APT: Implement SendCaptureBufferInfo and ReceiveCaptureBufferInfo (#3467)

* APT: Implement SendCaptureBufferInfo and ReceiveCaptureBufferInfo

* adressed comments

* Clear screen_capture_buffer on Receive

* fix response in ReceiveCaptureBufferInfo

* fix response in ReceiveCaptureBufferInfo

* fix clang-format

src/core/hle/service/apt/apt.h

@@ -14,7 +14,7 @@
 namespace Kernel {
 class Mutex;
 class SharedMemory;
-}
+} // namespace Kernel
 
 namespace Service {
 namespace APT {
@@ -212,7 +212,7 @@ public:
          * Outputs:
          *     0 : Return Header
          *     1 : Result of function, 0 on success, otherwise error code
-        */
+         */
         void SendParameter(Kernel::HLERequestContext& ctx);
 
         /**
@@ -313,7 +313,7 @@ public:
          * Outputs:
          *     0 : Return Header
          *     1 : Result of function, 0 on success, otherwise error code
-        */
+         */
         void StartApplication(Kernel::HLERequestContext& ctx);
 
         /**
@@ -420,6 +420,33 @@ public:
          */
         void CancelLibraryApplet(Kernel::HLERequestContext& ctx);
 
+        /**
+         * APT::SendCaptureBufferInfo service function
+         *  Inputs:
+         *      0 : Command header [0x00400042]
+         *      1 : Size
+         *      2 : (Size << 14) | 2
+         *      3 : void*, CaptureBufferInfo
+         *  Outputs:
+         *      0 : Header code
+         *      1 : Result code
+         */
+        void SendCaptureBufferInfo(Kernel::HLERequestContext& ctx);
+
+        /**
+         * APT::ReceiveCaptureBufferInfo service function
+         *  Inputs:
+         *      0 : Command header [0x00410040]
+         *      1 : Size
+         *      64 : Size << 14 | 2
+         *      65 : void*, CaptureBufferInfo
+         *  Outputs:
+         *      0 : Header code
+         *      1 : Result code
+         *      2 : Actual Size
+         */
+        void ReceiveCaptureBufferInfo(Kernel::HLERequestContext& ctx);
+
         /**
          * APT::GetStartupArgument service function
          *  Inputs:
@@ -496,6 +523,8 @@ private:
     // APT::CheckNew3DSApp will check this unknown_ns_state_field to determine processing mode
     u8 unknown_ns_state_field = 0;
 
+    std::vector<u8> screen_capture_buffer;
+
     ScreencapPostPermission screen_capture_post_permission =
         ScreencapPostPermission::CleanThePermission; // TODO(JamePeng): verify the initial value