typedef sb_alloc        al_table[SBLIMIT][16];/* Header Information Structure */typedef struct {	int version;	int lay;	int error_protection;	int bitrate_index;	int bitrate_index1;	int bitrate_index2;	int sampling_frequency;	int padding;	int extension;	int mode;	int mode_ext;	int copyright;	int original;	int emphasis;	int center;		   /* center present */	int surround; 		   /* surrounds present*/	int dematrix_procedure;	   /* type of dematricing */	int lfe;		   /* low freequency effect channel*/	int audio_mix;		   /* large or small room */	int no_of_multi_lingual_ch;/* number of multilingual channels */	int multi_lingual_fs;	   /* fs of main channels and ML-fs are the same*/	int multi_lingual_layer;   /* Layer IIML or Layer II ML is used*/	int mc_prediction[8];	   /* prediction bit *//* 28.9. R.S. changed name and length like DIS*/	int mc_pred_coeff[8][4][3];/* bits for prediction coefficient */	int tc_alloc[12];	   /* transmission channel allocation in each sbgroup*/	int mc_predsi[8][4];	   /* predictor select information*/	int mc_delay_comp[8][4];   /* 3 bit for delay compensations factor */	int ext_bit_stream_present;	int copyright_ident_bit;   /* additional copyright bits */	int copyright_ident_start; /*                           */	int n_ad_bytes;		int ad_bytes_crc_info;	   /* for MC-CRC -check 7.12.94 R.S */	int mc_prediction_on;	   	int tc_sbgr_select;	int dyn_cross_on;	int dyn_cross_LR;	int dyn_cross_mode[12];	int dyn_second_stereo;	int tc_allocation;	int ext_syncword;         /* 12 bits */	int ext_crc_check;        /* 16 bits */	int ext_length;           /* 11 bits *//* Important!! in bits per frame */	int reserved_bit;unsigned int ext_crc_bits[15];} 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		mc_channel;	int		jsbound; 		/* first band of joint stereo coding */	double	mnr_min;		/* mnr for dynamic bitallocation */	int		sblimit;	    /* total number of sub bands */} frame_params;/* Double and SANE Floating Point Type Definitions */typedef struct  IEEE_DBL_struct {				unsigned long   hi;				unsigned long   lo;} IEEE_DBL;typedef struct  SANE_EXT_struct {				unsigned long   l1;				unsigned long   l2;				unsigned short  s1;} SANE_EXT;/* AIFF Type Definitions */typedef char	 ID[4];typedef struct  identifier_struct{		 ID name;		 long ck_length;}identifier;typedef struct  ChunkHeader_struct {				ID      ckID;				long    ckSize;} ChunkHeader;typedef struct  Chunk_struct {				ID      ckID;				long    ckSize;				ID      formType;} Chunk;typedef struct  CommonChunk_struct {				ID              ckID;				long            ckSize;				short           numChannels;				unsigned long   numSampleFrames;				short           sampleSize;				char            sampleRate[10];} CommonChunk;typedef struct  SoundDataChunk_struct {				ID              ckID;				long            ckSize;				unsigned long   offset;				unsigned long   blockSize;} SoundDataChunk;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;                ID/*char**/     sampleType;/*must be allocated 21.6.93 SR*/                blockAlign      blkAlgn;} IFF_AIFF;/* "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 Bit_stream_struc  bs_ext;extern layer    info;extern int	read_from_ext;extern char     *mode_names[4];extern char     *layer_names[3];extern double   s_freq[4];extern int	bitrate[3][15];extern double	multiple[64];extern int      sb_groups[12];extern unsigned char bs_tmp_buf[50];/*************************************************************************  Global Function Prototype Declarations************************************************************************//* The following functions are in the file "common.c" */#ifdef  PROTO_ARGSextern FILE           *OpenTableFile(char*);extern int            read_bit_alloc(int, al_table*);extern int            pick_table(frame_params*);extern int            js_bound(int, int);extern void           hdr_to_frps(frame_params*);extern void           WriteHdr(frame_params*, FILE*);extern void           WriteBitAlloc(unsigned int[2][SBLIMIT], frame_params*,								FILE*);extern void           WriteScale(unsigned int[2][SBLIMIT],                        unsigned int[2][SBLIMIT], unsigned int[2][3][SBLIMIT],						frame_params*, FILE*);extern void           WriteSamples(int, unsigned int/*far*/[SBLIMIT],						unsigned int[SBLIMIT], frame_params*, FILE*);extern int            NumericQ(char*);extern int            BitrateIndex(int, int);extern int            SmpFrqIndex(long);extern int            memcheck(char*, int, int);extern void           *mem_alloc(unsigned long, char*);extern void           mem_free(void**);extern void           double_to_extended(double*, char[10]);extern void           extended_to_double(char[10], double*);extern int	      aiff_read_headers(FILE*, IFF_AIFF*, int*);extern int	      aiff_seek_to_sound_data(FILE*);extern int            aiff_write_headers(FILE*, IFF_AIFF*);extern void           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 int            open_bit_stream_r(Bit_stream_struc*, char*, int);extern void           close_bit_stream_r(Bit_stream_struc*);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 void 	      skipbits(Bit_stream_struc *, unsigned int);extern void 	      skip_ext_bits(Bit_stream_struc *, unsigned int);extern unsigned int   get1bit(Bit_stream_struc*);extern unsigned int   local_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 unsigned int   local_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 void           I_CRC_calc(frame_params*, unsigned int[2][SBLIMIT],						unsigned int*);extern void           II_CRC_calc(frame_params*, unsigned int[5][SBLIMIT],						unsigned int[5][SBLIMIT], unsigned int*);extern void           mc_error_check(frame_params*, unsigned int[7][SBLIMIT],						unsigned int[7][SBLIMIT], unsigned int*);extern int	      mc_ext_error_check(void);extern void           update_CRC(unsigned int, unsigned int, unsigned int*);extern void           read_absthr(FLOAT*, long);extern void	      program_information(void);extern int 	      js_bound1(int, int);	/* other bounderies for multichannel*/#ifdef  MACINTOSHextern void           set_mac_file_attr(char[MAX_NAME_SIZE], short, OsType,						OsType);#endif#ifdef  MS_DOSextern char           *new_ext(char *filename, char *extname); /* 92-08-19 shn */#endif#elseextern FILE           *OpenTableFile();extern int            read_bit_alloc();extern int            pick_table();extern int            js_bound();extern void           hdr_to_frps();extern void           WriteHdr();extern void           WriteBitAlloc();extern void           WriteScale();extern void           WriteSamples();extern int            NumericQ();extern int            BitrateIndex();extern int            SmpFrqIndex();extern int            memcheck();extern void           *mem_alloc();extern void           mem_free();extern void           double_to_extended();extern void           extended_to_double();extern int            aiff_read_headers();extern int            aiff_seek_to_sound_data();extern int            aiff_write_headers();extern void           refill_buffer();extern void           empty_buffer();extern void           open_bit_stream_w();extern int            open_bit_stream_r();extern void           close_bit_stream_r();extern void           close_bit_stream_w();extern void           alloc_buffer();extern void           desalloc_buffer();extern void           back_track_buffer();extern int            mc_ext_header();extern int    	      mc_ext_error_check();extern unsigned int   get1bit();extern void           put1bit();extern unsigned long  look_ahead();extern unsigned long  getbits();extern void           putbits();extern void           byte_ali_putbits();extern unsigned long  byte_ali_getbits();extern unsigned long  sstell();extern int            end_bs();extern int            seek_sync();extern void           I_CRC_calc();extern void           II_CRC_calc();extern void           update_CRC();extern void           read_absthr();extern void	      program_information();#ifdef  MSDOSextern char           *new_ext(); /* 92-08-19 shn */#endif#endif#ifdef CONCATBit_stream_struc   bs_concat;	/*23/03/1995 JMZ Concat */#endif CONCAT