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import os
import subprocess
import re
from random import randint
from sys import platform
from logzero import logger
CONFIDENCE_THRESH = 0.02
class VaporSong:
# Slows down Track
def slow_down(src, rate, dest):
cmd = "sox -G -D " + src + " " + dest + " speed " + str(rate)
os.system(cmd)
return dest
# Adds Reverb
def reverbize(src, dest):
cmd = (
"sox -G -D " + src + " " + dest + " reverb 100 fade 5 -0 7"
) # idk what this does tbh, https://stackoverflow.com/a/57767238/8386344
os.system(cmd)
return dest
# Crops "src" from "start" plus "start + dur" and return it in "dest"
def crop(src, dest, start, dur):
cmd = "sox " + src + " " + dest + " trim " + " " + str(start) + " " + str(dur)
os.system(cmd)
# Randomly crops a part of the song of at most max_sec_len.
def random_crop(src, max_sec_len, dest):
out = subprocess.check_output(["soxi", "-D", src]).rstrip()
f_len = int(float(out))
if f_len <= max_sec_len:
os.system("cp " + src + " " + dest)
return
else:
start_region = f_len - max_sec_len
start = randint(0, start_region)
VaporSong.crop(src, dest, start, max_sec_len)
# Given a file, returns a list of [beats, confidence], executable based on audibo's test-beattracking.c
# TODO: Move away from executable and use aubio's Python module
def fetchbeats(src):
beat_matrix = []
if platform == "darwin":
beats = subprocess.check_output(["noah", "get-beats", src]).rstrip()
else:
beats = subprocess.check_output(["./get-beats", src]).rstrip()
beats_ary = beats.splitlines()
for i in beats_ary:
record = i.split()
record[0] = float(record[0]) / 1000.0
record[1] = float(record[1])
beat_matrix.append(record)
return beat_matrix
# Splits an audio file into beats according to beat_matrix list
def split_beat(src, beat_matrix):
split_files = []
for i in range(0, len(beat_matrix) - 1):
if beat_matrix[i][1] > CONFIDENCE_THRESH:
dur = beat_matrix[i + 1][0] - beat_matrix[i][0]
out = src.split(".")[0] + str(i) + ".wav"
VaporSong.crop(src, out, beat_matrix[i][0], dur)
split_files.append(out)
return split_files
# Combines a list of sections
def combine(sections, dest):
tocomb = []
tocomb.append("sox")
tocomb.append("-G")
for section in sections:
for sample in section:
tocomb.append(sample)
tocomb.append(dest)
tmpFileLimit = (
len(tocomb) + 256
) # in case the program messes up, it does not actually frick up your system
n = str(tmpFileLimit)
# logger.info("Setting file limit to ", n)
os.system("ulimit -n " + n)
subprocess.check_output(tocomb)
return dest
# Arbitrarily groups beats into lists of 4, 6, 8, or 9, perfect for looping.
def generate_sections(ary):
sections = []
beats = [4, 6, 8, 9]
index = 0
while index != len(ary):
current_beat = beats[randint(0, len(beats) - 1)]
new_section = []
while (current_beat != 0) and (index != len(ary)):
new_section.append(ary[index])
current_beat -= 1
index += 1
sections.append(new_section)
return sections
# given a list of sections, selects some of them and duplicates them, perfect for that vaporwave looping effect
def dup_sections(sections):
new_section = []
for section in sections:
new_section.append(section)
if randint(0, 1) == 0:
new_section.append(section)
return new_section
# a passage is a list of sections. This takes some sections and groups them into passages.
def make_passages(sections):
passages = []
index = 0
while index != len(sections):
passage_len = randint(1, 4)
passage = []
while index != len(sections) and passage_len > 0:
passage.append(sections[index])
index += 1
passage_len -= 1
passages.append(passage)
return passages
# Given all of our passages, picks some of them and inserts them into a list some number of times.
def reorder_passages(passages):
new_passages = []
passage_count = randint(5, 12)
while passage_count != 0:
passage = passages[randint(0, len(passages) - 1)]
passage_count -= 1
dup = randint(1, 4)
while dup != 0:
dup -= 1
new_passages.append(passage)
return new_passages
# converts a list of passages to a list of sections.
def flatten(passages):
sections = []
for passage in passages:
for section in passage:
sections.append(section)
return sections
# It's all coming together
def vaporize_song(fname, title):
logger.info("Slowing down the music")
VaporSong.slow_down(fname, 0.7, "beats/out.wav")
# logger.info("Cropping")
# VaporSong.random_crop("beats/out.wav",150,"beats/outcrop.wav")
logger.info("Doing Beat Analysis")
bm = VaporSong.fetchbeats("beats/out.wav")
logger.info("Split into beats")
splitd = VaporSong.split_beat("beats/out.wav", bm)
# group beats to sections
logger.info("Divide into sections")
sections = VaporSong.generate_sections(splitd)
logger.info("Duping Sections")
sdup = VaporSong.dup_sections(sections)
# group sections into passages
paslist = VaporSong.make_passages(sdup)
# reorder packages
pasloop = VaporSong.reorder_passages(paslist)
sectionflat = VaporSong.flatten(pasloop)
logger.info("Mastering & Reverbing")
VaporSong.combine(sectionflat, "beats/out_norev.wav")
VaporSong.reverbize(
"beats/out_norev.wav",
"./" + (re.sub(r"\W+|_", " ", title)).replace(" ", "_") + ".wav",
)
logger.info("Generated V A P O R W A V E")
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