+/*
+ * 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.
+ */
+
+/*$Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/private.h,v 1.6 1996/07/02 10:15:26 jutta Exp $*/
+
+#ifndef PRIVATE_H
+#define PRIVATE_H
+
+typedef short word; /* 16 bit signed int */
+typedef long longword; /* 32 bit signed int */
+
+typedef unsigned short uword; /* unsigned word */
+typedef unsigned long ulongword; /* unsigned longword */
+
+struct gsm_state {
+
+ word dp0[ 280 ];
+ word e[ 50 ]; /* code.c */
+
+ 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 */
+};
+
+
+#define MIN_WORD (-32767 - 1)
+#define MAX_WORD 32767
+
+#define MIN_LONGWORD (-2147483647 - 1)
+#define MAX_LONGWORD 2147483647
+
+#ifdef SASR /* flag: >> is a signed arithmetic shift right */
+#undef SASR
+#define SASR(x, by) ((x) >> (by))
+#else
+#define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
+#endif /* SASR */
+
+#include "proto.h"
+
+/*
+ * Prototypes from add.c
+ */
+extern word gsm_mult P((word a, word b));
+extern longword gsm_L_mult P((word a, word b));
+extern word gsm_mult_r P((word a, word b));
+
+extern word gsm_div P((word num, word denum));
+
+extern word gsm_add P(( word a, word b ));
+extern longword gsm_L_add P(( longword a, longword b ));
+
+extern word gsm_sub P((word a, word b));
+extern longword gsm_L_sub P((longword a, longword b));
+
+extern word gsm_abs P((word a));
+
+extern word gsm_norm P(( longword a ));
+
+extern longword gsm_L_asl P((longword a, int n));
+extern word gsm_asl P((word a, int n));
+
+extern longword gsm_L_asr P((longword a, int n));
+extern word gsm_asr P((word a, int n));
+
+/*
+ * Inlined functions from add.h
+ */
+
+/*
+ * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
+ * (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
+ */
+#define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \
+ (SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
+
+# define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \
+ (SASR( ((longword)(a) * (longword)(b)), 15 ))
+
+# define GSM_L_MULT(a, b) /* word a, word b */ \
+ (((longword)(a) * (longword)(b)) << 1)
+
+# define GSM_L_ADD(a, b) \
+ ( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
+ : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
+ >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
+ : ((b) <= 0 ? (a) + (b) \
+ : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
+ ? MAX_LONGWORD : utmp))
+
+/*
+ * # define GSM_ADD(a, b) \
+ * ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
+ * ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
+ */
+/* Nonportable, but faster: */
+
+#define GSM_ADD(a, b) \
+ ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
+ MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
+
+# define GSM_SUB(a, b) \
+ ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
+ ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
+
+# define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
+
+/* Use these if necessary:
+
+# define GSM_MULT_R(a, b) gsm_mult_r(a, b)
+# define GSM_MULT(a, b) gsm_mult(a, b)
+# define GSM_L_MULT(a, b) gsm_L_mult(a, b)
+
+# define GSM_L_ADD(a, b) gsm_L_add(a, b)
+# define GSM_ADD(a, b) gsm_add(a, b)
+# define GSM_SUB(a, b) gsm_sub(a, b)
+
+# define GSM_ABS(a) gsm_abs(a)
+
+*/
+
+/*
+ * More prototypes from implementations..
+ */
+extern void Gsm_Coder P((
+ 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 */));
+
+extern void Gsm_Long_Term_Predictor P(( /* 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 */));
+
+extern void Gsm_LPC_Analysis P((
+ struct gsm_state * S,
+ word * s, /* 0..159 signals IN/OUT */
+ word * LARc)); /* 0..7 LARc's OUT */
+
+extern void Gsm_Preprocess P((
+ struct gsm_state * S,
+ word * s, word * so));
+
+extern void Gsm_Encoding P((
+ struct gsm_state * S,
+ word * e,
+ word * ep,
+ word * xmaxc,
+ word * Mc,
+ word * xMc));
+
+extern void Gsm_Short_Term_Analysis_Filter P((
+ struct gsm_state * S,
+ word * LARc, /* coded log area ratio [0..7] IN */
+ word * d /* st res. signal [0..159] IN/OUT */));
+
+extern void Gsm_Decoder P((
+ 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 */
+
+extern void Gsm_Decoding P((
+ struct gsm_state * S,
+ word xmaxcr,
+ word Mcr,
+ word * xMcr, /* [0..12] IN */
+ word * erp)); /* [0..39] OUT */
+
+extern void Gsm_Long_Term_Synthesis_Filtering P((
+ 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 P((
+ struct gsm_state *S,
+ word xmaxcr,
+ word Mcr,
+ word * xMcr, /* [0..12], 3 bits IN */
+ word * erp)); /* [0..39] OUT */
+
+void Gsm_RPE_Encoding P((
+ 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 */
+
+extern void Gsm_Short_Term_Synthesis_Filter P((
+ 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 */
+
+extern void Gsm_Update_of_reconstructed_short_time_residual_signal P((
+ 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 */
+
+ extern void gsm_debug_words P((char * name, int, int, word *));
+ extern void gsm_debug_longwords P((char * name, int, int, longword *));
+ extern void gsm_debug_longword P((char * name, longword));
+ extern void gsm_debug_word P((char * name, word));
+
+#endif /* !NDEBUG */
+
+#include "unproto.h"
+
+#endif /* PRIVATE_H */
projects / lcr.git / blobdiff