Hacked in support for the ZDoom emulator.

Source/hiopl.cpp

@@ -3,11 +3,14 @@
 #include <assert.h>
 #include "../JuceLibraryCode/JuceHeader.h"
 
-// A higher level wrapper around the DOSBox OPL emulator.
+// A wrapper around the DOSBox and ZDoom OPL emulators.
 
-Hiopl::Hiopl(int buflen) {
+Hiopl::Hiopl(int buflen, Emulator emulator) {
 	adlib = new DBOPL::Handler();
-	Buf32 = new Bit32s[buflen*2];
+	zdoom = JavaOPLCreate(false);
+
+	this->SetEmulator(emulator);
+
 	_op1offset[1] = 0x0;
 	_op1offset[2] = 0x1;
 	_op1offset[3] = 0x2;
@@ -33,32 +36,21 @@ Hiopl::Hiopl(int buflen) {
 	}
 }
 
-void Hiopl::Generate(int length, short* buffer) {
-	adlib->Generate(length, Buf32);
-	for (int i = 0; i < length; i++) {
-		buffer[i] = (short)(Buf32[i]);
-	}
+void Hiopl::SetEmulator(Emulator emulator) {
+	this->emulator = emulator;
 }
 
 void Hiopl::Generate(int length, float* buffer) {
 	// This would be better done using Juce's built in audio format conversion.
+	if (DOSBOX == emulator) {
 		adlib->Generate(length, Buf32);
 		for (int i = 0; i < length; i++) {
 			buffer[i] = (float)(Buf32[i])/32768.0f;
 		}
-	/*
-	AudioData::ConverterInstance<
-		AudioData::Pointer <AudioData::Int16,
-			AudioData::NativeEndian,
-			AudioData::Interleaved,
-			AudioData::Const>,
-		AudioData::Pointer <AudioData::Float32,
-			AudioData::NativeEndian,
-			AudioData::NonInterleaved,
-			AudioData::NonConst>
-	>converter;
-	converter.convertSamples(buffer, 0, Buf32, 0, length);
-	*/
+	} else if (ZDOOM == emulator) {
+		// ZDoom hacked to write mono samples
+		zdoom->Update(buffer, length);
+	}
 }
 
 void Hiopl::SetSampleRate(int hz) {
@@ -69,7 +61,11 @@ void Hiopl::_WriteReg(Bit32u reg, Bit8u value, Bit8u mask) {
 	if (mask > 0) {
 		value = (regCache[reg] & (~mask)) | (value & mask);
 	}
+	if (DOSBOX == emulator) {
 		adlib->WriteReg(reg, value);
+	} else if (ZDOOM == emulator) {
+		zdoom->WriteReg(reg, value);
+	}
 	regCache[reg] = value;
 }
 

Source/hiopl.h

@@ -2,6 +2,7 @@
 
 #include "adlib.h"
 #include "dbopl.h"
+#include "zdopl.h"
 
 enum Waveform
 {
@@ -13,12 +14,19 @@ enum FreqMultiple
 	xHALF=0, x1=1, x2=2, x3=3, x4=4, x5=5, x6=6, x7=7, x8=8, x9=9, x10=10, x12=12, x15=15
 };
 
+enum Emulator
+{
+	DOSBOX=0, ZDOOM=1
+};
+
 
 class Hiopl {
 	public:
 		static const int CHANNELS = 9;
 		static const int OSCILLATORS = 2;
-		Hiopl(int buflen);
+		Hiopl(int buflen, Emulator emulator=ZDOOM);
+		void Hiopl::SetEmulator(Emulator emulator);
+
 		void Generate(int length, short* buffer);
 		void Generate(int length, float* buffer);
 		void SetSampleRate(int hz);
@@ -51,7 +59,9 @@ class Hiopl {
 		void _ClearRegBits(Bit32u reg, Bit8u mask);
 		~Hiopl();
 	private:
+		Emulator emulator;
 		Adlib::Handler *adlib;
+		OPLEmul *zdoom;
 		Bit8u regCache[256];
 		Bit32s *Buf32;
 		bool _CheckParams(int ch, int osc);

Source/zdopl.h

@@ -0,0 +1,24 @@
+#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 SetPanning(int c, float left, float right) = 0;
+};
+
+OPLEmul *JavaOPLCreate(bool stereo);
+
+#define OPL_SAMPLE_RATE			49716.0
+#define CENTER_PANNING_POWER	0.70710678118	/* [RH] volume at center for EQP */
+
+
+#endif