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osh-js

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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); } return new (P || (P = Promise))(function (resolve, reject) { function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); } step((generator = generator.apply(thisArg, _arguments || [])).next()); }); }; var __generator = (this && this.__generator) || function (thisArg, body) { var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; function verb(n) { return function (v) { return step([n, v]); }; } function step(op) { if (f) throw new TypeError("Generator is already executing."); while (g && (g = 0, op[0] && (_ = 0)), _) try { if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; if (y = 0, t) op = [op[0] & 2, t.value]; switch (op[0]) { case 0: case 1: t = op; break; case 4: _.label++; return { value: op[1], done: false }; case 5: _.label++; y = op[1]; op = [0]; continue; case 7: op = _.ops.pop(); _.trys.pop(); continue; default: if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } if (t[2]) _.ops.pop(); _.trys.pop(); continue; } op = body.call(thisArg, _); } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; } }; import OSH from '../ffmpeg/ffmpeg'; import { isDefined } from "../../../utils/Utils"; var FfmpegDecoder = /** @class */ (function () { function FfmpegDecoder(props) { this.codec = props.codec; this.released = false; this.initialized = false; this.initPromise = undefined; this.codecMap = props.codecMap || {}; this.pktDataAllocSize = props.pktDataAllocSize; } FfmpegDecoder.prototype.terminate = function () { }; FfmpegDecoder.prototype.init = function () { return __awaiter(this, void 0, void 0, function () { var _this = this; return __generator(this, function (_a) { if (!this.initPromise) { this.initPromise = new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () { var _a, cod, codec; return __generator(this, function (_b) { switch (_b.label) { case 0: _a = this; return [4 /*yield*/, OSH()]; case 1: _a.Module = _b.sent(); cod = this.codec.toLowerCase(); if (this.codec in this.codecMap) { cod = this.codecMap[this.codec]; } codec = this.Module.ccall('avcodec_find_decoder_by_name', 'number', ['string'], [cod]); if (codec === 0) { console.error("Could not find ".concat(codec, " codec")); } // init codec and conversion context this.av_ctx = this.Module._avcodec_alloc_context3(codec); // this.av_ctx.flags2 |= (1 << 15); // open codec if (this.Module._avcodec_open2(this.av_ctx, codec, 0) < 0) { console.error("Could not initialize codec"); } // allocate packet this.av_pkt = this.Module._malloc(96); this.av_pktData = this.Module._malloc(this.pktDataAllocSize); this.Module._av_init_packet(this.av_pkt); this.Module.setValue(this.av_pkt + 24, this.av_pktData, '*'); // allocate video frame this.av_frame = this.Module._av_frame_alloc(); if (!this.av_frame) { console.error("Could not allocate video frame"); reject("Could not allocate video frame"); } else { console.log('Decoder init OK with codec ' + this.codec.toLowerCase()); this.initialized = true; resolve(); } return [2 /*return*/]; } }); }); }); } return [2 /*return*/, this.initPromise]; }); }); }; FfmpegDecoder.prototype.decode = function (message) { return __awaiter(this, void 0, void 0, function () { var decodedFrame; return __generator(this, function (_a) { switch (_a.label) { case 0: if (message && message === 'release') { this.release(); this.released = true; } if (this.released) { return [2 /*return*/]; } if (!!this.initialized) return [3 /*break*/, 2]; return [4 /*yield*/, this.init()]; case 1: _a.sent(); _a.label = 2; case 2: decodedFrame = this.decodePacket(message.pktSize, new Uint8Array(message.pktData, message.byteOffset, message.pktSize), message.timestamp, message.roll); if (isDefined(decodedFrame)) { decodedFrame.roll = message.roll; } return [2 /*return*/, decodedFrame]; } }); }); }; FfmpegDecoder.prototype.release = function () { this.Module._avcodec_close(this.av_ctx); this.Module._av_free(this.av_ctx); // instance._av_frame_free(self.av_frame); }; FfmpegDecoder.prototype.decodePacket = function (pktSize, pktData, timestamp) { // prepare packet this.Module.setValue(this.av_pkt + 28, pktSize, 'i32'); this.Module.writeArrayToMemory(pktData, this.av_pktData); // decode next frame if (this.Module._avcodec_send_packet(this.av_ctx, this.av_pkt) < 0) { console.warn("Error while sending frame for decoding"); return; } if (this.Module._avcodec_receive_frame(this.av_ctx, this.av_frame) < 0) { console.warn("Error while decoding frame"); return; } return this.handleAvFrame(this.av_frame, pktSize, timestamp); }; // abstract FfmpegDecoder.prototype.handleAvFrame = function (avFrame, pktSize, timestamp) { }; return FfmpegDecoder; }()); export default FfmpegDecoder; //# sourceMappingURL=FfmpegDecoder.js.map