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/*
* Copyright (C) 2019 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.
*/
#undef LOG_TAG
#define LOG_TAG "BLASTBufferQueue"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include <gui/BLASTBufferQueue.h>
#include <gui/BufferItemConsumer.h>
#include <gui/GLConsumer.h>
#include <utils/Trace.h>
#include <chrono>
using namespace std::chrono_literals;
namespace android {
BLASTBufferQueue::BLASTBufferQueue(const sp<SurfaceControl>& surface, int width, int height)
: mSurfaceControl(surface),
mWidth(width),
mHeight(height),
mNextTransaction(nullptr) {
BufferQueue::createBufferQueue(&mProducer, &mConsumer);
mConsumer->setMaxAcquiredBufferCount(MAX_ACQUIRED_BUFFERS);
mBufferItemConsumer =
new BufferItemConsumer(mConsumer, AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER, 1, true);
static int32_t id = 0;
auto name = std::string("BLAST Consumer") + std::to_string(id);
id++;
mBufferItemConsumer->setName(String8(name.c_str()));
mBufferItemConsumer->setFrameAvailableListener(this);
mBufferItemConsumer->setBufferFreedListener(this);
mBufferItemConsumer->setDefaultBufferSize(mWidth, mHeight);
mBufferItemConsumer->setDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888);
mBufferItemConsumer->setTransformHint(mSurfaceControl->getTransformHint());
mNumAcquired = 0;
mNumFrameAvailable = 0;
mPendingReleaseItem.item = BufferItem();
mPendingReleaseItem.releaseFence = nullptr;
}
void BLASTBufferQueue::update(const sp<SurfaceControl>& surface, int width, int height) {
std::unique_lock _lock{mMutex};
mSurfaceControl = surface;
mWidth = width;
mHeight = height;
mBufferItemConsumer->setDefaultBufferSize(mWidth, mHeight);
mBufferItemConsumer->setTransformHint(mSurfaceControl->getTransformHint());
}
static void transactionCallbackThunk(void* context, nsecs_t latchTime,
const sp<Fence>& presentFence,
const std::vector<SurfaceControlStats>& stats) {
if (context == nullptr) {
return;
}
BLASTBufferQueue* bq = static_cast<BLASTBufferQueue*>(context);
bq->transactionCallback(latchTime, presentFence, stats);
}
void BLASTBufferQueue::transactionCallback(nsecs_t /*latchTime*/, const sp<Fence>& /*presentFence*/,
const std::vector<SurfaceControlStats>& stats) {
std::unique_lock _lock{mMutex};
ATRACE_CALL();
if (mPendingReleaseItem.item.mGraphicBuffer != nullptr) {
if (stats.size() > 0) {
mPendingReleaseItem.releaseFence = stats[0].previousReleaseFence;
mTransformHint = stats[0].transformHint;
} else {
ALOGE("Warning: no SurfaceControlStats returned in BLASTBufferQueue callback");
mPendingReleaseItem.releaseFence = nullptr;
}
mBufferItemConsumer->releaseBuffer(mPendingReleaseItem.item,
mPendingReleaseItem.releaseFence
? mPendingReleaseItem.releaseFence
: Fence::NO_FENCE);
mNumAcquired--;
mPendingReleaseItem.item = BufferItem();
mPendingReleaseItem.releaseFence = nullptr;
}
if (mSubmitted.empty()) {
ALOGE("ERROR: callback with no corresponding submitted buffer item");
}
mPendingReleaseItem.item = std::move(mSubmitted.front());
mSubmitted.pop();
processNextBufferLocked();
mCallbackCV.notify_all();
decStrong((void*)transactionCallbackThunk);
}
void BLASTBufferQueue::processNextBufferLocked() {
ATRACE_CALL();
if (mNumFrameAvailable == 0) {
return;
}
if (mSurfaceControl == nullptr) {
ALOGE("ERROR : surface control is null");
return;
}
SurfaceComposerClient::Transaction localTransaction;
bool applyTransaction = true;
SurfaceComposerClient::Transaction* t = &localTransaction;
if (mNextTransaction != nullptr) {
t = mNextTransaction;
mNextTransaction = nullptr;
applyTransaction = false;
}
BufferItem bufferItem;
status_t status = mBufferItemConsumer->acquireBuffer(&bufferItem, -1, false);
if (status != OK) {
return;
}
auto buffer = bufferItem.mGraphicBuffer;
mNumFrameAvailable--;
if (buffer == nullptr) {
mBufferItemConsumer->releaseBuffer(bufferItem, Fence::NO_FENCE);
return;
}
mNumAcquired++;
mSubmitted.push(bufferItem);
// Ensure BLASTBufferQueue stays alive until we receive the transaction complete callback.
incStrong((void*)transactionCallbackThunk);
t->setBuffer(mSurfaceControl, buffer);
t->setAcquireFence(mSurfaceControl,
bufferItem.mFence ? new Fence(bufferItem.mFence->dup()) : Fence::NO_FENCE);
t->addTransactionCompletedCallback(transactionCallbackThunk, static_cast<void*>(this));
t->setFrame(mSurfaceControl, {0, 0, (int32_t)buffer->getWidth(), (int32_t)buffer->getHeight()});
t->setCrop(mSurfaceControl, computeCrop(bufferItem));
t->setTransform(mSurfaceControl, bufferItem.mTransform);
if (applyTransaction) {
t->apply();
}
}
Rect BLASTBufferQueue::computeCrop(const BufferItem& item) {
if (item.mScalingMode == NATIVE_WINDOW_SCALING_MODE_SCALE_CROP) {
return GLConsumer::scaleDownCrop(item.mCrop, mWidth, mHeight);
}
return item.mCrop;
}
void BLASTBufferQueue::onFrameAvailable(const BufferItem& /*item*/) {
ATRACE_CALL();
std::lock_guard _lock{mMutex};
// add to shadow queue
mNumFrameAvailable++;
processNextBufferLocked();
}
void BLASTBufferQueue::setNextTransaction(SurfaceComposerClient::Transaction* t) {
std::lock_guard _lock{mMutex};
mNextTransaction = t;
}
} // namespace android
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