n_sndp.h
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/*====================================================================
*
* Copyright 1995, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
#ifndef __N_SNDP__
#define __N_SNDP__
#include <libaudio.h>
#include "n_libaudio.h"
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif
#define MIN_RATIO 0.0001
typedef enum {
AL_SNDP_PLAY_EVT,
AL_SNDP_STOP_EVT,
AL_SNDP_PAN_EVT,
AL_SNDP_VOL_EVT,
AL_SNDP_PITCH_EVT,
AL_SNDP_API_EVT,
AL_SNDP_DECAY_EVT,
AL_SNDP_END_EVT,
AL_SNDP_FX_EVT
} ALSndpMsgType;
typedef struct {
N_ALVoice voice;
ALSound *sound; /* sound referenced here */
s16 priority;
f32 pitch; /* current playback pitch */
s32 state; /* play state for this sound */
s16 vol; /* volume - combined with volume from bank */
ALPan pan; /* pan - 0 = left, 127 = right */
u8 fxMix; /* wet/dry mix - 0 = dry, 127 = wet */
} N_ALSoundState;
typedef union {
N_ALEvent msg;
struct {
s16 type;
N_ALSoundState *state;
} common;
struct {
s16 type;
N_ALSoundState *state;
s16 vol;
} vol;
struct {
s16 type;
N_ALSoundState *state;
f32 pitch;
} pitch;
struct {
s16 type;
N_ALSoundState *state;
ALPan pan;
} pan;
struct {
s16 type;
N_ALSoundState *state;
u8 mix;
} fx;
} N_ALSndpEvent;
static ALMicroTime _n_sndpVoiceHandler(void *node);
static void _n_handleEvent(N_ALSndpEvent *event);
static void _removeEvents(ALEventQueue *evtq, N_ALSoundState *state);
static s32 _DivS32ByF32 (s32 i, f32 f);
#endif /* __N_SNDP__ */