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-rw-r--r-- | third_party/jpeg-xl/lib/jxl/codec_in_out.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/codec_in_out.h b/third_party/jpeg-xl/lib/jxl/codec_in_out.h new file mode 100644 index 0000000000..9e48b5e937 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/codec_in_out.h @@ -0,0 +1,116 @@ +// 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. + +#ifndef LIB_JXL_CODEC_IN_OUT_H_ +#define LIB_JXL_CODEC_IN_OUT_H_ + +// Holds inputs/outputs for decoding/encoding images. + +#include <stddef.h> +#include <stdint.h> + +#include <type_traits> +#include <utility> +#include <vector> + +#include "lib/jxl/base/data_parallel.h" +#include "lib/jxl/base/status.h" +#include "lib/jxl/common.h" +#include "lib/jxl/frame_header.h" +#include "lib/jxl/headers.h" +#include "lib/jxl/image.h" +#include "lib/jxl/image_bundle.h" +#include "lib/jxl/luminance.h" + +namespace jxl { + +// Optional text/EXIF metadata. +struct Blobs { + std::vector<uint8_t> exif; + std::vector<uint8_t> iptc; + std::vector<uint8_t> jumbf; + std::vector<uint8_t> xmp; +}; + +// Holds a preview, a main image or one or more frames, plus the inputs/outputs +// to/from decoding/encoding. +class CodecInOut { + public: + CodecInOut() : preview_frame(&metadata.m) { + frames.reserve(1); + frames.emplace_back(&metadata.m); + } + + // Move-only. + CodecInOut(CodecInOut&&) = default; + CodecInOut& operator=(CodecInOut&&) = default; + + size_t LastStillFrame() const { + JXL_DASSERT(!frames.empty()); + size_t last = 0; + for (size_t i = 0; i < frames.size(); i++) { + last = i; + if (frames[i].duration > 0) break; + } + return last; + } + + ImageBundle& Main() { return frames[LastStillFrame()]; } + const ImageBundle& Main() const { return frames[LastStillFrame()]; } + + // If c_current.IsGray(), all planes must be identical. + void SetFromImage(Image3F&& color, const ColorEncoding& c_current) { + Main().SetFromImage(std::move(color), c_current); + SetIntensityTarget(&this->metadata.m); + SetSize(Main().xsize(), Main().ysize()); + } + + void SetSize(size_t xsize, size_t ysize) { + JXL_CHECK(metadata.size.Set(xsize, ysize)); + } + + void CheckMetadata() const { + JXL_CHECK(metadata.m.bit_depth.bits_per_sample != 0); + JXL_CHECK(!metadata.m.color_encoding.ICC().empty()); + + if (preview_frame.xsize() != 0) preview_frame.VerifyMetadata(); + JXL_CHECK(preview_frame.metadata() == &metadata.m); + + for (const ImageBundle& ib : frames) { + ib.VerifyMetadata(); + JXL_CHECK(ib.metadata() == &metadata.m); + } + } + + size_t xsize() const { return metadata.size.xsize(); } + size_t ysize() const { return metadata.size.ysize(); } + void ShrinkTo(size_t xsize, size_t ysize) { + // preview is unaffected. + for (ImageBundle& ib : frames) { + ib.ShrinkTo(xsize, ysize); + } + SetSize(xsize, ysize); + } + + // -- DECODER OUTPUT, ENCODER INPUT: + + // Metadata stored into / retrieved from bitstreams. + + Blobs blobs; + + CodecMetadata metadata; // applies to preview and all frames + + // If metadata.have_preview: + ImageBundle preview_frame; + + std::vector<ImageBundle> frames; // size=1 if !metadata.have_animation + + // If the image should be written to a JPEG, use this quality for encoding. + size_t jpeg_quality; +}; + +} // namespace jxl + +#endif // LIB_JXL_CODEC_IN_OUT_H_ |