//=======================================================================
//			Copyright XashXT Group 2009 ©
//			sound.h - sndlib main header
//=======================================================================

#ifndef SOUND_H
#define SOUND_H

#include <windows.h>
#include "launch_api.h"
#include "qfiles_ref.h"
#include "vsound_api.h"

extern stdlib_api_t com;
extern vsound_imp_t	si;
extern byte *sndpool;

#include "mathlib.h"

typedef struct
{
	int		left;
	int		right;
} portable_samplepair_t;

typedef struct
{
	int 		length;
	int 		loopstart;
	int 		speed;		// not needed, because converted on load?
	int 		width;
	int 		stereo;
	byte		data[1];		// variable sized
} sfxcache_t;

typedef struct sfx_s
{
	string 		name;
	sfxcache_t	*cache;

	int		registration_sequence;
	bool		default_sound;
} sfx_t;

// a playsound_t will be generated by each call to S_StartSound,
// when the mixer reaches playsound->begin, the playsound will
// be assigned to a channel
typedef struct playsound_s
{
	struct playsound_s	*prev, *next;
	sfx_t		*sfx;
	float		volume;
	float		attenuation;
	int		entnum;
	int		entchannel;
	bool		fixed_origin;	// use origin field instead of entnum's origin
	bool		use_loop;
	vec3_t		origin;
	uint		begin;		// begin on this sample
} playsound_t;

typedef struct
{
	int		channels;
	int		samples;		// mono samples in buffer
	int		submission_chunk;	// don't mix less than this #
	int		samplepos;	// in mono samples
	int		samplebits;
	int		speed;
	byte		*buffer;
} dma_t;

typedef struct
{
	sfx_t		*sfx;		// sfx number
	int		leftvol;		// 0-255 volume
	int		rightvol;		// 0-255 volume
	int		end;		// end time in global paintsamples
	int 		pos;		// sample position in sfx
	int		looping;		// where to loop, -1 = no looping OBSOLETE?
	int		entnum;		// to allow overriding a specific sound
	int		loopnum;		// entity num that playing autosound
	int		loopframe;	// for stopping looping sounds
	int		entchannel;	//
	vec3_t		origin;		// only use if fixed_origin is set
	vec_t		dist_mult;	// distance multiplier (attenuation/clipK)
	int		master_vol;	// 0-255 master volume
	bool		fixed_origin;	// use origin instead of fetching entnum's origin
	bool		autosound;	// from an entity->sound, cleared each frame
	bool		use_loop;		// don't loop default and local sounds
} channel_t;

typedef struct
{
	int		rate;
	int		width;
	int		channels;
	int		loopstart;
	int		samples;
	int		dataofs;		// chunk starts this many bytes from file start
} wavinfo_t;

typedef struct
{
	string		introName;
	string		loopName;
	bool		looping;
	file_t		*file;
	int		start;
	int		rate;
	uint		format;
	void		*vorbisFile;
} bg_track_t;

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

  SYSTEM SPECIFIC FUNCTIONS

====================================================================
*/
#define Host_Error com.error
#define Z_Malloc( size )	Mem_Alloc( sndpool, size )

// initializes cycling through a DMA buffer and returns information on it
bool SNDDMA_Init( void *hInst );
int SNDDMA_GetDMAPos( void );
void SNDDMA_Shutdown( void );
void SNDDMA_BeginPainting( void );
void SNDDMA_Submit( void );

//====================================================================

#define MAX_CHANNELS	64
#define MAX_RAW_SAMPLES	8192

extern channel_t	channels[MAX_CHANNELS];
extern int	paintedtime;
extern int	s_rawend;
extern vec3_t	listener_origin;
extern vec3_t	listener_forward;
extern vec3_t	listener_right;
extern vec3_t	listener_up;
extern dma_t	dma;
extern playsound_t	s_pendingplays;
extern bool	sound_started;

extern cvar_t	*s_check_errors;
extern cvar_t	*s_volume;
extern cvar_t	*s_nosound;
extern cvar_t	*s_loadas8bit;
extern cvar_t	*s_khz;
extern cvar_t	*s_show;
extern cvar_t	*s_mixahead;
extern cvar_t	*s_testsound;
extern cvar_t	*s_primary;

extern portable_samplepair_t		s_rawsamples[MAX_RAW_SAMPLES];

void S_InitScaletable( void );
sfxcache_t *S_LoadSound( sfx_t *sfx );
void S_IssuePlaysound( playsound_t *ps );
void S_PaintChannels( int endtime );

bool S_Init( void *hInst );
void S_Shutdown( void );
void S_Activate( bool active );
void S_SoundList_f( void );
void S_SoundInfo_f( void );

// if origin is NULL, the sound will be dynamically sourced from the entity
void S_StartSound( const vec3_t pos, int ent, int chan, sound_t sfx, float vol, float attn, float pitch, bool use_loop);
void S_Update( int entnum, const vec3_t pos, const vec3_t vel, const vec3_t axis[3], bool clear );
void S_StreamRawSamples( int samples, int rate, int width, int channels, const byte *data );
bool S_AddLoopingSound( int entnum, sound_t handle, float volume, float attn );
void S_StartBackgroundTrack( const char *intro, const char *loop );
channel_t	*S_PickChannel( int entNum, int entChannel );
int S_StartLocalSound( const char *name, float volume, float pitch, const float *org );
sfx_t *S_GetSfxByHandle( sound_t handle );
void S_StopBackgroundTrack( void );
void S_StartStreaming( void );
void S_StopStreaming( void );
void S_StopAllSounds( void );
void S_FreeSounds( void );

void S_BeginRegistration( void );
sound_t S_RegisterSound( const char *sample );
void S_EndRegistration( void );

#endif//SOUND_H