Added festival TTS engine

1 files changed, 40 insertions, 0 deletions

diff --git a/client/speaker.py b/client/speaker.py
index 5271459..d41d6ae 100644
--- a/client/speaker.py
+++ b/client/speaker.py
@@ -113,6 +113,46 @@ class eSpeakSpeaker(AbstractSpeaker):
         self.play(fname)
         os.remove(fname)
 
+class festivalSpeaker(AbstractSpeaker):
+    """
+    Uses the festival speech synthesizer
+    Requires festival (text2wave) to be available
+    """
+
+    SLUG = 'festival-tts'
+
+    @classmethod
+    def is_available(cls):
+        if super(festivalSpeaker, cls).is_available() and find_executable('text2wave') is not None and find_executable('festival') is not None:
+            logger = logging.getLogger(__name__)
+            cmd = ['festival', '--pipe']
+            with tempfile.SpooledTemporaryFile() as out_f:
+                with tempfile.SpooledTemporaryFile() as in_f:
+                    logger.debug('Executing %s', ' '.join([pipes.quote(arg) for arg in cmd]))
+                    subprocess.call(cmd, stdin=in_f, stdout=out_f, stderr=out_f)
+                    out_f.seek(0)
+                    output = out_f.read().strip()
+                    if output:
+                        logger.debug("Output was: '%s'", output)
+                    return ('No default voice found' not in output)
+        return False
+
+    def say(self, phrase):
+        self._logger.debug("Saying '%s' with '%s'", phrase, self.SLUG)
+        cmd = ['text2wave']
+        with tempfile.NamedTemporaryFile(suffix='.wav') as out_f:
+            with tempfile.SpooledTemporaryFile() as in_f:
+                in_f.write(phrase)
+                in_f.seek(0)
+                with tempfile.SpooledTemporaryFile() as err_f:
+                    self._logger.debug('Executing %s', ' '.join([pipes.quote(arg) for arg in cmd]))
+                    subprocess.call(cmd, stdin=in_f, stdout=out_f, stderr=err_f)
+                    err_f.seek(0)
+                    output = err_f.read()
+                    if output:
+                        self._logger.debug("Output was: '%s'", output)
+            self.play(out_f.name)
+
 class saySpeaker(AbstractSpeaker):
     """
     Uses the OS X built-in 'say' command