webrtc_H265player/test/prod_decoder/codec/tool/wrapper.js

/********************************************************
Copyright (c) <2019> <copyright ErosZy>

"Anti 996" License Version 1.0 (Draft)

Permission is hereby granted to any individual or legal entity
obtaining a copy of this licensed work (including the source code,
documentation and/or related items, hereinafter collectively referred
to as the "licensed work"), free of charge, to deal with the licensed
work for any purpose, including without limitation, the rights to use,
reproduce, modify, prepare derivative works of, distribute, publish
and sublicense the licensed work, subject to the following conditions:

1. The individual or the legal entity must conspicuously display,
without modification, this License and the notice on each redistributed
or derivative copy of the Licensed Work.

2. The individual or the legal entity must strictly comply with all
applicable laws, regulations, rules and standards of the jurisdiction
relating to labor and employment where the individual is physically
located or where the individual was born or naturalized; or where the
legal entity is registered or is operating (whichever is stricter). In
case that the jurisdiction has no such laws, regulations, rules and
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comply with Core International Labor Standards.

3. The individual or the legal entity shall not induce, suggest or force
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rights or remedies under such laws, regulations, rules and standards
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limit, in any methods, the rights of its employee(s) or independent
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*********************************************************/

const fs = require('fs');
const path = require('path');
const argv = process.argv;
const UglifyJS = require('uglify-js');

const GLUE_PATH = path.join(__dirname, '../combine/glue.js');
const CODEC_PATH = path.join(__dirname, argv[2]);

const glueCodeStr = fs.readFileSync(GLUE_PATH).toString();
const codecCodeStr = fs.readFileSync(CODEC_PATH).toString();

let content = `
var WORKER_ENABLED = !!(window.URL && window.Blob && window.Worker);
function __GET_FUNC_BODY__(funcStr){
    return funcStr.trim().match(
        /^function\\s*\\w*\\s*\\([\\w\\s,]*\\)\\s*{([\\w\\W]*?)}$/
    )[1];
};

function __GLUE_EXEC__(Module){
    ${glueCodeStr};
};

function __CODEC_EXEC__(Module){
    ${codecCodeStr}
};

var H264Codec = null;
if(!WORKER_ENABLED){
    var __codecs__ = [];
    var __codec_id__ = 0;
    function __onmessage__(data) {
        for(var i = 0; i < __codecs__.length; i++) {
            var item = __codecs__[i];
            if(item.id == data.id) {
                data.id = null;
                delete data.id;
                if(!item.destroyed && typeof item.onmessage == "function") {
                    item.onmessage(data);
                }
                break;
            }
        }
    };

    H264Codec = function(){
        var _me = this;
        this.id = __codec_id__++;
        this.destroied = false;
        this.Module = {};
        __GLUE_EXEC__(this.Module);

        this.Module.postMessage = function(data){
            data.id = _me.id;
            __onmessage__(data);
            if(data.type == 'destroy' && typeof _me.onterminate == 'function'){
                _me.onterminate();
                _me.onterminate = null;
                _me.onmessage = null;
                for(var i = __codecs__.length - 1; i >= 0; i--){
                    if(__codecs__[i].id == _me.id){
                        __codecs__.splice(i, 1);
                        break;
                    }
                }
            }
        };

        this.onmessage = function(){};
        this.onterminate = function(){};

        setTimeout(function(){
            __CODEC_EXEC__(_me.Module);
        }, 0);

        __codecs__.push(this);
    };

    H264Codec.prototype.decode = function(buffer){
        if(this.Module){
            this.Module.onmessage({
                data: {
                    type: 'decode',
                    buffer: buffer,
                }
            });
        }
    };

    H264Codec.prototype.destroy = function(){
        this.destroied = true;
        if(this.Module){
            this.Module.onmessage({
                data: { type: 'destroy' }
            });
        }
    };
}else{
    H264Codec = function(){
        var _me = this;
        this.destroied = false;
        var glueCodeStr = __GLUE_EXEC__.toString();
        var codecCodeStr = __CODEC_EXEC__.toString();
        var blob = new Blob([[
            'var Module = {};',
            glueCodeStr, 
            codecCodeStr,
            ';__GLUE_EXEC__(Module);__CODEC_EXEC__(Module);'
        ].join(';')], {type:'text/javascript'});

        this.url = URL.createObjectURL(blob);
        this.worker = new Worker(this.url);
        this.worker.onmessage = function(msg){
            var data = msg.data;
            if(typeof _me.onmessage == "function"){
                _me.onmessage(data);
                if(data.type == 'destroy' && typeof _me.onterminate == 'function'){
                    _me.onterminate();
                    _me.worker.terminate();
                    _me.worker = null;
                }
            }
        }

        this.worker.onterminate = function(){
            
        }

        this.onmessage = function(){};
        this.onterminate = function(){};
    };

    H264Codec.prototype.decode = function(buffer){
        if(this.worker){
            this.worker.postMessage({
                type: 'decode',
                buffer: buffer,
            });
        }
    }

    H264Codec.prototype.destroy = function(){
        this.destroied = true;
        if(this.worker){
            window.URL.revokeObjectURL(this.url);
            this.worker.postMessage({type: 'destroy'});
        }
    }
}

window.H264Codec = H264Codec;
`;

fs.writeFileSync(
  path.join(__dirname, `../combine/prod.${argv[3]}.combine.js`),
  UglifyJS.minify(content).code
);