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annotate libtwamr/qua_gain.h @ 458:e26b974f7ba3

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doc/AMR-study-utils: update for the current situation
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 18:45:36 +0000
parents b02e043dcba0
children
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b02e043dcba0 libtwamr: integrate qua_gain.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : qua_gain.h
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11 * Purpose : Quantization of pitch and codebook gains.
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef qua_gain_h
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16 #define qua_gain_h "$Id $"
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17
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18 /*
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19 ********************************************************************************
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20 * INCLUDE FILES
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21 ********************************************************************************
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22 */
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23 #include "tw_amr.h"
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24 #include "typedef.h"
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25
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26 /*
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27 ********************************************************************************
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28 * DECLARATION OF PROTOTYPES
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29 ********************************************************************************
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30 */
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31 /*************************************************************************
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32 *
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33 * FUNCTION: Qua_gain()
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34 *
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35 * PURPOSE: Quantization of pitch and codebook gains.
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36 * (using predicted codebook gain)
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37 *
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38 *************************************************************************/
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39 Word16
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40 Qua_gain( /* o : index of quantization. */
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41 enum Mode mode, /* i : AMR mode */
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42 Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */
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43 Word16 frac_gcode0, /* i : predicted CB gain (fraction), Q15 */
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44 Word16 frac_coeff[], /* i : energy coeff. (5), fraction part, Q15 */
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45 Word16 exp_coeff[], /* i : energy coeff. (5), exponent part, Q0 */
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46 /* (frac_coeff and exp_coeff computed in */
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47 /* calc_filt_energies()) */
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48 Word16 gp_limit, /* i : pitch gain limit */
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49 Word16 *gain_pit, /* o : Pitch gain, Q14 */
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50 Word16 *gain_cod, /* o : Code gain, Q1 */
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51 Word16 *qua_ener_MR122, /* o : quantized energy error, Q10 */
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52 /* (for MR122 MA predictor update) */
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53 Word16 *qua_ener /* o : quantized energy error, Q10 */
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54 /* (for other MA predictor update) */
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55 );
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56 #endif