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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"
- #include "mode.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
|
