Python Wave Audio Loop

audio.py

import os
import wave
import threading
import sys

# PyAudio Library
import pyaudio

class WavePlayerLoop(threading.Thread) :
  """
  A simple class based on PyAudio to play wave loop.

  It's a threading class. You can play audio while your application
  continues to do its stuff. :)
  """

  CHUNK = 1024

  def __init__(self,filepath,loop=True) :
    """
    Initialize `WavePlayerLoop` class.

    PARAM:
        -- filepath (String) : File Path to wave file.
        -- loop (boolean)    : True if you want loop playback. 
                               False otherwise.
    """
    super(WavePlayerLoop, self).__init__()
    self.filepath = os.path.abspath(filepath)
    self.loop = loop

  def run(self):
    # Open Wave File and start play!
    wf = wave.open(self.filepath, 'rb')
    player = pyaudio.PyAudio()

    # Open Output Stream (basen on PyAudio tutorial)
    stream = player.open(format = player.get_format_from_width(wf.getsampwidth()),
        channels = wf.getnchannels(),
        rate = wf.getframerate(),
        output = True)

    # PLAYBACK LOOP
    data = wf.readframes(self.CHUNK)
    while self.loop :
      stream.write(data)
      data = wf.readframes(self.CHUNK)
      if data == b'' : # If file is over then rewind.
        wf.rewind()
        data = wf.readframes(self.CHUNK)

    stream.close()
    player.terminate()


  def play(self) :
    """
    Just another name for self.start()
    """
    self.start()

  def stop(self) :
    """
    Stop playback. 
    """
    self.loop = False

player = WavePlayerLoop("sounds/1.wav")
player.play()

@411736

Note that it will be

if data == b''
instead of
if data == ''

in the newest version of Python

What if you would insert some delay between two repetitions ?
Thanks for this work !

@benoitvalery

Just add a time.sleep(x) (where x is the number of seconds you want to delay) at the end of the while loop in line 45. time.sleep blocks the thread, not the process. :)

Thank you for your response. I modified your code, removing the loop side, and adding a play_once() function, that I call on demand. It suits my needs very well. Thanks again.

@THeK3nger

Somehow I can't seem to get the audio to loop. I copy-pasted your code word-for-word and yet it stops right after it finishes. Please help :(

edit: I managed to make it work somehow. the data != '' doesn't seem to on my laptop so instead i wrote it so that when len(data)==0, break from the loop. Would appreciate if you knew a more elegant method.

Did you see the previous comment by nik312123 ?

Note that it will be

if data == b''
instead of
if data == ''

in the newest version of Python

I updated the main file to fix this. Thank you all. :)

@benoitvalery
Ah, thanks for that. somehow i read that comment the other way round.
@THeK3nger
Thanks a lot :D

Hello, i have the same problem:

Sorry I am a beginner programmer and I am wondering where to insert the .wav file and if this will play the file or just loop it

Do I have to insert the file AND my local file path here?

def run(self):
# Open Wave File and start play!
wf = wave.open(self.filepath, 'rb')
player = pyaudio.PyAudio()

I tried different options but nothing is working..

@leamu no you have to use it outside the class like this:

import os
import wave
import threading
import sys

# PyAudio Library
import pyaudio

class WavePlayerLoop(threading.Thread):
    CHUNK = 1024

    def __init__(self, filepath, loop=True):
        """
        Initialize `WavePlayerLoop` class.
        PARAM:
            -- filepath (String) : File Path to wave file.
            -- loop (boolean)    : True if you want loop playback.
                                   False otherwise.
        """
        super(WavePlayerLoop, self).__init__()
        self.filepath = os.path.abspath(filepath)
        self.loop = loop

    def run(self):
        # Open Wave File and start play!
        wf = wave.open(self.filepath, 'rb')
        player = pyaudio.PyAudio()

        # Open Output Stream (based on PyAudio tutorial)
        stream = player.open(format=player.get_format_from_width(wf.getsampwidth()),
                             channels=wf.getnchannels(),
                             rate=wf.getframerate(),
                             output=True)

        # PLAYBACK LOOP
        data = wf.readframes(self.CHUNK)
        while self.loop:
            stream.write(data)
            data = wf.readframes(self.CHUNK)
            if data == b'':  # If file is over then rewind.
                wf.rewind()
                data = wf.readframes(self.CHUNK)

        stream.close()
        player.terminate()

    def play(self):
        """
        Just another name for self.start()
        """
        self.start()

    def stop(self):
        """
        Stop playback.
        """
        self.loop = False

player = WavePlayerLoop("sounds/1.wav")
player.play()

I also wanted to ask that, how can we play all the songs from a particular folder, in python because as a beginner I'm facing a problem with that,

currently, I'm using the code -

elif 'play some music' in query:
music_dir = 'D:\Music'
songs = os.listdir(music_dir)
print(songs)
os.startfile(os.path.join(music_dir, songs[0]))

But this only plays the 1st song, [0]

if anyone knows - how to play all the songs then, please help,

thanks

insta - im__ace_