From 0c976a221c41693353a29218bc0c8fbac4b87777 Mon Sep 17 00:00:00 2001
From: "born a rick, raised a morty, died a jerry" <minaciousgrace@gmail.com>
Date: Sat, 24 Nov 2018 20:56:37 -0500
Subject: [PATCH] allow song to play its own preview and give lua access
 (experimental)

borp
---
 .../wifeTwirl.lua                             |  1 +
 src/Song.cpp                                  | 27 ++++++++++++++++---
 src/Song.h                                    |  5 +++-
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/Themes/Til Death/BGAnimations/ScreenSelectMusic decorations/wifeTwirl.lua b/Themes/Til Death/BGAnimations/ScreenSelectMusic decorations/wifeTwirl.lua
index f3c30f37c1..bd50bbc829 100644
--- a/Themes/Til Death/BGAnimations/ScreenSelectMusic decorations/wifeTwirl.lua	
+++ b/Themes/Til Death/BGAnimations/ScreenSelectMusic decorations/wifeTwirl.lua	
@@ -114,6 +114,7 @@ local function toggleNoteField()
 	return end
 
 	if song then 
+		song:Borp()
 		if mcbootlarder:GetVisible() then
 			mcbootlarder:visible(false)
 			mcbootlarder:GetChild("NoteField"):visible(false)
diff --git a/src/Song.cpp b/src/Song.cpp
index 0de1577cce..e524fb64e8 100644
--- a/src/Song.cpp
+++ b/src/Song.cpp
@@ -1,4 +1,4 @@
-#include "global.h"
+#include "global.h"
 #include "FontCharAliases.h"
 #include "GameManager.h"
 #include "RageLog.h"
@@ -34,6 +34,7 @@
 #include "LyricsLoader.h"
 #include "ActorUtil.h"
 #include "CommonMetrics.h"
+#include "GameSoundManager.h"
 
 #include "GameState.h"
 #include <cfloat>
@@ -2047,6 +2048,21 @@ Song::IsMarathon() const
 	return m_fMusicLengthSeconds >= g_fMarathonVerSongSeconds;
 }
 
+void
+Song::Borp()
+{
+	GameSoundManager::PlayMusicParams PlayParams;
+	PlayParams.sFile = m_sMusicFile;
+	PlayParams.pTiming = &this->m_SongTiming;
+	PlayParams.bForceLoop = true;
+	PlayParams.fStartSecond = m_fMusicSampleStartSeconds;
+	PlayParams.fLengthSeconds = GetLastSecond() + 2.f;
+	PlayParams.fFadeOutLengthSeconds = 1.f;
+	PlayParams.bAlignBeat = true;
+	PlayParams.bApplyMusicRate = true;
+	SOUND->PlayMusic(PlayParams);
+}
+
 // lua start
 #include "LuaBinding.h"
 
@@ -2468,13 +2484,17 @@ class LunaSong : public Luna<Song>
 		p->ReloadFromSongDir();
 		COMMON_RETURN_SELF;
 	}
-
 	static int GetOrTryAtLeastToGetSimfileAuthor(T* p, lua_State* L)
 	{
 		lua_pushstring(L, p->GetOrTryAtLeastToGetSimfileAuthor());
 		return 1;
 	}
-
+	static int Borp(T* p, lua_State* L)
+	{
+		p->Borp();
+		return 0;
+	}
+	
 	LunaSong()
 	{
 		ADD_METHOD(GetDisplayFullTitle);
@@ -2543,6 +2563,7 @@ class LunaSong : public Luna<Song>
 		ADD_METHOD(GetPreviewVidPath);
 		ADD_METHOD(GetPreviewMusicPath);
 		ADD_METHOD(ReloadFromSongDir);
+		ADD_METHOD(Borp);
 	}
 };
 
diff --git a/src/Song.h b/src/Song.h
index f87ebfd402..f7205ece4c 100644
--- a/src/Song.h
+++ b/src/Song.h
@@ -1,4 +1,4 @@
-#ifndef SONG_H
+#ifndef SONG_H
 #define SONG_H
 
 #include "Difficulty.h"
@@ -438,6 +438,9 @@ class Song
 	bool IsLong() const;
 	bool IsMarathon() const;
 
+	// plays music for chart preview and is available to lua -mina
+	void Borp();
+
 	bool SongCompleteForStyle(const Style* st) const;
 	bool HasStepsType(StepsType st) const;
 	bool HasStepsTypeAndDifficulty(StepsType st, Difficulty dc) const;