Merge pull request #100 from astahlman/master

Platform independent audio output. Stop hardcoding /home/jasper.

1 files changed, 57 insertions, 0 deletions

diff --git a/client/speaker.py b/client/speaker.py
new file mode 100644
index 0000000..1b1255a
--- /dev/null
+++ b/client/speaker.py
@@ -0,0 +1,57 @@
+"""
+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")