From c0118a4b825cdf75693d438de51493980145ac30 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sun, 24 Sep 2023 17:47:20 -0500
Subject: [PATCH] GUI: wake up on MIDI event

---
 src/gui/gui.cpp | 18 +++++++++++++++++-
 src/gui/gui.h   |  3 +++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index c81e552c1..48a27a057 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -3584,6 +3584,9 @@ bool FurnaceGUI::loop() {
             SDL_free(ev.drop.file);
           }
           break;
+        case SDL_USEREVENT:
+          // used for MIDI wake up
+          break;
         case SDL_QUIT:
           if (modified) {
             showWarning("Unsaved changes! Save changes before quitting?",GUI_WARN_QUIT);
@@ -3647,6 +3650,7 @@ bool FurnaceGUI::loop() {
 
     while (true) {
       midiLock.lock();
+      midiWakeUp=true;
       if (midiQueue.empty()) {
         midiLock.unlock();
         break;
@@ -6729,11 +6733,20 @@ bool FurnaceGUI::init() {
 
   firstFrame=true;
 
-  // TODO: MIDI mapping time!
+  userEvents=SDL_RegisterEvents(1);
+
   e->setMidiCallback([this](const TAMidiMessage& msg) -> int {
     if (introPos<11.0) return -2;
     midiLock.lock();
     midiQueue.push(msg);
+    if (userEvents!=0xffffffff && midiWakeUp) {
+      midiWakeUp=false;
+      userEvent.user.type=userEvents;
+      userEvent.user.code=0;
+      userEvent.user.data1=NULL;
+      userEvent.user.data2=NULL;
+      SDL_PushEvent(&userEvent);
+    }
     midiLock.unlock();
     e->setMidiBaseChan(cursor.xCoarse);
     if (msg.type==TA_MIDI_SYSEX) return -2;
@@ -7013,6 +7026,7 @@ FurnaceGUI::FurnaceGUI():
   displayEditString(false),
   mobileEdit(false),
   killGraphics(false),
+  midiWakeUp(true),
   audioEngineChanged(false),
   settingsChanged(false),
   debugFFT(false),
@@ -7026,6 +7040,8 @@ FurnaceGUI::FurnaceGUI():
   mobileEditPage(0),
   wheelCalmDown(0),
   shallDetectScale(0),
+  cpuCores(0),
+  userEvents(0xffffffff),
   mobileMenuPos(0.0f),
   autoButtonSize(0.0f),
   mobileEditAnim(0.0f),
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 0c495a6ee..f0e2e7555 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -1345,6 +1345,7 @@ class FurnaceGUI {
   bool displayPendingIns, pendingInsSingle, displayPendingRawSample, snesFilterHex, modTableHex, displayEditString;
   bool mobileEdit;
   bool killGraphics;
+  bool midiWakeUp;
   bool audioEngineChanged, settingsChanged, debugFFT;
   bool willExport[DIV_MAX_CHIPS];
   int vgmExportVersion;
@@ -1358,6 +1359,7 @@ class FurnaceGUI {
   int wheelCalmDown;
   int shallDetectScale;
   int cpuCores;
+  unsigned int userEvents;
   float mobileMenuPos, autoButtonSize, mobileEditAnim;
   ImVec2 mobileEditButtonPos, mobileEditButtonSize;
   const int* curSysSection;
@@ -1371,6 +1373,7 @@ class FurnaceGUI {
   void* fmPreviewOPZ;
   void* fmPreviewOPZInterface;
   String* editString;
+  SDL_Event userEvent;
 
   String pendingRawSample;
   int pendingRawSampleDepth, pendingRawSampleChannels;