FreeCalypso > hg > gsm-codec-lib
view libtwamr/lsp.h @ 399:3618b5cf25a6
libtwamr: integrate preemph.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 06 May 2024 19:19:27 +0000 |
parents | 550d3594c878 |
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 : lsp.h * Purpose : Conversion from A(z) to LSP. Quantization and * interpolation of LSPs. * ******************************************************************************** */ #ifndef lsp_h #define lsp_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "tw_amr.h" #include "typedef.h" #include "q_plsf.h" /* ******************************************************************************** * LOCAL VARIABLES AND TABLES ******************************************************************************** */ /* ******************************************************************************** * DEFINITION OF DATA TYPES ******************************************************************************** */ typedef struct { /* Past LSPs */ Word16 lsp_old[M]; Word16 lsp_old_q[M]; /* Quantization state */ Q_plsfState qSt; } lspState; /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ /* ************************************************************************** * * Function : lsp_reset * Purpose : Resets state memory * Returns : 0 on success * ************************************************************************** */ void lsp_reset (lspState *st); /* ************************************************************************** * * Function : lsp * Purpose : Conversion from LP coefficients to LSPs. * Quantization of LSPs. * Description : Generates 2 sets of LSPs from 2 sets of * LP coefficients for mode 12.2. For the other * modes 1 set of LSPs is generated from 1 set of * LP coefficients. These LSPs are quantized with * Matrix/Vector quantization (depending on the mode) * and interpolated for the subframes not yet having * their own LSPs. * ************************************************************************** */ int lsp(lspState *st, /* i/o : State struct */ enum Mode req_mode, /* i : requested coder mode */ enum Mode used_mode, /* i : used coder mode */ Word16 az[], /* i/o : interpolated LP parameters Q12 */ Word16 azQ[], /* o : quantization interpol. LP parameters Q12*/ Word16 lsp_new[], /* o : new lsp vector */ Word16 **anap /* o : analysis parameters */ ); #endif