app.py

import json
import os
import shutil
import urllib.request
import zipfile
from argparse import ArgumentParser

import gradio as gr

from main import song_cover_pipeline

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

mdxnet_models_dir = os.path.join(BASE_DIR, 'mdxnet_models')
rvc_models_dir = os.path.join(BASE_DIR, 'rvc_models')
output_dir = os.path.join(BASE_DIR, 'song_output')


def get_current_models(models_dir):
    models_list = os.listdir(models_dir)
    items_to_remove = ['hubert_base.pt', 'MODELS.txt', 'public_models.json', 'rmvpe.pt']
    return [item for item in models_list if item not in items_to_remove]


def update_models_list():
    models_l = get_current_models(rvc_models_dir)
    return gr.Dropdown.update(choices=models_l)


def load_public_models():
    models_table = []
    for model in public_models['voice_models']:
        if not model['name'] in voice_models:
            model = [model['name'], model['description'], model['credit'], model['url'], ', '.join(model['tags'])]
            models_table.append(model)

    tags = list(public_models['tags'].keys())
    return gr.DataFrame.update(value=models_table), gr.CheckboxGroup.update(choices=tags)


def extract_zip(extraction_folder, zip_name):
    os.makedirs(extraction_folder)
    with zipfile.ZipFile(zip_name, 'r') as zip_ref:
        zip_ref.extractall(extraction_folder)
    os.remove(zip_name)

    index_filepath, model_filepath = None, None
    for root, dirs, files in os.walk(extraction_folder):
        for name in files:
            if name.endswith('.index') and os.stat(os.path.join(root, name)).st_size > 1024 * 100:
                index_filepath = os.path.join(root, name)

            if name.endswith('.pth') and os.stat(os.path.join(root, name)).st_size > 1024 * 1024 * 40:
                model_filepath = os.path.join(root, name)

    if not model_filepath:
        raise gr.Error(f'No .pth model file was found in the extracted zip. Please check {extraction_folder}.')

    # move model and index file to extraction folder
    os.rename(model_filepath, os.path.join(extraction_folder, os.path.basename(model_filepath)))
    if index_filepath:
        os.rename(index_filepath, os.path.join(extraction_folder, os.path.basename(index_filepath)))

    # remove any unnecessary nested folders
    for filepath in os.listdir(extraction_folder):
        if os.path.isdir(os.path.join(extraction_folder, filepath)):
            shutil.rmtree(os.path.join(extraction_folder, filepath))


def download_online_model(url, dir_name, progress=gr.Progress()):
    try:
        progress(0, desc=f'[~] Downloading voice model with name {dir_name}...')
        zip_name = url.split('/')[-1]
        extraction_folder = os.path.join(rvc_models_dir, dir_name)
        if os.path.exists(extraction_folder):
            raise gr.Error(f'Voice model directory {dir_name} already exists! Choose a different name for your voice model.')

        if 'pixeldrain.com' in url:
            url = f'https://pixeldrain.com/api/file/{zip_name}'

        urllib.request.urlretrieve(url, zip_name)

        progress(0.5, desc='[~] Extracting zip...')
        extract_zip(extraction_folder, zip_name)
        return f'[+] {dir_name} Model successfully downloaded!'

    except Exception as e:
        raise gr.Error(str(e))


def upload_local_model(zip_path, dir_name, progress=gr.Progress()):
    try:
        extraction_folder = os.path.join(rvc_models_dir, dir_name)
        if os.path.exists(extraction_folder):
            raise gr.Error(f'Voice model directory {dir_name} already exists! Choose a different name for your voice model.')

        zip_name = zip_path.name
        progress(0.5, desc='[~] Extracting zip...')
        extract_zip(extraction_folder, zip_name)
        return f'[+] {dir_name} Model successfully uploaded!'

    except Exception as e:
        raise gr.Error(str(e))


def filter_models(tags, query):
    models_table = []

    # no filter
    if len(tags) == 0 and len(query) == 0:
        for model in public_models['voice_models']:
            models_table.append([model['name'], model['description'], model['credit'], model['url'], model['tags']])

    # filter based on tags and query
    elif len(tags) > 0 and len(query) > 0:
        for model in public_models['voice_models']:
            if all(tag in model['tags'] for tag in tags):
                model_attributes = f"{model['name']} {model['description']} {model['credit']} {' '.join(model['tags'])}".lower()
                if query.lower() in model_attributes:
                    models_table.append([model['name'], model['description'], model['credit'], model['url'], model['tags']])

    # filter based on only tags
    elif len(tags) > 0:
        for model in public_models['voice_models']:
            if all(tag in model['tags'] for tag in tags):
                models_table.append([model['name'], model['description'], model['credit'], model['url'], model['tags']])

    # filter based on only query
    else:
        for model in public_models['voice_models']:
            model_attributes = f"{model['name']} {model['description']} {model['credit']} {' '.join(model['tags'])}".lower()
            if query.lower() in model_attributes:
                models_table.append([model['name'], model['description'], model['credit'], model['url'], model['tags']])

    return gr.DataFrame.update(value=models_table)


def pub_dl_autofill(pub_models, event: gr.SelectData):
    return gr.Text.update(value=pub_models.loc[event.index[0], 'URL']), gr.Text.update(value=pub_models.loc[event.index[0], 'Model Name'])


def swap_visibility():
    return gr.update(visible=True), gr.update(visible=False), gr.update(value=''), gr.update(value=None)


def process_file_upload(file):
    return file.name, gr.update(value=file.name)


def show_hop_slider(pitch_detection_algo):
    if pitch_detection_algo == 'mangio-crepe':
        return gr.update(visible=True)
    else:
        return gr.update(visible=False)


if __name__ == '__main__':
    parser = ArgumentParser(description='Generate a AI cover song in the song_output/id directory.', add_help=True)
    parser.add_argument("--share", action="store_true", dest="share_enabled", default=False, help="Enable sharing")
    parser.add_argument("--listen", action="store_true", default=False, help="Make the WebUI reachable from your local network.")
    parser.add_argument('--listen-host', type=str, help='The hostname that the server will use.')
    parser.add_argument('--listen-port', type=int, help='The listening port that the server will use.')
    args = parser.parse_args()

    voice_models = get_current_models(rvc_models_dir)
    with open(os.path.join(rvc_models_dir, 'public_models.json'), encoding='utf8') as infile:
        public_models = json.load(infile)



with gr.Blocks(theme=gr.themes.Base()) as app:
    with gr.Tab("Inference"):
        with gr.Row():
            rvc_model = gr.Dropdown(voice_models, label='Voice Models', info='Models folder "AICoverGen --> rvc_models". After new models are added into this folder, click the refresh button')
            ref_btn = gr.Button('Refresh Models 🔁', variant='primary')

            with gr.Column():
              pitch = gr.Slider(-3, 3, value=0, step=1, label='Pitch Change (Vocals ONLY)', info='Generally, use 1 for male to female conversions and -1 for vice-versa. (Octaves)')
              pitch_all = gr.Slider(-12, 12, value=0, step=1, label='Overall Pitch Change', info='Changes pitch/key of vocals and instrumentals together. Altering this slightly reduces sound quality. (Semitones)')
                    
            
            generate_btn = gr.Button("Generate", variant='primary')
        with gr.Row():
            
            with gr.Column() as yt_link_col:
              song_input = gr.Text(label='Song input', info='Link to a song on YouTube or full path to a local file. For file upload, click the button below.')
              show_file_upload_button = gr.Button('Upload file instead')
            with gr.Column(visible=False) as file_upload_col:
              local_file = gr.File(label='Audio file')
              song_input_file = gr.UploadButton('Upload 📂', file_types=['audio'], variant='primary')
              show_yt_link_button = gr.Button('Paste YouTube link/Path to local file instead')
              song_input_file.upload(process_file_upload, inputs=[song_input_file], outputs=[local_file, song_input])

            show_file_upload_button.click(swap_visibility, outputs=[file_upload_col, yt_link_col, song_input, local_file])
            show_yt_link_button.click(swap_visibility, outputs=[yt_link_col, file_upload_col, song_input, local_file])

            
            with gr.Column():
                with gr.Accordion(label="Feature Settings", open=False):
                    index_rate = gr.Slider(0, 1, value=0.5, label='Index Rate', info="Controls how much of the AI voice's accent to keep in the vocals")
                    filter_radius = gr.Slider(0, 7, value=3, step=1, label='Filter radius', info='If >=3: apply median filtering median filtering to the harvested pitch results. Can reduce breathiness')
                    rms_mix_rate = gr.Slider(0, 1, value=0.25, label='RMS mix rate', info="Control how much to mimic the original vocal's loudness (0) or a fixed loudness (1)")
                    protect = gr.Slider(0, 0.5, value=0.33, label='Protect rate', info='Protect voiceless consonants and breath sounds. Set to 0.5 to disable.')
                with gr.Row():
                    
                    ai_cover = gr.Audio(label='Output Audio (Click on the Three Dots in the Right Corner to Download)', show_share_button=False)
                    
                with gr.Row():
                    f0_method = gr.Dropdown(['rmvpe', 'mangio-crepe'], value='rmvpe', label='Pitch detection algorithm', info='Best option is rmvpe (clarity in vocals), then mangio-crepe (smoother vocals)')
                    crepe_hop_length = gr.Slider(32, 320, value=128, step=1, visible=False, label='Crepe hop length', info='Lower values leads to longer conversions and higher risk of voice cracks, but better pitch accuracy.')
                    f0_method.change(show_hop_slider, inputs=f0_method, outputs=crepe_hop_length)
                keep_files = gr.Checkbox(label='Keep intermediate files', info='Keep all audio files generated in the song_output/id directory, e.g. Isolated Vocals/Instrumentals. Leave unchecked to save space')

        clear_btn = gr.ClearButton(value='Clear', components=[song_input, rvc_model, keep_files, local_file])
        with gr.Row():
            output_format = gr.Dropdown(['mp3', 'wav'], value='mp3', label='Output file type', info='mp3: small file size, decent quality. wav: Large file size, best quality')
        with gr.Row():
            instructions = gr.Markdown("""
                This is simply a modified version of the RVC GUI found here: 
                https://github.com/RVC-Project/Retrieval-based-Voice-Conversion-WebUI
                """)

        with gr.Row():
            ref_btn.click(update_models_list, inputs=None, outputs=rvc_model)
            is_webui = gr.Number(value=1, visible=False)
            generate_btn.click(song_cover_pipeline,
                               inputs=[song_input, rvc_model, pitch, keep_files, is_webui,
                                       index_rate, filter_radius, rms_mix_rate, f0_method, crepe_hop_length,
                                       protect, pitch_all,output_format],
                               outputs=[ai_cover])
            clear_btn.click(lambda: [0, 0, 0, 0, 0.5, 3, 0.25, 0.33, 'rmvpe', 128, 0, 0.15, 0.2, 0.8, 0.7, 'mp3', None],
                            outputs=[pitch, index_rate, filter_radius, rms_mix_rate,
                                     protect, f0_method, crepe_hop_length, pitch_all,                       
                                     output_format, ai_cover])
    with gr.Tab("Download Model"):
        with gr.Row():
            url=gr.Textbox(label="Enter the URL to the Model:")
        with gr.Row():
            model = gr.Textbox(label="Name your model:")
            download_button=gr.Button(label="Download")
        with gr.Row():
            status_bar=gr.Textbox(label="")
            download_button.click(download_online_model, inputs=[url, model], outputs=status_bar)

    app.queue()
    app.launch(share=True, debug=True)