/* * FAAC - Freeware Advanced Audio Coder * Copyright (C) 2001 Menno Bakker * * This library is free software; you can redistribute it 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. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details.  * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA * * $Id: coder.h,v 1.13 2005/02/02 07:49:10 sur Exp $ */ #ifndef CODER_H#define CODER_H #ifdef __cplusplusextern "C" {#endif /* __cplusplus */ /* Allow encoding of Digital Radio Mondiale (DRM) *///#define DRM /* Allow encoding of Digital Radio Mondiale (DRM) with transform length 1024 *///#define DRM_1024 #define MAX_CHANNELS 64 #ifdef DRM#ifdef DRM_1024# define FRAME_LEN 1024# define BLOCK_LEN_LONG 1024# define BLOCK_LEN_SHORT 128#else# define FRAME_LEN 960# define BLOCK_LEN_LONG 960# define BLOCK_LEN_SHORT 120#endif /* DRM_1024 */#else# define FRAME_LEN 1024# define BLOCK_LEN_LONG 1024# define BLOCK_LEN_SHORT 128#endif #define NSFB_LONG  51#define NSFB_SHORT 15#define MAX_SHORT_WINDOWS 8#define MAX_SCFAC_BANDS ((NSFB_SHORT+1)*MAX_SHORT_WINDOWS) enum WINDOW_TYPE {    ONLY_LONG_WINDOW,    LONG_SHORT_WINDOW,    ONLY_SHORT_WINDOW,    SHORT_LONG_WINDOW}; #define TNS_MAX_ORDER 20#define DEF_TNS_GAIN_THRESH 1.4#define DEF_TNS_COEFF_THRESH 0.1#define DEF_TNS_COEFF_RES 4#define DEF_TNS_RES_OFFSET 3#define LEN_TNS_NFILTL 2#define LEN_TNS_NFILTS 1 #define LPC 2 typedef struct {    int order;                           /* Filter order */    int direction;                       /* Filtering direction */    int coefCompress;                    /* Are coeffs compressed? */    int length;                          /* Length, in bands */    double aCoeffs[TNS_MAX_ORDER+1];     /* AR Coefficients */    double kCoeffs[TNS_MAX_ORDER+1];     /* Reflection Coefficients */    int index[TNS_MAX_ORDER+1];          /* Coefficient indices */} TnsFilterData; typedef struct {    int numFilters;                             /* Number of filters */    int coefResolution;                         /* Coefficient resolution */    TnsFilterData tnsFilter[1<<LEN_TNS_NFILTL]; /* TNS filters */} TnsWindowData; typedef struct {    int tnsDataPresent;    int tnsMinBandNumberLong;    int tnsMinBandNumberShort;    int tnsMaxBandsLong;    int tnsMaxBandsShort;    int tnsMaxOrderLong;    int tnsMaxOrderShort;    TnsWindowData windowData[MAX_SHORT_WINDOWS]; /* TNS data per window */} TnsInfo; typedef struct{    int psy_init_mc;    double dr_mc[LPC][BLOCK_LEN_LONG],e_mc[LPC+1+1][BLOCK_LEN_LONG];    double K_mc[LPC+1][BLOCK_LEN_LONG], R_mc[LPC+1][BLOCK_LEN_LONG];    double VAR_mc[LPC+1][BLOCK_LEN_LONG], KOR_mc[LPC+1][BLOCK_LEN_LONG];    double sb_samples_pred_mc[BLOCK_LEN_LONG];    int thisLineNeedsResetting_mc[BLOCK_LEN_LONG];    int reset_count_mc;} BwpInfo;  typedef struct {    int window_shape;    int prev_window_shape;    int block_type;    int desired_block_type;     int global_gain;    int sf[MAX_SCFAC_BANDS];    int book[MAX_SCFAC_BANDS];    int bandcnt;    int sfbn;    int sfb_offset[NSFB_LONG + 1];     struct {        int n;        int len[MAX_SHORT_WINDOWS];    } groups;     /* worst case: one codeword with two escapes per two spectral lines */#define DATASIZE (3*FRAME_LEN/2)     struct {        int data;        int len;    } s[DATASIZE];    int datacnt; #ifdef DRM    int num_data_cw[FRAME_LEN];    int cur_cw;    int all_sfb;     int iLenLongestCW;    int iLenReordSpData;#endif     TnsInfo tnsInfo;    BwpInfo bwpInfo;} CoderInfo; typedef struct {  unsigned long sampling_rate;  /* the following entries are for this sampling rate */  int num_cb_long;  int num_cb_short;  int cb_width_long[NSFB_LONG];  int cb_width_short[NSFB_SHORT];} SR_INFO; #ifdef __cplusplus}#endif /* __cplusplus */ #endif /* CODER_H */