Adding SetVolume function.

sonicretro · Apr 4, 2015 · 64d7403 · 64d7403
1 parent 8568f23
commit 64d7403
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/SMPSOUT/SMPSOUT.cpp b/SMPSOUT/SMPSOUT.cpp
@@ -34,6 +34,7 @@ extern "C"
 	extern UINT32 SampleRate;	// from Sound.c
 	extern UINT16 FrameDivider;
 	extern UINT32 SmplsPerFrame;
+	double VolumeLevel = 1;
 
 	__declspec(dllexport) BOOL PlaySega();
 	__declspec(dllexport) BOOL StopSega();
@@ -1407,6 +1408,11 @@ extern "C"
 		return PlaySound(NULL, NULL, SND_ASYNC);
 	}
 
+	__declspec(dllexport) void SetVolume(double volume)
+	{
+		VolumeLevel = volume;
+	}
+
 	void NotifySongStopped()
 	{
 		if (EnableSKCHacks)

diff --git a/SMPSOUT/Sound.c b/SMPSOUT/Sound.c
@@ -6,7 +6,7 @@
 #include "Engine/smps.h"
 #include "Engine/dac.h"
 
-
+extern double VolumeLevel;
 
 typedef void (*strm_func)(UINT8 ChipID, stream_sample_t **outputs, int samples);
 
@@ -493,6 +493,8 @@ UINT32 FillBuffer(WAVE_16BS* Buffer, UINT32 BufferSize)
 
 		TempBuf.Left = TempBuf.Left >> 7;
 		TempBuf.Right = TempBuf.Right >> 7;
+		TempBuf.Left = (int)(TempBuf.Left * VolumeLevel);
+		TempBuf.Right = (int)(TempBuf.Right * VolumeLevel);
 		Buffer[CurSmpl].Left = Limit2Short(TempBuf.Left);
 		Buffer[CurSmpl].Right = Limit2Short(TempBuf.Right);
 	}