FreeCalypso > hg > gsm-codec-lib
changeset 392:a0f914a28371
libtwamr: integrate post_pro.c
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Mon, 06 May 2024 18:37:52 +0000 |
| parents | be8edf9e6bc1 |
| children | a2351f2ad4f8 |
| files | libtwamr/Makefile libtwamr/namespace.list libtwamr/post_pro.c libtwamr/post_pro.h |
| diffstat | 4 files changed, 190 insertions(+), 1 deletions(-) [+] |
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--- a/libtwamr/Makefile Mon May 06 18:30:00 2024 +0000 +++ b/libtwamr/Makefile Mon May 06 18:37:52 2024 +0000 @@ -10,7 +10,7 @@ gc_pred.o gmed_n.o graytab.o hp_max.o int_lpc.o int_lsf.o inter_36.o \ inv_sqrt.o lag_wind.o levinson.o log2.o lpc.o lsfwt.o lsp.o lsp_avg.o \ lsp_az.o lsp_lsf.o lsp_tab.o mac_32.o oper_32b.o ph_disp.o pitch_fr.o \ - pow2.o prmno.o q_gain_c.o q_gain_p.o q_plsf.o q_plsf3_tab.o \ + post_pro.o pow2.o prmno.o q_gain_c.o q_gain_p.o q_plsf.o q_plsf3_tab.o \ q_plsf5_tab.o q_plsf_3.o q_plsf_5.o qgain475.o qgain795.o qua_gain.o \ qua_gain_tab.o reorder.o s10_8pf.o set_sign.o sqrt_l.o tls_flags.o \ window.o
--- a/libtwamr/namespace.list Mon May 06 18:30:00 2024 +0000 +++ b/libtwamr/namespace.list Mon May 06 18:37:52 2024 +0000 @@ -28,6 +28,7 @@ Lag_window Levinson Levinson_reset Lsf_lsp Lsp_lsf Reorder_lsf Lsf_wt Lsp_Az Pitch_fr Pitch_fr_reset +Post_Process Post_Process_reset Q_plsf_reset Q_plsf_3 Q_plsf_5 Qua_gain agc agc2 agc_reset
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/post_pro.c Mon May 06 18:37:52 2024 +0000 @@ -0,0 +1,122 @@ +/* +******************************************************************************** +* +* 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 : post_pro.c +* Purpose : Postprocessing of output speech. +* +* - 2nd order high pass filtering with cut +* off frequency at 60 Hz. +* - Multiplication of output by two. +* +******************************************************************************** +*/ + +/* +******************************************************************************** +* MODULE INCLUDE FILE AND VERSION ID +******************************************************************************** +*/ +#include "namespace.h" +#include "post_pro.h" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "typedef.h" +#include "basic_op.h" +#include "oper_32b.h" +#include "no_count.h" + +/* +******************************************************************************** +* LOCAL VARIABLES AND TABLES +******************************************************************************** +*/ +/* filter coefficients (fc = 60 Hz) */ +static const Word16 b[3] = {7699, -15398, 7699}; +static const Word16 a[3] = {8192, 15836, -7667}; + +/* +******************************************************************************** +* PUBLIC PROGRAM CODE +******************************************************************************** +*/ + +/************************************************************************* +* +* Function: Post_Process_reset +* Purpose: Initializes state memory to zero +* +************************************************************************** +*/ +void Post_Process_reset (Post_ProcessState *state) +{ + state->y2_hi = 0; + state->y2_lo = 0; + state->y1_hi = 0; + state->y1_lo = 0; + state->x0 = 0; + state->x1 = 0; +} + +/************************************************************************* + * + * FUNCTION: Post_Process() + * + * PURPOSE: Postprocessing of input speech. + * + * DESCRIPTION: + * - 2nd order high pass filtering with cut off frequency at 60 Hz. + * - Multiplication of output by two. + * + * Algorithm: + * + * y[i] = b[0]*x[i]*2 + b[1]*x[i-1]*2 + b[2]*x[i-2]*2 + * + a[1]*y[i-1] + a[2]*y[i-2]; + * + * + *************************************************************************/ +int Post_Process ( + Post_ProcessState *st, /* i/o : post process state */ + Word16 signal[], /* i/o : signal */ + Word16 lg /* i : length of signal */ + ) +{ + Word16 i, x2; + Word32 L_tmp; + + test (); test (); + for (i = 0; i < lg; i++) + { + x2 = st->x1; move16 (); + st->x1 = st->x0; move16 (); + st->x0 = signal[i]; move16 (); + + /* y[i] = b[0]*x[i]*2 + b[1]*x[i-1]*2 + b140[2]*x[i-2]/2 */ + /* + a[1]*y[i-1] + a[2] * y[i-2]; */ + + L_tmp = Mpy_32_16 (st->y1_hi, st->y1_lo, a[1]); + L_tmp = L_add (L_tmp, Mpy_32_16 (st->y2_hi, st->y2_lo, a[2])); + L_tmp = L_mac (L_tmp, st->x0, b[0]); + L_tmp = L_mac (L_tmp, st->x1, b[1]); + L_tmp = L_mac (L_tmp, x2, b[2]); + L_tmp = L_shl (L_tmp, 2); + + /* Multiplication by two of output speech with saturation. */ + signal[i] = round(L_shl(L_tmp, 1)); move16 (); + + st->y2_hi = st->y1_hi; move16 (); + st->y2_lo = st->y1_lo; move16 (); + L_Extract (L_tmp, &st->y1_hi, &st->y1_lo); + } + + return 0; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/post_pro.h Mon May 06 18:37:52 2024 +0000 @@ -0,0 +1,66 @@ +/* +******************************************************************************** +* +* 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 : post_pro.h +* Purpose : Postprocessing of output speech. +* +* - 2nd order high pass filtering with cut +* off frequency at 60 Hz. +* - Multiplication of output by two. +* +******************************************************************************** +*/ +#ifndef post_pro_h +#define post_pro_h "$Id $" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "typedef.h" + +/* +******************************************************************************** +* LOCAL VARIABLES AND TABLES +******************************************************************************** +*/ + +/* +******************************************************************************** +* DEFINITION OF DATA TYPES +******************************************************************************** +*/ +typedef struct { + Word16 y2_hi; + Word16 y2_lo; + Word16 y1_hi; + Word16 y1_lo; + Word16 x0; + Word16 x1; +} Post_ProcessState; + +/* +******************************************************************************** +* DECLARATION OF PROTOTYPES +******************************************************************************** +*/ + +void Post_Process_reset (Post_ProcessState *st); +/* reset of Post processing state (i.e. set state memory to zero) + returns 0 on success + */ + +int Post_Process ( + Post_ProcessState *st, /* i/o : post process state */ + Word16 signal[], /* i/o : signal */ + Word16 lg /* i : lenght of signal */ + ); + +#endif