- Add JamTrackGetMixdowns API call during player initialization
- Organize mixdowns into master/customMixes/stems hierarchy
- Store availableMixdowns in Redux (activeSessionSlice)
- Set default mixdown selection (prefer master, fallback to first)
- Set activeMixdown in Redux for UI display
- Non-fatal error handling (can play without explicit selection)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add handleSeek with useCallback wrapper
- Implement UAT-003 fix pattern (pending seek while paused, immediate while playing)
- Store pending seek in pendingSeekRef when paused, update UI immediately
- Apply pending seek on resume in handlePlay (already implemented)
- Add seek slider with correct min/max/value bindings
- Disable slider during operations and before duration loaded
- Parse slider value to int before passing to handler
- Error handling for seek failures
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add polling effect with 500ms visible, 2000ms hidden intervals
- Fetch position and duration via JamTrackGetPositionMs/GetDurationMs
- Parse string values to int before using
- Conditional state updates (only when values change)
- End-of-track handling (stop and reset when position >= duration)
- Add formatTime utility for MM:SS display
- Update render to show formatted time
- Add visibilitychange listener for dynamic interval adjustment
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add handlePlay with loadJamTrack integration and pause-resume logic
- Add handlePause for pausing playback
- Add handleStop for stopping and resetting position
- Implement UAT-003 fix pattern (pendingSeekRef for pause-seek-resume)
- Add isOperating flag to prevent rapid clicks
- Render playback buttons with proper disabled states
- Error handling with typed errors (file/network red, playback yellow)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Enhanced loadJamTrack: checks sync state, triggers download if needed
- downloadJamTrack: handles download flow with progress callbacks
- checkJamTrackSync: verifies track synchronization state
- loadJMEP: loads JMEP data if available
- seekJamTrack: applies UAT-003 fix pattern for pending seek while paused
- closeJamTrack: stops playback and clears state
- All thunks use fqId format correctly
- Global callbacks set up for native client download progress
- extraReducers handle all loading states
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Summary:
- Fixed critical fqId bug blocking JamTrack functionality
- Established Redux foundation with 10 new reducers and 8 new selectors
- Extended mediaSlice with jamTrackState and downloadState structures
- Extended activeSessionSlice with mixdown management
- Extended sessionUISlice with JamTrack UI preferences
State updates:
- Phase 5 Plan 1 complete (1/5 in phase)
- Updated decisions with fqId fix and state structure patterns
- Updated session continuity for Plan 2
Commits:
- bb74c5046: fix(05-01): fix loadJamTrack fqId bug and extend mediaSlice state
- 52ee8f3ea: feat(05-01): extend activeSessionSlice and sessionUISlice for JamTrack
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
activeSessionSlice extensions:
- Add availableMixdowns array to store mixdown objects
- Add activeMixdown for currently selected mixdown
- Add mixdownCache for package metadata
- Add 4 reducers: setAvailableMixdowns, setActiveMixdown, cacheMixdownPackage, clearMixdowns
- Add 3 selectors for mixdown state
sessionUISlice extensions:
- Add openJamTrack to track currently open JamTrack ID
- Add jamTrackUI for user preferences (lastUsedMixdownId, volume)
- Add 3 reducers: setOpenJamTrack, updateJamTrackUI, clearOpenJamTrack
- Add 2 selectors for JamTrack UI state
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Phase 5: JamTrack Implementation
- Vision and goals documented
- Essential requirements identified
- Scope boundaries defined
Focus: Download + play JamTracks + select existing mixdowns
Quality bar: Match Backing Track player feel and reliability
Out of scope: Custom mix creation (future phase)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Designed JKSessionJamTrackPlayer with props interface and state management
- Defined sub-components: MixdownSelector, PlaybackControls, SeekBar, DownloadSyncProgress, ErrorBanner
- Documented component lifecycle and initialization pattern
- Implemented playback controls with UAT-003 fix (pending seek while paused)
- Applied Phase 3 performance patterns (visibility-aware polling, useCallback, lazy updates)
- Created props vs Redux decision matrix
- Compared to Backing Track player with reusable patterns identified
Race condition fix:
- After SessionStartPlay, verify actual playback state
- Add 100ms delay to let native client update
- Check isSessionTrackPlaying() before setting state
- Prevents "double click" issue where component thinks it's playing but isn't
Loop diagnostics:
- Add [LOOP] logging to track loop changes
- Add [POLLING] logging when track reaches end
- Log whether loop is enabled and native client behavior
- Help diagnose why loop not repeating
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Loop fix:
- Check isLooping flag before stopping at end of track
- If loop enabled, let native client handle looping
- Don't call SessionStopPlay() which overrides loop behavior
Play diagnostics:
- Add [PLAY] logging to diagnose end-of-track restart issue
- Log isOperating, currentPositionMs, durationMs on each handlePlay call
- Log "at end" check to see if threshold logic is correct
Volume issue (known limitation):
- backingTrackMixers is empty in popup mode
- Volume control requires mixer system not available in this context
- May need different architecture or accept as limitation
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Move getBackingTrackPath definition before handleLoopChange
- Remove duplicate definition later in file
- Fixes "Cannot access before initialization" error
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add [VOL] logs to diagnose volume control issue
- Log mixer state and volume changes
- Help identify why volume slider not working
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Issue 1 - End of track playback:
- When track ends, call SessionStopPlay() and reset position to 0
- Ensures clean state for next playback
- Fixes "3 click" bug when restarting after track ends
Issue 2 & 3 - Volume and loop not working in popup mode:
- Add getBackingTrackPath() helper to handle both formats
- In popup mode, backingTrack is a string (path)
- In modal mode, backingTrack is an object with .path property
- Update handleLoopChange to use helper
- Fixes "No backing track available" error
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Remove all [RENDER], [EFFECT], and [DEBUG] console logs
- Keep only error logging for production
- Player now loads successfully in popup mode
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Modify duration useEffect to check (isOpen || isPopup)
- In popup mode, window being open means player is "open"
- Add isPopup to dependency array
- This fixes duration loading in popup mode
Root cause: Popup mode doesn't pass isOpen prop, so condition failed
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add missing callback dependencies to fetchDuration useEffect
- Add temporary DEBUG logging to diagnose loading issues
- Ensure handleError, formatTime, clearError are in dependency array
This fixes the issue where player got stuck on "Loading track..."
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add visibility tracking to reduce polling when tab hidden (500ms→2000ms)
- Wrap all handlers in useCallback for stable references
- Add conditional state updates in polling (only update if changed)
- Remove all diagnostic [BTP] logging for production
- Add proper React performance optimizations
Performance improvements:
- Reduced CPU usage when tab hidden (4x less frequent polling)
- Eliminated unnecessary re-renders with useCallback
- Cleaner console output (errors only)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implemented defensive handling for edge cases and failure scenarios:
Cleanup on unmount:
- Added useEffect to stop playback on component unmount
- Prevents stale state when player closes while playing
- Catches errors gracefully
File format validation:
- Validates duration in fetchDuration (rejects 0 or NaN)
- Warns about suspicious durations (<1s or >10h)
- May indicate parsing errors
Network handling:
- Already implemented: consecutivePollingErrorsRef tracks failures
- Shows error after 3 consecutive polling failures
- Stops polling and allows retry
jamClient guards:
- Already implemented: null checks in all handlers
- Early return with error message if unavailable
Invalid state recovery:
- Polling detects mismatched isPlaying state
- Force syncs UI to jamClient state
- Logs warnings for debugging
Graceful degradation:
- Error states show but player stays open
- Provides Dismiss and Retry options
- No crashes or frozen UI
All edge cases handled with defensive coding and proper cleanup.
Decision: Implement fix (user-approved)
Implemented state machine workaround for jamClient limitation where
SessionTrackSeekMs() doesn't register when track is paused.
Fix approach:
- Verify position after seek attempt
- If paused and position unchanged, store in pendingSeekPositionRef
- Before resuming playback:
1. SessionStopPlay() to reset state
2. SessionTrackSeekMs() to apply stored position
3. SessionStartPlay() to resume
Result: Seek now works consistently whether playing or paused.
Cleaned up diagnostic logging for production use.
Added comprehensive diagnostic logging and tested multiple approaches
to resolve seek-while-paused limitation discovered in Phase 2 UAT.
Investigation approaches:
1. Verify position after SessionTrackSeekMs() call
- Logs position before/after seek
- Confirms seek doesn't register when paused
2. State machine workaround
- Store pending seek position in pendingSeekPositionRef
- Apply before resume with SessionStopPlay() → SessionTrackSeekMs() → SessionStartPlay()
- Clear pending position on stop
Diagnostic logging prefix: [BTP-UAT003]
Documented findings in code comments for Task 3 decision.
See: .planning/phases/02-backing-track-seek-controls/02-01-ISSUES.md (UAT-003)
Removed conditional fallback logic and implemented proper jamClient methods:
Volume control:
- Uses mixer system with SessionSetTrackVolumeData
- Accesses backing track mixer from Redux (selectBackingTrackMixers)
- Converts 0-100% slider to dB range (-80 to +20)
- Updates trackVolumeObject with volL/volR
Loop control:
- Uses SessionSetBackingTrackFileLoop(path, loop)
- Requires backing track path
- Direct API call without conditional checks
Both methods now follow established patterns from legacy implementation.
UAT-004: When seeking to end while paused, then clicking play, the
player would break (slider jumps to 0, no audio, play button stops working).
Root cause: jamClient enters end-of-track state when position >= duration.
Calling SessionStartPlay() without resetting causes undefined behavior.
Solution:
- Detect when position is at/near end (within 100ms)
- Call SessionStopPlay() to reset jamClient state
- Seek to position 0
- Then start playback normally
Also added diagnostic logging to handlePlay, handleSeek, and polling
to help debug playback state transitions.
Nuwan