tts.py

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"""Support for the Pico TTS speech service."""
 
import logging
import os
import shutil
import subprocess
import tempfile
 
import voluptuous as vol
 
from homeassistant.components.tts import (
    CONF_LANG,
    PLATFORM_SCHEMA as TTS_PLATFORM_SCHEMA,
    Provider,
)
 
_LOGGER = logging.getLogger(__name__)
 
SUPPORT_LANGUAGES = ["en-US", "en-GB", "de-DE", "es-ES", "fr-FR", "it-IT"]
 
DEFAULT_LANG = "en-US"
 
PLATFORM_SCHEMA = TTS_PLATFORM_SCHEMA.extend(
    {vol.Optional(CONF_LANG, default=DEFAULT_LANG): vol.In(SUPPORT_LANGUAGES)}
)
 
 
def get_engine(hass, config, discovery_info=None):
    """Set up Pico speech component."""
    if shutil.which("pico2wave") is None:
        _LOGGER.error("'pico2wave' was not found")
        return False
    return PicoProvider(config[CONF_LANG])
 
 
class PicoProvider(Provider):
    """The Pico TTS API provider."""
 
    def __init__(self, lang):
        """Initialize Pico TTS provider."""
        self._lang_lang = lang
        self.namename = "PicoTTS"
 
    @property
    def default_language(self):
        """Return the default language."""
        return self._lang_lang
 
    @property
    def supported_languages(self):
        """Return list of supported languages."""
        return SUPPORT_LANGUAGES
 
    def get_tts_audio(self, message, language, options):
        """Load TTS using pico2wave."""
        with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as tmpf:
            fname = tmpf.name
 
        cmd = ["pico2wave", "--wave", fname, "-l", language, "--", message]
        subprocess.call(cmd)
        data = None
        try:
            with open(fname, "rb") as voice:
                data = voice.read()
        except OSError:
            _LOGGER.error("Error trying to read %s", fname)
            return (None, None)
        finally:
            os.remove(fname)
 
        if data:
            return ("wav", data)
        return (None, None)