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pyfxr_gui.py
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pyfxr_gui.py
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from math import sin, pi, copysign, cos
import random
import sys
from functools import lru_cache
import inspect
try:
import pygame
except ModuleNotFoundError:
sys.exit(
"Pygame was not found. To use the GUI, make sure you install "
"pyfxr with\n\npip install pyfxr[gui]"
)
import pygame.draw
import pygame.mixer
from pygame import Rect
import time
import pyfxr
BACKGROUND = pygame.Color((200, 128, 50))
WHITE_KEY = pygame.Color((200, 200, 180))
BLACK_KEY = pygame.Color((50, 50, 50))
screen: pygame.Surface = None
def lighter(color):
return pygame.Color(
128 + color.r >> 1,
128 + color.g >> 1,
128 + color.b >> 1,
)
def darker(color):
return pygame.Color(
color.r >> 1,
color.g >> 1,
color.b >> 1,
)
def rounded_rect(color, rect, radius=5):
if isinstance(color, str):
color = pygame.Color(color)
highlight = darker(color)
pygame.draw.rect(screen, color, rect, width=0, border_radius=radius)
pygame.draw.rect(screen, highlight, rect, width=1, border_radius=radius)
def text(text, pos, color='black', align='left'):
surf = text_surf(text, color)
x, y = pos
w, h = surf.get_size()
if align == 'left':
pass
elif align == 'center':
x -= w // 2
elif align == 'right':
x -= w
else:
raise ValueError(
"align must be left, right, or center"
)
screen.blit(surf, (x, y))
return pygame.Rect(x, y, *surf.get_size())
@lru_cache()
def text_surf(text, color='black'):
"""Get a rendered text surface, with caching."""
if isinstance(color, str):
color = pygame.Color(color)
return font.render(text, True, color)
def draw():
screen.fill(BACKGROUND)
for w in WIDGETS:
w.draw()
class Button:
def __init__(self, rect, color=WHITE_KEY, radius=5):
self.rect = rect
self.color = color
self.radius = radius
self.selected = False
def draw(self):
color = lighter(self.color) if self.selected else self.color
rounded_rect(color, self.rect)
def on_click(self, pos):
"""Implement this to define click interactions."""
self.selected = True
def on_drag(self, pos):
"""Implement this to define click interactions."""
def on_release(self, pos):
"""Implement this to define click interactions."""
self.selected = False
class Key(Button):
def __init__(self, note, *args, **kwargs):
self.note = note
super().__init__(*args, **kwargs)
def on_click(self, pos):
super().on_click(pos)
print(
"tone = pyfxr.tone(",
f" {self.note!r}",
" attack=0.05,",
" sustain=0.0,",
" release=0.1,",
" wavetable=wavetable,",
")",
sep="\n"
)
s = pygame.mixer.Sound(
buffer=pyfxr.tone(
self.note,
attack=0.05,
sustain=0.0,
release=0.1,
wavetable=Waveform.current
)
)
s.set_volume(0.5)
s.play()
class Label(Button):
def __init__(self, text, pos, color='black', align='left'):
super().__init__(Rect(-1, -1, 0, 0), color)
self.align = align
self.surf = None
self._text = text
self.pos = pos
@property
def text(self):
return self._text
@text.setter
def text(self, value):
self._text = value
self.surf = None
self.rect = Rect(-1, -1, 0, 0)
def draw(self):
self.rect = text(self._text, self.pos, self.color, self.align)
def on_click(self, pos):
"""Labels are not click-sensitive so this does nothing."""
class Waveform:
current = None
def __init__(self, waveform, rect):
self.waveform_str = inspect.cleandoc(waveform)
self.waveform = eval(waveform)
self.rect = rect
wf = memoryview(self.waveform)
points = []
for i in range(0, 1024, 8):
x = self.rect.left + i / 1024 * self.rect.width
y = self.rect.centery + wf[i] / (1 << 15) * (self.rect.height / 2.6)
points.append((x, y))
self.points = points
if Waveform.current is None:
Waveform.current = self.waveform
def draw(self):
if self.current is self.waveform:
rounded_rect(pygame.Color('white'), self.rect)
else:
rounded_rect(WHITE_KEY, self.rect)
pygame.draw.aalines(
screen,
'red',
False,
self.points
)
def on_click(self, pos):
print(f"wavetable = {self.waveform_str}")
Waveform.current = self.waveform
def on_drag(self, pos):
pass
def on_release(self, pos):
pass
WIDGETS = []
class Keyboard:
def __init__(self, rect=Rect(0, 400, 800, 200)):
self.widgets = []
self.rect = rect
self.build(rect)
self.clicked = True
def draw(self):
for w in self.widgets:
w.draw()
def build(self, keyboard: Rect):
notes = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B']
notes = [f'{note}{octave}' for octave in (3, 4, 5) for note in notes][:25]
keyboard = Rect(0, 400, 800, 200)
x = keyboard.left
white_notes = []
black_notes = []
n_white_keys = sum('#' not in note for note in notes)
key_width = keyboard.width / n_white_keys
black_width = 2 * (key_width * 2 // 6)
for note in notes:
if '#' in note:
black_notes.append(Key(
note,
Rect(x - black_width // 2, keyboard.top - 3, black_width, keyboard.height * 2 // 3),
BLACK_KEY,
radius=3
))
else:
white_notes.append(Key(
note,
Rect(int(x), keyboard.top, int(x + key_width) - int(x) + 1, keyboard.height),
WHITE_KEY,
))
x += key_width
self.widgets.extend(white_notes)
self.widgets.extend(black_notes)
def key_at(self, pos):
return widget_at(pos, self.widgets)
def on_click(self, pos):
widget = self.key_at(pos)
if widget:
widget.on_click(pos)
self.clicked = widget
def on_drag(self, pos):
widget = self.key_at(pos)
if widget != self.clicked:
if self.clicked:
self.clicked.on_release(pos)
if widget:
widget.on_click(pos)
self.clicked = widget
def on_release(self, pos):
if self.clicked:
self.clicked.on_release(pos)
self.clicked = None
def make_waves():
waves = [
"pyfxr.Wavetable.sine()",
"pyfxr.Wavetable.square()",
"pyfxr.Wavetable.saw()",
"pyfxr.Wavetable.triangle()",
"""pyfxr.Wavetable.from_function(
lambda t: sin(t) * 0.7 + 0.3 * sin(6 * t + 0.5)
)""",
"""pyfxr.Wavetable.from_function(
lambda t: sin(t) * 0.5 + 0.5 * sin(2 * t)
)""",
"""pyfxr.Wavetable.from_function(
lambda t: sin(t) * 0.4 + 0.3 * sin(2 * t) + 0.3 * sin(10 * t - 1) * sin(t / 2)
)""",
"""pyfxr.Wavetable.from_function(
lambda t: 1 - 2 * abs(sin(t / 2 + pi / 2))
)""",
"""pyfxr.Wavetable.from_function(
lambda t: sin(10 * t) * sin(t / 2)
)""",
"pyfxr.Wavetable.square(0.8)",
"""pyfxr.Wavetable.from_function(
lambda t: (sin(t) + sin(3 * t) + sin(5 * t)) / 3
)""",
"""pyfxr.Wavetable.from_function(
lambda t: sin(t) * 0.9 + 0.1 * copysign(sin(t), sin(3 * t))
)""",
]
padding = 10
grid = Rect(30, 60, 800 - 60, 300)
for i, w in enumerate(waves):
ycell, xcell = divmod(i, 4)
width = (grid.width - 3 * padding) / 4
height = (grid.height - 3 * padding) / 3
x = grid.left + xcell * (width + padding)
y = grid.top + ycell * (height + padding)
WIDGETS.append(Waveform(w, Rect(x, y, width, height)))
WIDGETS.append(Label("Example Waveforms", (30, 40)))
def tones_tab():
WIDGETS.clear()
tabs()
WIDGETS.append(Keyboard())
make_waves()
sfx = pyfxr.SFX()
class Slider:
def __init__(self, param, rect):
self.rect = rect
self.param_name = param
self.label = param
self.param = pyfxr.SFX.__dict__[param]
self.value = self.param.default
self.bipolar = self.param.bipolar
def draw(self):
if self.bipolar:
x = self.rect.centerx
else:
x = self.rect.left
rounded_rect(
WHITE_KEY,
Rect(
self.rect.left,
self.rect.top + 25,
self.rect.width,
5
)
)
rounded_rect(
'red',
Rect(
x,
self.rect.top + 20,
2,
15
)
)
text(
f"{self.label}: {round(self.value, 2)}",
(self.rect.left, self.rect.top)
)
rounded_rect(
WHITE_KEY,
self.slider_rect(),
)
WIDTH = 10
def slider_rect(self):
track_width = self.rect.width - self.WIDTH
if self.bipolar:
x = self.rect.centerx + self.value * track_width * 0.5 - self.WIDTH / 2
else:
x = self.rect.left + self.value * track_width
return Rect(
x,
self.rect.top + 15,
self.WIDTH,
24
)
def on_click(self, pos):
slider = self.slider_rect()
if slider.collidepoint(pos):
x, y = pos
self.drag_offset = x - slider.left
else:
self.drag_offset = None
def on_drag(self, pos):
if self.drag_offset is None:
return
x, y = pos
slider_newx = clamp(
x - self.drag_offset,
self.rect.left,
self.rect.right - self.WIDTH
)
xpos = slider_newx - self.rect.left
track_width = self.rect.width - self.WIDTH
if self.bipolar:
self.value = 2 * (xpos / track_width) - 1.0
else:
self.value = xpos / track_width
def on_release(self, pos):
self.on_drag(pos)
setattr(sfx, self.param_name, round(self.value, 2))
playfx()
def playfx():
print(f"sfx = {sfx!r}")
s = pygame.mixer.Sound(
buffer=sfx.build()
)
s.set_volume(0.5)
s.play()
def clamp(v, min, max):
if v < min:
return min
elif v > max:
return max
return v
class TextButton(Button):
def draw(self):
super().draw()
x, y = self.rect.center
text(self.label, (x, y - 8), align="center")
class Randomiser(TextButton):
def __init__(self, func, rect):
super().__init__(rect)
self.func = self.label = func
if func == 'reset':
self.func = 'SFX'
def on_click(self, pos):
global sfx
if self.label != 'reset':
print(f"random_{self.func} = {self.func}()")
sfx = getattr(pyfxr, self.func)()
update_sfx_ui()
playfx()
def update_sfx_ui():
"""Update the sfx UI from the current sfx parameters."""
for w in WIDGETS:
if isinstance(w, Slider):
w.value = getattr(sfx, w.param_name)
Radio.set(sfx.wave_type.value)
class Radio:
"""A radio button.
Currently all radio buttons on the screen are mutually exclusive.
"""
def __init__(self, label, pos, value):
self.label = label
self.pos = pos
x, y = pos
self.rect = Rect(
x - 8, y - 10,
200, 20
)
self.selected = False
self.value = value
def draw(self):
x, y = self.pos
checkbox = Rect(x - 8, y - 8, 16, 16)
rounded_rect(WHITE_KEY, checkbox)
if self.selected:
pygame.draw.circle(screen, pygame.Color('#006600'), self.pos, 5)
textbox = text(self.label, (checkbox.right + 8, self.rect.top + 1))
self.rect = checkbox.union(textbox)
def on_click(self, pos):
self.selected = True
for w in WIDGETS:
if isinstance(w, Radio) and w is not self:
w.selected = False
self.on_change(self.value)
@staticmethod
def on_change(value):
raise NotImplementedError("Override Radio.on_change")
def on_drag(self, pos):
pass
def on_release(self, pos):
pass
@staticmethod
def set(value):
for w in WIDGETS:
if isinstance(w, Radio):
w.selected = w.value == value
def fxr_tab():
WIDGETS.clear()
tabs()
params = [
k
for k, v in vars(pyfxr.SFX).items()
if isinstance(v, pyfxr.FloatParam)
]
x = 20
y = 50
randomisers = [
"reset",
"explosion",
"hurt",
"jump",
"pickup",
"powerup",
"laser",
"select",
]
for func in randomisers:
button = Randomiser(
func,
Rect(x, y, 150, 30),
)
y += 40
WIDGETS.append(button)
WIDGETS.extend([
Radio('Square', (200, 60), 0),
Radio('Saw', (320, 60), 1),
Radio('Sine', (440, 60), 2),
Radio('Noise', (560, 60), 3),
])
def change_wave(value):
wave = pyfxr.WaveType(value)
sfx.wave_type = wave
playfx()
Radio.on_change = staticmethod(change_wave)
x = 190
y = 90
for param in params:
WIDGETS.append(Slider(param, Rect(x, y, 170, 40)))
y += 60
if y > 550:
y = 90
x += 190
update_sfx_ui()
class TabButton(TextButton):
current_tab = 'sfx'
def __init__(self, click, label, *args, **kwargs):
super().__init__(*args, **kwargs)
self.click = click
self.label = label
# invert selection just so that selected tab is brighter
self.selected = label != self.current_tab
def on_click(self, pos):
super().on_click(pos)
TabButton.current_tab = self.label
self.click()
def on_release(self, pos):
pass
def tabs():
WIDGETS.extend([
TabButton(fxr_tab, "sfx", Rect(20, -4, 100, 30)),
TabButton(tones_tab, "tones", Rect(122, -4, 100, 30)),
])
fxr_tab()
def widget_at(pos, widgets=None):
for b in reversed(widgets or WIDGETS):
if b.rect.collidepoint(pos):
return b
return None
def main():
global screen, font
pygame.mixer.pre_init(
44100,
channels=1
)
pygame.init()
pygame.display.set_caption("pyfxr")
screen = pygame.display.set_mode((800, 600))
font = pygame.font.SysFont('sans-serif', 24, bold=False)
while True:
draw()
pygame.display.flip()
ev = pygame.event.wait()
if ev.type == pygame.QUIT:
return
elif ev.type == pygame.MOUSEBUTTONDOWN:
if ev.button == pygame.BUTTON_LEFT:
clicked = widget_at(ev.pos)
if clicked:
clicked.on_click(ev.pos)
elif ev.type == pygame.MOUSEMOTION:
if pygame.BUTTON_LEFT in ev.buttons:
if clicked:
clicked.on_drag(ev.pos)
elif ev.type == pygame.MOUSEBUTTONUP:
if ev.button == pygame.BUTTON_LEFT:
if clicked:
clicked.on_release(ev.pos)
clicked = None
elif ev.type == pygame.KEYDOWN:
if ev.key == pygame.K_F1:
tones_tab()
elif ev.key == pygame.K_F2:
fxr_tab()
def play():
sine = pyfxr.Waveform.square()
start = time.perf_counter_ns()
tone = pyfxr.pluck(duration=1.0, pitch='A4')
end = time.perf_counter_ns()
print("Generated tone in", (end - start) // 1000, "us")
pygame.mixer.Sound(buffer=tone).play()
time.sleep(tone.duration)
tone.save('output.wav')
if __name__ == '__main__':
main()