/* * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische * Universitaet Berlin. See the accompanying file "COPYRIGHT" for * details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. */ #ifndef PRIVATE_H #define PRIVATE_H /* Added by Erik de Castro Lopo */ #define USE_FLOAT_MUL #define FAST #define WAV49 #ifdef __cplusplus #error "This code is not designed to be compiled with a C++ compiler." #endif /* Added by Erik de Castro Lopo */ typedef short word; /* 16 bit signed int */ typedef int longword; /* 32 bit signed int */ typedef unsigned short uword; /* unsigned word */ typedef unsigned int ulongword; /* unsigned longword */ struct gsm_state { word dp0[ 280 ] ; word z1; /* preprocessing.c, Offset_com. */ longword L_z2; /* Offset_com. */ int mp; /* Preemphasis */ word u[8] ; /* short_term_aly_filter.c */ word LARpp[2][8] ; /* */ word j; /* */ word ltp_cut; /* long_term.c, LTP crosscorr. */ word nrp; /* 40 */ /* long_term.c, synthesis */ word v[9] ; /* short_term.c, synthesis */ word msr; /* decoder.c, Postprocessing */ char verbose; /* only used if !NDEBUG */ char fast; /* only used if FAST */ char wav_fmt; /* only used if WAV49 defined */ unsigned char frame_index; /* odd/even chaining */ unsigned char frame_chain; /* half-byte to carry forward */ /* Moved here from code.c where it was defined as static */ word e[50] ; } ; typedef struct gsm_state GSM_STATE ; #define MIN_WORD (-32767 - 1) #define MAX_WORD 32767 #define MIN_LONGWORD (-2147483647 - 1) #define MAX_LONGWORD 2147483647 /* Signed arithmetic shift right. */ static inline word SASR_W (word x, word by) { return (x >> by) ; } /* SASR */ static inline longword SASR_L (longword x, word by) { return (x >> by) ; } /* SASR */ /* * Prototypes from add.c */ word gsm_mult (word a, word b) ; longword gsm_L_mult (word a, word b) ; word gsm_mult_r (word a, word b) ; word gsm_div (word num, word denum) ; word gsm_add (word a, word b ) ; longword gsm_L_add (longword a, longword b ) ; word gsm_sub (word a, word b) ; longword gsm_L_sub (longword a, longword b) ; word gsm_abs (word a) ; word gsm_norm (longword a ) ; longword gsm_L_asl (longword a, int n) ; word gsm_asl (word a, int n) ; longword gsm_L_asr (longword a, int n) ; word gsm_asr (word a, int n) ; /* * Inlined functions from add.h */ static inline longword GSM_MULT_R (word a, word b) { return (((longword) (a)) * ((longword) (b)) + 16384) >> 15 ; } /* GSM_MULT_R */ static inline longword GSM_MULT (word a, word b) { return (((longword) (a)) * ((longword) (b))) >> 15 ; } /* GSM_MULT */ static inline longword GSM_L_MULT (word a, word b) { return ((longword) (a)) * ((longword) (b)) << 1 ; } /* GSM_L_MULT */ static inline longword GSM_L_ADD (longword a, longword b) { ulongword utmp ; if (a < 0 && b < 0) { utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1) ; return (utmp >= (ulongword) MAX_LONGWORD) ? MIN_LONGWORD : -(longword)utmp-2 ; } ; if (a > 0 && b > 0) { utmp = (ulongword) a + (ulongword) b ; return (utmp >= (ulongword) MAX_LONGWORD) ? MAX_LONGWORD : utmp ; } ; return a + b ; } /* GSM_L_ADD */ static inline longword GSM_ADD (word a, word b) { longword ltmp ; ltmp = ((longword) a) + ((longword) b) ; if (ltmp >= MAX_WORD) return MAX_WORD ; if (ltmp <= MIN_WORD) return MIN_WORD ; return ltmp ; } /* GSM_ADD */ static inline longword GSM_SUB (word a, word b) { longword ltmp ; ltmp = ((longword) a) - ((longword) b) ; if (ltmp >= MAX_WORD) ltmp = MAX_WORD ; else if (ltmp <= MIN_WORD) ltmp = MIN_WORD ; return ltmp ; } /* GSM_SUB */ static inline word GSM_ABS (word a) { if (a > 0) return a ; if (a == MIN_WORD) return MAX_WORD ; return -a ; } /* GSM_ADD */ /* * More prototypes from implementations.. */ void Gsm_Coder ( struct gsm_state * S, word * s, /* [0..159] samples IN */ word * LARc, /* [0..7] LAR coefficients OUT */ word * Nc, /* [0..3] LTP lag OUT */ word * bc, /* [0..3] coded LTP gain OUT */ word * Mc, /* [0..3] RPE grid selection OUT */ word * xmaxc,/* [0..3] Coded maximum amplitude OUT */ word * xMc) ;/* [13*4] normalized RPE samples OUT */ void Gsm_Long_Term_Predictor ( /* 4x for 160 samples */ struct gsm_state * S, word * d, /* [0..39] residual signal IN */ word * dp, /* [-120..-1] d' IN */ word * e, /* [0..40] OUT */ word * dpp, /* [0..40] OUT */ word * Nc, /* correlation lag OUT */ word * bc) ; /* gain factor OUT */ void Gsm_LPC_Analysis ( struct gsm_state * S, word * s, /* 0..159 signals IN/OUT */ word * LARc) ; /* 0..7 LARc's OUT */ void Gsm_Preprocess ( struct gsm_state * S, word * s, word * so) ; void Gsm_Encoding ( struct gsm_state * S, word * e, word * ep, word * xmaxc, word * Mc, word * xMc) ; void Gsm_Short_Term_Analysis_Filter ( struct gsm_state * S, word * LARc, /* coded log area ratio [0..7] IN */ word * d) ; /* st res. signal [0..159] IN/OUT */ void Gsm_Decoder ( struct gsm_state * S, word * LARcr, /* [0..7] IN */ word * Ncr, /* [0..3] IN */ word * bcr, /* [0..3] IN */ word * Mcr, /* [0..3] IN */ word * xmaxcr, /* [0..3] IN */ word * xMcr, /* [0..13*4] IN */ word * s) ; /* [0..159] OUT */ void Gsm_Decoding ( struct gsm_state * S, word xmaxcr, word Mcr, word * xMcr, /* [0..12] IN */ word * erp) ; /* [0..39] OUT */ void Gsm_Long_Term_Synthesis_Filtering ( struct gsm_state* S, word Ncr, word bcr, word * erp, /* [0..39] IN */ word * drp) ; /* [-120..-1] IN, [0..40] OUT */ void Gsm_RPE_Decoding ( /*-struct gsm_state *S,-*/ word xmaxcr, word Mcr, word * xMcr, /* [0..12], 3 bits IN */ word * erp) ; /* [0..39] OUT */ void Gsm_RPE_Encoding ( /*-struct gsm_state * S,-*/ word * e, /* -5..-1][0..39][40..44 IN/OUT */ word * xmaxc, /* OUT */ word * Mc, /* OUT */ word * xMc) ; /* [0..12] OUT */ void Gsm_Short_Term_Synthesis_Filter ( struct gsm_state * S, word * LARcr, /* log area ratios [0..7] IN */ word * drp, /* received d [0...39] IN */ word * s) ; /* signal s [0..159] OUT */ void Gsm_Update_of_reconstructed_short_time_residual_signal ( word * dpp, /* [0...39] IN */ word * ep, /* [0...39] IN */ word * dp) ; /* [-120...-1] IN/OUT */ /* * Tables from table.c */ #ifndef GSM_TABLE_C extern word gsm_A [8], gsm_B [8], gsm_MIC [8], gsm_MAC [8] ; extern word gsm_INVA [8] ; extern word gsm_DLB [4], gsm_QLB [4] ; extern word gsm_H [11] ; extern word gsm_NRFAC [8] ; extern word gsm_FAC [8] ; #endif /* GSM_TABLE_C */ /* * Debugging */ #ifdef NDEBUG # define gsm_debug_words(a, b, c, d) /* nil */ # define gsm_debug_longwords(a, b, c, d) /* nil */ # define gsm_debug_word(a, b) /* nil */ # define gsm_debug_longword(a, b) /* nil */ #else /* !NDEBUG => DEBUG */ void gsm_debug_words (char * name, int, int, word *) ; void gsm_debug_longwords (char * name, int, int, longword *) ; void gsm_debug_longword (char * name, longword) ; void gsm_debug_word (char * name, word) ; #endif /* !NDEBUG */ #endif /* PRIVATE_H */