diff --git a/src/core/hle/service/vi/vi.cpp b/src/core/hle/service/vi/vi.cpp
index 55f196ab0..1f00a6cca 100644
--- a/src/core/hle/service/vi/vi.cpp
+++ b/src/core/hle/service/vi/vi.cpp
@@ -453,85 +453,60 @@ private:
         SetPreallocatedBuffer = 14
     };
 
-    void TransactParcel(u32 id, TransactionId transaction, const std::vector<u8>& input_data,
-                        VAddr output_addr, u64 output_size) {
-        auto buffer_queue = nv_flinger->GetBufferQueue(id);
-
-        if (transaction == TransactionId::Connect) {
-            IGBPConnectRequestParcel request{input_data};
-            IGBPConnectResponseParcel response{1280, 720};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::SetPreallocatedBuffer) {
-            IGBPSetPreallocatedBufferRequestParcel request{input_data};
-
-            buffer_queue->SetPreallocatedBuffer(request.data.slot, request.buffer);
-
-            IGBPSetPreallocatedBufferResponseParcel response{};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::DequeueBuffer) {
-            IGBPDequeueBufferRequestParcel request{input_data};
-
-            u32 slot = buffer_queue->DequeueBuffer(request.data.pixel_format, request.data.width,
-                                                   request.data.height);
-
-            IGBPDequeueBufferResponseParcel response{slot};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::RequestBuffer) {
-            IGBPRequestBufferRequestParcel request{input_data};
-
-            auto& buffer = buffer_queue->RequestBuffer(request.slot);
-
-            IGBPRequestBufferResponseParcel response{buffer};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::QueueBuffer) {
-            IGBPQueueBufferRequestParcel request{input_data};
-
-            buffer_queue->QueueBuffer(request.data.slot, request.data.transform);
-
-            IGBPQueueBufferResponseParcel response{1280, 720};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::Query) {
-            IGBPQueryRequestParcel request{input_data};
-
-            u32 value =
-                buffer_queue->Query(static_cast<NVFlinger::BufferQueue::QueryType>(request.type));
-
-            IGBPQueryResponseParcel response{value};
-            std::vector<u8> response_buffer = response.Serialize();
-            Memory::WriteBlock(output_addr, response_buffer.data(), response_buffer.size());
-        } else if (transaction == TransactionId::CancelBuffer) {
-            LOG_WARNING(Service_VI, "(STUBBED) called, transaction=CancelBuffer");
-        } else {
-            ASSERT_MSG(false, "Unimplemented");
-        }
-    }
-
     void TransactParcel(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
         u32 id = rp.Pop<u32>();
         auto transaction = static_cast<TransactionId>(rp.Pop<u32>());
         u32 flags = rp.Pop<u32>();
+        auto buffer_queue = nv_flinger->GetBufferQueue(id);
+
         LOG_DEBUG(Service_VI, "called, transaction=%x", transaction);
 
-        if (ctx.BufferDescriptorA()[0].Size() != 0) {
-            auto& input_buffer = ctx.BufferDescriptorA()[0];
-            auto& output_buffer = ctx.BufferDescriptorB()[0];
-            std::vector<u8> input_data(input_buffer.Size());
-            Memory::ReadBlock(input_buffer.Address(), input_data.data(), input_buffer.Size());
-            TransactParcel(id, transaction, input_data, output_buffer.Address(),
-                           output_buffer.Size());
+        if (transaction == TransactionId::Connect) {
+            IGBPConnectRequestParcel request{ctx.ReadBuffer()};
+            IGBPConnectResponseParcel response{1280, 720};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::SetPreallocatedBuffer) {
+            IGBPSetPreallocatedBufferRequestParcel request{ctx.ReadBuffer()};
+
+            buffer_queue->SetPreallocatedBuffer(request.data.slot, request.buffer);
+
+            IGBPSetPreallocatedBufferResponseParcel response{};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::DequeueBuffer) {
+            IGBPDequeueBufferRequestParcel request{ctx.ReadBuffer()};
+
+            u32 slot = buffer_queue->DequeueBuffer(request.data.pixel_format, request.data.width,
+                                                   request.data.height);
+
+            IGBPDequeueBufferResponseParcel response{slot};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::RequestBuffer) {
+            IGBPRequestBufferRequestParcel request{ctx.ReadBuffer()};
+
+            auto& buffer = buffer_queue->RequestBuffer(request.slot);
+
+            IGBPRequestBufferResponseParcel response{buffer};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::QueueBuffer) {
+            IGBPQueueBufferRequestParcel request{ctx.ReadBuffer()};
+
+            buffer_queue->QueueBuffer(request.data.slot, request.data.transform);
+
+            IGBPQueueBufferResponseParcel response{1280, 720};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::Query) {
+            IGBPQueryRequestParcel request{ctx.ReadBuffer()};
+
+            u32 value =
+                buffer_queue->Query(static_cast<NVFlinger::BufferQueue::QueryType>(request.type));
+
+            IGBPQueryResponseParcel response{value};
+            ctx.WriteBuffer(response.Serialize());
+        } else if (transaction == TransactionId::CancelBuffer) {
+            LOG_WARNING(Service_VI, "(STUBBED) called, transaction=CancelBuffer");
         } else {
-            auto& input_buffer = ctx.BufferDescriptorX()[0];
-            auto& output_buffer = ctx.BufferDescriptorC()[0];
-            std::vector<u8> input_data(input_buffer.size);
-            Memory::ReadBlock(input_buffer.Address(), input_data.data(), input_buffer.size);
-            TransactParcel(id, transaction, input_data, output_buffer.Address(),
-                           output_buffer.Size());
+            ASSERT_MSG(false, "Unimplemented");
         }
 
         IPC::ResponseBuilder rb{ctx, 2};