106 lines
4.1 KiB
Python
106 lines
4.1 KiB
Python
import os
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import struct
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import io
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import torchaudio
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from google.genai import Client, types
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class GeminiTTSNode:
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"text": ("STRING", {"multiline": True, "default": ""}),
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"api_key": ("STRING", {"multiline": False, "default": ""}),
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"model": (["gemini-2.5-flash-preview-tts", "gemini-2.5-pro-preview-tts"],),
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"voice_id": (["Zephyr", "Puck", "Charon", "Kore", "Fenrir", "Leda", "Orus", "Aoede", "Callirrhoe", "Autonoe", "Enceladus", "Iapetus", "Umbriel", "Algieba", "Despina", "Erinome", "Achernar", "Laomedeia", "Rasalgethi", "Algenib", "Achird", "Pulcherrima", "Gacrux", "Schedar", "Alnilam", "Sulafat", "Sadaltager", "Sadachbia", "Vindemiatrix", "Zubenelgenubi"],),
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"seed": ("INT", {"default": 69, "min": -1, "max": 2147483646, "step": 1}),
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"temperature": ("FLOAT", {"default": 1.0, "min": 0.0, "max": 1.0, "step": 0.01}),
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},
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"optional": {
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"system_prompt": ("STRING", {"multiline": True, "default": ""}),
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}
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}
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RETURN_TYPES = ("AUDIO",)
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RETURN_NAMES = ("audio",)
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FUNCTION = "generate_speech"
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CATEGORY = "audio/generation"
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def generate_speech(self, text, api_key, voice_id, temperature, model, seed, system_prompt=""):
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if not text.strip():
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raise ValueError("Text input cannot be empty.")
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key = api_key.strip() or os.environ.get("GEMINI_TTS_API_KEY")
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if not key:
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raise ValueError("No API key provided.")
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client = Client(
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api_key=key,
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http_options=types.HttpOptions(
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retry_options=types.HttpRetryOptions(attempts=10, jitter=10)
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)
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)
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# Build prompt
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prompt_text = text
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if system_prompt.strip():
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prompt_text = system_prompt.strip() + ":\n\n\"" + text + "\""
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contents = [types.Content(role="user", parts=[types.Part.from_text(text=prompt_text)])]
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config = types.GenerateContentConfig(
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temperature=temperature,
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seed=seed,
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response_modalities=["audio"],
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speech_config=types.SpeechConfig(
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voice_config=types.VoiceConfig(
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prebuilt_voice_config=types.PrebuiltVoiceConfig(voice_name=voice_id)
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)
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),
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)
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# Generate audio
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audio_data = b""
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mime_type = None
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for chunk in client.models.generate_content_stream(
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model=model,
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contents=contents,
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config=config
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):
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if (chunk.candidates and chunk.candidates[0].content and
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chunk.candidates[0].content.parts and
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chunk.candidates[0].content.parts[0].inline_data):
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inline_data = chunk.candidates[0].content.parts[0].inline_data
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audio_data += inline_data.data
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if mime_type is None:
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mime_type = inline_data.mime_type
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if not audio_data:
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raise ValueError("No audio data received from API.")
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if mime_type and "L16" in mime_type:
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header = struct.pack(
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"<4sI4s4sIHHIIHH4sI",
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b"RIFF", 36 + len(audio_data),
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b"WAVE", b"fmt ", 16, 1, 1, 24000, 48000, 2, 16,
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b"data", len(audio_data)
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)
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audio_data = header + audio_data
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# Decode audio from memory
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audio_buffer = io.BytesIO(audio_data)
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waveform, sample_rate = torchaudio.load(audio_buffer)
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# Return in ComfyUI audio format
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return ({"waveform": waveform.unsqueeze(0), "sample_rate": sample_rate},)
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@classmethod
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def IS_CHANGED(cls, **kwargs):
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return f"{kwargs.get('text', '')}-{kwargs.get('voice_id', '')}-{kwargs.get('temperature', 1.0)}-{kwargs.get('model', '')}-{kwargs.get('seed', 69)}-{kwargs.get('system_prompt', '')}"
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NODE_CLASS_MAPPINGS = {"GeminiTTSNode": GeminiTTSNode}
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NODE_DISPLAY_NAME_MAPPINGS = {"GeminiTTSNode": "Gemini TTS"} |