// Copyright (c) the JPEG XL Project Authors. All rights reserved. // // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file.
// Macro that defines whether support for decoding JXL files to JPEG is enabled. #ifndef JPEGXL_ENABLE_TRANSCODE_JPEG #define JPEGXL_ENABLE_TRANSCODE_JPEG 1 #endif// JPEGXL_ENABLE_TRANSCODE_JPEG
// Macro that defines whether support for decoding boxes is enabled. #ifndef JPEGXL_ENABLE_BOXES #define JPEGXL_ENABLE_BOXES 1 #endif// JPEGXL_ENABLE_BOXES
namespace jxl { // Some enums and typedefs used by more than one header file.
// Maximum number of passes in an image.
constexpr size_t kMaxNumPasses = 11;
// Maximum number of reference frames.
constexpr size_t kMaxNumReferenceFrames = 4;
enumclass SpeedTier { // Try multiple combinations of Glacier flags for modular mode. Otherwise // like kGlacier.
kTectonicPlate = -1, // Learn a global tree in Modular mode.
kGlacier = 0, // Turns on FindBestQuantizationHQ loop. Equivalent to "guetzli" mode.
kTortoise = 1, // Turns on FindBestQuantization butteraugli loop.
kKitten = 2, // Turns on dots, patches, and spline detection by default, as well as full // context clustering. Default.
kSquirrel = 3, // Turns on error diffusion and full AC strategy heuristics. Equivalent to // "fast" mode.
kWombat = 4, // Turns on gaborish by default, non-default cmap, initial quant field.
kHare = 5, // Turns on simple heuristics for AC strategy, quant field, and clustering; // also enables coefficient reordering.
kCheetah = 6, // Turns off most encoder features. Does context clustering. // Modular: uses fixed tree with Weighted predictor.
kFalcon = 7, // Currently fastest possible setting for VarDCT. // Modular: uses fixed tree with Gradient predictor.
kThunder = 8, // VarDCT: same as kThunder. // Modular: no tree, Gradient predictor, fast histograms
kLightning = 9
};
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