- New make-pipeline function: single declarative call creates server,
mounts, encoders, and pipeline wiring from an output spec
- Pipeline owns encoder lifecycle (pipeline-encoders slot, auto-cleanup)
- Pipeline owns server when it creates one (pipeline-owns-server-p)
- Hook system wired: pipeline-add-hook fires on track-change and
playlist-change via pipeline-fire-hook
- stream-harmony.lisp slimmed: start is 1 make-pipeline + 2 hooks,
stop is 1 pipeline-stop call (cleanup automatic)
- Removed global encoder variables from Asteroid glue layer
- Backward-compatible: dj-session.lisp unchanged, cl-streamer:*server*
still set for legacy callers
Runtime verified: audio streams, metadata displays, crossfades work.
- Replace default float packer with int16 packer (mixed:make-packer :encoding :int16)
cl-mixed now handles float→s16 conversion in optimized C code instead of
per-sample Lisp loop. Halves pack buffer memory (2 vs 4 bytes/sample).
- Remove float-to-s16 helper (no longer needed)
- Fix resume-from-saved-state: when saved playlist differs from currently
scheduled playlist, use the scheduled one from the beginning instead of
continuing the old playlist. Prevents stale playlist playing after restart.
Setting (mixed:encoding pack) :int16 after server creation did not
change the pack's internal buffer format — data was still written as
float but read as int16, producing garbage audio.
Added TODO comment to investigate correct API for setting pack encoding
at creation time. The float→s16 conversion in Lisp works correctly.
- Fix api-post: skip Content-Type header on empty-body POSTs (Hunchentoot 400)
- Fix api-post/api-get: unwrap Radiance data wrapper, add try/catch + console logging
- Fix search-library-tracks: use raw SQL with parameterized ILIKE (S-SQL :offset broken)
- Fix search-library-tracks: quote file-path column name for Radiance hyphenated columns
- Add pipeline-stop-all-voices: immediately silence all Harmony voices on mixer
- Fix pause-auto-playlist: clear queue + skip + stop all voices (no more overlap)
- Override get-now-playing-stats during DJ session to show active deck info
- Add *resumed-from-saved-state* flag to prevent scheduler's db:connected
trigger from overwriting resumed playlist position with full playlist
- Use sb-ext:parse-native-namestring in play-file to prevent SBCL from
interpreting brackets in directory names (e.g. [WEB FLAC]) as wildcard
patterns, which caused non-simple-string pathname components that broke
cl-flac's CFFI calls
- cl-cron uses local time, not UTC: add utc-hour-to-local-hour
conversion so schedule hours fire at correct UTC times
(e.g. 12:00 UTC now fires at 15:00 local on UTC+3)
- Wrap each taglib field read in safe-tag with per-field error
handling so a type error in one field (e.g. album with non-simple
string) doesn't crash play-file or skip the track
- Use (coerce ... 'simple-string) instead of copy-seq for
guaranteed simple-string output from ensure-simple-string
- Prevent play-list thread death on scheduler playlist change:
drain-queue-into-remaining drains full scheduler queue at once,
updates loop-queue reference so repeat replays correct playlist,
top-level handler-case prevents thread from dying silently
- Fix taglib SIMPLE-ARRAY CHARACTER type errors:
ensure-simple-string coerces metadata strings and trims whitespace
- Fix FLAC::FILE slot unbound errors:
retry once with 200ms delay for transient init failures
- Improve playback state persistence:
save playlist path alongside track file so restart loads the
correct playlist instead of always falling back to stream-queue.m3u
- Startup now uses resume-from-saved-state to resolve saved playlist
and track position, falls back to stream-queue.m3u only if no state
- Enable loop-queue in play-list: repeats current playlist when tracks run out
- next-entry checks queue first so scheduler-queued playlists override repeat cycle
- Prevents silent stream / client reconnect loops between scheduled playlist changes
- Delay metadata/track-change notification by 1s after crossfade completes
- Log 'Loading next:' instead of 'Now playing:' during crossfade prep
- Add diagnostic logging: track duration check, crossfade trigger time
- harmony-load-playlist defaults to skip=nil: scheduler queues tracks
without interrupting current playback
- Save current track to .playback-state.lisp on each track change,
resume from saved position on restart
- Replace ~50 format-t debug statements in auth with log:info/log:warn
- Remove password hash logging for security
- Add .playback-state.lisp to .gitignore
- Add taglib dependency to cl-streamer/harmony system
- Add read-audio-metadata: reads artist/title/album from FLAC/MP3 tags
- Add format-display-title: builds 'Artist - Title' from tags, falls back to filename
- Add update-all-mounts-metadata: updates ICY metadata on all mount points
- Defer metadata update during crossfade until fade completes (listeners hear correct track)
- Fix play-list wait loop: was nested inside crossfade conditional, first track never waited
- Remove filename-derived :title from test playlist (taglib reads real tags now)
- Fix FDK-AAC C shim: use proper OUT_BITSTREAM_DATA=3 constant and INT types
- Add frame-aligned PCM accumulation buffer to AAC encoder for clean output
- Add fdkaac_encode and fdkaac_close to C shim (all FDK-AAC calls in C)
- Implement crossfade between tracks (3s overlap, 2s fade-in/out)
- Tune buffer: 90% drain sleep for encoding headroom, 64KB burst-on-connect
- Add FFI bindings for new shim functions
- Rewrite README.org with full architecture docs and integration plan
- Broadcast buffer: single-producer multi-consumer ring buffer with
per-client read cursors. 32KB burst-on-connect for fast playback.
Never blocks producer (overwrites old data for slow clients).
- Sequential playlist: play-list runs tracks one at a time using
Harmony's on-end callback + condition variable for completion.
- ICY metadata: set-now-playing called on each track change.
- Fixed string vs pathname bug in harmony:play (etypecase mismatch).
- Debug logging for client disconnect diagnosis.
Verified: browser plays shuffled FLAC playlist via 128kbps MP3 stream.
Major changes:
- streaming-drain: Custom drain that captures PCM from Harmony's pack
buffer (raw IEEE 754 floats in unsigned-byte-8 array), converts to
signed-16 PCM via CFFI, encodes to MP3 via LAME, and writes to
stream server's ring buffer
- Fixed ring buffer deadlock: buffer-read/buffer-write held lock then
called buffer-available which tried to acquire same lock. Created
internal %buffer-available/%buffer-free-space without locking.
- Fixed ring buffer zero-length guard for unbound variable in finally
- Fixed sleep duration in drain: was dividing raw byte count by
samplerate, now correctly converts to frames first
- Added flexi-streams wrapper for bivalent HTTP socket I/O
- Exported all public API symbols from cl-streamer package
- Added test-stream.lisp end-to-end test script
Verified: Amon Tobin FLAC -> 128kbps MP3 stream at localhost:8000
file reports: MPEG ADTS, layer III, v1, 128kbps, 44.1kHz, JntStereo
- harmony-backend.lisp: Audio pipeline connecting Harmony to encoders
- Uses :dummy drain to capture PCM without audio output
- Reads from packer bip-buffer via request-read/finish-read API
- Encodes PCM to MP3 via LAME and feeds to stream server
All three systems compile cleanly:
cl-streamer, cl-streamer/encoder, cl-streamer/harmony
Glenn Thompson