FreeCalypso > hg > gsm-codec-lib
view libtwamr/qgain475.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 | 1d2b39027b70 |
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 : qgain475.h * Purpose : Quantization of pitch and codebook gains for MR475. * ******************************************************************************** */ #ifndef qgain475_h #define qgain475_h "$Id $" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "typedef.h" #include "gc_pred.h" /* ******************************************************************************** * DECLARATION OF PROTOTYPES ******************************************************************************** */ /************************************************************************* * * FUNCTION: MR475_update_unq_pred() * * PURPOSE: use optimum codebook gain and update "unquantized" * gain predictor with the (bounded) prediction error * *************************************************************************/ void MR475_update_unq_pred( gc_predState *pred_st, /* i/o: gain predictor state struct */ Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */ Word16 frac_gcode0, /* i : predicted CB gain (fraction), Q15 */ Word16 cod_gain_exp, /* i : optimum codebook gain (exponent), Q0 */ Word16 cod_gain_frac /* i : optimum codebook gain (fraction), Q15 */ ); /************************************************************************* * * FUNCTION: MR475_gain_quant() * * PURPOSE: Quantization of pitch and codebook gains for two subframes * (using predicted codebook gain) * *************************************************************************/ Word16 MR475_gain_quant( /* o : index of quantization. */ gc_predState *pred_st, /* i/o: gain predictor state struct */ /* data from subframe 0 (or 2) */ Word16 sf0_exp_gcode0, /* i : predicted CB gain (exponent), Q0 */ Word16 sf0_frac_gcode0, /* i : predicted CB gain (fraction), Q15 */ Word16 sf0_exp_coeff[], /* i : energy coeff. (5), exponent part, Q0 */ Word16 sf0_frac_coeff[], /* i : energy coeff. (5), fraction part, Q15 */ /* (frac_coeff and exp_coeff computed in */ /* calc_filt_energies()) */ Word16 sf0_exp_target_en, /* i : exponent of target energy, Q0 */ Word16 sf0_frac_target_en, /* i : fraction of target energy, Q15 */ /* data from subframe 1 (or 3) */ Word16 sf1_code_nosharp[], /* i : innovative codebook vector (L_SUBFR) */ /* (whithout pitch sharpening) */ Word16 sf1_exp_gcode0, /* i : predicted CB gain (exponent), Q0 */ Word16 sf1_frac_gcode0, /* i : predicted CB gain (fraction), Q15 */ Word16 sf1_exp_coeff[], /* i : energy coeff. (5), exponent part, Q0 */ Word16 sf1_frac_coeff[], /* i : energy coeff. (5), fraction part, Q15 */ /* (frac_coeff and exp_coeff computed in */ /* calc_filt_energies()) */ Word16 sf1_exp_target_en, /* i : exponent of target energy, Q0 */ Word16 sf1_frac_target_en, /* i : fraction of target energy, Q15 */ Word16 gp_limit, /* i : pitch gain limit */ Word16 *sf0_gain_pit, /* o : Pitch gain, Q14 */ Word16 *sf0_gain_cod, /* o : Code gain, Q1 */ Word16 *sf1_gain_pit, /* o : Pitch gain, Q14 */ Word16 *sf1_gain_cod /* o : Code gain, Q1 */ ); #endif