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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 SCI_SFX_CORE_H
#define SCI_SFX_CORE_H
#include "common/error.h"
#include "sci/sfx/songlib.h"
#include "sci/resource.h"
namespace Sci {
class SongIterator;
struct fade_params_t;
#define SFX_TICKS_PER_SEC 60 /* MIDI ticks per second */
#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 */
class SfxState {
public: // FIXME, make private
SongIterator *_it; /**< The song iterator at the heart of things */
uint _flags; /**< SFX_STATE_FLAG_* */
songlib_t _songlib; /**< Song library */
song_t *_song; /**< Active song, or start of active song chain */
bool _suspended; /**< Whether we are suspended */
uint _debug; /**< Debug flags */
ResourceSync *_soundSync; /**< Used by kDoSync for speech syncing in CD talkie games */
AudioResource *_audioResource; /**< Used for audio resources in CD talkie games */
public:
/***********/
/* General */
/***********/
/* Initializes the sound engine
** Parameters: (ResourceManager *) resmgr: Resource manager for initialization
** (int) flags: SFX_STATE_FLAG_*
*/
void sfx_init(ResourceManager *resmgr, int flags);
/** Deinitializes the sound subsystem. */
void sfx_exit();
/* Suspends/unsuspends the sound sybsystem
** Parameters: (int) suspend: Whether to suspend (non-null) or to unsuspend
*/
void sfx_suspend(bool suspend);
/* 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(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_poll_specific(song_handle_t handle, int *cue);
/* Determines the current global volume settings
** Returns : (int) The global volume, between 0 (silent) and 127 (max. volume)
*/
int sfx_get_volume();
/* Determines the current global volume settings
** Parameters: (int) volume: The new global volume, between 0 and 127 (see above)
*/
void sfx_set_volume(int volume);
/* Stops all songs currently playing, purges song library
*/
void sfx_all_stop();
/*****************/
/* Song basics */
/*****************/
/* Adds a song to the internal sound library
** Parameters: (SongIterator *) 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
*/
int sfx_add_song(SongIterator *it, int priority, song_handle_t handle, int resnum);
/* Deletes a song and its associated song iterator from the song queue
** Parameters: (song_handle_t) handle: The song to remove
*/
void sfx_remove_song(song_handle_t handle);
/**********************/
/* Song modifications */
/**********************/
/* 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_set_status(song_handle_t handle, int status);
/* Sets the new song priority
** Parameters: (song_handle_t) handle: The handle to modify
** (int) priority: The priority to set
*/
void sfx_song_renice(song_handle_t handle, int priority);
/* 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_loops(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) hold: Number of loops to setn
*/
void sfx_song_set_hold(song_handle_t handle, int hold);
/* 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
*/
void sfx_song_set_fade(song_handle_t handle, fade_params_t *fade_setup);
// Previously undocumented:
Common::Error sfx_send_midi(song_handle_t handle, int channel,
int command, int arg1, int arg2);
protected:
void freezeTime();
void thawTime();
bool isPlaying(song_t *song);
void setSongStatus(song_t *song, int status);
void updateSingleSong();
void updateMultiSong();
void update();
};
} // End of namespace Sci
#endif // SCI_SFX_CORE_H
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