Per-chunk submit->render wait and render time (audio_thread), the push
lead against the playhead, the negotiated stream config, and the true
device-side callback rate (outputdevice) -- the ground truth used to
localize the playback starvation to the sequence-rate/clock mismatch.
Two playback-audio defects found while chasing periodic pops, clipped
words and repeated phrases:
1. The playback clocks are created at engine init with the fallback
rate (hd_1080p25) and never updated, while audio chunks are sized by
the SEQUENCE time base (30/1 from the broken default). The playhead
advanced at 25 fps but each chunk carried only 1600 samples, so
production ran at 40000 samples/s against the device's 48000 -- ~17%
of playback time was zero-filled silence (clipped words). tick() now
syncs both clocks to the sequence's actual rate.
2. The underrun self-heal cleared the whole device queue (~190 ms of
unheard content skipped), reset the prefetch (whose first
re-rendered chunk was then always dropped as late) and re-anchored
the master clock, re-rendering already-played audio whenever the
playhead lagged (audible as a pop plus a repeated phrase, every
~1.1 s). It now trims just the stale lead from the queue
(PreviewAudioDevice::drop_front_frames): the zero-fill already
advanced the output clock past that content, so the rest of the
queue stays audible and the anchor stays valid.
Also adds the OAK_DEBUG_AUDIO event log used to diagnose all of this
(prefetch resets, late drops, underruns, heals, reanchor jumps,
per-tick queue state).
All crates take the oak-* kebab-case naming (oak-audio, oak-codec,
oak-common, oak-core, oak-ffmpeg-link, oak-node, oak-otio, oak-plugin,
oak-render, oak-storage, oak-task, oak-timeline, oak-undo), with the
lib identifiers rewritten (oakrender:: -> oak_render::, oakcore_rs:: ->
oak_core::, ...) across all 226 referencing files.
The GUI application moves from the workspace root into
crates/oak-app/: src/, build.rs (paths fixed for the new location) and
tests/ travel with it, the root Cargo.toml becomes workspace-only
([workspace] + workspace.package + profiles), and the app package
inherits the workspace version. The screenshots example becomes a
standalone crate examples/simple_player/ with its own Cargo.toml.
Every crate now inherits the single workspace version
(version.workspace = true), and the workflows' crate paths and the
build docs follow the renames.
Validated with a clean cargo check --workspace.
Mike-Solar