Allow gamesoundmanager to get/set current music playing params

src/Etterna/Singletons/GameSoundManager.cpp

@@ -111,6 +111,14 @@ struct SoundPositionSetter
 };
 vector<SoundPositionSetter> g_PositionsToSet;
 
+// A param to set on a sound
+struct MusicParamSetter
+{
+	RageSound* m_psound;
+	RageSoundParams p;
+};
+vector<MusicParamSetter> g_ParamsToSet;
+
 void
 GameSoundManager::StartMusic(MusicToPlay& ToPlay)
 {
@@ -329,7 +337,8 @@ GameSoundManager::SoundWaiting()
 {
 	return !g_SoundsToPlayOnce.empty() || !g_SoundsToPlayOnceFromDir.empty() ||
 		   !g_SoundsToPlayOnceFromAnnouncer.empty() ||
-		   !g_MusicsToPlay.empty() || !g_PositionsToSet.empty();
+		   !g_MusicsToPlay.empty() || !g_PositionsToSet.empty() ||
+		   !g_ParamsToSet.empty();
 }
 
 void
@@ -405,6 +414,20 @@ GameSoundManager::HandleSetPosition()
 	}
 }
 
+void
+GameSoundManager::HandleSetParams()
+{
+	g_Mutex->Lock();
+	vector<MusicParamSetter> vec = g_ParamsToSet;
+	g_ParamsToSet.clear();
+	g_Mutex->Unlock();
+	for (unsigned i = 0; i < vec.size(); i++) {
+		CHECKPOINT_M("Setting params for sound.");
+		// vec[i].m_psound->SetParams(vec[i].p);
+		g_Playing->m_Music->SetParams(vec[i].p);
+	}
+}
+
 void
 GameSoundManager::Flush()
 {
@@ -437,6 +460,7 @@ MusicThread_start(void* p)
 
 		soundman->StartQueuedSounds();
 
+		soundman->HandleSetParams();
 		soundman->HandleSetPosition();
 
 		if (bFlushing) {
@@ -732,6 +756,27 @@ GameSoundManager::SetSoundPosition(RageSound* s, float fSeconds)
 	g_Mutex->Unlock();
 }
 
+void
+GameSoundManager::SetPlayingMusicParams(RageSoundParams p)
+{
+	// This will replace the params for the music pointer
+	// So needs to be first filled out by the existing params
+	// (preferably, unless the intention is to overwrite them)
+	MusicParamSetter prm;
+	// prm.m_psound = g_Playing->m_Music;
+	prm.p = p;
+	g_Mutex->Lock();
+	g_ParamsToSet.push_back(prm);
+	g_Mutex->Broadcast();
+	g_Mutex->Unlock();
+}
+
+const RageSoundParams&
+GameSoundManager::GetPlayingMusicParams()
+{
+	return g_Playing->m_Music->GetParams();
+}
+
 void
 GameSoundManager::PlayMusic(const std::string& sFile,
 							const TimingData* pTiming,

src/Etterna/Singletons/GameSoundManager.h

@@ -5,6 +5,7 @@
 #include "Etterna/Models/Misc/PlayerNumber.h"
 #include "MessageManager.h"
 
+struct RageSoundParams;
 class TimingData;
 class Screen;
 class RageSound;
@@ -80,13 +81,19 @@ class GameSoundManager : MessageSubscriber
 	// Meant to avoid blocking the game execution (stutter)
 	void SetSoundPosition(RageSound* s, float fSeconds);
 
+	void SetPlayingMusicParams(RageSoundParams p);
+
+	const RageSoundParams& GetPlayingMusicParams();
+
 	void StartMusic(MusicToPlay& ToPlay);
 	void DoPlayOnce(std::string sPath);
 	void StartQueuedSounds();
 	void DoPlayOnceFromDir(std::string sPath);
 	auto SoundWaiting() -> bool;
 	void HandleSetPosition();
 
+	void HandleSetParams();
+
 	std::shared_ptr<LuaReference> soundPlayCallback;
 	unsigned int recentPCMSamplesBufferSize = 1024;
 	Screen* callbackOwningScreen{ nullptr };