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Compile JXL decoder

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Surma
2020-02-06 10:37:36 -08:00
parent 8bf741ed4e
commit ec29c8b8cc
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codecs/jxl_dec/README.md Normal file
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# JPEG XL decoder
- Source: <https://gitlab.com/wg1/jpeg-xl>
- Version: ???
## Example
See `example.html`
## API
### `RawImage decode(std::string buffer)`
Decodes the given avif buffer into raw RGBA. `RawImage` is a class with 3 fields: `buffer`, `width`, and `height`.
### `void free_result()`
Frees the result created by `decode()`.

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codecs/jxl_dec/build.sh Executable file
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#!/bin/bash
set -e
export OPTIMIZE="-Os"
export LDFLAGS="${OPTIMIZE}"
export CFLAGS="${OPTIMIZE}"
export CPPFLAGS="${OPTIMIZE}"
echo "============================================="
echo "Downloading libjxl"
echo "============================================="
test -d node_modules/jxl || (
cd node_modules
git clone --recursive https://gitlab.com/wg1/jpeg-xl.git jxl
)
echo "============================================="
echo "Downloading libjxl done"
echo "============================================="
echo "============================================="
echo "Compiling libjxl"
echo "============================================="
test -n "$SKIP_LIBJXL" || (
cd node_modules/jxl
git submodule update --init --recursive
mkdir -p build
cd build
emcmake cmake ../
emmake make jpegxl-static brunslidec-static brunslicommon-static brunslienc-static
)
echo "============================================="
echo "Compiling libjxl done"
echo "============================================="
echo "============================================="
echo "Compiling wasm bindings"
echo "============================================="
emcc \
${OPTIMIZE} \
--bind \
-s ALLOW_MEMORY_GROWTH=1 \
-s MODULARIZE=1 \
-s 'EXPORT_NAME="jxl_dec"' \
-I ./node_modules/jxl \
-I ./node_modules/jxl/include \
-I ./node_modules/jxl/third_party/highway \
-o ./jxl_dec.js \
-x c++ \
--std=c++11 \
jxl_dec.cpp \
./node_modules/jxl/build/libjpegxl-static.bc \
./node_modules/jxl/build/third_party/brunsli/libbrunslidec-static.bc \
./node_modules/jxl/build/third_party/brunsli/libbrunslicommon-static.bc \
./node_modules/jxl/build/third_party/brotli/libbrotlidec-static.bc \
./node_modules/jxl/build/third_party/brotli/libbrotlicommon-static.bc \
./node_modules/jxl/build/third_party/liblcms2.bc
echo "============================================="
echo "Compiling wasm bindings done"
echo "============================================="
echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
echo "Did you update your docker image?"
echo "Run \`docker pull trzeci/emscripten\`"
echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"

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codecs/jxl_dec/example.html Normal file
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<!doctype html>
<script src='avif_dec.js'></script>
<script>
const Module = avif_dec();
async function loadFile(src) {
const resp = await fetch(src);
return await resp.arrayBuffer();
}
Module.onRuntimeInitialized = async _ => {
const image = await loadFile('../example.avif');
const result = Module.decode(image);
console.log(result.width, result.height, result.buffer);
const imageData = new ImageData(new Uint8ClampedArray(result.buffer), result.width, result.height);
Module.free_result();
const canvas = document.createElement('canvas');
canvas.width = result.width;
canvas.height = result.height;
document.body.appendChild(canvas);
const ctx = canvas.getContext('2d');
ctx.putImageData(imageData, 0, 0);
};
</script>

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codecs/jxl_dec/example.jxl Normal file
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codecs/jxl_dec/jxl_dec.cpp Normal file
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#include <emscripten/bind.h>
#include <emscripten/val.h>
#include "jxl/dec_file.h"
using namespace emscripten;
class RawImage {
public:
val buffer;
int width;
int height;
RawImage(val b, int w, int h) : buffer(b), width(w), height(h) {}
};
val decode(std::string data) {
jxl::Span<const uint8_t> compressed((uint8_t *)data.c_str(), data.length());
jxl::DecompressParams dparams;
// jxl::ThreadPool pool;
jxl::CodecInOut io;
jxl::AuxOut aux_out;
if (!DecodeFile(dparams, compressed, &io, &aux_out, NULL)) {
printf("FAIL\n");
}
printf("YAY\n");
return val(1);
}
EMSCRIPTEN_BINDINGS(my_module) {
class_<RawImage>("RawImage")
.property("buffer", &RawImage::buffer)
.property("width", &RawImage::width)
.property("height", &RawImage::height);
function("decode", &decode);
}

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codecs/jxl_dec/jxl_dec.d.ts vendored Normal file
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interface RawImage {
buffer: Uint8Array;
width: number;
height: number;
}
interface AVIFModule extends EmscriptenWasm.Module {
decode(data: BufferSource): RawImage;
free_result(): void;
}
export default function(opts: EmscriptenWasm.ModuleOpts): AVIFModule;

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codecs/jxl_dec/package.json Normal file
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{
"name": "jxl_dec",
"scripts": {
"install": "napa",
"build": "docker run --rm -v $(pwd):/src trzeci/emscripten ./build.sh"
},
"napa": {
},
"devDependencies": {
"napa": "3.0.0"
}
}