128 lines
6.3 KiB
Python
128 lines
6.3 KiB
Python
import time
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from PIL import Image, ImageFont, ImageDraw
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from ST7789 import ST7789
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from glob import glob
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import struct
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import smbus
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import sys
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import musicpd
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from math import floor
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class SoundslabDisplay:
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def __init__(self, player_client):
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self.screen_size = 240, 240
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self.spi_speed_mhz = 80
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self.st7789 = ST7789(
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rotation=90,
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port=0,
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cs=1,
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dc=9,
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backlight=13,
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spi_speed_hz=self.spi_speed_mhz * 1000 * 1000
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)
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self.current_background = Image.new("RGBA", self.screen_size, (0, 0, 255, 255))
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self.current_overlay = Image.new("RGBA", self.screen_size, (0, 0, 0, 0))
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self.current_menu = Image.new("RGBA", self.screen_size, (0, 0, 0, 0))
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self.fg_color = (255, 255, 255, 211)
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self.bg_color = (0, 0, 0, 127)
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# the connection to mpd passed in
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self.player_client = player_client
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# track battery voltage over time so we can figure out if we're charging the battery or not
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self.previous_voltage = 0.0
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# track currently playing song's art path to eliminate unnecessary reloads of the same image file
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self.current_art_path = None
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def getBatteryState(self):
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bus = smbus.SMBus(1)
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address = 0x36
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read = bus.read_word_data(address, 2)
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swapped = struct.unpack("<H", struct.pack(">H", read))[0]
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voltage = swapped * 78.125 / 1000000
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read = bus.read_word_data(address, 4)
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swapped = struct.unpack("<H", struct.pack(">H", read))[0]
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capacity = swapped / 256
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self.previous_voltage = voltage
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return (voltage, capacity)
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def updateOverlay(self):
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# initialize overlay
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im_overlay = Image.new("RGBA", self.screen_size, (0, 0, 0, 0))
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font = ImageFont.truetype(font='/usr/share/fonts/truetype/hack/Hack-Bold.ttf', size=18)
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small_font = ImageFont.truetype(font='/usr/share/fonts/truetype/hack/Hack-Regular.ttf', size=14)
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overlay = ImageDraw.Draw(im_overlay)
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# draw four rects on edges of screen_size
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overlay.rectangle([(0, 0), (self.screen_size[0], 20)], self.bg_color) # top bar
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overlay.rectangle([(0, self.screen_size[1] - 20), (self.screen_size[0], self.screen_size[1])], self.bg_color) # bottom bar
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overlay.rectangle([(0, 20), (20, self.screen_size[1] - 20)], self.bg_color) # left bar
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overlay.rectangle([(self.screen_size[0] - 20, 20), (self.screen_size[0], self.screen_size[1] - 20)], self.bg_color) # right bar
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# get status from mpd
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current_status = self.player_client.status()
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current_track_number = int(current_status['song']) + 1
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total_track_number = current_status['playlistlength']
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track_progress_percent = float(current_status['elapsed']) / float(current_status['duration'])
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print("track progress:" + str(track_progress_percent))
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# add track # / total #
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track_and_queue = str(current_track_number) + " of " + str(total_track_number)
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overlay.text((10, 0), track_and_queue, font=font, fill=self.fg_color)
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# add battery level
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previous_voltage = self.previous_voltage
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(voltage, capacity) = self.getBatteryState()
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battery_display = '{:02.2f}'.format(capacity) + '%'
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battery_display_offset = 80
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print("Battery: voltage: " + str(voltage) + " prev voltage: " + str(previous_voltage) + " capacity: " + str(capacity))
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# below method doesn't work - very inaccurate!
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# should probably track over a longer period of time, which will mean
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# it's harder to come up with a valid "charging or not" decision
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# if voltage > previous_voltage:
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# # we're probably charging!
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# battery_display = 'Chrg ' + battery_display
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# battery_display_offset = 130
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overlay.text((self.screen_size[0] - battery_display_offset, 0), battery_display, font=font, fill=self.fg_color)
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# add progress meter
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overlay.rectangle([(70, self.screen_size[1] - 15), (self.screen_size[0] - 70, self.screen_size[1] - 5)], fill=(0, 0, 0, 0), outline=self.fg_color, width=1)
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overlay.rectangle([(70, self.screen_size[1] - 15), (int((self.screen_size[0] - 140) * track_progress_percent) + 70, self.screen_size[1] - 5)], fill=self.fg_color, outline=self.fg_color, width=1)
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# add playhead position and song duration displays at beginning and end of progress meter
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(time_width, time_height) = overlay.textsize(text='00:00', font=small_font)
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playhead = str(floor(float(current_status['elapsed']) / 60)) + ":" + "{:02d}".format(floor(float(current_status['elapsed']) % 60))
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duration = str(floor(float(current_status['duration']) / 60)) + ":" + "{:02d}".format(floor(float(current_status['duration']) % 60))
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overlay.text((5, self.screen_size[1] - 20 + floor(time_height / 2)), playhead, font=small_font, fill=self.fg_color)
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overlay.text((self.screen_size[0] - 5 - time_width, self.screen_size[1] - 20 + floor(time_height / 2)), duration, font=small_font, fill=self.fg_color)
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self.current_overlay = im_overlay.copy()
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def updateAlbumArt(self):
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current_status = self.player_client.status()
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song_data = self.player_client.playlistid(current_status['songid'])
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path_info = song_data[0]['file'].split('/')
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cover_image_file = '/media/usb0/' + path_info[0] + '/' + path_info[1] + '/cover.jpg'
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if cover_image_file != self.current_art_path:
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self.current_art_path = cover_image_file
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im = Image.open(cover_image_file).convert("RGBA")
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image = im.resize((200, 200))
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# get dominant color from album art
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#test_image = im.convert("RGB")
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#test_image.resize((1, 1), resample=0)
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#dominant_color = test_image.getpixel((0, 0))
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# get top left pixel color instead and use that!
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dominant_color = image.getpixel((0, 0))
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backing = Image.new("RGBA", self.screen_size, dominant_color)
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backing.paste(image, (20, 20))
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self.current_background = backing.copy()
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def updateDisplay(self):
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tempoutput = Image.alpha_composite(self.current_background, self.current_overlay)
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self.st7789.display(Image.alpha_composite(tempoutput, self.current_menu))
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