Add support for Espeak on LInux and OSX

.gitignore

@@ -1 +1,2 @@
+.idea
 node_modules

README.md

@@ -17,7 +17,7 @@ const say = require('say')
 
 // or, override the platform
 const Say = require('say').Say
-const say = new Say('darwin' || 'win32' || 'linux')
+const say = new Say('darwin' || 'win32' || 'linux' || 'espeak')
 
 // Use default system voice and speed
 say.speak('Hello!')

examples/espeak-demo.js

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+const Say = require('..').Say
+const say = new Say('espeak')
+
+let voices = [
+  { voice: 'en-us', text: 'Good  morning', speed: 1 },
+  { voice: 'nb', text: 'God morgen', speed: 1 },
+  { voice: 'en-us', text: 'Good  morning', speed: 2 },
+  { voice: 'nb', text: 'God morgen', speed: 0.5 }
+]
+
+sayIt(0)
+
+say.export('whats up, dog?', 'en-us', 0.5, './exported.wav', (error) => {
+  if (error) {
+    return console.log(error)
+  }
+
+  console.log('export complete')
+})
+
+say.getInstalledVoices((err, voices) => {
+  if (err) {
+    console.error(err)
+  }
+  console.log(voices)
+})
+
+function sayIt (voice) {
+  let v = voices[voice]
+  console.log(v.voice, 'at speed', v.speed)
+
+  say.speak(v.text, v.voice, v.speed, (err) => {
+    voice++
+
+    if (err) {
+      console.error(err)
+    }
+
+    if (voice >= voices.length) {
+      process.exit(0)
+    }
+
+    sayIt(voice)
+  })
+}

index.js

@@ -1,10 +1,12 @@
 const SayLinux = require('./platform/linux.js')
 const SayMacos = require('./platform/darwin.js')
 const SayWin32 = require('./platform/win32.js')
+const SayEspeak = require('./platform/espeak.js')
 
 const MACOS = 'darwin'
 const LINUX = 'linux'
 const WIN32 = 'win32'
+const ESPEAK = 'espeak'
 
 class Say {
   constructor (platform) {
@@ -18,6 +20,8 @@ class Say {
       return new SayLinux()
     } else if (platform === WIN32) {
       return new SayWin32()
+    } else if (platform === ESPEAK) {
+      return new SayEspeak()
     }
 
     throw new Error(`new Say(): unsupported platorm! ${platform}`)

platform/base.js

@@ -5,6 +5,7 @@ class SayPlatformBase {
   constructor () {
     this.child = null
     this.baseSpeed = 0
+    this.voicesSep = '\r\n'
   }
 
   /**
@@ -147,6 +148,10 @@ class SayPlatformBase {
     return Math.ceil(this.baseSpeed * speed)
   }
 
+  filterVoices(voices){
+    return voices
+  }
+
   /**
    * Get Installed voices on system
    * @param {Function} callback A callback of type function(err,voices) to return.
@@ -177,12 +182,12 @@ class SayPlatformBase {
         return callback(new Error(`say.getInstalledVoices(): could not get installed voices, had an error [code: ${code}] [signal: ${signal}]`))
       }
       if (voices.length > 0) {
-        voices = voices.split('\r\n')
+        voices = voices.split(this.voicesSep)
         voices = (voices[voices.length - 1] === '') ? voices.slice(0, voices.length - 1) : voices
       }
       this.child = null
 
-      callback(null, voices)
+      callback(null, this.filterVoices(voices))
     })
 
     this.child.stdin.end()

platform/espeak.js

@@ -0,0 +1,72 @@
+const SayPlatformBase = require('./base.js')
+
+const BASE_SPEED = 175
+const COMMAND = 'espeak'
+
+class SayPlatformEspeak extends SayPlatformBase {
+  constructor () {
+    super()
+    this.baseSpeed = BASE_SPEED
+    this.voicesSep = '\n'
+  }
+
+  buildSpeakCommand ({ text, voice, speed }) {
+    let args = []
+    let pipedData = ''
+    let options = {}
+
+    if (!voice) {
+      args.push(text)
+    } else {
+      args.push('-v', voice, text)
+    }
+
+    if (speed) {
+      args.push('-s', this.convertSpeed(speed))
+    }
+
+    return { command: COMMAND, args, pipedData, options }
+  }
+
+  buildExportCommand ({ text, voice, speed, filename }) {
+    let args = []
+    let pipedData = ''
+    let options = {}
+
+    if (!voice) {
+      args.push(text)
+    } else {
+      args.push('-v', voice, text)
+    }
+
+    if (speed) {
+      args.push('-s', this.convertSpeed(speed))
+    }
+
+    if (filename) {
+      args.push('-w', filename)
+    }
+
+    return { command: COMMAND, args, pipedData, options }
+  }
+
+  runStopCommand () {
+    this.child.stdin.pause()
+    this.child.kill()
+  }
+
+  filterVoices (voices) {
+    return voices.slice(1).map(
+      line => { return line.split(/[ ,]+/)[4] }
+    )
+  }
+
+  getVoices () {
+    let args = []
+    let psCommand = '--voices'
+    args.push(psCommand)
+    return { command: COMMAND, args }
+  }
+}
+
+module.exports = SayPlatformEspeak