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104 lines
2.4 KiB
104 lines
2.4 KiB
# Major library imports |
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import atexit |
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import pyaudio |
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from numpy import zeros, short, fromstring, array |
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from numpy.fft import fft |
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import colorsys |
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import time |
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import blup.frame |
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import blup.output |
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#NUM_SAMPLES = 512 |
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NUM_SAMPLES = 36 |
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#NUM_SAMPLES = 18 |
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#NUM_SAMPLES = 16 |
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#SAMPLING_RATE = 11025 |
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#SAMPLING_RATE = 11024 / 2 |
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SAMPLING_RATE = 1100 |
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_stream = None |
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def read_fft(): |
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global _stream |
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pa = None |
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def cleanup_audio(): |
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if _stream: |
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_stream.stop_stream() |
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_stream.close() |
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pa.terminate() |
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if _stream is None: |
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pa = pyaudio.PyAudio() |
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_stream = pa.open(format=pyaudio.paInt16, channels=1, |
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rate=SAMPLING_RATE, |
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input=True, frames_per_buffer=NUM_SAMPLES) |
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atexit.register(cleanup_audio) |
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audio_data = fromstring(_stream.read(NUM_SAMPLES), dtype=short) |
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normalized_data = audio_data / 32768.0 |
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return fft(normalized_data)[1:1+NUM_SAMPLES/2] |
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def flatten_fft(scale = 1.0): |
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""" |
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Produces a nicer graph, I'm not sure if this is correct |
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""" |
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for i, v in enumerate(read_fft()): |
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yield scale * (i * v) / NUM_SAMPLES |
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def makeColor(x): |
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hue = (7-x) / 7.0 / 3.0 -0.1 |
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if hue < 0: |
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hue += 1 |
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rgb = map(lambda x: int(round(x*7)), colorsys.hsv_to_rgb(hue, 1, 1)) |
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return rgb |
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def makeSpectrumFrame(spectrum): |
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f = blup.frame.Frame(blup.frame.FrameDimension(18,8,8,3)) |
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for x, y in enumerate(spectrum): |
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if y > 7: |
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y = 7 |
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y = int(y) |
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for i in range(y): |
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#val = (7,7,7) |
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val = makeColor(i) |
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f.setPixel(x, 7-i, val) |
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return f |
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def draw(): |
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'''Draw 3 different colour graphs''' |
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global NUM_SAMPLES |
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audio = array(list(flatten_fft(scale = 80))) |
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freqs = len(audio) |
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bass, mid, treble = triple(audio) |
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colours = (0.5, 1.0, 0.5), (1, 1, 0), (1, 0.2, 0.5) |
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fill(0, 0, 1) |
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rect(0, 0, WIDTH, 400) |
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translate(50, 200) |
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for spectrum, col in zip((bass, mid, treble), colours): |
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fill(col) |
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for i, s in enumerate(spectrum): |
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rect(i, 0, 1, -abs(s)) |
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else: |
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translate(i, 0) |
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audio = array(list(flatten_fft(scale = 80))) |
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out = blup.output.getOutput('colorfulshell') |
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while True: |
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audio = array(list(flatten_fft(scale=80))) |
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#audio = map(abs, audio) |
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#print len(audio) |
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frame = makeSpectrumFrame([ int((x/18.0)*8) for x in range(18)]) |
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frame = makeSpectrumFrame(audio) |
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#print map(int,audio) |
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out.sendFrame(frame) |
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#time.sleep(0.1) |
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