VoiceStudio/backend/core/personalities.py

"""Built-in voice personality presets.

Each personality is a named bundle of TTS-instruct taxonomy tokens (gender,
age, pitch, accent, dialect, style — see ``omnivoice.utils.voice_design``)
that users can pick from a strip in the Voice Design tab.

Why taxonomy tokens and not prose
=================================
OmniVoice's ``model.generate(instruct=...)`` runs every instruct string
through ``_resolve_instruct``, which splits on commas and validates each
item against a fixed vocabulary (e.g. ``male``, ``middle-aged``,
``moderate pitch``, ``british accent``). Anything outside that vocabulary
raises ``ValueError`` and surfaces to the user as a generation failure.

Earlier versions of this file shipped prose like
``"Speak clearly and professionally like a television news presenter"``
which always failed the validator — clicking *any* personality button in
the Design tab made the next Synthesize call crash (issue #89). Each
personality below maps to a comma-separated list of valid taxonomy
tokens so the picked instruct string is accepted by the model.

The ``description`` field is the human-readable explanation kept for
parity with the old field and for any future UI tooltips; the frontend
today only renders ``name`` and ``icon``. ``instruct`` is what flows into
``setInstruct`` on click.
"""

PERSONALITIES = [
    {
        "id": "narrator",
        "name": "Narrator",
        # Calm documentary-narrator vibe: settled adult, mid-low pitch.
        "instruct": "middle-aged, low pitch",
        "description": "Calm, authoritative documentary narrator with measured pacing",
        "icon": "📖",
    },
    {
        "id": "casual",
        "name": "Casual",
        # Relaxed, conversational — younger speaker, neutral pitch.
        "instruct": "young adult, moderate pitch",
        "description": "Relaxed, conversational tone like talking to a friend",
        "icon": "😊",
    },
    {
        "id": "news_anchor",
        "name": "News Anchor",
        # Clear, professional broadcaster — adult voice with US accent.
        "instruct": "middle-aged, moderate pitch, american accent",
        "description": "Clear, professional television news presenter",
        "icon": "📺",
    },
    {
        "id": "storyteller",
        "name": "Storyteller",
        # Dramatic bedtime-story flair — British accent reads well here.
        "instruct": "middle-aged, moderate pitch, british accent",
        "description": "Dramatic flair and engaging pacing like reading a bedtime story",
        "icon": "🧙",
    },
    {
        "id": "corporate",
        "name": "Corporate",
        # Polished business-presentation register.
        "instruct": "middle-aged, moderate pitch",
        "description": "Polished, professional tone suitable for business presentations",
        "icon": "💼",
    },
    {
        "id": "energetic",
        "name": "Energetic",
        # High-energy podcast host — younger speaker, higher pitch.
        "instruct": "young adult, high pitch",
        "description": "High energy and enthusiasm like a podcast host",
        "icon": "⚡",
    },
    # ─────────────────────────────────────────────────────────────────────
    # Demo presets — render as a 7-card grid in the empty Design tab.
    # Each preset bundles taxonomy `attrs` (drives the CATEGORIES sliders),
    # a sample `script` (pre-fills the textarea), and a `preview_url`
    # pointing at a pre-rendered WAV under /demo_audio.
    #
    # `is_demo: True` is the marker the frontend filters on; the legacy 6
    # entries above stay as chips, the entries below render as full cards.
    # WAVs are generated by scripts/build_demos.sh — keep slugs in sync.
    # ─────────────────────────────────────────────────────────────────────
    {
        "id": "audiobook_uk_narrator",
        "name": "The Librarian",
        "icon": "📚",
        "description": "Warm UK audiobook narrator — measured, atmospheric.",
        "instruct": "female, middle-aged, low pitch, british accent",
        "attrs": {
            "Gender": "female", "Age": "middle-aged", "Pitch": "low pitch",
            "Style": "Auto", "EnglishAccent": "british accent",
            "ChineseDialect": "Auto",
        },
        "script": (
            "The clock tower struck thirteen, and for the first time in her "
            "life, Eleanor wondered if she had been counting wrong all along."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_audiobook_uk_narrator.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "us_news_anchor",
        "name": "The Anchor",
        "icon": "📺",
        "description": "Clear American broadcaster — primetime evening news.",
        "instruct": "male, middle-aged, moderate pitch, american accent",
        "attrs": {
            "Gender": "male", "Age": "middle-aged", "Pitch": "moderate pitch",
            "Style": "Auto", "EnglishAccent": "american accent",
            "ChineseDialect": "Auto",
        },
        "script": (
            "Good evening. Topping our broadcast tonight: scientists at the "
            "coastal observatory have confirmed the signal is, in fact, repeating."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_us_news_anchor.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "indian_support_agent",
        "name": "The Helpdesk",
        "icon": "🎧",
        "description": "Patient Indian-English customer-service voice.",
        "instruct": "female, young adult, moderate pitch, indian accent",
        "attrs": {
            "Gender": "female", "Age": "young adult", "Pitch": "moderate pitch",
            "Style": "Auto", "EnglishAccent": "indian accent",
            "ChineseDialect": "Auto",
        },
        "script": (
            "Thank you for calling OmniVoice support. I can see your account "
            "here. Let's get this sorted out together."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_indian_support_agent.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "gravelly_villain",
        "name": "Captain Crusty",
        "icon": "☠️",
        "description": "Gravelly old sailor — cartoon villain energy, original character.",
        "instruct": "male, elderly, very low pitch",
        "attrs": {
            "Gender": "male", "Age": "elderly", "Pitch": "very low pitch",
            "Style": "Auto", "EnglishAccent": "Auto",
            "ChineseDialect": "Auto",
        },
        "script": (
            "You came a long way for an answer you already had. Sit. The "
            "fire is warm, and the truth is not."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_gravelly_villain.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "aussie_podcaster",
        "name": "The Podcaster",
        "icon": "🎙️",
        "description": "Aussie explainer-show host — quick, punchy, friendly.",
        "instruct": "female, young adult, high pitch, australian accent",
        "attrs": {
            "Gender": "female", "Age": "young adult", "Pitch": "high pitch",
            "Style": "Auto", "EnglishAccent": "australian accent",
            "ChineseDialect": "Auto",
        },
        "script": (
            "Right, so here's the wild bit. Nobody told the engineers the "
            "satellite was supposed to be in orbit by Tuesday. Tuesday came and went."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_aussie_podcaster.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "bedtime_storyteller",
        "name": "Junior Quacks",
        "icon": "🦆",
        "description": "Anxious squawky sidekick — cartoon nephew energy, original character.",
        "instruct": "young adult, high pitch",
        "attrs": {
            "Gender": "Auto", "Age": "young adult", "Pitch": "high pitch",
            "Style": "Auto", "EnglishAccent": "Auto",
            "ChineseDialect": "Auto",
        },
        "script": (
            "Once, in a town where every street was named after a kind of "
            "bread, a small fox decided she was going to learn to play the cello."
        ),
        "preview_url": "/demo_audio/voice_design/demo_voice_design_bedtime_storyteller.wav",
        "language": "English",
        "is_demo": True,
    },
    {
        "id": "mandarin_sichuan",
        "name": "The Sichuan Friend",
        "icon": "🌶️",
        "description": "四川话 — non-English showcase, dialect-aware design.",
        "instruct": "female, young adult, moderate pitch, 四川话",
        "attrs": {
            "Gender": "female", "Age": "young adult", "Pitch": "moderate pitch",
            "Style": "Auto", "EnglishAccent": "Auto",
            "ChineseDialect": "四川话",
        },
        "script": "今天天气巴适得很，我们去吃火锅嘛！记得多加点豆芽。",
        "preview_url": "/demo_audio/voice_design/demo_voice_design_mandarin_sichuan.wav",
        "language": "Chinese",
        "is_demo": True,
    },
]


def get_personalities():
    """Return the full list of built-in personality presets."""
    return PERSONALITIES


def get_personality(personality_id: str):
    """Look up a single personality by ID, or None."""
    for p in PERSONALITIES:
        if p["id"] == personality_id:
            return p
    return None