app.py

import gradio as gr
import torch
from diffusers import AudioLDMPipeline
from share_btn import community_icon_html, loading_icon_html, share_js

from transformers import AutoProcessor, ClapModel


# make Space compatible with CPU duplicates
if torch.cuda.is_available():
    device = "cuda"
    torch_dtype = torch.float16
else:
    device = "cpu"
    torch_dtype = torch.float32

# load the diffusers pipeline
repo_id = "cvssp/audioldm-m-full"
pipe = AudioLDMPipeline.from_pretrained(repo_id, torch_dtype=torch_dtype).to(device)
pipe.unet = torch.compile(pipe.unet)

# CLAP model (only required for automatic scoring)
clap_model = ClapModel.from_pretrained("sanchit-gandhi/clap-htsat-unfused-m-full").to(device)
processor = AutoProcessor.from_pretrained("sanchit-gandhi/clap-htsat-unfused-m-full")

generator = torch.Generator(device)


def text2audio(text, negative_prompt, duration, guidance_scale, random_seed, n_candidates):
    if text is None:
        raise gr.Error("Please provide a text input.")

    waveforms = pipe(
        text,
        audio_length_in_s=duration,
        guidance_scale=guidance_scale,
        negative_prompt=negative_prompt,
        num_waveforms_per_prompt=n_candidates if n_candidates else 1,
        generator=generator.manual_seed(int(random_seed)),
    )["audios"]

    if waveforms.shape[0] > 1:
        waveform = score_waveforms(text, waveforms)
    else:
        waveform = waveforms[0]

    return gr.make_waveform((16000, waveform), bg_image="bg.png")


def score_waveforms(text, waveforms):
    inputs = processor(text=text, audios=list(waveforms), return_tensors="pt", padding=True)
    inputs = {key: inputs[key].to(device) for key in inputs}
    with torch.no_grad():
        logits_per_text = clap_model(**inputs).logits_per_text  # this is the audio-text similarity score
        probs = logits_per_text.softmax(dim=-1)  # we can take the softmax to get the label probabilities
        most_probable = torch.argmax(probs)  # and now select the most likely audio waveform
    waveform = waveforms[most_probable]
    return waveform


css = """
        a {
            color: inherit; text-decoration: underline;
        } .gradio-container {
            font-family: 'IBM Plex Sans', sans-serif;
        } .gr-button {
            color: white; border-color: #000000; background: #000000;
        } input[type='range'] {
            accent-color: #000000;
        } .dark input[type='range'] {
            accent-color: #dfdfdf;
        } .container {
            max-width: 730px; margin: auto; padding-top: 1.5rem;
        } #gallery {
            min-height: 22rem; margin-bottom: 15px; margin-left: auto; margin-right: auto; border-bottom-right-radius:
            .5rem !important; border-bottom-left-radius: .5rem !important;
        } #gallery>div>.h-full {
            min-height: 20rem;
        } .details:hover {
            text-decoration: underline;
        } .gr-button {
            white-space: nowrap;
        } .gr-button:focus {
            border-color: rgb(147 197 253 / var(--tw-border-opacity)); outline: none; box-shadow:
            var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow, 0 0 #0000); --tw-border-opacity: 1;
            --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width)
            var(--tw-ring-offset-color); --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(3px
            var(--tw-ring-offset-width)) var(--tw-ring-color); --tw-ring-color: rgb(191 219 254 /
            var(--tw-ring-opacity)); --tw-ring-opacity: .5;
        } #advanced-btn {
            font-size: .7rem !important; line-height: 19px; margin-top: 12px; margin-bottom: 12px; padding: 2px 8px;
            border-radius: 14px !important;
        } #advanced-options {
            margin-bottom: 20px;
        } .footer {
            margin-bottom: 45px; margin-top: 35px; text-align: center; border-bottom: 1px solid #e5e5e5;
        } .footer>p {
            font-size: .8rem; display: inline-block; padding: 0 10px; transform: translateY(10px); background: white;
        } .dark .footer {
            border-color: #303030;
        } .dark .footer>p {
            background: #0b0f19;
        } .acknowledgments h4{
            margin: 1.25em 0 .25em 0; font-weight: bold; font-size: 115%;
        } #container-advanced-btns{
            display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
        } .animate-spin {
            animation: spin 1s linear infinite;
        } @keyframes spin {
            from {
                transform: rotate(0deg);
            } to {
                transform: rotate(360deg);
            }
        } #share-btn-container {
            display: flex; padding-left: 0.5rem !important; padding-right: 0.5rem !important; background-color:
            #000000; justify-content: center; align-items: center; border-radius: 9999px !important; width: 13rem;
            margin-top: 10px; margin-left: auto;
        } #share-btn {
            all: initial; color: #ffffff;font-weight: 600; cursor:pointer; font-family: 'IBM Plex Sans', sans-serif;
            margin-left: 0.5rem !important; padding-top: 0.25rem !important; padding-bottom: 0.25rem
            !important;right:0;
        } #share-btn * {
            all: unset;
        } #share-btn-container div:nth-child(-n+2){
            width: auto !important; min-height: 0px !important;
        } #share-btn-container .wrap {
            display: none !important;
        } .gr-form{
            flex: 1 1 50%; border-top-right-radius: 0; border-bottom-right-radius: 0;
        } #prompt-container{
            gap: 0;
        } #generated_id{
            min-height: 700px
        } #setting_id{
          margin-bottom: 12px; text-align: center; font-weight: 900;
        }
"""
iface = gr.Blocks(css=css)

with iface:
    gr.HTML(
        """
            <div style="text-align: center; max-width: 700px; margin: 0 auto;">
              <div
                style="
                  display: inline-flex; align-items: center; gap: 0.8rem; font-size: 1.75rem;
                "
              >
                <h1 style="font-weight: 900; margin-bottom: 7px; line-height: normal;">
                  AudioLDM: Text-to-Audio Generation with Latent Diffusion Models
                </h1>
              </div>
            </div>
        """
    )

    with gr.Group():
        with gr.Box():
            textbox = gr.Textbox(
                value="A hammer is hitting a wooden surface",
                max_lines=1,
                label="Input text",
                info="Your text is important for the audio quality. Please ensure it is descriptive by using more adjectives.",
                elem_id="prompt-in",
            )
            negative_textbox = gr.Textbox(
                value="low quality, average quality",
                max_lines=1,
                label="Negative prompt",
                info="Enter a negative prompt not to guide the audio generation. Selecting appropriate negative prompts can improve the audio quality significantly.",
                elem_id="prompt-in",
            )

            with gr.Accordion("Click to modify detailed configurations", open=False):
                seed = gr.Number(
                    value=45,
                    label="Seed",
                    info="Change this value (any integer number) will lead to a different generation result.",
                )
                duration = gr.Slider(2.5, 10, value=5, step=2.5, label="Duration (seconds)")
                guidance_scale = gr.Slider(
                    0,
                    4,
                    value=2.5,
                    step=0.5,
                    label="Guidance scale",
                    info="Large => better quality and relevancy to text; Small => better diversity",
                )
                n_candidates = gr.Slider(
                    1,
                    3,
                    value=3,
                    step=1,
                    label="Number waveforms to generate",
                    info="Automatic quality control. This number control the number of candidates (e.g., generate three audios and choose the best to show you). A Larger value usually lead to better quality with heavier computation",
                )

            outputs = gr.Video(label="Output", elem_id="output-video")
            btn = gr.Button("Submit").style(full_width=True)

        with gr.Group(elem_id="share-btn-container", visible=False):
            community_icon = gr.HTML(community_icon_html)
            loading_icon = gr.HTML(loading_icon_html)
            share_button = gr.Button("Share to community", elem_id="share-btn")

        btn.click(
            text2audio,
            inputs=[textbox, negative_textbox, duration, guidance_scale, seed, n_candidates],
            outputs=[outputs],
        )

        share_button.click(None, [], [], _js=share_js)
        gr.HTML(
            """
        <div class="footer" style="text-align: center; max-width: 700px; margin: 0 auto;">
                    <p>Follow the latest update of AudioLDM on our<a href="https://github.com/soulabi"
                    style="text-decoration: underline;" target="_blank"> Github repo</a> </p> <br>
        </div>
        """
        )
        gr.Examples(
            [
                ["A hammer is hitting a wooden surface", "low quality, average quality", 5, 2.5, 45, 3],
                ["Peaceful and calming ambient music with singing bowl and other instruments.", "low quality, average quality", 5, 2.5, 45, 3],
                ["A man is speaking in a small room.", "low quality, average quality", 5, 2.5, 45, 3],
                ["A female is speaking followed by footstep sound", "low quality, average quality", 5, 2.5, 45, 3],
                ["Wooden table tapping sound followed by water pouring sound.", "low quality, average quality", 5, 2.5, 45, 3],
            ],
            fn=text2audio,
            inputs=[textbox, negative_textbox, duration, guidance_scale, seed, n_candidates],
            outputs=[outputs],
            cache_examples=True,
        )
        gr.HTML(
            """
                <div class="acknowledgements"> <p>Essential Tricks for Enhancing the Quality of Your Generated
                Audio</p> <p>1. Try to use more adjectives to describe your sound. For example: "A man is speaking
                clearly and slowly in a large room" is better than "A man is speaking". This can make sure AudioLDM
                understands what you want.</p> <p>2. Try to use different random seeds, which can affect the generation
                quality significantly sometimes.</p> <p>3. It's better to use general terms like 'man' or 'woman'
                instead of specific names for individuals or abstract objects that humans may not be familiar with,
                such as 'mummy'.</p> <p>4. Using a negative prompt to not guide the diffusion process can improve the
                audio quality significantly. Try using negative prompts like 'low quality'.</p> </div>
                """
        )
        with gr.Accordion("Additional information", open=False):
            gr.HTML(
                """
                <div class="acknowledgments">
                    <p> We build the model with data from <a href="http://research.google.com/audioset/">AudioSet</a>,
                    <a href="https://freesound.org/">Freesound</a> and <a
                    href="https://sound-effects.bbcrewind.co.uk/">BBC Sound Effect library</a>. We share this demo
                    based on the <a
                    href="https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/375954/Research.pdf">UK
                    copyright exception</a> of data for academic research. </p>
                            </div>
                        """
            )
# <p>This demo is strictly for research demo purpose only. For commercial use please <a href="contact.soulabi@gmail.com">contact us</a>.</p>

iface.queue(max_size=10).launch(debug=True)