Allow for more flexible vsync-offsets
The issue with just one single sf early offset is that this may be
too early in case of steady rendering, i.e. when a
Wide-Color-Gamut window is on screen. Instead, we allow for
separate offsets in case we are in GL comp but the transaction
wasn't marked as early, and when the transaction is marked as
early.
In addition to that, we also allow the app-vsync to be adjusted
in these scenarios.
Bug: 110112323
Change-Id: I26d73b88b4e9e609ceedb604e8338452d9a89093
diff --git a/services/surfaceflinger/VSyncModulator.h b/services/surfaceflinger/VSyncModulator.h
index d526313..e071a59 100644
--- a/services/surfaceflinger/VSyncModulator.h
+++ b/services/surfaceflinger/VSyncModulator.h
@@ -36,6 +36,11 @@
public:
+ struct Offsets {
+ nsecs_t sf;
+ nsecs_t app;
+ };
+
enum TransactionStart {
EARLY,
NORMAL
@@ -43,21 +48,32 @@
// Sets the phase offsets
//
- // early: the phase offset when waking up early. May be the same as late, in which case we don't
- // shift offsets.
- // late: the regular sf phase offset.
- void setPhaseOffsets(nsecs_t early, nsecs_t late) {
- mEarlyPhaseOffset = early;
- mLatePhaseOffset = late;
- mPhaseOffset = late;
+ // sfEarly: The phase offset when waking up SF early, which happens when marking a transaction
+ // as early. May be the same as late, in which case we don't shift offsets.
+ // sfEarlyGl: Like sfEarly, but only if we used GL composition. If we use both GL composition
+ // and the transaction was marked as early, we'll use sfEarly.
+ // sfLate: The regular SF vsync phase offset.
+ // appEarly: Like sfEarly, but for the app-vsync
+ // appEarlyGl: Like sfEarlyGl, but for the app-vsync.
+ // appLate: The regular app vsync phase offset.
+ void setPhaseOffsets(Offsets early, Offsets earlyGl, Offsets late) {
+ mEarlyOffsets = early;
+ mEarlyGlOffsets = earlyGl;
+ mLateOffsets = late;
+ mOffsets = late;
}
- nsecs_t getEarlyPhaseOffset() const {
- return mEarlyPhaseOffset;
+ Offsets getEarlyOffsets() const {
+ return mEarlyOffsets;
}
- void setEventThread(EventThread* eventThread) {
- mEventThread = eventThread;
+ Offsets getEarlyGlOffsets() const {
+ return mEarlyGlOffsets;
+ }
+
+ void setEventThreads(EventThread* sfEventThread, EventThread* appEventThread) {
+ mSfEventThread = sfEventThread;
+ mAppEventThread = appEventThread;
}
void setTransactionStart(TransactionStart transactionStart) {
@@ -71,63 +87,70 @@
return;
}
mTransactionStart = transactionStart;
- updatePhaseOffsets();
+ updateOffsets();
}
void onTransactionHandled() {
if (mTransactionStart == TransactionStart::NORMAL) return;
mTransactionStart = TransactionStart::NORMAL;
- updatePhaseOffsets();
+ updateOffsets();
}
void onRefreshed(bool usedRenderEngine) {
- bool updatePhaseOffsetsNeeded = false;
+ bool updateOffsetsNeeded = false;
if (mRemainingEarlyFrameCount > 0) {
mRemainingEarlyFrameCount--;
- updatePhaseOffsetsNeeded = true;
+ updateOffsetsNeeded = true;
}
if (usedRenderEngine != mLastFrameUsedRenderEngine) {
mLastFrameUsedRenderEngine = usedRenderEngine;
- updatePhaseOffsetsNeeded = true;
+ updateOffsetsNeeded = true;
}
- if (updatePhaseOffsetsNeeded) {
- updatePhaseOffsets();
+ if (updateOffsetsNeeded) {
+ updateOffsets();
}
}
private:
- void updatePhaseOffsets() {
+ void updateOffsets() {
+ const Offsets desired = getOffsets();
+ const Offsets current = mOffsets;
- // Do not change phase offsets if disabled.
- if (mEarlyPhaseOffset == mLatePhaseOffset) return;
+ bool changed = false;
+ if (desired.sf != current.sf) {
+ mSfEventThread->setPhaseOffset(desired.sf);
+ changed = true;
+ }
+ if (desired.app != current.app) {
+ mAppEventThread->setPhaseOffset(desired.app);
+ changed = true;
+ }
- if (shouldUseEarlyOffset()) {
- if (mPhaseOffset != mEarlyPhaseOffset) {
- if (mEventThread) {
- mEventThread->setPhaseOffset(mEarlyPhaseOffset);
- }
- mPhaseOffset = mEarlyPhaseOffset;
- }
- } else {
- if (mPhaseOffset != mLatePhaseOffset) {
- if (mEventThread) {
- mEventThread->setPhaseOffset(mLatePhaseOffset);
- }
- mPhaseOffset = mLatePhaseOffset;
- }
+ if (changed) {
+ mOffsets = desired;
}
}
- bool shouldUseEarlyOffset() {
- return mTransactionStart == TransactionStart::EARLY || mLastFrameUsedRenderEngine
- || mRemainingEarlyFrameCount > 0;
+ Offsets getOffsets() {
+ if (mTransactionStart == TransactionStart::EARLY || mRemainingEarlyFrameCount > 0) {
+ return mEarlyOffsets;
+ } else if (mLastFrameUsedRenderEngine) {
+ return mEarlyGlOffsets;
+ } else {
+ return mLateOffsets;
+ }
}
- nsecs_t mLatePhaseOffset = 0;
- nsecs_t mEarlyPhaseOffset = 0;
- EventThread* mEventThread = nullptr;
- std::atomic<nsecs_t> mPhaseOffset = 0;
+ Offsets mLateOffsets;
+ Offsets mEarlyOffsets;
+ Offsets mEarlyGlOffsets;
+
+ EventThread* mSfEventThread = nullptr;
+ EventThread* mAppEventThread = nullptr;
+
+ std::atomic<Offsets> mOffsets;
+
std::atomic<TransactionStart> mTransactionStart = TransactionStart::NORMAL;
std::atomic<bool> mLastFrameUsedRenderEngine = false;
std::atomic<int> mRemainingEarlyFrameCount = 0;