/*

    File:       ULAW.h

    Contains:   Header containing the information needed to parse Sun's .au files.

    Written by: Mark Cookson    

    Copyright:  Copyright © 1996-1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

                8/31/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#ifndef __ULAW__

#define __ULAW__

#include <Errors.h>

#include <SoundComponents.h>

#include <Types.h>

#ifndef __DBFFERRORS__

#include "DBFF_Errors.h"

#endif

#ifndef __SETUPDBHEADER__

#include "SetupDBHeader.h"

#endif

#ifndef __LDANDFIX__

#include "LDandFix.h"

#endif

#ifndef __DEFINES__

#include "Defines.h"

#endif

/* data format possibilities */

#define SND_FORMAT_UNSPECIFIED              0       /* unspecified format (can't support this) */

#define SND_FORMAT_MULAW_8                  1       /* 8-bit mu-law samples */

#define SND_FORMAT_LINEAR_8                 2       /* 8-bit linear samples */

#define SND_FORMAT_LINEAR_16                3       /* 16-bit linear samples */

#define SND_FORMAT_LINEAR_24                4       /* 24-bit linear samples (can't support this) */

#define SND_FORMAT_LINEAR_32                5       /* 32-bit linear samples (can't support this) */

#define SND_FORMAT_FLOAT                    6       /* floating-point samples (can't support this) */

#define SND_FORMAT_DOUBLE                   7       /* double-precision float samples (can't support this) */

#define SND_FORMAT_INDIRECT                 8       /* fragmented sampled data (can't support this) */

#define SND_FORMAT_NESTED                   9       /* ? (can't support this) */

#define SND_FORMAT_DSP_CORE                 10      /* DSP program (can't support this) */

#define SND_FORMAT_DSP_DATA_8               11      /* 8-bit fixed-point samples (can't support this) */

#define SND_FORMAT_DSP_DATA_16              12      /* 16-bit fixed-point samples (can't support this) */

#define SND_FORMAT_DSP_DATA_24              13      /* 24-bit fixed-point samples (can't support this) */

#define SND_FORMAT_DSP_DATA_32              14      /* 32-bit fixed-point samples (can't support this) */

#define SND_FORMAT_DISPLAY                  16      /* non-audio display data (can't support this, it isn't playable data anyway) */

#define SND_FORMAT_MULAW_SQUELCH            17      /* ? (can't support this) */

#define SND_FORMAT_EMPHASIZED               18      /* 16-bit linear with emphasis (can't support this) */

#define SND_FORMAT_COMPRESSED               19      /* 16-bit linear with compression (can't support this) */

#define SND_FORMAT_COMPRESSED_EMPHASIZED    20      /* A combination of the two above (can't support this) */

#define SND_FORMAT_DSP_COMMANDS             21      /* Music Kit DSP commands (can't support this) */

#define SND_FORMAT_DSP_COMMANDS_SAMPLES     22      /*  ? (can't support this) */

#if PRAGMA_ALIGN_SUPPORTED

#pragma options align=mac68k

#endif

typedef struct auHeader {

    unsigned long           id;                 /* Should be '.snd' */

    unsigned long           offsetToData;       /* Offset into the file to where the data is */

    unsigned long           dataSize;           /* Length of data */

    unsigned long           dataFormat;         /* data format code */

    unsigned long           sampleRate;         /* Samples per second */

    unsigned long           numChannels;        /* 1 mono, 2 stereo */

    unsigned char           info[4];            /* optional text info */

}auHeader;

#if PRAGMA_ALIGN_SUPPORTED

#pragma options align=reset

#endif

        OSErr   ASoundGetULAWHeader     (SoundInfoPtr theSoundInfo,

                                        long *dataStart,

                                        long *length);

#define kULAWHeaderBufferSize 24

#endif