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import sys
import io
import os
from PyQt4 import QtCore, QtGui, uic
from os.path import expanduser
import subprocess as sp
import numpy
from PIL import Image
#import tempfile
from shutil import rmtree
#import atexit
import time
from collections import OrderedDict
import json
from importlib import import_module
from PyQt4.QtGui import QDesktopServices
import string
class Core():
def __init__(self):
self.FFMPEG_BIN = self.findFfmpeg()
#self.tempDir = os.path.join(
# tempfile.gettempdir(), 'audio-visualizer-python-data')
#if not os.path.exists(self.tempDir):
# os.makedirs(self.tempDir)
#atexit.register(self.deleteTempDir)
self.dataDir = QDesktopServices.storageLocation(
QDesktopServices.DataLocation)
self.presetDir = os.path.join(self.dataDir, 'presets')
self.wd = os.path.dirname(os.path.realpath(__file__))
self.loadEncoderOptions()
self.modules = self.findComponents()
self.selectedComponents = []
self.selectedModules = []
def findComponents(self):
def findComponents():
srcPath = os.path.join(self.wd, 'components')
if os.path.exists(srcPath):
for f in sorted(os.listdir(srcPath)):
name, ext = os.path.splitext(f)
if name.startswith("__"):
continue
elif ext == '.py':
yield name
return [
import_module('components.%s' % name)
for name in findComponents()]
def insertComponent(self, compPos, moduleIndex):
if compPos < 0:
compPos = len(self.selectedComponents) -1
self.selectedComponents.insert(
compPos,
self.modules[moduleIndex].Component()
)
self.selectedModules.insert(
compPos,
moduleIndex
)
return compPos
def moveComponent(self, startI, endI):
comp = self.selectedComponents.pop(startI)
self.selectedComponents.insert(endI, comp)
i = self.selectedModules.pop(startI)
self.selectedModules.insert(endI, i)
return endI
def updateComponent(self, i):
print('updating %s' % self.selectedComponents[i])
self.selectedComponents[i].update()
def moduleIndexFor(self, compIndex):
return self.selectedModules[compIndex]
def createPresetFile(self, compName, vers, saveValueStore, filename):
dirname = os.path.join(self.presetDir, compName, str(vers))
if not os.path.exists(dirname):
os.makedirs(dirname)
filepath = os.path.join(dirname, filename)
with open(filepath, 'w') as f:
f.write(Core.stringOrderedDict(saveValueStore))
def loadEncoderOptions(self):
file_path = os.path.join(self.wd, 'encoder-options.json')
with open(file_path) as json_file:
self.encoder_options = json.load(json_file)
def findFfmpeg(self):
if sys.platform == "win32":
return "ffmpeg.exe"
else:
try:
with open(os.devnull, "w") as f:
sp.check_call(['ffmpeg', '-version'], stdout=f, stderr=f)
return "ffmpeg"
except:
return "avconv"
def readAudioFile(self, filename, parent):
command = [self.FFMPEG_BIN, '-i', filename]
try:
fileInfo = sp.check_output(command, stderr=sp.STDOUT, shell=False)
except sp.CalledProcessError as ex:
fileInfo = ex.output
pass
info = fileInfo.decode("utf-8").split('\n')
for line in info:
if 'Duration' in line:
d = line.split(',')[0]
d = d.split(' ')[3]
d = d.split(':')
duration = float(d[0])*3600 + float(d[1])*60 + float(d[2])
command = [
self.FFMPEG_BIN,
'-i', filename,
'-f', 's16le',
'-acodec', 'pcm_s16le',
'-ar', '44100', # ouput will have 44100 Hz
'-ac', '1', # mono (set to '2' for stereo)
'-']
in_pipe = sp.Popen(
command, stdout=sp.PIPE, stderr=sp.DEVNULL, bufsize=10**8)
completeAudioArray = numpy.empty(0, dtype="int16")
progress = 0
lastPercent = None
while True:
if self.canceled:
break
# read 2 seconds of audio
progress = progress + 4
raw_audio = in_pipe.stdout.read(88200*4)
if len(raw_audio) == 0:
break
audio_array = numpy.fromstring(raw_audio, dtype="int16")
completeAudioArray = numpy.append(completeAudioArray, audio_array)
percent = int(100*(progress/duration))
if percent >= 100:
percent = 100
if lastPercent != percent:
string = 'Loading audio file: '+str(percent)+'%'
parent.progressBarSetText.emit(string)
parent.progressBarUpdate.emit(percent)
lastPercent = percent
in_pipe.kill()
in_pipe.wait()
# add 0s the end
completeAudioArrayCopy = numpy.zeros(
len(completeAudioArray) + 44100, dtype="int16")
completeAudioArrayCopy[:len(completeAudioArray)] = completeAudioArray
completeAudioArray = completeAudioArrayCopy
return completeAudioArray
#def deleteTempDir(self):
# try:
# rmtree(self.tempDir)
# except FileNotFoundError:
# pass
def cancel(self):
self.canceled = True
def reset(self):
self.canceled = False
@staticmethod
def badName(name):
'''Returns whether a name contains non-alphanumeric chars'''
badName = False
for letter in name:
if letter in string.punctuation:
badName = True
return badName
@staticmethod
def stringOrderedDict(dictionary):
sorted_ = OrderedDict(sorted(dictionary.items(), key=lambda t: t[0]))
return repr(sorted_)
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