hle: nvflinger: Use std::chrono for present_ns.

src/core/hle/service/nvflinger/buffer_item_consumer.cpp

@@ -15,7 +15,7 @@ namespace Service::android {
 BufferItemConsumer::BufferItemConsumer(std::unique_ptr<BufferQueueConsumer> consumer_)
     : ConsumerBase{std::move(consumer_)} {}
 
-Status BufferItemConsumer::AcquireBuffer(BufferItem* item, u64 present_when_ns,
+Status BufferItemConsumer::AcquireBuffer(BufferItem* item, std::chrono::nanoseconds present_when,
                                          bool wait_for_fence) {
     if (!item) {
         return Status::BadValue;
@@ -23,7 +23,7 @@ Status BufferItemConsumer::AcquireBuffer(BufferItem* item, u64 present_when_ns,
 
     std::unique_lock lock(mutex);
 
-    if (const auto status = AcquireBufferLocked(item, present_when_ns); status != Status::NoError) {
+    if (const auto status = AcquireBufferLocked(item, present_when); status != Status::NoError) {
         if (status != Status::NoBufferAvailable) {
             LOG_ERROR(Service_NVFlinger, "Failed to acquire buffer: {}", status);
         }

src/core/hle/service/nvflinger/buffer_item_consumer.h

@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <chrono>
 #include <memory>
 
 #include "common/common_types.h"
@@ -19,7 +20,8 @@ class BufferItem;
 class BufferItemConsumer final : public ConsumerBase {
 public:
     explicit BufferItemConsumer(std::unique_ptr<BufferQueueConsumer> consumer);
-    Status AcquireBuffer(BufferItem* item, u64 present_when_ns, bool wait_for_fence = true);
+    Status AcquireBuffer(BufferItem* item, std::chrono::nanoseconds present_when,
+                         bool wait_for_fence = true);
     Status ReleaseBuffer(const BufferItem& item, Fence& release_fence);
 };
 

src/core/hle/service/nvflinger/buffer_queue_consumer.cpp

@@ -17,7 +17,8 @@ BufferQueueConsumer::BufferQueueConsumer(std::shared_ptr<BufferQueueCore> core_)
 
 BufferQueueConsumer::~BufferQueueConsumer() = default;
 
-Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer, s64 expected_presenst_ns,
+Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer,
+                                          std::chrono::nanoseconds expected_present,
                                           u64 max_frame_number) {
     s32 num_dropped_buffers{};
 
@@ -26,12 +27,10 @@ Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer, s64 expected_p
         std::unique_lock lock(core->mutex);
 
         // Check that the consumer doesn't currently have the maximum number of buffers acquired.
-        s32 num_acquired_buffers{};
+        const s32 num_acquired_buffers{
-        for (const auto& slot : slots) {
+            static_cast<s32>(std::count_if(slots.begin(), slots.end(), [](const auto& slot) {
-            if (slot.buffer_state == BufferState::Acquired) {
+                return slot.buffer_state == BufferState::Acquired;
-                ++num_acquired_buffers;
+            }))};
-            }
-        }
 
         if (num_acquired_buffers >= core->max_acquired_buffer_count + 1) {
             LOG_ERROR(Service_NVFlinger, "max acquired buffer count reached: {} (max {})",
@@ -46,8 +45,8 @@ Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer, s64 expected_p
 
         auto front(core->queue.begin());
 
-        // If expected_presenst_ns is specified, we may not want to return a buffer yet.
+        // If expected_present is specified, we may not want to return a buffer yet.
-        if (expected_presenst_ns != 0) {
+        if (expected_present.count() != 0) {
             constexpr auto MAX_REASONABLE_NSEC = 1000000000LL; // 1 second
 
             // The expected_presenst_ns argument indicates when the buffer is expected to be
@@ -63,17 +62,17 @@ Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer, s64 expected_p
 
                 // If entry[1] is timely, drop entry[0] (and repeat).
                 const auto desired_present = buffer_item.timestamp;
-                if (desired_present < expected_presenst_ns - MAX_REASONABLE_NSEC ||
+                if (desired_present < expected_present.count() - MAX_REASONABLE_NSEC ||
-                    desired_present > expected_presenst_ns) {
+                    desired_present > expected_present.count()) {
                     // This buffer is set to display in the near future, or desired_present is
                     // garbage.
                     LOG_DEBUG(Service_NVFlinger, "nodrop desire={} expect={}", desired_present,
-                              expected_presenst_ns);
+                              expected_present.count());
                     break;
                 }
 
                 LOG_DEBUG(Service_NVFlinger, "drop desire={} expect={} size={}", desired_present,
-                          expected_presenst_ns, core->queue.size());
+                          expected_present.count(), core->queue.size());
 
                 if (core->StillTracking(&*front)) {
                     // Front buffer is still in mSlots, so mark the slot as free
@@ -89,19 +88,20 @@ Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer, s64 expected_p
 
             // See if the front buffer is ready to be acquired.
             const auto desired_present = front->timestamp;
-            const auto buffer_is_due = desired_present <= expected_presenst_ns ||
+            const auto buffer_is_due =
-                                       desired_present > expected_presenst_ns + MAX_REASONABLE_NSEC;
+                desired_present <= expected_present.count() ||
+                desired_present > expected_present.count() + MAX_REASONABLE_NSEC;
             const auto consumer_is_ready =
                 max_frame_number > 0 ? front->frame_number <= max_frame_number : true;
 
             if (!buffer_is_due || !consumer_is_ready) {
                 LOG_DEBUG(Service_NVFlinger, "defer desire={} expect={}", desired_present,
-                          expected_presenst_ns);
+                          expected_present.count());
                 return Status::PresentLater;
             }
 
             LOG_DEBUG(Service_NVFlinger, "accept desire={} expect={}", desired_present,
-                      expected_presenst_ns);
+                      expected_present.count());
         }
 
         const auto slot = front->slot;

src/core/hle/service/nvflinger/buffer_queue_consumer.h

@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <chrono>
 #include <memory>
 
 #include "common/common_types.h"
@@ -23,7 +24,7 @@ public:
     explicit BufferQueueConsumer(std::shared_ptr<BufferQueueCore> core_);
     ~BufferQueueConsumer();
 
-    Status AcquireBuffer(BufferItem* out_buffer, s64 expected_presenst_ns,
+    Status AcquireBuffer(BufferItem* out_buffer, std::chrono::nanoseconds expected_present,
                          u64 max_frame_number = 0);
     Status ReleaseBuffer(s32 slot, u64 frame_number, const Fence& release_fence);
     Status Connect(std::shared_ptr<IConsumerListener> consumer_listener, bool controlled_by_app);

src/core/hle/service/nvflinger/consumer_base.cpp

@@ -52,14 +52,14 @@ void ConsumerBase::OnBuffersReleased() {
 
 void ConsumerBase::OnSidebandStreamChanged() {}
 
-Status ConsumerBase::AcquireBufferLocked(BufferItem* item, u64 present_when_ns,
+Status ConsumerBase::AcquireBufferLocked(BufferItem* item, std::chrono::nanoseconds present_when,
                                          u64 max_frame_number) {
     if (is_abandoned) {
         LOG_ERROR(Service_NVFlinger, "consumer is abandoned!");
         return Status::NoInit;
     }
 
-    Status err = consumer->AcquireBuffer(item, present_when_ns, max_frame_number);
+    Status err = consumer->AcquireBuffer(item, present_when, max_frame_number);
     if (err != Status::NoError) {
         return err;
     }

src/core/hle/service/nvflinger/consumer_base.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include <array>
+#include <chrono>
 #include <memory>
 #include <mutex>
 
@@ -34,7 +35,8 @@ protected:
     virtual void OnSidebandStreamChanged() override;
 
     void FreeBufferLocked(s32 slot_index);
-    Status AcquireBufferLocked(BufferItem* item, u64 present_when_ns, u64 max_frame_number = 0);
+    Status AcquireBufferLocked(BufferItem* item, std::chrono::nanoseconds present_when,
+                               u64 max_frame_number = 0);
     Status ReleaseBufferLocked(s32 slot, const std::shared_ptr<GraphicBuffer> graphic_buffer);
     bool StillTracking(s32 slot, const std::shared_ptr<GraphicBuffer> graphic_buffer);
     Status AddReleaseFenceLocked(s32 slot, const std::shared_ptr<GraphicBuffer> graphic_buffer,

src/core/hle/service/nvflinger/nvflinger.cpp

@@ -240,7 +240,7 @@ void NVFlinger::Compose() {
         VI::Layer& layer = display.GetLayer(0);
 
         android::BufferItem buffer{};
-        const auto status = layer.GetConsumer().AcquireBuffer(&buffer, 0, false);
+        const auto status = layer.GetConsumer().AcquireBuffer(&buffer, {}, false);
 
         if (status != android::Status::NoError) {
             continue;