play.py

from mido import MidiFile, MetaMessage
import sys
from pathlib import Path
from time import sleep
import ntpath
import pyautogui
from pyautogui import press
import PySimpleGUI as sg
import os.path
import _thread

def note2freq(x):
    """
        Convert a MIDI note into a frequency (given in Hz)
    """
    a = 440
    b = (a/32) * (2 ** ((x-9)/12))
    b = round(b)
    keystroke = '\t\t keystroke "'
    #NOT USED -- start
    if b == 1864:
        return 'j'
    elif b == 1760:
        return '8'
    elif b == 1568:
        return '5'
    elif b == 1397:
        return '4'
    elif b == 1319:
        return '3'
    elif b == 1175:
        return '2'
    elif b == 1047:
        return '8'
    elif b == 988:
        return '7'
    elif b == 932:
        return 'j'
    elif b == 880:
        return '6'
    elif b == 831:
        return 'h'
    elif b == 784:
        return '5'
    elif b == 740:
        return 'g'
    elif b == 698:
        return '4'
    elif b == 659:
        return '3'
    elif b == 622:
        return 'f'
    elif b == 587:
        return '2'
    elif b == 554:
        return 'd'
    elif b == 523:
        return '1'
    elif b == 494:
        return 't'
    elif b == 466:
        return 'c'
    elif b == 440:
        return'r'
    elif b == 415:
        return 'x'
    elif b == 392:
        return  'e'
    elif b == 370:
        return 'z'
    elif b == 349:
        return  'w'
    elif b == 330:
        return 'q'
    elif b == 311:
        return 'l'
    elif b == 294:
        return '0'
    elif b == 277:
        return 'k'
    elif b == 262:
        return  '9'
    elif b == 247:
        return  's'
    elif b == 233:
        return  '.'
    elif b == 220:
        return  'a'
    elif b == 208:
        return 'm'
    elif b == 196:
        return  'p'
    elif b == 185:
        return  'n'
    elif b == 175:
        return 'o'
    elif b == 165:
        return 'i'
    elif b == 156:
        return 'b'
    elif b == 147:
        return  'u'
    elif b == 139:
        return 'v'
    elif b == 131:
        return  'y'
    else:
        keystroke += ' NOT FOUND'
    keystroke += ', freq: ' + str(b)
    return keystroke

def readFiles(f):
    folder = f
    try:
        # Get list of files in folder
        file_list = os.listdir(folder)
    except:
        file_list = []

    fnames = [
        f
        for f in file_list
        if os.path.isfile(os.path.join(folder, f))
        and f.lower().endswith((".mid", ".midi"))
    ]
    return fnames

def playMidi(filename):
    pyautogui.PAUSE = 0.05
    # Import the MIDI file...
    mid = MidiFile(filename)
    if mid.type == 3:
        print("Unsupported type.")
        exit(3)

    # wait 3 seconds to switch window
    sleep(3)

    try:
        for msg in mid.play():
            if hasattr(msg, 'velocity'):
                #print(msg)
                window.refresh()
                if int(msg.velocity) > 0:
                    press(note2freq(msg.note))
            if stop == True:
                break
        window["-STOP-"].update(disabled=True)
    except KeyboardInterrupt:
        print('quit')
        sys.exit()

## GUI

# First the window layout in 2 columns

file_list_column = [
    [
        sg.Text("Choose Songs Folder"),
        sg.In("", size=(25, 1), enable_events=True, key="-FOLDER-"),
        sg.FolderBrowse(),
    ],
    [
        sg.Listbox(
            values=[], enable_events=True, size=(40, 20), key="-FILE LIST-"
        )
    ],
]

# For now will only show the name of the file that was chosen
image_viewer_column = [
    [sg.Text("Selected file:")],
    [sg.Text(size=(40, 1), key="-TOUT-")],
    [sg.Button('Play !', enable_events=True, key="-PLAY-", disabled=True)],
    [sg.Button('Stop', enable_events=True, key="-STOP-", disabled=True)]
]

# ----- Full layout -----
layout = [
    [
        sg.Column(file_list_column),
        sg.VSeperator(),
        sg.Column(image_viewer_column),
    ]
]

window = sg.Window("BardMac-sicPlayer", layout)

# Run the Event Loop

stop = False

while True:
    event, values = window.read()
    stop = False
    if event == "Exit" or event == sg.WIN_CLOSED:
        stop = True
        break
    # Folder name was filled in, make a list of files in the folder
    if event == "-FOLDER-":
        window["-FILE LIST-"].update(readFiles(values["-FOLDER-"]))
        window["-TOUT-"].update('')
        window["-PLAY-"].update(disabled=True)

    elif event == "-FILE LIST-":  # A file was chosen from the listbox
        try:
            filename = os.path.join(
                values["-FOLDER-"], values["-FILE LIST-"][0]
            )
            window["-TOUT-"].update(values["-FILE LIST-"][0])
            window["-PLAY-"].update(disabled=False)
        except:
            pass

    elif event == "-PLAY-": # Play button pressed
        window["-STOP-"].update(disabled=False)
        _thread.start_new_thread(playMidi,(filename,))

    elif event == "-STOP-":  # Stop button pressed
        stop = True
        window["-STOP-"].update(disabled=True)

window.close()