osh-js
Version:
OSH javascript Toolkit
156 lines • 8.57 kB
JavaScript
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