Add node version of MozJPEG encoder & decoder (#886)

* Add node version of MozJPEG

* Update paths for MozJPEG encoder
This commit is contained in:
Surma
2020-12-09 11:44:46 +00:00
committed by GitHub
parent a19e97b2ed
commit 12889d9d50
19 changed files with 284 additions and 1421 deletions

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@ -2,10 +2,10 @@ import { promises as fsp } from 'fs';
import { instantiateEmscriptenWasm, pathify } from './emscripten-utils.js';
// MozJPEG
// import mozEnc from '../../codecs/mozjpeg/enc/mozjpeg_enc.js';
// import mozEncWasm from 'asset-url:../../codecs/mozjpeg/enc/mozjpeg_enc.wasm';
// import mozDec from '../../codecs/mozjpeg/dec/mozjpeg_dec.js';
// import mozDecWasm from 'asset-url:../../codecs/mozjpeg/dec/mozjpeg_dec.wasm';
import mozEnc from '../../codecs/mozjpeg/enc/mozjpeg_node_enc.js';
import mozEncWasm from 'asset-url:../../codecs/mozjpeg/enc/mozjpeg_node_enc.wasm';
import mozDec from '../../codecs/mozjpeg/dec/mozjpeg_node_dec.js';
import mozDecWasm from 'asset-url:../../codecs/mozjpeg/dec/mozjpeg_node_dec.wasm';
// WebP
import webpEnc from '../../codecs/webp/enc/webp_node_enc.js';
@ -195,36 +195,36 @@ export const preprocessors = {
};
export const codecs = {
// mozjpeg: {
// name: "MozJPEG",
// extension: "jpg",
// detectors: [/^\xFF\xD8\xFF/],
// dec: () => instantiateEmscriptenWasm(mozDec, mozDecWasm),
// enc: () => instantiateEmscriptenWasm(mozEnc, mozEncWasm),
// defaultEncoderOptions: {
// quality: 75,
// baseline: false,
// arithmetic: false,
// progressive: true,
// optimize_coding: true,
// smoothing: 0,
// color_space: 3 /*YCbCr*/,
// quant_table: 3,
// trellis_multipass: false,
// trellis_opt_zero: false,
// trellis_opt_table: false,
// trellis_loops: 1,
// auto_subsample: true,
// chroma_subsample: 2,
// separate_chroma_quality: false,
// chroma_quality: 75
// },
// autoOptimize: {
// option: "quality",
// min: 0,
// max: 100
// }
// },
mozjpeg: {
name: 'MozJPEG',
extension: 'jpg',
detectors: [/^\xFF\xD8\xFF/],
dec: () => instantiateEmscriptenWasm(mozDec, mozDecWasm),
enc: () => instantiateEmscriptenWasm(mozEnc, mozEncWasm),
defaultEncoderOptions: {
quality: 75,
baseline: false,
arithmetic: false,
progressive: true,
optimize_coding: true,
smoothing: 0,
color_space: 3 /*YCbCr*/,
quant_table: 3,
trellis_multipass: false,
trellis_opt_zero: false,
trellis_opt_table: false,
trellis_loops: 1,
auto_subsample: true,
chroma_subsample: 2,
separate_chroma_quality: false,
chroma_quality: 75,
},
autoOptimize: {
option: 'quality',
min: 0,
max: 100,
},
},
webp: {
name: 'WebP',
extension: 'webp',

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@ -2,14 +2,22 @@ CODEC_URL := https://github.com/mozilla/mozjpeg/archive/v3.3.1.tar.gz
CODEC_DIR := node_modules/mozjpeg
CODEC_OUT_RELATIVE := .libs/libjpeg.a rdswitch.o
CODEC_OUT := $(addprefix $(CODEC_DIR)/, $(CODEC_OUT_RELATIVE))
OUT_JS := mozjpeg_enc.js
ENVIRONMENT = worker
OUT_JS := enc/mozjpeg_enc.js enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js
OUT_WASM := $(OUT_JS:.js=.wasm)
.PHONY: all clean
all: $(OUT_JS)
%.js: %.cpp $(CODEC_OUT)
# Define dependencies for all variations of build artifacts.
$(filter enc/%,$(OUT_JS)): enc/mozjpeg_enc.cpp
$(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js: ENVIRONMENT = node
%.js: $(CODEC_OUT)
$(CXX) \
-I $(CODEC_DIR) \
${CXXFLAGS} \
@ -19,7 +27,7 @@ all: $(OUT_JS)
-s ALLOW_MEMORY_GROWTH=1 \
-s MODULARIZE=1 \
-s TEXTDECODER=2 \
-s ENVIRONMENT='worker' \
-s ENVIRONMENT=$(ENVIRONMENT) \
-s EXPORT_ES6=1 \
-o $@ \
$+

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@ -0,0 +1,57 @@
#include <emscripten/bind.h>
#include <emscripten/val.h>
#include "config.h"
#include "jpeglib.h"
extern "C" {
#include "cdjpeg.h"
}
using namespace emscripten;
thread_local const val Uint8ClampedArray = val::global("Uint8ClampedArray");
thread_local const val ImageData = val::global("ImageData");
val decode(std::string image_in) {
uint8_t* image_buffer = (uint8_t*)image_in.c_str();
jpeg_decompress_struct cinfo;
jpeg_error_mgr jerr;
// Initialize the JPEG decompression object with default error handling.
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
jpeg_mem_src(&cinfo, image_buffer, image_in.length());
// Read file header, set default decompression parameters
jpeg_read_header(&cinfo, TRUE);
// Force RGBA decoding, even for grayscale images
cinfo.out_color_space = JCS_EXT_RGBA;
jpeg_start_decompress(&cinfo);
// Prepare output buffer
size_t output_size = cinfo.output_width * cinfo.output_height * 4;
std::vector<uint8_t> output_buffer(output_size);
auto stride = cinfo.output_width * 4;
// Process data
while (cinfo.output_scanline < cinfo.output_height) {
uint8_t* ptr = &output_buffer[stride * cinfo.output_scanline];
jpeg_read_scanlines(&cinfo, &ptr, 1);
}
jpeg_finish_decompress(&cinfo);
// Step 7: release JPEG compression object
auto data = Uint8ClampedArray.new_(typed_memory_view(output_size, &output_buffer[0]));
auto js_result = ImageData.new_(data, cinfo.output_width, cinfo.output_height);
// This is an important step since it will release a good deal of memory.
jpeg_destroy_decompress(&cinfo);
// And we're done!
return js_result;
}
EMSCRIPTEN_BINDINGS(my_module) {
function("decode", &decode);
}

58
codecs/mozjpeg/dec/mozjpeg_node_dec.js generated Normal file
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@ -0,0 +1,58 @@
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return Module.ready
}
);
})();
export default Module;

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var Module = (function() {
var _scriptDir = import.meta.url;
return (
function(Module) {
Module = Module || {};
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})();
export default Module;

61
codecs/mozjpeg/enc/mozjpeg_node_enc.js generated Normal file
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return Module.ready
}
);
})();
export default Module;

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{
"name": "mozjpeg_enc",
"scripts": {
"build": "../build-cpp.sh"
}

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@ -1,44 +0,0 @@
# MozJPEG encoder
- Source: <https://github.com/mozilla/mozjpeg>
- Version: v3.3.1
- License: BSD
## Dependencies
- Docker
## Example
See `example.html`
## API
### `int version()`
Returns the version of MozJPEG as a number. va.b.c is encoded as 0x0a0b0c
### `Uint8Array encode(std::string image_in, int image_width, int image_height, MozJpegOptions opts)`
Encodes the given image with given dimension to JPEG. Options looks like this:
```c++
struct MozJpegOptions {
int quality;
bool baseline;
bool arithmetic;
bool progressive;
bool optimize_coding;
int smoothing;
int color_space;
int quant_table;
bool trellis_multipass;
bool trellis_opt_zero;
bool trellis_opt_table;
int trellis_loops;
bool auto_subsample;
int chroma_subsample;
bool separate_chroma_quality;
int chroma_quality;
};
```

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@ -1,51 +0,0 @@
<!DOCTYPE html>
<script type="module">
import mozjpeg_enc from './mozjpeg_enc.js';
async function loadImage(src) {
// Load image
const img = document.createElement('img');
img.src = src;
await new Promise((resolve) => (img.onload = resolve));
// Make canvas same size as image
const canvas = document.createElement('canvas');
[canvas.width, canvas.height] = [img.width, img.height];
// Draw image onto canvas
const ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
return ctx.getImageData(0, 0, img.width, img.height);
}
async function main() {
const module = await mozjpeg_enc();
console.log('Version:', module.version().toString(16));
const image = await loadImage('../example.png');
const result = module.encode(image.data, image.width, image.height, {
quality: 75,
baseline: false,
arithmetic: false,
progressive: true,
optimize_coding: true,
smoothing: 0,
color_space: 3,
quant_table: 3,
trellis_multipass: false,
trellis_opt_zero: false,
trellis_opt_table: false,
trellis_loops: 1,
auto_subsample: true,
chroma_subsample: 2,
separate_chroma_quality: false,
chroma_quality: 75,
});
const blob = new Blob([result], { type: 'image/jpeg' });
const blobURL = URL.createObjectURL(blob);
const img = document.createElement('img');
img.src = blobURL;
document.body.appendChild(img);
}
main();
</script>

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import {
EncodeOptions,
MozJpegColorSpace,
} from 'codecs/mozjpeg_enc/mozjpeg_enc';
} from 'codecs/mozjpeg/enc/mozjpeg_enc';
export { EncodeOptions, MozJpegColorSpace };
export const label = 'MozJPEG';

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@ -10,9 +10,9 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import mozjpeg_enc, { MozJPEGModule } from 'codecs/mozjpeg_enc/mozjpeg_enc';
import mozjpeg_enc, { MozJPEGModule } from 'codecs/mozjpeg/enc/mozjpeg_enc';
import { EncodeOptions } from '../shared/meta';
import wasmUrl from 'url:codecs/mozjpeg_enc/mozjpeg_enc.wasm';
import wasmUrl from 'url:codecs/mozjpeg/enc/mozjpeg_enc.wasm';
import { initEmscriptenModule } from 'features/worker-utils';
let emscriptenModule: Promise<MozJPEGModule>;