/******************************************************************************/
/* SOUND.H                                                                    */
/* ----------------                                                           */
/* MiniFMOD public source code release.                                       */
/* This source is provided as-is.  Firelight Multimedia will not support      */
/* or answer questions about the source provided.                             */
/* MiniFMOD Sourcecode is copyright (c) 2000, Firelight Multimedia.           */
/* MiniFMOD Sourcecode is in no way representative of FMOD 3 source.          */
/* Firelight Multimedia is a registered business name.                        */
/* This source must not be redistributed without this notice.                 */
/******************************************************************************/

#ifndef _SOUND_H_
#define _SOUND_H_

#include <windows.h>
#include <mmsystem.h>

#include "system_memory.h"

//= DEFINITIONS ===============================================================================

#ifndef NULL
	#define NULL ((void *)(0L))
#endif
#ifndef TRUE
	#define TRUE 1L
#endif
#ifndef FALSE    
	#define FALSE 0L
#endif

#define FSOUND_LATENCY	20

#define BLOCK_ON_SOFTWAREUPDATE() while(FSOUND_Software_UpdateMutex);

/*
[DEFINE_START] 
[
 	[NAME] 
	FSOUND_MODES
	
	[DESCRIPTION]	
	Sample description bitfields, OR them together for loading and describing samples.
]
*/
#define FSOUND_NORMAL		0x0			// Default sample type.  Loop off, 8bit mono, signed, not hardware accelerated.
#define FSOUND_LOOP_OFF		0x01		// For non looping samples.
#define FSOUND_LOOP_NORMAL	0x02		// For forward looping samples.
#define FSOUND_LOOP_BIDI	0x04		// For bidirectional looping samples.  (no effect if in hardware).
#define FSOUND_8BITS		0x08		// For 8 bit samples.
#define FSOUND_16BITS		0x10		// For 16 bit samples.
#define FSOUND_MONO			0x20		// For mono samples.
#define FSOUND_STEREO		0x40		// For stereo samples.
#define FSOUND_UNSIGNED		0x80		// For source data containing unsigned samples.
#define FSOUND_SIGNED		0x100		// For source data containing signed data.
#define FSOUND_DELTA		0x200		// For source data stored as delta values.
#define FSOUND_IT214		0x400		// For source data stored using IT214 compression.
#define FSOUND_IT215		0x800		// For source data stored using IT215 compression.
// [DEFINE_END]



/*
[DEFINE_START] 
[
 	[NAME] 
	FSOUND_SAMPLEMODE
	
	[DESCRIPTION]	

	[SEE_ALSO]		
	FSOUND_CD_Play
]
*/
#define FSOUND_FREE					-1	// definition for dynamically allocated channel or sample
// [DEFINE_END]


// ==============================================================================================
// STRUCTURE DEFINITIONS 
// ==============================================================================================

// Sample type - contains info on sample
typedef struct FSOUND_SAMPLE
{                	
	unsigned char 	*buff;			// pointer to sound data

	// ====================================================================================
	// BUGFIX 1.5 (finetune was in wrong place)
	// DONT CHANGE THE ORDER OF THESE NEXT MEMBERS AS THEY ARE ALL LOADED IN A SINGLE READ
	unsigned int 	length;       	// sample length (samples)
	unsigned int 	loopstart;    	// sample loop start (samples)
	unsigned int 	looplen;      	// sample loop length (samples) 
	unsigned char	defvol;    		// sample default volume
	signed char		finetune;		// finetune value from -128 to 127 
	// ====================================================================================

	int 			deffreq;     	// sample default speed in hz
	int				defpan;       	// sample default pan

	unsigned char	bits;			// bits per sample
	unsigned char	loopmode;      	// loop type 

	// music stuff
	unsigned char 	globalvol;    	// sample global volume (scalar)
	signed char		relative;	  	// relative note 
	int				middlec;      	// finetuning adjustment to make for music samples.. relative to 8363hz 
	unsigned int 	susloopbegin;  	// sample loop start
	unsigned int 	susloopend;    	// sample loop length
	unsigned char 	vibspeed;		// vibrato speed 0-64 
	unsigned char	vibdepth;		// vibrato depth 0-64 
	unsigned char	vibtype;		// vibrato type 0=sine, 1=rampdown, 2=square, 3=random
	unsigned char	vibrate;		// vibrato rate 0-64 (like sweep?) 

} FSOUND_SAMPLE;


// Channel type - contains information on a mixing channel
typedef struct 
{
	int				index;			// position in channel pool.
	int				volume;   		// current volume (00-FFh).
	int				frequency;		// speed or rate of playback in hz.
	int				pan;   			// panning value (00-FFh).
	int				actualvolume;   // driver level current volume.
	int				actualpan;   	// driver level panning value.
	unsigned int 	sampleoffset; 	// sample offset (sample starts playing from here).

	FSOUND_SAMPLE	*sptr;			// currently playing sample

	// software mixer stuff
	unsigned int	leftvolume;     // mixing information. adjusted volume for left channel (panning involved)
	unsigned int	rightvolume;    // mixing information. adjusted volume for right channel (panning involved)
	unsigned int	mixpos;			// mixing information. high part of 32:32 fractional position in sample
	unsigned int	mixposlo;		// mixing information. low part of 32:32 fractional position in sample
	unsigned int	speedlo;		// mixing information. playback rate - low part fractional
	unsigned int	speedhi;		// mixing information. playback rate - high part fractional
	unsigned int	speeddir;		// mixing information. playback direction - forwards or backwards

	// software mixer volume ramping stuff
	unsigned int	ramp_lefttarget;     
	unsigned int	ramp_righttarget;    
	unsigned int	ramp_leftvolume;     
	unsigned int	ramp_rightvolume;    
	unsigned int	ramp_leftspeed;
	unsigned int	ramp_rightspeed;
	unsigned int	ramp_count;
} FSOUND_CHANNEL;

//= FUNCTIONS =================================================================================

typedef struct 
{
	WAVEHDR		wavehdr;
	signed char	*data;
} FSOUND_SoundBlock;


//= VARIABLE EXTERNS ==========================================================================
#ifdef __cplusplus
extern "C" 
{
#endif

FSOUND_CHANNEL			FSOUND_Channel[];
int						FSOUND_MixRate;
int						FSOUND_BufferSize;			// software buffersize
int						FSOUND_BufferSizeMs;
HWAVEOUT				FSOUND_WaveOutHandle;
FSOUND_SoundBlock		FSOUND_MixBlock;

// mixing info
signed char *			FSOUND_MixBufferMem;		// mix buffer memory block
signed char	*			FSOUND_MixBuffer;			// mix output buffer (16bit or 32bit)
unsigned int			FSOUND_MixerAddress;		// actual address of the function
int						FSOUND_HWMixOffset;			// the offset in the output buffer to mix into in bytes
float					FSOUND_OOMixRate;			// mixing rate in hz.
int						FSOUND_BufferSize;			// size of 1 'latency' ms buffer in bytes
int						FSOUND_BlockSize;			// LATENCY ms worth of samples

volatile signed char	FSOUND_Software_Exit;		// mixing thread termination flag
volatile signed char	FSOUND_Software_UpdateMutex;
volatile signed char	FSOUND_Software_ThreadFinished;
volatile HANDLE			FSOUND_Software_hThread;
volatile int			FSOUND_Software_FillBlock;
volatile int			FSOUND_Software_RealBlock;

DWORD					FSOUND_Software_DoubleBufferThread(LPDWORD lpdwParam);
void					FSOUND_Software_Fill();

#ifdef __cplusplus
}
#endif

#endif