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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.
*/
#include <gui/BLASTBufferQueue.h>
#include <gui/BufferItemConsumer.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) {
BufferQueue::createBufferQueue(&mProducer, &mConsumer);
mBufferItemConsumer =
new BufferItemConsumer(mConsumer, AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER, 1, true);
mBufferItemConsumer->setName(String8("BLAST Consumer"));
mBufferItemConsumer->setFrameAvailableListener(this);
mBufferItemConsumer->setBufferFreedListener(this);
mBufferItemConsumer->setDefaultBufferSize(mWidth, mHeight);
mBufferItemConsumer->setDefaultBufferFormat(PIXEL_FORMAT_RGBA_8888);
mBufferItemConsumer->setTransformHint(mSurfaceControl->getTransformHint());
}
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};
if (stats.size() > 0 && mNextCallbackBufferItem.mGraphicBuffer != nullptr) {
mBufferItemConsumer->releaseBuffer(mNextCallbackBufferItem,
stats[0].previousReleaseFence
? stats[0].previousReleaseFence
: Fence::NO_FENCE);
mNextCallbackBufferItem = BufferItem();
mBufferItemConsumer->setTransformHint(stats[0].transformHint);
}
mDequeueWaitCV.notify_all();
decStrong((void*)transactionCallbackThunk);
}
void BLASTBufferQueue::onFrameAvailable(const BufferItem& item) {
std::unique_lock _lock{mMutex};
SurfaceComposerClient::Transaction localTransaction;
bool applyTransaction = true;
SurfaceComposerClient::Transaction* t = &localTransaction;
if (mNextTransaction != nullptr) {
t = mNextTransaction;
mNextTransaction = nullptr;
applyTransaction = false;
}
int status = OK;
mNextCallbackBufferItem = mLastSubmittedBufferItem;
mLastSubmittedBufferItem = BufferItem();
status = mBufferItemConsumer->acquireBuffer(&mLastSubmittedBufferItem, -1, false);
if (status != OK) {
ALOGE("Failed to acquire?");
}
auto buffer = mLastSubmittedBufferItem.mGraphicBuffer;
if (buffer == nullptr) {
ALOGE("Null buffer");
return;
}
// Ensure BLASTBufferQueue stays alive until we receive the transaction complete callback.
incStrong((void*)transactionCallbackThunk);
t->setBuffer(mSurfaceControl, buffer);
t->setAcquireFence(mSurfaceControl,
item.mFence ? new Fence(item.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, {0, 0, (int32_t)buffer->getWidth(), (int32_t)buffer->getHeight()});
if (applyTransaction) {
ALOGE("Apply transaction");
t->apply();
if (mNextCallbackBufferItem.mGraphicBuffer != nullptr) {
mDequeueWaitCV.wait_for(_lock, 5000ms);
}
}
}
void BLASTBufferQueue::setNextTransaction(SurfaceComposerClient::Transaction* t) {
std::unique_lock _lock{mMutex};
mNextTransaction = t;
}
} // namespace android
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