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MediaInfoOnline.js

A Javascript API works with MediaInfoLib.

Version vom 15.02.2019. Aktuellste Version

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/377671/670848/MediaInfoOnlinejs.js 

// ==UserScript==
// @name         MediaInfoOnline.js
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  A Javascript API works with MediaInfoLib.
// @author       You
// @match        *
// @require      https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js
// @grant        none
// ==/UserScript==
var $ = window.jQuery;
window.MediaInfoOnline = function(input_resource, textarea_mediainfo, input_mediainfo, span_mediainfo, select_format){
    var MediaInfo_lib_instance;
    var result;
    var key;
    var processing = false;
    var keyToParse = 1024 * 1024;
    var cueIn = function(){
        MediaInfo_lib_instance = MediaInfoLib({
            'locateFile': ()=>'',
            'postRun': function(){
                initializeAll();
            }
        });
    };
    var fadeInThenFadeOut = function(span_mediainfo, content, time, color){
        span_mediainfo.text(content).css('color', color).fadeIn(function(){
            $(this).delay(time).fadeOut(function(){
                span_mediainfo.text('');
            });
        });
    }
    var initializeAll = function(){
        $(document).ready(function(){
            var output_formats = JSON.parse(MediaInfo_lib_instance.MediaInfo.Option_Static('Info_OutputFormats_JSON'));
            $.each(output_formats.output, function(e, a){
                select_format.append(
                    $('<option/>', {
                        value: a.name,
                        mime: a.mime
                    }).text(a.desc)
                );
            });
            input_resource.prop('disabled', false);
            DOMEventInit();
        });
    };
    var DOMEventInit = function(){
        input_resource.on('change', function(){
            var input_resource_DOM = $(this)[0];
            if(input_resource_DOM.files.length > 0){
                startParseMediaInfo(input_resource_DOM.files[0]);
            }
        });
        select_format.on('change', function(){
            if(processing){
                input_mediainfo.prop('disabled', true);
                input_mediainfo.attr('value', '稍等');
                regenByType($(this).val(), $(this).find(':selected').attr('mime'));
            }
        });
        input_mediainfo.on('click', function(e){
            e.preventDefault();
            textarea_mediainfo[0].select();
            try{
                var successful = document.execCommand('copy');
                var msg = successful?{'text': '成功', 'color': '#2276BB'}:{'text': '失败', 'color': '#DD8944'};
                fadeInThenFadeOut(span_mediainfo, 'MediaInfo复制' + msg.text, 500, msg.color);
            }
            catch(error){
                fadeInThenFadeOut(span_mediainfo, '无法复制MediaInfo', 500, '#DD8944');
            }
        })
    }
    var regenByType = function(type, mime){
    	result.Option('Inform', 'JSON');
    	window.MediaInfoOnline.json = JSON.parse(result.Inform().trim());
        result.Option('Inform', type);
        input_mediainfo.attr('value', '复制');
        render(mime);
        input_mediainfo.prop('disabled', false);
    };
    var render = function(mime){
        textarea_mediainfo.text(result.Inform().trim());
    };
    var startParseMediaInfo = function(file){
        if(processing){
            processingDone();
        }
        try{
            parseFile(file);
        }
        catch(error){
            alert('Your browser is not compatible.');
        }
    };
    var processingDone = function(){
        result.Close();
        result.delete;
        processing = false;
        input_mediainfo.prop('disabled', false);
        input_mediainfo.attr('value', '复制');
    };
    var parseFile = function(file){
        if(processing){
            return;
        }
        input_mediainfo.prop('disabled', true);
        input_mediainfo.attr('value', '稍等');
        processing = true;
        key = file.name;
        var offset = 0;
        result = new MediaInfo_lib_instance.MediaInfo;
        result.Option('File_FileName', file.name);
        result.Open_Buffer_Init(file.size, 0);
        var seek = function(length){
            if(processing){
                var reader = new FileReader;
                var b = file.slice(offset, offset + length);
                reader.onload = processChunk;
                reader.readAsArrayBuffer(b);
            }
            else{
                processingDone();
            }
        };
        var processChunk = function(event){
            if(event.target.error === null){
                try{
                    var m = result.Open_Buffer_Continue(event.target.result);
                }
                catch(error){
                    processingDone();
                    alert('An error happened reading your file.');
                    return;
                }
                var next_position = result.Open_Buffer_Continue_Goto_Get();
                if(next_position === -1){
                    offset = offset + event.target.result.byteLength;
                }
                else{
                    offset = next_position;
                    result.Open_Buffer_Init(file.size, next_position);
                }
            }
            else{
                processingDone();
                alert('An error happened reading your file.');
                return;
            }
            if(m & 8 || event.target.result.byteLength < 1){
                result.Open_Buffer_Finalize();
                regenByType(select_format.val(), select_format.find(':selected').attr('mime'));
                input_mediainfo.prop('disabled', false);
                input_mediainfo.attr('value', '复制');
                return;
            }
            seek(keyToParse);
        };
        seek(keyToParse);
    };
    return {
        init: cueIn
    };
}