qgain475.cpp

实现3GPP的GSM中AMR语音的CODECS。

/* ------------------------------------------------------------------
 * Copyright (C) 2008 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.
****************************************************************************************/
/*
------------------------------------------------------------------------------



 Pathname: ./audio/gsm-amr/c/src/qgain475.c
 Funtions: MR475_quant_store_results
           MR475_update_unq_pred
           MR475_gain_quant

     Date: 05/17/2000

------------------------------------------------------------------------------
 REVISION HISTORY

 Description: Synchronized file with UMTS version 3.2.0. Updated coding
              template. Removed unnecessary include files.

 Description: Made the following chnages per comments from Phase 2/3 review:
              1. Updated copyright year,
              2. Used short-hand notation for math operations, e.g., "+=",
                 in the code.
              3. Defined one local variable per line.
              4. Moved #defines to qgain475.h.

 Description: Added parameter "pOverflow" for EPOC compatibility.

 Description: Removed bug where a variable was incorrectly used as a
 temporary placeholder.

 Description: Optimized file to reduce clock cycle usage. Updated copyright
              year. Removed unused files in Include section.

 Description:  Replaced "int" and/or "char" with OSCL defined types.

 Description: Changed round function name to pv_round to avoid conflict with
              round function in C standard library.

 Description:

------------------------------------------------------------------------------
 MODULE DESCRIPTION

 These modules handle the quantization of pitch and codebook gains for MR475.

------------------------------------------------------------------------------
*/


/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "qgain475.h"
#include "typedef.h"
#include "basic_op.h"
#include "mode.h"
#include "cnst.h"
#include "pow2.h"
#include "log2.h"

/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/


/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define MR475_VQ_SIZE 256

/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------
; LOCAL VARIABLE DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/

/* The table contains the following data:
 *
 *    g_pitch(0)        (Q14) // for sub-
 *    g_fac(0)          (Q12) // frame 0 and 2
 *    g_pitch(1)        (Q14) // for sub-
 *    g_fac(2)          (Q12) // frame 1 and 3
 *
 */
static const Word16 table_gain_MR475[MR475_VQ_SIZE*4] =
{
    /*g_pit(0), g_fac(0),      g_pit(1), g_fac(1) */
    812,          128,           542,      140,
    2873,         1135,          2266,     3402,
    2067,          563,         12677,      647,
    4132,         1798,          5601,     5285,
    7689,          374,          3735,      441,
    10912,         2638,         11807,     2494,
    20490,          797,          5218,      675,
    6724,         8354,          5282,     1696,
    1488,          428,          5882,      452,
    5332,         4072,          3583,     1268,
    2469,          901,         15894,     1005,
    14982,         3271,         10331,     4858,
    3635,         2021,          2596,      835,
    12360,         4892,         12206,     1704,
    13432,         1604,          9118,     2341,
    3968,         1538,          5479,     9936,
    3795,          417,          1359,      414,
    3640,         1569,          7995,     3541,
    11405,          645,          8552,      635,
    4056,         1377,         16608,     6124,
    11420,          700,          2007,      607,
    12415,         1578,         11119,     4654,
    13680,         1708,         11990,     1229,
    7996,         7297,         13231,     5715,
    2428,         1159,          2073,     1941,
    6218,         6121,          3546,     1804,
    8925,         1802,          8679,     1580,
    13935,         3576,         13313,     6237,
    6142,         1130,          5994,     1734,
    14141,         4662,         11271,     3321,
    12226,         1551,         13931,     3015,
    5081,        10464,          9444,     6706,
    1689,          683,          1436,     1306,
    7212,         3933,          4082,     2713,
    7793,          704,         15070,      802,
    6299,         5212,          4337,     5357,
    6676,          541,          6062,      626,
    13651,         3700,         11498,     2408,
    16156,          716,         12177,      751,
    8065,        11489,          6314,     2256,
    4466,          496,          7293,      523,
    10213,         3833,          8394,     3037,
    8403,          966,         14228,     1880,
    8703,         5409,         16395,     4863,
    7420,         1979,          6089,     1230,
    9371,         4398,         14558,     3363,
    13559,         2873,         13163,     1465,
    5534,         1678,         13138,    14771,
    7338,          600,          1318,      548,
    4252,         3539,         10044,     2364,
    10587,          622,         13088,      669,
    14126,         3526,          5039,     9784,
    15338,          619,          3115,      590,
    16442,         3013,         15542,     4168,
    15537,         1611,         15405,     1228,
    16023,         9299,          7534,     4976,
    1990,         1213,         11447,     1157,
    12512,         5519,          9475,     2644,
    7716,         2034,         13280,     2239,
    16011,         5093,          8066,     6761,
    10083,         1413,          5002,     2347,
    12523,         5975,         15126,     2899,
    18264,         2289,         15827,     2527,
    16265,        10254,         14651,    11319,
    1797,          337,          3115,      397,
    3510,         2928,          4592,     2670,
    7519,          628,         11415,      656,
    5946,         2435,          6544,     7367,
    8238,          829,          4000,      863,
    10032,         2492,         16057,     3551,
    18204,         1054,          6103,     1454,
    5884,         7900,         18752,     3468,
    1864,          544,          9198,      683,
    11623,         4160,          4594,     1644,
    3158,         1157,         15953,     2560,
    12349,         3733,         17420,     5260,
    6106,         2004,          2917,     1742,
    16467,         5257,         16787,     1680,
    17205,         1759,          4773,     3231,
    7386,         6035,         14342,    10012,
    4035,          442,          4194,      458,
    9214,         2242,          7427,     4217,
    12860,          801,         11186,      825,
    12648,         2084,         12956,     6554,
    9505,          996,          6629,      985,
    10537,         2502,         15289,     5006,
    12602,         2055,         15484,     1653,
    16194,         6921,         14231,     5790,
    2626,          828,          5615,     1686,
    13663,         5778,          3668,     1554,
    11313,         2633,          9770,     1459,
    14003,         4733,         15897,     6291,
    6278,         1870,          7910,     2285,
    16978,         4571,         16576,     3849,
    15248,         2311,         16023,     3244,
    14459,        17808,         11847,     2763,
    1981,         1407,          1400,      876,
    4335,         3547,          4391,     4210,
    5405,          680,         17461,      781,
    6501,         5118,          8091,     7677,
    7355,          794,          8333,     1182,
    15041,         3160,         14928,     3039,
    20421,          880,         14545,      852,
    12337,        14708,          6904,     1920,
    4225,          933,          8218,     1087,
    10659,         4084,         10082,     4533,
    2735,          840,         20657,     1081,
    16711,         5966,         15873,     4578,
    10871,         2574,          3773,     1166,
    14519,         4044,         20699,     2627,
    15219,         2734,         15274,     2186,
    6257,         3226,         13125,    19480,
    7196,          930,          2462,     1618,
    4515,         3092,         13852,     4277,
    10460,          833,         17339,      810,
    16891,         2289,         15546,     8217,
    13603,         1684,          3197,     1834,
    15948,         2820,         15812,     5327,
    17006,         2438,         16788,     1326,
    15671,         8156,         11726,     8556,
    3762,         2053,          9563,     1317,
    13561,         6790,         12227,     1936,
    8180,         3550,         13287,     1778,
    16299,         6599,         16291,     7758,
    8521,         2551,          7225,     2645,
    18269,         7489,         16885,     2248,
    17882,         2884,         17265,     3328,
    9417,        20162,         11042,     8320,
    1286,          620,          1431,      583,
    5993,         2289,          3978,     3626,
    5144,          752,         13409,      830,
    5553,         2860,         11764,     5908,
    10737,          560,          5446,      564,
    13321,         3008,         11946,     3683,
    19887,          798,          9825,      728,
    13663,         8748,          7391,     3053,
    2515,          778,          6050,      833,
    6469,         5074,          8305,     2463,
    6141,         1865,         15308,     1262,
    14408,         4547,         13663,     4515,
    3137,         2983,          2479,     1259,
    15088,         4647,         15382,     2607,
    14492,         2392,         12462,     2537,
    7539,         2949,         12909,    12060,
    5468,          684,          3141,      722,
    5081,         1274,         12732,     4200,
    15302,          681,          7819,      592,
    6534,         2021,         16478,     8737,
    13364,          882,          5397,      899,
    14656,         2178,         14741,     4227,
    14270,         1298,         13929,     2029,
    15477,         7482,         15815,     4572,
    2521,         2013,          5062,     1804,
    5159,         6582,          7130,     3597,
    10920,         1611,         11729,     1708,
    16903,         3455,         16268,     6640,
    9306,         1007,          9369,     2106,
    19182,         5037,         12441,     4269,
    15919,         1332,         15357,     3512,
    11898,        14141,         16101,     6854,
    2010,          737,          3779,      861,
    11454,         2880,          3564,     3540,
    9057,         1241,         12391,      896,
    8546,         4629,         11561,     5776,
    8129,          589,          8218,      588,
    18728,         3755,         12973,     3149,
    15729,          758,         16634,      754,
    15222,        11138,         15871,     2208,
    4673,          610,         10218,      678,
    15257,         4146,          5729,     3327,
    8377,         1670,         19862,     2321,
    15450,         5511,         14054,     5481,
    5728,         2888,          7580,     1346,
    14384,         5325,         16236,     3950,
    15118,         3744,         15306,     1435,
    14597,         4070,         12301,    15696,
    7617,         1699,          2170,      884,
    4459,         4567,         18094,     3306,
    12742,          815,         14926,      907,
    15016,         4281,         15518,     8368,
    17994,         1087,          2358,      865,
    16281,         3787,         15679,     4596,
    16356,         1534,         16584,     2210,
    16833,         9697,         15929,     4513,
    3277,         1085,          9643,     2187,
    11973,         6068,          9199,     4462,
    8955,         1629,         10289,     3062,
    16481,         5155,         15466,     7066,
    13678,         2543,          5273,     2277,
    16746,         6213,         16655,     3408,
    20304,         3363,         18688,     1985,
    14172,        12867,         15154,    15703,
    4473,         1020,          1681,      886,
    4311,         4301,          8952,     3657,
    5893,         1147,         11647,     1452,
    15886,         2227,          4582,     6644,
    6929,         1205,          6220,      799,
    12415,         3409,         15968,     3877,
    19859,         2109,          9689,     2141,
    14742,         8830,         14480,     2599,
    1817,         1238,          7771,      813,
    19079,         4410,          5554,     2064,
    3687,         2844,         17435,     2256,
    16697,         4486,         16199,     5388,
    8028,         2763,          3405,     2119,
    17426,         5477,         13698,     2786,
    19879,         2720,          9098,     3880,
    18172,         4833,         17336,    12207,
    5116,          996,          4935,      988,
    9888,         3081,          6014,     5371,
    15881,         1667,          8405,     1183,
    15087,         2366,         19777,     7002,
    11963,         1562,          7279,     1128,
    16859,         1532,         15762,     5381,
    14708,         2065,         20105,     2155,
    17158,         8245,         17911,     6318,
    5467,         1504,          4100,     2574,
    17421,         6810,          5673,     2888,
    16636,         3382,          8975,     1831,
    20159,         4737,         19550,     7294,
    6658,         2781,         11472,     3321,
    19397,         5054,         18878,     4722,
    16439,         2373,         20430,     4386,
    11353,        26526,         11593,     3068,
    2866,         1566,          5108,     1070,
    9614,         4915,          4939,     3536,
    7541,          878,         20717,      851,
    6938,         4395,         16799,     7733,
    10137,         1019,          9845,      964,
    15494,         3955,         15459,     3430,
    18863,          982,         20120,      963,
    16876,        12887,         14334,     4200,
    6599,         1220,          9222,      814,
    16942,         5134,          5661,     4898,
    5488,         1798,         20258,     3962,
    17005,         6178,         17929,     5929,
    9365,         3420,          7474,     1971,
    19537,         5177,         19003,     3006,
    16454,         3788,         16070,     2367,
    8664,         2743,          9445,    26358,
    10856,         1287,          3555,     1009,
    5606,         3622,         19453,     5512,
    12453,          797,         20634,      911,
    15427,         3066,         17037,    10275,
    18883,         2633,          3913,     1268,
    19519,         3371,         18052,     5230,
    19291,         1678,         19508,     3172,