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Merge pull request #3635 from FernandoS27/buffer-free

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Buffer queue: Correct behavior of free buffer.
This commit is contained in:
Rodrigo Locatti 2020-04-11 17:58:15 -03:00 committed by GitHub
commit 75e39f7f88
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2 changed files with 33 additions and 9 deletions
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29
src/core/hle/service/nvflinger/buffer_queue.cpp
View file

@ -28,6 +28,7 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
buffer.slot = slot;
buffer.igbp_buffer = igbp_buffer;
buffer.status = Buffer::Status::Free;
free_buffers.push_back(slot);
queue.emplace_back(buffer);
buffer_wait_event.writable->Signal();
@ -35,17 +36,38 @@ void BufferQueue::SetPreallocatedBuffer(u32 slot, const IGBPBuffer& igbp_buffer)
std::optional<std::pair<u32, Service::Nvidia::MultiFence*>> BufferQueue::DequeueBuffer(u32 width,
u32 height) {
auto itr = std::find_if(queue.begin(), queue.end(), [&](const Buffer& buffer) {
// Only consider free buffers. Buffers become free once again after they've been Acquired
// and Released by the compositor, see the NVFlinger::Compose method.
if (free_buffers.empty()) {
return {};
}
auto f_itr = free_buffers.begin();
auto itr = queue.end();
while (f_itr != free_buffers.end()) {
auto slot = *f_itr;
itr = std::find_if(queue.begin(), queue.end(), [&](const Buffer& buffer) {
// Only consider free buffers. Buffers become free once again after they've been
// Acquired and Released by the compositor, see the NVFlinger::Compose method.
if (buffer.status != Buffer::Status::Free) {
return false;
}
if (buffer.slot != slot) {
return false;
}
// Make sure that the parameters match.
return buffer.igbp_buffer.width == width && buffer.igbp_buffer.height == height;
});
if (itr != queue.end()) {
free_buffers.erase(f_itr);
break;
}
++f_itr;
}
if (itr == queue.end()) {
return {};
}
@ -99,6 +121,7 @@ void BufferQueue::ReleaseBuffer(u32 slot) {
ASSERT(itr != queue.end());
ASSERT(itr->status == Buffer::Status::Acquired);
itr->status = Buffer::Status::Free;
free_buffers.push_back(slot);
buffer_wait_event.writable->Signal();
}

1
src/core/hle/service/nvflinger/buffer_queue.h
View file

@ -101,6 +101,7 @@ private:
u32 id;
u64 layer_id;
std::list<u32> free_buffers;
std::vector<Buffer> queue;
std::list<u32> queue_sequence;
Kernel::EventPair buffer_wait_event;