FreeCalypso > hg > gsm-codec-lib
changeset 357:fb001496ca8c
libtwamr: integrate dec_lag3.c
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 05 May 2024 22:29:09 +0000 |
| parents | 5ccfe176bae1 |
| children | 7bea058d0640 |
| files | libtwamr/Makefile libtwamr/dec_lag3.c libtwamr/dec_lag3.h libtwamr/namespace.list |
| diffstat | 4 files changed, 219 insertions(+), 5 deletions(-) [+] |
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--- a/libtwamr/Makefile Sun May 05 22:24:42 2024 +0000 +++ b/libtwamr/Makefile Sun May 05 22:29:09 2024 +0000 @@ -4,11 +4,11 @@ bitno.o bits2prm.o c1035pf.o c2_11pf.o c2_9pf.o c3_14pf.o c4_17pf.o \ c8_31pf.o c_g_aver.o calc_cor.o calc_en.o cbsearch.o convolve.o cor_h.o\ d1035pf.o d2_11pf.o d2_9pf.o d3_14pf.o d4_17pf.o d8_31pf.o d_gain_c.o \ - d_gain_p.o d_plsf.o d_plsf_3.o d_plsf_5.o dec_gain.o dhf_check.o \ - dhf_tables.o gains_tab.o gc_pred.o gmed_n.o graytab.o inv_sqrt.o log2.o\ - lsp_lsf.o oper_32b.o pow2.o prmno.o q_plsf3_tab.o q_plsf5_tab.o \ - qua_gain_tab.o reorder.o s10_8pf.o set_sign.o sqrt_l.o tls_flags.o \ - window.o + d_gain_p.o d_plsf.o d_plsf_3.o d_plsf_5.o dec_gain.o dec_lag3.o \ + dhf_check.o dhf_tables.o gains_tab.o gc_pred.o gmed_n.o graytab.o \ + inv_sqrt.o log2.o lsp_lsf.o oper_32b.o pow2.o prmno.o q_plsf3_tab.o \ + q_plsf5_tab.o qua_gain_tab.o reorder.o s10_8pf.o set_sign.o sqrt_l.o \ + tls_flags.o window.o HDRS= namespace.h LIB= libtwamr.a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/dec_lag3.c Sun May 05 22:29:09 2024 +0000 @@ -0,0 +1,144 @@ +/* +******************************************************************************** +* +* GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 +* R99 Version 3.3.0 +* REL-4 Version 4.1.0 +* +******************************************************************************** +* +* File : dec_lag3.c +* Purpose : Decoding of fractional pitch lag with 1/3 resolution. +* Extract the integer and fraction parts of the pitch lag from +* the received adaptive codebook index. +* +******************************************************************************** +*/ + +/* +******************************************************************************** +* MODULE INCLUDE FILE AND VERSION ID +******************************************************************************** +*/ +#include "namespace.h" +#include "dec_lag3.h" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "typedef.h" +#include "basic_op.h" +#include "no_count.h" + +/* +******************************************************************************** +* LOCAL VARIABLES AND TABLES +******************************************************************************** +*/ + +/* +******************************************************************************** +* PUBLIC PROGRAM CODE +******************************************************************************** +*/ +/************************************************************************* + * FUNCTION: Dec_lag3 + * + * PURPOSE: Decoding of fractional pitch lag with 1/3 resolution. + * Extract the integer and fraction parts of the pitch lag from + * the received adaptive codebook index. + * + * See "Enc_lag3.c" for more details about the encoding procedure. + * + * The fractional lag in 1st and 3rd subframes is encoded with 8 bits + * while that in 2nd and 4th subframes is relatively encoded with 4, 5 + * and 6 bits depending on the mode. + * + *************************************************************************/ +void Dec_lag3(Word16 index, /* i : received pitch index */ + Word16 t0_min, /* i : minimum of search range */ + Word16 t0_max, /* i : maximum of search range */ + Word16 i_subfr, /* i : subframe flag */ + Word16 T0_prev, /* i : integer pitch delay of last subframe + used in 2nd and 4th subframes */ + Word16 * T0, /* o : integer part of pitch lag */ + Word16 * T0_frac, /* o : fractional part of pitch lag */ + Word16 flag4 /* i : flag for encoding with 4 bits */ + ) +{ + Word16 i; + Word16 tmp_lag; + + test (); + if (i_subfr == 0) { /* if 1st or 3rd subframe */ + test (); + if (sub(index, 197) < 0) { + + *T0 = add(mult(add(index, 2), 10923), 19); + + i = add(add(*T0, *T0), *T0); + *T0_frac = add(sub(index, i), 58); + } else { + *T0 = sub(index, 112); + *T0_frac = 0; move16 (); + } + + } else { /* 2nd or 4th subframe */ + + test (); + if (flag4 == 0) { + + /* 'normal' decoding: either with 5 or 6 bit resolution */ + + i = sub(mult(add(index, 2), 10923), 1); + *T0 = add(i, t0_min); + + i = add(add(i, i), i); + *T0_frac = sub(sub(index, 2), i); + } + else { + + /* decoding with 4 bit resolution */ + + tmp_lag = T0_prev; move16 (); + + test (); + if ( sub( sub(tmp_lag, t0_min), 5) > 0) + tmp_lag = add (t0_min, 5); + test (); + if ( sub( sub(t0_max, tmp_lag), 4) > 0) + tmp_lag = sub (t0_max, 4); + + test (); + if (sub(index, 4) < 0) + { + i = sub(tmp_lag, 5); + *T0 = add(i, index); + *T0_frac = 0; move16 (); + } + else + { + test (); + if (sub(index, 12) < 0) + { + i = sub(mult(sub(index, 5), 10923), 1); + *T0 = add(i, tmp_lag); + + i = add(add(i, i), i); + *T0_frac = sub(sub(index, 9), i); + } + else + { + i = add( sub (index, 12), tmp_lag); + *T0 = add (i, 1); + *T0_frac = 0; move16 (); + } + } + + } /* end if (decoding with 4 bit resolution) */ + } + + return; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/dec_lag3.h Sun May 05 22:29:09 2024 +0000 @@ -0,0 +1,69 @@ +/* +******************************************************************************** +* +* GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 +* R99 Version 3.3.0 +* REL-4 Version 4.1.0 +* +******************************************************************************** +* +* File : dec_lag3.h +* Purpose : Decoding of fractional pitch lag with 1/3 resolution. +* Extract the integer and fraction parts of the pitch lag from +* the received adaptive codebook index. +* +******************************************************************************** +*/ +#ifndef dec_lag3_h +#define dec_lag3_h "$Id $" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "typedef.h" + +/* +******************************************************************************** +* LOCAL VARIABLES AND TABLES +******************************************************************************** +*/ + +/* +******************************************************************************** +* DEFINITION OF DATA TYPES +******************************************************************************** +*/ + +/* +******************************************************************************** +* DECLARATION OF PROTOTYPES +******************************************************************************** +*/ +/************************************************************************* + * FUNCTION: Dec_lag3 + * + * PURPOSE: Decoding of fractional pitch lag with 1/3 resolution. + * Extract the integer and fraction parts of the pitch lag from + * the received adaptive codebook index. + * + * See "Enc_lag3.c" for more details about the encoding procedure. + * + * The fractional lag in 1st and 3rd subframes is encoded with 8 bits + * while that in 2nd and 4th subframes is relatively encoded with 4, 5 + * and 6 bits depending on the mode. + * + *************************************************************************/ +void Dec_lag3(Word16 index, /* i : received pitch index */ + Word16 T0_min, /* i : minimum of search range */ + Word16 T0_max, /* i : maximum of search range */ + Word16 i_subfr, /* i : subframe flag */ + Word16 T0_prev, /* i : integer pitch delay of last subframe + used in 2nd and 4th subframes */ + Word16 * T0, /* o : integer part of pitch lag */ + Word16 * T0_frac, /* o : fractional part of pitch lag */ + Word16 flag4 /* i : flag for encoding with 4 bits */ + ); + +#endif