FreeCalypso > hg > gsm-codec-lib
view libtwamr/dec_amr.h @ 466:0c4e1bc06740
amrefr-encode-r: use the new DHF xform that matches T-Mobile
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 12 May 2024 21:44:59 +0000 |
parents | 7bef001cd8b8 |
children |
line wrap: on
line source
/* ***************************************************************************** * * 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_amr.h * Purpose : Speech decoder routine. * ***************************************************************************** */ #ifndef dec_amr_h #define dec_amr_h "$Id $" /* ***************************************************************************** * INCLUDE FILES ***************************************************************************** */ #include "tw_amr.h" #include "typedef.h" #include "cnst.h" #include "dtx_dec.h" #include "d_plsf.h" #include "gc_pred.h" #include "ec_gains.h" #include "ph_disp.h" #include "c_g_aver.h" #include "bgnscd.h" #include "lsp_avg.h" /* ***************************************************************************** * LOCAL VARIABLES AND TABLES ***************************************************************************** */ /*---------------------------------------------------------------* * Postfilter constant parameters (defined in "cnst.h") * *---------------------------------------------------------------* * L_FRAME : Frame size. * * PIT_MAX : Maximum pitch lag. * * L_INTERPOL : Length of filter for interpolation. * * M : LPC order. * *---------------------------------------------------------------*/ /* ***************************************************************************** * DEFINITION OF DATA TYPES ***************************************************************************** */ typedef struct{ /* Excitation vector */ Word16 old_exc[L_SUBFR + PIT_MAX + L_INTERPOL]; Word16 *exc; /* Lsp (Line spectral pairs) */ /* Word16 lsp[M]; */ /* Used by CN codec */ Word16 lsp_old[M]; /* Filter's memory */ Word16 mem_syn[M]; /* pitch sharpening */ Word16 sharp; Word16 old_T0; /* Memories for bad frame handling */ Word16 prev_bf; Word16 prev_pdf; Word16 state; Word16 excEnergyHist[9]; /* Variable holding received ltpLag, used in background noise and BFI */ Word16 T0_lagBuff; /* Variables for the source characteristic detector (SCD) */ Word16 inBackgroundNoise; Word16 voicedHangover; Word16 ltpGainHistory[9]; Bgn_scdState background_state; Word16 nodataSeed; Cb_gain_averageState Cb_gain_averState; lsp_avgState lsp_avg_st; D_plsfState lsfState; ec_gain_pitchState ec_gain_p_st; ec_gain_codeState ec_gain_c_st; gc_predState pred_state; ph_dispState ph_disp_st; dtx_decState dtxDecoderState; } Decoder_amrState; /* ***************************************************************************** * DECLARATION OF PROTOTYPES ***************************************************************************** */ /* ************************************************************************** * * Function : Decoder_amr_reset * Purpose : Resets state memory * Returns : 0 on success * ************************************************************************** */ void Decoder_amr_reset (Decoder_amrState *st, Flag dtx_partial_reset); /* ************************************************************************** * * Function : Decoder_amr * Purpose : Speech decoder routine. * Returns : 0 * ************************************************************************** */ int Decoder_amr ( Decoder_amrState *st, /* i/o : State variables */ enum Mode mode, /* i : AMR mode */ Word16 parm[], /* i : vector of synthesis parameters (PRM_SIZE) */ enum RXFrameType frame_type, /* i : received frame type */ Word16 synth[], /* o : synthesis speech (L_FRAME) */ Word16 A_t[] /* o : decoded LP filter in 4 subframes (AZ_SIZE) */ ); #endif