common.h
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上传日期:2007-01-08
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文件大小:7k
- /*
- (c) Copyright 1998, 1999 - Tord Jansson
- =======================================
- This file is part of the BladeEnc MP3 Encoder, based on
- ISO's reference code for MPEG Layer 3 compression, and might
- contain smaller or larger sections that are directly taken
- from ISO's reference code.
- All changes to the ISO reference code herein are either
- copyrighted by Tord Jansson (tord.jansson@swipnet.se)
- or sublicensed to Tord Jansson by a third party.
- BladeEnc is free software; you can redistribute this file
- and/or modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- */
- #ifndef COMMON_DOT_H
- #define COMMON_DOT_H
- /***********************************************************************
- *
- * Global Include Files
- *
- ***********************************************************************/
- #include <stdio.h>
- #include <string.h>
- #include <math.h>
- #include "tables.h"
- #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 ' '
- #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 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_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 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 error_protection;
- int bitrate_index;
- int sampling_frequency;
- int padding;
- int extension;
- int mode;
- int mode_ext;
- int copyright;
- int original;
- int emphasis;
- /* int freq; */
- } 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;
- 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) */
- int 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;
- #include "l3side.h"
- /***********************************************************************
- *
- * Global Variable External Declarations
- *
- ***********************************************************************/
- /* extern char *mode_names[4];
- extern char *layer_names[3];
- extern char *version_names[2]; */
- extern double s_freq[2][4];
- extern int bitratex[2][15];
- /***********************************************************************
- *
- * Global Function Prototype Declarations
- *
- ***********************************************************************/
- /* The following functions are in the file "common.c" */
- extern void hdr_to_frps(frame_params *fr_ps); /* interpret data in hdr str to fields in fr_ps */
- extern void *mem_alloc(unsigned int block, char *item);
- extern void mem_free( void **ptr_addr);
- extern void read_absthr();
- #endif