// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2021 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file  i_sound.h
/// \brief System interface, sound, music

#ifndef __I_SOUND__
#define __I_SOUND__

#include "doomdef.h"
#include "sounds.h"
#include "command.h"

// copied from SDL mixer, plus GME
typedef enum {
	MU_NONE,
	MU_WAV,
	MU_MOD,
	MU_MID,
	MU_OGG,
	MU_MP3,
	MU_FLAC,
	MU_GME,
	MU_MOD_EX, // libopenmpt
	MU_MID_EX // Non-native MIDI
} musictype_t;

/**	\brief Sound subsystem runing and waiting
*/
extern UINT8 sound_started;

/**	\brief info of samplerate
*/
extern consvar_t cv_samplerate;
//extern consvar_t cv_rndsoundpitch;

/**	\brief	The I_GetSfx function

	\param	sfx	sfx to setup

	\return	data for sfx
*/
void *I_GetSfx(sfxinfo_t *sfx);

/**	\brief	The I_FreeSfx function

	\param	sfx	sfx to be freed up

	\return	void
*/
void I_FreeSfx(sfxinfo_t *sfx);

/**	\brief Init at program start...
*/
void I_StartupSound(void);

/**	\brief ... shut down and relase at program termination.
*/
void I_ShutdownSound(void);

/// ------------------------
///  SFX I/O
/// ------------------------

/**	\brief	Starts a sound in a particular sound channel.
	\param	id	sfxid
	\param	vol	volume for sound
	\param	sep	left-right balancle
	\param	pitch	not used
	\param	priority	not used

	\return	sfx handle
*/
INT32 I_StartSound(sfxenum_t id, UINT8 vol, UINT8 sep, UINT8 pitch, UINT8 priority, INT32 channel);

/**	\brief	Stops a sound channel.

	\param	handle	stop sfx handle

	\return	void
*/
void I_StopSound(INT32 handle);

/**	\brief Some digital sound drivers need this.
*/
void I_UpdateSound(void);

/**	\brief	Called by S_*() functions to see if a channel is still playing.

	\param	handle	sfx handle

	\return	0 if no longer playing, 1 if playing.
*/
boolean I_SoundIsPlaying(INT32 handle);

/**	\brief	Updates the sfx handle

	\param	handle	sfx handle
	\param	vol	volume
	\param	sep	separation
	\param	pitch	ptich

	\return	void
*/
void I_UpdateSoundParams(INT32 handle, UINT8 vol, UINT8 sep, UINT8 pitch);

/**	\brief	The I_SetSfxVolume function

	\param	volume	volume to set at

	\return	void
*/
void I_SetSfxVolume(UINT8 volume);

/// ------------------------
//  MUSIC SYSTEM
/// ------------------------

/** \brief Init the music systems
*/
void I_InitMusic(void);

/** \brief Shutdown the music systems
*/
void I_ShutdownMusic(void);

/// ------------------------
//  MUSIC PROPERTIES
/// ------------------------

musictype_t I_SongType(void);
boolean I_SongPlaying(void);
boolean I_SongPaused(void);

/// ------------------------
//  MUSIC EFFECTS
/// ------------------------

boolean I_SetSongSpeed(float speed);

/// ------------------------
//  MUSIC SEEKING
/// ------------------------

UINT32 I_GetSongLength(void);

boolean I_SetSongLoopPoint(UINT32 looppoint);
UINT32 I_GetSongLoopPoint(void);

boolean I_SetSongPosition(UINT32 position);
UINT32 I_GetSongPosition(void);

/// ------------------------
//  MUSIC PLAYBACK
/// ------------------------

/**	\brief	Registers a song handle to song data.

	\param	data	pointer to song data
	\param	len	len of data

	\return	song handle

	\todo Remove this
*/
boolean I_LoadSong(char *data, size_t len);

/**	\brief	See ::I_LoadSong, then think backwards

	\param	handle	song handle

	\sa I_LoadSong
	\todo remove midi handle
*/
void I_UnloadSong(void);

/**	\brief	Called by anything that wishes to start music

	\param	handle	Song handle
	\param	looping	looping it if true

	\return	if true, it's playing the song

	\todo pass music name, not handle
*/
boolean I_PlaySong(boolean looping);

/**	\brief	Stops a song over 3 seconds

	\param	handle	Song handle
	\return	void

	/todo drop handle
*/
void I_StopSong(void);

/**	\brief	PAUSE game handling.

	\param	handle	song handle

	\return	void
*/
void I_PauseSong(void);

/**	\brief	RESUME game handling

	\param	handle	song handle

	\return	void
*/
void I_ResumeSong(void);

/**	\brief	The I_SetMusicVolume function

	\param	volume	volume to set at

	\return	void
*/
void I_SetMusicVolume(UINT8 volume);

boolean I_SetSongTrack(INT32 track);

/// ------------------------
/// MUSIC FADING
/// ------------------------

void I_SetInternalMusicVolume(UINT8 volume);
void I_StopFadingSong(void);
boolean I_FadeSongFromVolume(UINT8 target_volume, UINT8 source_volume, UINT32 ms, void (*callback)(void));
boolean I_FadeSong(UINT8 target_volume, UINT32 ms, void (*callback)(void));
boolean I_FadeOutStopSong(UINT32 ms);
boolean I_FadeInPlaySong(UINT32 ms, boolean looping);

#endif