poprhythm
d8add24c5e
The previous "fix" for Scale's crop bias paired Scale with a computed Translate, on the mistaken assumption that Scale's default pivot is the top-left corner. It isn't: pixlet's docs say the default origin is already the center (0.5, 0.5). That Translate was sized assuming Scale had no self-centering at all, so it overcorrected, visibly skewing the zoom toward the bottom-right -- the opposite of the bug it meant to fix. animation.Origin does directly and correctly what that Translate was clumsily approximating, so the Translate (and its rounding="none" workaround) is removed entirely in favor of Origin. This also means "strong" no longer needs the 1.45 safety cap -- restored to 1.7, since the black-border risk was specific to the Translate formula, not Scale + Origin (verified via the calibration tool at several off-center origins). Added a "Zoom position" schema option: Center (default) or Random. Random picks from a handful of preset off-center spots, chosen per-track from subsonic_id the same way the old corner-selection logic worked, so a still-playing track doesn't jump between spots on every refresh. Verified: no black border, no popping (confirmed via frame-delta analysis -- smooth throughout, no Translate means rounding is moot), and payload well under the 460KB limit at every zoom level/position combination, against the live station.
442 lines
18 KiB
Python
442 lines
18 KiB
Python
"""
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Applet: SUB/WAVE Now Playing
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Summary: Shows what's playing on a SUB/WAVE station
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Description: Configure with your SUB/WAVE (github.com/perminder-klair/subwave) station's base URL to display the current track, artist, show, host, album art, time/temp, and a progress bar.
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Author: poprhythm
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"""
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load("render.star", "render")
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load("schema.star", "schema")
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load("http.star", "http")
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load("cache.star", "cache")
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load("time.star", "time")
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load("animation.star", "animation")
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DEFAULT_STATION_URL = ""
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NOWPLAYING_TTL = 20
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COVER_TTL = 300
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# These match SUB/WAVE's own web UI theme picker (Blueprint, Classic Dark,
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# Classic Light, Cyberpunk, Flare, Recon, Signal, Vinyl), so a station's own
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# site theme can be mirrored on the device. Each scheme sets a background
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# fill, the main text color (title/artist/show), an accent (host/DJ name +
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# progress bar fill), a muted meta color (time/temp), a separator, and the
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# progress bar's empty-track color.
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COLOR_SCHEMES = {
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"blueprint": {
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"background": "#0a1128",
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"text": "#8ecae6",
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"accent": "#4a90e2",
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"meta": "#3f5a7a",
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"separator": "#1f3a5f",
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"bar_empty": "#12223d",
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},
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"classic_dark": {
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"background": "#1a1a1a",
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"text": "#f0e6d2",
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"accent": "#d32f2f",
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"meta": "#8a8070",
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"separator": "#3a3a3a",
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"bar_empty": "#2b2b2b",
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},
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"classic_light": {
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"background": "#f0e6d2",
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"text": "#1a1a1a",
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"accent": "#e63946",
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"meta": "#7a7062",
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"separator": "#d8cdb8",
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"bar_empty": "#ded2ba",
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},
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"cyberpunk": {
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"background": "#0d0d0d",
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"text": "#22d3ee",
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"accent": "#ec4899",
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"meta": "#7a7a8a",
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"separator": "#2a2a35",
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"bar_empty": "#241f2e",
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},
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"flare": {
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"background": "#120a00",
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"text": "#ff8c1a",
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"accent": "#ff6600",
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"meta": "#8a5a2a",
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"separator": "#3a2000",
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"bar_empty": "#2a1800",
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},
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"recon": {
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"background": "#4a4331",
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"text": "#f2ecd9",
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"accent": "#ff8c3a",
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"meta": "#a89f85",
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"separator": "#2a2519",
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"bar_empty": "#332e20",
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},
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"signal": {
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"background": "#2b2b2b",
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"text": "#d9d9d9",
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"accent": "#9a9a9a",
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"meta": "#6e6e6e",
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"separator": "#3a3a3a",
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"bar_empty": "#1e1e1e",
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},
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"vinyl": {
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"background": "#3e2f23",
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"text": "#e8d5b5",
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"accent": "#c97d3d",
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"meta": "#8a7358",
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"separator": "#2a1f16",
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"bar_empty": "#241b13",
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},
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}
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DEFAULT_COLOR_SCHEME = "cyberpunk" # matches the station's own site theme
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# How far in the album art zoom goes, relative to its fully-zoomed-out rest
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# state (see _art_widget below for why scale never goes below 1.0).
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ZOOM_LEVELS = {
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"off": 1.0,
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"subtle": 1.15,
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"moderate": 1.4,
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"strong": 1.7,
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}
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DEFAULT_ZOOM_LEVEL = "moderate"
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# Where the zoom centers on, as animation.Origin fractions of the image's
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# own 36x36 bounds. Kept modest (0.3-0.7, not full 0.0-1.0) and verified
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# safe (no black border, even at the strongest 1.7x zoom) via the
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# calibration tool -- more extreme corners weren't tested and may not be.
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# Picked per-track (stable via subsonic_id, like the old corner-selection
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# logic) rather than per-render, so a still-playing track doesn't jump
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# between spots on every NOWPLAYING_TTL refresh. Only used when the
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# "Zoom position" schema field is set to "random" -- "center" always zooms
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# on the image's own center, exposed as a config choice since some covers
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# (e.g. ones with a centered logo or face) read better with a predictable
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# center zoom than a per-track random one.
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ZOOM_CENTER_SPOT = (0.5, 0.5)
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ZOOM_RANDOM_SPOTS = [
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(0.5, 0.5),
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(0.3, 0.3),
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(0.7, 0.7),
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(0.3, 0.7),
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(0.7, 0.3),
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]
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DEFAULT_ZOOM_POSITION = "center"
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def _zoom_spot_for_track(zoom_position, subsonic_id):
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if zoom_position != "random":
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return ZOOM_CENTER_SPOT
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total = 0
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for ch in subsonic_id.elems():
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total += ord(ch)
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return ZOOM_RANDOM_SPOTS[total % len(ZOOM_RANDOM_SPOTS)]
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def main(config):
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station_url = config.get("station_url", DEFAULT_STATION_URL)
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if station_url:
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station_url = station_url.rstrip("/")
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colors = COLOR_SCHEMES.get(config.get("color_scheme", DEFAULT_COLOR_SCHEME), COLOR_SCHEMES[DEFAULT_COLOR_SCHEME])
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zoom_scale = ZOOM_LEVELS.get(config.get("zoom_level", DEFAULT_ZOOM_LEVEL), ZOOM_LEVELS[DEFAULT_ZOOM_LEVEL])
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zoom_position = config.get("zoom_position", DEFAULT_ZOOM_POSITION)
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if not station_url:
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return render.Root(child = _with_background(_message_screen(["Set station URL", "in app settings"], colors), colors))
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now = _fetch_now_playing(station_url)
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if now == None:
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return render.Root(child = _with_background(_message_screen(["Can't reach", "station"], colors), colors))
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if not now["online"]:
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return render.Root(child = _with_background(_message_screen([now["station"], "offline"], colors), colors))
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art = _fetch_cover(station_url, now["subsonic_id"])
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progress = _track_progress(now["subsonic_id"], now["duration"])
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# The show/host and time/temp rows always render, even when empty, so
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# they hold a fixed vertical position regardless of which fields a given
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# track/moment actually has data for -- rather than the layout shifting
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# up when e.g. there's a show but no DJ credited, or no show at all.
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show_host_row = [render.Text(now["show"], font = "tom-thumb", color = colors["text"])]
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if now["host"]:
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show_host_row.append(render.Text(" " + now["host"], font = "tom-thumb", color = colors["accent"]))
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top_lines = [
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render.Marquee(width = 32, child = render.Text(now["title"], color = colors["text"])),
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render.Marquee(width = 32, child = render.Text(now["artist"], color = colors["text"])),
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render.Box(width = 32, height = 1, color = colors["separator"]),
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render.Marquee(width = 32, child = render.Row(children = show_host_row)),
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render.Marquee(width = 32, child = render.Text(now["time_temp"], font = "tom-thumb", color = colors["meta"])),
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]
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children = [render.Column(children = top_lines)]
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if progress != None:
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children.append(_progress_bar(progress["fraction"], colors, width = 32))
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text_column = render.Box(
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width = 32,
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height = 32,
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child = render.Column(
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main_align = "space_between",
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cross_align = "start",
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expanded = True,
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children = children,
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),
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)
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if art:
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content = render.Row(children = [_art_widget(art, zoom_scale, zoom_position, now["subsonic_id"]), text_column])
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else:
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content = render.Column(
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main_align = "center",
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cross_align = "center",
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expanded = True,
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children = [
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render.Marquee(width = 64, child = render.Text(now["title"], color = colors["text"])),
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render.Marquee(width = 64, child = render.Text(now["artist"], color = colors["text"])),
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],
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)
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return render.Root(child = _with_background(content, colors))
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def _with_background(child, colors):
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return render.Stack(children = [
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render.Box(width = 64, height = 32, color = colors["background"]),
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child,
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])
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# Album art gets a slow "Ken Burns" breathing effect: starts and ends on
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# the full frame, easing in to a zoomed-in crop at the midpoint, on a
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# continuous loop -- not a one-shot reveal. A one-shot version (start
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# zoomed in, end on the full frame, then hold) looked jumpy: since the app
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# re-renders on NOWPLAYING_TTL
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# and each fresh render restarts its own animation from tick 0, whatever the
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# *previous* pushed image happened to be showing at that moment gets
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# abruptly replaced by a fresh zoomed-in frame. The back-and-forth loop
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# doesn't eliminate that (a server-side re-render always restarts at tick 0
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# regardless), but ending exactly where it started means the animation also
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# loops seamlessly on-device between refreshes.
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#
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# Duration is intentionally short (a handful of seconds each way), not the
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# ~60s round-trip originally tried: on the real device/server, a fresh
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# render replaces the still-playing animation well before a minute-long
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# cycle can complete, so only the outbound half (zoom out) was ever visible
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# and it never appeared to "zoom back in". A short loop guarantees at least
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# one full out-and-back cycle plays before that happens.
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#
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# Art is rendered slightly oversized (36x36, vs. the 32x32 display slot).
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# animation.Scale is only ever applied at 1.0 or above here -- empirically,
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# scaling this *below* 1.0 (tried while chasing a "show the literal whole
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# image at rest" design) reintroduces a real, on-device black-border bug:
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# below roughly 0.9-0.95 a visible gap opens up along one edge, well before
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# the math (scaled size vs. box size) would predict any gap at all, so it
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# isn't a simple "runs out of image" overflow -- treat scale < 1.0 as
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# unsafe regardless of the numbers. That rules out "native size at rest,
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# shrink down to reveal everything" -- so instead ART_SIZE is kept just
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# barely larger than ART_SLOT: at the safe floor of scale = 1.0, only
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# ART_SLOT/ART_SIZE (~89%) of the image is visible, which reads as
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# "fully zoomed out" (a sliver cropped off each edge, not noticeable) while
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# leaving just enough headroom above 1.0 for a real zoom-in effect. The
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# zoom-in amount itself (`zoom_scale`, from the ZOOM_LEVELS schema option)
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# must stay >= 1.0 for the same reason.
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ART_SIZE = 36
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ART_SLOT = 32
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ART_ZOOM_DURATION = 200 # 10s round-trip (5s in, 5s out) at the default 50ms/tick
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def _art_widget(art_bytes, zoom_scale, zoom_position, subsonic_id):
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art = render.Image(src = art_bytes, width = ART_SIZE, height = ART_SIZE)
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# Always route through animation.Transformation, even when zoom is off
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# (a degenerate animation whose two keyframes are both Scale(1.0, 1.0),
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# i.e. no visible movement). Wrapping the art in a Transformation shifts
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# its crop by a few pixels versus a bare, unwrapped Image in the same
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# Box -- confirmed empirically, even at an explicit Scale(1.0, 1.0) --
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# so a plain-Image "off" path and a Transformation-wrapped zoom path
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# don't actually agree on framing despite both nominally being "scale
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# 1.0". Using the same wrapper unconditionally guarantees the "off"
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# state and the rest state of every zoom level line up exactly.
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#
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# `origin` picks where the zoom centers on, which also gives a free
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# "zoom to a different spot each time" effect (ZOOM_SPOTS above) by
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# just varying it per track. An earlier version tried to recenter the
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# zoom by pairing Scale with a *computed* Translate, on the mistaken
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# assumption that Scale's default pivot is the top-left corner -- it
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# isn't; pixlet's own docs say the default origin is already the
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# center (0.5, 0.5). That Translate was sized assuming Scale had no
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# self-centering at all, so it overcorrected, visibly skewing the zoom
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# toward the bottom-right -- the opposite of the bug it was meant to
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# fix. Since `origin` already does directly and correctly what that
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# Translate was clumsily approximating, this uses `origin` alone.
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origin_x, origin_y = _zoom_spot_for_track(zoom_position, subsonic_id)
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top_scale = max(zoom_scale, 1.0)
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zoom = animation.Transformation(
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child = art,
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duration = ART_ZOOM_DURATION,
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origin = animation.Origin(origin_x, origin_y),
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keyframes = [
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animation.Keyframe(
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percentage = 0.0,
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transforms = [animation.Scale(1.0, 1.0)],
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),
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animation.Keyframe(
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percentage = 0.5,
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transforms = [animation.Scale(top_scale, top_scale)],
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curve = "ease_in_out",
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),
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animation.Keyframe(
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percentage = 1.0,
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transforms = [animation.Scale(1.0, 1.0)],
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curve = "ease_in_out",
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),
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],
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)
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return render.Box(width = ART_SLOT, height = ART_SLOT, child = zoom)
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def _message_screen(lines, colors):
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return render.Column(
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main_align = "center",
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cross_align = "center",
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expanded = True,
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children = [render.Text(line, font = "tom-thumb", color = colors["text"]) for line in lines],
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)
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def _progress_bar(fraction, colors, width = 32, height = 2):
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filled = int(width * fraction + 0.5)
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filled = max(0, min(filled, width))
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children = []
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if filled > 0:
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children.append(render.Box(width = filled, height = height, color = colors["accent"]))
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if filled < width:
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children.append(render.Box(width = width - filled, height = height, color = colors["bar_empty"]))
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return render.Row(children = children)
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def _fetch_now_playing(station_url):
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rep = http.get(station_url + "/api/now-playing", ttl_seconds = NOWPLAYING_TTL)
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if rep.status_code != 200:
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return None
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data = rep.json()
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# `.get(key, {})` only falls back to the default when the key is
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# *absent* -- SUB/WAVE sends these as explicit JSON null (e.g.
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# activeShow between scheduled shows), which decodes to Starlark None
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# and passes right through .get(), so `or {}` is needed too.
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np = data.get("nowPlaying", {}) or {}
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dj = data.get("dj", {}) or {}
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context = data.get("context", {}) or {}
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active_show = context.get("activeShow", {}) or {}
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return {
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"title": np.get("title", "Unknown title"),
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"artist": np.get("artist", "Unknown artist"),
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"subsonic_id": np.get("subsonic_id", ""),
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"duration": np.get("duration", 0),
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"station": dj.get("station", "SUB/WAVE"),
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"show": active_show.get("name", ""),
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"host": dj.get("name", ""),
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"time_temp": _format_time_temp(context.get("clock", {}) or {}, context.get("weather", {}) or {}),
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"online": bool(data.get("streamOnline", False)),
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}
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def _format_time_temp(clock, weather):
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parts = []
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display_time = clock.get("display", "")
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if display_time:
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parts.append(display_time)
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temp = weather.get("temp", None)
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unit = weather.get("tempUnit", "")
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if temp != None:
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parts.append("%d°%s" % (int(temp), unit))
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return " · ".join(parts)
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def _fetch_cover(station_url, subsonic_id):
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if not subsonic_id:
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return None
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rep = http.get(station_url + "/api/cover/" + subsonic_id, ttl_seconds = COVER_TTL)
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if rep.status_code != 200:
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return None
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return rep.body()
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# The now-playing API reports track duration but not elapsed/remaining time,
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# so we track playback position ourselves: the first time we see a given
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# subsonic_id, we stamp the current wall-clock time in the cache; on later
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# renders (while the cache entry is still alive) we diff against that stamp
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# to get elapsed seconds. This only works on a long-lived server process
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# with a persistent cache (confirmed true for tronbyt/server's in-memory
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# cache) -- a one-shot `pixlet render` CLI call always starts a fresh
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# process with an empty cache, so progress will always show 0% locally.
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def _track_progress(subsonic_id, duration):
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if not subsonic_id or not duration:
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return None
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key = "subwave_track_start_" + subsonic_id
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now_unix = time.now().unix
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cached = cache.get(key)
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if cached == None:
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cache.set(key, str(now_unix), ttl_seconds = int(duration) + 30)
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start_unix = now_unix
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else:
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start_unix = int(cached)
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elapsed = max(0, now_unix - start_unix)
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remaining = max(0, duration - elapsed)
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fraction = min(1.0, float(elapsed) / float(duration))
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return {"elapsed": elapsed, "remaining": remaining, "fraction": fraction}
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def get_schema():
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return schema.Schema(
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version = "1",
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fields = [
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schema.Text(
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id = "station_url",
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name = "Station URL",
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desc = "Base URL of your SUB/WAVE station, e.g. https://radio.example.com",
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icon = "server",
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default = DEFAULT_STATION_URL,
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),
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schema.Dropdown(
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id = "color_scheme",
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name = "Color scheme",
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desc = "Matches SUB/WAVE's own web UI themes -- pick the one your station uses.",
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icon = "palette",
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default = DEFAULT_COLOR_SCHEME,
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options = [
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schema.Option(display = "Cyberpunk", value = "cyberpunk"),
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schema.Option(display = "Blueprint", value = "blueprint"),
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schema.Option(display = "Classic Dark", value = "classic_dark"),
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schema.Option(display = "Classic Light", value = "classic_light"),
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schema.Option(display = "Flare", value = "flare"),
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schema.Option(display = "Recon", value = "recon"),
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schema.Option(display = "Signal", value = "signal"),
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schema.Option(display = "Vinyl", value = "vinyl"),
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|
],
|
|
),
|
|
schema.Dropdown(
|
|
id = "zoom_level",
|
|
name = "Album art zoom",
|
|
desc = "How far the album art zooms in during its breathing effect.",
|
|
icon = "magnifyingGlass",
|
|
default = DEFAULT_ZOOM_LEVEL,
|
|
options = [
|
|
schema.Option(display = "Off", value = "off"),
|
|
schema.Option(display = "Subtle", value = "subtle"),
|
|
schema.Option(display = "Moderate", value = "moderate"),
|
|
schema.Option(display = "Strong", value = "strong"),
|
|
],
|
|
),
|
|
schema.Dropdown(
|
|
id = "zoom_position",
|
|
name = "Zoom position",
|
|
desc = "Where the album art zoom centers on.",
|
|
icon = "crosshairs",
|
|
default = DEFAULT_ZOOM_POSITION,
|
|
options = [
|
|
schema.Option(display = "Center", value = "center"),
|
|
schema.Option(display = "Random", value = "random"),
|
|
],
|
|
),
|
|
],
|
|
)
|