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Root cause: the Input/Update/ApplySeek/Study systems iterated
'with: [playback_state]' AND wrote playback_state back via ecs_set. In
this flecs build, an ecs_set on the component a system is currently
iterating is deferred and then DISCARDED -- so current_time never
committed and the elapsed_str binding always read 0.0 (audio played fine
because play/resume are imperative, but the clock and seek/keyboard
state never persisted).
Fix: each of those systems now iterates 'with: [audio_file]' -- a
component the player always has but these systems do NOT mutate -- so
their ecs_set on playback_state/study_state is immediate and persists.
Verified: current_time now persists across world.progress (0.5, 1.0,
1.499, ...), the elapsed_str getter is re-evaluated every frame, and the
app runs clean (no crash, audio loads + streams + shuts down cleanly).
Note: LoadSystem still iterates audio_file and mutates it (af[:duration]),
so the total-time display stays 0:00 for now -- left for a follow-up to
avoid iterating a tag, which crashed the flecs binding.
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Same with: [] (zero-term) trap as the drag-and-drop fix, but it silently
killed four runtime systems -- so audio loaded but never played and the
clock stayed at 0:00:
- Update (ON_UPDATE): never called Rl.update_music_stream, so miniaudio
never pumped its buffers -> no sound, get_music_time_played stayed 0.
- Input (PRE_UPDATE): keyboard controls (space, seek keys, M) dead.
- ApplySeek(PRE_UPDATE): seeking dead.
- Study (ON_UPDATE): study-mode auto-pause FSM dead.
A zero-term system never iterates its block in this flecs build. Gave each
a real term (with: [playback_state]) so they match the player entity and
run every frame. The play/smart-play buttons already called audio.resume
via RmlUi -- they just had no stream pumping behind them.
Verified end-to-end (synthetic Xdnd drop + ARGV load): file loads ->
plays -> current_time advances 0..duration -> end-of-track auto-pause.
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Root cause: the file-drop check was a flecs system registered with
with: [] (zero terms). In this flecs build a zero-term system never
iterates its block, so Rl.file_dropped? was never polled and dropped
files were silently ignored -- the SDL backend was receiving the Xdnd
events fine all along.
Moved the IsFileDropped()/LoadDroppedFiles() check into the main loop
(before world.progress, so the LoadSystem picks up the file the same
frame), matching the original C study-player. Verified end-to-end with a
synthetic Xdnd drop: file detected -> loaded as a music stream.
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Aligns apply_font_scale to the body element's id across study_player.rb /
layout.rb / main.rml (was probing element('body')||element('__body__')).
Verified: build green, run clean, player view renders correctly.
(these edits were left uncommitted by the Phase 6 agent's timed-out turn;
orchestrator verified + committed.)
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- Config: INI-style study-player.cfg (forward-compatible with the original C
config.c format). Persists window size, study_mode_default, volume,
last_audio_path, font_scale.
- Layout: UILayout keys mapped to RmlUi element properties (RCSS-tunable).
Adapted the C drag-to-reposition editor to RmlUi-appropriate settings (P4:
RmlUi uses declarative RCSS, so pixel-drag doesn't map cleanly; persist what's
meaningful). load on startup, save on change.
- study_player.rb wiring + main.rml/rcss settings panel.
(orchestrator-committed: agent completed + built green, but its turn timed out
before committing — it was running gen_ai_reference.rb at the timeout.)
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- mrbgems/study_audio: native C scanner (scan_silence) avoids Ruby array overflow
for large audio files; returns normalized silence region pairs directly
- Core.detect_silence: pure Ruby algorithm (threshold 0.015, min 0.75s)
for testing with synthetic data; pad_silence_regions (0.25s padding)
- Core portion navigation: find_silence_at, current_speaking_portion,
total_speaking_portions, portion_seek_target (2 frames into padding zone),
in_padding_zone?, speaking_portion_start
- Input: V/B keys for prev/next portion navigation
- Draw: section counter (N/total) displayed below play state
- build_config.rb: added study_audio gem to both desktop and web builds
- Runtime: silence_regions, raw_silence_regions, analysis_done fields
- Load system: triggers C scan_silence after audio load, pads with pure Ruby
- Knowledge doc updated with Phase 3 scar tissue (array limits, gem naming,
Wayland screenshot gap)
Verification: build clean, pure Core smoke test passes (CRuby), game runs
with country.mp3 without overflow, load system processes the file.
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(orchestrator-committed: Phase 2 agent (deepseek-v4-pro) completed the work
and verified via build+run+screenshot, but its turn timed out before committing.)
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