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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-FileCopyrightText: Copyright 2014 The Android Open Source Project
// SPDX-License-Identifier: GPL-3.0-or-later
// Parts of this implementation were based on:
// https://cs.android.com/android/platform/superproject/+/android-5.1.1_r38:frameworks/native/libs/gui/BufferQueueCore.cpp
#include "common/assert.h"
#include "core/hle/service/nvnflinger/buffer_queue_core.h"
namespace Service::android {
BufferQueueCore::BufferQueueCore() = default;
BufferQueueCore::~BufferQueueCore() = default;
void BufferQueueCore::SignalDequeueCondition() {
dequeue_possible.store(true);
dequeue_condition.notify_all();
}
bool BufferQueueCore::WaitForDequeueCondition(std::unique_lock<std::mutex>& lk) {
dequeue_condition.wait(lk, [&] { return dequeue_possible.load(); });
dequeue_possible.store(false);
return true;
}
s32 BufferQueueCore::GetMinUndequeuedBufferCountLocked(bool async) const {
// If DequeueBuffer is allowed to error out, we don't have to add an extra buffer.
if (!use_async_buffer) {
return 0;
}
if (dequeue_buffer_cannot_block || async) {
return max_acquired_buffer_count + 1;
}
return max_acquired_buffer_count;
}
s32 BufferQueueCore::GetMinMaxBufferCountLocked(bool async) const {
return GetMinUndequeuedBufferCountLocked(async);
}
s32 BufferQueueCore::GetMaxBufferCountLocked(bool async) const {
const auto min_buffer_count = GetMinMaxBufferCountLocked(async);
auto max_buffer_count = std::max(default_max_buffer_count, min_buffer_count);
if (override_max_buffer_count != 0) {
ASSERT(override_max_buffer_count >= min_buffer_count);
return override_max_buffer_count;
}
// Any buffers that are dequeued by the producer or sitting in the queue waiting to be consumed
// need to have their slots preserved.
for (s32 slot = max_buffer_count; slot < BufferQueueDefs::NUM_BUFFER_SLOTS; ++slot) {
const auto state = slots[slot].buffer_state;
if (state == BufferState::Queued || state == BufferState::Dequeued) {
max_buffer_count = slot + 1;
}
}
return max_buffer_count;
}
s32 BufferQueueCore::GetPreallocatedBufferCountLocked() const {
return static_cast<s32>(std::count_if(slots.begin(), slots.end(),
[](const auto& slot) { return slot.is_preallocated; }));
}
void BufferQueueCore::FreeBufferLocked(s32 slot) {
LOG_DEBUG(Service_Nvnflinger, "slot {}", slot);
slots[slot].graphic_buffer.reset();
slots[slot].buffer_state = BufferState::Free;
slots[slot].frame_number = UINT32_MAX;
slots[slot].acquire_called = false;
slots[slot].fence = Fence::NoFence();
}
void BufferQueueCore::FreeAllBuffersLocked() {
buffer_has_been_queued = false;
for (s32 slot = 0; slot < BufferQueueDefs::NUM_BUFFER_SLOTS; ++slot) {
FreeBufferLocked(slot);
}
}
bool BufferQueueCore::StillTracking(const BufferItem& item) const {
const BufferSlot& slot = slots[item.slot];
return (slot.graphic_buffer != nullptr) && (item.graphic_buffer == slot.graphic_buffer);
}
void BufferQueueCore::WaitWhileAllocatingLocked() const {
while (is_allocating) {
is_allocating_condition.wait(mutex);
}
}
} // namespace Service::android
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