Make XA Audio play

Library/Code/src/Audio/XAAudio.cpp

@@ -0,0 +1,94 @@
+#include "XAAudio.h"
+#include <STDDEF.H>
+#include <LIBSND.H>
+
+namespace XAAudio
+{
+	static constexpr int BigSectorSize = 2340;
+
+	static CdlCB  oldCallback = nullptr;
+	static CdlLOC curLoc;
+	static int    curChannel;
+
+	static u_char buffer[(sizeof(u_long)*8)];
+
+	static u_short getChannel(u_char *buffer)
+	{
+		const u_short currentChannel = *((unsigned short *)(buffer + 12) + 1);
+		return ((currentChannel&31744) >> 10);
+	}
+
+	static u_short getID(u_char *buffer)
+	{
+		return *(u_short*)(buffer + 12);
+	}
+
+	void cbready(int intr, u_char *result)
+	{
+		static const u_short VideoFrameID = 352;
+
+		if(intr == CdlDataReady)
+		{
+			CdGetSector((u_long*)buffer, 8); 
+			
+			const u_short ID         = getID(buffer);
+			const u_short actChannel = getChannel(buffer);
+
+			if((ID == VideoFrameID) &&  (actChannel == curChannel))
+			{
+				CdControlF(CdlReadS, (u_char*)&curLoc);
+			}
+		}
+	}
+
+	void enable(bool doubleSpeed)
+	{
+		// setup the XA playback - adjust the speed as needed by your XA samples
+		u_char param[4];
+
+		param[0] = (((doubleSpeed) ? CdlModeSpeed : 0x0)|CdlModeRT|CdlModeSF|CdlModeSize1);
+
+		CdControlB(CdlSetmode, param, 0);
+		CdControlF(CdlPause, 0);
+
+		oldCallback = CdReadyCallback((CdlCB)cbready);
+	}
+
+	void disable()
+	{
+		// reset any callback that we replaced
+		CdControlF(CdlPause, 0);
+		CdReadyCallback(oldCallback);
+
+		// clear XA mode
+		u_char param = 0x0;
+		CdControlB(CdlSetmode, &param, 0);
+	}
+
+	void play(const CdlLOC &file, int channel)
+	{
+		CdlFILTER theFilter;
+
+		curLoc     = file;
+		curChannel = channel;
+
+		// set the volume to max
+		SsSetSerialVol(SS_SERIAL_A, 127, 127);
+
+		// set up the XA filter
+		theFilter.file = 1;
+		theFilter.chan = channel;
+		CdControlF(CdlSetfilter, (u_char*)&theFilter);
+
+		// begin playing
+		CdControlF(CdlReadS, (u_char*)&file);
+	}
+
+	CdlLOC locate(const char* fileName)
+	{
+		CdlFILE file = {0};
+
+		CdSearchFile(&file, const_cast<char*>(fileName));
+		return file.pos;
+	}
+}