Maison > Article > interface Web > Comment utiliser js pour implémenter la fonction de téléchargement d'enregistrement

Comment utiliser js pour implémenter la fonction de téléchargement d'enregistrement

王林avant: 2020-04-15 09:21:572980parcourir

Le code spécifique est le suivant :

1 page HTML

<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <title id="title"></title>

</head>
<body>
<audio id="player" autoplay controls></audio>
<p>
 <button onclick="start_reco()">开始录音</button>
</p>
<p>
 <button onclick="ai_reco()" style="background-color: cornflowerblue">发送语音指令</button>
</p>
</body>
<script type="application/javascript" src="/static/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="/static/Recorder.js"></script>
<script type="application/javascript">
 var reco = null;
 var audio_context = new AudioContext();//音频内容对象
 navigator.getUserMedia = (navigator.getUserMedia ||
  navigator.webkitGetUserMedia ||
  navigator.mozGetUserMedia ||
  navigator.msGetUserMedia); // 兼容其他浏览器

 navigator.getUserMedia({audio: true}, create_stream, function (err) {
  console.log(err)
 });

 function create_stream(user_media) {
  var stream_input = audio_context.createMediaStreamSource(user_media);
  reco = new Recorder(stream_input);
 }


 function start_reco() {
  reco.record();
 }

 function ai_reco() {
  reco.stop();

  reco.exportWAV(function (wav_file) {
   console.log(wav_file);
   var formdata = new FormData(); // form 表单 {key:value}
   formdata.append("audio", wav_file); // form input type="file"
   $.ajax({
    url: "/receive_audio",
    type: &#39;post&#39;,
    processData: false,
    contentType: false,
    data: formdata,
    dataType: &#39;json&#39;,
    success: function (data) {
     console.log(data);
     document.getElementById("player").src = "/get_audio/" + data.filename;
    }
   })
  });
  reco.clear();
 }

</script>
</html>

(tutoriels associés recommandés : tutoriel js<.>)

2. Contenu Recorder.js

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.Recorder = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module &#39;"+o+"&#39;");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
"use strict";

module.exports = require("./recorder").Recorder;

},{"./recorder":2}],2:[function(require,module,exports){
&#39;use strict&#39;;

var _createClass = (function () {
 function defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
   var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if ("value" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);
  }
 }return function (Constructor, protoProps, staticProps) {
  if (protoProps) defineProperties(Constructor.prototype, protoProps);if (staticProps) defineProperties(Constructor, staticProps);return Constructor;
 };
})();

Object.defineProperty(exports, "__esModule", {
 value: true
});
exports.Recorder = undefined;

var _inlineWorker = require(&#39;inline-worker&#39;);

var _inlineWorker2 = _interopRequireDefault(_inlineWorker);

function _interopRequireDefault(obj) {
 return obj && obj.__esModule ? obj : { default: obj };
}

function _classCallCheck(instance, Constructor) {
 if (!(instance instanceof Constructor)) {
  throw new TypeError("Cannot call a class as a function");
 }
}

var Recorder = exports.Recorder = (function () {
 function Recorder(source, cfg) {
  var _this = this;

  _classCallCheck(this, Recorder);

  this.config = {
   bufferLen: 4096,
   numChannels: 2,
   mimeType: &#39;audio_pcm/wav&#39;
  };
  this.recording = false;
  this.callbacks = {
   getBuffer: [],
   exportWAV: []
  };

  Object.assign(this.config, cfg);
  this.context = source.context;
  this.node = (this.context.createScriptProcessor || this.context.createJavaScriptNode).call(this.context, this.config.bufferLen, this.config.numChannels, this.config.numChannels);

  this.node.onaudioprocess = function (e) {
   if (!_this.recording) return;

   var buffer = [];
   for (var channel = 0; channel < _this.config.numChannels; channel++) {
    buffer.push(e.inputBuffer.getChannelData(channel));
   }
   _this.worker.postMessage({
    command: &#39;record&#39;,
    buffer: buffer
   });
  };

  source.connect(this.node);
  this.node.connect(this.context.destination); //this should not be necessary

  var self = {};
  this.worker = new _inlineWorker2.default(function () {
   var recLength = 0,
    recBuffers = [],
    sampleRate = undefined,
    numChannels = undefined;

   self.onmessage = function (e) {
    switch (e.data.command) {
     case &#39;init&#39;:
      init(e.data.config);
      break;
     case &#39;record&#39;:
      record(e.data.buffer);
      break;
     case &#39;exportWAV&#39;:
      exportWAV(e.data.type);
      break;
     case &#39;getBuffer&#39;:
      getBuffer();
      break;
     case &#39;clear&#39;:
      clear();
      break;
    }
   };

   function init(config) {
    sampleRate = config.sampleRate;
    numChannels = config.numChannels;
    initBuffers();
   }

   function record(inputBuffer) {
    for (var channel = 0; channel < numChannels; channel++) {
     recBuffers[channel].push(inputBuffer[channel]);
    }
    recLength += inputBuffer[0].length;
   }

   function exportWAV(type) {
    var buffers = [];
    for (var channel = 0; channel < numChannels; channel++) {
     buffers.push(mergeBuffers(recBuffers[channel], recLength));
    }
    var interleaved = undefined;
    if (numChannels === 2) {
     interleaved = interleave(buffers[0], buffers[1]);
    } else {
     interleaved = buffers[0];
    }
    var dataview = encodeWAV(interleaved);
    var audioBlob = new Blob([dataview], { type: type });

    self.postMessage({ command: &#39;exportWAV&#39;, data: audioBlob });
   }

   function getBuffer() {
    var buffers = [];
    for (var channel = 0; channel < numChannels; channel++) {
     buffers.push(mergeBuffers(recBuffers[channel], recLength));
    }
    self.postMessage({ command: &#39;getBuffer&#39;, data: buffers });
   }

   function clear() {
    recLength = 0;
    recBuffers = [];
    initBuffers();
   }

   function initBuffers() {
    for (var channel = 0; channel < numChannels; channel++) {
     recBuffers[channel] = [];
    }
   }

   function mergeBuffers(recBuffers, recLength) {
    var result = new Float32Array(recLength);
    var offset = 0;
    for (var i = 0; i < recBuffers.length; i++) {
     result.set(recBuffers[i], offset);
     offset += recBuffers[i].length;
    }
    return result;
   }

   function interleave(inputL, inputR) {
    var length = inputL.length + inputR.length;
    var result = new Float32Array(length);

    var index = 0,
     inputIndex = 0;

    while (index < length) {
     result[index++] = inputL[inputIndex];
     result[index++] = inputR[inputIndex];
     inputIndex++;
    }
    return result;
   }

   function floatTo16BitPCM(output, offset, input) {
    for (var i = 0; i < input.length; i++, offset += 2) {
     var s = Math.max(-1, Math.min(1, input[i]));
     output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
    }
   }

   function writeString(view, offset, string) {
    for (var i = 0; i < string.length; i++) {
     view.setUint8(offset + i, string.charCodeAt(i));
    }
   }

   function encodeWAV(samples) {
    var buffer = new ArrayBuffer(44 + samples.length * 2);
    var view = new DataView(buffer);

    /* RIFF identifier */
    writeString(view, 0, &#39;RIFF&#39;);
    /* RIFF chunk length */
    view.setUint32(4, 36 + samples.length * 2, true);
    /* RIFF type */
    writeString(view, 8, &#39;WAVE&#39;);
    /* format chunk identifier */
    writeString(view, 12, &#39;fmt &#39;);
    /* format chunk length */
    view.setUint32(16, 16, true);
    /* sample format (raw) */
    view.setUint16(20, 1, true);
    /* channel count */
    view.setUint16(22, numChannels, true);
    /* sample rate */
    view.setUint32(24, sampleRate, true);
    /* byte rate (sample rate * block align) */
    view.setUint32(28, sampleRate * 4, true);
    /* block align (channel count * bytes per sample) */
    view.setUint16(32, numChannels * 2, true);
    /* bits per sample */
    view.setUint16(34, 16, true);
    /* data chunk identifier */
    writeString(view, 36, &#39;data&#39;);
    /* data chunk length */
    view.setUint32(40, samples.length * 2, true);

    floatTo16BitPCM(view, 44, samples);

    return view;
   }
  }, self);

  this.worker.postMessage({
   command: &#39;init&#39;,
   config: {
    sampleRate: this.context.sampleRate,
    numChannels: this.config.numChannels
   }
  });

  this.worker.onmessage = function (e) {
   var cb = _this.callbacks[e.data.command].pop();
   if (typeof cb == &#39;function&#39;) {
    cb(e.data.data);
   }
  };
 }

 _createClass(Recorder, [{
  key: &#39;record&#39;,
  value: function record() {
   this.recording = true;
  }
 }, {
  key: &#39;stop&#39;,
  value: function stop() {
   this.recording = false;
  }
 }, {
  key: &#39;clear&#39;,
  value: function clear() {
   this.worker.postMessage({ command: &#39;clear&#39; });
  }
 }, {
  key: &#39;getBuffer&#39;,
  value: function getBuffer(cb) {
   cb = cb || this.config.callback;
   if (!cb) throw new Error(&#39;Callback not set&#39;);

   this.callbacks.getBuffer.push(cb);

   this.worker.postMessage({ command: &#39;getBuffer&#39; });
  }
 }, {
  key: &#39;exportWAV&#39;,
  value: function exportWAV(cb, mimeType) {
   mimeType = mimeType || this.config.mimeType;
   cb = cb || this.config.callback;
   if (!cb) throw new Error(&#39;Callback not set&#39;);

   this.callbacks.exportWAV.push(cb);

   this.worker.postMessage({
    command: &#39;exportWAV&#39;,
    type: mimeType
   });
  }
 }], [{
  key: &#39;forceDownload&#39;,
  value: function forceDownload(blob, filename) {
   var url = (window.URL || window.webkitURL).createObjectURL(blob);
   var link = window.document.createElement(&#39;a&#39;);
   link.href = url;
   link.download = filename || &#39;output.wav&#39;;
   var click = document.createEvent("Event");
   click.initEvent("click", true, true);
   link.dispatchEvent(click);
  }
 }]);

 return Recorder;
})();

exports.default = Recorder;

},{"inline-worker":3}],3:[function(require,module,exports){
"use strict";

module.exports = require("./inline-worker");
},{"./inline-worker":4}],4:[function(require,module,exports){
(function (global){
"use strict";

var _createClass = (function () { function defineProperties(target, props) { for (var key in props) { var prop = props[key]; prop.configurable = true; if (prop.value) prop.writable = true; } Object.defineProperties(target, props); } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };

var WORKER_ENABLED = !!(global === global.window && global.URL && global.Blob && global.Worker);

var InlineWorker = (function () {
 function InlineWorker(func, self) {
 var _this = this;

 _classCallCheck(this, InlineWorker);

 if (WORKER_ENABLED) {
  var functionBody = func.toString().trim().match(/^function\s*\w*\s*\([\w\s,]*\)\s*{([\w\W]*?)}$/)[1];
  var url = global.URL.createObjectURL(new global.Blob([functionBody], { type: "text/javascript" }));

  return new global.Worker(url);
 }

 this.self = self;
 this.self.postMessage = function (data) {
  setTimeout(function () {
  _this.onmessage({ data: data });
  }, 0);
 };

 setTimeout(function () {
  func.call(self);
 }, 0);
 }

 _createClass(InlineWorker, {
 postMessage: {
  value: function postMessage(data) {
  var _this = this;

  setTimeout(function () {
   _this.self.onmessage({ data: data });
  }, 0);
  }
 }
 });

 return InlineWorker;
})();

module.exports = InlineWorker;
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}]},{},[1])(1)
});

3 Méthode d'écriture du flacon

...
@app.route("/")
def index():
 return render_template("index.html")

@app.route("/receive_audio", methods=["POST"])
def receive_audio():
 file = request.files.get("audio")
 if file:
  filepath = os.path.join(BAISE_DIR, "data", "%s.m4a" % uuid4())
  file.save(filepath)

  text = baidu.auido2text(filepath)

  answer = tuling.chat(text)

  res = baidu.text2audio(answer)
  if res.get("err_no") == 200:
   return {"code": 200, "filename": res.get("filename")}

 return {"code": 201, "msg": "上传失败"}


@app.route("/get_audio/<filename>")
def get_audio(filename):
 return send_file(os.path.join(BAISE_DIR, "data", filename))

...

Remarque : l'adresse IP de démarrage du flacon est écrite comme 127.0.0.1, autre. L'adresse js peut signaler une erreur.

Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!

Déclaration：

Cet article est reproduit dans:. en cas de violation, veuillez contacter admin@php.cn Supprimer

Article précédent：Comment obtenir l'effet de générer aléatoirement des divs dans jsArticle suivant：Comment obtenir l'effet de générer aléatoirement des divs dans js

Articles Liés

Voir plus