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Using common events

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watsonb8
2020-12-10 14:44:13 -05:00
parent e35c0f5a64
commit 7dc9758147
4 changed files with 118 additions and 78 deletions
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4
package-lock.json generated
View File

@@ -14,6 +14,10 @@
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/child_process/-/child_process-1.0.2.tgz",
"integrity": "sha1-sffn/HPSXn/R1FWtyU4UODAYK1o="
},
"node-common": {
"version": "git+ssh://git@thebword.ddns.net:3122/watsonb8/node-common.git#3ee1400be94851335e822916861ea2eddb9e344f",
"from": "git+ssh://git@thebword.ddns.net:3122/watsonb8/node-common.git"
}
}
}

3
package.json
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@@ -18,7 +18,8 @@
"author": "Brandon Watson",
"license": "ISC",
"dependencies": {
"child_process": "^1.0.2"
"child_process": "^1.0.2",
"node-common": "git+ssh://git@thebword.ddns.net:3122/watsonb8/node-common.git"
},
"devDependencies": {
"@types/node": "^14.14.6"

66
src/index.ts
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@@ -2,11 +2,24 @@ import { ChildProcess, spawn } from "child_process";
import { EventEmitter } from "events";
import { Writable } from "stream";
import { IOptions } from "./options";
import { Event } from "common/events";
const ef1 = "ff";
const ef2 = "d9";
export class Rtsp extends EventEmitter {
export interface IStreamEventArgs {
data: Buffer;
}
export interface ICloseEventArgs {
message: string;
}
export interface IErrorEventArgs {
message?: string;
err?: Error;
}
export class Rtsp {
private _connecteionString: string;
private _childProcess: ChildProcess | undefined;
private _started: boolean;
@@ -14,14 +27,20 @@ export class Rtsp extends EventEmitter {
private _options: IOptions;
private _paused: boolean;
private _dataEvent: Event<this, IStreamEventArgs>;
private _closeEvent: Event<this, ICloseEventArgs>;
private _errorEvent: Event<this, IErrorEventArgs>;
constructor(connectionString: string, options: IOptions) {
super();
this._started = false;
this._connecteionString = connectionString;
this._childProcess = undefined;
this._buffer = Buffer.from("");
this._options = options;
this._paused = false;
this._dataEvent = new Event();
this._closeEvent = new Event();
this._errorEvent = new Event();
this.onData = this.onData.bind(this);
}
@@ -34,6 +53,18 @@ export class Rtsp extends EventEmitter {
return this._paused;
}
public get dataEvent(): Event<this, IStreamEventArgs> {
return this._dataEvent;
}
public get closeEvent(): Event<this, ICloseEventArgs> {
return this._closeEvent;
}
public get errorEvent(): Event<this, IErrorEventArgs> {
return this._errorEvent;
}
public start(): void {
const argStrings = [
`-i ${this._connecteionString}`,
@@ -51,17 +82,24 @@ export class Rtsp extends EventEmitter {
}
this._childProcess.stdout?.on("data", this.onData);
this._childProcess.on("exit", this.onExit);
this._childProcess.on("error", this.onError);
this._childProcess.on("exit", (code: number, signal: NodeJS.Signals) =>
this._closeEvent.fire(this, {
message: "FFmpeg exited with code: " + code + " and signal: " + signal,
})
);
this._childProcess.on("error", (error: Error) =>
this._errorEvent.fire(this, { err: error })
);
if (this._childProcess.stderr) {
// this._childProcess.stderr.on("data", this.onStdErrorData);
//Only register this event if there are subscribers
if (this._childProcess.stderr && this._errorEvent.length > 0) {
this._childProcess.stderr.on("data", this.onStdErrorData);
}
}
public close(): void {
this._childProcess && this._childProcess.kill("SIGKILL");
this.emit("closed");
this._closeEvent.fire(this, { message: "Process killed by user" });
}
public pause(): void {
@@ -76,10 +114,6 @@ export class Rtsp extends EventEmitter {
return this._childProcess ? this._childProcess.stdin : null;
}
private onError = (err: Error): void => {
this.emit("error", new Error("Failed to start stream: " + err.message));
};
private onStdErrorData = (data: any): void => {
if (!this._started) {
this._started = true;
@@ -92,13 +126,7 @@ export class Rtsp extends EventEmitter {
msg += `${line}\n`;
});
this.emit("error", msg);
};
private onExit = (code: number, signal: NodeJS.Signals): void => {
const message =
"FFmpeg exited with code: " + code + " and signal: " + signal;
this.emit("closed", message);
this._errorEvent.fire(this, { message: msg });
};
private onData(data: Buffer): void {
@@ -111,7 +139,7 @@ export class Rtsp extends EventEmitter {
data[data.length - 2].toString(16) == ef1 &&
data[data.length - 1].toString(16) == ef2
) {
this.emit("data", this._buffer);
this._dataEvent.fire(this, { data: this._buffer });
this._buffer = Buffer.from("");
}
}

121
tsconfig.json
View File

@@ -1,60 +1,67 @@
{
"compilerOptions": {
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
// "lib": [], /* Specify library files to be included in the compilation. */
// "allowJs": true, /* Allow javascript files to be compiled. */
// "checkJs": true, /* Report errors in .js files. */
// "jsx": "preserve", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
// "declaration": true, /* Generates corresponding '.d.ts' file. */
// "declarationMap": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */
"sourceMap": true, /* Generates corresponding '.map' file. */
// "outFile": "./", /* Concatenate and emit output to single file. */
"outDir": "./lib", /* Redirect output structure to the directory. */
"rootDir": "./src", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
"composite": true, /* Enable project compilation */
// "tsBuildInfoFile": "./", /* Specify file to store incremental compilation information */
// "removeComments": true, /* Do not emit comments to output. */
// "noEmit": true, /* Do not emit outputs. */
// "importHelpers": true, /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
// "isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
/* Strict Type-Checking Options */
"strict": true, /* Enable all strict type-checking options. */
"noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */
// "strictNullChecks": true, /* Enable strict null checks. */
"strictFunctionTypes": true, /* Enable strict checking of function types. */
// "strictBindCallApply": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
// "strictPropertyInitialization": true, /* Enable strict checking of property initialization in classes. */
// "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */
// "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
/* Additional Checks */
// "noUnusedLocals": true, /* Report errors on unused locals. */
// "noUnusedParameters": true, /* Report errors on unused parameters. */
"noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
"noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
/* Module Resolution Options */
// "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */
// "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */
// "typeRoots": [], /* List of folders to include type definitions from. */
// "types": [], /* Type declaration files to be included in compilation. */
// "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
/* Source Map Options */
// "sourceRoot": "", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
/* Experimental Options */
// "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
// "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
/* Advanced Options */
"forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
"compilerOptions": {
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
"module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
// "lib": [], /* Specify library files to be included in the compilation. */
// "allowJs": true, /* Allow javascript files to be compiled. */
// "checkJs": true, /* Report errors in .js files. */
// "jsx": "preserve", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
// "declaration": true, /* Generates corresponding '.d.ts' file. */
// "declarationMap": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */
"sourceMap": true /* Generates corresponding '.map' file. */,
// "outFile": "./", /* Concatenate and emit output to single file. */
"outDir": "./lib" /* Redirect output structure to the directory. */,
"rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
"composite": true /* Enable project compilation */,
// "tsBuildInfoFile": "./", /* Specify file to store incremental compilation information */
// "removeComments": true, /* Do not emit comments to output. */
// "noEmit": true, /* Do not emit outputs. */
// "importHelpers": true, /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
// "isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
/* Strict Type-Checking Options */
"strict": true /* Enable all strict type-checking options. */,
"noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
// "strictNullChecks": true, /* Enable strict null checks. */
"strictFunctionTypes": true /* Enable strict checking of function types. */,
// "strictBindCallApply": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
// "strictPropertyInitialization": true, /* Enable strict checking of property initialization in classes. */
// "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */
// "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
/* Additional Checks */
// "noUnusedLocals": true, /* Report errors on unused locals. */
// "noUnusedParameters": true, /* Report errors on unused parameters. */
"noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
"noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
/* Module Resolution Options */
// "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
"baseUrl": "./" /* Base directory to resolve non-absolute module names. */,
"paths": {
"common/*": ["./node_modules/node-common/lib/*"]
} /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */,
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */
// "typeRoots": [], /* List of folders to include type definitions from. */
// "types": [], /* Type declaration files to be included in compilation. */
// "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
/* Source Map Options */
// "sourceRoot": "", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
/* Experimental Options */
// "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
// "emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
/* Advanced Options */
"forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
},
"references": [
{
"path": "./node_modules/node-common/tsconfig.json"
}
]
}