pixi.js/lib/rendering/renderers/shared/texture/sources/VideoSource.mjs.map

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{"version":3,"file":"VideoSource.mjs","sources":["../../../../../../src/rendering/renderers/shared/texture/sources/VideoSource.ts"],"sourcesContent":["// VideoSource.ts\n\nimport { ExtensionType } from '../../../../../extensions/Extensions';\nimport { Ticker } from '../../../../../ticker/Ticker';\nimport { detectVideoAlphaMode } from '../../../../../utils/browser/detectVideoAlphaMode';\nimport { TextureSource } from './TextureSource';\n\nimport type { ExtensionMetadata } from '../../../../../extensions/Extensions';\nimport type { Dict } from '../../../../../utils/types';\nimport type { ALPHA_MODES } from '../const';\nimport type { TextureSourceOptions } from './TextureSource';\n\n/**\n * The type of resource used for video textures.\n * This is typically an HTMLVideoElement.\n * @category rendering\n * @advanced\n */\nexport type VideoResource = HTMLVideoElement;\n\n/**\n * Options for video sources.\n * @category rendering\n * @advanced\n */\nexport interface VideoSourceOptions extends TextureSourceOptions<VideoResource>\n{\n    /** If true, the video will start loading immediately. */\n    autoLoad?: boolean;\n    /** If true, the video will start playing as soon as it is loaded. */\n    autoPlay?: boolean;\n    /** The number of times a second to update the texture from the video. Leave at 0 to update at every render. */\n    updateFPS?: number;\n    /** If true, the video will be loaded with the `crossorigin` attribute. */\n    crossorigin?: boolean | string;\n    /** If true, the video will loop when it ends. */\n    loop?: boolean;\n    /** If true, the video will be muted. */\n    muted?: boolean;\n    /** If true, the video will play inline. */\n    playsinline?: boolean;\n    /** If true, the video will be preloaded. */\n    preload?: boolean;\n    /** The time in milliseconds to wait for the video to preload before timing out. */\n    preloadTimeoutMs?: number;\n    /** The alpha mode of the video. */\n    alphaMode?: ALPHA_MODES;\n}\n\n/**\n * A texture source that uses a video as its resource.\n * It automatically resizes the texture based on the video dimensions.\n * It also provides methods to control playback and handle video events.\n * This class supports automatic loading, playback, and frame updates.\n * It can also handle cross-origin videos and provides options for looping, muting, and inline playback.\n * @category rendering\n * @advanced\n */\nexport class VideoSource extends TextureSource<VideoResource>\n{\n    public static extension: ExtensionMetadata = ExtensionType.TextureSource;\n\n    /** The default options for video sources. */\n    public static defaultOptions: VideoSourceOptions = {\n        ...TextureSource.defaultOptions,\n        /** If true, the video will start loading immediately. */\n        autoLoad: true,\n        /** If true, the video will start playing as soon as it is loaded. */\n        autoPlay: true,\n        /** The number of times a second to update the texture from the video. Leave at 0 to update at every render. */\n        updateFPS: 0,\n        /** If true, the video will be loaded with the `crossorigin` attribute. */\n        crossorigin: true,\n        /** If true, the video will loop when it ends. */\n        loop: false,\n        /** If true, the video will be muted. */\n        muted: true,\n        /** If true, the video will play inline. */\n        playsinline: true,\n        /** If true, the video will be preloaded. */\n        preload: false,\n    };\n\n    // Public\n    /** Whether or not the video is ready to play. */\n    public isReady = false;\n    /** The upload method for this texture. */\n    public uploadMethodId = 'video';\n\n    // Protected\n    /**\n     * When set to true will automatically play videos used by this texture once\n     * they are loaded. If false, it will not modify the playing state.\n     * @default true\n     */\n    protected autoPlay: boolean;\n\n    // Private\n    /**\n     * `true` to use Ticker.shared to auto update the base texture.\n     * @default true\n     */\n    private _autoUpdate: boolean;\n\n    /**\n     * `true` if the instance is currently connected to Ticker.shared to auto update the base texture.\n     * @default false\n     */\n    private _isConnectedToTicker: boolean;\n\n    /**\n     * Promise when loading.\n     * @default null\n     */\n    private _load: Promise<this>;\n\n    private _msToNextUpdate: number;\n    private _preloadTimeout: number;\n\n    /** Callback when completed with load. */\n    private _resolve: (value?: this | PromiseLike<this>) => void;\n    private _reject: (error: ErrorEvent) => void;\n\n    private _updateFPS: number;\n    private _videoFrameRequestCallbackHandle: number | null;\n\n    constructor(\n        options: VideoSourceOptions\n    )\n    {\n        super(options);\n\n        // Merge provided options with default ones\n        options = {\n            ...VideoSource.defaultOptions,\n            ...options\n        };\n\n        this._autoUpdate = true;\n        this._isConnectedToTicker = false;\n        this._updateFPS = options.updateFPS || 0;\n        this._msToNextUpdate = 0;\n        this.autoPlay = options.autoPlay !== false;\n        this.alphaMode = options.alphaMode ?? 'premultiply-alpha-on-upload';\n\n        // Binding for frame updates\n        this._videoFrameRequestCallback = this._videoFrameRequestCallback.bind(this);\n        this._videoFrameRequestCallbackHandle = null;\n\n        this._load = null;\n        this._resolve = null;\n        this._reject = null;\n\n        // Bind for listeners\n        this._onCanPlay = this._onCanPlay.bind(this);\n        this._onCanPlayThrough = this._onCanPlayThrough.bind(this);\n        this._onError = this._onError.bind(this);\n        this._onPlayStart = this._onPlayStart.bind(this);\n        this._onPlayStop = this._onPlayStop.bind(this);\n        this._onSeeked = this._onSeeked.bind(this);\n\n        if (options.autoLoad !== false)\n        {\n            void this.load();\n        }\n    }\n\n    /** Update the video frame if the source is not destroyed and meets certain conditions. */\n    protected updateFrame(): void\n    {\n        if (this.destroyed)\n        {\n            return;\n        }\n\n        if (this._updateFPS)\n        {\n            // Account for if video has had its playbackRate changed\n            const elapsedMS = Ticker.shared.elapsedMS * this.resource.playbackRate;\n\n            this._msToNextUpdate = Math.floor(this._msToNextUpdate - elapsedMS);\n        }\n\n        if (!this._updateFPS || this._msToNextUpdate <= 0)\n        {\n            this._msToNextUpdate = this._updateFPS ? Math.floor(1000 / this._updateFPS) : 0;\n        }\n\n        if (this.isValid)\n        {\n            this.update();\n        }\n    }\n\n    /** Callback to update the video frame and potentially request the next frame update. */\n    private _videoFrameRequestCallback(): void\n    {\n        this.updateFrame();\n\n        if (this.destroyed)\n        {\n            this._videoFrameRequestCallbackHandle = null;\n        }\n        else\n        {\n            this._videoFrameRequestCallbackHandle = this.resource.requestVideoFrameCallback(\n                this._videoFrameRequestCallback\n            );\n        }\n    }\n\n    /**\n     * Checks if the resource has valid dimensions.\n     * @returns {boolean} True if width and height are set, otherwise false.\n     */\n    public get isValid(): boolean\n    {\n        return !!this.resource.videoWidth && !!this.resource.videoHeight;\n    }\n\n    /**\n     * Start preloading the video resource.\n     * @returns {Promise<this>} Handle the validate event\n     */\n    public async load(): Promise<this>\n    {\n        if (this._load)\n        {\n            return this._load;\n        }\n\n        const source = this.resource;\n        const options = this.options as VideoSourceOptions;\n\n        // Check if source data is enough and set it to complete if needed\n        if ((source.readyState === source.HAVE_ENOUGH_DATA || source.readyState === source.HAVE_FUTURE_DATA)\n            && source.width && source.height)\n        {\n            (source as any).complete = true;\n        }\n\n        // Add event listeners related to playback and seeking\n        source.addEventListener('play', this._onPlayStart);\n        source.addEventListener('pause', this._onPlayStop);\n        source.addEventListener('seeked', this._onSeeked);\n\n        // Add or handle source readiness event listeners\n        if (!this._isSourceReady())\n        {\n            if (!options.preload)\n            {\n                // since this event fires early, only bind if not waiting for a preload event\n                source.addEventListener('canplay', this._onCanPlay);\n            }\n            source.addEventListener('canplaythrough', this._onCanPlayThrough);\n            source.addEventListener('error', this._onError, true);\n        }\n        else\n        {\n            // Source is already ready, so handle it immediately\n            this._mediaReady();\n        }\n\n        this.alphaMode = await detectVideoAlphaMode();\n\n        // Create and return the loading promise\n        this._load = new Promise((resolve, reject): void =>\n        {\n            if (this.isValid)\n            {\n                resolve(this);\n            }\n            else\n            {\n                this._resolve = resolve;\n                this._reject = reject;\n\n                if (options.preloadTimeoutMs !== undefined)\n                {\n                    this._preloadTimeout = setTimeout(() =>\n                    {\n                        this._onError(new ErrorEvent(`Preload exceeded timeout of ${options.preloadTimeoutMs}ms`));\n                    }) as unknown as number;\n                }\n                source.load();\n            }\n        });\n\n        return this._load;\n    }\n\n    /**\n     * Handle video error events.\n     * @param event - The error event\n     */\n    private _onError(event: ErrorEvent): void\n    {\n        this.resource.removeEventListener('error', this._onError, true);\n        this.emit('error', event);\n\n        if (this._reject)\n        {\n            this._reject(event);\n            this._reject = null;\n            this._resolve = null;\n        }\n    }\n\n    /**\n     * Checks if the underlying source is playing.\n     * @returns True if playing.\n     */\n    private _isSourcePlaying(): boolean\n    {\n        const source = this.resource;\n\n        return (!source.paused && !source.ended);\n    }\n\n    /**\n     * Checks if the underlying source is ready for playing.\n     * @returns True if ready.\n     */\n    private _isSourceReady(): boolean\n    {\n        const source = this.resource;\n\n        return source.readyState > 2;\n    }\n\n    /** Runs the update loop when the video is ready to play. */\n    private _onPlayStart(): void\n    {\n        // Handle edge case where video might not have received its \"can play\" event yet\n        if (!this.isValid)\n        {\n            this._mediaReady();\n        }\n\n        this._configureAutoUpdate();\n    }\n\n    /** Stops the update loop when a pause event is triggered. */\n    private _onPlayStop(): void\n    {\n        this._configureAutoUpdate();\n    }\n\n    /** Handles behavior when the video completes seeking to the current playback position. */\n    private _onSeeked(): void\n    {\n        if (this._autoUpdate && !this._isSourcePlaying())\n        {\n            this._msToNextUpdate = 0;\n            this.updateFrame();\n            this._msToNextUpdate = 0;\n        }\n    }\n\n    private _onCanPlay(): void\n    {\n        const source = this.resource;\n\n        // Remove event listeners\n        source.removeEventListener('canplay', this._onCanPlay);\n\n        this._mediaReady();\n    }\n\n    private _onCanPlayThrough(): void\n    {\n        const source = this.resource;\n\n        // Remove event listeners\n        source.removeEventListener('canplaythrough', this._onCanPlay);\n\n        if (this._preloadTimeout)\n        {\n            clearTimeout(this._preloadTimeout);\n            this._preloadTimeout = undefined;\n        }\n\n        this._mediaReady();\n    }\n\n    /** Fired when the video is loaded and ready to play. */\n    private _mediaReady(): void\n    {\n        const source = this.resource;\n\n        if (this.isValid)\n        {\n            this.isReady = true;\n            this.resize(source.videoWidth, source.videoHeight);\n        }\n\n        // Reset update timers and perform a frame update\n        this._msToNextUpdate = 0;\n        this.updateFrame();\n        this._msToNextUpdate = 0;\n\n        // Resolve the loading promise if it exists\n        if (this._resolve)\n        {\n            this._resolve(this);\n            this._resolve = null;\n            this._reject = null;\n        }\n\n        // Handle play behavior based on current source status\n        if (this._isSourcePlaying())\n        {\n            this._onPlayStart();\n        }\n        else if (this.autoPlay)\n        {\n            void this.resource.play();\n        }\n    }\n\n    /** Cleans up resources and event listeners associated with this texture. */\n    public destroy()\n    {\n        this._configureAutoUpdate();\n\n        const source = this.resource;\n\n        if (source)\n        {\n            // Remove event listeners\n            source.removeEventListener('play', this._onPlayStart);\n            source.removeEventListener('pause', this._onPlayStop);\n            source.removeEventListener('seeked', this._onSeeked);\n            source.removeEventListener('canplay', this._onCanPlay);\n            source.removeEventListener('canplaythrough', this._onCanPlayThrough);\n            source.removeEventListener('error', this._onError, true);\n\n            // Clear the video source and pause\n            source.pause();\n            source.src = '';\n            source.load();\n        }\n\n        super.destroy();\n    }\n\n    /** Should the base texture automatically update itself, set to true by default. */\n    get autoUpdate(): boolean\n    {\n        return this._autoUpdate;\n    }\n\n    set autoUpdate(value: boolean)\n    {\n        if (value !== this._autoUpdate)\n        {\n            this._autoUpdate = value;\n            this._configureAutoUpdate();\n        }\n    }\n\n    /**\n     * How many times a second to update the texture from the video.\n     * Leave at 0 to update at every render.\n     * A lower fps can help performance, as updating the texture at 60fps on a 30ps video may not be efficient.\n     */\n    get updateFPS(): number\n    {\n        return this._updateFPS;\n    }\n\n    set updateFPS(value: number)\n    {\n        if (value !== this._updateFPS)\n        {\n            this._updateFPS = value;\n            this._configureAutoUpdate();\n        }\n    }\n\n    /**\n     * Configures the updating mechanism based on the current state and settings.\n     *\n     * This method decides between using the browser's native video frame callback or a custom ticker\n     * for updating the video frame. It ensures optimal performance and responsiveness\n     * based on the video's state, playback status, and the desired frames-per-second setting.\n     *\n     * - If `_autoUpdate` is enabled and the video source is playing:\n     *   - It will prefer the native video frame callback if available and no specific FPS is set.\n     *   - Otherwise, it will use a custom ticker for manual updates.\n     * - If `_autoUpdate` is disabled or the video isn't playing, any active update mechanisms are halted.\n     */\n    private _configureAutoUpdate(): void\n    {\n        // Check if automatic updating is enabled and if the source is currently playing\n        if (this._autoUpdate && this._isSourcePlaying())\n        {\n            // Determine if we should use the browser's native video frame callback (generally for better performance)\n            if (!this._updateFPS && this.resource.requestVideoFrameCallback)\n            {\n                // If connected to a custom ticker, remove the update frame function from it\n                if (this._isConnectedToTicker)\n                {\n                    Ticker.shared.remove(this.updateFrame, this);\n                    this._isConnectedToTicker = false;\n                    // Reset the time until the next update\n                    this._msToNextUpdate = 0;\n                }\n\n                // Check if we haven't already requested a video frame callback, and if not, request one\n                if (this._videoFrameRequestCallbackHandle === null)\n                {\n                    this._videoFrameRequestCallbackHandle = this.resource.requestVideoFrameCallback(\n                        this._videoFrameRequestCallback\n                    );\n                }\n            }\n            else\n            {\n                // If a video frame request callback exists, cancel it, as we are switching to manual ticker-based updates\n                if (this._videoFrameRequestCallbackHandle !== null)\n                {\n                    this.resource.cancelVideoFrameCallback(this._videoFrameRequestCallbackHandle);\n                    this._videoFrameRequestCallbackHandle = null;\n                }\n\n                // If not connected to the custom ticker, add the update frame function to it\n                if (!this._isConnectedToTicker)\n                {\n                    Ticker.shared.add(this.updateFrame, this);\n                    this._isConnectedToTicker = true;\n                    // Reset the time until the next update\n                    this._msToNextUpdate = 0;\n                }\n            }\n        }\n        else\n        {\n            // If automatic updating is disabled or the source isn't playing, perform cleanup\n\n            // Cancel any existing video frame callback request\n            if (this._videoFrameRequestCallbackHandle !== null)\n            {\n                this.resource.cancelVideoFrameCallback(this._videoFrameRequestCallbackHandle);\n                this._videoFrameRequestCallbackHandle = null;\n            }\n\n            // Remove the update frame function from the custom ticker\n            if (this._isConnectedToTicker)\n            {\n                Ticker.shared.remove(this.updateFrame, this);\n                this._isConnectedToTicker = false;\n                // Reset the time until the next update\n                this._msToNextUpdate = 0;\n            }\n        }\n    }\n\n    /**\n     * Map of video MIME types that can't be directly derived from file extensions.\n     * @readonly\n     */\n    public static MIME_TYPES: Dict<string>\n        = {\n            ogv: 'video/ogg',\n            mov: 'video/quicktime',\n            m4v: 'video/mp4',\n        };\n\n    public static test(resource: any): resource is VideoResource\n    {\n        return (globalThis.HTMLVideoElement && resource instanceof HTMLVideoElement);\n    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