45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef LIB_EXTRAS_DEC_JPG_H_
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#define LIB_EXTRAS_DEC_JPG_H_
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// Decodes JPG pixels and metadata in memory.
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#include <stdint.h>
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#include "lib/extras/codec.h"
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#include "lib/extras/dec/color_hints.h"
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#include "lib/jxl/base/data_parallel.h"
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#include "lib/jxl/base/span.h"
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#include "lib/jxl/base/status.h"
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namespace jxl {
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struct SizeConstraints;
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namespace extras {
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bool CanDecodeJPG();
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struct JPGDecompressParams {
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int num_colors = 0;
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bool two_pass_quant = false;
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// 0 = none, 1 = ordered, 2 = Floyd-Steinberg
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int dither_mode = 0;
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};
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// Decodes `bytes` into `ppf`. color_hints are ignored.
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// `elapsed_deinterleave`, if non-null, will be set to the time (in seconds)
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// that it took to deinterleave the raw JSAMPLEs to planar floats.
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Status DecodeImageJPG(Span<const uint8_t> bytes, const ColorHints& color_hints,
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PackedPixelFile* ppf,
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const SizeConstraints* constraints = nullptr,
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const JPGDecompressParams* dparams = nullptr);
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} // namespace extras
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} // namespace jxl
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#endif // LIB_EXTRAS_DEC_JPG_H_
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