app.py

"""
Copyright (c) Meta Platforms, Inc. and affiliates.
All rights reserved.

This source code is licensed under the license found in the
LICENSE file in the root directory of this source tree.
"""

from tempfile import NamedTemporaryFile
import argparse
import torch
import gradio as gr
import os
import time
import warnings
from audiocraft.models import MusicGen
from audiocraft.data.audio import audio_write
from audiocraft.utils.extend import generate_music_segments, add_settings_to_image
import numpy as np
import random

MODEL = None
MODELS = None
IS_SHARED_SPACE = "musicgen/MusicGen" in os.environ.get('SPACE_ID', '')
IS_SHARED_SPACE = "musicgen/MusicGen" in os.environ.get('SPACE_ID', '')
INTERRUPTED = False
INTERRUPTED = False
UNLOAD_MODEL = False
UNLOAD_MODEL = False
MOVE_TO_CPU = False

def interrupt():
    global INTERRUPTING
    INTERRUPTING = True


def make_waveform(*args, **kwargs):
    # Further remove some warnings.
    be = time.time()
    with warnings.catch_warnings():
        warnings.simplefilter('ignore')
        out = gr.make_waveform(*args, **kwargs)
        print("Make a video took", time.time() - be)
        return out

def load_model(version):
    print("Loading model", version)
    return MusicGen.get_pretrained(version)


def predict(model, text, melody, duration, dimension, topk, topp, temperature, cfg_coef, background, title, include_settings, settings_font, settings_font_color, seed, overlap=1):
    global MODEL    
    output_segments = None
    topk = int(topk)
    if MODEL is None or MODEL.name != model:
        MODEL = load_model(model)

    output = None
    segment_duration = duration
    initial_duration = duration
    output_segments = []
    while duration > 0:
        if not output_segments: # first pass of long or short song
            if segment_duration > MODEL.lm.cfg.dataset.segment_duration:
                segment_duration = MODEL.lm.cfg.dataset.segment_duration
            else:
                segment_duration = duration
        else: # next pass of long song
            if duration + overlap < MODEL.lm.cfg.dataset.segment_duration:
                segment_duration = duration + overlap
            else:
                segment_duration = MODEL.lm.cfg.dataset.segment_duration
        # implement seed
        if seed < 0:
            seed = random.randint(0, 0xffff_ffff_ffff)
        torch.manual_seed(seed)

        print(f'Segment duration: {segment_duration}, duration: {duration}, overlap: {overlap}')
        MODEL.set_generation_params(
            use_sampling=True,
            top_k=topk,
            top_p=topp,
            temperature=temperature,
            cfg_coef=cfg_coef,
            duration=segment_duration,
        )

        if melody:
            # todo return excess duration, load next model and continue in loop structure building up output_segments
            if duration > MODEL.lm.cfg.dataset.segment_duration:
                output_segments, duration = generate_music_segments(text, melody, MODEL, seed, duration, overlap, MODEL.lm.cfg.dataset.segment_duration)
            else:
                # pure original code
                sr, melody = melody[0], torch.from_numpy(melody[1]).to(MODEL.device).float().t().unsqueeze(0)
                print(melody.shape)
                if melody.dim() == 2:
                    melody = melody[None]
                melody = melody[..., :int(sr * MODEL.lm.cfg.dataset.segment_duration)]
                output = MODEL.generate_with_chroma(
                    descriptions=[text],
                    melody_wavs=melody,
                    melody_sample_rate=sr,
                    progress=True
                )
            # All output_segments are populated, so we can break the loop or set duration to 0
            break
        else:
            #output = MODEL.generate(descriptions=[text], progress=False)
            if not output_segments:
                next_segment = MODEL.generate(descriptions=[text], progress=True)
                duration -= segment_duration
            else:
                last_chunk = output_segments[-1][:, :, -overlap*MODEL.sample_rate:]
                next_segment = MODEL.generate_continuation(last_chunk, MODEL.sample_rate, descriptions=[text], progress=True)
                duration -= segment_duration - overlap
            output_segments.append(next_segment)

    if output_segments:
        try:
            # Combine the output segments into one long audio file or stack tracks
            #output_segments = [segment.detach().cpu().float()[0] for segment in output_segments]
            #output = torch.cat(output_segments, dim=dimension)
            
            output = output_segments[0]
            for i in range(1, len(output_segments)):
                overlap_samples = overlap * MODEL.sample_rate
                output = torch.cat([output[:, :, :-overlap_samples], output_segments[i][:, :, overlap_samples:]], dim=dimension)
            output = output.detach().cpu().float()[0]
        except Exception as e:
            print(f"Error combining segments: {e}. Using the first segment only.")
            output = output_segments[0].detach().cpu().float()[0]
    else:
        output = output.detach().cpu().float()[0]
    with NamedTemporaryFile("wb", suffix=".wav", delete=False) as file:
        if include_settings:
            video_description = f"{text}\n Duration: {str(initial_duration)} Dimension: {dimension}\n Top-k:{topk} Top-p:{topp}\n Randomness:{temperature}\n cfg:{cfg_coef} overlap: {overlap}\n Seed: {seed}"
            background = add_settings_to_image(title, video_description, background_path=background, font=settings_font, font_color=settings_font_color)
        audio_write(
            file.name, output, MODEL.sample_rate, strategy="loudness",
            loudness_headroom_db=16, loudness_compressor=True, add_suffix=False)
        waveform_video = make_waveform(file.name,bg_image=background, bar_count=40)
    return waveform_video, seed


css="""
#col-container {max-width: 910px; margin-left: auto; margin-right: auto;}
a {text-decoration-line: underline; font-weight: 600;}
"""
with gr.Blocks(title="UnlimitedMusicGen", css=css) as demo:
    gr.Markdown(
        """
        # UnlimitedMusicGen
        This is your private demo for [UnlimitedMusicGen](https://github.com/Oncorporation/audiocraft), a simple and controllable model for music generation
        presented at: ["Simple and Controllable Music Generation"](https://huggingface.co/papers/2306.05284)
        """
    )
    if IS_SHARED_SPACE:
        gr.Markdown("""
            ⚠ This Space doesn't work in this shared UI ⚠

            <a href="https://huggingface.co/spaces/musicgen/MusicGen?duplicate=true" style="display: inline-block;margin-top: .5em;margin-right: .25em;" target="_blank">
            <img style="margin-bottom: 0em;display: inline;margin-top: -.25em;" src="https://bit.ly/3gLdBN6" alt="Duplicate Space"></a>
            to use it privately, or use the <a href="https://huggingface.co/spaces/facebook/MusicGen">public demo</a>
            """)
    with gr.Row():
        with gr.Column():
            with gr.Row():
                text = gr.Text(label="Input Text", interactive=True, value="4/4 100bpm 320kbps 48khz, Industrial/Electronic Soundtrack, Dark, Intense, Sci-Fi")
                melody = gr.Audio(source="upload", type="numpy", label="Melody Condition (optional)", interactive=True)
            with gr.Row():
                submit = gr.Button("Submit")
                # Adapted from https://github.com/rkfg/audiocraft/blob/long/app.py, MIT license.
                _ = gr.Button("Interrupt").click(fn=interrupt, queue=False)
            with gr.Row():
                background= gr.Image(value="./assets/background.png", source="upload", label="Background", shape=(768,512), type="filepath", interactive=True)
                include_settings = gr.Checkbox(label="Add Settings to background", value=True, interactive=True)
            with gr.Row():
                title = gr.Textbox(label="Title", value="UnlimitedMusicGen", interactive=True)
                settings_font = gr.Text(label="Settings Font", value="arial.ttf", interactive=True)
                settings_font_color = gr.ColorPicker(label="Settings Font Color", value="#ffffff", interactive=True)
            with gr.Row():
                model = gr.Radio(["melody", "medium", "small", "large"], label="Model", value="melody", interactive=True)
            with gr.Row():
                duration = gr.Slider(minimum=1, maximum=1000, value=10, label="Duration", interactive=True)
                overlap = gr.Slider(minimum=1, maximum=29, value=5, step=1, label="Overlap", interactive=True)
                dimension = gr.Slider(minimum=-2, maximum=2, value=2, step=1, label="Dimension", info="determines which direction to add new segements of audio. (1 = stack tracks, 2 = lengthen, -2..0 = ?)", interactive=True)
            with gr.Row():
                topk = gr.Number(label="Top-k", value=250, interactive=True)
                topp = gr.Number(label="Top-p", value=0, interactive=True)
                temperature = gr.Number(label="Randomness Temperature", value=1.0, precision=2, interactive=True)
                cfg_coef = gr.Number(label="Classifier Free Guidance", value=5.0, precision=2, interactive=True)
            with gr.Row():
                seed = gr.Number(label="Seed", value=-1, precision=0, interactive=True)
                gr.Button('\U0001f3b2\ufe0f').style(full_width=False).click(fn=lambda: -1, outputs=[seed], queue=False)
                reuse_seed = gr.Button('\u267b\ufe0f').style(full_width=False)
        with gr.Column() as c:
            output = gr.Video(label="Generated Music")
            seed_used = gr.Number(label='Seed used', value=-1, interactive=False)

    reuse_seed.click(fn=lambda x: x, inputs=[seed_used], outputs=[seed], queue=False)
    submit.click(predict, inputs=[model, text, melody, duration, dimension, topk, topp, temperature, cfg_coef, background, title, include_settings, settings_font, settings_font_color, seed, overlap], outputs=[output, seed_used])
    gr.Examples(
        fn=predict,
        examples=[
            [
                "An 80s driving pop song with heavy drums and synth pads in the background",
                "./assets/bach.mp3",
                "melody"
            ],
            [
                "A cheerful country song with acoustic guitars",
                "./assets/bolero_ravel.mp3",
                "melody"
            ],
            [
                "90s rock song with electric guitar and heavy drums",
                None,
                "medium"
            ],
            [
                "a light and cheerly EDM track, with syncopated drums, aery pads, and strong emotions",
                "./assets/bach.mp3",
                "melody"
            ],
            [
                "lofi slow bpm electro chill with organic samples",
                None,
                "medium",
            ],
        ],
        inputs=[text, melody, model],
        outputs=[output]
    )
    

demo.queue(max_size=32).launch()