common.h

ISO mp3 sources (distribution 10) Layer 1/2/3, C Source, 512 k Sources of the Mpeg 1,2 layer 1,2

/**********************************************************************
 * Copyright (c) 1995 MPEG/audio software simulation group
 * All Rights Reserved
 * $Id: common.h,v 1.1 1996/04/18 03:39:59 rowlands Exp $
 *
 * MPEG/audio coding/decoding software, work in progress
 *   NOT for public distribution until verified and approved by the
 *   MPEG/audio committee.
 *
 * $Log: common.h,v $
 * Revision 1.1  1996/04/18 03:39:59  rowlands
 * Initial revision
 *
 * Revision 1.4  1995/04/06  05:49:24  rowlands
 * Moved machine #define to makefile
 *
 * Revision 1.3  1995/04/06  05:01:42  rowlands
 * Ran decoder through protoize to convert to ANSI C.
 *
 * Revision 1.2  1995/04/06  04:56:00  rowlands
 * Added header, RCS info and cleaned up prototypes in initial revision.
 *
 **********************************************************************/

/**********************************************************************
 * VERSION 2.5                                                        *
 *   changes made since last update:                                  *
 *   date   programmers                comment                        *
 * 2/25/91  Douglas Wong        start of version 1.0 records          *
 * 3/06/91  Douglas Wong        rename setup.h to dedef.h             *
 *                              removed extraneous variables          *
 *                              removed window_samples (now part of   *
 *                              filter_samples)                       *
 * 3/07/91  Davis Pan           changed output file to "codmusic"     *
 * 5/10/91  Vish (PRISM)        Ported to Macintosh and Unix.         *
 *                              Incorporated new "out_fifo()" which   *
 *                              writes out last incomplete buffer.    *
 *                              Incorporated all AIFF routines which  *
 *                              are also compatible with SUN.         *
 *                              Incorporated user interface for       *
 *                              specifying sound file names.          *
 *                              Also incorporated user interface for  *
 *                              writing AIFF compatible sound files.  *
 * 27jun91  dpwe (Aware)        Added musicout and &sample_frames as  *
 *                              args to out_fifo (were glob refs).    *
 *                              Used new 'frame_params' struct.       *
 *                              Clean,simplify, track clipped output  *
 *                              and total bits/frame received.        *
 * 7/10/91  Earle Jennings      changed to floats to FLOAT            *
 *10/ 1/91  S.I. Sudharsanan,   Ported to IBM AIX platform.           *
 *          Don H. Lee,                                               *
 *          Peter W. Farrett                                          *
 *10/ 3/91  Don H. Lee          implemented CRC-16 error protection   *
 *                              newly introduced functions are        *
 *                              buffer_CRC and recover_CRC_error      *
 *                              Additions and revisions are marked    *
 *                              with "dhl" for clarity                *
 * 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.  *
 **********************************************************************
 *                                                                    *
 *                                                                    *
 *  MPEG/audio Phase 2 coding/decoding multichannel                   *
 *                                                                    *
 *  Version 1.0                                                       *
 *                                                                    *
 *  7/27/93        Susanne Ritscher,  IRT Munich                      *
 *                                                                    *
 *                  thanks to                                         *
 *                  Ralf Schwalbe,    Telekom FTZ Berlin              *
 *                  Heiko Purnhagen,  Uni Hannover                    *
 *                                                                    *
 *  Version 2.0                                                       *
 *                                                                    *
 *  8/27/93        Susanne Ritscher, IRT Munich                       *
 *                 Channel-Switching is working                       *
 *                                                                    *
 *  Version 2.1                                                       *
 *                                                                    *
 *  9/1/93         Susanne Ritscher,  IRT Munich                      *
 *                 all channels normalized                            *
 *                                                                    *
 *  Version 3.0                                                       *
 *                                                                    *
 *  06/16/94       Ralf Schwalbe, Telekom FTZ Berlin                  *
 *                 all sources and variables adapted due to MPEG-2 -  *
 *                 DIS from March 1994                                *
 *                  - dematrix and denormalize procedure              *
 *                  - new tc - allocation (0-7)                       *
 *                  - some new structures and variables as a basis    *
 *                    for further decoding modes                      *
 **********************************************************************
 *								      *
 *  Version 1.0 Shareware                                             *
 *                                                                    *
 *  07/12/94       Ralf Schwalbe,  Telekom FTZ Berlin                 *
 *                 Tel: [phone]                              *
 *                 Fax: [phone]                               *
 *								      *
 *  04/11/94	   Ralf Schwalbe. Telekom FTZ Berlin                  *
 *                  - decoding extension bitstream                    *
 *                  - some new subroutines, globale variables and     *
 *                    structures (important to handle the ext. bitst.)*
 *                  - changed all functions to ANSI-C funktion header *
 *		    - corrected some bugs to decode bitstreams > 512kB*
 *								      *
 *  Version 1.1 Shareware                                             *
 *                                                                    *
 *  07/12/94       Ralf Schwalbe,  Telekom FTZ Berlin                 *
 *                 Tel: [phone]                              *
 *                 Fax: [phone]                               *
 *								      *
 **********************************************************************/

#define VERSION "1.1"  /* R.S for Shareware */


/***********************************************************************
*
*  Global Conditional Compile Switches
*
***********************************************************************/
/*#define PRINTOUT*/
/*#define UNIX	        */ 	 /* Unix conditional compile switch */
/*#define MACINTOSH	*/	 /* Macintosh conditional compile switch */
/*#define MS_DOS	*/	 /* IBM PC conditional compile switch
				   Microsoft C ver. 6.0 */


#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 */
#define      PROTO_ARGS                 /* unix gcc uses arg. prototypes */
#endif  /* UNIX */

#ifdef  MACINTOSH
/* #define      TABLES_PATH ":tables:"  /* where to find data files */
#define         PROTO_ARGS              /* Mac uses argument prototypes */
#endif  /* MACINTOSH */

#ifdef  MS_DOS
#define         PROTO_ARGS  /* DOS uses argument prototypes */
#endif  /* MS_DOS */


/* 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>	 /* removed 92-08-05 shn */
#include	<stdlib.h>       /* put in 92-08-05 shn */
#endif  /* UNIX */

#ifdef  MACINTOSH
#include        <stdlib.h>
#include        <console.h>
#endif  /* MACINTOSH */

#ifdef  MS_DOS
/* #include	<alloc.h> */ /* removed 92-07-08 sr */
#include	<malloc.h>   /* put in 92-07-08 sr */
/* #include	<mem.h> */   /* removed 92-07-08 sr */
#include <stdlib.h>
#endif  /* MS_DOS */


#define	SEEK_SET	0
#define	SEEK_CUR	1
#define	SEEK_END	2


/***********************************************************************
*
*  Global Definitions
*
***********************************************************************/
extern int pred_coef_table[8][14];  /* def. in decode.c */
extern int read_ext_header,ext_error;
extern unsigned long frameNum,ext_total;
/* General Definitions */

#ifdef  MS_DOS
#define         FLOAT                   double
#else
#define         FLOAT                   float
#endif

#define         FALSE                   0
#define         TRUE                    (!FALSE)
#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         FFT_SIZE                1024
#define         HAN_SIZE                512
#define         SCALE_BLOCK             12
#define         SCALE_RANGE             64
#define         SCALE                   32768.0
#define         CRC16_POLYNOMIAL        0x8005

/* Sync - Word for multichannel extern bitstream */
#define		EXT_SYNCWORD	        0x7ff

/* 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
#define		MPG_MD_NONE		4

/* Multi-channel Definitions - Mode Values */

#define		MPG_MC_STEREO 	       0
#define		MPG_MC_NONE	       6

/* AIFF Definitions */

#ifndef	MS_DOS
#define         IFF_ID_FORM             "FORM" /* HP400 unix v8.0: double qoutes 1992-07-24 shn */
#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;