif/#auxiliary-images: An AV1
      // Alpha Image Item […] shall be encoded with the same bit depth as the
      // associated master AV1 Image Item
      if (mPicture->p.bpc != mAlphaPlane->p.bpc) {
        return AsVariant(NonDecoderResult::AlphaYColorDepthMismatch);
      }
    }

    MOZ_ASSERT_IF(mAlphaPlane.isNothing(), !parsedImg.premultiplied_alpha);
    mDecodedData.emplace(Dav1dPictureToDecodedData(
        parsedImg.nclx_colour_information, mPicture.ptr(),
        mAlphaPlane.ptrOr(nullptr), parsedImg.premultiplied_alpha));

    return AsVariant(r);
  }

 private:
  explicit Dav1dDecoder(UniquePtr<AVIFParser>&& aParser)
      : AVIFDecoderInterface(std::move(aParser)) {
    MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Create Dav1dDecoder=%p", this));
  }

  Dav1dResult Init() {
    MOZ_ASSERT(!mContext);

    Dav1dSettings settings;
    dav1d_default_settings(&settings);
    settings.all_layers = 0;
    settings.max_frame_delay = 1;
    // TODO: tune settings a la DAV1DDecoder for AV1 (Bug 1681816)

    return dav1d_open(&mContext, &settings);
  }

  Dav1dResult GetPicture(const Mp4parseByteData& aBytes, Dav1dPicture* aPicture,
                         bool aIsMetadataDecode) {
    MOZ_ASSERT(mContext);
    MOZ_ASSERT(aPicture);

    Dav1dData dav1dData;
    Dav1dResult r = dav1d_data_wrap(&dav1dData, aBytes.data, aBytes.length,
                                    Dav1dFreeCallback_s, nullptr);

    MOZ_LOG(sAVIFLog, r == 0 ? LogLevel::Verbose : LogLevel::Error,
            ("[this=%p] dav1d_data_wrap(%p, %zu) -> %d", this, dav1dData.data,
             dav1dData.sz, r));

    if (r != 0) {
      return r;
    }

    r = dav1d_send_data(mContext, &dav1dData);

    MOZ_LOG(sAVIFLog, r == 0 ? LogLevel::Debug : LogLevel::Error,
            ("[this=%p] dav1d_send_data -> %d", this, r));

    if (r != 0) {
      return r;
    }

    r = dav1d_get_picture(mContext, aPicture);

    MOZ_LOG(sAVIFLog, r == 0 ? LogLevel::Debug : LogLevel::Error,
            ("[this=%p] dav1d_get_picture -> %d", this, r));

    // When bug 1682662 is fixed, revise this assert and subsequent condition
    MOZ_ASSERT(aIsMetadataDecode || r == 0);

    // We already have the AVIF_DECODE_RESULT histogram to record all the
    // successful calls, so only bother recording what type of errors we see
    // via events. Unlike AOM, dav1d returns an int, not an enum, so this is
    // the easiest way to see if we're getting unexpected behavior to
    // investigate.
    if (aIsMetadataDecode && r != 0) {
      // Uncomment once bug 1691156 is fixed
      // mozilla::Telemetry::SetEventRecordingEnabled("avif"_ns, true);

      mozilla::Telemetry::RecordEvent(
          mozilla::Telemetry::EventID::Avif_Dav1dGetPicture_ReturnValue,
          Some(nsPrintfCString("%d", r)), Nothing());
    }

    return r;
  }

  // A dummy callback for dav1d_data_wrap
  static void Dav1dFreeCallback_s(const uint8_t* aBuf, void* aCookie) {
    // The buf is managed by the mParser inside Dav1dDecoder itself. Do
    // nothing here.
  }

  static AVIFDecodedData Dav1dPictureToDecodedData(
      const Mp4parseNclxColourInformation* aNclx, Dav1dPicture* aPicture,
      Dav1dPicture* aAlphaPlane, bool aPremultipliedAlpha);

  Dav1dContext* mContext = nullptr;

  // The pictures are allocated once Decode() succeeds and will be deallocated
  // when Dav1dDecoder is destroyed
  Maybe<Dav1dPicture> mPicture;
  Maybe<Dav1dPicture> mAlphaPlane;
};

class AOMDecoder final : AVIFDecoderInterface {
 public:
  ~AOMDecoder() {
    MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Destroy AOMDecoder=%p", this));

    if (mContext.isSome()) {
      aom_codec_err_t r = aom_codec_destroy(mContext.ptr());
      MOZ_LOG(sAVIFLog, LogLevel::Debug,
              ("[this=%p] aom_codec_destroy -> %d", this, r));
    }
  }

  static DecodeResult Create(UniquePtr<AVIFParser>&& aParser,
                             UniquePtr<AVIFDecoderInterface>& aDecoder) {
    UniquePtr<AOMDecoder> d(new AOMDecoder(std::move(aParser)));
    aom_codec_err_t e = d->Init();
    if (e == AOM_CODEC_OK) {
      MOZ_ASSERT(d->mContext);
      aDecoder.reset(d.release());
    }
    return AsVariant(AOMResult(e));
  }

  DecodeResult Decode(bool aIsMetadataDecode,
                      const Mp4parseAvifImage& parsedImg) override {
    MOZ_ASSERT(mParser);
    MOZ_ASSERT(mContext.isSome());
    MOZ_ASSERT(mDecodedData.isNothing());

    if (!parsedImg.primary_image.coded_data.data ||
        !parsedImg.primary_image.coded_data.length) {
      return AsVariant(NonDecoderResult::NoPrimaryItem);
    }

    aom_image_t* aomImg = nullptr;
    DecodeResult r = GetImage(parsedImg.primary_image.coded_data, &aomImg,
                              aIsMetadataDecode);
    if (!IsDecodeSuccess(r)) {
      return r;
    }
    MOZ_ASSERT(aomImg);

    // The aomImg will be released in next GetImage call (aom_codec_decode
    // actually). The GetImage could be called again immediately if parsedImg
    // contains alpha data. Therefore, we need to copy the image and manage it
    // by AOMDecoder itself.
    OwnedAOMImage* clonedImg = OwnedAOMImage::CopyFrom(aomImg, false);
    if (!clonedImg) {
      return AsVariant(NonDecoderResult::OutOfMemory);
    }
    mOwnedImage.reset(clonedImg);

    if (parsedImg.alpha_image.coded_data.data &&
        parsedImg.alpha_image.coded_data.length) {
      aom_image_t* alphaImg = nullptr;
      DecodeResult r = GetImage(parsedImg.alpha_image.coded_data, &alphaImg,
                                aIsMetadataDecode);
      if (!IsDecodeSuccess(r)) {
        return r;
      }
      MOZ_ASSERT(alphaImg);

      OwnedAOMImage* clonedAlphaImg = OwnedAOMImage::CopyFrom(alphaImg, true);
      if (!clonedAlphaImg) {
        return AsVariant(NonDecoderResult::OutOfMemory);
      }
      mOwnedAlphaPlane.reset(clonedAlphaImg);

      // Per § 4 of the AVIF spec
      // https://aomediacodec.github.io/av1-avif/#auxiliary-images: An AV1
      // Alpha Image Item […] shall be encoded with the same bit depth as the
      // associated master AV1 Image Item
      MOZ_ASSERT(mOwnedImage->GetImage() && mOwnedAlphaPlane->GetImage());
      if (mOwnedImage->GetImage()->bit_depth !=
          mOwnedAlphaPlane->GetImage()->bit_depth) {
        return AsVariant(NonDecoderResult::AlphaYColorDepthMismatch);
      }
    }

    MOZ_ASSERT_IF(!mOwnedAlphaPlane, !parsedImg.premultiplied_alpha);
    mDecodedData.emplace(AOMImageToToDecodedData(
        parsedImg.nclx_colour_information, mOwnedImage->GetImage(),
        mOwnedAlphaPlane ? mOwnedAlphaPlane->GetImage() : nullptr,
        parsedImg.premultiplied_alpha));

    return r;
  }

 private:
  explicit AOMDecoder(UniquePtr<AVIFParser>&& aParser)
      : AVIFDecoderInterface(std::move(aParser)) {
    MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Create AOMDecoder=%p", this));
  }

  aom_codec_err_t Init() {
    MOZ_ASSERT(mContext.isNothing());

    aom_codec_iface_t* iface = aom_codec_av1_dx();
    mContext.emplace();
    aom_codec_err_t r = aom_codec_dec_init(
        mContext.ptr(), iface, /* cfg = */ nullptr, /* flags = */ 0);

    MOZ_LOG(sAVIFLog, r == AOM_CODEC_OK ? LogLevel::Verbose : LogLevel::Error,
            ("[this=%p] aom_codec_dec_init -> %d, name = %s", this, r,
             mContext->name));

    if (r != AOM_CODEC_OK) {
      mContext.reset();
    }

    return r;
  }

  DecodeResult GetImage(const Mp4parseByteData& aData, aom_image_t** aImage,
                        bool aIsMetadataDecode) {
    MOZ_ASSERT(mContext.isSome());

    aom_codec_err_t r =
        aom_codec_decode(mContext.ptr(), aData.data, aData.length, nullptr);

    MOZ_LOG(sAVIFLog, r == AOM_CODEC_OK ? LogLevel::Verbose : LogLevel::Error,
            ("[this=%p] aom_codec_decode -> %d", this, r));

    if (aIsMetadataDecode) {
      switch (r) {
        case AOM_CODEC_OK:
          // No need to record any telemetry for the common case
          break;
        case AOM_CODEC_ERROR:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::error);
          break;
        case AOM_CODEC_MEM_ERROR:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::mem_error);
          break;
        case AOM_CODEC_ABI_MISMATCH:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::abi_mismatch);
          break;
        case AOM_CODEC_INCAPABLE:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::incapable);
          break;
        case AOM_CODEC_UNSUP_BITSTREAM:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::unsup_bitstream);
          break;
        case AOM_CODEC_UNSUP_FEATURE:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::unsup_feature);
          break;
        case AOM_CODEC_CORRUPT_FRAME:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::corrupt_frame);
          break;
        case AOM_CODEC_INVALID_PARAM:
          AccumulateCategorical(LABELS_AVIF_AOM_DECODE_ERROR::invalid_param);
          break;
        default:
          MOZ_ASSERT_UNREACHABLE(
              "Unknown aom_codec_err_t value from aom_codec_decode");
      }
    }

    if (r != AOM_CODEC_OK) {
      return AsVariant(AOMResult(r));
    }

    aom_codec_iter_t iter = nullptr;
    aom_image_t* img = aom_codec_get_frame(mContext.ptr(), &iter);

    MOZ_LOG(sAVIFLog, img == nullptr ? LogLevel::Error : LogLevel::Verbose,
            ("[this=%p] aom_codec_get_frame -> %p", this, img));

    if (img == nullptr) {
      return AsVariant(AOMResult(NonAOMCodecError::NoFrame));
    }

    const CheckedInt<int> decoded_width = img->d_w;
    const CheckedInt<int> decoded_height = img->d_h;

    if (!decoded_height.isValid() || !decoded_width.isValid()) {
      MOZ_LOG(sAVIFLog, LogLevel::Debug,
              ("[this=%p] image dimensions can't be stored in int: d_w: %u, "
               "d_h: %u",
               this, img->d_w, img->d_h));
      return AsVariant(AOMResult(NonAOMCodecError::SizeOverflow));
    }

    *aImage = img;
    return AsVariant(AOMResult(r));
  }

  class OwnedAOMImage {
   public:
    ~OwnedAOMImage() {
      MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Destroy OwnedAOMImage=%p", this));
    };

    static OwnedAOMImage* CopyFrom(aom_image_t* aImage, bool aIsAlpha) {
      MOZ_ASSERT(aImage);
      UniquePtr<OwnedAOMImage> img(new OwnedAOMImage());
      if (!img->CloneFrom(aImage, aIsAlpha)) {
        return nullptr;
      }
      return img.release();
    }

    aom_image_t* GetImage() { return mImage.isSome() ? mImage.ptr() : nullptr; }

   private:
    OwnedAOMImage() {
      MOZ_LOG(sAVIFLog, LogLevel::Verbose, ("Create OwnedAOMImage=%p", this));
    };

    bool CloneFrom(aom_image_t* aImage, bool aIsAlpha) {
      MOZ_ASSERT(aImage);
      MOZ_ASSERT(!mImage);
      MOZ_ASSERT(!mBuffer);

      uint8_t* srcY = aImage->planes[AOM_PLANE_Y];
      int yStride = aImage->stride[AOM_PLANE_Y];
      int yHeight = aom_img_plane_height(aImage, AOM_PLANE_Y);
      size_t yBufSize = yStride * yHeight;

      // If aImage is alpha plane. The data is located in Y channel.
      if (aIsAlpha) {
        mBuffer = MakeUnique<uint8_t[]>(yBufSize);
        if (!mBuffer) {
          return false;
        }
        uint8_t* destY = mBuffer.get();
        memcpy(destY, srcY, yBufSize);
        mImage.emplace(*aImage);
        mImage->planes[AOM_PLANE_Y] = destY;

        return true;
      }

      uint8_t* srcCb = aImage->planes[AOM_PLANE_U];
      int cbStride = aImage->stride[AOM_PLANE_U];
      int cbHeight = aom_img_plane_height(aImage, AOM_PLANE_U);
      size_t cbBufSize = cbStride * cbHeight;

      uint8_t* srcCr = aImage->planes[AOM_PLANE_V];
      int crStride = aImage->stride[AOM_PLANE_V];
      int crHeight = aom_img_plane_height(aImage, AOM_PLANE_V);
      size_t crBufSize = crStride * crHeight;

      mBuffer = MakeUnique<uint8_t[]>(yBufSize + cbBufSize + crBufSize);
      if (!mBuffer) {
        return false;
      }

      uint8_t* destY = mBuffer.get();
      uint8_t* destCb = destY + yBufSize;
      uint8_t* destCr = destCb + cbBufSize;

      memcpy(destY, srcY, yBufSize);
      memcpy(destCb, srcCb, cbBufSize);
      memcpy(destCr, srcCr, crBufSize);

      mImage.emplace(*aImage);
      mImage->planes[AOM_PLANE_Y] = destY;
      mImage->planes[AOM_PLANE_U] = destCb;
      mImage->planes[AOM_PLANE_V] = destCr;

      return true;
    }

    // The mImage's planes are referenced to mBuffer
    Maybe<aom_image_t> mImage;
    UniquePtr<uint8_t[]> mBuffer;
  };

  static AVIFDecodedData AOMImageToToDecodedData(
      const Mp4parseNclxColourInformation* aNclx, aom_image_t* aImage,
      aom_image_t* aAlphaPlane, bool aPremultipliedAlpha);

  Maybe<aom_codec_ctx_t> mContext;
  UniquePtr<OwnedAOMImage> mOwnedImage;
  UniquePtr<OwnedAOMImage> mOwnedAlphaPlane;
};

/* static */
AVIFDecodedData Dav1dDecoder::Dav1dPictureToDecodedData(
    const Mp4parseNclxColourInformation* aNclx, Dav1dPicture* aPicture,
    Dav1dPicture* aAlphaPlane, bool aPremultipliedAlpha) {
  MOZ_ASSERT(aPicture);

  static_assert(std::is_same<int, decltype(aPicture->p.w)>::value);
  static_assert(std::is_same<int, decltype(aPicture->p.h)>::value);

  AVIFDecodedData data;

  data.mYChannel = static_cast<uint8_t*>(aPicture->data[0]);
  data.mYStride = aPicture->stride[0];
  data.mYSkip = aPicture->stride[0] - aPicture->p.w;
  data.mCbChannel = static_cast<uint8_t*>(aPicture->data[1]);
  data.mCrChannel = static_cast<uint8_t*>(aPicture->data[2]);
  data.mCbCrStride = aPicture->stride[1];

  switch (aPicture->p.layout) {
    case DAV1D_PIXEL_LAYOUT_I400:  // Monochrome, so no Cb or Cr channels
      break;
    case DAV1D_PIXEL_LAYOUT_I420:
      data.mChromaSubsampling = ChromaSubsampling::HALF_WIDTH_AND_HEIGHT;
      break;
    case DAV1D_PIXEL_LAYOUT_I422:
      data.mChromaSubsampling = ChromaSubsampling::HALF_WIDTH;
      break;
    case DAV1D_PIXEL_LAYOUT_I444:
      break;
    default:
      MOZ_ASSERT_UNREACHABLE("Unknown pixel layout");
  }

  data.mCbSkip = aPicture->stride[1] - aPicture->p.w;
  data.mCrSkip = aPicture->stride[1] - aPicture->p.w;
  data.mPictureRect = IntRect(0, 0, aPicture->p.w, aPicture->p.h);
  data.mStereoMode = StereoMode::MONO;
  data.mColorDepth = ColorDepthForBitDepth(aPicture->p.bpc);

  MOZ_ASSERT(aPicture->p.bpc == BitDepthForColorDepth(data.mColorDepth));

  data.mYUVColorSpace = GetAVIFColorSpace(aNclx, [=]() {
    MOZ_LOG(sAVIFLog, LogLevel::Info,
            ("YUVColorSpace cannot be determined from colr box, using AV1 "
             "sequence header"));
    return DAV1DDecoder::GetColorSpace(*aPicture, sAVIFLog);
  });

  auto av1ColourPrimaries = CICP::ColourPrimaries::CP_UNSPECIFIED;
  auto av1TransferCharacteristics =
      CICP::TransferCharacteristics::TC_UNSPECIFIED;
  auto av1MatrixCoefficients = CICP::MatrixCoefficients::MC_UNSPECIFIED;

  MOZ_ASSERT(aPicture->seq_hdr);
  auto& seq_hdr = *aPicture->seq_hdr;

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("seq_hdr.color_description_present: %d",
           seq_hdr.color_description_present));
  if (seq_hdr.color_description_present) {
    av1ColourPrimaries = static_cast<CICP::ColourPrimaries>(seq_hdr.pri);
    av1TransferCharacteristics =
        static_cast<CICP::TransferCharacteristics>(seq_hdr.trc);
    av1MatrixCoefficients = static_cast<CICP::MatrixCoefficients>(seq_hdr.mtrx);
  }

  data.SetCicpValues(aNclx, av1ColourPrimaries, av1TransferCharacteristics,
                     av1MatrixCoefficients);

  gfx::ColorRange av1ColorRange =
      seq_hdr.color_range ? gfx::ColorRange::FULL : gfx::ColorRange::LIMITED;
  data.mColorRange = GetAVIFColorRange(aNclx, av1ColorRange);

  auto colorPrimaries =
      gfxUtils::CicpToColorPrimaries(data.mColourPrimaries, sAVIFLog);
  if (colorPrimaries.isSome()) {
    data.mColorPrimaries = *colorPrimaries;
  }

  if (aAlphaPlane) {
    MOZ_ASSERT(aAlphaPlane->stride[0] == data.mYStride);
    data.mAlpha.emplace();
    data.mAlpha->mChannel = static_cast<uint8_t*>(aAlphaPlane->data[0]);
    data.mAlpha->mSize = gfx::IntSize(aAlphaPlane->p.w, aAlphaPlane->p.h);
    data.mAlpha->mPremultiplied = aPremultipliedAlpha;
  }

  return data;
}

/* static */
AVIFDecodedData AOMDecoder::AOMImageToToDecodedData(
    const Mp4parseNclxColourInformation* aNclx, aom_image_t* aImage,
    aom_image_t* aAlphaPlane, bool aPremultipliedAlpha) {
  MOZ_ASSERT(aImage);
  MOZ_ASSERT(aImage->stride[AOM_PLANE_Y] == aImage->stride[AOM_PLANE_ALPHA]);
  MOZ_ASSERT(aImage->stride[AOM_PLANE_Y] >=
             aom_img_plane_width(aImage, AOM_PLANE_Y));
  MOZ_ASSERT(aImage->stride[AOM_PLANE_U] == aImage->stride[AOM_PLANE_V]);
  MOZ_ASSERT(aImage->stride[AOM_PLANE_U] >=
             aom_img_plane_width(aImage, AOM_PLANE_U));
  MOZ_ASSERT(aImage->stride[AOM_PLANE_V] >=
             aom_img_plane_width(aImage, AOM_PLANE_V));
  MOZ_ASSERT(aom_img_plane_width(aImage, AOM_PLANE_U) ==
             aom_img_plane_width(aImage, AOM_PLANE_V));
  MOZ_ASSERT(aom_img_plane_height(aImage, AOM_PLANE_U) ==
             aom_img_plane_height(aImage, AOM_PLANE_V));

  AVIFDecodedData data;

  data.mYChannel = aImage->planes[AOM_PLANE_Y];
  data.mYStride = aImage->stride[AOM_PLANE_Y];
  data.mYSkip =
      aImage->stride[AOM_PLANE_Y] - aom_img_plane_width(aImage, AOM_PLANE_Y);
  data.mCbChannel = aImage->planes[AOM_PLANE_U];
  data.mCrChannel = aImage->planes[AOM_PLANE_V];
  data.mCbCrStride = aImage->stride[AOM_PLANE_U];
  data.mCbSkip =
      aImage->stride[AOM_PLANE_U] - aom_img_plane_width(aImage, AOM_PLANE_U);
  data.mCrSkip =
      aImage->stride[AOM_PLANE_V] - aom_img_plane_width(aImage, AOM_PLANE_V);
  data.mPictureRect = gfx::IntRect(0, 0, aImage->d_w, aImage->d_h);
  data.mStereoMode = StereoMode::MONO;
  data.mColorDepth = ColorDepthForBitDepth(aImage->bit_depth);

  if (aImage->x_chroma_shift == 1 && aImage->y_chroma_shift == 1) {
    data.mChromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH_AND_HEIGHT;
  } else if (aImage->x_chroma_shift == 1 && aImage->y_chroma_shift == 0) {
    data.mChromaSubsampling = gfx::ChromaSubsampling::HALF_WIDTH;
  } else if (aImage->x_chroma_shift != 0 || aImage->y_chroma_shift != 0) {
    MOZ_ASSERT_UNREACHABLE("unexpected chroma shifts");
  }

  MOZ_ASSERT(aImage->bit_depth == BitDepthForColorDepth(data.mColorDepth));

  auto av1ColourPrimaries = static_cast<CICP::ColourPrimaries>(aImage->cp);
  auto av1TransferCharacteristics =
      static_cast<CICP::TransferCharacteristics>(aImage->tc);
  auto av1MatrixCoefficients =
      static_cast<CICP::MatrixCoefficients>(aImage->mc);

  data.mYUVColorSpace = GetAVIFColorSpace(aNclx, [=]() {
    MOZ_LOG(sAVIFLog, LogLevel::Info,
            ("YUVColorSpace cannot be determined from colr box, using AV1 "
             "sequence header"));
    return gfxUtils::CicpToColorSpace(av1MatrixCoefficients, av1ColourPrimaries,
                                      sAVIFLog);
  });

  gfx::ColorRange av1ColorRange;
  if (aImage->range == AOM_CR_STUDIO_RANGE) {
    av1ColorRange = gfx::ColorRange::LIMITED;
  } else {
    MOZ_ASSERT(aImage->range == AOM_CR_FULL_RANGE);
    av1ColorRange = gfx::ColorRange::FULL;
  }
  data.mColorRange = GetAVIFColorRange(aNclx, av1ColorRange);

  data.SetCicpValues(aNclx, av1ColourPrimaries, av1TransferCharacteristics,
                     av1MatrixCoefficients);

  auto colorPrimaries =
      gfxUtils::CicpToColorPrimaries(data.mColourPrimaries, sAVIFLog);
  if (colorPrimaries.isSome()) {
    data.mColorPrimaries = *colorPrimaries;
  }

  if (aAlphaPlane) {
    MOZ_ASSERT(aAlphaPlane->stride[AOM_PLANE_Y] == data.mYStride);
    data.mAlpha.emplace();
    data.mAlpha->mChannel = aAlphaPlane->planes[AOM_PLANE_Y];
    data.mAlpha->mSize = gfx::IntSize(aAlphaPlane->d_w, aAlphaPlane->d_h);
    data.mAlpha->mPremultiplied = aPremultipliedAlpha;
  }

  return data;
}

// Wrapper to allow rust to call our read adaptor.
intptr_t nsAVIFDecoder::ReadSource(uint8_t* aDestBuf, uintptr_t aDestBufSize,
                                   void* aUserData) {
  MOZ_ASSERT(aDestBuf);
  MOZ_ASSERT(aUserData);

  MOZ_LOG(sAVIFLog, LogLevel::Verbose,
          ("AVIF ReadSource, aDestBufSize: %zu", aDestBufSize));

  auto* decoder = reinterpret_cast<nsAVIFDecoder*>(aUserData);

  MOZ_ASSERT(decoder->mReadCursor);

  size_t bufferLength = decoder->mBufferedData.end() - decoder->mReadCursor;
  size_t n_bytes = std::min(aDestBufSize, bufferLength);

  MOZ_LOG(
      sAVIFLog, LogLevel::Verbose,
      ("AVIF ReadSource, %zu bytes ready, copying %zu", bufferLength, n_bytes));

  memcpy(aDestBuf, decoder->mReadCursor, n_bytes);
  decoder->mReadCursor += n_bytes;

  return n_bytes;
}

nsAVIFDecoder::nsAVIFDecoder(RasterImage* aImage) : Decoder(aImage) {
  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] nsAVIFDecoder::nsAVIFDecoder", this));
}

nsAVIFDecoder::~nsAVIFDecoder() {
  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] nsAVIFDecoder::~nsAVIFDecoder", this));
}

LexerResult nsAVIFDecoder::DoDecode(SourceBufferIterator& aIterator,
                                    IResumable* aOnResume) {
  MOZ_LOG(sAVIFLog, LogLevel::Info,
          ("[this=%p] nsAVIFDecoder::DoDecode start", this));

  DecodeResult result = Decode(aIterator, aOnResume);

  RecordDecodeResultTelemetry(result);

  if (result.is<NonDecoderResult>()) {
    NonDecoderResult r = result.as<NonDecoderResult>();
    if (r == NonDecoderResult::NeedMoreData) {
      return LexerResult(Yield::NEED_MORE_DATA);
    }
    return r == NonDecoderResult::MetadataOk
               ? LexerResult(TerminalState::SUCCESS)
               : LexerResult(TerminalState::FAILURE);
  }

  MOZ_ASSERT(result.is<Dav1dResult>() || result.is<AOMResult>() ||
             result.is<Mp4parseStatus>());
  // If IsMetadataDecode(), a successful parse should return
  // NonDecoderResult::MetadataOk or else continue to the decode stage
  MOZ_ASSERT_IF(result.is<Mp4parseStatus>(),
                result.as<Mp4parseStatus>() != MP4PARSE_STATUS_OK);
  auto rv = LexerResult(IsDecodeSuccess(result) ? TerminalState::SUCCESS
                                                : TerminalState::FAILURE);
  MOZ_LOG(sAVIFLog, LogLevel::Info,
          ("[this=%p] nsAVIFDecoder::DoDecode end", this));
  return rv;
}

nsAVIFDecoder::DecodeResult nsAVIFDecoder::Decode(
    SourceBufferIterator& aIterator, IResumable* aOnResume) {
  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] nsAVIFDecoder::DoDecode", this));

  // Since the SourceBufferIterator doesn't guarantee a contiguous buffer,
  // but the current mp4parse-rust implementation requires it, always buffer
  // locally. This keeps the code simpler at the cost of some performance, but
  // this implementation is only experimental, so we don't want to spend time
  // optimizing it prematurely.
  while (!mReadCursor) {
    SourceBufferIterator::State state =
        aIterator.AdvanceOrScheduleResume(SIZE_MAX, aOnResume);

    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] After advance, iterator state is %d", this, state));

    switch (state) {
      case SourceBufferIterator::WAITING:
        return AsVariant(NonDecoderResult::NeedMoreData);

      case SourceBufferIterator::COMPLETE:
        mReadCursor = mBufferedData.begin();
        break;

      case SourceBufferIterator::READY: {  // copy new data to buffer
        MOZ_LOG(sAVIFLog, LogLevel::Debug,
                ("[this=%p] SourceBufferIterator ready, %zu bytes available",
                 this, aIterator.Length()));

        bool appendSuccess =
            mBufferedData.append(aIterator.Data(), aIterator.Length());

        if (!appendSuccess) {
          MOZ_LOG(sAVIFLog, LogLevel::Error,
                  ("[this=%p] Failed to append %zu bytes to buffer", this,
                   aIterator.Length()));
        }

        break;
      }

      default:
        MOZ_ASSERT_UNREACHABLE("unexpected SourceBufferIterator state");
    }
  }

  Mp4parseIo io = {nsAVIFDecoder::ReadSource, this};
  UniquePtr<AVIFParser> parser;
  Mp4parseStatus create_parser_status = AVIFParser::Create(&io, parser);

  if (!parser) {
    return AsVariant(create_parser_status);
  }

  const Mp4parseAvifImage* parsedImagePtr = parser->GetImage();
  if (!parsedImagePtr) {
    return AsVariant(NonDecoderResult::NoPrimaryItem);
  }
  const Mp4parseAvifImage& parsedImg = *parsedImagePtr;

  if (parsedImg.icc_colour_information.data) {
    const auto& icc = parsedImg.icc_colour_information;
    MOZ_LOG(
        sAVIFLog, LogLevel::Debug,
        ("[this=%p] colr type ICC: %zu bytes %p", this, icc.length, icc.data));
  }

  if (IsMetadataDecode()) {
    // Only record metadata telemetry on the metadata decode call, or else it
    // would be double-counted

    if (parsedImg.pixel_aspect_ratio) {
      const uint32_t& h_spacing = parsedImg.pixel_aspect_ratio->h_spacing;
      const uint32_t& v_spacing = parsedImg.pixel_aspect_ratio->v_spacing;

      if (h_spacing == 0 || v_spacing == 0) {
        AccumulateCategorical(LABELS_AVIF_PASP::invalid);
      } else if (h_spacing == v_spacing) {
        AccumulateCategorical(LABELS_AVIF_PASP::square);
      } else {
        AccumulateCategorical(LABELS_AVIF_PASP::nonsquare);
      }
    } else {
      AccumulateCategorical(LABELS_AVIF_PASP::absent);
    }

    const auto& major_brand = parsedImg.major_brand;
    if (!memcmp(major_brand, "avif", sizeof(major_brand))) {
      AccumulateCategorical(LABELS_AVIF_MAJOR_BRAND::avif);
    } else if (!memcmp(major_brand, "avis", sizeof(major_brand))) {
      AccumulateCategorical(LABELS_AVIF_MAJOR_BRAND::avis);
    } else {
      AccumulateCategorical(LABELS_AVIF_MAJOR_BRAND::other);
    }

    AccumulateCategorical(parsedImg.has_sequence
                              ? LABELS_AVIF_SEQUENCE::present
                              : LABELS_AVIF_SEQUENCE::absent);

#define FEATURE_TELEMETRY(fourcc)                                  \
  AccumulateCategorical((parsedImg.unsupported_features_bitfield & \
                         (1 << MP4PARSE_FEATURE_##fourcc))         \
                            ? LABELS_AVIF_##fourcc::present        \
                            : LABELS_AVIF_##fourcc::absent)
    FEATURE_TELEMETRY(A1LX);
    FEATURE_TELEMETRY(A1OP);
    FEATURE_TELEMETRY(CLAP);
    FEATURE_TELEMETRY(GRID);
    FEATURE_TELEMETRY(IPRO);
    FEATURE_TELEMETRY(LSEL);
  }

  if (parsedImg.nclx_colour_information) {
    const auto& nclx = *parsedImg.nclx_colour_information;
    MOZ_LOG(
        sAVIFLog, LogLevel::Debug,
        ("[this=%p] colr type CICP: cp/tc/mc/full-range %u/%u/%u/%s", this,
         nclx.colour_primaries, nclx.transfer_characteristics,
         nclx.matrix_coefficients, nclx.full_range_flag ? "true" : "false"));
  }

  if (!parsedImg.icc_colour_information.data &&
      !parsedImg.nclx_colour_information) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] colr box not present", this));
  }

  if (parsedImg.alpha_image.coded_data.data) {
    PostHasTransparency();
  }

  Orientation orientation = StaticPrefs::image_avif_apply_transforms()
                                ? GetImageOrientation(parsedImg)
                                : Orientation{};
  MaybeIntSize parsedImageSize = GetImageSize(parsedImg);
  Maybe<uint8_t> primaryBitDepth =
      BitsPerChannelToBitDepth(parsedImg.primary_image.bits_per_channel);
  Maybe<uint8_t> alphaBitDepth =
      BitsPerChannelToBitDepth(parsedImg.alpha_image.bits_per_channel);

  if (parsedImageSize.isSome()) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] Parser returned image size %d x %d (%d/%d bit)", this,
             parsedImageSize->width, parsedImageSize->height,
             primaryBitDepth.valueOr(0), alphaBitDepth.valueOr(0)));
    PostSize(parsedImageSize->width, parsedImageSize->height, orientation);
    if (IsMetadataDecode()) {
      MOZ_LOG(
          sAVIFLog, LogLevel::Debug,
          ("[this=%p] Finishing metadata decode without image decode", this));
      return AsVariant(NonDecoderResult::MetadataOk);
    }
  } else {
    MOZ_LOG(sAVIFLog, LogLevel::Error,
            ("[this=%p] Parser returned no image size, decoding...", this));
  }

  UniquePtr<AVIFDecoderInterface> decoder;
  DecodeResult r = StaticPrefs::image_avif_use_dav1d()
                       ? Dav1dDecoder::Create(std::move(parser), decoder)
                       : AOMDecoder::Create(std::move(parser), decoder);

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] Create %sDecoder %ssuccessfully", this,
           StaticPrefs::image_avif_use_dav1d() ? "Dav1d" : "AOM",
           IsDecodeSuccess(r) ? "" : "un"));

  if (!IsDecodeSuccess(r)) {
    return r;
  }

  MOZ_ASSERT(decoder);
  r = decoder->Decode(IsMetadataDecode(), parsedImg);
  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] Decoder%s->Decode() %s", this,
           StaticPrefs::image_avif_use_dav1d() ? "Dav1d" : "AOM",
           IsDecodeSuccess(r) ? "succeeds" : "fails"));

  if (!IsDecodeSuccess(r)) {
    return r;
  }

  AVIFDecodedData& decodedData = decoder->GetDecodedData();

  MOZ_ASSERT(decodedData.mColourPrimaries !=
             CICP::ColourPrimaries::CP_UNSPECIFIED);
  MOZ_ASSERT(decodedData.mTransferCharacteristics !=
             CICP::TransferCharacteristics::TC_UNSPECIFIED);
  MOZ_ASSERT(decodedData.mColorRange <= gfx::ColorRange::_Last);
  MOZ_ASSERT(decodedData.mYUVColorSpace <= gfx::YUVColorSpace::_Last);

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] decodedData.mColorRange: %hhd", this,
           static_cast<uint8_t>(decodedData.mColorRange)));

  // Technically it's valid but we don't handle it now (Bug 1682318).
  if (decodedData.mAlpha &&
      decodedData.mAlpha->mSize != decodedData.YDataSize()) {
    return AsVariant(NonDecoderResult::AlphaYSizeMismatch);
  }

  if (parsedImageSize.isNothing()) {
    MOZ_LOG(sAVIFLog, LogLevel::Error,
            ("[this=%p] Using decoded image size: %d x %d", this,
             decodedData.mPictureRect.width, decodedData.mPictureRect.height));
    PostSize(decodedData.mPictureRect.width, decodedData.mPictureRect.height,
             orientation);
    AccumulateCategorical(LABELS_AVIF_ISPE::absent);
  } else if (decodedData.mPictureRect.width != parsedImageSize->width ||
             decodedData.mPictureRect.height != parsedImageSize->height) {
    MOZ_LOG(sAVIFLog, LogLevel::Error,
            ("[this=%p] Metadata image size doesn't match decoded image size: "
             "(%d x %d) != (%d x %d)",
             this, parsedImageSize->width, parsedImageSize->height,
             decodedData.mPictureRect.width, decodedData.mPictureRect.height));
    AccumulateCategorical(LABELS_AVIF_ISPE::bitstream_mismatch);
    return AsVariant(NonDecoderResult::MetadataImageSizeMismatch);
  } else {
    AccumulateCategorical(LABELS_AVIF_ISPE::valid);
  }

  const bool hasAlpha = decodedData.mAlpha.isSome();
  if (hasAlpha) {
    PostHasTransparency();
  }

  if (IsMetadataDecode()) {
    return AsVariant(NonDecoderResult::MetadataOk);
  }

  // The following telemetry may depend on the results of decoding.
  // These data must be recorded after metadata has been decoded
  // (IsMetadataDecode()=false) or else they would be double-counted.

  AccumulateCategorical(
      gColorSpaceLabel[static_cast<size_t>(decodedData.mYUVColorSpace)]);
  AccumulateCategorical(
      gColorDepthLabel[static_cast<size_t>(decodedData.mColorDepth)]);

  RecordPixiTelemetry(primaryBitDepth,
                      BitDepthForColorDepth(decodedData.mColorDepth),
                      "primary");

  if (decodedData.mAlpha) {
    AccumulateCategorical(LABELS_AVIF_ALPHA::present);
    RecordPixiTelemetry(alphaBitDepth,
                        BitDepthForColorDepth(decodedData.mAlpha->mDepth),
                        "alpha");
  } else {
    AccumulateCategorical(LABELS_AVIF_ALPHA::absent);
  }

  IntSize rgbSize = decodedData.mPictureRect.Size();
  MOZ_ASSERT(
      rgbSize ==
      GetImageMetadata().GetOrientation().ToUnoriented(Size()).ToUnknownSize());

  if (parsedImg.nclx_colour_information &&
      parsedImg.icc_colour_information.data) {
    AccumulateCategorical(LABELS_AVIF_COLR::both);
  } else if (parsedImg.nclx_colour_information) {
    AccumulateCategorical(LABELS_AVIF_COLR::nclx);
  } else if (parsedImg.icc_colour_information.data) {
    AccumulateCategorical(LABELS_AVIF_COLR::icc);
  } else {
    AccumulateCategorical(LABELS_AVIF_COLR::absent);
  }

  if (CICP::IsReserved(decodedData.mColourPrimaries)) {
    AccumulateCategorical(LABELS_AVIF_CICP_CP::RESERVED_REST);
  } else {
    AccumulateCategorical(
        static_cast<LABELS_AVIF_CICP_CP>(decodedData.mColourPrimaries));
  }

  if (CICP::IsReserved(decodedData.mTransferCharacteristics)) {
    AccumulateCategorical(LABELS_AVIF_CICP_TC::RESERVED);
  } else {
    AccumulateCategorical(
        static_cast<LABELS_AVIF_CICP_TC>(decodedData.mTransferCharacteristics));
  }

  if (CICP::IsReserved(decodedData.mMatrixCoefficients)) {
    AccumulateCategorical(LABELS_AVIF_CICP_MC::RESERVED);
  } else {
    AccumulateCategorical(
        static_cast<LABELS_AVIF_CICP_MC>(decodedData.mMatrixCoefficients));
  }

  // Read color profile
  if (mCMSMode != CMSMode::Off) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] Processing color profile", this));

    // See comment on AVIFDecodedData
    if (parsedImg.icc_colour_information.data) {
      const auto& icc = parsedImg.icc_colour_information;
      mInProfile = qcms_profile_from_memory(icc.data, icc.length);
    } else {
      const auto& cp = decodedData.mColourPrimaries;
      const auto& tc = decodedData.mTransferCharacteristics;

      if (CICP::IsReserved(cp)) {
        MOZ_LOG(sAVIFLog, LogLevel::Error,
                ("[this=%p] colour_primaries reserved value (%hhu) is invalid; "
                 "failing",
                 this, cp));
        return AsVariant(NonDecoderResult::InvalidCICP);
      }

      if (CICP::IsReserved(tc)) {
        MOZ_LOG(sAVIFLog, LogLevel::Error,
                ("[this=%p] transfer_characteristics reserved value (%hhu) is "
                 "invalid; failing",
                 this, tc));
        return AsVariant(NonDecoderResult::InvalidCICP);
      }

      MOZ_ASSERT(cp != CICP::ColourPrimaries::CP_UNSPECIFIED &&
                 !CICP::IsReserved(cp));
      MOZ_ASSERT(tc != CICP::TransferCharacteristics::TC_UNSPECIFIED &&
                 !CICP::IsReserved(tc));

      mInProfile = qcms_profile_create_cicp(cp, tc);
    }

    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] mInProfile %p", this, mInProfile));
  } else {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] CMSMode::Off, skipping color profile", this));
  }

  if (mInProfile && GetCMSOutputProfile()) {
    auto intent = static_cast<qcms_intent>(gfxPlatform::GetRenderingIntent());
    qcms_data_type inType;
    qcms_data_type outType;

    // If we're not mandating an intent, use the one from the image.
    if (gfxPlatform::GetRenderingIntent() == -1) {
      intent = qcms_profile_get_rendering_intent(mInProfile);
    }

    uint32_t profileSpace = qcms_profile_get_color_space(mInProfile);
    if (profileSpace != icSigGrayData) {
      // If the transform happens with SurfacePipe, it will be in RGBA if we
      // have an alpha channel, because the swizzle and premultiplication
      // happens after color management. Otherwise it will be in BGRA because
      // the swizzle happens at the start.
      if (hasAlpha) {
        inType = QCMS_DATA_RGBA_8;
        outType = QCMS_DATA_RGBA_8;
      } else {
        inType = gfxPlatform::GetCMSOSRGBAType();
        outType = inType;
      }
    } else {
      if (hasAlpha) {
        inType = QCMS_DATA_GRAYA_8;
        outType = gfxPlatform::GetCMSOSRGBAType();
      } else {
        inType = QCMS_DATA_GRAY_8;
        outType = gfxPlatform::GetCMSOSRGBAType();
      }
    }

    mTransform = qcms_transform_create(mInProfile, inType,
                                       GetCMSOutputProfile(), outType, intent);
  }

  // Get suggested format and size. Note that GetYCbCrToRGBDestFormatAndSize
  // force format to be B8G8R8X8 if it's not.
  gfx::SurfaceFormat format = SurfaceFormat::OS_RGBX;
  gfx::GetYCbCrToRGBDestFormatAndSize(decodedData, format, rgbSize);
  if (hasAlpha) {
    // We would use libyuv to do the YCbCrA -> ARGB convertion, which only
    // works for B8G8R8A8.
    format = SurfaceFormat::B8G8R8A8;
  }

  const int bytesPerPixel = BytesPerPixel(format);

  const CheckedInt rgbStride = CheckedInt<int>(rgbSize.width) * bytesPerPixel;
  const CheckedInt rgbBufLength = rgbStride * rgbSize.height;

  if (!rgbStride.isValid() || !rgbBufLength.isValid()) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] overflow calculating rgbBufLength: rbgSize.width: %d, "
             "rgbSize.height: %d, "
             "bytesPerPixel: %u",
             this, rgbSize.width, rgbSize.height, bytesPerPixel));
    return AsVariant(NonDecoderResult::SizeOverflow);
  }

  UniquePtr<uint8_t[]> rgbBuf = MakeUnique<uint8_t[]>(rgbBufLength.value());
  const uint8_t* endOfRgbBuf = {rgbBuf.get() + rgbBufLength.value()};

  if (!rgbBuf) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] allocation of %u-byte rgbBuf failed", this,
             rgbBufLength.value()));
    return AsVariant(NonDecoderResult::OutOfMemory);
  }

  if (decodedData.mAlpha) {
    const auto wantPremultiply =
        !bool(GetSurfaceFlags() & SurfaceFlags::NO_PREMULTIPLY_ALPHA);
    const bool& hasPremultiply = decodedData.mAlpha->mPremultiplied;

    PremultFunc premultOp = nullptr;
    if (wantPremultiply && !hasPremultiply) {
      premultOp = libyuv::ARGBAttenuate;
    } else if (!wantPremultiply && hasPremultiply) {
      premultOp = libyuv::ARGBUnattenuate;
    }

    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] calling gfx::ConvertYCbCrAToARGB premultOp: %p", this,
             premultOp));
    gfx::ConvertYCbCrAToARGB(decodedData, *decodedData.mAlpha, format, rgbSize,
                             rgbBuf.get(), rgbStride.value(), premultOp);
  } else {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] calling gfx::ConvertYCbCrToRGB", this));
    gfx::ConvertYCbCrToRGB(decodedData, format, rgbSize, rgbBuf.get(),
                           rgbStride.value());
  }

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] calling SurfacePipeFactory::CreateSurfacePipe", this));
  Maybe<SurfacePipe> pipe = SurfacePipeFactory::CreateReorientSurfacePipe(
      this, Size(), OutputSize(), format, mTransform, GetOrientation());

  if (!pipe) {
    MOZ_LOG(sAVIFLog, LogLevel::Debug,
            ("[this=%p] could not initialize surface pipe", this));
    return AsVariant(NonDecoderResult::PipeInitError);
  }

  MOZ_LOG(sAVIFLog, LogLevel::Debug, ("[this=%p] writing to surface", this));
  WriteState writeBufferResult = WriteState::NEED_MORE_DATA;
  for (uint8_t* rowPtr = rgbBuf.get(); rowPtr < endOfRgbBuf;
       rowPtr += rgbStride.value()) {
    writeBufferResult = pipe->WriteBuffer(reinterpret_cast<uint32_t*>(rowPtr));

    Maybe<SurfaceInvalidRect> invalidRect = pipe->TakeInvalidRect();
    if (invalidRect) {
      PostInvalidation(invalidRect->mInputSpaceRect,
                       Some(invalidRect->mOutputSpaceRect));
    }

    if (writeBufferResult == WriteState::FAILURE) {
      MOZ_LOG(sAVIFLog, LogLevel::Debug,
              ("[this=%p] error writing rowPtr to surface pipe", this));

    } else if (writeBufferResult == WriteState::FINISHED) {
      MOZ_ASSERT(rowPtr + rgbStride.value() == endOfRgbBuf);
    }
  }

  MOZ_LOG(sAVIFLog, LogLevel::Debug,
          ("[this=%p] writing to surface complete", this));

  if (writeBufferResult == WriteState::FINISHED) {
    PostFrameStop(hasAlpha ? Opacity::SOME_TRANSPARENCY
                           : Opacity::FULLY_OPAQUE);
    PostDecodeDone();
    return r;
  }

  return AsVariant(NonDecoderResult::WriteBufferError);
}

/* static */
bool nsAVIFDecoder::IsDecodeSuccess(const DecodeResult& aResult) {
  if (aResult.is<Dav1dResult>() || aResult.is<AOMResult>()) {
    return aResult == DecodeResult(Dav1dResult(0)) ||
           aResult == DecodeResult(AOMResult(AOM_CODEC_OK));
  }
  return false;
}

void nsAVIFDecoder::RecordDecodeResultTelemetry(
    const nsAVIFDecoder::DecodeResult& aResult) {
  if (aResult.is<Mp4parseStatus>()) {
    switch (aResult.as<Mp4parseStatus>()) {
      case MP4PARSE_STATUS_OK:
        MOZ_ASSERT_UNREACHABLE(
            "Expect NonDecoderResult, Dav1dResult or AOMResult");
        return;
      case MP4PARSE_STATUS_BAD_ARG:
      case MP4PARSE_STATUS_INVALID:
      case MP4PARSE_STATUS_UNSUPPORTED:
      case MP4PARSE_STATUS_EOF:
      case MP4PARSE_STATUS_IO:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::parse_error);
        return;
      case MP4PARSE_STATUS_OOM:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::out_of_memory);
        return;
      case MP4PARSE_STATUS_MISSING_BRAND:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::missing_brand);
        return;
      case MP4PARSE_STATUS_FTYP_NOT_FIRST:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::ftyp_not_first);
        return;
      case MP4PARSE_STATUS_NO_IMAGE:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::no_image);
        return;
      case MP4PARSE_STATUS_MULTIPLE_MOOV:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::multiple_moov);
        return;
      case MP4PARSE_STATUS_NO_MOOV:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::no_moov);
        return;
      case MP4PARSE_STATUS_LSEL_NO_ESSENTIAL:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::lsel_no_essential);
        return;
      case MP4PARSE_STATUS_A1OP_NO_ESSENTIAL:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::a1op_no_essential);
        return;
      case MP4PARSE_STATUS_A1LX_ESSENTIAL:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::a1lx_essential);
        return;
      case MP4PARSE_STATUS_TXFORM_NO_ESSENTIAL:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::txform_no_essential);
        return;
      case MP4PARSE_STATUS_NO_PRIMARY_ITEM:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::no_primary_item);
        return;
      case MP4PARSE_STATUS_IMAGE_ITEM_TYPE:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::image_item_type);
        return;
      case MP4PARSE_STATUS_ITEM_TYPE_MISSING:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::item_type_missing);
        return;
      case MP4PARSE_STATUS_CONSTRUCTION_METHOD:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::construction_method);
        return;
      case MP4PARSE_STATUS_ITEM_LOC_NOT_FOUND:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::item_loc_not_found);
        return;
      case MP4PARSE_STATUS_NO_ITEM_DATA_BOX:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::no_item_data_box);
        return;
    }

    MOZ_LOG(sAVIFLog, LogLevel::Error,
            ("[this=%p] unexpected Mp4parseStatus value: %d", this,
             aResult.as<Mp4parseStatus>()));
    MOZ_ASSERT(false, "unexpected Mp4parseStatus value");
    AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::invalid_parse_status);

  } else if (aResult.is<NonDecoderResult>()) {
    switch (aResult.as<NonDecoderResult>()) {
      case NonDecoderResult::NeedMoreData:
        return;
      case NonDecoderResult::MetadataOk:
        return;
      case NonDecoderResult::NoPrimaryItem:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::no_primary_item);
        return;
      case NonDecoderResult::SizeOverflow:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::size_overflow);
        return;
      case NonDecoderResult::OutOfMemory:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::out_of_memory);
        return;
      case NonDecoderResult::PipeInitError:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::pipe_init_error);
        return;
      case NonDecoderResult::WriteBufferError:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::write_buffer_error);
        return;
      case NonDecoderResult::AlphaYSizeMismatch:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::alpha_y_sz_mismatch);
        return;
      case NonDecoderResult::AlphaYColorDepthMismatch:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::alpha_y_bpc_mismatch);
        return;
      case NonDecoderResult::MetadataImageSizeMismatch:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::ispe_mismatch);
        return;
      case NonDecoderResult::InvalidCICP:
        AccumulateCategorical(LABELS_AVIF_DECODE_RESULT::invalid_cicp);
        return;
    }
    MOZ_ASSERT_UNREACHABLE("unknown NonDecoderResult");
  } else {
    MOZ_ASSERT(aResult.is<Dav1dResult>() || aResult.is<AOMResult>());
    AccumulateCategorical(aResult.is<Dav1dResult>() ? LABELS_AVIF_DECODER::dav1d
                                                    : LABELS_AVIF_DECODER::aom);
    AccumulateCategorical(IsDecodeSuccess(aResult)
                              ? LABELS_AVIF_DECODE_RESULT::success
                              : LABELS_AVIF_DECODE_RESULT::decode_error);
  }
}

Maybe<Telemetry::HistogramID> nsAVIFDecoder::SpeedHistogram() const {
  return Some(Telemetry::IMAGE_DECODE_SPEED_AVIF);
}

}  // namespace image
}  // namespace mozilla