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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/* Sound engine */
#ifndef _SFX_ENGINE_H_
#define _SFX_ENGINE_H_
#include "sci/include/sfx_core.h"
#include "sci/include/sfx_songlib.h"
#include "sci/include/sfx_iterator.h"
#include "sci/include/sciresource.h"
#define SOUND_TICK 1000000 / 60
/* Approximately 16666 microseconds */
#define SFX_STATE_FLAG_MULTIPLAY (1 << 0) /* More than one song playable
** simultaneously ? */
#define SFX_STATE_FLAG_NOSOUND (1 << 1) /* Completely disable sound playing */
#define SFX_DEBUG_SONGS (1 << 0) /* Debug song changes */
#define SFX_DEBUG_CUES (1 << 1) /* Debug cues, loops, and
** song completions */
typedef struct {
song_iterator_t *it; /* The song iterator at the heart of things */
unsigned int flags; /* SFX_STATE_FLAG_* */
songlib_t songlib; /* Song library */
song_t *song; /* Active song, or start of active song chain */
int suspended; /* Whether we are suspended */
unsigned int debug; /* Debug flags */
} sfx_state_t;
/***********/
/* General */
/***********/
void
sfx_init(sfx_state_t *self, resource_mgr_t *resmgr, int flags);
/* Initializes the sound engine
** Parameters: (resource_mgr_t *) resmgr: Resource manager for initialization
** (int) flags: SFX_STATE_FLAG_*
*/
void
sfx_exit(sfx_state_t *self);
/* Deinitializes the sound subsystem
*/
void
sfx_suspend(sfx_state_t *self, int suspend);
/* Suspends/unsuspends the sound sybsystem
** Parameters: (int) suspend: Whether to suspend (non-null) or to unsuspend
*/
int
sfx_poll(sfx_state_t *self, song_handle_t *handle, int *cue);
/* Polls the sound server for cues etc.
** Returns : (int) 0 if the cue queue is empty, SI_LOOP, SI_CUE, or SI_FINISHED otherwise
** (song_handle_t) *handle: The affected handle
** (int) *cue: The sound cue number (if SI_CUE), or the loop number (if SI_LOOP)
*/
int
sfx_poll_specific(sfx_state_t *self, song_handle_t handle, int *cue);
/* Polls the sound server for cues etc.
** Parameters: (song_handle_t) handle: The handle to poll
** Returns : (int) 0 if the cue queue is empty, SI_LOOP, SI_CUE, or SI_FINISHED otherwise
** (int) *cue: The sound cue number (if SI_CUE), or the loop number (if SI_LOOP)
*/
int
sfx_get_volume(sfx_state_t *self);
/* Determines the current global volume settings
** Returns : (int) The global volume, between 0 (silent) and 127 (max. volume)
*/
void
sfx_set_volume(sfx_state_t *self, int volume);
/* Determines the current global volume settings
** Parameters: (int) volume: The new global volume, between 0 and 127 (see above)
*/
void
sfx_all_stop(sfx_state_t *self);
/* Stops all songs currently playing, purges song library
*/
/*****************/
/* Song basics */
/*****************/
int
sfx_add_song(sfx_state_t *self, song_iterator_t *it, int priority, song_handle_t handle, int resnum);
/* Adds a song to the internal sound library
** Parameters: (song_iterator_t *) it: The iterator describing the song
** (int) priority: Initial song priority (higher <-> more important)
** (song_handle_t) handle: The handle to associate with the song
** Returns : (int) 0 on success, nonzero on error
*/
void
sfx_remove_song(sfx_state_t *self, song_handle_t handle);
/* Deletes a song and its associated song iterator from the song queue
** Parameters: (song_handle_t) handle: The song to remove
*/
/**********************/
/* Song modifications */
/**********************/
void
sfx_song_set_status(sfx_state_t *self, song_handle_t handle, int status);
/* Sets the song status, i.e. whether it is playing, suspended, or stopped.
** Parameters: (song_handle_t) handle: Handle of the song to modify
** (int) status: The song status the song should assume
** WAITING and PLAYING are set implicitly and essentially describe the same state
** as far as this function is concerned.
*/
void
sfx_song_renice(sfx_state_t *self, song_handle_t handle, int priority);
/* Sets the new song priority
** Parameters: (song_handle_t) handle: The handle to modify
** (int) priority: The priority to set
*/
void
sfx_song_set_loops(sfx_state_t *self, song_handle_t handle, int loops);
/* Sets the number of loops for the specified song
** Parameters: (song_handle_t) handle: The song handle to reference
** (int) loops: Number of loops to set
*/
void
sfx_song_set_hold(sfx_state_t *self, song_handle_t handle, int hold);
/* Sets the number of loops for the specified song
** Parameters: (song_handle_t) handle: The song handle to reference
** (int) hold: Number of loops to setn
*/
void
sfx_song_set_fade(sfx_state_t *self, song_handle_t handle, fade_params_t *fade_setup);
/* Instructs a song to be faded out
** Parameters: (song_handle_t) handle: The song handle to reference
** (fade_params_t *) fade_setup: The precise fade-out configuration to use
*/
#endif /* !defined(_SFX_ENGINE_H_) */
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