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//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// This program 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.
//
// This program 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.
//
// DESCRIPTION:
// The not so system specific sound interface.
//
#ifndef __I_SOUND__
#define __I_SOUND__
#include "doomtype.h"
//
// SoundFX struct.
//
typedef struct sfxinfo_struct sfxinfo_t;
struct sfxinfo_struct
{
// tag name, used for hexen.
char *tagname;
// lump name. If we are running with use_sfx_prefix=true, a
// 'DS' (or 'DP' for PC speaker sounds) is prepended to this.
char name[9];
// Sfx priority
int priority;
// referenced sound if a link
sfxinfo_t *link;
// pitch if a link
int pitch;
// volume if a link
int volume;
// this is checked every second to see if sound
// can be thrown out (if 0, then decrement, if -1,
// then throw out, if > 0, then it is in use)
int usefulness;
// lump number of sfx
int lumpnum;
// Maximum number of channels that the sound can be played on
// (Heretic)
int numchannels;
// data used by the low level code
void *driver_data;
};
//
// MusicInfo struct.
//
typedef struct
{
// up to 6-character name
char *name;
// lump number of music
int lumpnum;
// music data
void *data;
// music handle once registered
void *handle;
} musicinfo_t;
typedef enum
{
SNDDEVICE_NONE = 0,
SNDDEVICE_PCSPEAKER = 1,
SNDDEVICE_ADLIB = 2,
SNDDEVICE_SB = 3,
SNDDEVICE_PAS = 4,
SNDDEVICE_GUS = 5,
SNDDEVICE_WAVEBLASTER = 6,
SNDDEVICE_SOUNDCANVAS = 7,
SNDDEVICE_GENMIDI = 8,
SNDDEVICE_AWE32 = 9,
SNDDEVICE_CD = 10,
} snddevice_t;
// Interface for sound modules
typedef struct
{
// List of sound devices that this sound module is used for.
snddevice_t *sound_devices;
int num_sound_devices;
// Initialise sound module
// Returns true if successfully initialised
boolean (*Init)(boolean use_sfx_prefix);
// Shutdown sound module
void (*Shutdown)(void);
// Returns the lump index of the given sound.
int (*GetSfxLumpNum)(sfxinfo_t *sfxinfo);
// Called periodically to update the subsystem.
void (*Update)(void);
// Update the sound settings on the given channel.
void (*UpdateSoundParams)(int channel, int vol, int sep);
// Start a sound on a given channel. Returns the channel id
// or -1 on failure.
int (*StartSound)(sfxinfo_t *sfxinfo, int channel, int vol, int sep);
// Stop the sound playing on the given channel.
void (*StopSound)(int channel);
// Query if a sound is playing on the given channel
boolean (*SoundIsPlaying)(int channel);
// Called on startup to precache sound effects (if necessary)
void (*CacheSounds)(sfxinfo_t *sounds, int num_sounds);
} sound_module_t;
void I_InitSound(boolean use_sfx_prefix);
void I_ShutdownSound(void);
int I_GetSfxLumpNum(sfxinfo_t *sfxinfo);
void I_UpdateSound(void);
void I_UpdateSoundParams(int channel, int vol, int sep);
int I_StartSound(sfxinfo_t *sfxinfo, int channel, int vol, int sep);
void I_StopSound(int channel);
boolean I_SoundIsPlaying(int channel);
void I_PrecacheSounds(sfxinfo_t *sounds, int num_sounds);
// Interface for music modules
typedef struct
{
// List of sound devices that this music module is used for.
snddevice_t *sound_devices;
int num_sound_devices;
// Initialise the music subsystem
boolean (*Init)(void);
// Shutdown the music subsystem
void (*Shutdown)(void);
// Set music volume - range 0-127
void (*SetMusicVolume)(int volume);
// Pause music
void (*PauseMusic)(void);
// Un-pause music
void (*ResumeMusic)(void);
// Register a song handle from data
// Returns a handle that can be used to play the song
void *(*RegisterSong)(void *data, int len);
// Un-register (free) song data
void (*UnRegisterSong)(void *handle);
// Play the song
void (*PlaySong)(void *handle, boolean looping);
// Stop playing the current song.
void (*StopSong)(void);
// Query if music is playing.
boolean (*MusicIsPlaying)(void);
// Invoked periodically to poll.
void (*Poll)(void);
} music_module_t;
void I_InitMusic(void);
void I_ShutdownMusic(void);
void I_SetMusicVolume(int volume);
void I_PauseSong(void);
void I_ResumeSong(void);
void *I_RegisterSong(void *data, int len);
void I_UnRegisterSong(void *handle);
void I_PlaySong(void *handle, boolean looping);
void I_StopSong(void);
boolean I_MusicIsPlaying(void);
extern int snd_sfxdevice;
extern int snd_musicdevice;
extern int snd_samplerate;
extern int snd_cachesize;
extern int snd_maxslicetime_ms;
extern char *snd_musiccmd;
void I_BindSoundVariables(void);
#endif
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