From 2799234fbb1635e9d37007979a383807fcf1b56c Mon Sep 17 00:00:00 2001
From: The-Little-Wolf <116989599+The-Little-Wolf@users.noreply.github.com>
Date: Mon, 29 Jun 2026 15:26:07 -0700
Subject: [PATCH] [Xam/XMP] - Stub XMPGetNumSongsInTitlePlaylist

- Stub XMPGetNumSongsInTitlePlaylist
---
 src/xenia/kernel/xam/apps/xmp_app.cc | 22 ++++++++++++++++++++++
 src/xenia/kernel/xam/apps/xmp_app.h  |  7 +++++++
 2 files changed, 29 insertions(+)

diff --git a/src/xenia/kernel/xam/apps/xmp_app.cc b/src/xenia/kernel/xam/apps/xmp_app.cc
index 5534215fa..f3c78c2d1 100644
--- a/src/xenia/kernel/xam/apps/xmp_app.cc
+++ b/src/xenia/kernel/xam/apps/xmp_app.cc
@@ -563,6 +563,28 @@ X_HRESULT XmpApp::DispatchMessageSync(uint32_t message, uint32_t buffer_ptr,
       kernel_state_->BroadcastNotification(kXNotificationXmpDashInitChanged, 1);
       return X_E_SUCCESS;
     }
+    case 0x00070031: {
+      // XMPGetNumSongsInTitlePlaylist
+      // Song count exist at playlist_ptr->0x78, if playlist_ptr->0xc == 0 or 1
+      // return song count, else return zero
+      assert_true(!buffer_length ||
+                  buffer_length == sizeof(XMP_GET_NUM_SONGS_IN_TITLE_PLAYLIST));
+      XMP_GET_NUM_SONGS_IN_TITLE_PLAYLIST* args =
+          reinterpret_cast<XMP_GET_NUM_SONGS_IN_TITLE_PLAYLIST*>(buffer);
+
+      XELOGD(
+          "XMPGetNumSongsInTitlePlaylist({:08X}, {:08X}, {:08X}), "
+          "unimplemented",
+          uint32_t(args->xmp_client.get()), args->playlist_ptr.get(),
+          args->song_count_ptr.get());
+
+      if (!args->playlist_ptr || !args->song_count_ptr) {
+        return X_E_INVALIDARG;
+      }
+      xe::store_and_swap<uint32_t>(
+          memory_->TranslateVirtual(args->song_count_ptr), 0);
+      return X_E_SUCCESS;
+    }
     case 0x0007003D: {
       // XMPCaptureOutput
       assert_true(!buffer_length ||
diff --git a/src/xenia/kernel/xam/apps/xmp_app.h b/src/xenia/kernel/xam/apps/xmp_app.h
index a2b2dab58..5fbb136a4 100644
--- a/src/xenia/kernel/xam/apps/xmp_app.h
+++ b/src/xenia/kernel/xam/apps/xmp_app.h
@@ -194,6 +194,13 @@ struct XMP_DASH_INIT {
 };
 static_assert_size(XMP_DASH_INIT, 0x18);
 
+struct XMP_GET_NUM_SONGS_IN_TITLE_PLAYLIST {
+  xe::be<apu::XMP_CLIENT> xmp_client;
+  xe::be<uint32_t> playlist_ptr;
+  xe::be<uint32_t> song_count_ptr;
+};
+static_assert_size(XMP_GET_NUM_SONGS_IN_TITLE_PLAYLIST, 0xC);
+
 struct XMP_CAPTURE_OUTPUT {
   xe::be<apu::XMP_CLIENT> xmp_client;
   xe::be<uint32_t> callback;