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