app.py

import spaces
import argparse, os, sys, glob
import pathlib
directory = pathlib.Path(os.getcwd())
print(directory)
sys.path.append(str(directory))
import torch
import numpy as np
from omegaconf import OmegaConf
from PIL import Image
from tqdm import tqdm, trange
from ldm.util import instantiate_from_config
from ldm.models.diffusion.scheduling_lcm import LCMSampler
from ldm.models.diffusion.plms import PLMSSampler
import pandas as pd
from torch.utils.data import DataLoader 
from tqdm import tqdm
from icecream import ic
from pathlib import Path
import soundfile as sf
import yaml
import datetime
from vocoder.bigvgan.models import VocoderBigVGAN
import soundfile
# from pytorch_memlab import LineProfiler,profile
import gradio
import gradio as gr

def load_model_from_config(config, ckpt = None, verbose=True):
    model = instantiate_from_config(config.model)
    if ckpt:
        print(f"Loading model from {ckpt}")
        pl_sd = torch.load(ckpt, map_location="cpu")
        sd = pl_sd["state_dict"]
        
        m, u = model.load_state_dict(sd, strict=False)
        if len(m) > 0 and verbose:
            print("missing keys:")
            print(m)
        if len(u) > 0 and verbose:
            print("unexpected keys:")
            print(u)
    else:
        print(f"Note chat no ckpt is loaded !!!")

    model.cuda()
    model.eval()
    return model




class GenSamples:
    def __init__(self,sampler,model,outpath,vocoder = None,save_mel = True,save_wav = True, original_inference_steps=None, ddim_steps=2, scale=5, num_samples=1) -> None:
        self.sampler = sampler
        self.model = model
        self.outpath = outpath
        if save_wav:
            assert vocoder is not None
            self.vocoder = vocoder
        self.save_mel = save_mel
        self.save_wav = save_wav
        self.channel_dim = self.model.channels
        self.original_inference_steps = original_inference_steps
        self.ddim_steps = ddim_steps
        self.scale = scale
        self.num_samples = num_samples
    
    def gen_test_sample(self,prompt,mel_name = None,wav_name = None):# prompt is {'ori_caption':’xxx‘,'struct_caption':'xxx'}
        uc = None
        record_dicts = []
        # if os.path.exists(os.path.join(self.outpath,mel_name+f'_0.npy')):
        #     return record_dicts
        if self.scale != 1.0:
            emptycap = {'ori_caption':self.num_samples*[""],'struct_caption':self.num_samples*[""]}
            uc = self.model.get_learned_conditioning(emptycap)

        for n in range(1):# trange(self.opt.n_iter, desc="Sampling"):
            for k,v in prompt.items():
                prompt[k] = self.num_samples * [v]
            c = self.model.get_learned_conditioning(prompt)# shape:[1,77,1280],即还没有变成句子embedding，仍是每个单词的embedding
            if self.channel_dim>0:
                shape = [self.channel_dim, 20, 312]  # (z_dim, 80//2^x, 848//2^x)
            else:
                shape = [20, 312]
            samples_ddim, _ = self.sampler.sample(S=self.ddim_steps,
                                                conditioning=c,
                                                batch_size=self.num_samples,
                                                shape=shape,
                                                verbose=False,
                                                guidance_scale=self.scale,
                                                original_inference_steps=self.original_inference_steps
                                                )
            x_samples_ddim = self.model.decode_first_stage(samples_ddim)
            for idx,spec in enumerate(x_samples_ddim):
                spec = spec.squeeze(0).cpu().numpy()
                record_dict = {'caption':prompt['ori_caption'][0]}
                if self.save_mel:
                    mel_path = os.path.join(self.outpath,mel_name+f'_{idx}.npy')
                    np.save(mel_path,spec)
                    record_dict['mel_path'] = mel_path
                if self.save_wav:
                    wav = self.vocoder.vocode(spec)
                    wav_path = os.path.join(self.outpath,wav_name+f'_{idx}.wav')
                    soundfile.write(wav_path, wav, 16000)
                    record_dict['audio_path'] = wav_path
                record_dicts.append(record_dict)
        return record_dicts

@spaces.GPU(enable_queue=True)
def infer(ori_prompt, ddim_steps, num_samples, scale, seed):
    np.random.seed(seed)
    torch.manual_seed(seed)

    prompt = dict(ori_caption=ori_prompt,struct_caption=f'<{ori_prompt}& all>')


    config = OmegaConf.load("configs/audiolcm.yaml")

    # print("-------quick debug no load ckpt---------")
    # model = instantiate_from_config(config['model'])# for quick debug
    model = load_model_from_config(config, "./model/000184.ckpt")

    device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")
    model = model.to(device)

    sampler = LCMSampler(model)

    os.makedirs("results/test", exist_ok=True)

    vocoder = VocoderBigVGAN("./model/vocoder",device)


    generator = GenSamples(sampler,model,"results/test",vocoder,save_mel = False,save_wav = True, original_inference_steps=config.model.params.num_ddim_timesteps, ddim_steps=ddim_steps, scale=scale, num_samples=num_samples)
    csv_dicts = []

    with torch.no_grad():
        with model.ema_scope():
                wav_name = f'{prompt["ori_caption"].strip().replace(" ", "-")}'
                generator.gen_test_sample(prompt,wav_name=wav_name)

    print(f"Your samples are ready and waiting four you here: \nresults/test \nEnjoy.")
    return "results/test/"+wav_name+"_0.wav"

def my_inference_function(text_prompt, ddim_steps, num_samples, scale, seed):
    file_path = infer(text_prompt, ddim_steps, num_samples, scale, seed)
    return file_path


with gr.Blocks() as demo:
    with gr.Row():
        gr.Markdown("## AudioLCM：Text-to-Audio Generation with Latent Consistency Models")

    with gr.Row():
        with gr.Column():
            prompt = gr.Textbox(label="Prompt: Input your text here.        ")
            run_button = gr.Button()

            with gr.Accordion("Advanced options", open=False):
                num_samples = gr.Slider(
                    label="Select from audios num.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", minimum=1, maximum=10, value=1, step=1)
                ddim_steps = gr.Slider(label="ddim_steps", minimum=1,
                                       maximum=50, value=2, step=1)
                scale = gr.Slider(
                    label="Guidance Scale:(Large => more relevant to text but the quality may drop)", minimum=0.1, maximum=8.0, value=5.0, step=0.1
                )
                seed = gr.Slider(
                    label="Seed:Change this value (any integer number) will lead to a different generation result.",
                    minimum=0,
                    maximum=2147483647,
                    step=1,
                    value=44,
                )

        with gr.Column():
            outaudio = gr.Audio()
    
    run_button.click(fn=my_inference_function, inputs=[
                    prompt,ddim_steps, num_samples, scale, seed], outputs=[outaudio])
    with gr.Row():
        with gr.Column():
            gr.Examples(
                        examples = [['a dog barking and a bird chirping',2,1,5,55],['Pigeons peck, coo, and flap their wings before a man speaks',2,1,5,55],
                                        ['music of violin and piano',2,1,5,88],['wind thunder and rain falling',2,1,5,55],['music made by drum kit',2,1,5,55]],
                        inputs = [prompt,ddim_steps, num_samples, scale, seed],
                        outputs = [outaudio]
                        )
        with gr.Column():
            pass

demo.launch()


# gradio_interface = gradio.Interface(
#     fn = my_inference_function,
#     inputs = "text",
#     outputs = "audio"
# )
# gradio_interface.launch()