tunebox.py

#!/usr/bin/env python

import RPi.GPIO as GPIO
import time
import subprocess
import glob
import os
import shutil


GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.IN)


def call(cmd):
    print(' '.join(cmd))
    subprocess.call(cmd)


def mount_drives():
    for c in 'abcd':
        mnt = '/mnt/tunebox' + c
        if not os.path.ismount(mnt):
            call(['mount', mnt])


def merge_sounds():
    ''' Return True if we have a sound file to play '''
    found = []
    for f in glob.glob('/mnt/tunebox*/*'):
        if f.endswith('.wav'):
            found.append(f)
    try:
        os.remove('/tmp/out.wav')
    except OSError:
        pass
    if len(found) == 1:
        call(['cp'] + found + ['/tmp/out.wav'])
        return True
    elif len(found) > 1:
        call(['sox', '-m'] + found[:2] + ['/tmp/out1.wav'])
        shutil.copyfile('/tmp/out1.wav', '/tmp/out.wav')
        if len(found) > 2:
            for i in range(2, len(found)):
                call(['sox', '-m', '/tmp/out%d.wav' % (i - 1), found[i], '/tmp/out%d.wav' % i])
                shutil.copyfile('/tmp/out%d.wav' % i, '/tmp/out.wav')
        return True
    return False


def play_sounds():
    mount_drives()
    if merge_sounds():
        call(['play', '/tmp/out.wav'])


def main():
    while True:
        time.sleep(0.1)
        if GPIO.input(18):
            # Try again to make sure
            time.sleep(0.01)
            if GPIO.input(18):
                play_sounds()


if __name__ == '__main__':
    main()