add sudachi getbufferhistory implementation

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

@@ -101,6 +101,14 @@ Status BufferQueueConsumer::AcquireBuffer(BufferItem* out_buffer,
         // slot to the producer, it will wait for the fence to pass. We should fix this
         // by properly waiting for the fence in the BufferItemConsumer.
         // slots[slot].fence = Fence::NoFence();
+
+        const auto target_frame_number = slots[slot].frame_number;
+        for (size_t i = 0; i < core->history.size(); i++) {
+            if (core->history[i].frame_number = target_frame_number) {
+                core->history[i].state = BufferState::Acquired;
+                break;
+            }
+        }
     }
 
     // If the buffer has previously been acquired by the consumer, set graphic_buffer to nullptr to

src/core/hle/service/nvnflinger/buffer_queue_core.cpp

@@ -10,7 +10,9 @@
 
 namespace Service::android {
 
-BufferQueueCore::BufferQueueCore() = default;
+BufferQueueCore::BufferQueueCore() {
+    history.resize(8);
+};
 
 BufferQueueCore::~BufferQueueCore() = default;
 

src/core/hle/service/nvnflinger/buffer_queue_core.h

@@ -72,6 +72,15 @@ private:
     u32 transform_hint{};
     bool is_allocating{};
     mutable std::condition_variable_any is_allocating_condition;
+
+    class BufferInfo final {
+    public:
+        u64 frame_number{};
+        s64 queue_time{}, presentation_time{};
+        BufferState state{BufferState::Free};
+    };
+
+    std::vector<BufferInfo> history;
 };
 
 } // namespace Service::android

src/core/hle/service/nvnflinger/buffer_queue_producer.cpp

@@ -512,6 +512,8 @@ Status BufferQueueProducer::QueueBuffer(s32 slot, const QueueBufferInput& input,
         slots[slot].buffer_state = BufferState::Queued;
         ++core->frame_counter;
         slots[slot].frame_number = core->frame_counter;
+        slots[slot].queue_time = 0;
+        slots[slot].presentation_time = 0;
 
         item.acquire_called = slots[slot].acquire_called;
         item.graphic_buffer = slots[slot].graphic_buffer;
@@ -528,6 +530,13 @@ Status BufferQueueProducer::QueueBuffer(s32 slot, const QueueBufferInput& input,
         item.is_droppable = core->dequeue_buffer_cannot_block || async;
         item.swap_interval = swap_interval;
 
+        // TODO: .queue_time should be changed to the correct value
+        position = (position + 1) % 8;
+        LOG_WARNING(Service_Nvnflinger, "position={}", position);
+        core->history[position] = {.frame_number = core->frame_counter,
+                                   .queue_time = slots[slot].queue_time,
+                                   .state = BufferState::Queued};
+
         sticky_transform = sticky_transform_;
 
         if (core->queue.empty()) {
@@ -803,6 +812,10 @@ Status BufferQueueProducer::SetPreallocatedBuffer(s32 slot,
     return Status::NoError;
 }
 
+Kernel::KReadableEvent* BufferQueueProducer::GetNativeHandle(u32 type_id) {
+    return &buffer_wait_event->GetReadableEvent();
+}
+
 void BufferQueueProducer::Transact(u32 code, std::span<const u8> parcel_data,
                                    std::span<u8> parcel_reply, u32 flags) {
     // Values used by BnGraphicBufferProducer onTransact
@@ -922,9 +935,27 @@ void BufferQueueProducer::Transact(u32 code, std::span<const u8> parcel_data,
         status = SetBufferCount(buffer_count);
         break;
     }
-    case TransactionId::GetBufferHistory:
-        LOG_WARNING(Service_Nvnflinger, "(STUBBED) called, transaction=GetBufferHistory");
+    case TransactionId::GetBufferHistory: {
+        LOG_WARNING(Service_Nvnflinger, "(STUBBED) called");
+
+        std::scoped_lock lock{core->mutex};
+
+        auto buffer_history_count = std::min(parcel_in.Read<s32>(), (s32)core->history.size());
+
+        BufferQueueCore::BufferInfo* info = new BufferQueueCore::BufferInfo[buffer_history_count];
+        auto pos = position;
+        for (int i = 0; i < buffer_history_count; i++) {
+            info[i] = core->history[(pos - i) % core->history.size()];
+            LOG_WARNING(Service_Nvnflinger, "frame_number={}, state={}",
+                        core->history[(pos - i) % core->history.size()].frame_number,
+                        (u32)core->history[(pos - i) % core->history.size()].state);
+            pos--;
+        }
+
+        parcel_out.WriteFlattenedObject<BufferQueueCore::BufferInfo>(info);
+        status = Status::NoError;
         break;
+    }
     default:
         ASSERT_MSG(false, "Unimplemented TransactionId {}", code);
         break;
@@ -937,8 +968,5 @@ void BufferQueueProducer::Transact(u32 code, std::span<const u8> parcel_data,
                 std::min(parcel_reply.size(), serialized.size()));
 }
 
-Kernel::KReadableEvent* BufferQueueProducer::GetNativeHandle(u32 type_id) {
-    return &buffer_wait_event->GetReadableEvent();
-}
 
 } // namespace Service::android

src/core/hle/service/nvnflinger/buffer_queue_producer.h

@@ -86,6 +86,8 @@ private:
     s32 current_callback_ticket{};
     std::condition_variable_any callback_condition;
 
+    u64 position;
+
     Service::Nvidia::NvCore::NvMap& nvmap;
 };
 

src/core/hle/service/nvnflinger/buffer_slot.h

@@ -34,6 +34,7 @@ struct BufferSlot final {
     bool needs_cleanup_on_release{};
     bool attached_by_consumer{};
     bool is_preallocated{};
+    s64 queue_time{}, presentation_time{};
 };
 
 } // namespace Service::android