lamejs
captureSystemAudio
lamejs | captureSystemAudio | |
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5 | 46 | |
782 | 39 | |
- | - | |
0.0 | 2.8 | |
6 months ago | about 2 months ago | |
JavaScript | JavaScript | |
GNU General Public License v3.0 or later | - |
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lamejs
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Having trouble understanding Int32Array , Int8Array etc;
const channels = [ new Float32Array(441), new Float32Array(441), ]; for (let i = 0, j = 0, n = 1; i < int16.length; i++) { const int = int16[i]; // If the high bit is on, then it is a negative number, and actually counts backwards. const float = int >= 0x8000 ? -(0x10000 - int) / 0x8000 : int / 0x7fff; // Deinterleave channels[(n = ++n % 2)][!n ? j++ : j - 1] = float; } // https://github.com/zhuker/lamejs/commit/e18447fefc4b581e33a89bd6a51a4fbf1b3e1660 const left = channels.shift(); const right = channels.shift(); let leftChannel, rightChannel; if (this.mimeType.includes('mp3')) { const sampleBlockSize = 441; leftChannel = new Int32Array(left.length); rightChannel = new Int32Array(right.length); for (let i = 0; i < left.length; i++) { leftChannel[i] = left[i] < 0 ? left[i] * 32768 : left[i] * 32767; rightChannel[i] = right[i] < 0 ? right[i] * 32768 : right[i] * 32767; } }
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Need help with ytdl-core and ExpressJS
`` async importEncoder() { if (this.mimeType.includes('mp3')) { const { lamejs } = await import(${this.src.origin}/lame.min.js`); this.mp3encoder = new lamejs.Mp3Encoder(2, 44100, 256); this.mp3controller = void 0; return this.mp3stream = new ReadableStream({ start: (_) => { return (this.mp3controller = _); }, }); } // ... } // ... write: async ({ timestamp }) => { const int8 = new Int8Array(441 * 4); const { value, done } = await this.inputReader.read(); if (!done) { int8.set(new Int8Array(value)); } else { console.log({ done }); return this.audioWriter.closed; } const int16 = new Int16Array(int8.buffer); // https://stackoverflow.com/a/35248852 const channels = [ new Float32Array(441), new Float32Array(441), ]; for (let i = 0, j = 0, n = 1; i < int16.length; i++) { const int = int16[i]; // If the high bit is on, then it is a negative number, and actually counts backwards. const float = int >= 0x8000 ? -(0x10000 - int) / 0x8000 : int / 0x7fff; // Deinterleave channels[(n = ++n % 2)][!n ? j++ : j - 1] = float; } // https://github.com/zhuker/lamejs/commit/e18447fefc4b581e33a89bd6a51a4fbf1b3e1660 const left = channels.shift(); const right = channels.shift(); let leftChannel, rightChannel; if (this.mimeType.includes('mp3')) { const sampleBlockSize = 441; leftChannel = new Int32Array(left.length); rightChannel = new Int32Array(right.length); for (let i = 0; i < left.length; i++) { leftChannel[i] = left[i] < 0 ? left[i] * 32768 : left[i] * 32767; rightChannel[i] = right[i] < 0 ? right[i] * 32768 : right[i] * 32767; } } // ... if (this.mimeType.includes('mp3')) { // Finish writing MP3 const mp3buf = this.mp3encoder.flush(); if (mp3buf.length > 0) { this.mp3controller.enqueue(new Uint8Array(mp3buf)); this.mp3controller.close(); } this.resolve(new Response(this.mp3stream).arrayBuffer()); }
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Who uses node executable without using npm?
Read this https://github.com/zhuker/lamejs/blob/master/LICENSE.
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BeReadable - Online Multilingual Audio Transcription and Recorder
Lamejs
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Is it possible to load multiple files and export them as one mp3 file (ToneJS)
Hi, yes, and you don't even need to bring the whole Tone.js lib for that but if you are using it anyway then Tone.Offline is the right thing for this, you get the audiobuffer as output which can be converted to .wav blob. As for .mp3 https://github.com/zhuker/lamejs or any other Lame implementation is worth looking at.
captureSystemAudio
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JavaScript Standard Input/Output: Unspecified
Synchronous. Though non-blocking when we read the message from the browser, execute the command, then stream data output from the local application to the browser piped from QuickJS std.popen(), capture_system_audio.js
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IAMA senior javascript dev, ask me anything
I've already achieved the requirement multiple ways, already; from using Native Messaging https://github.com/guest271314/native-messaging-espeak-ng, to using GNU Core Utilities tail, to Deno.watchFs() https://github.com/guest271314/fs, et al., see captureSystemAudio. The one approach I have not yet achieved is compiling to Emscripten - with SSML support.
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Need help with ytdl-core and ExpressJS
Sure, see https://github.com/guest271314/captureSystemAudio/blob/master/native_messaging/capture_system_audio/background.js, in pertinent part
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Kindly review this C QuickJS HTTP streaming Web server module
This is my second time writing C source code capture_system_audio.c. I got a lot of help doing that, too . I basically implemented the same Native Messaging host algorithm in C, C++, Python, WASI/WebAssembly, and JavaScript (Node.js, QuickJS) which is the programming language I write code most using.
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Termino.js: Create command based apps on any website - great for games, chat-bots, animations and real world apps!
I just fetch the nightly node executable, get rid of everything else in the archive, use .mjs extension for import to work without package.json, then I can connect to the host https://github.com/guest271314/native-messaging-nodejs, and start subprocesses, e.g., raw PCM streams, where stdout is streamed to the client (browser), e.g, https://github.com/guest271314/captureSystemAudio/blob/master/native_messaging/capture_system_audio/capture_system_audio_node.js.
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How to serve exactly 1 HTML file and 1 JavaScript file, then exit the program?
Technically I can just serve the raw data as long as the server is capable of opening creating sub-processes, e.g., using EventSource https://plnkr.co/edit/qX5tepJ38BuDOSZj?preview, in which case I would just need to convert this https://github.com/guest271314/captureSystemAudio/blob/master/native_messaging/capture_system_audio/capture_system_audio.c to accept GET request, read the URL, and send the named event stream to the client.
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[AskJS] Has anybody implemented and compiled ServiceWorker specification to a standalone executable?
Chromium and Chrome refuses to capture monitor devices on Linux. Read this https://github.com/edisionnano/Screenshare-with-audio-on-Discord-with-Linux README and the README at https://github.com/guest271314/captureSystemAudio very carefully. At best you can capture tab audio, not whatever is output to speakears and headphones, in spite of the systemAudio constraints, which is poorly named, and actually misleading.
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[AskJS] Do specification authors and implementers listen to developers in the field?
How is capturing speechSynthesis.speak() a security vector https://github.com/guest271314/captureSystemAudio?
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What chrome extensions are you using in 2023?
Capture audio output to speakers or headphones to MP3 or Opus in WebM https://github.com/guest271314/captureSystemAudio/tree/master/native_messaging/capture_system_audio
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You can learn React and Python in browser without dev environment.
An example of using Native Messaging to capture "What-U-Hear", sound output to speakers and headphone, launching native GUI's https://github.com/guest271314/captureSystemAudio/tree/master/native_messaging/capture_system_audio; an adapter for espeak-ng so we can capture the output of speech synthesis engine and stream output to the browser https://github.com/guest271314/native-messaging-espeak-ng.
What are some alternatives?
vue-audio-visual - VueJS audio visualization components
libdatachannel - C/C++ WebRTC network library featuring Data Channels, Media Transport, and WebSockets
Vue.js - This is the repo for Vue 2. For Vue 3, go to https://github.com/vuejs/core
proposal-do-expressions - Proposal for `do` expressions
be-readable - BeReadable is a simple online tool that helps the user to turn audio into words and it can also record the audio and the user can play it or download it to mp3.
comet - Browser extension to replace Youtube comments with Reddit comments or view the Reddit comments of any webpage.
banned - Banned from a site or organization? Account suspended? Censored? Why?
native-messaging-bash - Bash Native Messaging host.
webextensions-examples - Example Firefox add-ons created using the WebExtensions API
GoogleNetworkSpeechSynthesis - Google's Network Speech Synthesis: Bring your own Google API key and proxy
proposal-type-annotations - ECMAScript proposal for type syntax that is erased - Stage 1
native-messaging-php - Local server