Android-encoded H.264 decoded cleanly with ffmpeg but showed diagonal
green/magenta banding on macOS. Root cause: shiguredo_video_toolbox's
I420Frame exposes y/u/v planes as bytes_per_row * height, including
CoreVideo's stride padding. VideoToolboxDecoder concatenated those
slices verbatim, then downstream code indexed the buffer as tight I420,
producing per-row drift that wrapped one full row every 16 chroma rows
(32 luma rows) at 960x540.
Add i420_frame_to_tight() helper that copies each plane row-by-row at
width / chroma_width using the plane's actual stride. All three macOS
decoders (H.264, HEVC, AV1) now call it. On first decode each logs the
real plane dimensions and strides at target wzp_video::videotoolbox so
future stride bugs are diagnosable from logs.
Verified mathematically against the corrupted dump:
band period = u_stride / (u_stride - chroma_width)
= 512 / (512 - 480) = 16 chroma rows = 32 luma rows
which matches the measured spacing exactly. 640x360 was unaffected
because chroma_width 320 is already 64-aligned.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Blockers 4 & 5: browser getUserMedia → JPEG IPC → Rust I420 pipeline;
remote video strip renders decoded frames via canvas; EncryptingTransport
wraps QuinnTransport so WZP AEAD is applied to all media (C2 fix).
Test fixes: HandshakeResult.session destructuring across relay/client/crypto
integration tests; video_codecs field added to all CallOffer/CallAnswer
structs; wzp-video pipeline_roundtrip integration tests added.
PRD docs: five Kimi-ready specs for E2E encryption, Android NDK 0.9 migration,
quality upgrade flow, wire-format hardening, and clippy debt.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add emit_call_debug events at every step of the Android connect/audio
path so failures are visible in the Settings debug log without needing
adb logcat:
- connect:handshake_start/done/failed (with timing)
- connect:android_audio_preflight (wzp_native loaded + RECORD_AUDIO
permission check via new has_record_audio_permission() JNI helper)
- connect:audio_stop_start/done
- connect:audio_mode_start/done/failed
- connect:audio_start_start/failed/panic/done (with oboe error code)
- connect:reuse_endpoint (endpoint reuse diagnostic)
Also adds has_record_audio_permission() to android_audio.rs — used in
the preflight event to confirm the OS has granted mic access before
wzp_oboe_start is called.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- oboe_bridge.cpp: return -6 (instead of silent 0) when streams do not
reach Started within the 2s poll deadline; also clean up streams on
that path so a retry can succeed
- main.ts: shared connectWithTimeout() so room-join and direct-call
auto-connect both get the 15s JS timeout; shared errorMessage() so
Tauri error objects don't show as [object Object] in toasts
- docs/bugs/001-android-join-voice-hang.md: comprehensive bug report
with root cause chain, evidence, return code table, and next steps
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
