1 files changed, 27 insertions, 0 deletions
diff --git a/src/chips/mame/opl.h b/src/chips/mame/opl.h
new file mode 100644
index 0000000..a1d7184
--- /dev/null
+++ b/src/chips/mame/opl.h
@@ -0,0 +1,27 @@
+#ifndef OPL_H
+#define OPL_H
+
+// Abstract base class for OPL emulators
+
+class OPLEmul
+{
+public:
+	OPLEmul() {}
+	virtual ~OPLEmul() {}
+
+	virtual void Reset() = 0;
+	virtual void WriteReg(int reg, int v) = 0;
+	virtual void Update(float *buffer, int length) = 0;
+	virtual void UpdateS(short *buffer, int length) = 0;
+	virtual void SetPanning(int c, float left, float right) = 0;
+};
+
+OPLEmul *YM3812Create(bool stereo);
+
+#define OPL_SAMPLE_RATE			49716.0
+#define CENTER_PANNING_POWER	0.70710678118	/* [RH] volume at center for EQP */
+#define ADLIB_CLOCK_MUL			24.0
+
+
+
+#endif