Add game pause detection to OpenAL music system

Author: sabianroberts

cl_dll/audio/openal_wav.cpp

@@ -431,6 +431,32 @@ void CSoundtrackSystem::Update()
     // otherwise: stop
 }
 
+void CSoundtrackSystem::PauseMusic()
+{
+    if (m_paused)
+        return;
+
+    ALint state;
+    alGetSourcei(m_source, AL_SOURCE_STATE, &state);
+
+    if (state == AL_PLAYING)
+    {
+        m_paused = true;
+        alSourcePause(m_source);
+        gEngfuncs.Con_Printf("MUSIC PAUSED\n");
+    }
+}
+
+void CSoundtrackSystem::ResumeMusic()
+{
+    if (!m_paused)
+        return;
+
+    m_paused = false;
+    alSourcePlay(m_source);
+    gEngfuncs.Con_Printf("MUSIC RESUMED\n");
+}
+
 CON_COMMAND(soundtrack_play, "file.ext [loop]")
 {
     if (!g_SoundtrackSystem.Init())

cl_dll/audio/openal_wav.h

@@ -43,6 +43,9 @@ class CSoundtrackSystem
 	void Shutdown();
 	void Update();
 
+	void PauseMusic();
+	void ResumeMusic();
+
 	void Queue(const std::string& filename, bool loop = false);
 
 	ALuint m_source = 0;
@@ -60,6 +63,8 @@ class CSoundtrackSystem
 	ALCdevice* m_device = nullptr;
 	ALCcontext* m_context = nullptr;
 	ALuint m_buffer = 0;
+
+	bool m_paused = false;
 };
 
 extern CSoundtrackSystem g_SoundtrackSystem;

cl_dll/cl_util.h

@@ -287,4 +287,6 @@ HSPRITE LoadSprite(const char *pszName);
 
 // frac should always be multiplied by frametime
 float lerp(float start, float end, float frac);
-double dlerp(double start, double end, double frac);
+double dlerp(double start, double end, double frac);
+
+inline bool g_Paused = false;

cl_dll/gameui/gameui_viewport.cpp

@@ -47,7 +47,6 @@ CGameUIViewport::CGameUIViewport() : BaseClass(nullptr, "ClientGameUIViewport")
 {
 	Assert(!m_sInstance);
 	m_sInstance = this;
-
 	vgui2::VPANEL parent = g_pEngineVGui->GetPanel(PANEL_GAMEUIDLL);
 	SetParent(parent);
 

cl_dll/view.cpp

@@ -22,6 +22,7 @@
 #include "hltv.h"
 #include "Exports.h"
 #include "Platform.h"
+#include "audio/openal_wav.h"
 #include <pm_shared.h>
 
 
@@ -1275,6 +1276,13 @@ void V_CalcNormalRefdef(struct ref_params_s* pparams)
 	}
 
 	v_origin = pparams->vieworg;
+
+	g_Paused = pparams->paused != 0;
+
+	if (g_Paused)
+		g_SoundtrackSystem.PauseMusic();
+	else
+		g_SoundtrackSystem.ResumeMusic();
 }
 
 void V_SmoothInterpolateAngles(float* startAngle, float* endAngle, float* finalAngle, float degreesPerSec)