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"""
A Speaker handles audio output from Jasper to the user
Speaker methods:
say - output 'phrase' as speech
play - play the audio in 'filename'
isAvailable - returns True if the platform supports this implementation
"""
import os
import json
class eSpeakSpeaker:
"""
Uses the eSpeak speech synthesizer included in the Jasper disk image
"""
@classmethod
def isAvailable(cls):
return os.system("which espeak") == 0
def say(self, phrase, OPTIONS=" -vdefault+m3 -p 40 -s 160 --stdout > say.wav"):
os.system("espeak " + json.dumps(phrase) + OPTIONS)
self.play("say.wav")
def play(self, filename):
os.system("aplay -D hw:1,0 " + filename)
class saySpeaker:
"""
Uses the OS X built-in 'say' command
"""
@classmethod
def isAvailable(cls):
return os.system("which say") == 0
def shellquote(self, s):
return "'" + s.replace("'", "'\\''") + "'"
def say(self, phrase):
os.system("say " + self.shellquote(phrase))
def play(self, filename):
os.system("afplay " + filename)
def newSpeaker():
"""
Returns:
A speaker implementation available on the current platform
Raises:
ValueError if no speaker implementation is supported on this platform
"""
for cls in [eSpeakSpeaker, saySpeaker]:
if cls.isAvailable():
return cls()
raise ValueError("Platform is not supported")
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