fix(stream): hold 120Hz without touch on HarmonyOS 7 - #133
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HarmonyOS 7's frame-rate governor (HGM) drops the panel back to 60Hz
when no touch input is received, and one-shot SetExpectedFrameRateRange
hints no longer hold. An audit against the official docs showed our
previous three-layer requests were never fully compliant:
- NativeVSync hint was dead code (the instance never called RequestFrame)
- XComponent range was set without the required onFrame callback pair
- min=max=expected=120 is an official anti-pattern
- the only compliant, actively-running requester (displaySync) was a
fallback-only path
Replace the one-shot hints with a continuously-active keepalive:
- DisplaySoloist (API 12+, official game/self-draw channel) with an
empty frame callback continuously requesting vsync at the stream fps
- XComponent SetExpectedFrameRateRange now paired with
RegisterOnFrameCallback (API 20 NodeHandle path, API 11 fallback);
the API 20 path now falls back on failure instead of returning early
- NativeWindow SetFrameRateRange uses {0,120,fps} with strategy EXACT
- RefreshFrameRateHints re-asserts hints every 2s from SubmitFrame and
on surface bind / fps change (device experiments showed hint state
gets re-adopted after focus/visibility changes such as menu toggling)
- full reset on stream end / page dispose: soloist stop+destroy, onFrame
unregister, 60fps restore, so no high-refresh request lingers
Also add moonlight-common-c RemoteTextContextStream.c to CMakeLists
(missed when the submodule pointer moved to 31a2a45; without it the
nativelib link fails) and bump that pointer accordingly.
Verified: full native build of libmoonlight_nativelib.so against the
API 26 SDK toolchain. HarmonyOS 7 device A/B verification pending.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthrough本次变更将高帧率控制从 NativeVSync 切换为 DisplaySoloist 保活，并补充 XComponent 逐帧回调、NativeWindow hint 重申、NAPI 导出及串流生命周期复位逻辑。 Changes帧率保活
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to No concrete merge-blocking risk was identified in the reviewed changes. 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
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Inline comments:
In `@docs/VIDEO_DECODE_RENDER_ARCHITECTURE.md`:
- Line 165: 调整架构图中的控制关系：不要将 REFRESH 直接连接到 XCRATE2；为 ArkTS 生命周期单独建立节点，并分别连接
launchStream 的 XComponent 帧率设置路径和 prepareStreamEndUiImmediate 的复位路径，同时保留
RefreshFrameRateHints 仅表示 NativeWindow 帧率 hint 与 DisplaySoloist 维护。
In `@entry/src/main/ets/pages/StreamPage.ets`:
- Around line 785-788: 将 launchStream 中现有的完整帧率复位逻辑提取为幂等方法，同时调用
setFrameRateKeepAlive(false) 和 setXComponentFrameRate(frameNode,
60)。在启动失败、aboutToDisappear 页面销毁及正常结束路径统一调用该方法，确保 DisplaySoloist 与 XComponent
的帧率请求都被清理。
- Around line 1440-1444: 在 StreamPage 的启动流程中增加页面销毁/取消状态：由 aboutToDisappear()
先设置取消标记，并让 startStreaming()/launchStream() 在设置高刷请求前检查该标记；取消后不得调用
MoonBridge.setXComponentFrameRate() 或
MoonBridge.setFrameRateKeepAlive(true)，同时保持现有销毁时的保活关闭逻辑。
In `@nativelib/src/main/cpp/moonlight_bridge.cpp`:
- Around line 2383-2388: Update the frame-rate setter failure path around
onFrameRegistered and the new/old registration callbacks so that, when no setter
succeeds, it unregisters using the matching path: g_pfnXCUnregisterOnFrameNew
for the new node registration or g_pfnXCUnregisterOnFrameOld for the old XC
registration. Track the actual registration path, treat the old path as
successful only when g_pfnXCRegisterOnFrameOld returns 0, and also clean up when
the old path is unavailable or g_pfnGetNativeXC returns null.
In `@nativelib/src/main/cpp/native_render.cpp`:
- Around line 408-410: Update the failure branches for SetExpectedFrameRateRange
and OH_DisplaySoloist_Start to destroy the existing displaySoloist_ instance and
reset displaySoloist_ to null before returning, allowing later refreshes to
recreate and retry high-frame-rate keepalive.
- Around line 551-554: Synchronize all window_ access in SetNativeWindow and
RefreshFrameRateHints using frameRateMutex_, including assignment, clearing,
reading, and the OH_NativeWindow_SetFrameRateRange call. Ensure the
native-window operation uses a valid synchronized pointer, while restructuring
the flow to avoid holding the mutex across any reentrant RefreshFrameRateHints
call.
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docs/VIDEO_DECODE_RENDER_ARCHITECTURE.mdentry/src/main/ets/pages/StreamPage.etsentry/src/main/ets/service/streaming/MoonBridge.etsnativelib/src/main/cpp/CMakeLists.txtnativelib/src/main/cpp/moonlight-common-cnativelib/src/main/cpp/moonlight_bridge.cppnativelib/src/main/cpp/moonlight_bridge.hnativelib/src/main/cpp/napi_init.cppnativelib/src/main/cpp/native_render.cppnativelib/src/main/cpp/native_render.h
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- native_render: guard window_ writes with frameRateMutex_ (decode-thread RefreshFrameRateHints reads it under the lock; SetNativeWindow wrote it unlocked) and drop the unlocked read path in ConfigureNativeWindow - native_render: destroy a failed DisplaySoloist instance so the next RefreshFrameRateHints retries instead of skipping a dead handle - moonlight_bridge: unregister the onFrame callback when every frame-rate set path fails, avoiding an orphaned callback - StreamPage: extract idempotent resetStreamFrameHints() and call it on start failure as well as stream end / page dispose; bail out of launchStream when the page was disposed while the async start chain was still pending (pageDisposed flag) - docs: fix mermaid control flow (ArkTS lifecycle as its own node) Build verified with assembleHap against the API 26 SDK. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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背景
HarmonyOS 7 上 120fps 串流只要不触摸屏幕，面板刷新率就被系统控帧（HGM）降回 60Hz（触摸可临时恢复）。对照官方文档逐层审计后发现，现有"三层帧率请求"没有一层按官方姿势完整接入，鸿蒙 6.x 的宽松策略掩盖了这些问题：
OH_NativeVSync_RequestFrame，对它设SetExpectedFrameRateRange不产生任何有效的控帧信号SetExpectedFrameRateRange与RegisterOnFrameCallback成对使用，之前只设了 range；且 API 20 路径不看返回值直接 return，失败时静默丢失且不走回退min=max=expected=120（官方 LTPO 文档明文不建议）修改
用"持续活跃的信号"替代"一次性 hint"：
setFrameRateKeepAlivefps ≤ 60时复位并注销回调{min:0, max:120, expected:fps}协商区间；NativeWindow strategy 改 EXACT（上游 Fix 120Hz keepalive in smart framerate mode #35 同款，语义无官方文档）RefreshFrameRateHints从SubmitFrame每 2 秒重申各层 hint，Surface 绑定/帧率变化时 force 重申——真机实验发现调出菜单再返回可恢复并保持 120Hz，说明 hint 状态会被焦点/可见性变化重新采信，持续重申把这一效应变成确定性机制prepareStreamEndUiImmediate）与页面销毁（aboutToDisappear兜底）停用保活、注销回调、恢复 60fps 默认，避免高刷请求残留耗电moonlight-common-c指针随本 PR 提升（其 31a2a45 新增的RemoteTextContextStream.c已补进 CMakeLists，否则链接失败）验证
libmoonlight_nativelib.so用 API 26 SDK 工具链独立编译链接通过（同时验证对 API 26 头文件兼容）hilog | grep -E "DisplaySoloist|FrameRateRange"确认各层 ret=0；hidumper -s RenderService -a "screen"看 activeModeReviewer 须知
OH_NativeWindow_SetFrameRateRange为非公开 API（不在 NDK 头文件中，dlsym 加载），strategy参数语义无官方文档，EXACT 取自上游 Fix 120Hz keepalive in smart framerate mode #35 的用法；若真机无效可回退 DEFAULT 对照Summary by CodeRabbit
新功能
改进
文档