NewBufferCount'value changed:simplifying the steps of applying for new buffers
In Commit:0a3e784, the calculation method of newBufferCount was modified from newBufferCount = mCore->mFreeSlots.size(); to newBufferCount = mCore->mFreeSlots.empty() ? 0 : 1;. When the value of newBufferCount is 0, it means that the maximum number of GB has been applied for. At this time, no new GB will be applied for and the code will be returned directly. The maximum value of newBufferCount is 1, and the subsequent steps of applying for a new buffer will only be executed once. So the for loop can be removed here to simplify the code.
Change-Id: I6c72d7c9a672dc091bd462d384481bed5f88e226
Signed-off-by:
Shuangxi Xiang <xiangshuangxi@xiaomi.corp-partner.google.com>
diff --git a/libs/gui/BufferQueueProducer.cpp b/libs/gui/BufferQueueProducer.cpp
index a4d105d..ead9f0f 100644
--- a/libs/gui/BufferQueueProducer.cpp
+++ b/libs/gui/BufferQueueProducer.cpp
@@ -1501,7 +1501,6 @@
const bool useDefaultSize = !width && !height;
while (true) {
- size_t newBufferCount = 0;
uint32_t allocWidth = 0;
uint32_t allocHeight = 0;
PixelFormat allocFormat = PIXEL_FORMAT_UNKNOWN;
@@ -1523,8 +1522,9 @@
// Only allocate one buffer at a time to reduce risks of overlapping an allocation from
// both allocateBuffers and dequeueBuffer.
- newBufferCount = mCore->mFreeSlots.empty() ? 0 : 1;
- if (newBufferCount == 0) {
+ if (mCore->mFreeSlots.empty()) {
+ BQ_LOGV("allocateBuffers: a slot was occupied while "
+ "allocating. Dropping allocated buffer.");
return;
}
@@ -1566,27 +1566,23 @@
};
#endif
- Vector<sp<GraphicBuffer>> buffers;
- for (size_t i = 0; i < newBufferCount; ++i) {
#if COM_ANDROID_GRAPHICS_LIBGUI_FLAGS(BQ_EXTENDEDALLOCATE)
- sp<GraphicBuffer> graphicBuffer = new GraphicBuffer(allocRequest);
+ sp<GraphicBuffer> graphicBuffer = new GraphicBuffer(allocRequest);
#else
- sp<GraphicBuffer> graphicBuffer = new GraphicBuffer(
- allocWidth, allocHeight, allocFormat, BQ_LAYER_COUNT,
- allocUsage, allocName);
+ sp<GraphicBuffer> graphicBuffer = new GraphicBuffer(
+ allocWidth, allocHeight, allocFormat, BQ_LAYER_COUNT,
+ allocUsage, allocName);
#endif
- status_t result = graphicBuffer->initCheck();
+ status_t result = graphicBuffer->initCheck();
- if (result != NO_ERROR) {
- BQ_LOGE("allocateBuffers: failed to allocate buffer (%u x %u, format"
- " %u, usage %#" PRIx64 ")", width, height, format, usage);
- std::lock_guard<std::mutex> lock(mCore->mMutex);
- mCore->mIsAllocating = false;
- mCore->mIsAllocatingCondition.notify_all();
- return;
- }
- buffers.push_back(graphicBuffer);
+ if (result != NO_ERROR) {
+ BQ_LOGE("allocateBuffers: failed to allocate buffer (%u x %u, format"
+ " %u, usage %#" PRIx64 ")", width, height, format, usage);
+ std::lock_guard<std::mutex> lock(mCore->mMutex);
+ mCore->mIsAllocating = false;
+ mCore->mIsAllocatingCondition.notify_all();
+ return;
}
{ // Autolock scope
@@ -1614,15 +1610,13 @@
continue;
}
- for (size_t i = 0; i < newBufferCount; ++i) {
- if (mCore->mFreeSlots.empty()) {
- BQ_LOGV("allocateBuffers: a slot was occupied while "
- "allocating. Dropping allocated buffer.");
- continue;
- }
+ if (mCore->mFreeSlots.empty()) {
+ BQ_LOGV("allocateBuffers: a slot was occupied while "
+ "allocating. Dropping allocated buffer.");
+ } else {
auto slot = mCore->mFreeSlots.begin();
mCore->clearBufferSlotLocked(*slot); // Clean up the slot first
- mSlots[*slot].mGraphicBuffer = buffers[i];
+ mSlots[*slot].mGraphicBuffer = graphicBuffer;
mSlots[*slot].mFence = Fence::NO_FENCE;
#if COM_ANDROID_GRAPHICS_LIBGUI_FLAGS(BQ_EXTENDEDALLOCATE)
mSlots[*slot].mAdditionalOptionsGenerationId = allocOptionsGenId;