// T3DLIB3.H - Header file for T3DLIB3.CPP game engine library

// watch for multiple inclusions
#ifndef T3DLIB3
#define T3DLIB3

// DEFINES ////////////////////////////////////////////////


#define DM_NUM_SEGMENTS 64 // number of midi segments that can be cached in memory

// midi object state defines
#define MIDI_NULL     0   // this midi object is not loaded
#define MIDI_LOADED   1   // this midi object is loaded
#define MIDI_PLAYING  2   // this midi object is loaded and playing
#define MIDI_STOPPED  3   // this midi object is loaded, but stopped


#define MAX_SOUNDS     256 // max number of sounds in system at once 

// digital sound object state defines
#define SOUND_NULL     0 // " "
#define SOUND_LOADED   1
#define SOUND_PLAYING  2
#define SOUND_STOPPED  3

// directx 7.0 compatibility

#ifndef DSBCAPS_CTRLDEFAULT
#define DSBCAPS_CTRLDEFAULT (DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME )
#endif

// MACROS /////////////////////////////////////////////////

#define DSVOLUME_TO_DB(volume) ((DWORD)(-30*(100 - volume)))

// Convert from multibyte format to Unicode using the following macro:
#define MULTI_TO_WIDE( x,y )  MultiByteToWideChar( CP_ACP,MB_PRECOMPOSED, y,-1,x,_MAX_PATH);

// initializes a direct draw struct
#define DD_INIT_STRUCT(ddstruct) { memset(&ddstruct,0,sizeof(ddstruct)); ddstruct.dwSize=sizeof(ddstruct); }


// TYPES //////////////////////////////////////////////////

// this holds a single sound
typedef struct pcm_sound_typ
	{
	LPDIRECTSOUNDBUFFER dsbuffer;   // the ds buffer containing the sound
	int state;                      // state of the sound
	int rate;                       // playback rate
	int size;                       // size of sound
	int id;                         // id number of the sound
	} pcm_sound, *pcm_sound_ptr;

// directmusic MIDI segment
typedef struct DMUSIC_MIDI_TYP
{
IDirectMusicSegment        *dm_segment;  // the directmusic segment
IDirectMusicSegmentState   *dm_segstate; // the state of the segment
int                        id;           // the id of this segment               
int                        state;        // state of midi song

} DMUSIC_MIDI, *DMUSIC_MIDI_PTR;


// PROTOTYPES /////////////////////////////////////////////

// directsound
int DSound_Load_WAV(char *filename, int control_flags = DSBCAPS_CTRLDEFAULT);
int DSound_Replicate_Sound(int source_id);
int DSound_Play(int id, int flags=0, int volume=0, int rate=0, int pan=0);
int DSound_Stop_Sound(int id);
int DSound_Stop_All_Sounds(void);
int DSound_Init(void);
int DSound_Shutdown(void);
int DSound_Delete_Sound(int id);
int DSound_Delete_All_Sounds(void);
int DSound_Status_Sound(int id);
int DSound_Set_Volume(int id,int vol);
int DSound_Set_Freq(int id,int freq);
int DSound_Set_Pan(int id,int pan);

// directmusic
int DMusic_Load_MIDI(char *filename);
int DMusic_Play(int id);
int DMusic_Stop(int id);
int DMusic_Shutdown(void);
int DMusic_Delete_MIDI(int id);
int DMusic_Delete_All_MIDI(void);
int DMusic_Status_MIDI(int id);
int DMusic_Init(void);

// directmusic

// GLOBALS ////////////////////////////////////////////////


// EXTERNALS //////////////////////////////////////////////

extern HWND main_window_handle; // save the window handle
extern HINSTANCE main_instance; // save the instance

extern LPDIRECTSOUND		lpds;           // directsound interface pointer
extern DSBUFFERDESC			dsbd;           // directsound description
extern DSCAPS				dscaps;         // directsound caps
extern HRESULT				dsresult;       // general directsound result
extern DSBCAPS				dsbcaps;        // directsound buffer caps

extern LPDIRECTSOUNDBUFFER	lpdsbprimary;   // the primary mixing buffer
extern pcm_sound			sound_fx[MAX_SOUNDS];    // the array of secondary sound buffers

extern WAVEFORMATEX			pcmwf;          // generic waveformat structure

// direct music globals
extern IDirectMusicPerformance    *dm_perf ;    // the directmusic performance manager 
extern IDirectMusicLoader         *dm_loader;  // the directmusic loader

// this hold all the directmusic midi objects
extern DMUSIC_MIDI                dm_midi[DM_NUM_SEGMENTS];
extern int dm_active_id;                               // currently active midi segment

#endif