Merge "SurfaceFlinger: Fix PTS on stale buffers" into mnc-dev

This commit is contained in:
Dan Stoza 2015-05-01 21:44:06 +00:00 committed by Android (Google) Code Review
commit ba9e1f4241
9 changed files with 100 additions and 4 deletions

View File

@ -148,6 +148,9 @@ public:
// Retrieve the sideband buffer stream, if any.
virtual sp<NativeHandle> getSidebandStream() const;
// See IGraphicBufferConsumer::setShadowQueueSize
virtual void setShadowQueueSize(size_t size);
// dump our state in a String
virtual void dump(String8& result, const char* prefix) const;

View File

@ -274,6 +274,13 @@ private:
// mBufferAge tracks the age of the contents of the most recently dequeued
// buffer as the number of frames that have elapsed since it was last queued
uint64_t mBufferAge;
// mConsumerHasShadowQueue determines if acquireBuffer should be more
// cautious about dropping buffers so that it always returns a buffer that
// is represented in the consumer's shadow queue.
bool mConsumerHasShadowQueue;
size_t mConsumerShadowQueueSize;
}; // class BufferQueueCore
} // namespace android

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@ -248,6 +248,11 @@ public:
// Retrieve the sideband buffer stream, if any.
virtual sp<NativeHandle> getSidebandStream() const = 0;
// setShadowQueueSize notifies the BufferQueue that the consumer is
// shadowing its queue and allows it to limit the number of buffers it is
// permitted to drop during acquire so as to not get out of sync.
virtual void setShadowQueueSize(size_t size) = 0;
// dump state into a string
virtual void dump(String8& result, const char* prefix) const = 0;

View File

@ -89,7 +89,20 @@ status_t BufferQueueConsumer::acquireBuffer(BufferItem* outBuffer,
// the timestamps are being auto-generated by Surface. If the app isn't
// generating timestamps explicitly, it probably doesn't want frames to
// be discarded based on them.
//
// If the consumer is shadowing our queue, we also make sure that we
// don't drop so many buffers that the consumer hasn't received the
// onFrameAvailable callback for the buffer it acquires. That is, we
// want the buffer we return to be in the consumer's shadow queue.
size_t droppableBuffers = mCore->mConsumerShadowQueueSize > 1 ?
mCore->mConsumerShadowQueueSize - 1 : 0;
while (mCore->mQueue.size() > 1 && !mCore->mQueue[0].mIsAutoTimestamp) {
if (mCore->mConsumerHasShadowQueue && droppableBuffers == 0) {
BQ_LOGV("acquireBuffer: no droppable buffers in consumer's"
" shadow queue, continuing");
break;
}
// If entry[1] is timely, drop entry[0] (and repeat). We apply an
// additional criterion here: we only drop the earlier buffer if our
// desiredPresent falls within +/- 1 second of the expected present.
@ -124,6 +137,7 @@ status_t BufferQueueConsumer::acquireBuffer(BufferItem* outBuffer,
}
mCore->mQueue.erase(front);
front = mCore->mQueue.begin();
--droppableBuffers;
}
// See if the front buffer is due
@ -537,6 +551,14 @@ sp<NativeHandle> BufferQueueConsumer::getSidebandStream() const {
return mCore->mSidebandStream;
}
void BufferQueueConsumer::setShadowQueueSize(size_t size) {
ATRACE_CALL();
BQ_LOGV("setShadowQueueSize: %zu", size);
Mutex::Autolock lock(mCore->mMutex);
mCore->mConsumerHasShadowQueue = true;
mCore->mConsumerShadowQueueSize = size;
}
void BufferQueueConsumer::dump(String8& result, const char* prefix) const {
mCore->dump(result, prefix);
}

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@ -71,7 +71,9 @@ BufferQueueCore::BufferQueueCore(const sp<IGraphicBufferAlloc>& allocator) :
mIsAllocating(false),
mIsAllocatingCondition(),
mAllowAllocation(true),
mBufferAge(0)
mBufferAge(0),
mConsumerHasShadowQueue(false),
mConsumerShadowQueueSize(0)
{
if (allocator == NULL) {
sp<ISurfaceComposer> composer(ComposerService::getComposerService());

View File

@ -52,6 +52,7 @@ enum {
SET_CONSUMER_USAGE_BITS,
SET_TRANSFORM_HINT,
GET_SIDEBAND_STREAM,
SET_SHADOW_QUEUE_SIZE,
DUMP,
};
@ -269,6 +270,17 @@ public:
return stream;
}
virtual void setShadowQueueSize(size_t size) {
Parcel data, reply;
data.writeInterfaceToken(IGraphicBufferConsumer::getInterfaceDescriptor());
data.writeInt64(static_cast<int64_t>(size));
status_t result = remote()->transact(SET_SHADOW_QUEUE_SIZE, data, &reply);
if (result != NO_ERROR) {
ALOGE("setShadowQueueSize failed (%d)", result);
return;
}
}
virtual void dump(String8& result, const char* prefix) const {
Parcel data, reply;
data.writeInterfaceToken(IGraphicBufferConsumer::getInterfaceDescriptor());
@ -423,6 +435,12 @@ status_t BnGraphicBufferConsumer::onTransact(
}
return NO_ERROR;
}
case SET_SHADOW_QUEUE_SIZE: {
CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
size_t size = static_cast<size_t>(data.readInt64());
setShadowQueueSize(size);
return NO_ERROR;
}
case DUMP: {
CHECK_INTERFACE(IGraphicBufferConsumer, data, reply);
String8 result = data.readString8();

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@ -127,6 +127,10 @@ void Layer::onFirstRef() {
mSurfaceFlingerConsumer->setContentsChangedListener(this);
mSurfaceFlingerConsumer->setName(mName);
// Set the shadow queue size to 0 to notify the BufferQueue that we are
// shadowing it
mSurfaceFlingerConsumer->setShadowQueueSize(0);
#ifdef TARGET_DISABLE_TRIPLE_BUFFERING
#warning "disabling triple buffering"
mSurfaceFlingerConsumer->setDefaultMaxBufferCount(2);
@ -164,9 +168,10 @@ void Layer::onFrameAvailable(const BufferItem& item) {
{ // Autolock scope
Mutex::Autolock lock(mQueueItemLock);
mQueueItems.push_back(item);
mSurfaceFlingerConsumer->setShadowQueueSize(mQueueItems.size());
android_atomic_inc(&mQueuedFrames);
}
android_atomic_inc(&mQueuedFrames);
mFlinger->signalLayerUpdate();
}
@ -1259,14 +1264,39 @@ Region Layer::latchBuffer(bool& recomputeVisibleRegions)
// layer update so we check again at the next opportunity.
mFlinger->signalLayerUpdate();
return outDirtyRegion;
} else if (updateResult == SurfaceFlingerConsumer::BUFFER_REJECTED) {
// If the buffer has been rejected, remove it from the shadow queue
// and return early
Mutex::Autolock lock(mQueueItemLock);
// Update the BufferQueue with the new shadow queue size after
// dropping this item
mQueueItems.removeAt(0);
mSurfaceFlingerConsumer->setShadowQueueSize(mQueueItems.size());
android_atomic_dec(&mQueuedFrames);
return outDirtyRegion;
}
// Remove this buffer from our internal queue tracker
{ // Autolock scope
auto currentFrameNumber = mSurfaceFlingerConsumer->getFrameNumber();
Mutex::Autolock lock(mQueueItemLock);
// Remove any stale buffers that have been dropped during
// updateTexImage
while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
mQueueItems.removeAt(0);
android_atomic_dec(&mQueuedFrames);
}
// Update the BufferQueue with our new shadow queue size, since we
// have removed at least one item
mQueueItems.removeAt(0);
mSurfaceFlingerConsumer->setShadowQueueSize(mQueueItems.size());
}
// Decrement the queued-frames count. Signal another event if we
// have more frames pending.
if (android_atomic_dec(&mQueuedFrames) > 1) {

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@ -74,7 +74,7 @@ status_t SurfaceFlingerConsumer::updateTexImage(BufferRejecter* rejecter,
int buf = item.mBuf;
if (rejecter && rejecter->reject(mSlots[buf].mGraphicBuffer, item)) {
releaseBufferLocked(buf, mSlots[buf].mGraphicBuffer, EGL_NO_SYNC_KHR);
return NO_ERROR;
return BUFFER_REJECTED;
}
// Release the previous buffer.
@ -125,6 +125,10 @@ sp<NativeHandle> SurfaceFlingerConsumer::getSidebandStream() const {
return mConsumer->getSidebandStream();
}
void SurfaceFlingerConsumer::setShadowQueueSize(size_t size) {
mConsumer->setShadowQueueSize(size);
}
// We need to determine the time when a buffer acquired now will be
// displayed. This can be calculated:
// time when previous buffer's actual-present fence was signaled

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@ -28,6 +28,8 @@ namespace android {
*/
class SurfaceFlingerConsumer : public GLConsumer {
public:
static const status_t BUFFER_REJECTED = UNKNOWN_ERROR + 8;
struct ContentsChangedListener: public FrameAvailableListener {
virtual void onSidebandStreamChanged() = 0;
};
@ -68,6 +70,9 @@ public:
sp<NativeHandle> getSidebandStream() const;
// See IGraphicBufferConsumer::setShadowQueueSize
void setShadowQueueSize(size_t size);
nsecs_t computeExpectedPresent(const DispSync& dispSync);
private: