convert.py

import os
import sys
import fitz
import subprocess
from PIL import Image
from music21 import converter
from utils import download

if sys.platform.startswith('linux'):
    apkname = 'MuseScore.AppImage'
    extra_dir = 'squashfs-root'
    download(
        filename=apkname,
        url='https://cdn.jsdelivr.net/musescore/v4.2.0/MuseScore-4.2.0.233521125-x86_64.AppImage'
    )
    if not os.path.exists(extra_dir):
        subprocess.run(['chmod', '+x', f'./{apkname}'])
        subprocess.run([f'./{apkname}', '--appimage-extract'])

    mscore = f'./{extra_dir}/AppRun'
    os.environ['QT_QPA_PLATFORM'] = 'offscreen'

else:
    mscore = "D:/Program Files/MuseScore 3/bin/MuseScore3.exe"


def abc_to_midi(abc_content, output_midi_path):
    score = converter.parse(abc_content, format='abc')
    score.write('midi', fp=output_midi_path)
    return output_midi_path


def abc_to_musicxml(abc_content, output_xml_path):
    score = converter.parse(abc_content, format='abc')
    score.write('musicxml', fp=output_xml_path)
    return output_xml_path


def musicxml_to_mxl(xml_path):
    mxl_file = xml_path.replace('.musicxml', '.mxl')
    command = [mscore, "-o", mxl_file, xml_path]
    result = subprocess.run(command)
    print(result)
    return mxl_file


def midi2wav(mid_file: str):
    wav_file = mid_file.replace('.mid', '.wav')
    command = [mscore, "-o", wav_file, mid_file]
    result = subprocess.run(command)
    print(result)
    return wav_file


def pdf2img(pdf_path: str):
    output_path = pdf_path.replace('.pdf', '.jpg')
    doc = fitz.open(pdf_path)
    # 创建一个图像列表
    images = []
    for page_number in range(doc.page_count):
        page = doc[page_number]
        # 将页面渲染为图像
        image = page.get_pixmap()
        # 将图像添加到列表
        images.append(
            Image.frombytes(
                "RGB",
                [image.width, image.height],
                image.samples
            )
        )
    # 竖向合并图像
    merged_image = Image.new(
        "RGB",
        (images[0].width, sum(image.height for image in images))
    )
    y_offset = 0
    for image in images:
        merged_image.paste(image, (0, y_offset))
        y_offset += image.height
    # 保存合并后的图像为JPG
    merged_image.save(output_path, "JPEG")
    # 关闭PDF文档
    doc.close()
    return output_path


def mxl2jpg(mxl_file: str):
    pdf_score = mxl_file.replace('.mxl', '.pdf')
    command = [mscore, "-o", pdf_score, mxl_file]
    result = subprocess.run(command)
    print(result)
    return pdf_score, pdf2img(pdf_score)