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DECODER.H
资源名称：mpeg.zip [点击查看]
上传用户：njqiyou
上传日期：2007-01-08
资源大小：574k
文件大小：12k
源码类别：
mpeg/mp3
开发平台：
C/C++
- /**********************************************************************
- * Copyright (c) 1995 MPEG/audio software simulation group
- * All Rights Reserved
- * $Id: decoder.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: decoder.h,v $
- * Revision 1.1 1996/04/18 03:39:59 rowlands
- * Initial revision
- *
- * 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: +49 30 6708 2406 *
- * Fax: +49 30 6774 539 *
- * *
- * 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: +49 30 6708 2406 *
- * Fax: +49 30 6774 539 *
- * *
- **********************************************************************/
- /***********************************************************************
- *
- * Decoder Include Files
- *
- ***********************************************************************/
- /***********************************************************************
- *
- * Decoder Definitions
- *
- ***********************************************************************/
- #define DFLT_OPEXT ".dec" /* default output file name extension */
- #define DFLT_OPEXT_EXT ".ext" /* default input for extension file */
- #define FILTYP_DEC_AIFF "AIFF" /* '-> " . 7/13/92. sr */
- #define FILTYP_DEC_BNRY "TEXT" /* '-> " . 7/13/92. sr */
- #define CREATR_DEC_AIFF "Sd2a" /* '-> " . 7/13/92. sr */
- #define CREATR_DEC_BNRY "????" /* '-> " . 7/13/92. sr */
- #define SYNC_WORD (long) 0xfff
- #define SYNC_WORD_LNGTH 12
- #define MUTE 0
- #define STEP 0.03125 /* 13.10.93 R.S. step for prediction */
- #define PREDDEL (2+7) /* max. delay in prediction, HP 08-nov-94 */
- /***********************************************************************
- *
- * Decoder Type Definitions
- *
- ***********************************************************************/
- /***********************************************************************
- *
- * Decoder Variable External Declarations
- *
- ***********************************************************************/
- extern int bits_in_frame;
- extern unsigned long frameNum;
- extern unsigned int ext_length;
- /***********************************************************************
- *
- * Decoder Function Prototype Declarations
- *
- ***********************************************************************/
- /* The following functions are in the file "musicout.c" */
- #ifdef PROTO_ARGS
- extern void usage(void);
- #else
- extern 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[5][SBLIMIT],
- frame_params*, int*, int*);
- extern void II_decode_scale(Bit_stream_struc*, unsigned int[5][SBLIMIT],
- unsigned int[5][SBLIMIT], unsigned int[5][3][SBLIMIT],
- frame_params*, int*, int*);
- extern void II_buffer_sample(Bit_stream_struc*, unsigned int[5][3][SBLIMIT],
- unsigned int[5][SBLIMIT], frame_params*);
- extern void II_buffer_samplemc(Bit_stream_struc*, unsigned int[5][3][SBLIMIT],
- unsigned int[5][SBLIMIT], frame_params*, int*);
- extern void read_quantizer_table(double[17], double[17]);
- extern void II_dequantize_sample(unsigned int[5][3][SBLIMIT],
- unsigned int[5][SBLIMIT], double[5][SBLIMIT][3][12],
- frame_params*, int*);
- extern void II_dequantize_samplemc(unsigned int[5][3][SBLIMIT],
- unsigned int[5][SBLIMIT], double[5][SBLIMIT][3][12],
- frame_params*, int*, int*);
- extern void read_scale_factor(double[SCALE_RANGE]);
- extern void II_denormalize_sample(double[5][SBLIMIT][3][12],
- unsigned int[5][3][SBLIMIT], frame_params*, int, int*);
- extern void II_denormalize_samplemc(double[5][SBLIMIT][3][12],
- unsigned int[5][3][SBLIMIT], frame_params*, int, int*,
- int*);
- extern void create_syn_filter(double[64][SBLIMIT]);
- extern int SubBandSynthesis (double*, int, long*);
- extern void read_syn_window(double[HAN_SIZE]);
- extern void window_sample(double*, double*);
- extern void out_fifo(long[5][3][SBLIMIT], int, frame_params*, int, FILE*,
- unsigned long*);
- extern void buffer_CRC(Bit_stream_struc*, unsigned int*);
- extern void recover_CRC_error(long[5][3][SBLIMIT], int, frame_params*,
- FILE*, unsigned long*);
- extern void mc_header(Bit_stream_struc*, frame_params*);
- extern int mc_ext_header(void);
- extern int mc_ext_error_check(void);
- extern void mc_composite_status_info(Bit_stream_struc*, frame_params*);
- extern
- void
- dematricing(
- double (*pcm_sample)[SBLIMIT][3][12],
- frame_params *fr_ps,
- double (*pred_buf)[8][36+PREDDEL]
- );
- #else
- extern void decode_info();
- extern void II_decode_bitalloc();
- extern void II_decode_scale();
- extern void II_buffer_sample();
- extern void read_quantizer_table();
- extern void II_dequantize_sample();
- extern void read_scale_factor();
- extern void II_denormalize_sample();
- extern void create_syn_filter();
- extern int SubBandSynthesis ();
- extern void read_syn_window();
- extern void window_sample();
- extern void out_fifo();
- extern int mc_ext_header();
- extern int mc_ext_error_check();
- extern void buffer_CRC();
- extern void recover_CRC_error();
- #endif
