Fast channel switch#11
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lbb00 merged 26 commits intoMar 11, 2026
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Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
Co-authored-by: lbb <mr@lbb00.com>
- fix(security): replace hardcoded /opt/cursor/logs with app_data_dir() - fix(security): add SSRF validation for proxy /stream and /warm endpoints - perf(logger): replace blocking sync Mutex+file I/O with async mpsc channel writer thread - refactor: remove excessive runtime logging in orchestrator, proxy, and commands - refactor: extract useDualPlaybackEngine hook from VideoPlayer (SRP) - refactor: split loadChannelInSlot into loadHlsSlot/loadMpegtsSlot/loadNativeSlot - refactor: replace magic numbers with named constants Amp-Thread-ID: https://ampcode.com/threads/T-019cd3cb-257d-77fc-bda5-bbaf67c96654 Co-authored-by: Amp <amp@ampcode.com>
- Add player.standbyEnabled setting with default value false - Add resolver function resolveStandbyEnabled() - Add toggle control in playback settings - Conditionally load standby slot based on setting - Add translations: Fast Channel Change / 快速换台 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8cb-6f2f-711b-8f4d-146bdd937388 Co-authored-by: Amp <amp@ampcode.com>
- Log neighbor warm plan with predicted and warm target channels - Log user channel switches with direction - Log channel loading to standby slots with prewarm flag - Log slot ready status when stream connects - Log slot activation with channel info - Log slot destruction - Log reasons when preloading is skipped Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
- Slot 0: prev channel (n-1) - Slot 1: active channel (n) - always displayed - Slot 2: next channel (n+1) Benefits: - Preload both adjacent channels for faster switching in both directions - Auto-cleanup after 30s inactivity (user not switching channels) - Single active slot simplifies playback logic - Better console logging for 3-slot management Changes: - PlayerSlot type: 0 | 1 | 2 (prev/active/next) - 3 video elements: prevVideoRef, activeVideoRef, nextVideoRef - Separate prev/next slot helpers instead of toggle - Inactivity timer clears unused slots after 30s - Updated tests to match 3-slot architecture Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
前端槽位清理时间（2500ms）现在与发送给后端的预热意图 TTL 保持一致。 确保前后端的资源管理同步： - 后端 TTL 过期后停止预热 - 前端 TTL 过期后清理槽位 - 避免资源不同步或浪费 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
- 槽位 TTL: 60s (1min) - 用户一分钟内的切台都能秒启动 - 后端预热 TTL: 2.5s - 后端及时释放用不到的预热资源 避免槽位占用过长时间，同时给用户充足的响应时间 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
'Dual' 已过时 - 现在支持 3 个槽位 + 双向预加载： - 槽位 0: 上一频道 (n-1) - 槽位 1: 当前频道 (n) - 槽位 2: 下一频道 (n+1) 更准确的命名反映了实际的架构 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
强调行为而非数量： - 预加载邻频道（prev/next） - 无缝快速切台 - 1分钟内的任意切台都是秒启动 比 'TripleSlot' 更清晰地表达了核心能力 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
删除后端预热决策层： - ❌ prewarm_submit_intents - ❌ prewarm_report_primary - ❌ prewarm_clear_source 改为前端单独管理： - 预加载完全由 standbyEnabled 设置控制 - 3 个槽位生命周期由前端管理 - 60秒 TTL 自动清理 简化了架构：只有一层预加载逻辑，避免前后端冗余 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
完整的命名重构，强调行为而非实现细节： 前端： - useStandbyPlayback → useInstantChannelSwitch - StandbyPlaybackEngine → InstantChannelSwitchEngine - [Standby] logs → [InstantSwitch] logs - STANDBY_SLOT_TTL_MS → INSTANT_SWITCH_SLOT_TTL_MS Settings： - standbyEnabled → instantSwitchEnabled - STANDBY_ENABLED_SETTING_KEY → INSTANT_SWITCH_ENABLED_SETTING_KEY - player.standbyEnabled → player.instantSwitchEnabled 翻译： - en-US: 'Fast Channel Change' → 'Instant Switch' - zh-CN: '快速换台' → '即时切台' Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com>
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* perf: reduce channel switch latency Co-authored-by: lbb <mr@lbb00.com> * perf: preload channel switch and keep speed indicator visible Co-authored-by: lbb <mr@lbb00.com> * perf: add dual-player hot switch and proxy warm cache Co-authored-by: lbb <mr@lbb00.com> * perf: reuse standby slot on rapid channel toggles Co-authored-by: lbb <mr@lbb00.com> * perf: wait for standby readiness before swap Co-authored-by: lbb <mr@lbb00.com> * perf: prewarm standby slot for predicted next channel Co-authored-by: lbb <mr@lbb00.com> * perf: simplify channel prewarm switch flow Co-authored-by: lbb <mr@lbb00.com> * refactor: split player switch core and add unit tests Co-authored-by: lbb <mr@lbb00.com> * feat: add rust resource prewarm orchestrator Co-authored-by: lbb <mr@lbb00.com> * fix(player): keep bottom info visible after overlay hide Co-authored-by: lbb <mr@lbb00.com> * feat: add standby runtime logging and hit probes Co-authored-by: lbb <mr@lbb00.com> * feat(debug): add switch latency and hit rate panel Co-authored-by: lbb <mr@lbb00.com> * revert(debug): remove switch metrics panel Co-authored-by: lbb <mr@lbb00.com> * refactor: fix security, perf, and architecture issues - fix(security): replace hardcoded /opt/cursor/logs with app_data_dir() - fix(security): add SSRF validation for proxy /stream and /warm endpoints - perf(logger): replace blocking sync Mutex+file I/O with async mpsc channel writer thread - refactor: remove excessive runtime logging in orchestrator, proxy, and commands - refactor: extract useDualPlaybackEngine hook from VideoPlayer (SRP) - refactor: split loadChannelInSlot into loadHlsSlot/loadMpegtsSlot/loadNativeSlot - refactor: replace magic numbers with named constants Amp-Thread-ID: https://ampcode.com/threads/T-019cd3cb-257d-77fc-bda5-bbaf67c96654 Co-authored-by: Amp <amp@ampcode.com> * feat: Add Fast Channel Change (FCC) configuration toggle - Add player.standbyEnabled setting with default value false - Add resolver function resolveStandbyEnabled() - Add toggle control in playback settings - Conditionally load standby slot based on setting - Add translations: Fast Channel Change / 快速换台 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8cb-6f2f-711b-8f4d-146bdd937388 Co-authored-by: Amp <amp@ampcode.com> * feat: add console logging for standby preloading details - Log neighbor warm plan with predicted and warm target channels - Log user channel switches with direction - Log channel loading to standby slots with prewarm flag - Log slot ready status when stream connects - Log slot activation with channel info - Log slot destruction - Log reasons when preloading is skipped Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * feat: expand to 3-slot playback engine with auto-cleanup - Slot 0: prev channel (n-1) - Slot 1: active channel (n) - always displayed - Slot 2: next channel (n+1) Benefits: - Preload both adjacent channels for faster switching in both directions - Auto-cleanup after 30s inactivity (user not switching channels) - Single active slot simplifies playback logic - Better console logging for 3-slot management Changes: - PlayerSlot type: 0 | 1 | 2 (prev/active/next) - 3 video elements: prevVideoRef, activeVideoRef, nextVideoRef - Separate prev/next slot helpers instead of toggle - Inactivity timer clears unused slots after 30s - Updated tests to match 3-slot architecture Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * fix: sync standby slot TTL with backend prewarm TTL 前端槽位清理时间（2500ms）现在与发送给后端的预热意图 TTL 保持一致。 确保前后端的资源管理同步： - 后端 TTL 过期后停止预热 - 前端 TTL 过期后清理槽位 - 避免资源不同步或浪费 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * fix: separate slot TTL and backend prewarm TTL - 槽位 TTL: 60s (1min) - 用户一分钟内的切台都能秒启动 - 后端预热 TTL: 2.5s - 后端及时释放用不到的预热资源 避免槽位占用过长时间，同时给用户充足的响应时间 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * refactor: rename useDualPlaybackEngine to useTripleSlotPlaybackEngine 'Dual' 已过时 - 现在支持 3 个槽位 + 双向预加载： - 槽位 0: 上一频道 (n-1) - 槽位 1: 当前频道 (n) - 槽位 2: 下一频道 (n+1) 更准确的命名反映了实际的架构 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * refactor: rename to useStandbyPlayback - behavior-driven naming 强调行为而非数量： - 预加载邻频道（prev/next） - 无缝快速切台 - 1分钟内的任意切台都是秒启动 比 'TripleSlot' 更清晰地表达了核心能力 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * refactor: remove backend prewarm API, all preloading now frontend-driven 删除后端预热决策层： - ❌ prewarm_submit_intents - ❌ prewarm_report_primary - ❌ prewarm_clear_source 改为前端单独管理： - 预加载完全由 standbyEnabled 设置控制 - 3 个槽位生命周期由前端管理 - 60秒 TTL 自动清理 简化了架构：只有一层预加载逻辑，避免前后端冗余 Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * refactor: rename standby to instant switch - better naming 完整的命名重构，强调行为而非实现细节： 前端： - useStandbyPlayback → useInstantChannelSwitch - StandbyPlaybackEngine → InstantChannelSwitchEngine - [Standby] logs → [InstantSwitch] logs - STANDBY_SLOT_TTL_MS → INSTANT_SWITCH_SLOT_TTL_MS Settings： - standbyEnabled → instantSwitchEnabled - STANDBY_ENABLED_SETTING_KEY → INSTANT_SWITCH_ENABLED_SETTING_KEY - player.standbyEnabled → player.instantSwitchEnabled 翻译： - en-US: 'Fast Channel Change' → 'Instant Switch' - zh-CN: '快速换台' → '即时切台' Amp-Thread-ID: https://ampcode.com/threads/T-019cd8d6-f00e-7148-a2e4-0d93420aa95e Co-authored-by: Amp <amp@ampcode.com> * Fix player slot switching and tests * Fix player slot switch robustness and proxy safety * Fix desktop nav state and startup view --------- Co-authored-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Amp <amp@ampcode.com>
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