webradio/software/webradio.py

567 lines
15 KiB
Python
Executable File

#!/usr/bin/env python
from PIL import Image, ImageDraw, ImageFont
import asyncio
from mpd import MPDClient
import spidev
import math
import traceback
from aiohttp import web
import datetime
IO_DELAY = (1.0 / 18.0)
MPD_DELAY = 0.5
SPI_SPEED = 500000
IO_SPEED = 50000
LIVE_SELECT = 160
LIVE_VOLUME = 40
LIKE_FILE = "/var/db/wr_likes"
class display(object):
def __init__(self):
self.fg = 1
self.width = 128
self.height = 32
self.font_title = ImageFont.truetype('/usr/share/fonts/noto-cjk/NotoSansCJK-Light.ttc', 18)
self.font_info = ImageFont.truetype('/usr/share/fonts/TTF/DejaVuSans.ttf', 10)
self.img = Image.new('1', (self.width, self.height), color = not self.fg)
self.d = ImageDraw.Draw(self.img)
def render(self):
print("render NYI")
def animate(self, ticks):
print("animate NYI")
def get_image(self):
temp = self.img
return temp.rotate(-90,expand=True).tobytes()
class display_playback(display):
def __init__(self):
super().__init__()
self.title = ""
self.title_scroll = 0
self.title_scroll_max = -1
self.info = ""
self.syms = [];
self.title_img = Image.new('1', (0, 0), color = not self.fg)
self.bar_redraw = True
def update_text(self, title, center=False):
self.title = title
font_shift = 5
w,h = self.d.textsize(self.title, font=self.font_title)
h = 20 # Force standard height to avoid artifacting
if (w > self.width): # Check the text is short enough to be static
self.title += "."
w,h = self.d.textsize(self.title, font=self.font_title)
h = 26 # Force standard height to avoid artifacting
w += 10 # Spacing between repetitions
self.title_scroll_max = w
self.title_scroll = self.title_scroll_max - 10
# Prerender
fw = w + self.width
self.title_img = Image.new('1', (fw, h), color = not self.fg)
ImageDraw.Draw(self.title_img).text((0,-font_shift), self.title, font=self.font_title, fill=self.fg)
self.title_img.paste(self.title_img, (w,0))
self.title_img = self.title_img.crop((0,0,fw,h-font_shift))
else:
if (center):
x_shift = (self.width - w) / 2
else:
x_shift = 0;
w = self.width
self.title_img = Image.new('1', (w, h), color = not self.fg)
ImageDraw.Draw(self.title_img).text((x_shift,-font_shift), self.title, font=self.font_title, fill=self.fg)
self.title_scroll = 0
self.title_scroll_max = -1
def update_info(self, info):
self.info = info
self.bar_redraw = True
def update_syms(self, syms):
self.syms = syms
self.bar_redraw = True
def scroll_title(self, amount = 1):
if (self.title_scroll >= 0):
self.title_scroll = (self.title_scroll + amount) % self.title_scroll_max
def animate(self, ticks):
self.scroll_title(ticks)
def _render_bar(self):
# Clear framebuffer
self.d.rectangle((0,self.height - 1 - 10,self.width,self.height), fill = self.fg)
# Playback info
w,h = self.d.textsize(self.info, font=self.font_info)
self.d.text((self.width-w-2, self.height - 1 - 10 - 1), self.info, font=self.font_info, fill=not self.fg)
# Status icons
status = "".join([" " + icon + " " for icon in self.syms])
self.d.text((-2, self.height - 1 - 10 - 1), status, font=self.font_info, fill=not self.fg)
def render(self):
# Title (prerendered bitmap to shift)
self.img.paste(self.title_img, (-self.title_scroll,0))
# Other things were pre-rendered to the framebuffer directly
if (self.bar_redraw):
self.bar_redraw = False
self._render_bar()
# TODO: Maybe a progress bar?
#self.d.line((0,15, 127,15), fill=self.fg)
class display_selection(display):
def __init__(self):
super().__init__()
self.entries = []
self.page = 0
def animate(self, ticks):
pass
def render(self):
#self.img.paste(self.img_pre, (0,0))
self.img = self.img_pre
def set_entries(self, entries, left_only = False):
self.left_only = left_only
self.entries = entries
self.set_page(0)
def set_page(self, page):
self.page = page
font_shift = 0
x = 0
y = 0
self.img_pre = Image.new('1', (self.width, self.height), color = not self.fg)
mult = 3 if self.left_only else 6
for entry in self.entries[page*mult:]:
ImageDraw.Draw(self.img_pre).text((x,y-font_shift), entry, font=self.font_info, fill=self.fg)
y += self.height / 3
if (y >= self.height):
y = 0
x += self.width / 2
if (x >= self.width) or (self.left_only):
break
def set_page_relative(self, delta):
self.page += delta
max_page = math.ceil(len(self.entries) / 6) - 1
if (self.page < 0):
self.page = 0
elif (self.page > max_page):
self.page = max_page
self.set_page(self.page)
def get_entry(self, offset, page = -1):
if (page == -1):
page = self.page
try:
mult = 3 if self.left_only else 6
return self.entries[page * mult + offset]
except:
return ""
class display_manager(object):
def __init__(self):
self.tick = 0
self.current_display = None
def set_display(self, disp, live = -1):
self.current_display = disp
self.current_display.live = live
def set_live(self, live = -1):
self.current_display.live = live
def kill_display(self):
self.current_display.live = 0
def display_is_dead(self):
if (self.current_display):
return (self.current_display.live == 0)
return 0
def render(self):
if (self.current_display):
self.current_display.render()
def get_image(self):
if (self.current_display):
return self.current_display.get_image()
else:
return []
def animate(self, ticks):
old_tick = self.tick
self.tick += ticks
if (self.current_display):
if (not hasattr(self.current_display, 'ltick')):
self.current_display.ltick = old_tick
self.current_display.animate(self.tick - self.current_display.ltick)
self.current_display.ltick = self.tick
if (self.current_display.live > 0):
self.current_display.live -= ticks
# TODO: Consider also animating inactive screens... Might resolve some glitches when updating text while a screen is in the background (or pass `tick` to update funcs)
class radioserv:
def load_liked(self):
try:
f = open(LIKE_FILE, "r")
text = f.read()
if text != "":
self.liked = text.split("\n");
else:
self.liked = []
f.close();
except:
self.liked = []
def like_song(self):
self.liked.append("[{}] {}".format(datetime.datetime.now(), self.get_formatted_title()))
self.disp_info.update_text("", True)
self.disp_info.update_info("Liked song.")
self.disp_mgr.set_display(self.disp_info, LIVE_VOLUME)
self.sync_liked()
def unlike_song(self, id):
self.liked.pop(id)
self.sync_liked()
def sync_liked(self):
f = open(LIKE_FILE, "w")
f.write("\n".join(self.liked))
f.close()
def handle_volume(self, rotary_delta, bat):
if (rotary_delta != 0):
nvol = int(self.status['volume']) + (rotary_delta * 4)
if (nvol < 0):
nvol = 0;
elif (nvol > 100):
nvol = 100
self.disp_info.update_text("{}%".format(nvol), True)
self.disp_info.update_info("Battery: {}%".format(bat))
self.disp_mgr.set_display(self.disp_info, LIVE_VOLUME)
self.mpd.setvol(nvol)
def open_playlist_screen(self):
playlists = self.mpd.listplaylists()
entries = []
for entry in playlists:
entries.append(entry['playlist'])
self.disp_select.mode = "playlist"
self.disp_select.set_entries(entries)
self.disp_mgr.set_display(self.disp_select, LIVE_SELECT)
def open_directory_screen(self):
dirs = self.mpd.listfiles("")
entries = []
for entry in dirs:
try:
entries.append(entry['directory'])
except:
pass
self.disp_select.mode = "directory"
self.disp_select.set_entries(entries, True)
self.disp_mgr.set_display(self.disp_select, LIVE_SELECT)
def get_formatted_title(self):
try:
title = self.currentsong['title']
try:
title += " by " + self.currentsong['artist']
except:
pass
except:
try:
title = self.currentsong['file']
except:
title = " "
return title
def handle_rx(self, rdata):
# Handle battery voltage
bat = int((int(rdata[2]) - 175) / 45 * 100)
if (bat < 0):
bat = 0
elif (bat > 100):
bat = 100
if (bat == 0):
print("Battery depleted. Shutting down.")
self.kill_event.set()
# Handle key presses
key_id = rdata[0] & 0x0F
key_press_short = ((rdata[0] & 0xC0) == 128)
key_press_long = ((rdata[0] & 0xC0) == 192)
if key_press_short:
print("Press key: {}".format(key_id))
elif key_press_long:
print("Long press key: {}".format(key_id))
# Handle rotary input
rotary_delta = int(rdata[1] & 0x1F) - 16
if (self.disp_mgr.current_display == self.disp_playback):
if (key_press_short):
if (key_id == 0): # Tune-
self.like_song()
elif (key_id == 1): # Tune+
self.mpd.previous()
elif (key_id == 2): # Power
self.kill_event.set()
elif (key_id == 4): # Wheel
if (self.status['state'] == "stop"):
self.mpd.play(0)
else:
self.mpd.pause()
elif (key_id == 5): # Source
self.open_playlist_screen()
elif (key_id == 6): # Info / Menu
self.mpd.next()
elif (key_id == 7): # PRESET
self.mpd.random(int(not int(self.status['random'])))
if (key_press_long):
if (key_id == 5): # Source
self.open_directory_screen()
self.handle_volume(rotary_delta, bat)
elif (self.disp_mgr.current_display == self.disp_info):
self.handle_volume(rotary_delta, bat)
if (key_press_short):
self.disp_mgr.kill_display()
elif (self.disp_mgr.current_display == self.disp_select):
if (key_press_short) or (key_press_long):
sel = -1
if (key_id == 0): # Tune-
sel = 2
elif (key_id == 1): # Tune+
sel = 1
elif (key_id == 2): # Power
sel = 0
elif (key_id == 4): # Wheel
sel = 100
elif (key_id == 5): # Source
sel = 3
elif (key_id == 6): # Info / Menu
sel = 4
elif (key_id == 7): # PRESET
sel = 5
if (sel == -1):
pass
elif (sel == 100):
self.disp_mgr.kill_display()
else:
print("Load {} {}.".format(self.disp_select.mode, self.disp_select.get_entry(sel)))
if key_press_short:
self.mpd.clear()
if (self.disp_select.mode == "playlist"):
self.mpd.load(self.disp_select.get_entry(sel))
else:
self.mpd.add(self.disp_select.get_entry(sel))
if key_press_short:
self.mpd.play(0)
self.disp_mgr.kill_display()
if (rotary_delta != 0):
self.disp_mgr.set_live(LIVE_SELECT)
self.disp_select.set_page_relative(rotary_delta)
async def io_main(self):
while True:
try:
if self.disp_mgr.display_is_dead():
self.disp_mgr.set_display(self.disp_playback)
self.disp_mgr.animate(1)
self.disp_mgr.render()
rdata = self.spi.xfer([100, 101, 102], IO_SPEED, 1000)
self.handle_rx(rdata)
data = list(self.disp_mgr.get_image())
rdata = self.spi.xfer(data, SPI_SPEED, 10000)
await self.io_event.wait()
self.io_event.clear()
except:
print("Error in io_main")
traceback.print_exc()
async def io_timer_main(self):
while True:
await asyncio.sleep(IO_DELAY)
self.io_event.set()
async def mpd_main(self):
last_title = "Loading..."
last_state = ""
last_info = ""
last_random = -1
play_icon_map = {"play" : "▶️", "pause" : "ll", "stop" : ""}
while True:
# Query MPD
status = self.mpd.status()
currentsong = self.mpd.currentsong()
self.status = status
self.currentsong = currentsong
# Song title
title = self.get_formatted_title()
if (title != last_title):
self.disp_playback.update_text(title)
last_title = title
# Playback state (icons)
if (status['state'] != last_state or status['random'] != last_random):
icons = []
icons.append(play_icon_map.get(status["state"], "?"))
if (status['random'] == '1'):
icons.append("Z")
self.disp_playback.update_syms(icons)
last_state = status["state"]
last_random = status["random"]
# Playback info
try:
cm, cs = divmod(round(float(status['elapsed'])), 60)
if "duration" in status:
dm, ds = divmod(round(float(status['duration'])), 60)
info = "#%d/%d %d:%02d/%d:%02d" % (int(status['song']) + 1, int(status['playlistlength']), cm, cs, dm, ds)
else:
info = "Radio %02d:%02d" % (cm, cs)
except:
info = "Stopped"
if (info != last_info):
self.disp_playback.update_info(info)
# Sadly I can't use mpd.idle() here
await asyncio.sleep(MPD_DELAY)
async def webserver_main(self):
print("ws main")
routes = web.RouteTableDef()
@routes.get('/')
@routes.post('/')
async def hello(request):
data = await request.post()
if (len(data) > 0):
for key in data:
print(key[4:])
self.unlike_song(int(key[4:]))
slist = ""
i = 0
for entry in self.liked:
slist += '<li>{} <input name="del_{}" type="submit" value="X"></input></li>'.format(entry, i)
i += 1
if slist == "":
slist = "There are no liked songs. Push the like-button to add them to the list."
text = """
<html>
<head>
<title>Web Radio: Liked Songs</title>
</head>
<body>
<h1>Web Radio: Liked Songs</h1>
<p>
<form action="/" method="post">
{}
</form>
</p>
<p>
<a href="/">Refresh</a>
</p>
</body>
</html>
""".format(slist);
return web.Response(text=text, headers=({'CONTENT-TYPE': "text/html"}))
app = web.Application()
app.add_routes(routes)
await web._run_app(app, host="*", port=80)
async def main(self):
# Connect to SPI
self.spi = spidev.SpiDev()
self.spi.open(0, 0)
self.spi.max_speed_hz = SPI_SPEED
self.spi.mode = 0b00
# Connect to MPD
self.mpd = MPDClient()
retry = 15
while retry > 0:
retry -= 1
try:
self.mpd.connect("localhost", 6600)
break
except:
print("Error connecting to MPD. Retrying in 1s.")
await asyncio.sleep(1)
try:
self.mpd.status()
except:
print("Could not connect to server. Exiting.")
return -1
# Set up displays
self.disp_playback = display_playback()
self.disp_playback.update_text("Loading...")
self.disp_info = display_playback()
self.disp_info.update_text("---");
self.disp_select = display_selection()
self.disp_mgr = display_manager()
self.disp_mgr.set_display(self.disp_playback)
# Flush I/O messages
rdata = self.spi.xfer([0, 0, 0], IO_SPEED, 1000)
# Create main tasks
self.io_event = asyncio.Event()
self.kill_event = asyncio.Event()
io_task = asyncio.create_task(self.io_main())
io_timer_task = asyncio.create_task(self.io_timer_main())
mpd_task = asyncio.create_task(self.mpd_main())
ws_task = asyncio.create_task(self.webserver_main())
await self.kill_event.wait()
self.kill_event.clear()
# Show shutdown screen
self.disp_info.update_text("Shutting down", True);
self.disp_info.update_info(" ")
self.disp_mgr.set_display(self.disp_info)
await asyncio.sleep(0.1)
io_timer_task.cancel()
io_task.cancel()
mpd_task.cancel()
self.mpd.close()
self.mpd.disconnect()
def __init__(self):
self.loop = asyncio.new_event_loop()
asyncio.set_event_loop(self.loop)
self.load_liked()
try:
self.loop.run_until_complete(self.main())
finally:
self.loop.run_until_complete(self.loop.shutdown_asyncgens())
self.loop.close()
r = radioserv()