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Fix up the spectrum graph

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This commit is contained in:
Correl Roush 2020-09-26 00:59:57 -04:00
parent 7fe5057f33
commit 6194cfcd49
1 changed files with 44 additions and 9 deletions
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53
turntable/gui.py
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@ -32,20 +32,54 @@ class Plot:
self.width = width
self.height = height
self.bars = bars
self.audio = b""
self.audio = models.PCM(44100, 2)
def draw(self) -> None:
data = np.fromstring(self.audio, dtype=np.int16)
def spectrum(self) -> np.array:
data = np.fromstring(self.audio.raw, dtype=np.int16)
if len(data) == 0:
return data
merged = np.mean(np.reshape(data, (-1, self.audio.channels)), axis=1)
fft = np.abs(np.fft.fft(merged))
fft = fft[: len(fft) // 2]
dbfs = 20 * np.log10(fft * 2 / (len(fft) * 2 ** 15))
dbfs = np.maximum(-100, dbfs) + 100
return dbfs
def draw_lines(self) -> None:
data = self.spectrum()
if len(data) == 0:
return
fft = abs(np.fft.fft(data).real)
fft = fft[: len(fft) // 2]
fft = abs(scipy.signal.resample(fft, self.bars))
print((np.min(data), np.max(data)))
nlines = self.width // 4
data = np.mean(
np.reshape(data[: len(data) // nlines * nlines], (-1, len(data) // nlines)),
axis=1,
)
lines = self.height * (data / 100)
for i, line in enumerate(lines):
pygame.draw.line(
self.screen,
(128, 128, 128),
(self.x + i * 4, self.height),
(self.x + i * 4, self.height - int(line)),
)
def draw_bars(self) -> None:
data = self.spectrum()
if len(data) == 0:
return
fft = np.mean(
np.reshape(
data[: len(data) // self.bars * self.bars], (-1, len(data) // self.bars)
),
axis=1,
)
light_width = self.width // (2 * self.bars - 1)
light_height = self.height // 2 // light_width
light_steps = self.height // light_height // 2
lights = fft * light_steps / 2 ** 16
lights = fft * light_steps / 100
colors = [
(0, (0, 255, 0)),
@ -147,11 +181,12 @@ def main():
...
try:
while sample := pcm_in.get(False):
plot.audio = sample.raw
plot.audio = sample
except queue.Empty:
...
screen.fill((0, 0, 0))
plot.draw()
plot.draw_lines()
plot.draw_bars()
title_text = font.render(title, True, (255, 255, 255))
title_rect = title_text.get_rect()
title_rect.left = 25