English
ENCODER.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：15k
源码类别：
mpeg/mp3
开发平台：
C/C++
- /**********************************************************************
- * ISO MPEG Audio Subgroup Software Simulation Group (1996)
- * ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
- *
- * $Id: encoder.h,v 1.1 1996/02/14 04:04:23 rowlands Exp $
- *
- * $Log: encoder.h,v $
- * Revision 1.1 1996/02/14 04:04:23 rowlands
- * Initial revision
- *
- * Received from Mike Coleman
- **********************************************************************/
- /**********************************************************************
- * 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 function prototypes for more *
- * rigorous type checking. *
- * 27jun91 dpwe (Aware) moved "alloc_*" types, pros to common *
- * Use ifdef PROTO_ARGS for prototypes *
- * prototypes reflect frame_params struct*
- * 7/10/91 Earle Jennings Conversion of all floats to FLOAT *
- * 10/3/91 Don H. Lee implemented CRC-16 error protection *
- * 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. *
- * Modified some function prototypes. *
- * 7/27/92 Masahiro Iwadare FFT modifications for Layer 3 *
- * 8/3/92 Mike Li removed declaration _stklen for DOS. *
- * 9/22/92 jddevine@aware.com Fix protos for _scale_factor_calc() *
- * 11/04/94 Jon Rowlands Fix protos for usage() *
- * 07/11/95 Soeren H. Nielsen Changed defs. and protos for LSF *
- **********************************************************************/
- #ifndef ENCODER_DOT_H
- #define ENCODER_DOT_H
- /***********************************************************************
- *
- * Encoder Include Files
- *
- ***********************************************************************/
- /***********************************************************************
- *
- * Encoder Definitions
- *
- ***********************************************************************/
- /* General Definitions */
- /* Default Input Arguments (for command line control) */
- #define DFLT_LAY 2 /* default encoding layer is II */
- #define DFLT_MOD 's' /* default mode is stereo */
- #define DFLT_PSY 1 /* default psych model is 1 */
- #define DFLT_SFQ 44.1 /* default input sampling rate is 44.1 kHz */
- #define DFLT_EMP 'n' /* default de-emphasis is none */
- #define DFLT_EXT ".mpg" /* default output file extension */
- #define FILETYPE_ENCODE 'TEXT'
- #define CREATOR_ENCODE 'MpgD'
- /* This is the smallest MNR a subband can have before it is counted
- as 'noisy' by the logic which chooses the number of JS subbands */
- #define NOISY_MIN_MNR 0.0
- /* Psychacoustic Model 1 Definitions */
- #define CB_FRACTION 0.33
- #define MAX_SNR 1000
- #define NOISE 10
- #define TONE 20
- #define DBMIN -200.0
- #define LAST -1
- #define STOP -100
- #define POWERNORM 90.3090 /* = 20 * log10(32768) to normalize */
- /* max output power to 96 dB per spec */
- /* Psychoacoustic Model 2 Definitions */
- #define LOGBLKSIZE 10
- #define BLKSIZE 1024
- #define HBLKSIZE 513
- #define CBANDS 63
- #define LXMIN 32.0
- /***********************************************************************
- *
- * Encoder Type Definitions
- *
- ***********************************************************************/
- /* Psychoacoustic Model 1 Type Definitions */
- typedef int IFFT2[FFT_SIZE/2];
- typedef int IFFT[FFT_SIZE];
- typedef double D9[9];
- typedef double D10[10];
- typedef double D640[640];
- typedef double D1408[1408];
- typedef double DFFT2[FFT_SIZE/2];
- typedef double DFFT[FFT_SIZE];
- typedef double DSBL[SBLIMIT];
- typedef double D2SBL[2][SBLIMIT];
- typedef struct {
- int line;
- double bark, hear, x;
- } g_thres, *g_ptr;
- typedef struct {
- double x;
- int type, next, map;
- } mask, *mask_ptr;
- /* Psychoacoustic Model 2 Type Definitions */
- typedef int ICB[CBANDS];
- typedef int IHBLK[HBLKSIZE];
- typedef FLOAT F32[32];
- typedef FLOAT F2_32[2][32];
- typedef FLOAT FCB[CBANDS];
- typedef FLOAT FCBCB[CBANDS][CBANDS];
- typedef FLOAT FBLK[BLKSIZE];
- typedef FLOAT FHBLK[HBLKSIZE];
- typedef FLOAT F2HBLK[2][HBLKSIZE];
- typedef FLOAT F22HBLK[2][2][HBLKSIZE];
- typedef double DCB[CBANDS];
- /***********************************************************************
- *
- * Encoder Function Prototype Declarations
- *
- ***********************************************************************/
- /* The following functions are in the file "musicin.c" */
- #ifdef PROTO_ARGS
- extern void obtain_parameters(frame_params*, int*, unsigned long*,
- char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
- extern void parse_args(int, char**, frame_params*, int*, unsigned long*,
- char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
- extern void print_config(frame_params*, int*,
- char[MAX_NAME_SIZE], char[MAX_NAME_SIZE]);
- void usage(void);
- extern void aiff_check(char*, IFF_AIFF*, int*);
- #else
- extern void obtain_parameters();
- extern void parse_args();
- extern void print_config();
- static void usage();
- extern void aiff_check();
- #endif
- /* The following functions are in the file "encode.c" */
- #ifdef PROTO_ARGS
- extern unsigned long read_samples(FILE*, short[2304], unsigned long,
- unsigned long);
- #if 0
- extern unsigned long get_audio(FILE*, short[2][1152], unsigned long,
- int, int);
- #else
- extern unsigned long get_audio(FILE*, short[2][1152], unsigned long,
- int, layer* info);
- #endif
- extern void read_ana_window(double[HAN_SIZE]);
- extern void window_subband(short**, double[HAN_SIZE], int);
- extern void create_ana_filter(double[SBLIMIT][64]);
- extern void filter_subband(double[HAN_SIZE], double[SBLIMIT]);
- extern void encode_info(frame_params*, Bit_stream_struc*);
- extern double mod(double);
- extern void I_combine_LR(double[2][3][SCALE_BLOCK][SBLIMIT],
- double[3][SCALE_BLOCK][SBLIMIT]);
- extern void II_combine_LR(double[2][3][SCALE_BLOCK][SBLIMIT],
- double[3][SCALE_BLOCK][SBLIMIT], int);
- extern void I_scale_factor_calc(double[][3][SCALE_BLOCK][SBLIMIT],
- unsigned int[][3][SBLIMIT], int);
- extern void II_scale_factor_calc(double[][3][SCALE_BLOCK][SBLIMIT],
- unsigned int[][3][SBLIMIT], int, int);
- extern void pick_scale(unsigned int[2][3][SBLIMIT], frame_params*,
- double[2][SBLIMIT]);
- extern void put_scale(unsigned int[2][3][SBLIMIT], frame_params*,
- double[2][SBLIMIT]);
- extern void II_transmission_pattern(unsigned int[2][3][SBLIMIT],
- unsigned int[2][SBLIMIT], frame_params*);
- extern void II_encode_scale(unsigned int[2][SBLIMIT],
- unsigned int[2][SBLIMIT],
- unsigned int[2][3][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern void I_encode_scale(unsigned int[2][3][SBLIMIT],
- unsigned int[2][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern int II_bits_for_nonoise(double[2][SBLIMIT], unsigned int[2][SBLIMIT],
- frame_params*);
- extern void II_main_bit_allocation(double[2][SBLIMIT],
- unsigned int[2][SBLIMIT], unsigned int[2][SBLIMIT],
- int*, frame_params*);
- extern int II_a_bit_allocation(double[2][SBLIMIT], unsigned int[2][SBLIMIT],
- unsigned int[2][SBLIMIT], int*, frame_params*);
- extern int I_bits_for_nonoise(double[2][SBLIMIT], frame_params*);
- extern void I_main_bit_allocation(double[2][SBLIMIT],
- unsigned int[2][SBLIMIT], int*, frame_params*);
- extern int I_a_bit_allocation(double[2][SBLIMIT], unsigned int[2][SBLIMIT],
- int*, frame_params*);
- extern void I_subband_quantization(unsigned int[2][3][SBLIMIT],
- double[2][3][SCALE_BLOCK][SBLIMIT], unsigned int[3][SBLIMIT],
- double[3][SCALE_BLOCK][SBLIMIT], unsigned int[2][SBLIMIT],
- unsigned int[2][3][SCALE_BLOCK][SBLIMIT], frame_params*);
- extern void II_subband_quantization(unsigned int[2][3][SBLIMIT],
- double[2][3][SCALE_BLOCK][SBLIMIT], unsigned int[3][SBLIMIT],
- double[3][SCALE_BLOCK][SBLIMIT], unsigned int[2][SBLIMIT],
- unsigned int[2][3][SCALE_BLOCK][SBLIMIT], frame_params*);
- extern void II_encode_bit_alloc(unsigned int[2][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern void I_encode_bit_alloc(unsigned int[2][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern void I_sample_encoding(unsigned int[2][3][SCALE_BLOCK][SBLIMIT],
- unsigned int[2][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern void II_sample_encoding(unsigned int[2][3][SCALE_BLOCK][SBLIMIT],
- unsigned int[2][SBLIMIT], frame_params*,
- Bit_stream_struc*);
- extern void encode_CRC(unsigned int, Bit_stream_struc*);
- #else
- extern unsigned long read_samples();
- extern unsigned long get_audio();
- extern void read_ana_window();
- extern void window_subband();
- extern void create_ana_filter();
- extern void filter_subband();
- extern void encode_info();
- extern double mod();
- extern void I_combine_LR();
- extern void II_combine_LR();
- extern void I_scale_factor_calc();
- extern void II_scale_factor_calc();
- extern void pick_scale();
- extern void put_scale();
- extern void II_transmission_pattern();
- extern void II_encode_scale();
- extern void I_encode_scale();
- extern int II_bits_for_nonoise();
- extern void II_main_bit_allocation();
- extern int II_a_bit_allocation();
- extern int I_bits_for_nonoise();
- extern void I_main_bit_allocation();
- extern int I_a_bit_allocation();
- extern void I_subband_quantization();
- extern void II_subband_quantization();
- extern void II_encode_bit_alloc();
- extern void I_encode_bit_alloc();
- extern void I_sample_encoding();
- extern void II_sample_encoding();
- extern void encode_CRC();
- #endif
- /* The following functions are in the file "tonal.c" */
- #ifdef PROTO_ARGS
- extern void read_cbound(int, int);
- extern void read_freq_band(g_ptr*, int, int);
- extern void make_map(mask[HAN_SIZE], g_thres*);
- extern double add_db(double, double);
- extern void II_f_f_t(double[FFT_SIZE], mask[HAN_SIZE]);
- extern void II_hann_win(double[FFT_SIZE]);
- extern void II_pick_max(mask[HAN_SIZE], double[SBLIMIT]);
- extern void II_tonal_label(mask[HAN_SIZE], int*);
- extern void noise_label(mask*, int*, g_thres*);
- extern void subsampling(mask[HAN_SIZE], g_thres*, int*, int*);
- extern void threshold(mask[HAN_SIZE], g_thres*, int*, int*, int);
- extern void II_minimum_mask(g_thres*, double[SBLIMIT], int);
- extern void II_smr(double[SBLIMIT], double[SBLIMIT], double[SBLIMIT],
- int);
- extern void II_Psycho_One(short[2][1152], double[2][SBLIMIT],
- double[2][SBLIMIT], frame_params*);
- extern void I_f_f_t(double[FFT_SIZE/2], mask[HAN_SIZE/2]);
- extern void I_hann_win(double[FFT_SIZE/2]);
- extern void I_pick_max(mask[HAN_SIZE/2], double[SBLIMIT]);
- extern void I_tonal_label(mask[HAN_SIZE/2], int*);
- extern void I_minimum_mask(g_thres*, double[SBLIMIT]);
- extern void I_smr(double[SBLIMIT], double[SBLIMIT], double[SBLIMIT]);
- extern void I_Psycho_One(short[2][1152], double[2][SBLIMIT],
- double[2][SBLIMIT], frame_params*);
- #else
- extern void read_cbound();
- extern void read_freq_band();
- extern void make_map();
- extern double add_db();
- extern void II_f_f_t();
- extern void II_hann_win();
- extern void II_pick_max();
- extern void II_tonal_label();
- extern void noise_label();
- extern void subsampling();
- extern void threshold();
- extern void II_minimum_mask();
- extern void II_smr();
- extern void II_Psycho_One();
- extern void I_f_f_t();
- extern void I_hann_win();
- extern void I_pick_max();
- extern void I_tonal_label();
- extern void I_minimum_mask();
- extern void I_smr();
- extern void I_Psycho_One();
- #endif
- /* The following functions are in the file "psy.c" */
- #ifdef PROTO_ARGS
- extern void psycho_anal(short int*, short int[1056], int, int,
- FLOAT[32], double);
- #else
- extern void psycho_anal();
- #endif
- /* The following functions are in the file "subs.c" */
- #ifdef PROTO_ARGS
- extern void fft(FLOAT[BLKSIZE], FLOAT[BLKSIZE], FLOAT[BLKSIZE],
- FLOAT[BLKSIZE], int );
- #else
- extern void fft();
- #endif
- #endif
