services/surfaceflinger/SurfaceFlingerConsumer.cpp - third_party/android/platform/frameworks/native - Git at Google

 /*
  * Copyright (C) 2012 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 //#define LOG_NDEBUG 0

 #include "SurfaceFlingerConsumer.h"
 #include "Layer.h"

 #include <private/gui/SyncFeatures.h>

 #include <gui/BufferItem.h>
 #include <gui/BufferQueue.h>

 #include <utils/Errors.h>
 #include <utils/NativeHandle.h>
 #include <utils/Trace.h>

 namespace android {

 // ---------------------------------------------------------------------------

 status_t SurfaceFlingerConsumer::updateTexImage(BufferRejecter* rejecter,
         const DispSync& dispSync, bool* autoRefresh, bool* queuedBuffer,
         uint64_t maxFrameNumber)
 {
     ATRACE_CALL();
     ALOGV("updateTexImage");
     Mutex::Autolock lock(mMutex);

     if (mAbandoned) {
         ALOGE("updateTexImage: GLConsumer is abandoned!");
         return NO_INIT;
     }

     // Make sure the EGL state is the same as in previous calls.
     status_t err = checkAndUpdateEglStateLocked();
     if (err != NO_ERROR) {
         return err;
     }

     BufferItem item;

     // Acquire the next buffer.
     // In asynchronous mode the list is guaranteed to be one buffer
     // deep, while in synchronous mode we use the oldest buffer.
     err = acquireBufferLocked(&item, computeExpectedPresent(dispSync),
             maxFrameNumber);
     if (err != NO_ERROR) {
         if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
             err = NO_ERROR;
         } else if (err == BufferQueue::PRESENT_LATER) {
             // return the error, without logging
         } else {
             ALOGE("updateTexImage: acquire failed: %s (%d)",
                 strerror(-err), err);
         }
         return err;
     }

     if (autoRefresh) {
         *autoRefresh = item.mAutoRefresh;
     }

     if (queuedBuffer) {
         *queuedBuffer = item.mQueuedBuffer;
     }

     // We call the rejecter here, in case the caller has a reason to
     // not accept this buffer.  This is used by SurfaceFlinger to
     // reject buffers which have the wrong size
     int slot = item.mSlot;
     if (rejecter && rejecter->reject(mSlots[slot].mGraphicBuffer, item)) {
         releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer, EGL_NO_SYNC_KHR);
         return BUFFER_REJECTED;
     }

     // Release the previous buffer.
 #ifdef USE_HWC2
     err = updateAndReleaseLocked(item, &mPendingRelease);
 #else
     err = updateAndReleaseLocked(item);
 #endif
     if (err != NO_ERROR) {
         return err;
     }

     if (!SyncFeatures::getInstance().useNativeFenceSync()) {
         // Bind the new buffer to the GL texture.
         //
         // Older devices require the "implicit" synchronization provided
         // by glEGLImageTargetTexture2DOES, which this method calls.  Newer
         // devices will either call this in Layer::onDraw, or (if it's not
         // a GL-composited layer) not at all.
         err = bindTextureImageLocked();
     }

     return err;
 }

 status_t SurfaceFlingerConsumer::bindTextureImage()
 {
     Mutex::Autolock lock(mMutex);

     return bindTextureImageLocked();
 }

 status_t SurfaceFlingerConsumer::acquireBufferLocked(BufferItem* item,
         nsecs_t presentWhen, uint64_t maxFrameNumber) {
     status_t result = GLConsumer::acquireBufferLocked(item, presentWhen,
             maxFrameNumber);
     if (result == NO_ERROR) {
         mTransformToDisplayInverse = item->mTransformToDisplayInverse;
         mSurfaceDamage = item->mSurfaceDamage;
     }
     return result;
 }

 bool SurfaceFlingerConsumer::getTransformToDisplayInverse() const {
     Mutex::Autolock lock(mMutex);
     return mTransformToDisplayInverse;
 }

 const Region& SurfaceFlingerConsumer::getSurfaceDamage() const {
     return mSurfaceDamage;
 }

 sp<NativeHandle> SurfaceFlingerConsumer::getSidebandStream() const {
     sp<NativeHandle> stream;
     mConsumer->getSidebandStream(&stream);
     return stream;
 }

 // 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
 //    + current display refresh rate * HWC latency
 //    + a little extra padding
 //
 // Buffer producers are expected to set their desired presentation time
 // based on choreographer time stamps, which (coming from vsync events)
 // will be slightly later then the actual-present timing.  If we get a
 // desired-present time that is unintentionally a hair after the next
 // vsync, we'll hold the frame when we really want to display it.  We
 // need to take the offset between actual-present and reported-vsync
 // into account.
 //
 // If the system is configured without a DispSync phase offset for the app,
 // we also want to throw in a bit of padding to avoid edge cases where we
 // just barely miss.  We want to do it here, not in every app.  A major
 // source of trouble is the app's use of the display's ideal refresh time
 // (via Display.getRefreshRate()), which could be off of the actual refresh
 // by a few percent, with the error multiplied by the number of frames
 // between now and when the buffer should be displayed.
 //
 // If the refresh reported to the app has a phase offset, we shouldn't need
 // to tweak anything here.
 nsecs_t SurfaceFlingerConsumer::computeExpectedPresent(const DispSync& dispSync)
 {
     // The HWC doesn't currently have a way to report additional latency.
     // Assume that whatever we submit now will appear right after the flip.
     // For a smart panel this might be 1.  This is expressed in frames,
     // rather than time, because we expect to have a constant frame delay
     // regardless of the refresh rate.
     const uint32_t hwcLatency = 0;

     // Ask DispSync when the next refresh will be (CLOCK_MONOTONIC).
     const nsecs_t nextRefresh = dispSync.computeNextRefresh(hwcLatency);

     // The DispSync time is already adjusted for the difference between
     // vsync and reported-vsync (SurfaceFlinger::dispSyncPresentTimeOffset), so
     // we don't need to factor that in here.  Pad a little to avoid
     // weird effects if apps might be requesting times right on the edge.
     nsecs_t extraPadding = 0;
     if (SurfaceFlinger::vsyncPhaseOffsetNs == 0) {
         extraPadding = 1000000;        // 1ms (6% of 60Hz)
     }

     return nextRefresh + extraPadding;
 }

 sp<Fence> SurfaceFlingerConsumer::getPrevFinalReleaseFence() const {
     Mutex::Autolock lock(mMutex);
     return ConsumerBase::mPrevFinalReleaseFence;
 }

 #ifdef USE_HWC2
 void SurfaceFlingerConsumer::setReleaseFence(const sp<Fence>& fence)
 {
     if (!mPendingRelease.isPending) {
         GLConsumer::setReleaseFence(fence);
         return;
     }
     auto currentTexture = mPendingRelease.currentTexture;
     if (fence->isValid() &&
             currentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
         status_t result = addReleaseFence(currentTexture,
                 mPendingRelease.graphicBuffer, fence);
         ALOGE_IF(result != NO_ERROR, "setReleaseFence: failed to add the"
                 " fence: %s (%d)", strerror(-result), result);
     }
 }

 bool SurfaceFlingerConsumer::releasePendingBuffer()
 {
     if (!mPendingRelease.isPending) {
         ALOGV("Pending buffer already released");
         return false;
     }
     ALOGV("Releasing pending buffer");
     Mutex::Autolock lock(mMutex);
     status_t result = releaseBufferLocked(mPendingRelease.currentTexture,
             mPendingRelease.graphicBuffer, mPendingRelease.display,
             mPendingRelease.fence);
     ALOGE_IF(result < NO_ERROR, "releasePendingBuffer failed: %s (%d)",
             strerror(-result), result);
     mPendingRelease = PendingRelease();
     return true;
 }
 #endif

 void SurfaceFlingerConsumer::setContentsChangedListener(
         const wp<ContentsChangedListener>& listener) {
     setFrameAvailableListener(listener);
     Mutex::Autolock lock(mMutex);
     mContentsChangedListener = listener;
 }

 void SurfaceFlingerConsumer::onSidebandStreamChanged() {
     FrameAvailableListener* unsafeFrameAvailableListener = nullptr;
     {
         Mutex::Autolock lock(mFrameAvailableMutex);
         unsafeFrameAvailableListener = mFrameAvailableListener.unsafe_get();
     }
     sp<ContentsChangedListener> listener;
     {   // scope for the lock
         Mutex::Autolock lock(mMutex);
         ALOG_ASSERT(unsafeFrameAvailableListener == mContentsChangedListener.unsafe_get());
         listener = mContentsChangedListener.promote();
     }

     if (listener != NULL) {
         listener->onSidebandStreamChanged();
     }
 }

 void SurfaceFlingerConsumer::onDisconnect() {
     sp<Layer> l = mLayer.promote();
     if (l.get()) {
         l->onDisconnect();
     }
 }

 void SurfaceFlingerConsumer::addAndGetFrameTimestamps(
         const NewFrameEventsEntry* newTimestamps,
         FrameEventHistoryDelta *outDelta) {
     sp<Layer> l = mLayer.promote();
     if (l.get()) {
         l->addAndGetFrameTimestamps(newTimestamps, outDelta);
     }
 }

 // ---------------------------------------------------------------------------
 }; // namespace android
	/*
	* Copyright (C) 2012 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#define ATRACE_TAG ATRACE_TAG_GRAPHICS
	//#define LOG_NDEBUG 0

	#include "SurfaceFlingerConsumer.h"
	#include "Layer.h"

	#include <private/gui/SyncFeatures.h>

	#include <gui/BufferItem.h>
	#include <gui/BufferQueue.h>

	#include <utils/Errors.h>
	#include <utils/NativeHandle.h>
	#include <utils/Trace.h>

	namespace android {

	// ---------------------------------------------------------------------------

	status_t SurfaceFlingerConsumer::updateTexImage(BufferRejecter* rejecter,
	const DispSync& dispSync, bool* autoRefresh, bool* queuedBuffer,
	uint64_t maxFrameNumber)
	{
	ATRACE_CALL();
	ALOGV("updateTexImage");
	Mutex::Autolock lock(mMutex);

	if (mAbandoned) {
	ALOGE("updateTexImage: GLConsumer is abandoned!");
	return NO_INIT;
	}

	// Make sure the EGL state is the same as in previous calls.
	status_t err = checkAndUpdateEglStateLocked();
	if (err != NO_ERROR) {
	return err;
	}

	BufferItem item;

	// Acquire the next buffer.
	// In asynchronous mode the list is guaranteed to be one buffer
	// deep, while in synchronous mode we use the oldest buffer.
	err = acquireBufferLocked(&item, computeExpectedPresent(dispSync),
	maxFrameNumber);
	if (err != NO_ERROR) {
	if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
	err = NO_ERROR;
	} else if (err == BufferQueue::PRESENT_LATER) {
	// return the error, without logging
	} else {
	ALOGE("updateTexImage: acquire failed: %s (%d)",
	strerror(-err), err);
	}
	return err;
	}

	if (autoRefresh) {
	*autoRefresh = item.mAutoRefresh;
	}

	if (queuedBuffer) {
	*queuedBuffer = item.mQueuedBuffer;
	}

	// We call the rejecter here, in case the caller has a reason to
	// not accept this buffer. This is used by SurfaceFlinger to
	// reject buffers which have the wrong size
	int slot = item.mSlot;
	if (rejecter && rejecter->reject(mSlots[slot].mGraphicBuffer, item)) {
	releaseBufferLocked(slot, mSlots[slot].mGraphicBuffer, EGL_NO_SYNC_KHR);
	return BUFFER_REJECTED;
	}

	// Release the previous buffer.
	#ifdef USE_HWC2
	err = updateAndReleaseLocked(item, &mPendingRelease);
	#else
	err = updateAndReleaseLocked(item);
	#endif
	if (err != NO_ERROR) {
	return err;
	}

	if (!SyncFeatures::getInstance().useNativeFenceSync()) {
	// Bind the new buffer to the GL texture.
	//
	// Older devices require the "implicit" synchronization provided
	// by glEGLImageTargetTexture2DOES, which this method calls. Newer
	// devices will either call this in Layer::onDraw, or (if it's not
	// a GL-composited layer) not at all.
	err = bindTextureImageLocked();
	}

	return err;
	}

	status_t SurfaceFlingerConsumer::bindTextureImage()
	{
	Mutex::Autolock lock(mMutex);

	return bindTextureImageLocked();
	}

	status_t SurfaceFlingerConsumer::acquireBufferLocked(BufferItem* item,
	nsecs_t presentWhen, uint64_t maxFrameNumber) {
	status_t result = GLConsumer::acquireBufferLocked(item, presentWhen,
	maxFrameNumber);
	if (result == NO_ERROR) {
	mTransformToDisplayInverse = item->mTransformToDisplayInverse;
	mSurfaceDamage = item->mSurfaceDamage;
	}
	return result;
	}

	bool SurfaceFlingerConsumer::getTransformToDisplayInverse() const {
	Mutex::Autolock lock(mMutex);
	return mTransformToDisplayInverse;
	}

	const Region& SurfaceFlingerConsumer::getSurfaceDamage() const {
	return mSurfaceDamage;
	}

	sp<NativeHandle> SurfaceFlingerConsumer::getSidebandStream() const {
	sp<NativeHandle> stream;
	mConsumer->getSidebandStream(&stream);
	return stream;
	}

	// 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
	// + current display refresh rate * HWC latency
	// + a little extra padding
	//
	// Buffer producers are expected to set their desired presentation time
	// based on choreographer time stamps, which (coming from vsync events)
	// will be slightly later then the actual-present timing. If we get a
	// desired-present time that is unintentionally a hair after the next
	// vsync, we'll hold the frame when we really want to display it. We
	// need to take the offset between actual-present and reported-vsync
	// into account.
	//
	// If the system is configured without a DispSync phase offset for the app,
	// we also want to throw in a bit of padding to avoid edge cases where we
	// just barely miss. We want to do it here, not in every app. A major
	// source of trouble is the app's use of the display's ideal refresh time
	// (via Display.getRefreshRate()), which could be off of the actual refresh
	// by a few percent, with the error multiplied by the number of frames
	// between now and when the buffer should be displayed.
	//
	// If the refresh reported to the app has a phase offset, we shouldn't need
	// to tweak anything here.
	nsecs_t SurfaceFlingerConsumer::computeExpectedPresent(const DispSync& dispSync)
	{
	// The HWC doesn't currently have a way to report additional latency.
	// Assume that whatever we submit now will appear right after the flip.
	// For a smart panel this might be 1. This is expressed in frames,
	// rather than time, because we expect to have a constant frame delay
	// regardless of the refresh rate.
	const uint32_t hwcLatency = 0;

	// Ask DispSync when the next refresh will be (CLOCK_MONOTONIC).
	const nsecs_t nextRefresh = dispSync.computeNextRefresh(hwcLatency);

	// The DispSync time is already adjusted for the difference between
	// vsync and reported-vsync (SurfaceFlinger::dispSyncPresentTimeOffset), so
	// we don't need to factor that in here. Pad a little to avoid
	// weird effects if apps might be requesting times right on the edge.
	nsecs_t extraPadding = 0;
	if (SurfaceFlinger::vsyncPhaseOffsetNs == 0) {
	extraPadding = 1000000; // 1ms (6% of 60Hz)
	}

	return nextRefresh + extraPadding;
	}

	sp<Fence> SurfaceFlingerConsumer::getPrevFinalReleaseFence() const {
	Mutex::Autolock lock(mMutex);
	return ConsumerBase::mPrevFinalReleaseFence;
	}

	#ifdef USE_HWC2
	void SurfaceFlingerConsumer::setReleaseFence(const sp<Fence>& fence)
	{
	if (!mPendingRelease.isPending) {
	GLConsumer::setReleaseFence(fence);
	return;
	}
	auto currentTexture = mPendingRelease.currentTexture;
	if (fence->isValid() &&
	currentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
	status_t result = addReleaseFence(currentTexture,
	mPendingRelease.graphicBuffer, fence);
	ALOGE_IF(result != NO_ERROR, "setReleaseFence: failed to add the"
	" fence: %s (%d)", strerror(-result), result);
	}
	}

	bool SurfaceFlingerConsumer::releasePendingBuffer()
	{
	if (!mPendingRelease.isPending) {
	ALOGV("Pending buffer already released");
	return false;
	}
	ALOGV("Releasing pending buffer");
	Mutex::Autolock lock(mMutex);
	status_t result = releaseBufferLocked(mPendingRelease.currentTexture,
	mPendingRelease.graphicBuffer, mPendingRelease.display,
	mPendingRelease.fence);
	ALOGE_IF(result < NO_ERROR, "releasePendingBuffer failed: %s (%d)",
	strerror(-result), result);
	mPendingRelease = PendingRelease();
	return true;
	}
	#endif

	void SurfaceFlingerConsumer::setContentsChangedListener(
	const wp<ContentsChangedListener>& listener) {
	setFrameAvailableListener(listener);
	Mutex::Autolock lock(mMutex);
	mContentsChangedListener = listener;
	}

	void SurfaceFlingerConsumer::onSidebandStreamChanged() {
	FrameAvailableListener* unsafeFrameAvailableListener = nullptr;
	{
	Mutex::Autolock lock(mFrameAvailableMutex);
	unsafeFrameAvailableListener = mFrameAvailableListener.unsafe_get();
	}
	sp<ContentsChangedListener> listener;
	{ // scope for the lock
	Mutex::Autolock lock(mMutex);
	ALOG_ASSERT(unsafeFrameAvailableListener == mContentsChangedListener.unsafe_get());
	listener = mContentsChangedListener.promote();
	}

	if (listener != NULL) {
	listener->onSidebandStreamChanged();
	}
	}

	void SurfaceFlingerConsumer::onDisconnect() {
	sp<Layer> l = mLayer.promote();
	if (l.get()) {
	l->onDisconnect();
	}
	}

	void SurfaceFlingerConsumer::addAndGetFrameTimestamps(
	const NewFrameEventsEntry* newTimestamps,
	FrameEventHistoryDelta *outDelta) {
	sp<Layer> l = mLayer.promote();
	if (l.get()) {
	l->addAndGetFrameTimestamps(newTimestamps, outDelta);
	}
	}

	// ---------------------------------------------------------------------------
	}; // namespace android