271 lines
7.2 KiB
Python
271 lines
7.2 KiB
Python
#!/usr/bin/env python
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from PIL import Image, ImageDraw, ImageFont
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import asyncio
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from mpd import MPDClient
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import spidev
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IO_DELAY = (1.0 / 18.0)
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MPD_DELAY = 0.5
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SPI_SPEED = 500000
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class display(object):
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def __init__(self):
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self.fg = 1
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self.width = 128
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self.height = 32
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self.font_title = ImageFont.truetype('/usr/share/fonts/noto-cjk/NotoSansCJK-Light.ttc', 18)
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self.font_info = ImageFont.truetype('/usr/share/fonts/TTF/DejaVuSans.ttf', 10)
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self.img = Image.new('1', (self.width, self.height), color = not self.fg)
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self.d = ImageDraw.Draw(self.img)
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self.bar_redraw = True
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def render(self):
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print("render NYI")
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def animate(self, ticks):
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print("animate NYI")
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def get_image(self):
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temp = self.img
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return temp.rotate(-90,expand=True).tobytes()
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class display_playback(display):
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def __init__(self):
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super().__init__()
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self.title = ""
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self.title_scroll = 0
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self.title_scroll_max = -1
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self.info = ""
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self.syms = [];
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self.title_img = Image.new('1', (0, 0), color = not self.fg)
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def update_text(self, title):
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self.title = title
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w,h = self.d.textsize(self.title, font=self.font_title)
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if (w > self.width): # Check the text is short enough to be static
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self.title += "."
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w,h = self.d.textsize(self.title, font=self.font_title)
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w += 10 # Spacing between repetitions
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self.title_scroll_max = w
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self.title_scroll = self.title_scroll_max - 10
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# Prerender
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fw = w + self.width
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self.title_img = Image.new('1', (fw, h), color = not self.fg)
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font_shift = 5
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ImageDraw.Draw(self.title_img).text((0,-font_shift), self.title, font=self.font_title, fill=self.fg)
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self.title_img.paste(self.title_img, (w,0))
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self.title_img = self.title_img.crop((0,0,fw,h-font_shift))
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else:
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self.title_scroll = 0
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self.title_scroll_max = -1
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def update_info(self, info):
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self.info = info
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self.bar_redraw = True
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def update_syms(self, syms):
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self.syms = syms
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self.bar_redraw = True
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def scroll_title(self, amount = 1):
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if (self.title_scroll >= 0):
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self.title_scroll = (self.title_scroll + amount) % self.title_scroll_max
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def animate(self, ticks):
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self.scroll_title(ticks)
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def _render_bar(self):
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# Clear framebuffer
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self.d.rectangle((0,self.height - 1 - 10,self.width,self.height), fill = self.fg)
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# Playback info
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w,h = self.d.textsize(self.info, font=self.font_info)
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self.d.text((self.width-w-2, self.height - 1 - 10 - 1), self.info, font=self.font_info, fill=not self.fg)
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# Status icons
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status = "".join([" " + icon + " " for icon in self.syms])
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self.d.text((-2, self.height - 1 - 10 - 1), status, font=self.font_info, fill=not self.fg)
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def render(self):
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# Title (prerendered bitmap to shift)
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self.img.paste(self.title_img, (-self.title_scroll,0))
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# Other things were pre-rendered to the framebuffer directly
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if (self.bar_redraw):
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self.bar_redraw = False
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self._render_bar()
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# TODO: Maybe a progress bar?
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#self.d.line((0,15, 127,15), fill=self.fg)
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class display_manager(object):
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def __init__(self):
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self.tick = 0
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self.current_display = None
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def set_display(self, disp):
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self.current_display = disp
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def render(self):
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if (self.current_display):
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self.current_display.render()
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def get_image(self):
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if (self.current_display):
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return self.current_display.get_image()
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else:
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return []
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def animate(self, ticks):
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old_tick = self.tick
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self.tick += ticks
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if (self.current_display):
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if (not hasattr(self.current_display, 'ltick')):
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self.current_display.ltick = old_tick
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self.current_display.animate(self.tick - self.current_display.ltick)
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self.current_display.ltick = self.tick
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# 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)
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class radioserv:
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def handle_rx(self, rdata):
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# Handle key presses
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key_id = rdata[0] & 0x0F
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key_press_short = ((rdata[0] & 0xC0) == 128)
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if (key_press_short):
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print("Press key: {}".format(key_id))
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if (key_id == 0): # Tune-
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pass
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elif (key_id == 1): # Tune+
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self.mpd.previous()
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elif (key_id == 2): # Power
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self.kill_event.set()
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elif (key_id == 4): # Wheel
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self.mpd.pause()
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elif (key_id == 5): # Source
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pass
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elif (key_id == 6): # Info / Menu
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self.mpd.next()
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elif (key_id == 7): # PRESET
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pass
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# Handle rotary input
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rotary_delta = int(rdata[1])# - 128
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if (rotary_delta > 0):
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print("Rotary: {}".format(rdata[2]))
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# self.mpd.volume(rotary_delta)
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#print("Battery: {}".format(rdata[2]))
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async def io_main(self):
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while True:
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self.disp_mgr.animate(1)
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self.disp_mgr.render()
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rdata = self.spi.xfer([100, 101, 102], 50000, 1000)
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self.handle_rx(rdata)
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data = list(self.disp_mgr.get_image())
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rdata = self.spi.xfer(data, SPI_SPEED, 10000)
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await self.io_event.wait()
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self.io_event.clear()
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async def io_timer_main(self):
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while True:
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await asyncio.sleep(IO_DELAY)
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self.io_event.set()
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async def mpd_main(self):
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last_title = ""
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last_state = ""
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last_info = ""
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play_icon_map = {"play" : "▶️", "pause" : "ll", "stop" : "□"}
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while True:
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# Query MPD
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status = self.mpd.status()
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currentsong = self.mpd.currentsong()
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# Song title
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try:
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title = currentsong['title']
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try:
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title += " by " + currentsong['artist']
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except:
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pass
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except:
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try:
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title = currentsong['file'];
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except:
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title = ""
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if (title != last_title):
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self.disp_playback.update_text(title)
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last_title = title
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# Playback state (icons)
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if (status['state'] != last_state):
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icons = []
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icons.append(play_icon_map.get(status["state"], "?"))
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self.disp_playback.update_syms(icons)
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last_state = status["state"]
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# Playback info
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try:
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cm, cs = divmod(round(float(status['elapsed'])), 60)
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if "duration" in status:
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dm, ds = divmod(round(float(status['duration'])), 60)
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info = "#%d/%d %d:%02d/%d:%02d" % (int(status['song']) + 1, int(status['playlistlength']), cm, cs, dm, ds)
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else:
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info = "Radio %02d:%02d" % (cm, cs)
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except:
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info = "Stopped"
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if (info != last_info):
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self.disp_playback.update_info(info)
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# Sadly I can't use mpd.idle() here
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await asyncio.sleep(MPD_DELAY)
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async def main(self):
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# Connect to SPI
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self.spi = spidev.SpiDev()
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self.spi.open(0, 0)
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self.spi.max_speed_hz = SPI_SPEED
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self.spi.mode = 0b00
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# Connect to MPD
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self.mpd = MPDClient()
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self.mpd.connect("localhost", 6600)
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# Set up displays
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self.disp_playback = display_playback()
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self.disp_playback.update_text("Loading...")
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self.disp_mgr = display_manager()
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self.disp_mgr.set_display(self.disp_playback)
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# Create main tasks
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self.io_event = asyncio.Event()
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self.kill_event = asyncio.Event()
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io_task = asyncio.create_task(self.io_main())
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io_timer_task = asyncio.create_task(self.io_timer_main())
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mpd_task = asyncio.create_task(self.mpd_main())
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await self.kill_event.wait()
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self.kill_event.clear()
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io_timer_task.cancel()
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io_task.cancel()
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mpd_task.cancel()
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self.mpd.close()
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self.mpd.disconnect()
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def __init__(self):
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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try:
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loop.run_until_complete(self.main())
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finally:
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loop.run_until_complete(loop.shutdown_asyncgens())
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loop.close()
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r = radioserv()
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