99 lines
3.8 KiB
JavaScript
99 lines
3.8 KiB
JavaScript
'use strict';
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
|
|
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; }; }();
|
|
|
|
var _stream = require('stream');
|
|
|
|
var _reusePool = require('reuse-pool');
|
|
|
|
var _reusePool2 = _interopRequireDefault(_reusePool);
|
|
|
|
var _webworkifyNode = require('./webworkify-node');
|
|
|
|
var _webworkifyNode2 = _interopRequireDefault(_webworkifyNode);
|
|
|
|
var _encodeWorker = require('./encode-worker');
|
|
|
|
var _encodeWorker2 = _interopRequireDefault(_encodeWorker);
|
|
|
|
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"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var pool = (0, _reusePool2.default)(function () {
|
|
return (0, _webworkifyNode2.default)(_encodeWorker2.default);
|
|
});
|
|
// Prepare first worker
|
|
pool.recycle(pool.get());
|
|
|
|
var EncoderStream = function (_Transform) {
|
|
_inherits(EncoderStream, _Transform);
|
|
|
|
function EncoderStream(codec) {
|
|
_classCallCheck(this, EncoderStream);
|
|
|
|
var _this = _possibleConstructorReturn(this, (EncoderStream.__proto__ || Object.getPrototypeOf(EncoderStream)).call(this, { objectMode: true }));
|
|
|
|
_this._codec = codec;
|
|
|
|
_this._worker = pool.get();
|
|
_this._worker.onmessage = function (msg) {
|
|
if (_this._worker.objectURL) {
|
|
// The object URL can now be revoked as the worker has been loaded
|
|
window.URL.revokeObjectURL(_this._worker.objectURL);
|
|
_this._worker.objectURL = null;
|
|
}
|
|
_this._onMessage(msg.data);
|
|
};
|
|
return _this;
|
|
}
|
|
|
|
_createClass(EncoderStream, [{
|
|
key: '_onMessage',
|
|
value: function _onMessage(data) {
|
|
this.push({
|
|
target: data.target,
|
|
codec: this._codec,
|
|
frame: Buffer.from(data.buffer, data.byteOffset, data.byteLength),
|
|
position: data.position
|
|
});
|
|
}
|
|
}, {
|
|
key: '_transform',
|
|
value: function _transform(chunk, encoding, callback) {
|
|
var buffer = chunk.pcm.slice().buffer;
|
|
this._worker.postMessage({
|
|
action: 'encode' + this._codec,
|
|
target: chunk.target,
|
|
buffer: buffer,
|
|
numberOfChannels: chunk.numberOfChannels,
|
|
position: chunk.position
|
|
}, [buffer]);
|
|
callback();
|
|
}
|
|
}, {
|
|
key: '_flush',
|
|
value: function _flush(callback) {
|
|
this._cleanup();
|
|
callback();
|
|
}
|
|
}, {
|
|
key: '_cleanup',
|
|
value: function _cleanup() {
|
|
this._worker.postMessage({ action: 'reset' });
|
|
pool.recycle(this._worker);
|
|
}
|
|
}]);
|
|
|
|
return EncoderStream;
|
|
}(_stream.Transform);
|
|
|
|
exports.default = EncoderStream; |