interface.py

import time
import uuid

import gradio as gr
import spaces
import yaml

from characters import CHARACTERS
from pipeline import SingingDialoguePipeline

pipe = None


def _ensure_pipeline(config):
    """Ensure pipeline is initialized in GPU worker context."""
    global pipe
    if pipe is None:
        pipe = SingingDialoguePipeline(config)


@spaces.GPU(duration=120)
def run_pipeline(audio_path, config, svs_model_info, character_prompt, current_voice):
    global pipe

    if not audio_path:
        return gr.update(value=None), gr.update(value=None), None

    _ensure_pipeline(config)

    tmp_file = f"audio_{int(time.time())}_{uuid.uuid4().hex[:8]}.wav"
    results = pipe.run(
        audio_path,
        svs_model_info["lang"],
        character_prompt,
        current_voice,
        output_audio_path=tmp_file,
    )

    formatted_logs = f"ASR: {results['asr_text']}\nLLM: {results['llm_text']}"
    return (
        gr.update(value=formatted_logs),
        gr.update(value=results["output_audio_path"]),
        results,
    )


@spaces.GPU(duration=120)
def update_metrics(audio_path, config, results_data):
    global pipe

    if not audio_path or not results_data:
        return gr.update(value="")

    _ensure_pipeline(config)

    results = pipe.evaluate(audio_path, **results_data)
    results.update(results_data.get("metrics", {}))
    formatted_metrics = "\n".join([f"{k}: {v}" for k, v in results.items()])
    return gr.update(value=formatted_metrics)


@spaces.GPU(duration=120)
def update_asr_model_in_pipeline(config, asr_model):
    _ensure_pipeline(config)
    pipe.set_asr_model(asr_model)
    return gr.update(value=asr_model)


@spaces.GPU(duration=120)
def update_llm_model_in_pipeline(config, llm_model):
    _ensure_pipeline(config)
    pipe.set_llm_model(llm_model)
    return gr.update(value=llm_model)


@spaces.GPU(duration=120)
def update_svs_model_in_pipeline(config, svs_model_path):
    _ensure_pipeline(config)
    pipe.set_svs_model(svs_model_path)
    return gr.update()


@spaces.GPU(duration=120)
def update_melody_source_in_pipeline(config, melody_source):
    _ensure_pipeline(config)
    pipe.set_melody_controller(melody_source)
    return gr.update(value=melody_source)


class GradioInterface:
    def __init__(self, options_config: str, default_config: str):
        self.options = self.load_config(options_config)
        self.svs_model_map = {
            model["id"]: model for model in self.options["svs_models"]
        }
        self.default_config = self.load_config(default_config)
        self.character_info = CHARACTERS
        self.current_character = self.default_config["character"]
        self.current_svs_model = (
            f"{self.default_config['language']}-{self.default_config['svs_model']}"
        )
        self.current_voice = self.svs_model_map[self.current_svs_model]["voices"][
            self.character_info[self.current_character].default_voice
        ]
        self.results = None

    def load_config(self, path: str):
        with open(path, "r") as f:
            return yaml.safe_load(f)

    def create_interface(self) -> gr.Blocks:
        try:
            with gr.Blocks(title="SingingSDS") as demo:
                gr.Markdown("# SingingSDS: Role-Playing Singing Spoken Dialogue System")
                with gr.Row():
                    with gr.Column(scale=1):
                        character_image = gr.Image(
                            self.character_info[self.current_character].image_path,
                            label="Character",
                            show_label=False,
                        )
                    with gr.Column(scale=2):
                        mic_input = gr.Audio(
                            sources=["microphone", "upload"],
                            type="filepath",
                            label="Speak to the character",
                        )
                        interaction_log = gr.Textbox(
                            label="Interaction Log", lines=3, interactive=False
                        )
                        audio_output = gr.Audio(
                            label="Character's Response",
                            type="filepath",
                            autoplay=True,
                            interactive=False,
                        )

                        with gr.Row():
                            metrics_button = gr.Button(
                                "Evaluate Metrics", variant="secondary"
                            )
                            metrics_output = gr.Textbox(
                                label="Evaluation Results", lines=3, interactive=False
                            )

                gr.Markdown("## Configuration")
                with gr.Row():
                    with gr.Column():
                        character_radio = gr.Radio(
                            label="Character Role",
                            choices=list(self.character_info.keys()),
                            value=self.default_config["character"],
                        )
                        with gr.Row():
                            asr_radio = gr.Radio(
                                label="ASR Model",
                                choices=[
                                    (model["name"], model["id"])
                                    for model in self.options["asr_models"]
                                ],
                                value=self.default_config["asr_model"],
                            )
                        with gr.Row():
                            llm_radio = gr.Radio(
                                label="LLM Model",
                                choices=[
                                    (model["name"], model["id"])
                                    for model in self.options["llm_models"]
                                ],
                                value=self.default_config["llm_model"],
                            )
                    with gr.Column():
                        with gr.Row():
                            melody_radio = gr.Radio(
                                label="Melody Source",
                                choices=[
                                    (source["name"], source["id"])
                                    for source in self.options["melody_sources"]
                                ],
                                value=self.default_config["melody_source"],
                            )
                        with gr.Row():
                            svs_radio = gr.Radio(
                                label="SVS Model",
                                choices=[
                                    (model["name"], model["id"])
                                    for model in self.options["svs_models"]
                                ],
                                value=self.current_svs_model,
                            )
                        with gr.Row():
                            voice_radio = gr.Radio(
                                label="Singing voice",
                                choices=list(
                                    self.svs_model_map[self.current_svs_model][
                                        "voices"
                                    ].keys()
                                ),
                                value=self.character_info[
                                    self.current_character
                                ].default_voice,
                            )
                character_radio.change(
                    fn=self.update_character,
                    inputs=character_radio,
                    outputs=[character_image, voice_radio],
                )
                asr_radio.change(
                    fn=self.update_asr_model, inputs=asr_radio, outputs=asr_radio
                )
                llm_radio.change(
                    fn=self.update_llm_model, inputs=llm_radio, outputs=llm_radio
                )
                svs_radio.change(
                    fn=self.update_svs_model,
                    inputs=svs_radio,
                    outputs=[svs_radio, voice_radio],
                )
                melody_radio.change(
                    fn=self.update_melody_source,
                    inputs=melody_radio,
                    outputs=melody_radio,
                )
                voice_radio.change(
                    fn=self.update_voice, inputs=voice_radio, outputs=voice_radio
                )
                mic_input.change(
                    fn=self._run_pipeline_wrapper,
                    inputs=mic_input,
                    outputs=[interaction_log, audio_output],
                )
                metrics_button.click(
                    fn=self._update_metrics_wrapper,
                    inputs=audio_output,
                    outputs=[metrics_output],
                )
                
                gr.Markdown(
                    "<div style='text-align: right; font-size: 12px; color: #666; margin-top: 20px;'>Yaoyin character illustration by Zihe Zhou</div>",
                    elem_classes="footer"
                )


            return demo
        except Exception:
            import traceback

            print(traceback.format_exc())
            return gr.Blocks()

    def update_character(self, character):
        self.current_character = character
        character_voice = self.character_info[self.current_character].default_voice
        self.current_voice = self.svs_model_map[self.current_svs_model]["voices"][
            character_voice
        ]
        return gr.update(value=self.character_info[character].image_path), gr.update(
            value=character_voice
        )

    def update_asr_model(self, asr_model):
        self.default_config["asr_model"] = asr_model
        return update_asr_model_in_pipeline(self.default_config, asr_model)

    def update_llm_model(self, llm_model):
        self.default_config["llm_model"] = llm_model
        return update_llm_model_in_pipeline(self.default_config, llm_model)

    def update_svs_model(self, svs_model):
        self.current_svs_model = svs_model
        character_voice = self.character_info[self.current_character].default_voice
        self.current_voice = self.svs_model_map[self.current_svs_model]["voices"][
            character_voice
        ]
        svs_model_path = self.svs_model_map[self.current_svs_model]["model_path"]
        self.default_config["svs_model"] = svs_model_path
        update_svs_model_in_pipeline(self.default_config, svs_model_path)
        return (
            gr.update(value=svs_model),
            gr.update(
                choices=list(
                    self.svs_model_map[self.current_svs_model]["voices"].keys()
                ),
                value=character_voice,
            ),
        )

    def update_melody_source(self, melody_source):
        self.current_melody_source = melody_source
        self.default_config["melody_source"] = melody_source
        return update_melody_source_in_pipeline(self.default_config, melody_source)

    def update_voice(self, voice):
        self.current_voice = self.svs_model_map[self.current_svs_model]["voices"][voice]
        return gr.update(value=voice)

    def _run_pipeline_wrapper(self, audio_path):
        log_update, audio_update, pipeline_results = run_pipeline(
            audio_path,
            self.default_config,
            self.svs_model_map[self.current_svs_model],
            self.character_info[self.current_character].prompt,
            self.current_voice,
        )
        if pipeline_results:
            self.results = pipeline_results
        return log_update, audio_update

    def _update_metrics_wrapper(self, audio_path):
        return update_metrics(audio_path, self.default_config, self.results or {})