114 lines
4.0 KiB
Python
114 lines
4.0 KiB
Python
''' Original Audio Visualization '''
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import numpy
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from PIL import Image, ImageDraw
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from PyQt4 import uic
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import os, random
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class Component:
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def widget(self,parent):
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self.parent = parent
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page = uic.loadUi(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'original.ui'))
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page.comboBox_visLayout.addItem("Classic")
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page.comboBox_visLayout.addItem("Split")
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page.comboBox_visLayout.addItem("Bottom")
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#visLayoutValue = int(self.settings.value('visLayout'))
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page.comboBox_visLayout.setCurrentIndex(0)
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page.comboBox_visLayout.currentIndexChanged.connect(self.update)
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return page
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def update(self):
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self.layout = self.page.comboBox_visLayout.currentIndex()
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print(self.layout)
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self.parent.drawPreview()
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def previewRender(self, previewWorker, widget):
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spectrum = numpy.fromfunction(lambda x: 0.008*(x-128)**2, (255,), dtype="int16")
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width = int(previewWorker.core.settings.value('outputWidth'))
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height = int(previewWorker.core.settings.value('outputHeight'))
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return drawBars(width, height, spectrum, (255, 255, 255), self.layout)
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def preFrameRender(self, **kwargs):
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for kwarg, value in kwargs.items():
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exec('self.%s = value' % kwarg)
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self.smoothConstantDown = 0.08
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self.smoothConstantUp = 0.8
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self.lastSpectrum = None
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def frameRender(self, moduleNo, frameNo):
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self.lastSpectrum = transformData(frameNo, self.completeAudioArray, self.sampleSize,
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self.smoothConstantDown, self.smoothConstantUp, self.lastSpectrum)
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width = int(self.worker.core.settings.value('outputWidth'))
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height = int(self.worker.core.settings.value('outputHeight'))
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return drawBars(width, height, self.lastSpectrum, (255,255,255), self.layout)
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def transformData(i, completeAudioArray, sampleSize, smoothConstantDown, smoothConstantUp, lastSpectrum):
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if len(completeAudioArray) < (i + sampleSize):
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sampleSize = len(completeAudioArray) - i
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numpy.seterr(divide='ignore')
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window = numpy.hanning(sampleSize)
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data = completeAudioArray[i:i+sampleSize][::1] * window
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paddedSampleSize = 2048
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paddedData = numpy.pad(data, (0, paddedSampleSize - sampleSize), 'constant')
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spectrum = numpy.fft.fft(paddedData)
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sample_rate = 44100
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frequencies = numpy.fft.fftfreq(len(spectrum), 1./sample_rate)
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y = abs(spectrum[0:int(paddedSampleSize/2) - 1])
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# filter the noise away
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# y[y<80] = 0
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y = 20 * numpy.log10(y)
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y[numpy.isinf(y)] = 0
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if lastSpectrum is not None:
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lastSpectrum[y < lastSpectrum] = y[y < lastSpectrum] * smoothConstantDown + lastSpectrum[y < lastSpectrum] * (1 - smoothConstantDown)
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lastSpectrum[y >= lastSpectrum] = y[y >= lastSpectrum] * smoothConstantUp + lastSpectrum[y >= lastSpectrum] * (1 - smoothConstantUp)
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else:
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lastSpectrum = y
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x = frequencies[0:int(paddedSampleSize/2) - 1]
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return lastSpectrum
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def drawBars(width, height, spectrum, color, layout):
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vH = height-height/8
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bF = width / 64
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bH = bF / 2
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bQ = bF / 4
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imTop = Image.new("RGBA", (width, height),(0,0,0,0))
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draw = ImageDraw.Draw(imTop)
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r, g, b = color
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color2 = (r, g, b, 125)
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bP = height / 1200
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for j in range(0, 63):
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draw.rectangle((bH + j * bF, vH+bQ, bH + j * bF + bF, vH + bQ - spectrum[j * 4] * bP - bH), fill=color2)
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draw.rectangle((bH + bQ + j * bF, vH , bH + bQ + j * bF + bH, vH - spectrum[j * 4] * bP), fill=color)
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imBottom = imTop.transpose(Image.FLIP_TOP_BOTTOM)
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im = Image.new("RGBA", (width, height),(0,0,0,0))
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if layout == 0:
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y = 0 - int(height/100*43)
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im.paste(imTop, (0, y), mask=imTop)
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y = 0 + int(height/100*43)
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im.paste(imBottom, (0, y), mask=imBottom)
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if layout == 1:
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y = 0 + int(height/100*10)
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im.paste(imTop, (0, y), mask=imTop)
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y = 0 - int(height/100*10)
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im.paste(imBottom, (0, y), mask=imBottom)
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if layout == 2:
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y = 0 + int(height/100*10)
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im.paste(imTop, (0, y), mask=imTop)
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return im
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