retroarch-web Core form

• libretro-cores form [https://buildbot.libretro.com/]

  https://buildbot.libretro.com/nightly/emscripten/

• other-cores

  • [https://github.com/BinBashBanana/webretro]
  • [https://www.emulatorjs.com] this site cores have crc hash key each hours change!.

Module.js

• NengeDisk

  replace FS.mout

  let disk = new NengeDisk(Moudule),path='saves';
  FS.createPath('/', path, !0, !0);
  FS.mount(disk, {}, path);
  
  await disk.mountReady();
  //wait indexDB file => FS file;

  if FS file changge, this file will auto save in indexDB.

• RetroArch Sound Bug in Mobile.

  replace js

  replace(
      /_RWebAudioInit\(latency\)\s?\{/,
      '_RWebAudioInit(latency){Module.latency=latency;'
  ).replace(
      /function\s?_RWebAudioStart\(\)\s?\{/,
      'function _RWebAudioStart() {if(RA.context && RA.context.state != "running") return Module.mobileAudioRun(RA);'
  ).replace(
      /_RWebAudioWrite\(\)\s?\{/,
      '_RWebAudioWrite(buf,size){if(RA.context&&RA.context.state != "running")return Module.mobileAudioRun(RA);\n'
  );
  {
      mobileAudioRun(RA) {
          let M = Module;
          M.pauseMainLoop && M.pauseMainLoop();
          //show some UI to user
          //some event like click  to run==>mobileAudioRest(RA);
      };
      mobileAudioRest(RA) {
          let M = Module;
          RA = RA || M.RA;
          if (RA.context) RA.context.resume();
          if (!RA.context || RA.context.state != 'running') {
              RA.bufIndex = 0;
              RA.bufOffset = 0
              var ac = window["AudioContext"] || window["webkitAudioContext"];
              if (RA.context) {
                  RA.context.close();
                  delete RA.context;
              }
              RA.context = new ac;
              RA.numBuffers = M.latency * RA.context.sampleRate / (1e3 * RA.BUFFER_SIZE) | 0;
              if (RA.numBuffers < 2) RA.numBuffers = 2;
              for (var i = 0; i < RA.numBuffers; i++) {
                  RA.buffers[i] = RA.context.createBuffer(2, RA.BUFFER_SIZE, RA.context.sampleRate);
                  RA.buffers[i].endTime = 0
              }
              RA.nonblock = false;
              RA.startTime = 0;
              RA.context.createGain();
              RA.setStartTime();
              RA.context.resume();
          }
          M.resumeMainLoop();
      }
  }

common.js

• indexDB info in NengeStart.js

  T.DB_NAME = 'RetroArch_WEB';
  T.LibStore = 'data-libjs';
  T.version = 5;
  T.DB_STORE_MAP = {
      'data-rooms': {},
      'data-info': { 'system': false },
      'data-system': {},
      'data-bios': { 'system': false },
      'retroarch': { 'timestamp': false },
      'userdata': { 'timestamp': false },
      'data-libjs': {},
  };

• IndexDB use guide

  let system = Nenge.getStore('data-system');
  await system.get('gambatte_libretro.zip');
  //output {contents:{xxx.js:Uint8Array},system:'gb',filesize: ,filetype: ,timestamp: ,type}
  //if has 'contents' and filesize>0x6400000:gambatte_libretro.zip,gambatte_libretro.zip-part-1,gambatte_libretro.zip-part-2=>contents0,contents1,contents2=>contents
  await system.data('gambatte_libretro.zip');
  //output {xxx.js:Uint8Array}
  system.remove('gambatte_libretro.zip');
  //indexdb remove  gambatte_libretro.zip
  system.put('gambatte_libretro.zip',1);
  //indexdb add  gambatte_libretro.zip=>1
  //if filesize>0x6400000 will add gambatte_libretro.zip,gambatte_libretro.zip-part-1,gambatte_libretro.zip-part-2
  system.setData('gambatte_libretro.zip',1);
  //indexdb add  gambatte_libretro.zip=>{contents:1,timestamp:}
  await system.keys();
  //output ['gambatte_libretro.zip']
  await system.all();
  //output {'gambatte_libretro.zip':{data...}}
  await system.cursor('system',1);
  //output {'gambatte_libretro.zip':{system:'gb'}}
  await system.cursor('system',1,IDBKeyRange.only('gb'));
  //output {'gambatte_libretro.zip':{system:'gb'}}
  await system.cursor('system',1,IDBKeyRange.only('gba'));
  //output {}

• FetchItem

  this is support post

  Nenge.FetchItem({
      url:'gambatte_libretro.zip',//core file
      unpack:true,//if a zip/7z/rar4
      key:'gambatte_libretro.zip',//if null this name will be href name;
      store:'data-system',//if set this,will save or load on IndexDB
      dataOption:{
          system:'gb'//indexDB add save option data
      },
      /* other option */
      get:{k:1},//if set, url=>gambatte_libretro.zip?k=1
      post:Nenge.I.post({'key':1} | [FormElment][FormData] ),//post method
      json:{},//if post a json File Body
      /* end option */
      success(contents){
          if(contents instanceof Uint8Array){
              //base return 
          }else{
              //if a  zip/7z/rar4 and open upack=true
              Nenge.I.toArr(contents,entry=>{
  
              });
          }
      },
      error(text){
      },
      process(status){
          // 0% => 100% download
      }
  
  });
  Nenge.FetchItem({
      url:'xx.json',
      type:'json',
      success(json){
      },
      error(text){
      },
      process(status){
          // 0% => 100% download
      }
  });

• ajax

  this not have indexdb,only use to get page content

  Nenge.ajax({
      url:'xx.json',
      type:'json',
      success(json){
      },
      error(text){
      },
      process(status){
          // 0% => 100% download
      },
      PostProcess(status){
          // 0% => 100% upload
      }
  });