warzone2100/lib/sound/audio.c

//*
//
#include <stdio.h>
#include "lib/framework/frame.h"
#include "lib/gamelib/gtime.h"
#include "tracklib.h"
#include "lib/gamelib/priority.h"
#include "aud.h"
#include "lib/framework/trig.h"

//*
//
// defines
#define NO_SAMPLE				- 2
#define AUDIO_SAMPLE_HEAP_INIT	1000
#define AUDIO_SAMPLE_HEAP_EXT	10
#define MAX_SAME_SAMPLES		2
#define AUDIO_QUEUE_SIZE		30
#define LOWERED_VOL				AUDIO_VOL_MAX / 4

//*
//

//
// -----------------------------------------------------------------------------------------------------------------------
// *  structs
// -----------------------------------------------------------------------------------------------------------------------
//
typedef struct	SDWVEC3D
{
	SDWORD	x, y, z;
} SDWVEC3D;

//*
//
// externs
//*
//
// static functions
//*
//
// global variables
static OBJ_HEAP		*g_psSampleHeap = NULL;
static AUDIO_SAMPLE *g_psSampleList = NULL;
static AUDIO_SAMPLE *g_psSampleQueue = NULL;
static BOOL			g_bAudioEnabled = FALSE;
static BOOL			g_bAudioPaused = FALSE;
static BOOL			g_bStopAll = FALSE;
static AUDIO_SAMPLE g_sPreviousSample =
{
	NO_SAMPLE, SAMPLE_COORD_INVALID, SAMPLE_COORD_INVALID, SAMPLE_COORD_INVALID
};
static SDWORD		g_i3DVolume = AUDIO_VOL_MAX;

// ifdef WIN32 //Not needed ?--Qamly
//
// static CRITICAL_SECTION critSecAudio;
//
// endif

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_Disabled( void )
{
	return !g_bAudioEnabled;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_Init( AUDIO_CALLBACK pStopTrackCallback )
{
	// init audio system
	g_bAudioEnabled = sound_Init(MAX_SAME_SAMPLES);
	if (g_bAudioEnabled)
	{
		// allocate sample heap
		if ( !HEAP_CREATE(&g_psSampleHeap, AUDIO_SAMPLE_HEAP_INIT, AUDIO_SAMPLE_HEAP_EXT, sizeof(AUDIO_SAMPLE)) )
		{
			debug( LOG_ERROR, "audio_Init: couldn't create sample queue\n" );
			abort();
			return FALSE;
		}

		sound_SetStoppedCallback( pStopTrackCallback );
	}
	return g_bAudioEnabled;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_Shutdown( void )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL, *psSampleTemp = NULL;
	BOOL			bOK;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return TRUE;
	}

	sound_StopAll();
	bOK = sound_Shutdown();

	// empty sample heap
	// ifdef WIN32 //Not needed ?--Qamly
	//
	// EnterCriticalSection( &critSecAudio );
	//
	// endif
	// empty sample list
	psSample = g_psSampleList;
	while ( psSample != NULL )
	{
		psSampleTemp = psSample->psNext;
		HEAP_FREE( g_psSampleHeap, psSample );
		psSample = psSampleTemp;
	}

	// empty sample queue
	psSample = g_psSampleQueue;
	while ( psSample != NULL )
	{
		psSampleTemp = psSample->psNext;
		HEAP_FREE( g_psSampleHeap, psSample );
		psSample = psSampleTemp;
	}

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// LeaveCriticalSection( &critSecAudio );
	//
	// endif
	// free sample heap
	HEAP_DESTROY( g_psSampleHeap );
	g_psSampleHeap = NULL;
	g_psSampleList = NULL;
	g_psSampleQueue = NULL;

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// DeleteCriticalSection( &critSecAudio );
	//
	// endif
	return bOK;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_PlayPreviousQueueTrack( void )
{
	if ( g_sPreviousSample.iTrack != NO_SAMPLE )
	{
		audio_PlayTrack( g_sPreviousSample.iTrack );
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_GetPreviousQueueTrackPos( SDWORD *iX, SDWORD *iY, SDWORD *iZ )
{
	if ( g_sPreviousSample.x != SAMPLE_COORD_INVALID && g_sPreviousSample.y != SAMPLE_COORD_INVALID
	 && g_sPreviousSample.z != SAMPLE_COORD_INVALID )
	{
		*iX = g_sPreviousSample.x;
		*iY = g_sPreviousSample.y;
		*iZ = g_sPreviousSample.z;
		return TRUE;
	}
	else
	{
		*iX = *iY = *iZ;
		return FALSE;
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static void audio_AddSampleToHead( AUDIO_SAMPLE **ppsSampleList, AUDIO_SAMPLE *psSample )
{
	// ifdef WIN32 //Not needed ?--Qamly
	//
	// EnterCriticalSection( &critSecAudio );
	//
	// endif
	psSample->psNext = ( *ppsSampleList );
	psSample->psPrev = NULL;
	if ( (*ppsSampleList) != NULL )
	{
		( *ppsSampleList )->psPrev = psSample;
	}
	( *ppsSampleList ) = psSample;

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// LeaveCriticalSection( &critSecAudio );
	//
	// endif
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static void audio_AddSampleToTail( AUDIO_SAMPLE **ppsSampleList, AUDIO_SAMPLE *psSample )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSampleTail = NULL;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// EnterCriticalSection( &critSecAudio );
	//
	// endif
	if ( (*ppsSampleList) == NULL )
	{
		( *ppsSampleList ) = psSample;
	}
	else
	{
		psSampleTail = ( *ppsSampleList );
		while ( psSampleTail->psNext != NULL )
		{
			psSampleTail = psSampleTail->psNext;
		}

		psSampleTail->psNext = psSample;
		psSample->psPrev = psSampleTail;
		psSample->psNext = NULL;
	}

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// LeaveCriticalSection( &critSecAudio );
	//
	// endif
}

//*
//
// audio_RemoveSample Removes sample from list but doesn't free its memory

//*
// =======================================================================================================================
// =======================================================================================================================
//
static void audio_RemoveSample( AUDIO_SAMPLE **ppsSampleList, AUDIO_SAMPLE *psSample )
{
	if ( psSample == NULL )
	{
		return;
	}

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// EnterCriticalSection( &critSecAudio );
	//
	// endif
	if ( psSample == (*ppsSampleList) )
	{
		// first sample in list
		( *ppsSampleList ) = psSample->psNext;
	}
	else
	{
		if ( psSample->psPrev != NULL )
		{
			psSample->psPrev->psNext = psSample->psNext;
		}

		if ( psSample->psNext != NULL )
		{
			psSample->psNext->psPrev = psSample->psPrev;
		}
	}

	// set sample pointers NULL for safety
	psSample->psPrev = NULL;
	psSample->psNext = NULL;

	// ifdef WIN32 //Not needed ?--Qamly
	//
	// LeaveCriticalSection( &critSecAudio );
	//
	// endif
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static BOOL audio_CheckSameQueueTracksPlaying( SDWORD iTrack )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	SDWORD			iCount;
	AUDIO_SAMPLE	*psSample = NULL;
	BOOL			bOK = TRUE;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return TRUE;
	}

	iCount = 0;

	// loop through queue sounds and check whether too many already in it
	psSample = g_psSampleQueue;
	while ( psSample != NULL )
	{
		if ( psSample->iTrack == iTrack )
		{
			iCount++;
		}

		if ( iCount > MAX_SAME_SAMPLES )
		{
			bOK = FALSE;
			break;
		}

		psSample = psSample->psNext;
	}

	return bOK;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static AUDIO_SAMPLE *audio_QueueSample( SDWORD iTrack )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	//
	// SDWORD iSameSamples = 0;
	//
//	debug(LOG_SOUND, "audio_queuesample called - track=%d", iTrack );

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE || g_bStopAll == TRUE )
	{
		return NULL;
	}

	ASSERT( sound_CheckTrack(iTrack) == TRUE, "audio_QueueSample: track %i outside limits\n", iTrack );

	// reject track if too many of same ID already in queue
	if ( audio_CheckSameQueueTracksPlaying(iTrack) == FALSE )
	{
		return NULL;
	}

//	debug(LOG_SOUND, "audio_queuetrack called1" );
	HEAP_ALLOC( g_psSampleHeap, (void **) &psSample );
	if ( psSample != NULL )
	{
		memset( psSample, 0, sizeof(AUDIO_SAMPLE) );		//[check] -Q
		psSample->iTrack = iTrack;
		psSample->x = SAMPLE_COORD_INVALID;
		psSample->y = SAMPLE_COORD_INVALID;
		psSample->z = SAMPLE_COORD_INVALID;
		psSample->bRemove = FALSE;

		// add to queue
		audio_AddSampleToTail( &g_psSampleQueue, psSample );
	}

	return psSample;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_QueueTrack( SDWORD iTrack )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE || g_bStopAll == TRUE )
	{
		return;
	}

	psSample = audio_QueueSample( iTrack );
}

//*
//
//
// * audio_QueueTrackMinDelay Will only play track if iMinDelay has elapsed since
// * track last finished
//

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_QueueTrackMinDelay( SDWORD iTrack, UDWORD iMinDelay )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	UDWORD			iDelay;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return;
	}

	iDelay = sound_GetGameTime() - sound_GetTrackTimeLastFinished( iTrack );
	if ( iDelay > iMinDelay )
	{
		psSample = audio_QueueSample( iTrack );
		if ( psSample != NULL )
		{
			sound_SetTrackTimeLastFinished( iTrack, sound_GetGameTime() );
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_QueueTrackMinDelayPos( SDWORD iTrack, UDWORD iMinDelay, SDWORD iX, SDWORD iY, SDWORD iZ )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	UDWORD			iDelay;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return;
	}

	iDelay = sound_GetGameTime() - sound_GetTrackTimeLastFinished( iTrack );
	if ( iDelay > iMinDelay )
	{
		psSample = audio_QueueSample( iTrack );
		if ( psSample != NULL )
		{
			sound_SetTrackTimeLastFinished( iTrack, sound_GetGameTime() );
			psSample->x = iX;
			psSample->y = iY;
			psSample->z = iZ;
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_QueueTrackPos( SDWORD iTrack, SDWORD iX, SDWORD iY, SDWORD iZ )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return;
	}

	psSample = audio_QueueSample( iTrack );
	if ( psSample != NULL )
	{
		psSample->x = iX;
		psSample->y = iY;
		psSample->z = iZ;
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static void audio_UpdateQueue( void )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample = NULL;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return;
	}

	if ( sound_QueueSamplePlaying() == TRUE )
	{
		// lower volume whilst playing queue audio
		audio_Set3DVolume( LOWERED_VOL );
	}
	else
	{
		// set full global volume
		audio_Set3DVolume( AUDIO_VOL_MAX );

		// check queue for members
		if ( g_psSampleQueue != NULL )
		{
			// remove queue head
			psSample = g_psSampleQueue;
			audio_RemoveSample( &g_psSampleQueue, psSample );

			// add sample to list if able to play
			if ( sound_Play2DTrack(psSample, TRUE) == TRUE )
			{
				audio_AddSampleToHead( &g_psSampleList, psSample );

				// update last queue sound coords
				if ( psSample->x != SAMPLE_COORD_INVALID && psSample->y != SAMPLE_COORD_INVALID
				 && psSample->z != SAMPLE_COORD_INVALID )
				{
					g_sPreviousSample.x = psSample->x;
					g_sPreviousSample.y = psSample->y;
					g_sPreviousSample.z = psSample->z;
				}
			}
			else
			{
				debug( LOG_NEVER, "audio_UpdateQueue: couldn't play sample\n" );
				HEAP_FREE( g_psSampleHeap, psSample );
			}
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_Update( void )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	SDWVEC3D		vecPlayer;
	SDWORD			iA;
	AUDIO_SAMPLE	*psSample, *psSampleTemp;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return TRUE;
	}

	audio_UpdateQueue();

	// get player position
	if ( audio_Display3D() == TRUE )
	{
		audio_Get3DPlayerPos( &vecPlayer.x, &vecPlayer.y, &vecPlayer.z );
	}
	else
	{
		audio_Get2DPlayerPos( &vecPlayer.x, &vecPlayer.y, &vecPlayer.z );
	}

	sound_SetPlayerPos( vecPlayer.x, vecPlayer.y, vecPlayer.z );
	audio_Get3DPlayerRotAboutVerticalAxis( &iA );
	sound_SetPlayerOrientation( 0, 0, iA );

	// loop through 3D sounds and remove if finished or update position
	psSample = g_psSampleList;
	while ( psSample != NULL )
	{
		// remove finished samples from list
		if ( psSample->bRemove == TRUE )
		{
			audio_RemoveSample( &g_psSampleList, psSample );
			psSampleTemp = psSample->psNext;
			HEAP_FREE( g_psSampleHeap, psSample );
			psSample = psSampleTemp;
		}

		// check looping sound callbacks for finished condition
		else
		{
			if ( psSample->psObj != NULL )
			{
				if ( audio_ObjectDead(psSample->psObj)
				 || (psSample->pCallback != NULL && (psSample->pCallback) (psSample) == FALSE) )
				{
					sound_StopTrack( psSample );
					psSample->psObj = NULL;
				}
				else
				{
					// update sample position
					{
						audio_GetObjectPos( psSample->psObj, &psSample->x, &psSample->y, &psSample->z );
						sound_SetObjectPosition( psSample->iSample, psSample->x, psSample->y, psSample->z );
					}
				}
			}

			// next sample
			psSample = psSample->psNext;
		}
	}

	sound_Update();
	return TRUE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_LoadTrackFromFile( char szFileName[] )
{
	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return TRUE;
	}

	return sound_LoadTrackFromFile( szFileName );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
TRACK *audio_LoadTrackFromBuffer(char *pBuffer, UDWORD udwSize)
{
	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return NULL;
	}

	return sound_LoadTrackFromBuffer( pBuffer, udwSize );
}

//*
//

// Routine to convert wav filename into a track number
// ... This is really not going to be practical on the PSX is it?
//
// What is the point of all the scripts storing .WAV file names like: "Incoming
// Intelligence Report-22hz Mon.wav"
//
//
// when all that is required is a single byte saying which sound effect is
// required.
//
// A typical example of using 50 times the amount of memory that is needed.

//
// =======================================================================================================================
// *  ... bloody PC programmers they're spoiled !
// =======================================================================================================================
//
BOOL audio_SetTrackVals
	(
		char	szFileName[],
		BOOL	bLoop,
		int		*piID,
		int		iVol,
		int		iPriority,
		int		iAudibleRadius,
		int		VagID
	)
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	//~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return TRUE;
	}

	// get track pointer from resource
	psTrack = (TRACK*)resGetData( "WAV", szFileName );		//at this point we have 4 valid entries, and 8 invalid -Q
	if ( psTrack == NULL )
	{
		debug( LOG_NEVER, "audio_SetTrackVals: track %s resource not found\n", szFileName );
		return FALSE;
	}
	else
	{
		// get current ID or spare one
		if ( audio_GetIDFromStr(szFileName, piID) == FALSE )
		{
			*piID = sound_GetAvailableID();
		}

		if ( *piID == SAMPLE_NOT_ALLOCATED )
		{
			debug( LOG_NEVER, "audio_SetTrackVals: couldn't get spare track ID\n" );
			return FALSE;
		}
		else
		{
			return sound_SetTrackVals( psTrack, bLoop, *piID, iVol, iPriority, iAudibleRadius, VagID );	//now psTrack should be fully set. -Q
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_SetTrackValsHashName
	(
		UDWORD	hash,
		BOOL	bLoop,
		int		iTrack,
		int		iVol,
		int		iPriority,
		int		iAudibleRadius,
		int		VagID
	)
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	//~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return TRUE;
	}

	// get track pointer from resource
	psTrack = (TRACK*)resGetDataFromHash( "WAV", hash );
	if ( psTrack == NULL )
	{
		return FALSE;
	}
	else
	{
		return sound_SetTrackVals( psTrack, bLoop, iTrack, iVol, iPriority, iAudibleRadius, VagID );
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_ReleaseTrack( TRACK *psTrack )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	sound_ReleaseTrack( psTrack );
}

//*
//
//
// * audio_CheckSame3DTracksPlaying Reject samples if too many already playing in
// * same area
//

//*
// =======================================================================================================================
// =======================================================================================================================
//
static BOOL audio_CheckSame3DTracksPlaying( SDWORD iTrack, SDWORD iX, SDWORD iY, SDWORD iZ )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	SDWORD			iCount, iDx, iDy, iDz, iDistSq, iMaxDistSq, iRad;
	AUDIO_SAMPLE	*psSample = NULL;
	BOOL			bOK = TRUE;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE )
	{
		return TRUE;
	}

	iCount = 0;

	// loop through 3D sounds and check whether too many already in earshot
	psSample = g_psSampleList;
	while ( psSample != NULL )
	{
		if ( psSample->iTrack == iTrack )
		{
			iDx = iX - psSample->x;
			iDy = iY - psSample->y;
			iDz = iZ - psSample->z;
			iDistSq = ( iDx * iDx ) + ( iDy * iDy ) + ( iDz * iDz );
			iRad = sound_GetTrackAudibleRadius( iTrack );
			iMaxDistSq = iRad * iRad;
			if ( iDistSq < iMaxDistSq )
			{
				iCount++;
			}

			if ( iCount > MAX_SAME_SAMPLES )
			{
				bOK = FALSE;
				break;
			}
		}

		psSample = psSample->psNext;
	}

	return bOK;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static BOOL audio_Play3DTrack( SDWORD iX, SDWORD iY, SDWORD iZ, int iTrack, void *psObj, AUDIO_CALLBACK pUserCallback )
{
	//~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample;
	//~~~~~~~~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE || g_bStopAll == TRUE )
	{
		return FALSE;
	}

	if ( audio_CheckSame3DTracksPlaying(iTrack, iX, iY, iZ) == FALSE )
	{
		return FALSE;
	}

	HEAP_ALLOC( g_psSampleHeap, (void **) &psSample );
	if ( psSample == NULL )
	{
		return FALSE;
	}
	else
	{
		// setup sample
		memset( psSample, 0, sizeof(AUDIO_SAMPLE) );						// [check] -Q
		psSample->iTrack = iTrack;
		psSample->x = iX;
		psSample->y = iY;
		psSample->z = iZ;
		psSample->bRemove = FALSE;
		psSample->psObj = psObj;
		psSample->pCallback = pUserCallback;

		// add sample to list if able to play
		if ( sound_Play3DTrack(psSample) == TRUE )
		{
			audio_AddSampleToHead( &g_psSampleList, psSample );
			return TRUE;
		}
		else
		{
			debug( LOG_NEVER, "audio_Play3DTrack: couldn't play sample\n" );
			HEAP_FREE( g_psSampleHeap, psSample );
			return FALSE;
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_PlayStaticTrack( SDWORD iMapX, SDWORD iMapY, int iTrack )
{
	//~~~~~~~~~~~~~~~
	SDWORD	iX, iY, iZ;
	//~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return FALSE;
	}

	audio_GetStaticPos( iMapX, iMapY, &iX, &iY, &iZ );
	return audio_Play3DTrack( iX, iY, iZ, iTrack, NULL, NULL );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_PlayObjStaticTrack( void *psObj, int iTrack )
{
	//~~~~~~~~~~~~~~~
	SDWORD	iX, iY, iZ;
	//~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return FALSE;
	}

	audio_GetObjectPos( psObj, &iX, &iY, &iZ );
	return audio_Play3DTrack( iX, iY, iZ, iTrack, psObj, NULL );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_PlayObjStaticTrackCallback( void *psObj, int iTrack, AUDIO_CALLBACK pUserCallback )
{
	//~~~~~~~~~~~~~~~
	SDWORD	iX, iY, iZ;
	//~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return FALSE;
	}

	audio_GetObjectPos( psObj, &iX, &iY, &iZ );
	return audio_Play3DTrack( iX, iY, iZ, iTrack, psObj, pUserCallback );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_PlayObjDynamicTrack( void *psObj, int iTrack, AUDIO_CALLBACK pUserCallback )
{
	//~~~~~~~~~~~~~~~
	SDWORD	iX, iY, iZ;
	//~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return FALSE;
	}

	audio_GetObjectPos( psObj, &iX, &iY, &iZ );
	return audio_Play3DTrack( iX, iY, iZ, iTrack, psObj, pUserCallback );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL audio_PlayStream( char szFileName[], SDWORD iVol, AUDIO_CALLBACK pUserCallback )
{
	//~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample;
	//~~~~~~~~~~~~~~~~~~~~~~

	// if audio not enabled return TRUE to carry on game without audio
	if ( g_bAudioEnabled == FALSE )
	{
		return FALSE;
	}

	HEAP_ALLOC( g_psSampleHeap, (void **) &psSample );
	if ( psSample != NULL )
	{
		memset( psSample, 0, sizeof(AUDIO_SAMPLE) );
		psSample->pCallback = pUserCallback;
		psSample->bRemove = FALSE;
		audio_Set3DVolume( AUDIO_VOL_MAX );
		if ( sound_PlayStream(psSample, szFileName, iVol) == TRUE )
		{
			return TRUE;
		}
	}

	return FALSE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_StopObjTrack( void *psObj, int iTrack )
{
	//~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample;
	//~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bStopAll == TRUE )
	{
		return;
	}

	// find sample
	psSample = g_psSampleList;
	while ( psSample != NULL )
	{
		if ( psSample->psObj == psObj && psSample->iTrack == iTrack )
		{
			break;
		}

		// get next sample from hash table
		psSample = psSample->psNext;
	}

	if ( psSample != NULL )
	{
		sound_StopTrack( psSample );
	}
}

//*
//
// audio_PlayTrack Play immediate 2D FX track

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_PlayTrack( int iTrack )
{
	//~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample;
	//~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE || g_bAudioPaused == TRUE || g_bStopAll == TRUE )
	{
		return;
	}

	HEAP_ALLOC( g_psSampleHeap, (void **) &psSample );
	if ( psSample != NULL )
	{
		// setup sample
		memset( psSample, 0, sizeof(AUDIO_SAMPLE) );	  // Set everything to 0  (looks good) -Q
		psSample->iTrack = iTrack;
		psSample->bRemove = FALSE;

		// add sample to list if able to play
		if ( sound_Play2DTrack(psSample, FALSE) == TRUE )
		{
			audio_AddSampleToHead( &g_psSampleList, psSample );
		}
		else
		{
			debug( LOG_NEVER, "audio_PlayTrack: couldn't play sample\n" );
			HEAP_FREE( g_psSampleHeap, psSample );
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_StopTrack( int iTrack )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	//
	// iTrack;
	//
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_SetTrackPan( int iTrack, int iPan )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	//
	// iTrack;
	//
	//
	// iPan;
	//
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_SetTrackVol( int iTrack, int iVol )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	//
	// iTrack;
	//
	//
	// iVol;
	//
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_SetTrackFreq( int iTrack, int iFreq )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	//
	// iTrack;
	//
	//
	// iFreq;
	//
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_PauseAll( void )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	g_bAudioPaused = TRUE;
	sound_PauseAll();
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_ResumeAll( void )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	g_bAudioPaused = FALSE;
	sound_ResumeAll();
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_StopAll( void )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	AUDIO_SAMPLE	*psSample, *psSampleTemp;
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return;
	}

	debug( LOG_NEVER, "audio_StopAll called\n" );
	g_bStopAll = TRUE;

	//
	// * empty list - audio_Update will free samples because callbacks have to come in
	// * first
	//
	psSample = g_psSampleList;
	while ( psSample != NULL )
	{
		sound_StopTrack( psSample );
		psSample = psSample->psNext;
	}

	// empty sample queue
	psSample = g_psSampleQueue;
	while ( psSample != NULL )
	{
		psSampleTemp = psSample->psNext;
		HEAP_FREE( g_psSampleHeap, psSample );
		psSample = psSampleTemp;
	}

	g_psSampleQueue = NULL;
	g_bStopAll = FALSE;
	debug( LOG_NEVER, "audio_StopAll done\n" );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_CheckAllUnloaded( void )
{
	sound_CheckAllUnloaded();
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_GetTrackID( char szFileName[] )
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	SDWORD	iID;
	//~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return SAMPLE_NOT_FOUND;
	}
	else
	{
		psTrack = (TRACK*)resGetData( "WAV", szFileName );
		if ( psTrack == NULL )
		{
			return SAMPLE_NOT_FOUND;
		}
		else
		{
			iID = sound_GetTrackID( psTrack );
			return iID;
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_GetTrackIDFromHash( UDWORD hash )
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	SDWORD	iID;
	//~~~~~~~~~~~~~

	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return SAMPLE_NOT_FOUND;
	}
	else
	{
		psTrack = (TRACK*)resGetDataFromHash( "WAV", hash );
		if ( psTrack == NULL )
		{
			return SAMPLE_NOT_FOUND;
		}
		else
		{
			iID = sound_GetTrackID( psTrack );
			return iID;
		}
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_GetAvailableID( void )
{
	// return if audio not enabled
	if ( g_bAudioEnabled == FALSE )
	{
		return 0;
	}
	else
	{
		return sound_GetAvailableID();
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_Get3DVolume( void )
{
	return g_i3DVolume;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void audio_Set3DVolume( SDWORD iVol )
{
	g_i3DVolume = iVol;
}

//*
//
// audio_GetMixVol iVol and audio_Get3DVolume need to be scaled by AUDIO_VOL_RANGE

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_GetMixVol( SDWORD iVol )
{
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	SDWORD	iMixVol = ( iVol * sound_GetMaxVolume() * audio_Get3DVolume() ) / ( AUDIO_VOL_RANGE * AUDIO_VOL_RANGE );
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	return iMixVol;
}

//*
//
//
// * audio_GetSampleMixVol iVol, audio_Get3DVolume and sound_GetTrackVolume all need
// * to be scaled by AUDIO_VOL_RANGE
//

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD audio_GetSampleMixVol( AUDIO_SAMPLE *psSample, SDWORD iVol, BOOL bScale3D )
{
	//~~~~~~~~~~~~
	SDWORD	iMixVol;
	//~~~~~~~~~~~~

	iMixVol = iVol * sound_GetMaxVolume() / AUDIO_VOL_RANGE;
	iMixVol = iMixVol * sound_GetTrackVolume( psSample->iTrack ) / AUDIO_VOL_RANGE;
	if ( bScale3D )
	{
		iMixVol = iMixVol * audio_Get3DVolume() / AUDIO_VOL_RANGE;
	}

	return iMixVol;
}

//*
//