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Merge pull request #800 from GoogleChromeLabs/mozjpeg_dec

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Surma
2020-08-24 14:25:37 +01:00
committed by GitHub
parent 2c923e5239 cd33a2f759
commit 5715fb7b1b
14 changed files with 198 additions and 80 deletions
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2
codecs/mozjpeg_enc/Makefile → codecs/mozjpeg/Makefile
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@ -2,7 +2,7 @@ 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
OUT_JS := enc/mozjpeg_enc.js dec/mozjpeg_dec.js
OUT_WASM := $(OUT_JS:.js=.wasm)
.PHONY: all clean

0
codecs/mozjpeg_enc/README.md → codecs/mozjpeg/README.md
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18
codecs/mozjpeg/dec/example.html Normal file
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@ -0,0 +1,18 @@
<!DOCTYPE html>
<script src="mozjpeg_dec.js"></script>
<script>
const module = mozjpeg_dec({
async onRuntimeInitialized() {
const image = await fetch("./original.jpg").then(r => r.arrayBuffer());
const result = this.decode(image);
const canvas = document.createElement("canvas");
canvas.width = result.width;
canvas.height = result.height;
// Draw image onto canvas
const ctx = canvas.getContext("2d");
ctx.putImageData(result, 0, 0);
document.body.append(canvas);
}
});
</script>

59
codecs/mozjpeg/dec/mozjpeg_dec.cpp Normal file
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@ -0,0 +1,59 @@
#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
auto buffer_lines_available = cinfo.output_height;
while (cinfo.output_scanline < cinfo.output_height) {
uint8_t* ptr = &output_buffer[stride * cinfo.output_scanline];
auto lines_read = jpeg_read_scanlines(&cinfo, &ptr, buffer_lines_available);
buffer_lines_available -= lines_read;
}
jpeg_finish_decompress(&cinfo);
// Step 7: release JPEG compression object
auto data = Uint8ClampedArray.new_(typed_memory_view(output_buffer.size(), output_buffer.data()));
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);
}

69
codecs/mozjpeg/dec/mozjpeg_dec.js Normal file
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@ -0,0 +1,69 @@
var mozjpeg_dec = (function() {
var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
if (typeof __filename !== 'undefined') _scriptDir = _scriptDir || __filename;
return (
function(mozjpeg_dec) {
mozjpeg_dec = mozjpeg_dec || {};
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return mozjpeg_dec.ready
}
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})();
if (typeof exports === 'object' && typeof module === 'object')
module.exports = mozjpeg_dec;
else if (typeof define === 'function' && define['amd'])
define([], function() { return mozjpeg_dec; });
else if (typeof exports === 'object')
exports["mozjpeg_dec"] = mozjpeg_dec;

BIN
codecs/mozjpeg/dec/mozjpeg_dec.wasm Normal file
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Binary file not shown.

0
codecs/mozjpeg_enc/example.html → codecs/mozjpeg/enc/example.html
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28
codecs/mozjpeg_enc/mozjpeg_enc.cpp → codecs/mozjpeg/enc/mozjpeg_enc.cpp
View File

@ -1,10 +1,5 @@
#include <emscripten/bind.h>
#include <emscripten/val.h>
#include <inttypes.h>
#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "jpeglib.h"
@ -14,12 +9,6 @@ extern "C" {
using namespace emscripten;
// MozJPEG doesn’t expose a numeric version, so I have to do some fun C macro
// hackery to turn it into a string. More details here:
// https://gcc.gnu.org/onlinedocs/cpp/Stringizing.html
#define xstr(s) str(s)
#define str(s) #s
struct MozJpegOptions {
int quality;
bool baseline;
@ -39,22 +28,6 @@ struct MozJpegOptions {
int chroma_quality;
};
int version() {
char buffer[] = xstr(MOZJPEG_VERSION);
int version = 0;
int last_index = 0;
for (int i = 0; i < strlen(buffer); i++) {
if (buffer[i] == '.') {
buffer[i] = '\0';
version = version << 8 | atoi(&buffer[last_index]);
buffer[i] = '.';
last_index = i + 1;
}
}
version = version << 8 | atoi(&buffer[last_index]);
return version;
}
thread_local const val Uint8Array = val::global("Uint8Array");
val encode(std::string image_in, int image_width, int image_height, MozJpegOptions opts) {
@ -228,6 +201,5 @@ EMSCRIPTEN_BINDINGS(my_module) {
.field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
.field("chroma_quality", &MozJpegOptions::chroma_quality);
function("version", &version);
function("encode", &encode);
}

0
codecs/mozjpeg_enc/mozjpeg_enc.d.ts → codecs/mozjpeg/enc/mozjpeg_enc.d.ts vendored
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98
codecs/mozjpeg_enc/mozjpeg_enc.js → codecs/mozjpeg/enc/mozjpeg_enc.js
View File

@ -7,56 +7,56 @@ function(mozjpeg_enc) {
mozjpeg_enc = mozjpeg_enc || {};
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d.dynCall_i=function(){return(d.dynCall_i=d.asm.I).apply(null,arguments)};d.dynCall_vi=function(){return(d.dynCall_vi=d.asm.J).apply(null,arguments)};d.dynCall_iii=function(){return(d.dynCall_iii=d.asm.K).apply(null,arguments)};d.dynCall_viii=function(){return(d.dynCall_viii=d.asm.L).apply(null,arguments)};d.dynCall_iiiiii=function(){return(d.dynCall_iiiiii=d.asm.M).apply(null,arguments)};d.dynCall_viiiii=function(){return(d.dynCall_viiiii=d.asm.N).apply(null,arguments)};
d.dynCall_vii=function(){return(d.dynCall_vii=d.asm.O).apply(null,arguments)};d.dynCall_ii=function(){return(d.dynCall_ii=d.asm.P).apply(null,arguments)};d.dynCall_iiiiiii=function(){return(d.dynCall_iiiiiii=d.asm.Q).apply(null,arguments)};d.dynCall_iiiii=function(){return(d.dynCall_iiiii=d.asm.R).apply(null,arguments)};d.dynCall_iiii=function(){return(d.dynCall_iiii=d.asm.S).apply(null,arguments)};d.dynCall_viiiiiiii=function(){return(d.dynCall_viiiiiiii=d.asm.T).apply(null,arguments)};
d.dynCall_viiii=function(){return(d.dynCall_viiii=d.asm.U).apply(null,arguments)};d.dynCall_viiiiiii=function(){return(d.dynCall_viiiiiii=d.asm.V).apply(null,arguments)};d.dynCall_jiji=function(){return(d.dynCall_jiji=d.asm.W).apply(null,arguments)};d.dynCall_viiiiii=function(){return(d.dynCall_viiiiii=d.asm.X).apply(null,arguments)};var Bb;function ia(a){this.name="ExitStatus";this.message="Program terminated with exit("+a+")";this.status=a}P=function Cb(){Bb||Db();Bb||(P=Cb)};
function Db(){function a(){if(!Bb&&(Bb=!0,d.calledRun=!0,!ma)){Ca(Ea);Ca(Fa);aa(d);if(d.onRuntimeInitialized)d.onRuntimeInitialized();if(d.postRun)for("function"==typeof d.postRun&&(d.postRun=[d.postRun]);d.postRun.length;){var b=d.postRun.shift();Ga.unshift(b)}Ca(Ga)}}if(!(0<O)){if(d.preRun)for("function"==typeof d.preRun&&(d.preRun=[d.preRun]);d.preRun.length;)Ha();Ca(Da);0<O||(d.setStatus?(d.setStatus("Running..."),setTimeout(function(){setTimeout(function(){d.setStatus("")},1);a()},1)):a())}}
d.run=Db;if(d.preInit)for("function"==typeof d.preInit&&(d.preInit=[d.preInit]);0<d.preInit.length;)d.preInit.pop()();noExitRuntime=!0;Db();
return mozjpeg_enc.ready

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codecs/mozjpeg_enc/mozjpeg_enc.wasm → codecs/mozjpeg/enc/mozjpeg_enc.wasm
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codecs/mozjpeg_enc/package-lock.json → codecs/mozjpeg/package-lock.json generated
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codecs/mozjpeg_enc/package.json → codecs/mozjpeg/package.json
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4
src/codecs/mozjpeg/encoder.ts
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@ -1,5 +1,5 @@
import mozjpeg_enc, { MozJPEGModule } from '../../../codecs/mozjpeg_enc/mozjpeg_enc';
import wasmUrl from '../../../codecs/mozjpeg_enc/mozjpeg_enc.wasm';
import mozjpeg_enc, { MozJPEGModule } from '../../../codecs/mozjpeg/enc/mozjpeg_enc';
import wasmUrl from '../../../codecs/mozjpeg/enc/mozjpeg_enc.wasm';
import { EncodeOptions } from './encoder-meta';
import { initEmscriptenModule } from '../util';