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692 lines
28 KiB
JavaScript
692 lines
28 KiB
JavaScript
// Copyright (C) 2021 Intel Corporation
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//
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// SPDX-License-Identifier: MIT
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(() => {
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const cvatData = require('cvat-data');
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const PluginRegistry = require('./plugins');
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const serverProxy = require('./server-proxy');
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const { isBrowser, isNode } = require('browser-or-node');
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const { Exception, ArgumentError, DataError } = require('./exceptions');
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// This is the frames storage
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const frameDataCache = {};
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/**
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* Class provides meta information about specific frame and frame itself
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* @memberof module:API.cvat.classes
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* @hideconstructor
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*/
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class FrameData {
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constructor({
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width, height, name, taskID, frameNumber, startFrame, stopFrame, decodeForward,
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}) {
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Object.defineProperties(
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this,
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Object.freeze({
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/**
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* @name filename
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* @type {string}
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* @memberof module:API.cvat.classes.FrameData
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* @readonly
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* @instance
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*/
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filename: {
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value: name,
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writable: false,
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},
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/**
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* @name width
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* @type {integer}
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* @memberof module:API.cvat.classes.FrameData
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* @readonly
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* @instance
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*/
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width: {
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value: width,
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writable: false,
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},
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/**
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* @name height
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* @type {integer}
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* @memberof module:API.cvat.classes.FrameData
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* @readonly
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* @instance
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*/
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height: {
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value: height,
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writable: false,
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},
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tid: {
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value: taskID,
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writable: false,
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},
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/**
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* @name number
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* @type {integer}
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* @memberof module:API.cvat.classes.FrameData
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* @readonly
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* @instance
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*/
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number: {
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value: frameNumber,
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writable: false,
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},
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startFrame: {
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value: startFrame,
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writable: false,
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},
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stopFrame: {
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value: stopFrame,
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writable: false,
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},
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decodeForward: {
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value: decodeForward,
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writable: false,
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},
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}),
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);
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}
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/**
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* Method returns URL encoded image which can be placed in the img tag
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* @method data
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* @returns {string}
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* @memberof module:API.cvat.classes.FrameData
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* @instance
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* @async
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* @param {function} [onServerRequest = () => {}]
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* callback which will be called if data absences local
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* @throws {module:API.cvat.exception.ServerError}
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* @throws {module:API.cvat.exception.PluginError}
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*/
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async data(onServerRequest = () => {}) {
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const result = await PluginRegistry.apiWrapper.call(this, FrameData.prototype.data, onServerRequest);
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return result;
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}
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}
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FrameData.prototype.data.implementation = async function (onServerRequest) {
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return new Promise((resolve, reject) => {
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const resolveWrapper = (data) => {
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this._data = {
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imageData: data,
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renderWidth: this.width,
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renderHeight: this.height,
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};
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return resolve(this._data);
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};
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if (this._data) {
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resolve(this._data);
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return;
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}
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const { provider } = frameDataCache[this.tid];
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const { chunkSize } = frameDataCache[this.tid];
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const start = parseInt(this.number / chunkSize, 10) * chunkSize;
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const stop = Math.min(this.stopFrame, (parseInt(this.number / chunkSize, 10) + 1) * chunkSize - 1);
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const chunkNumber = Math.floor(this.number / chunkSize);
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const onDecodeAll = async (frameNumber) => {
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if (
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frameDataCache[this.tid].activeChunkRequest
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&& chunkNumber === frameDataCache[this.tid].activeChunkRequest.chunkNumber
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) {
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const callbackArray = frameDataCache[this.tid].activeChunkRequest.callbacks;
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for (let i = callbackArray.length - 1; i >= 0; --i) {
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if (callbackArray[i].frameNumber === frameNumber) {
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const callback = callbackArray[i];
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callbackArray.splice(i, 1);
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callback.resolve(await provider.frame(callback.frameNumber));
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}
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}
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if (callbackArray.length === 0) {
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frameDataCache[this.tid].activeChunkRequest = null;
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}
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}
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};
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const rejectRequestAll = () => {
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if (
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frameDataCache[this.tid].activeChunkRequest
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&& chunkNumber === frameDataCache[this.tid].activeChunkRequest.chunkNumber
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) {
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for (const r of frameDataCache[this.tid].activeChunkRequest.callbacks) {
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r.reject(r.frameNumber);
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}
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frameDataCache[this.tid].activeChunkRequest = null;
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}
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};
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const makeActiveRequest = () => {
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const taskDataCache = frameDataCache[this.tid];
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const activeChunk = taskDataCache.activeChunkRequest;
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activeChunk.request = serverProxy.frames
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.getData(this.tid, activeChunk.chunkNumber)
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.then((chunk) => {
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frameDataCache[this.tid].activeChunkRequest.completed = true;
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if (!taskDataCache.nextChunkRequest) {
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provider.requestDecodeBlock(
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chunk,
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taskDataCache.activeChunkRequest.start,
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taskDataCache.activeChunkRequest.stop,
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taskDataCache.activeChunkRequest.onDecodeAll,
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taskDataCache.activeChunkRequest.rejectRequestAll,
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);
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}
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})
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.catch((exception) => {
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if (exception instanceof Exception) {
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reject(exception);
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} else {
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reject(new Exception(exception.message));
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}
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})
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.finally(() => {
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if (taskDataCache.nextChunkRequest) {
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if (taskDataCache.activeChunkRequest) {
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for (const r of taskDataCache.activeChunkRequest.callbacks) {
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r.reject(r.frameNumber);
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}
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}
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taskDataCache.activeChunkRequest = taskDataCache.nextChunkRequest;
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taskDataCache.nextChunkRequest = null;
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makeActiveRequest();
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}
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});
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};
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if (isNode) {
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resolve('Dummy data');
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} else if (isBrowser) {
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provider
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.frame(this.number)
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.then((frame) => {
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if (frame === null) {
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onServerRequest();
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const activeRequest = frameDataCache[this.tid].activeChunkRequest;
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if (!provider.isChunkCached(start, stop)) {
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if (
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!activeRequest
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|| (activeRequest
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&& activeRequest.completed
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&& activeRequest.chunkNumber !== chunkNumber)
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) {
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if (activeRequest && activeRequest.rejectRequestAll) {
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activeRequest.rejectRequestAll();
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}
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frameDataCache[this.tid].activeChunkRequest = {
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request: null,
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chunkNumber,
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start,
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stop,
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onDecodeAll,
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rejectRequestAll,
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completed: false,
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callbacks: [
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{
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resolve: resolveWrapper,
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reject,
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frameNumber: this.number,
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},
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],
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};
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makeActiveRequest();
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} else if (activeRequest.chunkNumber === chunkNumber) {
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if (!activeRequest.onDecodeAll && !activeRequest.rejectRequestAll) {
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activeRequest.onDecodeAll = onDecodeAll;
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activeRequest.rejectRequestAll = rejectRequestAll;
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}
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activeRequest.callbacks.push({
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resolve: resolveWrapper,
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reject,
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frameNumber: this.number,
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});
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} else {
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if (frameDataCache[this.tid].nextChunkRequest) {
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const { callbacks } = frameDataCache[this.tid].nextChunkRequest;
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for (const r of callbacks) {
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r.reject(r.frameNumber);
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}
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}
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frameDataCache[this.tid].nextChunkRequest = {
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request: null,
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chunkNumber,
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start,
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stop,
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onDecodeAll,
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rejectRequestAll,
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completed: false,
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callbacks: [
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{
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resolve: resolveWrapper,
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reject,
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frameNumber: this.number,
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},
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],
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};
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}
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} else {
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activeRequest.callbacks.push({
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resolve: resolveWrapper,
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reject,
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frameNumber: this.number,
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});
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provider.requestDecodeBlock(null, start, stop, onDecodeAll, rejectRequestAll);
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}
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} else {
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if (
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this.number % chunkSize > chunkSize / 4
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&& provider.decodedBlocksCacheSize > 1
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&& this.decodeForward
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&& !provider.isNextChunkExists(this.number)
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) {
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const nextChunkNumber = Math.floor(this.number / chunkSize) + 1;
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if (nextChunkNumber * chunkSize < this.stopFrame) {
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provider.setReadyToLoading(nextChunkNumber);
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const nextStart = nextChunkNumber * chunkSize;
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const nextStop = (nextChunkNumber + 1) * chunkSize - 1;
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if (!provider.isChunkCached(nextStart, nextStop)) {
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if (!frameDataCache[this.tid].activeChunkRequest) {
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frameDataCache[this.tid].activeChunkRequest = {
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request: null,
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chunkNumber: nextChunkNumber,
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start: nextStart,
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stop: nextStop,
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onDecodeAll: null,
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rejectRequestAll: null,
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completed: false,
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callbacks: [],
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};
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makeActiveRequest();
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}
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} else {
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provider.requestDecodeBlock(null, nextStart, nextStop, null, null);
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}
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}
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}
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resolveWrapper(frame);
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}
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})
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.catch((exception) => {
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if (exception instanceof Exception) {
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reject(exception);
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} else {
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reject(new Exception(exception.message));
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}
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});
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}
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});
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};
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function getFrameMeta(taskID, frame) {
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const { meta, mode } = frameDataCache[taskID];
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let size = null;
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if (mode === 'interpolation') {
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[size] = meta.frames;
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} else if (mode === 'annotation') {
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if (frame >= meta.size) {
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throw new ArgumentError(`Meta information about frame ${frame} can't be received from the server`);
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} else {
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size = meta.frames[frame];
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}
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} else {
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throw new DataError(`Invalid mode is specified ${mode}`);
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}
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return size;
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}
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class FrameBuffer {
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constructor(size, chunkSize, stopFrame, taskID) {
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this._size = size;
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this._buffer = {};
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this._contextImage = {};
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this._requestedChunks = {};
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this._chunkSize = chunkSize;
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this._stopFrame = stopFrame;
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this._activeFillBufferRequest = false;
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this._taskID = taskID;
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}
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isContextImageAvailable(frame) {
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return frame in this._contextImage;
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}
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getContextImage(frame) {
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return this._contextImage[frame] || null;
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}
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addContextImage(frame, data) {
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this._contextImage[frame] = data;
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}
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getFreeBufferSize() {
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let requestedFrameCount = 0;
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for (const chunk of Object.values(this._requestedChunks)) {
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requestedFrameCount += chunk.requestedFrames.size;
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}
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return this._size - Object.keys(this._buffer).length - requestedFrameCount;
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}
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requestOneChunkFrames(chunkIdx) {
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return new Promise((resolve, reject) => {
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this._requestedChunks[chunkIdx] = {
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...this._requestedChunks[chunkIdx],
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resolve,
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reject,
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};
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for (const frame of this._requestedChunks[chunkIdx].requestedFrames.entries()) {
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const requestedFrame = frame[1];
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const frameMeta = getFrameMeta(this._taskID, requestedFrame);
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const frameData = new FrameData({
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...frameMeta,
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taskID: this._taskID,
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frameNumber: requestedFrame,
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startFrame: frameDataCache[this._taskID].startFrame,
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stopFrame: frameDataCache[this._taskID].stopFrame,
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decodeForward: false,
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});
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frameData
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.data()
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.then(() => {
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if (
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!(chunkIdx in this._requestedChunks)
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|| !this._requestedChunks[chunkIdx].requestedFrames.has(requestedFrame)
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) {
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reject(chunkIdx);
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} else {
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this._requestedChunks[chunkIdx].requestedFrames.delete(requestedFrame);
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this._requestedChunks[chunkIdx].buffer[requestedFrame] = frameData;
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if (this._requestedChunks[chunkIdx].requestedFrames.size === 0) {
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const bufferedframes = Object.keys(this._requestedChunks[chunkIdx].buffer).map(
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(f) => +f,
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);
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this._requestedChunks[chunkIdx].resolve(new Set(bufferedframes));
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}
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}
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})
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.catch(() => {
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reject(chunkIdx);
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});
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}
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});
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}
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fillBuffer(startFrame, frameStep = 1, count = null) {
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const freeSize = this.getFreeBufferSize();
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const requestedFrameCount = count ? count * frameStep : freeSize * frameStep;
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const stopFrame = Math.min(startFrame + requestedFrameCount, this._stopFrame + 1);
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for (let i = startFrame; i < stopFrame; i += frameStep) {
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const chunkIdx = Math.floor(i / this._chunkSize);
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if (!(chunkIdx in this._requestedChunks)) {
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this._requestedChunks[chunkIdx] = {
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requestedFrames: new Set(),
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resolve: null,
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reject: null,
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buffer: {},
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};
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}
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this._requestedChunks[chunkIdx].requestedFrames.add(i);
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}
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let bufferedFrames = new Set();
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// Need to decode chunks in sequence
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// eslint-disable-next-line no-async-promise-executor
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return new Promise(async (resolve, reject) => {
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for (const chunkIdx in this._requestedChunks) {
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if (Object.prototype.hasOwnProperty.call(this._requestedChunks, chunkIdx)) {
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try {
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const chunkFrames = await this.requestOneChunkFrames(chunkIdx);
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if (chunkIdx in this._requestedChunks) {
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bufferedFrames = new Set([...bufferedFrames, ...chunkFrames]);
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this._buffer = {
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...this._buffer,
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...this._requestedChunks[chunkIdx].buffer,
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};
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delete this._requestedChunks[chunkIdx];
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if (Object.keys(this._requestedChunks).length === 0) {
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resolve(bufferedFrames);
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}
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} else {
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reject(chunkIdx);
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break;
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}
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} catch (error) {
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reject(error);
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break;
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}
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}
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}
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});
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}
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async makeFillRequest(start, step, count = null) {
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if (!this._activeFillBufferRequest) {
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this._activeFillBufferRequest = true;
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try {
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await this.fillBuffer(start, step, count);
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this._activeFillBufferRequest = false;
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} catch (error) {
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if (typeof error === 'number' && error in this._requestedChunks) {
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this._activeFillBufferRequest = false;
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}
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throw error;
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}
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}
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}
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async require(frameNumber, taskID, fillBuffer, frameStep) {
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for (const frame in this._buffer) {
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if (frame < frameNumber || frame >= frameNumber + this._size * frameStep) {
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delete this._buffer[frame];
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}
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}
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this._required = frameNumber;
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const frameMeta = getFrameMeta(taskID, frameNumber);
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let frame = new FrameData({
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...frameMeta,
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taskID,
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frameNumber,
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startFrame: frameDataCache[taskID].startFrame,
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stopFrame: frameDataCache[taskID].stopFrame,
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decodeForward: !fillBuffer,
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});
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if (frameNumber in this._buffer) {
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frame = this._buffer[frameNumber];
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delete this._buffer[frameNumber];
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const cachedFrames = this.cachedFrames();
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if (
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fillBuffer
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&& !this._activeFillBufferRequest
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&& this._size > this._chunkSize
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&& cachedFrames.length < (this._size * 3) / 4
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) {
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const maxFrame = cachedFrames ? Math.max(...cachedFrames) : frameNumber;
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if (maxFrame < this._stopFrame) {
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this.makeFillRequest(maxFrame + 1, frameStep).catch((e) => {
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if (e !== 'not needed') {
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throw e;
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}
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});
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}
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}
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} else if (fillBuffer) {
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this.clear();
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await this.makeFillRequest(frameNumber, frameStep, fillBuffer ? null : 1);
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frame = this._buffer[frameNumber];
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} else {
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this.clear();
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}
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return frame;
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}
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clear() {
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for (const chunkIdx in this._requestedChunks) {
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if (
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Object.prototype.hasOwnProperty.call(this._requestedChunks, chunkIdx)
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&& this._requestedChunks[chunkIdx].reject
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) {
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this._requestedChunks[chunkIdx].reject('not needed');
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}
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}
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this._activeFillBufferRequest = false;
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this._requestedChunks = {};
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this._buffer = {};
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}
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cachedFrames() {
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return Object.keys(this._buffer).map((f) => +f);
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}
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}
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|
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async function getImageContext(taskID, frame) {
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return new Promise((resolve, reject) => {
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serverProxy.frames
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.getImageContext(taskID, frame)
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.then((result) => {
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if (isNode) {
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// eslint-disable-next-line no-undef
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resolve(global.Buffer.from(result, 'binary').toString('base64'));
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} else if (isBrowser) {
|
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const reader = new FileReader();
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reader.onload = () => {
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resolve(reader.result);
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};
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reader.readAsDataURL(result);
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}
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})
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.catch((error) => {
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reject(error);
|
|
});
|
|
});
|
|
}
|
|
|
|
async function getContextImage(taskID, frame) {
|
|
if (frameDataCache[taskID].frameBuffer.isContextImageAvailable(frame)) {
|
|
return frameDataCache[taskID].frameBuffer.getContextImage(frame);
|
|
}
|
|
const response = getImageContext(taskID, frame);
|
|
frameDataCache[taskID].frameBuffer.addContextImage(frame, response);
|
|
return frameDataCache[taskID].frameBuffer.getContextImage(frame);
|
|
}
|
|
|
|
async function getPreview(taskID) {
|
|
return new Promise((resolve, reject) => {
|
|
// Just go to server and get preview (no any cache)
|
|
serverProxy.frames
|
|
.getPreview(taskID)
|
|
.then((result) => {
|
|
if (isNode) {
|
|
// eslint-disable-next-line no-undef
|
|
resolve(global.Buffer.from(result, 'binary').toString('base64'));
|
|
} else if (isBrowser) {
|
|
const reader = new FileReader();
|
|
reader.onload = () => {
|
|
resolve(reader.result);
|
|
};
|
|
reader.readAsDataURL(result);
|
|
}
|
|
})
|
|
.catch((error) => {
|
|
reject(error);
|
|
});
|
|
});
|
|
}
|
|
|
|
async function getFrame(
|
|
taskID,
|
|
chunkSize,
|
|
chunkType,
|
|
mode,
|
|
frame,
|
|
startFrame,
|
|
stopFrame,
|
|
isPlaying,
|
|
step,
|
|
dimension,
|
|
) {
|
|
if (!(taskID in frameDataCache)) {
|
|
const blockType = chunkType === 'video' ? cvatData.BlockType.MP4VIDEO : cvatData.BlockType.ARCHIVE;
|
|
|
|
const meta = await serverProxy.frames.getMeta(taskID);
|
|
const mean = meta.frames.reduce((a, b) => a + b.width * b.height, 0) / meta.frames.length;
|
|
const stdDev = Math.sqrt(
|
|
meta.frames.map((x) => Math.pow(x.width * x.height - mean, 2)).reduce((a, b) => a + b)
|
|
/ meta.frames.length,
|
|
);
|
|
|
|
// limit of decoded frames cache by 2GB
|
|
const decodedBlocksCacheSize = Math.floor(2147483648 / (mean + stdDev) / 4 / chunkSize) || 1;
|
|
|
|
frameDataCache[taskID] = {
|
|
meta,
|
|
chunkSize,
|
|
mode,
|
|
startFrame,
|
|
stopFrame,
|
|
provider: new cvatData.FrameProvider(
|
|
blockType,
|
|
chunkSize,
|
|
Math.max(decodedBlocksCacheSize, 9),
|
|
decodedBlocksCacheSize,
|
|
1,
|
|
dimension,
|
|
),
|
|
frameBuffer: new FrameBuffer(
|
|
Math.min(180, decodedBlocksCacheSize * chunkSize),
|
|
chunkSize,
|
|
stopFrame,
|
|
taskID,
|
|
),
|
|
decodedBlocksCacheSize,
|
|
activeChunkRequest: null,
|
|
nextChunkRequest: null,
|
|
};
|
|
const frameMeta = getFrameMeta(taskID, frame);
|
|
// actual only for video chunks
|
|
frameDataCache[taskID].provider.setRenderSize(frameMeta.width, frameMeta.height);
|
|
}
|
|
|
|
return frameDataCache[taskID].frameBuffer.require(frame, taskID, isPlaying, step);
|
|
}
|
|
|
|
function getRanges(taskID) {
|
|
if (!(taskID in frameDataCache)) {
|
|
return {
|
|
decoded: [],
|
|
buffered: [],
|
|
};
|
|
}
|
|
|
|
return {
|
|
decoded: frameDataCache[taskID].provider.cachedFrames,
|
|
buffered: frameDataCache[taskID].frameBuffer.cachedFrames(),
|
|
};
|
|
}
|
|
|
|
function clear(taskID) {
|
|
if (taskID in frameDataCache) {
|
|
frameDataCache[taskID].frameBuffer.clear();
|
|
delete frameDataCache[taskID];
|
|
}
|
|
}
|
|
|
|
module.exports = {
|
|
FrameData,
|
|
getFrame,
|
|
getRanges,
|
|
getPreview,
|
|
clear,
|
|
getContextImage,
|
|
};
|
|
})();
|