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#ifndef COMMON_DOT_H
#define COMMON_DOT_H
/***********************************************************************
*
* Global Conditional Compile Switches
*
***********************************************************************/
#if 0
#define UNIX /* Unix conditional compile switch */
#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 */
/*
* 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
/***********************************************************************
*
* Global Include Files
*
***********************************************************************/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "portableio.h"
#include "ieeefloat.h"
#ifdef UNIX
#include <unistd.h>
#endif /* UNIX */
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
/***********************************************************************
*
* Global Definitions
*
***********************************************************************/
/* General Definitions */
#define FLOAT float
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#define NULL_CHAR '\0'
#define MAX_U_32_NUM 0xFFFFFFFF
#ifndef PI
#define PI 3.14159265358979
#endif
#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 MPEG_PHASE2_LSF 0 /* 1995-07-11 SHN */
#define MAC_WINDOW_SIZE 24
#define MONO 1
#define STEREO 2
#define BITS_IN_A_BYTE 8
#define WORD 16
#define MAX_NAME_SIZE 255
#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
/* "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 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;
int mode_ext;
int copyright;
int original;
int emphasis;
} layer, *the_layer;
/* Parent Structure Interpreting some Frame Parameters in Header */
typedef struct {
layer *header; /* raw header information */
int actual_mode; /* when writing IS, may forget if 0 chs */
al_table *alloc; /* bit allocation table read in */
int tab_num; /* number of table as loaded */
int stereo; /* 1 for mono, 2 for stereo */
int jsbound; /* first band of joint stereo coding */
int sblimit; /* total number of sub bands */
} frame_params;
/* AIFF Definitions */
#define IFF_ID_FORM 0x464f524d /* "FORM" */
#define IFF_ID_AIFF 0x41494646 /* "AIFF" */
#define IFF_ID_COMM 0x434f4d4d /* "COMM" */
#define IFF_ID_SSND 0x53534e44 /* "SSND" */
#define IFF_ID_MPEG 0x4d504547 /* "MPEG" */
#define AIFF_FORM_HEADER_SIZE 12
#define AIFF_SSND_HEADER_SIZE 16
typedef struct blockAlign_struct {
unsigned long offset;
unsigned long blockSize;
} blockAlign;
typedef struct IFF_AIFF_struct {
short numChannels;
unsigned long numSampleFrames;
short sampleSize;
double sampleRate;
unsigned long sampleType;
blockAlign blkAlgn;
} IFF_AIFF;
enum byte_order { order_unknown, order_bigEndian, order_littleEndian };
extern enum byte_order NativeByteOrder;
/* "bit_stream.h" Type Definitions */
typedef struct bit_stream_struc {
FILE *pt; /* pointer to bit stream device */
unsigned char *buf; /* bit stream buffer */
int buf_size; /* size of buffer (in number of bytes) */
long totbit; /* bit counter of bit stream */
int buf_byte_idx; /* pointer to top byte in buffer */
int buf_bit_idx; /* pointer to top bit of top byte in buffer */
int mode; /* bit stream open in read or write mode */
int eob; /* end of buffer index */
int eobs; /* end of bit stream flag */
char format;
/* format of file in rd mode (BINARY/ASCII) */
} Bit_stream_struc;
/***********************************************************************
*
* Global Variable External Declarations
*
***********************************************************************/
extern char *mode_names[4];
extern char *version_names[2];
extern double s_freq[2][4];
extern int bitrate[2][15];
extern double FAR multiple[64];
/***********************************************************************
*
* Global Function Prototype Declarations
*
***********************************************************************/
/* common.c */
extern int js_bound(int);
extern void hdr_to_frps(frame_params*);
extern int BitrateIndex(int, int);
extern int SmpFrqIndex(long, int*);
extern void new_ext(char *filename, char *extname, char *newname);
/* tables.c */
extern FILE *OpenTableFile(char*);
extern int read_bit_alloc(int, al_table*);
extern int pick_table(frame_params*);
/* bitstream.c */
extern int refill_buffer(Bit_stream_struc*);
extern void empty_buffer(Bit_stream_struc*, int);
extern void open_bit_stream_w(Bit_stream_struc*, char*, int);
extern void close_bit_stream_w(Bit_stream_struc*);
extern void alloc_buffer(Bit_stream_struc*, int);
extern void desalloc_buffer(Bit_stream_struc*);
extern void back_track_buffer(Bit_stream_struc*, int);
extern unsigned int get1bit(Bit_stream_struc*);
extern void put1bit(Bit_stream_struc*, int);
extern unsigned long look_ahead(Bit_stream_struc*, int);
extern unsigned long getbits(Bit_stream_struc*, int);
extern void putbits(Bit_stream_struc*, unsigned int, int);
extern void byte_ali_putbits(Bit_stream_struc*, unsigned int, int);
extern unsigned long byte_ali_getbits(Bit_stream_struc*, int);
extern unsigned long sstell(Bit_stream_struc*);
extern int end_bs(Bit_stream_struc*);
extern int seek_sync(Bit_stream_struc*, long, int);
extern unsigned int hget1bit(void); /* MI */
extern unsigned long hgetbits(int);
extern unsigned long hsstell(void);
extern void hputbuf(unsigned int,int);
/* mem.c */
extern void FAR *mem_alloc(unsigned long, char*);
extern void mem_free(void**);
/* crc.c */
extern void CRC_calc(frame_params*, unsigned int[2][SBLIMIT],
unsigned int[2][SBLIMIT], unsigned int*);
extern void update_CRC(unsigned int, unsigned int, unsigned int*);
/* get_audio.c */
extern int aiff_read_headers(FILE*, IFF_AIFF*);
extern int aiff_seek_to_sound_data(FILE*);
extern enum byte_order DetermineByteOrder(void);
extern void SwapBytesInWords( short *loc, int words );
/* psycho_II.c */
extern void read_absthr(FLOAT*, int);
#endif
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