app.py

import warnings
import spaces
warnings.filterwarnings("ignore")
import logging
from argparse import ArgumentParser
from pathlib import Path
import torch
import torchaudio
import gradio as gr
from transformers import AutoModel
import laion_clap
from meanaudio.eval_utils import (
    ModelConfig,
    all_model_cfg,
    generate_mf,
    generate_fm,
    setup_eval_logging,
)
from meanaudio.model.flow_matching import FlowMatching
from meanaudio.model.mean_flow import MeanFlow
from meanaudio.model.networks import MeanAudio, get_mean_audio
from meanaudio.model.utils.features_utils import FeaturesUtils
torch.backends.cuda.matmul.allow_tf32 = True
torch.backends.cudnn.allow_tf32 = True
import gc
from datetime import datetime
from huggingface_hub import snapshot_download
import numpy as np

log = logging.getLogger()
device = "cpu"

if torch.cuda.is_available():
    device = "cuda"
setup_eval_logging()

OUTPUT_DIR = Path("./output/gradio")
OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
NUM_SAMPLE = 1

# Global model cache to avoid reloading
MODEL_CACHE = {}
FEATURE_UTILS_CACHE = {}

def ensure_models_downloaded():
    for variant, model_cfg in all_model_cfg.items():
        if not model_cfg.model_path.exists():
            log.info(f'Model {variant} not found, downloading...')
            snapshot_download(repo_id="AndreasXi/MeanAudio", local_dir="./weights")
            break

def load_model_if_needed(variant: str):
    if variant in MODEL_CACHE:
        return MODEL_CACHE[variant], FEATURE_UTILS_CACHE[variant]
    
    log.info(f"Loading model {variant} for the first time...")
    model_cfg = all_model_cfg[variant]
    
    net = get_mean_audio(model_cfg.model_name, use_rope=True, text_c_dim=512)
    net = net.to(device, torch.bfloat16).eval()
    net.load_weights(torch.load(model_cfg.model_path, map_location=device, weights_only=True))
    
    feature_utils = FeaturesUtils(
        tod_vae_ckpt=model_cfg.vae_path,
        enable_conditions=True,
        encoder_name="t5_clap", 
        mode=model_cfg.mode,
        bigvgan_vocoder_ckpt=model_cfg.bigvgan_16k_path,
        need_vae_encoder=False
    )
    feature_utils = feature_utils.to(device, torch.bfloat16).eval()
    
    MODEL_CACHE[variant] = net
    FEATURE_UTILS_CACHE[variant] = feature_utils
    
    log.info(f"Model {variant} loaded and cached successfully")
    return net, feature_utils

ensure_models_downloaded()


@spaces.GPU(duration=60)
@torch.inference_mode()
def generate_audio_gradio(
    prompt,
    negative_prompt,
    duration,
    cfg_strength,
    num_steps,
    seed,
    variant,
):
    dtype = torch.bfloat16
    if duration <= 0 or num_steps <= 0:
        raise ValueError("Duration and number of steps must be positive.")
    if variant not in all_model_cfg:
        raise ValueError(f"Unknown model variant: {variant}. Available: {list(all_model_cfg.keys())}")

    net, feature_utils = load_model_if_needed(variant)
    
    model = all_model_cfg[variant]
    seq_cfg = model.seq_cfg
    seq_cfg.duration = duration
    
    net.update_seq_lengths(seq_cfg.latent_seq_len)


    if variant == 'meanaudio_s_ac' or variant == 'meanaudio_s_full':
        use_meanflow=True
    elif variant == 'fluxaudio_s_full':
        use_meanflow=False

    if use_meanflow:
        sampler = MeanFlow(steps=num_steps)
        log.info("Using MeanFlow for generation.")
        generation_func = generate_mf
        sampler_arg_name = "mf"
        cfg_strength = 0
    else:
        sampler = FlowMatching(
            min_sigma=0, inference_mode="euler", num_steps=num_steps
        )
        log.info("Using FlowMatching for generation.")
        generation_func = generate_fm
        sampler_arg_name = "fm"

    rng = torch.Generator(device=device)
    rng.manual_seed(seed)

    audios = generation_func(
        [prompt]*NUM_SAMPLE,
        negative_text=None,
        feature_utils=feature_utils,
        net=net,
        rng=rng,
        cfg_strength=cfg_strength,
        **{sampler_arg_name: sampler},
    )
    audio = audios[0].float().cpu()
    
    def fade_out(x, sr, fade_ms=30):
        n = len(x)
        k = int(sr * fade_ms / 1000)
        if k <= 0 or k >= n: 
            return x
        w = np.linspace(1.0, 0.0, k)
        x[-k:] = x[-k:] * w
        return x
    audio = fade_out(audio, seq_cfg.sampling_rate)

    # text_embed = laion_clap_model.get_text_embedding(prompt, use_tensor=True).squeeze()
    # audio_embed = laion_clap_model.get_audio_embedding_from_data(audios[:,0,:].float().cpu(), use_tensor=True).squeeze()
    # scores = torch.cosine_similarity(text_embed.expand(audio_embed.shape[0], -1),
    #                                  audio_embed,
    #                                  dim=-1)
    # log.info(scores)
    # log.info(torch.argmax(scores).item())
    # audio = audios[torch.argmax(scores).item()].float().cpu()
    safe_prompt = (
        "".join(c for c in prompt if c.isalnum() or c in (" ", "_"))
        .rstrip()
        .replace(" ", "_")[:50]
    )
    current_time_string = datetime.now().strftime("%Y%m%d_%H%M%S_%f")
    filename = f"{safe_prompt}_{current_time_string}.flac"
    save_path = OUTPUT_DIR / filename
    torchaudio.save(str(save_path), audio, seq_cfg.sampling_rate)
    log.info(f"Audio saved to {save_path}")

    if device == "cuda":
        torch.cuda.empty_cache()

    return (
        f"Generated audio for prompt: '{prompt}' using {'MeanFlow' if use_meanflow else 'FlowMatching'}",
        str(save_path),
    )

theme = gr.themes.Soft(
    primary_hue="blue",
    secondary_hue="slate",
    neutral_hue="slate",
    text_size="sm",
    spacing_size="sm",
).set(
    background_fill_primary="*neutral_50",
    background_fill_secondary="*background_fill_primary",
    block_background_fill="*background_fill_primary",
    block_border_width="0px",
    panel_background_fill="*neutral_50",
    panel_border_width="0px",
    input_background_fill="*neutral_100",
    input_border_color="*neutral_200",
    button_primary_background_fill="*primary_300",
    button_primary_background_fill_hover="*primary_400",
    button_secondary_background_fill="*neutral_200",
    button_secondary_background_fill_hover="*neutral_300",
)
custom_css = """
#main-headertitle {
    text-align: center;
    margin-top: 15px;
    margin-bottom: 10px;
    color: var(--neutral-600);
    font-weight: 600;
}
#main-header {
    text-align: center;
    margin-top: 5px;
    margin-bottom: 10px;
    color: var(--neutral-600);
    font-weight: 600;
}
#model-settings-header, #generation-settings-header {
    color: var(--neutral-600);
    margin-top: 8px;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 1.1em;
}
.setting-section {
    padding: 10px 12px;
    border-radius: 6px;
    background-color: var(--neutral-50);
    margin-bottom: 10px;
    border: 1px solid var(--neutral-100);
}
hr {
    border: none;
    height: 1px;
    background-color: var(--neutral-200);
    margin: 8px 0;
}
#generate-btn {
    width: 100%;
    max-width: 250px;
    margin: 10px auto;
    display: block;
    padding: 10px 15px;
    font-size: 16px;
    border-radius: 5px;
}
#status-box {
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border-radius: 5px;
    border: 1px solid var(--neutral-200);
    color: var(--neutral-700);
}
#project-badges {
    text-align: center;
    margin-top: 30px;
    margin-bottom: 20px;
}
#project-badges #badge-container {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}
#project-badges img {
    border-radius: 5px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    height: 20px;
    transition: transform 0.1s ease, box-shadow 0.1s ease;
}
#project-badges a:hover img {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}
#audio-output {
    height: 200px;
    border-radius: 5px;
    border: 1px solid var(--neutral-200);
}
.gradio-dropdown label, .gradio-checkbox label, .gradio-number label, .gradio-textbox label {
    font-weight: 500;
    color: var(--neutral-700);
    font-size: 0.9em;
}
.gradio-row {
   gap: 8px;
}
.gradio-block {
   margin-bottom: 8px;
}
.setting-section .gradio-block {
    margin-bottom: 6px;
}
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--neutral-100);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb {
  background: var(--neutral-300);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--neutral-400);
}
* {
  scrollbar-width: thin;
  scrollbar-color: var(--neutral-300) var(--neutral-100);
}
"""
with gr.Blocks(title="MeanAudio Generator", theme=theme, css=custom_css) as demo:
    gr.Markdown("# MeanAudio: Fast and Faithful Text-to-Audio Generation with Mean Flows", elem_id="main-header")
    badge_html = '''
    <div id="project-badges"> <!-- 使用 ID
    以便应用 CSS -->
    <div id="badge-container"> <!-- 添加这个容器 div 并使用 ID -->
        <a href="https://huggingface.co/junxiliu/MeanAudio">
        <img src="https://img.shields.io/badge/Model-HuggingFace-violet?logo=huggingface" alt="Hugging Face Model">
        </a>
        <a href="https://huggingface.co/spaces/chenxie95/MeanAudio">
        <img src="https://img.shields.io/badge/Space-HuggingFace-8A2BE2?logo=huggingface" alt="Hugging Face Space">
        </a>
        <a href="https://meanaudio.github.io/">
        <img src="https://img.shields.io/badge/Project-Page-brightred?style=flat" alt="Project Page">
        </a>
        <a href="https://github.com/xiquan-li/MeanAudio">
        <img src="https://img.shields.io/badge/Code-GitHub-black?logo=github" alt="GitHub">
        </a>
    </div>
    </div>
    '''
    gr.HTML(badge_html)
    with gr.Column(elem_classes="setting-section"):
        with gr.Row():
            available_variants = (
                list(all_model_cfg.keys()) if all_model_cfg else []
            )
            default_variant = (
                'meanaudio_mf'
            )
            variant = gr.Dropdown(
                label="Model Variant",
                choices=available_variants,
                value=default_variant,
                interactive=True,
                scale=3,
            )
    with gr.Column(elem_classes="setting-section"):
        with gr.Row():
            prompt = gr.Textbox(
                label="Prompt",
                placeholder="Describe the sound you want to generate...",
                scale=1,
            )
            negative_prompt = gr.Textbox(
                label="Negative Prompt",
                placeholder="Describe sounds you want to avoid...",
                value="",
                scale=1,
            )
        with gr.Row():
            duration = gr.Number(
                label="Duration (sec)", value=10.0, minimum=0.1, scale=1
            )
            cfg_strength = gr.Number(
                label="CFG (Meanflow forced to 3)", value=3, minimum=0.0, scale=1
            )
        with gr.Row():
            seed = gr.Number(
                label="Seed (-1 for random)", value=42, precision=0, scale=1
            )
            num_steps = gr.Number(
                label="Number of Steps",
                value=1,
                precision=0,
                minimum=1,
                scale=1,
            )
    generate_button = gr.Button("Generate", variant="primary", elem_id="generate-btn")
    generate_output_text = gr.Textbox(
        label="Result Status", interactive=False, elem_id="status-box"
    )
    audio_output = gr.Audio(
        label="Generated Audio", type="filepath", elem_id="audio-output"
    )
    generate_button.click(
        fn=generate_audio_gradio,
        inputs=[
            prompt,
            negative_prompt,
            duration,
            cfg_strength,
            num_steps,
            seed,
            variant,
        ],
        outputs=[generate_output_text, audio_output],
    )
    audio_examples = [
        ["Typing on a keyboard", "", 10.0, 3, 1, 42, "meanaudio_mf"],
        ["A man speaks followed by a popping noise and laughter", "", 10.0, 3, 1, 42, "meanaudio_mf"],
        ["Some humming followed by a toilet flushing", "", 10.0, 3, 2, 42, "meanaudio_mf"],
        ["Rain falling on a hard surface as thunder roars in the distance", "", 10.0, 3, 5, 42, "meanaudio_mf"],
        ["Food sizzling and oil popping", "", 10.0, 3, 25, 42, "meanaudio_mf"],
        ["Pots and dishes clanking as a man talks followed by liquid pouring into a container", "", 8.0, 3, 2, 42, "meanaudio_mf"],
        ["A few seconds of silence then a rasping sound against wood", "", 12.0, 3, 2, 42, "meanaudio_mf"],
        ["A man speaks as he gives a speech and then the crowd cheers", "", 10.0, 3, 25, 42, "fluxaudio_fm"],
        ["A goat bleating repeatedly", "", 10.0, 3, 50, 123, "fluxaudio_fm"],
        ["A speech and gunfire followed by a gun being loaded", "", 10.0, 3, 1, 42, "meanaudio_mf"],
        ["Tires squealing followed by an engine revving", "", 12.0, 4, 25, 456, "fluxaudio_fm"],
        ["Hammer slowly hitting the wooden table", "", 10.0, 3.5, 25, 42, "fluxaudio_fm"],
        ["Dog barking excitedly and man shouting as race car engine roars past", "", 10.0, 3, 1, 42, "meanaudio_mf"],
        ["A dog barking and a cat mewing and a racing car passes by", "", 12.0, 3, 5, -1, "meanaudio_mf"],
        ["Whistling with birds chirping", "", 10.0, 4, 50, 42, "fluxaudio_fm"],
    ]
    gr.Examples(
        examples=audio_examples,
        inputs=[prompt, negative_prompt, duration, cfg_strength, num_steps, seed, variant],
        #outputs=[generate_output_text, audio_output],
        #fn=generate_audio_gradio,
        examples_per_page=5,
        label="Example Prompts",
    )

if __name__ == "__main__":
    demo.launch()