www.pudn.com > ampegsrc.zip > DECODER.H
/**********************************************************************
Copyright (c) 1991 MPEG/audio software simulation group, All Rights Reserved
decoder.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, 708-538-5671, e-mail: pan@ukraine.corp.mot.com *
* *
* VERSION 4.3 *
* changes made since last update: *
* date programmers comment *
* 2/25/91 Doulas Wong, start of version 1.0 records *
* Davis Pan *
* 5/10/91 Vish (PRISM) Renamed and regrouped all ".h" files *
* into "common.h" and "decoder.h". *
* Ported to Macintosh and Unix. *
* 27jun91 dpwe (Aware) New prototype for out_fifo() *
* Moved "alloc_*" stuff to common.h *
* Use ifdef PROTO_ARGS for prototypes *
* prototypes reflect frame_params struct*
* 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. *
* 08/07/92 Mike Coleman Made small changes for portability *
* 9/07/93 Toshiyuki Ishino Integrated with Layer III. *
* 11/04/94 Jon Rowlands fix protos for usage() and *
* recover_CRC_error() *
**********************************************************************/
/***********************************************************************
*
* Decoder Include Files
*
***********************************************************************/
/***********************************************************************
*
* Decoder Definitions
*
***********************************************************************/
#define DFLT_OPEXT ".dec" /* default output file name extension */
/*
NOTE: The value of a multiple-character constant is
implementation-defined.
*/
#if !defined(MS_DOS) && !defined(AIX)
#define FILTYP_DEC_AIFF 'AIFF'
#define FILTYP_DEC_BNRY 'TEXT'
#define CREATR_DEC_AIFF 'Sd2a'
/*
The following character constant is ASCII '????'
It is declared in hex because the character
constant contains a trigraph, causing an error in
parsing with ANSI preprocessors.
*/
#define CREATR_DEC_BNRY 0x3f3f3f3f
#else
#define FILTYP_DEC_AIFF "AIFF"
#define FILTYP_DEC_BNRY "TEXT"
#define CREATR_DEC_AIFF "Sd2a"
#define CREATR_DEC_BNRY "????"
#endif
#define SYNC_WORD (long) 0xfff
#define SYNC_WORD_LNGTH 12
#define MUTE 0
/***********************************************************************
*
* Decoder Type Definitions
*
***********************************************************************/
/***********************************************************************
*
* Decoder Variable External Declarations
*
***********************************************************************/
/***********************************************************************
*
* Decoder Function Prototype Declarations
*
***********************************************************************/
/* The following functions are in the file "musicout.c" */
#ifdef PROTO_ARGS
static void usage(void);
#else
static void usage();
#endif
/* The following functions are in the file "decode.c" */
#ifdef PROTO_ARGS
extern void decode_info(Bit_stream_struc*, frame_params*);
extern void II_decode_bitalloc(Bit_stream_struc*, unsigned int[2][SBLIMIT],
frame_params*);
extern void I_decode_bitalloc(Bit_stream_struc*, unsigned int[2][SBLIMIT],
frame_params*);
extern void I_decode_scale(Bit_stream_struc*, unsigned int[2][SBLIMIT],
unsigned int[2][3][SBLIMIT], frame_params*);
extern void II_decode_scale(Bit_stream_struc*, unsigned int[2][SBLIMIT],
unsigned int[2][SBLIMIT], unsigned int[2][3][SBLIMIT],
frame_params*);
extern void I_buffer_sample(Bit_stream_struc*, unsigned int[2][3][SBLIMIT],
unsigned int[2][SBLIMIT], frame_params*);
extern void II_buffer_sample(Bit_stream_struc*, unsigned int[2][3][SBLIMIT],
unsigned int[2][SBLIMIT], frame_params*);
extern void read_quantizer_table(double[17], double[17]);
extern void II_dequantize_sample(unsigned int[2][3][SBLIMIT],
unsigned int[2][SBLIMIT], double[2][3][SBLIMIT],
frame_params*);
extern void I_dequantize_sample(unsigned int[2][3][SBLIMIT],
double[2][3][SBLIMIT], unsigned int[2][SBLIMIT],
frame_params*);
extern void read_scale_factor(double[SCALE_RANGE]);
extern void II_denormalize_sample(double[2][3][SBLIMIT],
unsigned int[2][3][SBLIMIT], frame_params*, int);
extern void I_denormalize_sample(double[2][3][SBLIMIT],
unsigned int[2][3][SBLIMIT], frame_params*);
extern void create_syn_filter(double[64][SBLIMIT]);
extern int SubBandSynthesis (double*, int, short*);
extern void read_syn_window(double[HAN_SIZE]);
extern void window_sample(double*, double*);
extern void out_fifo(short[2][SSLIMIT][SBLIMIT], int, frame_params*, int,
FILE*, unsigned long*);
extern void buffer_CRC(Bit_stream_struc*, unsigned int*);
extern void recover_CRC_error(short[2][SSLIMIT][SBLIMIT], int, frame_params*,
FILE*, unsigned long*);
extern void III_dequantize_sample(long int[SBLIMIT][SSLIMIT],
double [SBLIMIT][SSLIMIT], III_scalefac_t *,
struct gr_info_s *, int, frame_params *);
extern void III_antialias(double[SBLIMIT][SSLIMIT], double[SBLIMIT][SSLIMIT],
struct gr_info_s *, frame_params *);
extern void inv_mdct(double[18], double[36], int);
extern void III_hybrid(double[SSLIMIT], double[SSLIMIT] , int, int,
struct gr_info_s *, frame_params *);
#else
extern void decode_info();
extern void II_decode_bitalloc();
extern void I_decode_bitalloc();
extern void I_decode_scale();
extern void II_decode_scale();
extern void I_buffer_sample();
extern void II_buffer_sample();
extern void read_quantizer_table();
extern void II_dequantize_sample();
extern void I_dequantize_sample();
extern void read_scale_factor();
extern void II_denormalize_sample();
extern void I_denormalize_sample();
extern void create_syn_filter();
extern int SubBandSynthesis ();
extern void read_syn_window();
extern void window_sample();
extern void out_fifo();
extern void buffer_CRC();
extern void recover_CRC_error();
extern void III_dequantize_sample();
extern void III_antialias();
extern void inv_mdct();
extern void III_hybrid();
#endif