noads.py

# -*- coding: utf-8 -*-

# AWFUL synchronic version of NoSpotifyAds: the main idea is to detect silent
# into the stream and chunk it between of those silent. Then, if the chunk is
# between 25 and 35 seconds, instead of playing the ads we play a silent.

# OBVIOUS: it doesn't work! :)

# WHY?: it needs to be asynchronic. While we are playing, we need to detect
# silent and prepare the next chunk to be played.

# Once we start playing a song in Spotify, we need to wait at least a window of
# 40 seconds so 'noads.py' can start detecting the silents before start playing
# the current song.

from __future__ import division, print_function, unicode_literals

import pydub  # fades
import pydub.playback
import pydub.silence

SILENCE_THRESHOLD = -32
MIN_SILENCE_LENGHT = 3 * 1000  # 3 seconds

SEGMENENT_STREAM_LENGHT = 40 * 1000  # 40 seconds

MIN_SPOTIFY_ADS_THRESHOLD_LENGHT = 1 * 1000  # 1 seconds
MAX_SPOTIFY_ADS_THRESHOLD_LENGHT = 40 * 1000  # 40 seconds

FILEPATH = '/home/humitos/spotify-stream.ogg'  # example
SILENT_STREAM = pydub.AudioSegment.silent(duration=SEGMENENT_STREAM_LENGHT)  # to be played while ads

if __name__ == '__main__':
    print('Loading file...')
    stream = pydub.AudioSegment.from_ogg(FILEPATH)

    sample_nro = 0
    sample_length = len(stream)
    while sample_length >= SEGMENENT_STREAM_LENGHT:
        print('Spliting on silence...')
        segments = pydub.silence.split_on_silence(
            stream[sample_nro * SEGMENENT_STREAM_LENGHT:(sample_nro + 1) * SEGMENENT_STREAM_LENGHT],
            min_silence_len=3000, silence_thresh=-32)

        for s in segments:
            if MIN_SPOTIFY_ADS_THRESHOLD_LENGHT < len(s) < MAX_SPOTIFY_ADS_THRESHOLD_LENGHT:
                print('Playing silence...')
                pydub.playback.play(SILENT_STREAM)
            else:
                print('Playing music...')
                pydub.playback.play(s)

        sample_nro += 1
        sample_length -= SEGMENENT_STREAM_LENGHT
print('Quit.')