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perf(encoder): naive parallel frame process

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wryk 2019-03-13 20:40:53 +01:00
parent 8748502ee8
commit 3229a00604
6 changed files with 185 additions and 182 deletions
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5
.babelrc Normal file
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@ -0,0 +1,5 @@
{
"plugins": [
["@babel/plugin-transform-runtime"]
]
}

1
babel.config.js
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@ -1 +0,0 @@
module.exports = {}

227
package-lock.json generated
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@ -339,43 +339,6 @@
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"@babel/helper-regex": "^7.0.0", "@babel/helper-regex": "^7.0.0",
"regexpu-core": "^4.2.0" "regexpu-core": "^4.2.0"
},
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"dev": true
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@ -514,43 +477,6 @@
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@ -708,17 +634,18 @@
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} }
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@ -777,43 +704,6 @@
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"regexpu-core": "^4.1.3" "regexpu-core": "^4.1.3"
},
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}, },
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@ -865,26 +755,12 @@
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},
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"dev": true,
"requires": {
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"electron-to-chromium": "^1.3.113",
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}
}
} }
}, },
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@ -892,8 +768,7 @@
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} }
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@ -5570,12 +5445,11 @@
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@ -5585,6 +5459,15 @@
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@ -5592,6 +5475,13 @@
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@ -6516,6 +6406,11 @@
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"dev": true "dev": true
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@ -6667,9 +6562,9 @@
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@ -6681,6 +6576,15 @@
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5
package.json
View file

@ -9,14 +9,19 @@
"lint-fix": "eslint --ext .js,vue . --fix" "lint-fix": "eslint --ext .js,vue . --fix"
}, },
"dependencies": { "dependencies": {
"@babel/runtime": "^7.3.4",
"eventemitter3": "^3.1.0", "eventemitter3": "^3.1.0",
"gif-writer": "^0.9.3", "gif-writer": "^0.9.3",
"objectFitPolyfill": "^2.1.1", "objectFitPolyfill": "^2.1.1",
"p-limit": "^2.2.0",
"postcss-modules": "^1.4.1", "postcss-modules": "^1.4.1",
"promises-progress": "^1.0.3",
"vue": "^2.6.6", "vue": "^2.6.6",
"vuex": "^3.0.1" "vuex": "^3.0.1"
}, },
"devDependencies": { "devDependencies": {
"@babel/core": "^7.3.4",
"@babel/plugin-transform-runtime": "^7.3.4",
"@vue/component-compiler-utils": "^2.6.0", "@vue/component-compiler-utils": "^2.6.0",
"autoprefixer": "^9.4.10", "autoprefixer": "^9.4.10",
"eslint": "^5.15.1", "eslint": "^5.15.1",

81
src/services/encode.worker.js
View file

@ -1,10 +1,9 @@
import { import { GifWriter } from 'gif-writer'
GifWriter, import pLimit from 'p-limit'
MedianCutColorReducer,
IndexedColorImage
} from 'gif-writer'
onmessage = (event) => { onmessage = handleMessage
async function handleMessage (event) {
const { imageDataList, imageWidth, imageHeight, paletteSize, delayTime } = event.data const { imageDataList, imageWidth, imageHeight, paletteSize, delayTime } = event.data
const outputStream = new OutputStream() const outputStream = new OutputStream()
@ -21,15 +20,24 @@ onmessage = (event) => {
writer.writeLoopControlInfo(0) writer.writeLoopControlInfo(0)
const indexedColorImages = imageDataList.map((imageData, index, { length }) => { console.time('quantization')
const indexedColorImage = imageDataToIndexedColorImage(imageData, paletteSize)
postProgressMessage(calcProgress(0, 0.9, length, index + 1)) const limit = pLimit(8)
return indexedColorImage
const promises = imageDataList
.map(imageData => limit(() => convertImageDataToIndexedColorImage(imageData, paletteSize)))
const progressPromises = promisesProgress(promises, function (value) {
postProgressMessage(calcProgress(0, 0.9, value))
}) })
const indexedColorImages = await Promise.all(progressPromises)
console.timeEnd('quantization')
indexedColorImages.forEach((indexedColorImage, index, { length }) => { indexedColorImages.forEach((indexedColorImage, index, { length }) => {
writer.writeTableBasedImageWithGraphicControl(indexedColorImage, { delayTimeInMS: delayTime }) writer.writeTableBasedImageWithGraphicControl(indexedColorImage, { delayTimeInMS: delayTime })
postProgressMessage(calcProgress(0.9, 1, length, index + 1)) postProgressMessage(calcProgress(0.9, 1, (index + 1) / length))
}) })
writer.writeTrailer() writer.writeTrailer()
@ -51,29 +59,40 @@ class OutputStream {
} }
} }
function imageDataToIndexedColorImage (imageData, paletteSize) { function promisesProgress (promises, progress) {
var reducer = new MedianCutColorReducer(imageData, paletteSize) let complete = 0
var paletteData = reducer.process()
var dat = Array.prototype.slice.call(imageData.data)
var indexedColorImageData = [] return promises.map(p => {
return p.then(x => {
for (var idx = 0, len = dat.length; idx < len; idx += 4) { progress(++complete / promises.length)
var d = dat.slice(idx, idx + 4) // r,g,b,a return p
indexedColorImageData.push(reducer.map(d[0], d[1], d[2])) })
} })
return new IndexedColorImage(
{
width: imageData.width,
height: imageData.height
},
indexedColorImageData,
paletteData
)
} }
function calcProgress (from, to, steps, current) { function convertImageDataToIndexedColorImage (imageData, paletteSize) {
return new Promise((resolve, reject) => {
const worker = new Worker('/services/quantize-color.worker.js')
worker.onerror = reject
worker.onmessageerror = reject
worker.onmessage = event => {
resolve(event.data)
}
worker.postMessage({
imageData,
paletteSize
})
})
}
function calcProgress (from, to, value) {
return from + ((to - from) * value)
}
function calcProgress2 (from, to, steps, current) {
return from + ((to - from) / steps * current) return from + ((to - from) / steps * current)
} }

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src/services/quantize-color.worker.js Normal file
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import { MedianCutColorReducer, IndexedColorImage } from 'gif-writer'
onmessage = handleMessage
function handleMessage (event) {
const { imageData, paletteSize } = event.data
const indexedColorImage = convertImageDataToIndexedColorImage(imageData, paletteSize)
postMessage(indexedColorImage)
}
function convertImageDataToIndexedColorImage (imageData, paletteSize) {
const reducer = new MedianCutColorReducer(imageData, paletteSize)
const paletteData = reducer.process()
const data = Array.from(imageData.data)
const indexedColorImageData = []
for (let index = 0, length = data.length; index < length; index += 4) {
const [r, g, b, a] = data.slice(index, index + 4) // r,g,b,a
indexedColorImageData.push(reducer.map(r, g, b))
}
return new IndexedColorImage(
{
width: imageData.width,
height: imageData.height
},
indexedColorImageData,
paletteData
)
}