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Diffstat (limited to 'opencore/codecs_v2/audio/gsm_amr/amr_nb/enc/src/qgain475.h')
| -rw-r--r-- | opencore/codecs_v2/audio/gsm_amr/amr_nb/enc/src/qgain475.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/opencore/codecs_v2/audio/gsm_amr/amr_nb/enc/src/qgain475.h b/opencore/codecs_v2/audio/gsm_amr/amr_nb/enc/src/qgain475.h new file mode 100644 index 0000000..0dd3f46 --- /dev/null +++ b/opencore/codecs_v2/audio/gsm_amr/amr_nb/enc/src/qgain475.h @@ -0,0 +1,166 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +/**************************************************************************************** +Portions of this file are derived from the following 3GPP standard: + + 3GPP TS 26.073 + ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec + Available from http://www.3gpp.org + +(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) +Permission to distribute, modify and use this file under the standard license +terms listed above has been obtained from the copyright holder. +****************************************************************************************/ +/* +------------------------------------------------------------------------------ + + + + Filename: qgain475.h + +------------------------------------------------------------------------------ + INCLUDE DESCRIPTION + + This file contains the defines and function prototypes used in the + quantization of pitch and codebook gains for MR475. + +------------------------------------------------------------------------------ +*/ +#ifndef _QGAIN475_H_ +#define _QGAIN475_H_ +#define qgain475_h "$Id $" + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "typedef.h" +#include "gc_pred.h" +#include "mode.h" + +/*--------------------------------------------------------------------------*/ +#ifdef __cplusplus +extern "C" +{ +#endif + + /*---------------------------------------------------------------------------- + ; MACROS + ; [Define module specific macros here] + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; DEFINES + ; [Include all pre-processor statements here.] + ----------------------------------------------------------------------------*/ + /* minimum allowed gain code prediction error: 102.887/4096 = 0.0251189 */ +#define MIN_QUA_ENER ( -5443) /* Q10 <-> log2 (0.0251189) */ +#define MIN_QUA_ENER_MR122 (-32768) /* Q10 <-> 20*log10(0.0251189) */ + + /* minimum allowed gain code prediction error: 32000/4096 = 7.8125 */ +#define MAX_QUA_ENER ( 3037) /* Q10 <-> log2 (7.8125) */ +#define MAX_QUA_ENER_MR122 ( 18284) /* Q10 <-> 20*log10(7.8125) */ + + /*---------------------------------------------------------------------------- + ; EXTERNAL VARIABLES REFERENCES + ; [Declare variables used in this module but defined elsewhere] + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; SIMPLE TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; ENUMERATED TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; STRUCTURES TYPEDEF'S + ----------------------------------------------------------------------------*/ + + /*---------------------------------------------------------------------------- + ; GLOBAL FUNCTION DEFINITIONS + ; [List function prototypes here] + ----------------------------------------------------------------------------*/ + + /************************************************************************* + * + * 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 */ + Flag *pOverflow /* o : overflow indicator */ + ); + + /************************************************************************* + * + * 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 */ + Flag *pOverflow /* o : overflow indicator */ + ); +#ifdef __cplusplus +} +#endif + +#endif /* _QGAIN475_H_ */ |