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Yandex text-to-speech FastAGI server for Asterisk
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| /* | |
| * System requirements: | |
| * - lame | |
| * - sox | |
| * | |
| * Usage: | |
| * exten => ...,AGI(agi://localhost:3000/?text=${URIENCODE(Hello, world)}) | |
| */ | |
| 'use strict'; | |
| const AgiServer = require('ding-dong'); | |
| const Promise = require('bluebird'); | |
| const fs = Promise.promisifyAll(require('fs')); | |
| const tts = Promise.promisify(require('yandex-speech').TTS); | |
| const querystring = require('querystring'); | |
| const crypto = require('crypto'); | |
| const spawn = require('child_process').spawn; | |
| function handler (context) { | |
| Promise.resolve(context.onEvent('variables')) | |
| .bind({}) | |
| .then(function (vars) { | |
| const qs = vars.agi_network_script.split('?')[1]; | |
| this.params = querystring.parse(qs); | |
| const sha1 = crypto.createHash('sha1').update(this.params.text).digest('hex'); | |
| this.fileName = `/tmp/tts-${sha1}`; | |
| this.fileNameWav = this.fileName + '.wav'; | |
| this.fileNameMp3 = this.fileName + '.mp3'; | |
| return fs.accessAsync(this.fileNameWav); | |
| }) | |
| .catch(function () { | |
| const opts = { | |
| text: this.params.text, | |
| file: this.fileNameMp3 | |
| }; | |
| return tts(opts) | |
| .then(() => { | |
| return new Promise((resolve, reject) => { | |
| let cmd = spawn('/bin/sh', ['-c', `lame --decode ${this.fileNameMp3} - | sox -v 0.5 -t wav - -t wav -b 16 -r 8000 -c 1 ${this.fileNameWav}`]); | |
| cmd.on('close', resolve); | |
| }); | |
| }); | |
| }) | |
| .then(function () { | |
| return context.streamFile(this.fileName); | |
| }) | |
| .then(function () { | |
| return context.end(); | |
| }); | |
| } | |
| var agi = new AgiServer(handler); | |
| agi.start(3000); |
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