113 lines
3.4 KiB
Python
113 lines
3.4 KiB
Python
# SPDX-FileCopyrightText: 2020 Gamblor21
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
"""
|
|
`adafruit_led_animation.animation.volume`
|
|
================================================================================
|
|
Volume animation for CircuitPython helper library for LED animations.
|
|
* Author(s): Mark Komus
|
|
Implementation Notes
|
|
--------------------
|
|
**Hardware:**
|
|
* `Adafruit NeoPixels <https://www.adafruit.com/category/168>`_
|
|
* `Adafruit DotStars <https://www.adafruit.com/category/885>`_
|
|
**Software and Dependencies:**
|
|
* Adafruit CircuitPython firmware for the supported boards:
|
|
https://circuitpython.org/downloads
|
|
"""
|
|
|
|
from adafruit_led_animation.animation import Animation
|
|
|
|
|
|
def map_range(x, in_min, in_max, out_min, out_max):
|
|
"""
|
|
Maps a number from one range to another.
|
|
:return: Returns value mapped to new range
|
|
:rtype: float
|
|
"""
|
|
mapped = (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min
|
|
if out_min <= out_max:
|
|
return max(min(mapped, out_max), out_min)
|
|
|
|
return min(max(mapped, out_max), out_min)
|
|
|
|
|
|
class Volume(Animation):
|
|
"""
|
|
Animate the brightness and number of pixels based on volume.
|
|
:param pixel_object: The initialised LED object.
|
|
:param float speed: Animation update speed in seconds, e.g. ``0.1``.
|
|
:param brightest_color: Color at max volume ``(r, g, b)`` tuple, or ``0x000000`` hex format
|
|
:param decoder: a MP3Decoder object that the volume will be taken from
|
|
:param float max_volume: what volume is considered maximum where everything is lit up
|
|
"""
|
|
|
|
# pylint: disable=too-many-arguments
|
|
def __init__(
|
|
self,
|
|
pixel_object,
|
|
speed,
|
|
brightest_color,
|
|
decoder,
|
|
max_volume=500,
|
|
name=None,
|
|
):
|
|
self._decoder = decoder
|
|
self._num_pixels = len(pixel_object)
|
|
self._max_volume = max_volume
|
|
self._brightest_color = brightest_color
|
|
super().__init__(pixel_object, speed, brightest_color, name=name)
|
|
|
|
def set_brightest_color(self, brightest_color):
|
|
"""
|
|
Animate the brightness and number of pixels based on volume.
|
|
:param brightest_color: Color at max volume ``(r, g, b)`` tuple, or ``0x000000`` hex format
|
|
"""
|
|
self._brightest_color = brightest_color
|
|
|
|
def draw(self):
|
|
red = int(
|
|
map_range(
|
|
self._decoder.rms_level,
|
|
0,
|
|
self._max_volume,
|
|
0,
|
|
self._brightest_color[0],
|
|
)
|
|
)
|
|
green = int(
|
|
map_range(
|
|
self._decoder.rms_level,
|
|
0,
|
|
self._max_volume,
|
|
0,
|
|
self._brightest_color[1],
|
|
)
|
|
)
|
|
blue = int(
|
|
map_range(
|
|
self._decoder.rms_level,
|
|
0,
|
|
self._max_volume,
|
|
0,
|
|
self._brightest_color[2],
|
|
)
|
|
)
|
|
|
|
lit_pixels = int(
|
|
map_range(
|
|
self._decoder.rms_level,
|
|
0,
|
|
self._max_volume,
|
|
0,
|
|
self._num_pixels,
|
|
)
|
|
)
|
|
# pylint: disable=consider-using-min-builtin
|
|
if lit_pixels > self._num_pixels:
|
|
lit_pixels = self._num_pixels
|
|
|
|
self.pixel_object[0:lit_pixels] = [(red, green, blue)] * lit_pixels
|
|
self.pixel_object[lit_pixels : self._num_pixels] = [(0, 0, 0)] * (
|
|
self._num_pixels - lit_pixels
|
|
)
|