DoomRTX/neo/engine/sys/win32/win_snd.cpp

/*
===========================================================================

IceTech GPL Source Code
Copyright (C) 2026 Justin Marshall

===========================================================================
*/
#include "precompiled.h"
#pragma hdrstop

#include "../../sound/snd_local.h"
#include "win_local.h"

#include "../../openal/idal.cpp"

/*
===============
idAudioHardwareWIN32

OpenAL owns the Windows playback device. The sound system still asks for an
idAudioHardware object so shared mixer timing and speaker-count code can run.
===============
*/
class idAudioHardwareWIN32 : public idAudioHardware {
public:
	idAudioHardwareWIN32() {
		numSpeakers = idSoundSystemLocal::s_numberOfSpeakers.GetInteger();
		if ( numSpeakers != 6 ) {
			numSpeakers = 2;
		}
	}

	virtual bool Initialize() { return true; }
	virtual bool Lock( void **pDSLockedBuffer, ulong *dwDSLockedBufferSize ) {
		*pDSLockedBuffer = NULL;
		*dwDSLockedBufferSize = 0;
		return false;
	}
	virtual bool Unlock( void *pDSLockedBuffer, dword dwDSLockedBufferSize ) { return false; }
	virtual bool GetCurrentPosition( ulong *pdwCurrentWriteCursor ) {
		*pdwCurrentWriteCursor = 0;
		return false;
	}
	virtual bool Flush( void ) { return true; }
	virtual void Write( bool flushing ) {}
	virtual int GetNumberOfSpeakers( void ) { return numSpeakers; }
	virtual int GetMixBufferSize( void ) { return MIXBUFFER_SAMPLES * numSpeakers * sizeof( short ); }
	virtual short *GetMixBuffer( void ) { return NULL; }

private:
	int numSpeakers;
};

idAudioHardware *idAudioHardware::Alloc() { return new idAudioHardwareWIN32; }
idAudioHardware::~idAudioHardware() {}

static HMODULE hOpenAL = NULL;

/*
===============
Sys_LoadOpenAL
===============
*/
bool Sys_LoadOpenAL( void ) {
	const char *sym;

	if ( hOpenAL ) {
		return true;
	}

	hOpenAL = LoadLibraryA( idSoundSystemLocal::s_libOpenAL.GetString() );
	if ( !hOpenAL ) {
		common->Warning( "LoadLibrary %s failed.", idSoundSystemLocal::s_libOpenAL.GetString() );
		return false;
	}
	if ( ( sym = InitializeIDAL( hOpenAL ) ) ) {
		common->Warning( "GetProcAddress %s failed.", sym );
		FreeLibrary( hOpenAL );
		hOpenAL = NULL;
		return false;
	}
	return true;
}

/*
===============
Sys_FreeOpenAL
===============
*/
void Sys_FreeOpenAL( void ) {
	if ( hOpenAL ) {
		FreeLibrary( hOpenAL );
		hOpenAL = NULL;
	}
}