From df7b3b5ba22bd6295f55c451dd8d4600c447e239 Mon Sep 17 00:00:00 2001
From: Drewol <emildraws@gmail.com>
Date: Tue, 18 May 2021 18:20:49 +0200
Subject: [PATCH] Add support for KSH 'Standard BPM'

---
 Beatmap/include/Beatmap/Beatmap.hpp |  4 +++
 Beatmap/src/BeatmapFromKSH.cpp      |  4 +++
 Main/src/Game.cpp                   | 38 +++++++++++++++++------------
 3 files changed, 31 insertions(+), 15 deletions(-)

diff --git a/Beatmap/include/Beatmap/Beatmap.hpp b/Beatmap/include/Beatmap/Beatmap.hpp
index 5ab041243..c63286886 100644
--- a/Beatmap/include/Beatmap/Beatmap.hpp
+++ b/Beatmap/include/Beatmap/Beatmap.hpp
@@ -44,6 +44,10 @@ struct BeatmapSettings
 	float slamVolume = 1.0f;
 	float laserEffectMix = 1.0f;
 	float musicVolume = 1.0f;
+
+	// BPM Override for mmod calculation
+	float speedBpm = -1.0f;
+
 	EffectType laserEffectType = EffectType::PeakingFilter;
 };
 
diff --git a/Beatmap/src/BeatmapFromKSH.cpp b/Beatmap/src/BeatmapFromKSH.cpp
index 8e58dca83..35b306ae2 100755
--- a/Beatmap/src/BeatmapFromKSH.cpp
+++ b/Beatmap/src/BeatmapFromKSH.cpp
@@ -547,6 +547,10 @@ bool Beatmap::m_ProcessKShootMap(BinaryStream &input, bool metadataOnly)
 		{
 			m_settings.musicVolume = (float)atoi(*s.second) / 100.0f;
 		}
+		else if (s.first == "to")
+		{
+			m_settings.speedBpm = atof(*s.second);
+		}
 	}
 
 	// Temporary map for timing points
diff --git a/Main/src/Game.cpp b/Main/src/Game.cpp
index fdb1e48d9..3259d9abe 100755
--- a/Main/src/Game.cpp
+++ b/Main/src/Game.cpp
@@ -316,28 +316,36 @@ class Game_Impl : public Game
 			MapTime largestMT = -1;
 			double useBPM = -1;
 			double lastBPM = -1;
-			for (TimingPoint* tp : timingPoints)
+
+			if (mapSettings.speedBpm > 0.0f)
+			{
+				useBPM = mapSettings.speedBpm;
+			}
+			else 
 			{
-				double thisBPM = tp->GetBPM();
-				if (!bpmDurations.count(lastBPM))
+				for (TimingPoint* tp : timingPoints)
 				{
-					bpmDurations[lastBPM] = 0;
+					double thisBPM = tp->GetBPM();
+					if (!bpmDurations.count(lastBPM))
+					{
+						bpmDurations[lastBPM] = 0;
+					}
+					MapTime timeSinceLastTP = tp->time - lastMT;
+					bpmDurations[lastBPM] += timeSinceLastTP;
+					if (bpmDurations[lastBPM] > largestMT)
+					{
+						useBPM = lastBPM;
+						largestMT = bpmDurations[lastBPM];
+					}
+					lastMT = tp->time;
+					lastBPM = thisBPM;
 				}
-				MapTime timeSinceLastTP = tp->time - lastMT;
-				bpmDurations[lastBPM] += timeSinceLastTP;
+				bpmDurations[lastBPM] += m_endTime - lastMT;
+
 				if (bpmDurations[lastBPM] > largestMT)
 				{
 					useBPM = lastBPM;
-					largestMT = bpmDurations[lastBPM];
 				}
-				lastMT = tp->time;
-				lastBPM = thisBPM;
-			}
-			bpmDurations[lastBPM] += m_endTime - lastMT;
-
-			if (bpmDurations[lastBPM] > largestMT)
-			{
-				useBPM = lastBPM;
 			}
 
 			m_hispeed = m_modSpeed / useBPM;