warzone2100/lib/sound/track.c

/*
	This file is part of Warzone 2100.
	Copyright (C) 1999-2004  Eidos Interactive
	Copyright (C) 2005-2007  Warzone Resurrection Project

	Warzone 2100 is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	Warzone 2100 is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with Warzone 2100; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
//*
//
#include <string.h>
#ifdef WIN32
#include <windows.h>
#endif
#include "lib/framework/frame.h"
#include "lib/framework/frameresource.h"
#include "tracklib.h"
#include "lib/gamelib/priority.h"

//*
//
// defines
#define MAX_TRACKS	( 600 )

//*
//
// static global variables
// array of pointers to sound effects
static TRACK			**g_apTrack;

// number of tracks loaded
static SDWORD			g_iCurTracks = 0;
static SDWORD			g_iSamples = 0;

//
// static SDWORD g_iMaxSamples;
//
static SDWORD			g_iMaxSameSamples;

// flag set when system is active (for callbacks etc)
static BOOL				g_bSystemActive = FALSE;
static AUDIO_CALLBACK	g_pStopTrackCallback = NULL;

//*
//
// Function prototypes
static void sound_CheckSample( AUDIO_SAMPLE *psSample );

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_Init( SDWORD iMaxSameSamples )
{
	//~~~~~~~~~~~~~
	SDWORD	i;
	//~~~~~~~~~~~~~

	g_iMaxSameSamples = iMaxSameSamples;
	g_iCurTracks = 0;
	if ( sound_InitLibrary() == FALSE )
	{
		debug( LOG_NEVER, "Cannot init sound library\n" );
		return FALSE;
	}

	// init audio array
	g_apTrack = (TRACK **) MALLOC( sizeof(TRACK* ) * MAX_TRACKS);
	for ( i = 0; i < MAX_TRACKS; i++ )
	{
		g_apTrack[i] = NULL;
	}

	// set system active flag for callbacks
	g_bSystemActive = TRUE;
	return TRUE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_Shutdown( void )
{
	FREE( g_apTrack );

	// set inactive flag to prevent callbacks coming after shutdown
	g_bSystemActive = FALSE;
	sound_ShutdownLibrary();
	return TRUE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_GetSystemActive( void )
{
	return g_bSystemActive;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_SetTrackVals
	(
		TRACK	*psTrack,
		BOOL	bLoop,
		SDWORD	iTrack,
		SDWORD	iVol,
		SDWORD	iPriority,
		SDWORD	iAudibleRadius
	)
{
	ASSERT( iPriority >= LOW_PRIORITY && iPriority <= HIGH_PRIORITY, "sound_CreateTrack: priority %i out of bounds\n", iPriority );

	// add to sound array
	if ( iTrack < MAX_TRACKS )
	{
		if ( g_apTrack[iTrack] != NULL )
		{
			debug( LOG_ERROR, "sound_SetTrackVals: track %i already set\n", iTrack );
			abort();
			return FALSE;
		}

		// set track members
		psTrack->bLoop = bLoop;
		psTrack->iVol = iVol;
		psTrack->iPriority = iPriority;
		psTrack->iAudibleRadius = iAudibleRadius;
		psTrack->iTime =0;			//added, since they really should init all the values. -Q
		psTrack->iTimeLastFinished = 0;
		psTrack->iNumPlaying = 0;

		// set global
		g_apTrack[iTrack] = psTrack;

		// increment current sound
		g_iCurTracks++;
		return TRUE;
	}

	return FALSE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static BOOL sound_AddTrack( TRACK *pTrack )
{
	// add to sound array
	if ( g_iCurTracks < MAX_TRACKS )
	{
		// set pointer in table
		g_apTrack[g_iCurTracks] = pTrack;

		// increment current sound
		g_iCurTracks++;
		return TRUE;
	}
	else
	{
		debug( LOG_ERROR, "sound_AddTrack: all tracks used: increase MAX_TRACKS\n" );
		abort();
		return FALSE;
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
TRACK *sound_LoadTrackFromBuffer(char *pBuffer, UDWORD udwSize)
{
	//~~~~~~~~~~~~
	TRACK	*pTrack;
	//~~~~~~~~~~~~

	// allocate track
	pTrack = (TRACK *) MALLOC( sizeof(TRACK) );
	memset(pTrack, 0, sizeof(TRACK));
	if ( pTrack == NULL )
	{
		debug( LOG_ERROR, "sound_LoadTrackFromBuffer: couldn't allocate memory\n" );
		abort();
		return NULL;
	}

	pTrack->bMemBuffer = TRUE;

	// Set filename in struct
	pTrack->pName = (char*)MALLOC( strlen(GetLastResourceFilename()) + 1 );
	if ( pTrack->pName == NULL )
	{
		debug( LOG_ERROR, "sound_LoadTrackFromBuffer: couldn't allocate memory\n" );
		abort();
		FREE( pTrack );
		return NULL;
	}
	strcpy( pTrack->pName, GetLastResourceFilename() );

	if ( sound_ReadTrackFromBuffer(pTrack, pBuffer, udwSize) == FALSE )
		return NULL;

	return pTrack;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_LoadTrackFromFile(char szFileName[])
{
	//~~~~~~~~~~~~
	TRACK	*pTrack;
	//~~~~~~~~~~~~

	// allocate track
	pTrack = (TRACK *) MALLOC( sizeof(TRACK) );
	if ( pTrack != NULL )
	{
		pTrack->bMemBuffer = FALSE;
		pTrack->pName = (char*)MALLOC( strlen((char*) szFileName) + 1 );
		if ( pTrack->pName == NULL )
		{
			debug( LOG_ERROR, "sound_LoadTrackFromFile: Out of memory" );
			abort();
			return FALSE;
		}

		strcpy( pTrack->pName, (char*) szFileName );
		if ( sound_ReadTrackFromFile(pTrack, szFileName) == FALSE )
		{
			return FALSE;
		}

		return sound_AddTrack( pTrack );
	}

	return FALSE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_ReleaseTrack( TRACK *psTrack )
{
	//~~~~~~~~~~~
	SDWORD	iTrack;
	//~~~~~~~~~~~

	if ( psTrack->pName != NULL )
	{
		FREE( psTrack->pName );
	}

	for ( iTrack = 0; iTrack < g_iCurTracks; iTrack++ )
	{
		if ( g_apTrack[iTrack] == psTrack )
		{
			g_apTrack[iTrack] = NULL;
		}
	}

	sound_FreeTrack( psTrack );
	FREE( psTrack );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_CheckAllUnloaded( void )
{
	//~~~~~~~~~~~
	SDWORD	iTrack;
	//~~~~~~~~~~~

	for ( iTrack = 0; iTrack < MAX_TRACKS; iTrack++ )
	{
		ASSERT( g_apTrack[iTrack] == NULL, "sound_CheckAllUnloaded: check audio.cfg for duplicate IDs\n" );
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_TrackLooped( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->bLoop;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_TrackAudibleRadius( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iAudibleRadius;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetNumPlaying( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iNumPlaying;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
static void sound_CheckSample( AUDIO_SAMPLE *psSample )
{
	ASSERT( psSample != NULL, "sound_CheckSample: sample pointer invalid\n" );
	ASSERT( psSample->iSample >= 0 || psSample->iSample == (ALuint)SAMPLE_NOT_ALLOCATED, "sound_CheckSample: sample %i out of range\n", psSample->iSample );
	// FIXME iSample always >= 0 !
	// FIXME Leaving as is because if this is not always true it asserts too often
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_CheckTrack( SDWORD iTrack )
{
	if ( iTrack < 0 || iTrack > g_iCurTracks - 1 )
	{
		debug( LOG_SOUND, "sound_CheckTrack: track number %i outside max %i\n", iTrack, g_iCurTracks );
		return FALSE;
	}

	if ( g_apTrack[iTrack] == NULL )
	{
		debug( LOG_SOUND, "sound_CheckTrack: track %i NULL\n", iTrack );
		return FALSE;
	}

	return TRUE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetTrackTime( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iTime;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetTrackPriority( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iPriority;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetTrackVolume( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iVol;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetTrackAudibleRadius( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iAudibleRadius;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
const char *sound_GetTrackName( SDWORD iTrack )
{
	if ( iTrack == SAMPLE_NOT_FOUND ) return NULL;
	ASSERT( g_apTrack[iTrack] != NULL, "sound_GetTrackName: unallocated track" );
	return g_apTrack[iTrack] ? g_apTrack[iTrack]->pName : "unallocated";
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_Play2DTrack( AUDIO_SAMPLE *psSample, BOOL bQueued )
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	//~~~~~~~~~~~~~

	if (!sound_CheckTrack(psSample->iTrack))
	  return FALSE;

	psTrack = g_apTrack[psSample->iTrack];

	if (psTrack == NULL) return FALSE;

	return sound_Play2DSample( psTrack, psSample, bQueued );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
BOOL sound_Play3DTrack( AUDIO_SAMPLE *psSample )
{
	//~~~~~~~~~~~~~
	TRACK	*psTrack;
	//~~~~~~~~~~~~~

	if (!sound_CheckTrack(psSample->iTrack))
	  return FALSE;

	psTrack = g_apTrack[psSample->iTrack];
	return sound_Play3DSample( psTrack, psSample );
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_StopTrack( AUDIO_SAMPLE *psSample )
{
	sound_CheckSample( psSample );
	if ( psSample->iSample != (ALuint)SAMPLE_NOT_ALLOCATED )
	{
		sound_StopSample( psSample->iSample );
	}

	// do stopped callback
	if ( g_pStopTrackCallback != NULL && psSample->psObj != NULL )
	{
		( g_pStopTrackCallback ) ( psSample );
	}

	// update number of samples playing
	g_iSamples--;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_PauseTrack( AUDIO_SAMPLE *psSample )
{
	if ( psSample->iSample != (ALuint)SAMPLE_NOT_ALLOCATED )
	{
		sound_StopSample( psSample->iSample );
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_FinishedCallback( AUDIO_SAMPLE *psSample )
{
	sound_CheckSample( psSample );
	if ( g_apTrack[psSample->iTrack] != NULL )
	{
		g_apTrack[psSample->iTrack]->iTimeLastFinished = sound_GetGameTime();
	}

	// call user callback if specified
	if ( psSample->pCallback != NULL )
	{
		( psSample->pCallback ) ( psSample );
	}

	// set remove flag
	psSample->bRemove = TRUE;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetTrackID( TRACK *psTrack )
{
	//~~~~~~~~~~
	SDWORD	i = 0;
	//~~~~~~~~~~

	// find matching track
	for ( i = 0; i < MAX_TRACKS; i++ )
	{
		if ( (g_apTrack[i] != NULL) && (g_apTrack[i] == psTrack) )
		{
			break;
		}
	}

	// if matching track found return it else find empty track
	if ( i < MAX_TRACKS )
	{
		return i;
	}
	else
	{
		return SAMPLE_NOT_FOUND;
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
SDWORD sound_GetAvailableID( void )
{
	//~~~~~~
	SDWORD	i;
	//~~~~~~

	for ( i = 0; i < MAX_TRACKS; i++ )
	{
		if ( g_apTrack[i] == NULL )
		{
			break;
		}
	}

	ASSERT( i < MAX_TRACKS, "sound_GetTrackID: unused track not found!\n" );
	if ( i < MAX_TRACKS )
	{
		return i;
	}
	else
	{
		return SAMPLE_NOT_ALLOCATED;
	}
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_SetStoppedCallback( AUDIO_CALLBACK pStopTrackCallback )
{
	g_pStopTrackCallback = pStopTrackCallback;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
UDWORD sound_GetTrackTimeLastFinished( SDWORD iTrack )
{
	sound_CheckTrack( iTrack );
	return g_apTrack[iTrack]->iTimeLastFinished;
}

//*
// =======================================================================================================================
// =======================================================================================================================
//
void sound_SetTrackTimeLastFinished( SDWORD iTrack, UDWORD iTime )
{
	sound_CheckTrack( iTrack );
	g_apTrack[iTrack]->iTimeLastFinished = iTime;
}