FreeCalypso > hg > gsm-codec-lib
diff libtwamr/lsp_avg.h @ 389:9cd332a94c97
libtwamr: integrate lsp_avg.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 06 May 2024 06:49:54 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/lsp_avg.h Mon May 06 06:49:54 2024 +0000 @@ -0,0 +1,74 @@ +/* +******************************************************************************** +* +* 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 : lsp_avg.h +* Purpose: : LSP averaging and history +* The LSPs are averaged over 8 frames +* +******************************************************************************** +*/ +#ifndef lsp_avg_h +#define lsp_avg_h "$Id $" + +/* +******************************************************************************** +* INCLUDE FILES +******************************************************************************** +*/ +#include "typedef.h" +#include "cnst.h" + +/* +******************************************************************************** +* LOCAL VARIABLES AND TABLES +******************************************************************************** +*/ + +#define EXPCONST 5243 /* 0.16 in Q15 */ + +/* +******************************************************************************** +* DEFINITION OF DATA TYPES +******************************************************************************** +*/ +typedef struct { + Word16 lsp_meanSave[M]; /* Averaged LSPs saved for efficiency */ +} lsp_avgState; + +/* +******************************************************************************** +* DECLARATION OF PROTOTYPES +******************************************************************************** +*/ + +/* +************************************************************************** +* +* Function : lsp_history_reset +* Purpose : Resets state memory +* +************************************************************************** +*/ +void lsp_avg_reset ( + lsp_avgState *state +); + +/* +************************************************************************** +* +* Function : lsp_avg +* Purpose : Calculate the LSP averages +* +************************************************************************** +*/ +void lsp_avg ( + lsp_avgState *st, /* i/o : State struct Q15 */ + Word16 *lsp /* i : LSP vector Q15 */ +); +#endif