audio.h
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/*====================================================================
* audio.h
*
* Synopsis:
*
* 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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,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 Unpublished - rights reserved under the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 __audio__
#define __audio__
#include <ultra64.h>
#include <libaudio.h>
#include <sched.h>
#define MAX_SYNTH_UPDATES 48
#define MAX_SEQP_EVENTS 48
#define MAX_SNDP_EVENTS 36
#define AUDIO_HEAP_SIZE 400000
#define MAX_SYNTH_VVOICES 20
#define MAX_SYNTH_PVOICES 20
#define MAX_SEQP_VOICES 20
#define MAX_SNDP_VOICES 12
#define EXTRA_SAMPLES 80
#define NUM_OUTPUT_BUFFERS 3 /* Need three of these */
#define OUTPUT_RATE 44100
#define QUIT_MSG 10
#define AUDIO_STACKSIZE 0x600
#define MAX_SEQ_LENGTH 30000
#define DMA_BUFFER_LENGTH 0x500 /* Larger buffers result in fewer DMA' but more */
/* memory being used. */
#define NUM_ACMD_LISTS 2 /* two lists used by this example */
#define MAX_RSP_CMDS 2000 /* max number of commands in any command list. */
/* Mainly dependent on sequences used */
#define NUM_DMA_BUFFERS 40 /* max number of dma buffers needed. */
/* Mainly dependent on sequences and sfx's */
#define NUM_DMA_MESSAGES 20 /* The maximum number of DMAs any one frame can */
/* have. */
#define FRAME_LAG 1 /* The number of frames to keep a dma buffer. */
/* Increasing this number causes buffers to not */
/* be deleted as quickly. This results in fewer */
/* DMA's but you need more buffers. */
#define MAX_AUDIO_MSGS 8
typedef union {
struct {
short type;
} gen;
struct {
short type;
struct AudioInfo_s *info;
} done;
OSScMsg app;
} AudioMsg;
typedef struct AudioInfo_s {
short *data; /* Output data pointer */
short frameSamples; /* # of samples synthesized in this frame */
OSScTask task; /* scheduler structure */
AudioMsg msg; /* completion message */
} AudioInfo;
typedef struct {
Acmd *ACMDList[NUM_ACMD_LISTS];
AudioInfo *audioInfo[NUM_OUTPUT_BUFFERS];
OSThread thread;
OSMesgQueue audioFrameMsgQ;
OSMesg audioFrameMsgBuf[MAX_AUDIO_MSGS];
OSMesgQueue audioReplyMsgQ;
OSMesg audioReplyMsgBuf[MAX_AUDIO_MSGS];
ALGlobals g;
} AMAudioMgr;
typedef struct
{
ALLink node;
u32 startAddr;
u32 lastFrame;
char *ptr;
} AMDMABuffer;
typedef struct
{
u8 initialized;
AMDMABuffer *firstUsed;
AMDMABuffer *firstFree;
} AMDMAState;
void amCreateAudioMgr(ALSynConfig *c, OSPri priority);
void AudioInit(void);
extern u64 audYieldBuf[];
#endif