COMMON.H
资源名称:ampegsrc.zip [点击查看]
上传用户:dshsh2009
上传日期:2007-01-07
资源大小:155k
文件大小:17k
源码类别:
mpeg/mp3
开发平台:
Unix_Linux
- /**********************************************************************
- 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, 508-493-2241, e-mail: pan@gauss.enet.dec.com *
- * *
- * VERSION 4.0 *
- * 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 *
- **********************************************************************/
- /***********************************************************************
- *
- * 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 ' '
- #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
- #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
- /* AIFF Definitions */
- /*
- * Note: The value of a multi-character constant
- * is implementation-defined.
- */
- #if !defined(MS_DOS) && !defined(AIX)
- #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 BINARY /* 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;
- 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;
- /* 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 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;
- unsigned long sampleType;
- 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 char *mode_names[4];
- extern char *layer_names[3];
- extern double s_freq[4];
- extern int bitrate[3][15];
- extern double FAR multiple[64];
- /***********************************************************************
- *
- * Global Function Prototype Declarations
- *
- ***********************************************************************/
- /* The following functions are in the file "common.c" */
- #ifdef PROTO_ARGS
- extern 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 FAR *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*);
- extern int aiff_seek_to_sound_data(FILE*);
- extern int aiff_write_headers(FILE*, IFF_AIFF*);
- 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 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 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 void I_CRC_calc(frame_params*, unsigned int[2][SBLIMIT],
- unsigned int*);
- extern void II_CRC_calc(frame_params*, unsigned int[2][SBLIMIT],
- unsigned int[2][SBLIMIT], unsigned int*);
- extern void update_CRC(unsigned int, unsigned int, unsigned int*);
- extern void read_absthr(FLOAT*, int);
- #ifdef MACINTOSH
- extern void set_mac_file_attr(char[MAX_NAME_SIZE], short, OsType,
- OsType);
- #endif
- #ifdef MS_DOS
- extern char *new_ext(char *filename, char *extname);
- #endif
- #else
- extern 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 FAR *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 int refill_buffer();
- extern void empty_buffer();
- extern void open_bit_stream_w();
- extern void 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 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();
- #ifdef MS_DOS
- extern char *new_ext();
- #endif
- #endif