Angeart Angeart

RFC 1859: Tryトレイト

Start Date: 2017-01-19
RFC: https://rust-lang.github.io/rfcs/1859-try-trait.html
PR: rust-lang/rfcs#1859
Issue: rust-lang/rust#31436

要約

WebAudio+WebSocketでブラウザへの音声リアルタイムストリーミングを実装する

WebRTCでやれよ！と言われそうなところですが、 WebSocket+WebAudioの組み合わせで音声ストリーミングをシンプルに構成する方法を紹介してみます。

サーバーサイド(Node.js + ws + pcm)

サーバーサイドは何でも良いのですが、とりあえずNode.jsでtest.mp3というサンプルファイルをpcmモジュールでデコードし、 wsでクライアントに垂れ流す作りにしておきます。

HLS streaming from node

Provided that you already have a file or stream segmenter generating your .m3u8 playlist and .ts segment files (such as the ffmpeg 'hls' muxer), this little node server will serve up those files to an HLS compatible client (e.g. Safari). If you're using node for your streaming app already, this obviates the need to serve the HLS stream from a separate web server.

loosely based on https://gist.github.com/bnerd/2011232

// loosely based on https://gist.github.com/bnerd/2011232
// requires node.js >= v0.10.0
// assumes that HLS segmenter filename base is 'out'
// and that the HLS playlist and .ts files are in the current directory

	Shader "Hidden/JumpFloodOutline"
	{
	Properties
	{
	_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
	Tags { "PreviewType" = "Plane" }
	Cull Off ZWrite Off ZTest Always

	#!/bin/bash

	# This assumes that the ~6GB mojave installer is in the /Applications folder.
	# If it's not, just open the App Store, search Mojave, and you can download the installer file from there.

	hdiutil create -o /tmp/mojave.cdr -size 6g -layout SPUD -fs HFS+J
	hdiutil attach /tmp/mojave.cdr.dmg -noverify -mountpoint /Volumes/install_mojave
	sudo /Applications/Install\ macOS\ mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/install_mojave
	mv /tmp/mojave.cdr.dmg ~/Desktop/InstallSystem.dmg
	hdiutil detach /Volumes/Install\ macOS\ mojave

	/*
	NOTE: This code assumes a bare git repo in ./bare-git/,
	which should have at least one text file in its root,
	named "greetings.txt".

	This code updates the contents of a "greetings.txt"
	file, and creates a new file called "greetings-XXX.txt"
	(with XXX being a random number). It then creates a new
	commit for these changes. Finally, it reads and dumps
	the new current contents of the repo, file by file.

	// Developed by Tom Kail at Inkle
	// Released under the MIT Licence as held at https://opensource.org/licenses/MIT

	// Must be placed within a folder named "Editor"

	using System;
	using System.Collections.Generic;
	using System.IO;
	using UnityEditor;
	using UnityEngine;

	ACTION
	AD_HOC_CODE_SIGNING_ALLOWED
	ALTERNATE_GROUP
	ALTERNATE_MODE
	ALTERNATE_OWNER
	ALWAYS_SEARCH_USER_PATHS
	ALWAYS_USE_SEPARATE_HEADERMAPS
	APPLE_INTERNAL_DEVELOPER_DIR
	APPLE_INTERNAL_DIR
	APPLE_INTERNAL_DOCUMENTATION_DIR

	/*
	* 日本語入力がOnになっている場合，keyupイベントには日本語入力がOffの場合と同じ値が渡りますが，
	* keydownイベントのkeyCodeの値は常に229になっています．keydownイベントにもキーに応じたkeyCodeが
	* 渡るようにするために，keyupイベントを利用したスクリプトです．
	* Chromeのkeyboardイベントクラス実装では，keyCodeはreadOnlyとなっているため，以下のような方法を用いています．
	* 参照： https://groups.google.com/forum/#!msg/chrome-api-developers-jp/nZgW_c61dvs/YO5dvpk8iREJ
	*/
	function dispatchKeyDown(receivedEvent) {
	var createdEvent = document.createEvent('Event');
	var options = {