?? common.h
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/**********************************************************************
Copyright (c) 1991 MPEG/audio software simulation group, All Rights Reserved
common.h
**********************************************************************/
/**********************************************************************
* MPEG/audio coding/decoding software, work in progress *
* NOT for public distribution until verified and approved by the *
* MPEG/audio committee. For further information, please contact *
* Davis Pan, 708-538-5671, e-mail: pan@ukraine.corp.mot.com *
* *
* VERSION 4.3 *
* changes made since last update: *
* date programmers comment *
* 2/25/91 Doulas Wong, start of version 1.0 records *
* Davis Pan *
* 5/10/91 W. Joseph Carter Reorganized & renamed all ".h" files *
* into "common.h" and "encoder.h". *
* Ported to Macintosh and Unix. *
* Added additional type definitions for *
* AIFF, double/SANE and "bitstream.c". *
* Added function prototypes for more *
* rigorous type checking. *
* 27jun91 dpwe (Aware) Added "alloc_*" defs & prototypes *
* Defined new struct 'frame_params'. *
* Changed info.stereo to info.mode_ext *
* #define constants for mode types *
* Prototype arguments if PROTO_ARGS *
* 5/28/91 Earle Jennings added MS_DOS definition *
* MsDos function prototype declarations *
* 7/10/91 Earle Jennings added FLOAT definition as double *
*10/ 3/91 Don H. Lee implemented CRC-16 error protection *
* 2/11/92 W. Joseph Carter Ported new code to Macintosh. Most *
* important fixes involved changing *
* 16-bit ints to long or unsigned in *
* bit alloc routines for quant of 65535 *
* and passing proper function args. *
* Removed "Other Joint Stereo" option *
* and made bitrate be total channel *
* bitrate, irrespective of the mode. *
* Fixed many small bugs & reorganized. *
* Modified some function prototypes. *
* Changed BUFFER_SIZE back to 4096. *
* 7/27/92 Michael Li (re-)Ported to MS-DOS *
* 7/27/92 Masahiro Iwadare Ported to Convex *
* 8/07/92 mc@tv.tek.com *
* 8/10/92 Amit Gulati Ported to the AIX Platform (RS6000) *
* AIFF string constants redefined *
* 8/27/93 Seymour Shlien, Fixes in Unix and MSDOS ports, *
* Daniel Lauzon, and *
* Bill Truerniet *
*--------------------------------------------------------------------*
* 4/23/92 J. Pineda Added code for Layer III. *
* 11/9/92 Amit Gulati Added defines for layerIII stereo *
* modes. *
* 8/24/93 Masahiro Iwadare Included IS modification in Layer III.*
* Changed for 1 pass decoding. *
* 9/07/93 Toshiyuki Ishino Integrated Layer III with Ver 3.9. *
*--------------------------------------------------------------------*
* 11/20/93 Masahiro Iwadare Integrated Layer III with Ver 4.0. *
*--------------------------------------------------------------------*
* 7/14/94 Juergen Koller Fix for HPUX an IRIX in AIFF-Strings *
**********************************************************************/
/***********************************************************************
*
* Global Conditional Compile Switches
*
***********************************************************************/
/* #define UNIX /* Unix conditional compile switch */
/* #define MACINTOSH /* Macintosh conditional compile switch */
/* #define MS_DOS /* IBM PC conditional compile switch */
/* #define MSC60 /* Compiled for MS_DOS with MSC v6.0 */
/* #define AIX /* AIX conditional compile switch */
/* #define CONVEX /* CONVEX conditional compile switch */
#if defined(MSC60)
#ifndef MS_DOS
#define MS_DOS
#endif
#ifndef PROTO_ARGS
#define PROTO_ARGS
#endif
#endif
#ifdef UNIX
#define TABLES_PATH "tables" /* to find data files */
/* name of environment variable holding path of table files */
#define MPEGTABENV "MPEGTABLES"
#define PATH_SEPARATOR "/" /* how to build paths */
#endif /* UNIX */
#ifdef MACINTOSH
/* #define TABLES_PATH ":tables:" /* where to find data files */
#endif /* MACINTOSH */
/*
* Don't define FAR to far unless you're willing to clean up the
* prototypes
*/
#define FAR /*far*/
#ifdef __STDC__
#ifndef PROTO_ARGS
#define PROTO_ARGS
#endif
#endif
#ifdef CONVEX
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif
/* MS_DOS and VMS do not define TABLES_PATH, so OpenTableFile will default
to finding the data files in the default directory */
/***********************************************************************
*
* Global Include Files
*
***********************************************************************/
#include <stdio.h>
#include <string.h>
#include <math.h>
#ifdef UNIX
#include <unistd.h>
#endif /* UNIX */
#ifdef MACINTOSH
#include <stdlib.h>
#include <console.h>
#endif /* MACINTOSH */
#ifdef MS_DOS
#include <stdlib.h>
#ifdef MSC60
#include <memory.h>
#else
#include <alloc.h>
#include <mem.h>
#endif /* MSC60 */
#endif /* MS_DOS */
/***********************************************************************
*
* Global Definitions
*
***********************************************************************/
/* General Definitions */
#ifdef MS_DOS
#define FLOAT double
#else
#define FLOAT float
#endif
#define FALSE 0
#define TRUE 1
#define NULL_CHAR '\0'
#define MAX_U_32_NUM 0xFFFFFFFF
#define PI 3.14159265358979
#define PI4 PI/4
#define PI64 PI/64
#define LN_TO_LOG10 0.2302585093
#define VOL_REF_NUM 0
#define MPEG_AUDIO_ID 1
#define MAC_WINDOW_SIZE 24
#define MONO 1
#define STEREO 2
#define BITS_IN_A_BYTE 8
#define WORD 16
#define MAX_NAME_SIZE 81
#define SBLIMIT 32
#define SSLIMIT 18
#define FFT_SIZE 1024
#define HAN_SIZE 512
#define SCALE_BLOCK 12
#define SCALE_RANGE 64
#define SCALE 32768
#define CRC16_POLYNOMIAL 0x8005
/* MPEG Header Definitions - Mode Values */
#define MPG_MD_STEREO 0
#define MPG_MD_JOINT_STEREO 1
#define MPG_MD_DUAL_CHANNEL 2
#define MPG_MD_MONO 3
/* Mode Extention */
#define MPG_MD_LR_LR 0
#define MPG_MD_LR_I 1
#define MPG_MD_MS_LR 2
#define MPG_MD_MS_I 3
/* AIFF Definitions */
/*
* Note: The value of a multi-character constant
* is implementation-defined.
*/
#if !defined(MS_DOS) && !defined(AIX) && !defined(__hpux) && !defined(sgi)
#define IFF_LONG
#define IFF_ID_FORM 'FORM'
#define IFF_ID_AIFF 'AIFF'
#define IFF_ID_COMM 'COMM'
#define IFF_ID_SSND 'SSND'
#define IFF_ID_MPEG 'MPEG'
#else
#define IFF_ID_FORM "FORM"
#define IFF_ID_AIFF "AIFF"
#define IFF_ID_COMM "COMM"
#define IFF_ID_SSND "SSND"
#define IFF_ID_MPEG "MPEG"
#endif
/* "bit_stream.h" Definitions */
#define MINIMUM 4 /* Minimum size of the buffer in bytes */
#define MAX_LENGTH 32 /* Maximum length of word written or
read from bit stream */
#define READ_MODE 0
#define WRITE_MODE 1
#define ALIGNING 8
#define BINARY 0
#define ASCII 1
#define BS_FORMAT ASCII /* BINARY or ASCII = 2x bytes */
#define BUFFER_SIZE 4096
#define MIN(A, B) ((A) < (B) ? (A) : (B))
#define MAX(A, B) ((A) > (B) ? (A) : (B))
/***********************************************************************
*
* Global Type Definitions
*
***********************************************************************/
/* Structure for Reading Layer II Allocation Tables from File */
typedef struct {
unsigned int steps;
unsigned int bits;
unsigned int group;
unsigned int quant;
} sb_alloc, *alloc_ptr;
typedef sb_alloc al_table[SBLIMIT][16];
/* Header Information Structure */
typedef struct {
int version;
int lay;
int error_protection;
int bitrate_index;
int sampling_frequency;
int padding;
int extension;
int mode;
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