FreeCalypso > hg > gsm-codec-lib
view libtwamr/ph_disp.h @ 480:332397bc80aa
doc/AMR-library-API: document public const data items
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 19 May 2024 23:18:17 +0000 |
parents | bde9f5804670 |
children |
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/* ******************************************************************************** * * 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 : ph_disp.h * Purpose : Phase dispersion of excitation signal * ******************************************************************************** */ #ifndef ph_disp_h #define ph_disp_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" /* ******************************************************************************** * LOCAL VARIABLES AND TABLES ******************************************************************************** */ #define PHDGAINMEMSIZE 5 #define PHDTHR1LTP 9830 /* 0.6 in Q14 */ #define PHDTHR2LTP 14746 /* 0.9 in Q14 */ #define ONFACTPLUS1 16384 /* 2.0 in Q13 */ #define ONLENGTH 2 /* ******************************************************************************** * DEFINITION OF DATA TYPES ******************************************************************************** */ typedef struct { Word16 gainMem[PHDGAINMEMSIZE]; Word16 prevState; Word16 prevCbGain; Word16 lockFull; Word16 onset; } ph_dispState; /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ /************************************************************************* * * Function: ph_disp_reset * Purpose: Initializes state memory * ************************************************************************** */ void ph_disp_reset (ph_dispState *state); /************************************************************************* * * Function: ph_disp_lock * Purpose: mark phase dispersion as locked in state struct * ************************************************************************** */ void ph_disp_lock (ph_dispState *state); /************************************************************************* * * Function: ph_disp_release * Purpose: mark phase dispersion as unlocked in state struct * ************************************************************************** */ void ph_disp_release (ph_dispState *state); /************************************************************************* * * Function: ph_disp * Purpose: perform phase dispersion according to the specified codec * mode and computes total excitation for synthesis part * if decoder * ************************************************************************** */ void ph_disp ( ph_dispState *state, /* i/o : State struct */ enum Mode mode, /* i : codec mode */ Word16 x[], /* i/o Q0 : in: LTP excitation signal */ /* out: total excitation signal */ Word16 cbGain, /* i Q1 : Codebook gain */ Word16 ltpGain, /* i Q14 : LTP gain */ Word16 inno[], /* i Q13 : Innovation vector (Q12 for 12.2) */ Word16 pitch_fac, /* i Q14 : pitch factor used to scale the LTP excitation (Q13 for 12.2) */ Word16 tmp_shift /* i Q0 : shift factor applied to sum of scaled LTP ex & innov. before rounding */ ); #endif