Added Google-based TTS plugin

platypush/plugins/tts/google.py

@@ -0,0 +1,94 @@
+import subprocess
+import tempfile
+
+from google.cloud import texttospeech
+
+from platypush.plugins import Plugin, action
+
+class TtsGooglePlugin(Plugin):
+    """
+    Advanced text-to-speech engine that leverages the Google Cloud TTS API.
+    See https://cloud.google.com/text-to-speech/docs/quickstart-client-libraries#client-libraries-install-python
+    for how to enable the API on your account and get your credentials.
+
+    Requires:
+
+        * **google-cloud-texttospeech** - ``pip install google-cloud-texttospeech``
+        * **mplayer** - see your distribution docs on how to install the mplayer package
+    """
+
+    def __init__(self, language='en-US', voice='en-US-Wavenet-C', gender='FEMALE'):
+        """
+        :param language: Language code, see https://cloud.google.com/text-to-speech/docs/basics for supported languages
+        :type language: str
+
+        :param voice: Voice type, see https://cloud.google.com/text-to-speech/docs/basics for supported voices
+        :type voice: str
+
+        :param gender: Voice gender (MALE, FEMALE or NEUTRAL)
+        :type gender: str
+        """
+
+        super().__init__()
+        self.language = language
+        self.voice = voice
+        self.gender = getattr(texttospeech.enums.SsmlVoiceGender, gender.upper())
+
+    @action
+    def say(self, text, language=None, voice=None, gender=None):
+        """
+        Say a phrase
+
+        :param text: Text to say
+        :type text: str
+
+        :param language: Language code override
+        :type language: str
+
+        :param voice: Voice type override
+        :type voice: str
+
+        :param gender: Gender override
+        :type gender: str
+        """
+
+        client = texttospeech.TextToSpeechClient()
+        synthesis_input = texttospeech.types.SynthesisInput(text=text)
+
+        if language is None:
+            language = self.language
+
+        if gender is None:
+            gender = self.gender
+        else:
+            gender = getattr(texttospeech.enums.SsmlVoiceGender, gender.upper())
+
+        if voice is None:
+            voice = self.voice
+
+        voice = texttospeech.types.VoiceSelectionParams(
+            language_code=language, ssml_gender=gender,
+            name=voice)
+
+        audio_config = texttospeech.types.AudioConfig(
+            audio_encoding=texttospeech.enums.AudioEncoding.MP3)
+
+        response = client.synthesize_speech(synthesis_input, voice, audio_config)
+
+        with tempfile.NamedTemporaryFile() as f:
+            f.write(response.audio_content)
+
+            output = None
+            errors = []
+            cmd = ['mplayer -ao alsa -really-quiet -noconsolecontrols {}'
+                   .format(f.name)]
+
+            try:
+                return subprocess.check_output(
+                    cmd, stderr=subprocess.STDOUT, shell=True).decode('utf-8')
+            except subprocess.CalledProcessError as e:
+                raise RuntimeError(e.output.decode('utf-8'))
+
+
+# vim:sw=4:ts=4:et:
+